Pump installation sequence: technical preparation → foundation acceptance → unpacking inspection → equipment lifting in place → primary leveling alignment → secondary irrigation impeller → fine leveling alignment → secondary grouting → centering of pump and motor jaw coupling → process pipeline installation → centering and stress review → trial preparation, single test → load test → delivery and acceptance.

Please note: if it is a large flow pump, the pump speed is very low, the reducer power is large. Low speed gear couplings are also available.

Precautions: The inside of the pipe connected to the device should be cleaned. The fixed welds should be far away from the equipment. No additional forces are allowed to be applied to the equipment. Temporary blind plates should be added to the inlet and outlet of the equipment, which can be removed after the pipes are blown clean. The flange spacing should be the minimum distance that can be put into the gasket smoothly. When the pipe is finally connected, the radial displacement should be monitored with a dial gauge on the coupling. When the rotational speed is less than 6000 RPM, the displacement is less than or equal to 0.05mm. When the speed is greater than 6000rpm, the displacement is less than or equal to 0.02mm. Otherwise, adjust the pipe.

When stainless steel gear pump inlet pipe system has reducer pipe, the pipe diameter ≥DN65 uses eccentric size head to prevent gas accumulation at reducer. The installation side of the reducing pipe is shown in the figure, that is, when the front elbow of the inlet flange is downward, the reducing pipe is flat on top; When the elbow is up, the bottom of the reducer is flat.

Site installation display: media from top to bottom

On-site installation display: media from bottom to top

Stainless steel pump inlet should be set up a section of not less than 3 times the pump inlet pipe diameter long straight pipe section, large pump should be 7 times the pump inlet pipe diameter above the straight pipe section, in order to make the liquid smoothly into the pump, avoid deflection and rotating flow, cause pump vibration and noise.

Stainless steel pump piping for the upper suction, do not have to consider the suction inlet requirements of the straight pipe section. Vertical pipe can be directly connected to the suction pipe mouth through elbow and reducing pipe, as short as possible.

When the inlet and outlet of the centrifugal pump are on the same vertical surface, in order to facilitate the installation of the valve, the inlet and outlet can be used to increase the distance between the inlet and outlet pipes by eccentric reducing pipe or two 45° elbow.

Pump outlet and deep protection pipeline design:

Pump outlet should not be directly connected to the elbow. Drain valve between the cut-off valve and check valve at the pump outlet. The pump outlet pressure gauge is installed on the nipple between the pump port and check valve, and can also be installed on the outlet reducer. Pressure gauge nozzle should have a root valve, pressure gauge head toward the operating surface.

Protection pipeline of pump -- pre-hot wire: when the temperature of pre-hot wire conveying medium is greater than 200℃, to avoid the rapid influx of high-temperature liquid into the pump to be operated when switching hot oil pump. So that the pump body, impeller heat uneven damage or deformation, resulting in the fixed part and rotating part of the stuck phenomenon, so that the need to set up a pre-hot line, so that the outage of the pump to maintain the starting state, in order to switch at any time.

The protection pipeline of the pump

small flow line: when the working flow of the pump is less than 30% of the rated flow of the pump, it will produce a force perpendicular to the axis - radial thrust. Moreover, because the pump operates at low efficiency, the liquid temperature of the inlet part rises high, the steam pressure increases, and cavitation is easy to occur. In order to prevent cavitation, the small flow line should be set up for the normal operation of the pump at the lowest flow rate.

Pump protection pipeline

balance line: for conveying liquid in bubble point state under normal temperature saturated steam pressure high dry atmospheric pressure liquid, in order to prevent the liquid into the pump to produce steam or bubble into the pump to cause cavitation, generally appropriate balance line. The balance line is the gas phase from the pump inlet to the suction tank (tower).

Pump protection pipeline

Bypass line: start the high lift pump, the outlet valve unilateral pressure is too large, not easy to open, if forced to open, there will be damage to the valve stem, valve seat risk. A bypass line with a limited orifice plate is set before and after the outlet valve for easy opening. At the same time, the bypass line can reduce the vibration and noise of the pipeline.

Pump inlet and outlet pipeline design最先出现在Pumps & Couplings。

Couplings are the most commonly used connecting part in shaft system transmission of mechanical products.

Its function is to connect the two axes to rotate together to transfer torque and motion. The relative displacement of two connected axes is compensated to improve the transfer dynamic characteristics.
The scope of application covers many fields. Variety, large use. With the progress of science and technology, the types of mechanical products increase, and the performance of continuous improvement. In order to adapt to different working conditions, the coupling with different characteristics is required to achieve the desired effect.

