A method for installing and adjusting a single-bearing generator

Abstract

The present invention provides a single-bearing generator installation and adjustment method, which relates to the field of engine accessory installation and debugging, including: hoisting the generator so that the generator coupling stop is butted against the flywheel stop, and the generator cover stop is butted against the flywheel housing stop; pre-installing coupling bolts, evenly arranging at least four strain gauges in the circumferential direction on the outer circumference of the flywheel housing, maintaining the generator posture and seating it on the chassis; the end face of the generator cover contacts the end face of the flywheel housing, adjusting the generator position so that all strain gauges measure the same deformation parameters of the flywheel housing, connecting the generator cover and the flywheel housing, tightening the coupling bolts, and removing the strain gauges. Aiming at the problem that the current feeler gauge is inefficient and inconvenient to operate when measuring the gap between the two end faces of the flywheel housing and the generator cover for centering, a strain gauge is arranged in the circumferential direction of the flywheel housing to measure the deformation of the flywheel housing when the two end faces of the flywheel housing and the generator cover are butted, so that the centering operation in a small space is facilitated, and the installation and adjustment efficiency is improved.

Description

Technical Field

[0001] The invention relates to the field of engine accessory installation and debugging, and in particular to a single-bearing generator installation and adjustment method. Background Art

[0002] The main shaft of the 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 bearing of the diesel engine plays the role of bearing the main shaft of the generator, and the generator cover is directly connected to the flywheel housing, connecting the engine and the generator into a whole.

[0003] When assembling the engine and single-bearing motor, due to the influence of the structure, the generator cover and flywheel housing are prone to interference with various equipment, making it impossible to use alignment equipment such as laser alignment instruments and micrometers. In order to ensure that the engine and generator are well aligned during assembly and avoid eccentricity, the current adjustment method for large-cylinder engines is to use a feeler gauge or micrometer to measure the gap difference between the generator cover and the end opening of the flywheel housing in the upper and lower directions, and calculate the thickness of the gasket that should be increased or decreased on the motor support based on the gap.

[0004] 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 cover, and the space is small and it is inconvenient to measure. At the same time, if the gap between the two end faces of the flywheel housing and the generator cover is unqualified, it is necessary to repeatedly disassemble and install the flywheel housing and the generator cover fastening bolts and adjust the gaskets, which takes a long time. Summary of the invention

[0005] The purpose of the present invention is to provide a single-bearing generator installation and adjustment method in view of the defects of the prior art, eliminate the method of measuring the gap between the two end faces of the flywheel housing and the generator cover with a feeler gauge, and measure the deformation of the flywheel housing when the two end faces of the flywheel housing and the generator cover are abutted by arranging strain gauges in the circumference of the flywheel housing. The uniform distribution of the gap is determined based on the consistent deformation of the flywheel housing in all directions under the abutment state, which facilitates centering operations in a small space and improves the installation and adjustment efficiency.

[0006] In order to achieve the above objectives, the following scheme is adopted:

[0007] A single-bearing generator installation and adjustment method comprises the following steps:

[0008] Lift the generator and adjust it so that the stop of the generator coupling is butted against the stop of the flywheel, and the stop of the generator cover is butted against the stop of the flywheel housing;

[0009] Pre-install the coupling bolts, evenly arrange at least four strain gauges around the outer circumference of the flywheel housing, keep the generator in position and seat it on the chassis;

[0010] The end face of the generator cover contacts the end face of the flywheel housing. Adjust the position of the generator so that all strain gauges measure the same deformation parameters of the flywheel housing. Connect the generator cover and the flywheel housing, tighten the coupling bolts, and remove the strain gauges.

[0011] Furthermore, the strain gauges are arranged in pairs, and each pair of strain gauges corresponds to two ends of a diameter of the flywheel housing.

[0012] Furthermore, the strain gauge is attached to the outer peripheral surface of the flywheel housing to measure the axial deformation of the flywheel housing.

[0013] Furthermore, the generator axis is kept horizontally hoisted so that the mounting hole on the coupling matches with the flywheel guide pin, and the generator is adjusted so that the stoppers are butted.

[0014] Furthermore, when the coupling bolts are pre-installed, when the generator is hoisted, at least two coupling bolts are inserted, the guide pins are removed, and all the bolts are inserted, and the bolts are loosened.

