WO2023165297A1

WO2023165297A1 - Single-bearing electrical generator installation and adjustment method

Info

Publication number: WO2023165297A1
Application number: PCT/CN2023/074269
Authority: WO
Inventors: 吴永强; 徐志远; 李庆强; 孔祥花; 王春英; 王聪聪; 陈轲; 王利; 刘赵强; 高瑞英
Original assignee: 潍柴动力股份有限公司
Priority date: 2022-03-04
Filing date: 2023-02-02
Publication date: 2023-09-07
Also published as: CN114552860A

Abstract

A single-bearing electrical generator installation and adjustment method, the method comprising: hoisting a generator and adjusting the position of the generator, such that a fitting end of a generator coupling is engaged with a fitting end of a flywheel, and a fitting end of a generator cover is engaged with a fitting end of a flywheel cover; pre-installing a generator coupling bolt, uniformly arranging at least four strain gauges on the outer peripheral surface of the flywheel housing in the circumferential direction, keeping the posture of the generator and making the generator to be seated on a chassis; allowing an end face of the generator cover to be in contact with an end face of the flywheel cover, and adjusting the position of the generator so that deformation parameters of the flywheel housing measured by all the strain gauges are consistent; connecting the generator cover and the flywheel cover, fastening the coupling bolt, and dismounting the strain gauges.

Description

Installation and adjustment method of single bearing generator

This application claims the priority of the Chinese patent application with the application number 202210212626.3 and the title of the invention "A Method for Installing and Adjusting a Single Bearing Generator" filed with the China Patent Office on March 4, 2022, the entire contents of which are incorporated herein by reference Applying.

technical field

The present application relates to the field of installation and adjustment of engine accessories, for example, to a method for installation and adjustment of a single-bearing generator.

Background technique

The generator shaft of a single-bearing generator has only one bearing at the rear end, and the front end is connected to the engine flywheel through a disc coupling. The rear-end bearing of the diesel engine plays the role of carrying the main shaft of the generator, and at the same time, the generator casing is directly connected with the flywheel casing, connecting the engine and the generator as a whole.

Due to the influence of the structure during the assembly of the engine and the single-bearing motor, the generator casing and flywheel casing are likely to interfere with various equipment, which makes it impossible to use alignment equipment such as laser alignment instruments and dial gauges. In order to ensure that the engine and power generation Keep good alignment during engine assembly to avoid eccentricity. The current adjustment method for large-bore engines is to use a feeler gauge or a micrometer to measure the gap difference between the generator casing and the end face opening of the flywheel casing in the upper and lower directions, and calculate the increase or decrease of the motor support according to the gap. The thickness of the shim.

However, during the centering installation process, it is necessary to measure the gap between the two end faces of the flywheel housing and the generator casing. The space is narrow and it is inconvenient to measure; It takes a long time to repeatedly disassemble and assemble the flywheel casing and the generator casing fastening bolts and adjusting gaskets.

Contents of the invention

This application provides a method for installation and adjustment of a single-bearing generator, which eliminates the method of measuring the gap between the two end faces of the flywheel housing and the generator housing with a feeler gauge, and measures the flywheel housing and the generator housing by setting strain gauges in the circumferential direction of the flywheel housing. The deformation of the flywheel housing when the two end faces are in contact, and the uniform distribution of the gap is determined according to the consistent deformation of the flywheel housing in all directions under the abutting state, which is convenient for centering operations in a narrow space and improves the efficiency of installation and adjustment.

An embodiment provides a method for installation and adjustment of a single-bearing generator, including:

Lift the generator and adjust the position of the generator so that the seam of the generator coupling is connected with the seam of the flywheel, and the seam of the generator casing is docked with the seam of the flywheel housing;

Coupling bolts are pre-installed, and at least four strain gauges are evenly arranged in the circumferential direction of the outer peripheral surface of the flywheel shell to keep the generator posture and seat on the chassis; make the end face of the generator cover contact the end face of the flywheel shell, and adjust the position of the generator so that all strain gauges The deformation parameters of the flywheel shell measured by the sheet are consistent;

Connect the generator casing and the flywheel housing, tighten the coupling bolts, and remove the strain gauges.