Couplings function

Machine consists of four main parts: power machine - transmission - working machine - controller.
Coupling is used to connect the two shafts or shafts and the rotating body, in order to transfer motion and torque as the basic function of the general parts.

Coupling (Figure 1-1) two half couplings. 1 and 2 are fixedly mounted on the main and driven shafts with shaft hub connection.
Fittings 3, 4, 5, 6 (rigid body, elastomer) connect the two semi-couplings. Rigid coupling and flexible coupling.

The former only connects two shafts to transfer motion and torque, and does not have other functions. With metal or non-metallic elastic element connecting two and a half coupling, respectively called flexible coupling with metal elastic element non-metallic flexible coupling of elastic element. They take advantage of deformation of the elastic element to compensate for the relative offset of two axis, at the same time with different degree of shock absorption, buffer, and improve the function of the transmission system operating characteristics. Can play the role of overload safety protection is called safety coupling. All couplings can be joined or separated only by assembly and disassembly under shutdown.

Figure 1-1 Limited flexible diaphragm coupling

1/2: main/driven half coupling 5: middle segment 3/4: input/output end sheath 6: diaphragm, bolt group
In order to facilitate the design and selection of coupling, China has formulated GB/T12458-2003 "mechanical coupling classification" national standard. According to the classification standard, its classification has the following five levels:

1) Category: couplings are divided into four categories according to whether they have the compensation function and safety protection function of relative offset of two axes.
2) Group: the coupling is divided into three groups according to the relative offset principle of compensating two axes.
3) variety: the coupling is divided into varieties and named according to different working principles, structures, materials and characteristics. For example: gear coupling, diaphragm coupling, tire coupling…
4) Form: according to the connection, installation, matching, safety, lubrication and other needs of the same kind of coupling structure under the premise of the same, from the basic type of different forms.
5) Specifications: according to the size of the coupling and the nominal torque Tn that it can transfer for a long time, order by Arabic numbers from small to large. Their categories, groups, varieties and models are coded with their Chinese phonetic alphabet.

Couplings function最先出现在Pumps & Couplings。

Among, 1 is the model and name of the couplings; 6 is the standard number; The middle numerator and denominator are respectively marked with the corresponding code and size of the main and driven end; 2. Mark shaft hole form code; 3 marked keyway form code; 4 mark shaft hole diameter; 5 mark shaft hole matching length; If the shaft hole and keyway form and size of the main and driven ends are the same, only one end is marked in the center, and the other end is omitted. Y type shaft hole, A type keyway code omitted in the mark is not written.

• If it is rectangular spline hole connection: 2, 3 and 4 are marked according to the requirements of GB/T1144-2001 Rectangular spline;
• If it is cylindrical straight gear spline connection: 2, 3, 4 according to GB/T3478.1-1995 provisions mark;
• Expansion sleeve connection: 2, 3, 4 according to JB/T7934-1999 provisions mark;
• Hydraulic handling connection: 3 is not marked because there is no keyway.

Example 1: UL5 tyre coupling active end: Y-type shaft hole, A-type keyway, D1 =28mm, L=62mm. Driven end: J1 axle hole, B keyway, D2 =32mm, L=60mm.

Example 2: CIICL4 drum gear coupling driving end: cylindrical straight involute spline hole, number of teeth 24, module 2.5mm, 30° flat root, tolerance grade 6, L=107. Driven end: J axle hole, A keyway, D =70mm, L=107mm.

Model in the mark consists of group code, variety code, form code, specification code and specification code;

The nominal torque Tn of the coupling is designed according to the serialization requirements. Each specification couplings long - term transmission of the main parameters. Its specification is in accordance with GB/T321-2005 "Priority number and Priority coefficient" R5, R10, R20;

Values of series 1 [in order of R5 from (0.10 to 1.6) ×106] shall take precedence over those of Series 2 [in order of R10 from (1.0 to 2.0) ×106]. The values of series 2 should take precedence over those of series 3 [arranged R20 from (1.0 to 2.0) ×106].
The nominal torque value shall conform to the provisions of GB/T3507-1983.

Couplings Shaft Hole form and standard

Shaft hole form of the coupling mainly depends on the form and size of the connected shaft. In the selection of coupling, according to the transfer torque size, structure, determine its shaft hole form. The shaft holes shall conform to the shaft extension standards GB/T756-1990, GB/T757-1993, GB/T1569-1990 and GB/T1570-1990.