[0015] Further, upward along the ring, the coupling bolts installed first are spaced apart from the guide pins.

[0016] Furthermore, when the generator is seated, the gaps between the mounting brackets of the generator and the chassis are measured, and gaskets are installed according to the gaps.

[0017] Furthermore, after the generator is seated, an adjustment component is installed to drive the generator to adjust its relative position with the engine.

[0018] Furthermore, the adjustment assembly is a top screw bolt, which is arranged between the generator and the base and on both sides of the generator axis.

[0019] Furthermore, the end face of the generator cover abuts against the end face of the flywheel housing, and the position of the generator is adjusted according to the deformation state of the flywheel housing measured by the strain gauge, so that the deformation parameters of the flywheel housing measured by the strain gauge tend to be consistent.

[0020] Furthermore, when the generator position is adjusted according to the parameters measured by the strain gauge, the thickness of the gasket is adjusted according to the change in the gap between the generator and the base.

[0021] Furthermore, when the parameters measured by all strain gauges are consistent, the generator main shaft, coupling and flywheel are aligned, and the generator cover and flywheel housing are aligned at the same time.

[0022] Compared with the prior art, the present invention has the following advantages and positive effects:

[0023] (1) In order to solve the problem that the current alignment of the gap between the two end faces of the flywheel housing and the generator housing by using a feeler gauge is inefficient and inconvenient to operate, a strain gauge is arranged on the circumference of the flywheel housing to measure the deformation of the flywheel housing when the two end faces of the flywheel housing and the generator housing are in contact. 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 facilitates the alignment operation in a small space and improves the installation and adjustment efficiency.

[0024] (2) The deformation of the engine flywheel housing is measured by strain gauges, and the generator posture is determined by measuring parameters through strain gauges. The generator posture is adjusted according to the reading changes, and the height of the generator support gasket is changed to achieve fast and accurate adjustment.

[0025] (3) The deformation of the flywheel housing is measured when the flywheel housing and the generator cover are in abutment with each other, which is the same as the state when the flywheel housing and the generator cover are tightened with bolts. In this state, the posture is adjusted to meet the centering requirements, avoiding the problem of deviation caused by the movement of the generator due to tightening the bolts after the traditional gap measurement. Tightening after the adjustment will not cause a secondary change in the generator position, reducing the problem of repeated adjustments caused by unqualified gaps.

[0026] (4) The deformation of the flywheel housing is obtained by using strain gauges. When the deformation parameters obtained by the strain gauges at multiple positions are consistent or within the allowable error range, the end face of the flywheel housing and the end face of the generator cover are tightly fitted and aligned. In addition, the pressure conditions at the corresponding positions and the deviation of the corresponding generator posture can be obtained based on the comparison of the parameters measured by the strain gauges at different positions, so as to facilitate the adjustment of the generator posture. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0028] Figure 1 This is a schematic diagram of the installation and adjustment of a single-bearing generator in Example 1 of the present invention.

[0029] In the figure: 1. gasket, 2. strain gauge, 3. engine, 4. chassis, 5. generator. DETAILED DESCRIPTION

[0030] Example 1

[0031] In a typical embodiment of the present invention, Figure 1 As shown, a method for installing and adjusting a single-bearing generator is given.

[0032] like Figure 1The single-bearing generator installation and adjustment method shown is used to install the single-bearing generator 5 on the diesel engine, achieve good alignment between the single-bearing generator 5 and the diesel engine during assembly, avoid eccentricity, ensure uniform force on the main bearing of the engine 3 and the reliability of the connection between the engine 3 and the generator 5, and the generator 5 obtains power from the diesel engine to generate electricity.

[0033] The conventional single-bearing generator 5 is installed by the following steps:

[0034] Lifting generator 5, aligning the stopper: Use an adjustable soft rope to lift generator 5, slowly lift generator 5 and engine 3, move generator 5 to a certain position, align the mounting hole on the disc coupling of generator 5 with the guide pin on the flywheel, if there is interference, use the adjustable rope to adjust the horizontality to ensure that generator 5 is smoothly placed in the flywheel guide pin. Finally, connect the stopper of the disc coupling with the stopper of the flywheel.