Optionally, the strain gauges are arranged in pairs, and each pair of strain gauges corresponds to two ends of a diameter of the flywheel housing.

Optionally, the strain gauge is attached to the outer peripheral surface of the flywheel housing and is configured to measure axial deformation of the flywheel housing.

Optionally, hoisting the generator and adjusting the position of the generator so that the joint of the generator coupling is docked with the flywheel joint, and the joint of the generator casing is docked with the flywheel casing includes: Keep the axis of the generator horizontal and hoist, match the installation hole on the generator coupling with the guide pin of the flywheel, and adjust the position of the generator so that the seam of the generator casing is docked with the seam of the flywheel shell.

Optionally, when the coupling bolts are pre-installed, in the hoisting state of the generator, after at least two coupling bolts are penetrated, the guide pin is removed, and all the coupling bolts are penetrated, and the coupling bolts are loosely installed.

Optionally, along the ring upward, the first installed coupling bolts are arranged at intervals from the guide pins.

Optionally, when the generator is seated, the gap between each mounting bracket of the generator and the chassis is measured, and gaskets are installed according to the size of each gap.

Optionally, after the generator is seated, an adjustment assembly is installed, and the installation adjustment assembly is configured to drive the generator to adjust the relative position between the generator and the engine.

Optionally, the adjusting assembly is a top screw bolt, and the top screw bolt is arranged between the generator and the chassis and located on both sides of the generator axis.

Optionally, the making the end face of the generator casing contact the end face of the flywheel casing, and adjusting the position of the generator so that the deformation parameters of the flywheel casing measured by all the strain gauges are consistent, includes: making the end surface of the casing of the generator abut against the end surface of the flywheel casing, And according to the deformation parameters of the flywheel housing measured by the strain gauges, the position of the generator is adjusted until the deformation parameters of the flywheel housing measured by the strain gauges tend to be consistent.

Optionally, when adjusting the position of the generator according to the deformation parameters measured by the strain gauges, the thickness of the gasket is adjusted according to the change of the gap between the generator and the chassis.

Optionally, when the deformation parameters measured by all the strain gauges are consistent, the main shaft and coupling of the generator are aligned with the flywheel, and the housing of the generator is aligned with the flywheel housing.

The installation and adjustment method of single bearing generator provided by this application:

(1) In view of the problem of low efficiency and inconvenient operation when the feeler gauge measures the gap between the two end faces of the flywheel housing and the casing of the generator, the flywheel housing and the generator are measured by setting strain gauges in the circumferential direction of the flywheel housing. The deformation of the flywheel housing when the two end faces of the housing are in contact, and the uniform distribution of the gap is determined based on the consistent deformation of the flywheel housing in all directions under the contact state, which is convenient for centering operations in a small space and improves the efficiency of installation and adjustment.

(2) The deformation of the engine flywheel housing is measured by the strain gauge, and the attitude of the generator is determined by measuring the parameters by the strain gauge, so that the attitude of the generator is adjusted according to the reading change, and the height of the support gasket of the generator is changed to achieve fast and accurate Adjustment.

(3) Measure the deformation of the flywheel housing when the flywheel housing is in contact with the generator housing, which is the same as the state when the flywheel housing and the generator housing are fastened by bolts. Under this state, adjust the attitude to meet the alignment need It avoids the traditional problem of deviation caused by the movement of the generator caused by fastening the bolts after the gap measurement. After the adjustment is completed, the tightening will not cause a secondary change to the position of the generator, which reduces repeated adjustments caused by unqualified gaps. The problem.