Shaft hole form and size of the coupling should generally comply with the provisions of GB/T3852-1997.

There are seven types of shaft holes in the coupling:

• They are long cylindrical shaft holes (Y type).
• A short cylindrical shaft hole with a countersunk hole (J type).
• Short cylindrical shaft holes without countersunk holes (type J1).
• Long conical shaft hole with countersunk hole (type Z).
• Long conical shaft hole without countersunk hole (type Z1).
• Short conical shaft hole with countersunk hole (type Z2).
• Short conical shaft holes without countersunk holes (type Z3).

Through this article, you can understand marking method for couplings. This marking method suitable for all of our jaw couplings and gear couplings product.

Attention please:

Marking method for couplings最先出现在Pumps & Couplings。

Couplings used to join the two shafts together. A device that engages or separates a machine after it has stopped running by transmitting motion and torque.This article is mainly about how to choose couplings?

Due to manufacturing and installation errors, deformation after load bearing and the influence of temperature change, the two shafts connected by the coupling can not ensure strict alignment, but there is a certain degree of relative displacement. This requires that when designing the coupling, different measures should be taken from the structure to make it adapt to a certain range of relative displacement.

Couplings Type and usage - How To Choose Couplings Types

1. Fixed couplings (rigid couplings)

Relative displacements between the connected two axes have no compensation ability, so the neutral requirements of the two axes are high. When the two axes have relative displacement, additional loads will be imposed in the structure. The structure of this kind of coupling is relatively simple.

Fixed coupling is the use of fastening bolts to fix the shaft, which is the most traditional, the lowest cost of fixing, but the front end of the bolt and the shaft direct contact. May cause shaft damage and disassembly difficulties.

The most common fixed coupling: sleeve coupling, flange coupling, clamp coupling.

Commonly used fixed coupling: sleeve coupling, clamp coupling.

2. Movable coupling (elastic coupling)

It is mainly used for two shafts with deflection or relative displacement in the work. According to the method of compensating displacement, it can be divided into rigid movable coupling and elastic movable coupling.

2.1 Rigid movable coupling

Rigid movable coupling: compensated by the degree of motion in one or more directions of the dynamic connection formed between the working parts of the coupling.

Common portable rigidity coupling: tooth coupling (allows the axial displacement), cross grooved coupling (used to join two axis parallel displacement or angular displacement is very small), universal shaft coupling (for two axis with oblique Angle or at work have larger angular displacement), gear coupling comprehensive displacement (allow), chain coupling (radial displacement is allowed).

Commonly used rigid movable coupling: cross groove coupling, cross slider coupling, universal coupling.

2.2 Flexible movable coupling

Elastic movable coupling: the deflection and displacement of the two axes are compensated by the elastic deformation of the elastic element, and the elastic element also has the performance of buffering and damping.

Common elastic removable coupling snake spring coupling, radial multi-layer plate spring coupling, elastic ring bolt pin coupling, nylon bolt pin coupling, rubber sleeve coupling, plum coupling, diaphragm coupling and so on.

Commonly used elastic removable coupling: plum coupling, diaphragm coupling.

Fixing method of the coupling

There are several common ways to fix the coupling:

Positioning screw fixation: it is a traditional fixation method to lock the fixed shaft with a gap of 90° between two positioning screws. Because the front end of the screw is in contact with the shaft, it may cause damage to the shaft or difficult to disassemble.

Keyway type: this type is the same as the positioning screw type, which is the most traditional way of fixing. It is suitable for high torque transmission. In order to prevent axial sliding, it is usually used with the positioning screw type and clamping screw type.

Choose process of coupling

Type Selection

4.1 Two-axis alignment:

Strict alignment -- fixed coupling

There is no guarantee of displacement during strict alignment or operation -- flexible coupling

When zero back clearance is required, choose diaphragm type or groove type

When high torque is required, diaphragm type, cross type and plum type are selected

Servo motor with diaphragm type, stepper motor is more groove type

Cross is often used for cylinder or membrane motor occasions, slightly less precision performance (not high requirements)

4.2 Load condition

Load stable or little change -- rigid coupling

Frequent starting brake or load variation - flexible coupling.

4.3 Speed: working speed < the allowable speed of the coupling

Low speed -- rigid coupling

High speed -- flexible coupling

4.4 Environmental conditions

Low ambient temperature (<-20℃) or high (>45℃) should not be used with rubber or nylon as elastic elements of the coupling; Consider mounting dimensions.

4.5 Coupling shaft selection process

According to the load condition, first roughly choose a type.

Calculation of coupling torque (T electrical ≥ T connection).

Determination of eccentricity, allowable size of space and other conditions (eccentricity: angular deviation, axial deviation, radial deviation).

Select the specific model according to the torque size, eccentricity and space allowable size.

Finally determine the size of the shaft holes at both ends (the size of the shaft holes at both ends can be different).

Related products：ML Jaw Flexible Copling

How To Choose Couplings最先出现在Pumps & Couplings。

1: Importance of the pump

Pump and motor coupling connection of two axis rotation center should strictly concentric, coupling must accurately find is when installation, on, or will cause a lot of stress on coupling, and will severely affect the shaft, bearing and shaft on the normal work of the other parts, or even cause the vibration of the whole machine and base or damage, etc. Therefore, the pump and motor coupling is one of the important work links in the process of installation and maintenance.

2: Analysis of the offset jaw shaft coupling

In the installation of the new pump, the verticality between the coupling end face and the axis can not be checked, but the installation of the old pump, must be carefully checked, found not vertical to adjust the vertical alignment. Under normal circumstances, the following four situations may be encountered.

(1) S1=S2, A1 = A2 The end face of the two halves of the back wheel is in the correct position of both parallel and concentric, then the two axes must be located in a straight line.

(2) S1=S2, A1 ≠ A2 The end faces of the two backrest wheels are parallel but the axes are different. In this case. There is a parallel radial displacement between the two axes, e=(A2-A1)/2.

(3) S1≠S2, A1 = A2 Although the end faces of the two halves of backrest wheels are concentric but not parallel. There is angular displacement α between the two axes.

(4) S1≠S2, A1 ≠ A2 The end faces of the two halves of backrest wheels are neither centered nor parallel. There is both radial displacement E and angular displacement α between the two axes.

Coupling in the first condition is that we are looking for the state that the center is striving to achieve. While the second, third and fourth states are not correct, so we need to adjust them to reach the first condition.
In the installation of equipment, the first from the motor (pump) installed, so that the axis is in a horizontal position, and then install the active machine (motor). So when finding the correct only need to adjust the active machine. That is, in the active machine (motor) underfoot surface with adjustment pad surface method to adjust.

3: Find the method of timing measurement and adjustment

The following mainly introduces two commonly used measurement adjustment methods in the maintenance process, which can be divided into different measurement tools:

(1) use knife ruler and feeler gauge to measure the different center coupling. Use wedge clearance rail or feeler gauge to measure the non-parallelism of the end face of the coupling. This method is suitable for low speed and low precision equipment of elastic connection.

(2) Use dial indicator and table frame or special alignment tool to measure the two coupling of different centers and not parallel. This method is suitable for high speed, rigid connection and high precision rotary equipment.

4:Precautions

(1) When using the feeler ruler and knife ruler to find the alignment. Surface of the radial end face of the coupling should be smooth, smooth, rust free and burr free.
(2) In order to see the light of knife shaped ruler, it is best to use a flashlight.
(3) For the final measurement, Foundation bolts of the motor should be completely fastened without loosening.
(4) When using special tools to find the correct, make the same mark. In order to avoid increasing the error of the measurement data, and should be divided into 4-8 points, in order to get accurate data.
(5) Making good records is an important part of correcting.

Above is How to install coupling? If Coupling installation method is not correct, will make pump shaft damage, seal damage. So please do it carefully.

How to install coupling?最先出现在Pumps & Couplings。

A coupling that enables two shafts to be connected at all times during operation.

First: Function

Couplings are usually used to connect two axes and transfer motion and torque between them. It has the ability of absorbing vibration and mitigating impact; Can be used as a safety device to prevent the connected parts from bearing too much load, play the role of overload protection; When the shaft is connected by coupling, the two shafts can only be separated after disassembly when the machine stops running.

Fixed rigid couplings: the center line of the two shafts to be connected is strictly aligned;
Movable coupling: allows a certain amount of installation error between the two shafts.
Elastic jaw coupling: the elastic component materials are different, can compensate the displacement between two axes in a certain range, and the role of buffer shock absorption.Jaw flexible coupling main used in stainless steel gear pumps and water pump, fans....