(4) Use the strain gauges to obtain the deformation of the flywheel housing. When the deformation parameters acquired by the strain gauges at multiple positions are consistent or within the allowable range of error, the end face of the flywheel housing and the end face of the generator casing are closely attached and centered , and, according to the comparison of the parameters measured by the strain gauges at different positions, the pressure situation at the corresponding position can be obtained, and the deviation of the attitude of the generator can be obtained, so as to facilitate the adjustment of the attitude of the generator.

Description of drawings

Fig. 1 is a schematic diagram of installation and adjustment of a single-bearing generator provided by an embodiment of the present application.

In the figure: 1. Gasket, 2. Strain gauge, 3. Engine, 4. Chassis, 5. Generator.

Detailed ways

As shown in Figure 1, a schematic diagram of the installation and adjustment of a single-bearing generator is given.

The installation and adjustment method of the single-bearing generator is set to install the single-bearing generator 5 on the diesel engine to achieve good alignment during the assembly process of the single-bearing generator 5 and the diesel engine, to avoid eccentricity, and to ensure that the main bearing bushes of the engine 3 are evenly stressed and The reliability of the connection between the engine 3 and the generator 5, the generator 5 obtains power from the diesel engine to generate electricity.

The traditional single-bearing generator 5 is installed through the following steps:

Hoist the generator 5 and center the stop: use the adjustable soft rope to hoist the generator 5, slowly hoist the generator 5 and the engine 3 in pairs, move the generator 5 to a certain position, and make the generator 5 disc coupling The guide pin on the mounting hole is centered with the flywheel. If there is interference, the adjustable rope can be used to adjust the levelness to ensure that the generator 5 is smoothly put into the flywheel guide pin. Finally connect the disc coupling spigot to the flywheel spigot.

Install the fastening bolts of the flywheel: When the generator 5 is hoisted, insert the two fastening bolts of the disc coupling, Make it 90 degrees to the guide pin. Then remove the guide pin, pass through all the bolts, and the bolts are loose.

Coarse adjustment of the generator 5 height direction: measure the gap between each mounting bracket of the generator 5 and the chassis 4, adjust the gasket 1 according to the increase or decrease of the gap, and then loosen the lifting rope of the generator 5 to make the unit sit on the chassis 4. Simultaneously install jackscrew bolts, load onto the jackscrew bolts of generator 5 left and right directions (facing the flywheel end), and generator 5 left and right directions are limited.

Loosen the casing fastening bolts of generator 5: Loosen the fastening bolts of the casing fixing generator 5 in order; first loosen the top bolts, then loosen the bottom bolts, and finally loosen the bolts on both sides. damage the flange.

Determine the thickness of the shim 1: Use a feeler gauge or a micrometer to measure the gap H between the casing of the generator 5 and the end face opening of the flywheel shell in the upper and lower directions (the upper gap h2 and the lower gap h1), and calculate the amount of pads that should be increased or decreased for the motor support according to the gap Thickness t of sheet 1 .

t=sin(arctanH/φ)*S

Among them: H is the gap difference in 90° direction; φ is the diameter of the seam of the flywheel housing; S is the distance between the bolt hole at the rearmost end of the generator 5 support and the end face of the generator 5 casing.

Adjust the centering gap: use the jackscrew bolts on the generator 5 bracket to adjust the height of the generator 5, increase or decrease the spacer 1 to ensure that the gap between the end face of the flywheel housing and the housing of the generator 5 is even.

Centering gap measurement: measure the gap between the two end faces of the flywheel casing of the engine 3 and the casing of the generator 5 (the gap between the two planes should be within 0.1mm). If the requirements are not met, please repeat the above steps of adjusting the centering gap and measuring the centering gap until the requirements are met, and record the measured gap value.

The above-mentioned installation and adjustment process of the single-bearing generator 5 and the diesel generator 5 requires multiple measurements of the gap between the two end faces of the flywheel housing and the housing of the generator 5, which is difficult to operate in a narrow space.