Due to the influence of manufacturing and installation error, bearing deformation, bearing wear, unbalance of rotary parts and temperature change, the axis of the two shafts connected by the coupling often has some degree of relative displacement and deflection;
Coupling from the structure to take a variety of different measures, so that the coupling has the performance of compensation for various offsets, otherwise it will cause additional load in the shaft, coupling, bearing design, resulting in the deterioration of the working situation.
The types of displacement between two axes are: axial displacement, radial displacement, angular displacement and comprehensive displacement.

Two: Fixed rigid couplings

Structural features

A. Simple structure, convenient maintenance, can transfer large torque;
B. However, it lacks the ability to compensate the relative displacement between the two connected axes;
C. The neutral requirements of the two axes are very high. If the relative displacement of the two axes occurs, additional loads and serious wear will be caused on the shaft, coupling and bearing, seriously affecting the normal operation of the shaft and bearing; In addition, shock and vibration absorption cannot be mitigated during load transfer.

Application scenarios

Low speed, large torque, stable load, short and rigid shaft connection.

Type

Flange coupling and sleeve coupling two kinds.

Structural characteristics of flange couplings

A. Composition: two semi-couplings with flanges and A set of bolts;

B. Working principle: two flanged semi-couplings are connected at two shafts respectively by keys, and then the two semi-couplings are connected together by bolts to transfer motion and torque.

C. Centering method: 1. Centering is carried out by the mutual chiming of the two half couplings with convex shoulders and grooves respectively, and the half couplings are connected by ordinary bolts; (The torque is transferred by the friction generated by the pretightening of the ordinary bolt on the flange edge contact surface; Centering with reamed hole bolts and relying on screw to bear extrusion and shear transfer torque. 2. The two half couplings are made of convex shoulders, which are matched with a split ring to achieve alignment.

D. Applicable: low speed, large torque, stable load, short and good rigidity shaft connection.

E. Simple structure, large transmission torque; Reliable force transmission, good to neutral; Easy to disassemble and assemble, widely used; But it has no displacement compensation function; According to the standard selection.

Structural characteristics of sleeve couplings

A. Composition: the two shafts are connected by keys or pins through A common sleeve.
B. Advantages: simple structure, convenient manufacturing, low cost, small radial size.
C. Disadvantages: Axial movement is required when assembling and disassembling.
D. Application occasions: small diameter of two axes, high accuracy of two axes to neutral, smooth operation occasions, used for small torque transfer occasions.

Flexible couplings

Types of rigid movable coupling (inelastic element coupling) : cross slider coupling, universal coupling and drum type gear coupling.

1.Gear couplings

A. Composition: two outer sleeves with inner teeth and flange, two inner sleeves with outer teeth;
B. Working principle: the two inner sleeves are connected with the two shafts respectively by keys, and the two outer sleeves are connected by bolts. Torque and motion are transmitted through the meshing of the inner and outer teeth.

C. Features: In order to compensate the relative displacement of the two axes, the tooth of the outer tooth ring is made into a drum tooth, and the tooth tip is made into a sphere on the axis with the center line, and a large gap is left between the tooth tip and tooth side.
Through the top clearance and side clearance between the meshing teeth, it has the function of allowing radial, axial and angular comprehensive displacement compensation between the two axes. High speed (up to 3500r/min), can transfer a large torque (up to 106N·m), and can compensate for a large comprehensive displacement, high work, the installation accuracy is not high, to lubrication;
D. Disadvantages: large quality, difficult manufacturing, high cost.
E. Application: Widely used in automobiles and other large heavy machinery equipment.

2.Oldham couplings

A. Structure features: it is connected by half shaft coupling device 1, 3 (left and right sleeve) and floating disk 2 (cross slider), and the two shafts rotate together; The tenon of the floating disk can slide in the groove of the semi-coupling; The friction is large and should be lubricated.
B. Advantages: small radial size, simple structure
C. Disadvantages: but poor impact resistance, easy friction damage between the slider and the groove, need lubrication; Because of the radial displacement of the cross slider, a large centrifugal inertia force will be generated, which will bring additional loads to the shaft and bearing.
D. Application: usually used for large rigidity, low speed, small impact occasions.

3.Universal coupling

A. Structure: composed of A cross shaft, two universal joint forks and four needle bearings; The center of rotation (axis) of all rotation pairs intersects at a point O, and the Angle between the two axes is α. It is a device (coupling) used to transfer the motion between two intersecting axes of variable Angle.