At the same time, when the gap after adjustment is unqualified, it is necessary to repeat loosening, tightening and adjustment work, Resulting in low installation and adjustment efficiency.

In an embodiment provided by the present application, a fast and efficient installation and adjustment process of the single-bearing generator 5 is realized through a single-bearing generator installation and adjustment method, including the following steps:

Lift the generator 5 to make and adjust the position of the generator 5 so that the coupling seam of the generator 5 is docked with the flywheel seam, and the housing seam of the generator 5 is docked with the flywheel housing seam;

Coupling bolts are pre-installed, and at least four strain gauges 2 are evenly arranged circumferentially on the outer peripheral surface of the flywheel housing to maintain the posture of the generator 5 and seat on the chassis 4;

The end face of the casing of the generator 5 contacts the end face of the flywheel housing, and the position of the generator 5 is adjusted so that the deformation parameters of the flywheel housing measured by all the strain gauges 2 are consistent;

Connect the casing of the generator 5 and the flywheel housing, fasten the coupling bolts, and remove the strain gauge 2.

When the flywheel housing and the cover of the generator 5 are in contact state, the strain gauge 2 is used to measure the deformation of the flywheel housing, which is the same as the state when the flywheel housing and the cover of the generator 5 are fastened by bolts, and the attitude adjustment is performed in this state To meet the alignment requirements, the problem of deviation caused by the movement of the generator 5 caused by the tightening of the bolts after the traditional gap measurement is avoided. After the adjustment is completed, the tightening will not cause a secondary change to the position of the generator 5, reducing the gap. The problem of repeated adjustment caused by qualification.

Exemplarily, referring to FIG. 1 , the installation and commissioning process is carried out step by step.

Hoist the generator 5 and center the stop: use the adjustable soft rope to hoist the generator 5 so that the generator 5 is hoisted horizontally, keep the axis of the generator 5 horizontal for hoisting, and slowly hoist the generator 5 and the engine 3 in pairs; Generator 5 moves to a certain position, so that the installation hole on the disc coupling of generator 5 is aligned with the guide pin on the flywheel. If there is interference, the adjustable rope can be used to adjust the level to ensure that generator 5 is smoothly placed into the flywheel guide in sale;

Connect the opening of the disc coupling connected to the generator 5 with the opening of the flywheel; continue to move the generator 5 slowly and smoothly, so that the opening of the cover of the generator 5 is gradually installed into the opening of the flywheel shell, and the flywheel shell and the flywheel shell Generator 5's The two end faces of the casing are facing each other.

Install strain gauges 2: strain gauges 2 are arranged in pairs, and each pair of strain gauges 2 corresponds to both ends of a diameter of the flywheel housing; strain gauges 2 are attached to the outer peripheral surface of the flywheel housing to measure the axial deformation of the flywheel housing;

In this embodiment, four strain gauges 2 are selected. Along the direction toward the end surface of the flywheel housing, the strain gauges 2 are arranged on the top, bottom, left and right ends of the outer peripheral surface of the flywheel housing, and the deformation at the corresponding positions is measured; The strain gauge 2 is connected to the strain parameter acquisition module, and the parameters measured by the strain gauge 2 are read to characterize the contact state between the generator 5 and the engine 3, so as to facilitate the adjustment of the generator 5; at the same time, optionally, Increase the number of strain gauges 2, for example, to eight, and still distribute them in pairs to ensure the accuracy of the measured data.

Install the flywheel fastening bolts: in the hoisting state of the generator 5, penetrate the two disk coupling fastening bolts so that they are at 90 degrees to the guide pins; then remove the guide pins, penetrate all the bolts, and install the bolts loosely;

In this embodiment, when the coupling bolts are pre-installed, at least two coupling bolts are penetrated under the hoisting state of the generator 5, the guide pins are removed and all bolts are penetrated, and the bolts are loosely installed; The installed coupling bolts and guide pins are arranged at intervals; ensure the connection effect of the installed coupling bolts to the coupling, maintain the butt joint position of the coupling, and at the same time prevent the installed coupling bolts from causing any damage to the guide pins that need to be removed. put one's oar in.

Coarse adjustment of the generator 5 height direction: measure the gap between each mounting bracket of the generator 5 and the chassis 4, adjust the gasket 1 according to the increase or decrease of the gap, and then loosen the lifting rope of the generator 5 to make the unit sit on the chassis 4; 5. After being seated, install the adjustment assembly and set it to drive the generator 5 to adjust the relative position of the generator 5 and the engine 3;

In this embodiment, the adjustment assembly is a top screw bolt, which is arranged between the generator 5 and the chassis 4, and is respectively located on both sides of the axis of the generator 5; 5 The top screw bolts in the left and right directions limit the left and right directions of the generator 5, and can be adjusted by adjusting the top screw bolts Adjust the left and right positions; the top screw bolts below the generator 5 limit the vertical direction of the generator 5, and the up and down position of the generator 5 can be adjusted by adjusting the top screw bolts; at the same time, it is also possible to set Jackscrew bolts for adjustment along the front and rear directions of the axis.

Determine the thickness of the adjusting gasket 1: adjust the top screw bolt according to the deformation of the upper and lower strain gauges 2, so that the deformation measured by the strain gauge 2 on the flywheel shell is consistent, and increase or decrease the thickness of the motor support gasket 1 according to the adjustment situation;

In this embodiment, the end face of the casing of the generator 5 abuts against the end face of the flywheel housing, and the position of the generator 5 is adjusted according to the deformation state of the flywheel housing measured by the strain gauge 2 so that the deformation parameters of the flywheel housing measured by the strain gauge 2 tend to At the same time, when adjusting the position of the generator 5 according to the parameters measured by the strain gauge 2, adjust the thickness of the gasket 1 according to the change in the gap between the generator 5 and the base.

Finishing: When the parameters measured by all the strain gauges 2 are consistent, the main shaft and coupling of the generator 5 are aligned with the flywheel, and the cover of the generator 5 is aligned with the flywheel shell; after the alignment is completed, the strain gauges 2 are removed.

For the process of adjusting the position of the generator 5 based on the parameters measured by the strain gauge 2, as shown in Figure 1, along the direction toward the end face of the flywheel housing, if the deformation measured by the left strain gauge 2 is greater than that measured by the right strain gauge 2 The deformation amount of the flywheel housing is excessive pressure on the left side of the flywheel housing. Adjust the attitude of the generator 5 so that the tail end of the generator 5 is adjusted to the right, and reduce the pressure of the cover of the generator 5 on the left side of the flywheel housing until the left side and the left side of the flywheel housing The same amount of deformation is measured on the right.

Similarly, if the deformation measured by the strain gauge 2 at the upper end is smaller than the deformation measured by the strain gauge 2 at the lower end, it means that the lower part of the flywheel housing is under excessive pressure. Adjust the attitude of the generator 5 so that the tail end of the generator 5 is adjusted upwards to reduce the The casing of generator 5 is to the pressure of flywheel housing bottom, until the deformation measured at the upper end and the lower end is the same.

Exemplarily, when there is a deviation in the deformation measured by each strain gauge 2, but the deviation is small, it can also be judged that its centering is completed. In this embodiment, the error value is 0.1 mm. In other embodiments, according to For the requirement of medium precision, the error value can be selected to meet the requirement of operation stability.

It should be pointed out that when the difference of the deformation parameter measured by the strain gauge 2 meets the requirements, if the parameter of the overall deformation is small or large, axial adjustment can be performed, that is, the overall deformation can be adjusted to meet need.