B. Working principle: When axis I rotates once, axis II will also rotate once, that is, the average transmission ratio of the two axes is 1; However, the instantaneous transmission ratio of the two axes is not constant 1, but changes periodically. This characteristic of universal joint is called instantaneous transmission ratio nonuniformity;

For a single universal joint, when there is an included Angle between the input axis and the output axis, the angular velocity of the two axes is not equal, that is, the universal joint has unequal velocity. The larger the included Angle α between the two axes, the more obvious the velocity fluctuation of the driven axis. Therefore, α should be between 35° and 45°. In order to prevent the main and driven axis angular velocity is not equal; In order to completely eliminate the shortcomings of the driven shaft variable speed transmission in the universal joint, it is often used in pairs.

C. Advantages: With large angular compensation capacity, compact structure, high transmission efficiency;

D. Disadvantages: Additional dynamic load will be generated in the transmission, the speed should not be too high;

Commonly used elastic couplings has two kinds

1. Elastic sleeve pin bush coupling (Standard No. Gb423-2002)
   A. Structure: similar to flange coupling in structure, except that the connecting bolt is replaced by A cancellation covered with rubber elastic sleeve;
   B. Principle: using the elastic deformation of the elastic sleeve to compensate the relative displacement of the two axes;
   C. Features: the elastic sleeve pin coupling is easy to manufacture, convenient assembly and disassembly, low cost, but the elastic sleeve is easy to wear, short life.
   D. Suitable for: steady load, positive and negative rotation or start frequently, high speed transmission of small and medium torque of the two axis connection.

• 2.Elastic pin coupling
• A. Structure: A number of non-metallic material pin, placed in the flange hole of the two half coupling, and realize the connection of the two half coupling; The pin material is usually nylon, and other non-metallic materials with elasticity are also available.
• B. Principle: The elastic deformation of the elastic pin is used to compensate the axial displacement of the two axes;
• C. Features: Elastic pin coupling can allow large axial movement, but the compensation of radial displacement and angular displacement is small. Its structure is simple, easy to manufacture and easy to maintain.

Basic knowledge of couplings最先出现在Pumps & Couplings。

1. Boring gear coupling shaft sleeve hole, cutting and dressing of keyway.
2. Rough machining of upper teeth of inner and outer ring and finishing of teeth.
3. Drilling holes and reaming holes on the flanges of the two inner gear bushings.
4. Check the balance of coupling.
   The boring and keyway machining of the gear coupling is the same as that of the flange coupling, and then the end face and other surfaces are machined.

I: Gear processing method

GIICL Gear coupling gear processing is according to its structure, shape and workshop equipped with machine tools and other conditions. Decide what method to use processing. gear processing methods such as some in the universal milling machine milling gear processing. Some hobbing machine gear processing, and in the slotting machine gear processing. Usually, the outer teeth are processed by milling or hobbing, and the inner teeth are processed by shaper.
gear processing is a complex special technology, processing is correct or not. Inner and outer gear indexing circle center line and axis center line concentricity and gear contact is important. In order to improve the precision of the gear, the gear should be shaved. Surface gear is generally subjected to surface hardening heat treatment such as quenching, which can improve the hardness of the working surface, but also maintain good impact toughness inside the gear gear.

After quenching, the gear will inevitably deform and reduce the precision of the gear. Surface hardness gear is very high, so we can only use honing, grinding or grinding to improve the precision. At present, gear coupling widely used in high speed rotating machinery requires high machining accuracy of teeth.

II:Processing method of bolt hole

After gear is processed, the bolt hole can be drilled on the flange of the inner gear shaft sleeve. Then two inner gear shaft sleeve flanges are connected together to ream bolt hole, and check match of the bolts used in coupling, generally for the transition match. After processing, should do a good job of the coupling between the parts of the mark. Of course, some coupling manufacturers, in order to adapt to the requirements of batch production, not the coupling flange pair drilling, hinged. But to the sample mold as the benchmark, with bolt hole flange connection, this method is called drilling.

III:Dynamic balance test requirements

Gear couplings used for high speed machinery, must carry out the balance of the coupling inspection, so in the gear coupling after processing, to carefully do the static balance test and the overall dynamic balance test.

Dynamic balance test is to set the coupling on a special mandrel, the manufacturing accuracy of the mandrel and the surface finish of the journal must meet the specified requirements. Unbalance phenomenon of the coupling is generally used to eliminate the weight method.

Finally, the most important point in full gear coupling or half gear coupling processing is to ensure that the center line of the shaft sleeve hole of the coupling and shaft center line high concentricity. Ensure that the end face and shaft center line vertical. In this way, after coupling is aligned, center line of the two shafts can also be aligned.

Gear coupling processing main process最先出现在Pumps & Couplings。