Use the strain gauge 2 to obtain the deformation of the flywheel housing. When the deformation parameters acquired by the strain gauge 2 at multiple positions are consistent or within the allowable range of error, the end surface of the flywheel housing and the end surface of the casing of the generator 5 are closely attached and centered , and, according to the comparison of the parameters measured by the strain gauges 2 at different positions, the pressure situation at the corresponding position can be obtained, corresponding to the deviation of the attitude of the generator 5, and the attitude of the generator 5 can be adjusted conveniently.

Claims

A method for installation and adjustment of a single-bearing generator, characterized by comprising:

Lift the generator and adjust the position of the generator so that the seam of the generator coupling is connected with the seam of the flywheel, and the seam of the generator casing is docked with the seam of the flywheel housing;

Coupling bolts are pre-installed, and at least four strain gauges are evenly arranged circumferentially on the outer peripheral surface of the flywheel housing to maintain the attitude of the generator and sit on the chassis;

Make the end face of the generator casing contact the end face of the flywheel housing, adjust the position of the generator so that the deformation parameters of the flywheel housing measured by all strain gauges are consistent;

Connect the generator casing and the flywheel housing, tighten the coupling bolts, and remove the strain gauges.
The installation and adjustment method for a single-bearing generator according to claim 1, wherein the strain gauges are arranged in pairs, and each pair of strain gauges corresponds to two ends of a diameter of the flywheel housing.
The installation and adjustment method for a single-bearing generator according to claim 1 or 2, wherein the strain gauge is attached to the outer peripheral surface of the flywheel housing and is configured to measure the axial deformation of the flywheel housing.
The method for installing and adjusting a single-bearing generator according to claim 1, wherein the generator is hoisted and the position of the generator is adjusted so that the notch of the generator coupling and the notch of the flywheel are docked, and the generator The docking of the seam of the cover and the seam of the flywheel shell includes: keeping the axis of the generator horizontal and hoisting, making the installation hole on the generator coupling fit with the guide pin of the flywheel, and adjusting the position of the generator so that the seam of the generator casing The mouth is connected with the seam of the flywheel housing.
The installation and adjustment method for a single-bearing generator according to claim 4, wherein when the coupling bolts are pre-installed and the generator is hoisted, at least two coupling bolts are penetrated and then the guide pins are removed, and the Insert all coupling bolts, and the coupling bolts are loose.
The method for installation and adjustment of a single-bearing generator according to claim 5, characterized in that, along the ring direction, the first installed coupling bolts are spaced apart from the guide pins.
The installation and adjustment method for a single-bearing generator according to claim 1, wherein when the generator is seated, the gap between each mounting bracket of the generator and the chassis is measured, and gaskets are installed according to the size of each gap.
The installation and adjustment method for a single-bearing generator according to claim 1, wherein after the generator is seated, an adjustment assembly is installed, and the installation adjustment assembly is configured to drive the generator to adjust the relative position between the generator and the engine.
The installation and adjustment method for a single-bearing generator according to claim 8, wherein the adjustment component is a top screw bolt, and the top screw bolt is arranged between the generator and the chassis, and is located on both sides of the generator axis.
The installation and adjustment method for a single-bearing generator according to claim 7, wherein the generator casing end face is in contact with the flywheel casing end face, and the position of the generator is adjusted so that the deformation parameters of the flywheel casing measured by all the strain gauges are consistent, It includes: making the end face of the generator case contact the end face of the flywheel shell, and adjusting the position of the generator according to the deformation parameters of the flywheel shell measured by the strain gauges until the deformation parameters of the flywheel shell measured by the strain gauges tend to be consistent.
The installation and adjustment method for a single-bearing generator according to claim 10, wherein when adjusting the position of the generator based on the deformation parameters measured by the strain gauges, the thickness of the shim is adjusted according to the change in the gap between the generator and the chassis.
The installation and adjustment method for a single-bearing generator according to claim 1, wherein when the deformation parameters measured by all the strain gauges are consistent, the main shaft and coupling of the generator are aligned with the flywheel, and the casing of the generator Align with the flywheel housing.