[0035] Install the flywheel fastening bolts: With the generator 5 hoisted, insert the two disc coupling fastening bolts so that they are 90 degrees to the guide pin. Then remove the guide pin, insert all the bolts, and loosen the bolts.

[0036] Generator 5 height direction rough adjustment: measure the gap between each mounting bracket of generator 5 and chassis 4, increase or decrease the adjustment gasket 1 according to the gap, then loosen the generator 5 hanging rope to seat the unit on chassis 4. At the same time, install the top screw bolts, install the top screw bolts in the left and right directions of generator 5 (facing the flywheel end), and limit the left and right directions of generator 5.

[0037] Loosen the generator 5 cover fastening bolts: Loosen the generator 5 cover fastening bolts in sequence; first loosen the top bolts, then the bottom bolts, and finally the bolts on both sides. Strictly follow the sequence, otherwise the flange will be damaged.

[0038] Determine the thickness of the adjustment gasket 1: Use a feeler gauge or micrometer to measure the gap difference H between the generator 5 cover and the end opening of the flywheel housing in the upper and lower directions (upper gap h2, lower gap h1), and calculate the thickness t of the gasket 1 that should be increased or decreased on the motor support based on the gap.

[0039]

[0040] Where: H is the gap difference in the 90° direction; is the diameter of the stop of the flywheel housing; S is the distance between the bolt hole at the rear end of the generator 5 bracket and the end face of the generator 5 cover.

[0041] Adjust the centering gap: Use the top screw bolts on the generator 5 bracket to adjust the height of the generator 5, and add or remove gaskets 1 to ensure that the gap between the end face of the flywheel housing and the generator 5 cover is uniform.

[0042] Centering clearance measurement: Measure the clearance between the two end faces of the engine 3 flywheel housing and the generator 5 housing (the clearance between the two planes should be within 0.1mm). If it does not meet the requirements, repeat the above measurement and adjustment steps until it meets the requirements and record the measured clearance value.

[0043] The installation and adjustment process of the single-bearing generator 5 and the diesel generator 5 requires multiple measurements of the gap between the flywheel housing and the two end faces of the engine 3 housing, which is difficult to operate in a narrow space.

[0044] At the same time, when the clearance becomes unqualified after adjustment, it is necessary to repeat the loosening, tightening and adjustment work, resulting in low installation and adjustment efficiency.

[0045] In this embodiment, a single-bearing generator installation and adjustment method is used to achieve a fast and efficient installation and adjustment process of a single-bearing generator 5, including the following steps:

[0046] Lift the generator 5 and adjust it so that the coupling stop of the generator 5 is butted against the stop of the flywheel, and the cover stop of the generator 5 is butted against the stop of the flywheel housing;

[0047] Pre-install the coupling bolts, evenly arrange at least four strain gauges 2 around the outer circumference of the flywheel housing, keep the generator 5 in position and seat it on the chassis 4;

[0048] The end face of the generator 5 cover contacts the end face of the flywheel housing, the position of the generator 5 is adjusted so that all strain gauges 2 measure the same deformation parameters of the flywheel housing, the generator 5 cover and the flywheel housing are connected, the coupling bolts are tightened, and the strain gauges 2 are removed.

[0049] By using strain gauge 2, the deformation of the flywheel housing is measured when the flywheel housing and the generator 5 cover are in abutment state, which is the same as the state when the flywheel housing and the generator 5 cover are tightened with bolts. In this state, the posture is adjusted to meet the centering requirements, avoiding the problem of deviation caused by the movement of the generator 5 due to tightening the bolts after the traditional gap measurement. Tightening after the adjustment will not cause secondary changes to the position of the generator 5, reducing the problem of repeated adjustments caused by unqualified gaps.

[0050] Specific, combined Figure 1 , the installation and debugging process is carried out step by step.

[0051] Lift the generator 5 and center the stopper: Use an adjustable soft rope to lift the generator 5 so that the generator 5 is lifted horizontally, keep the axis of the generator 5 horizontal during lifting, and slowly lift the generator 5 and the engine 3 to align them; move the generator 5 to a certain position so that the mounting hole on the disc coupling of the generator 5 is aligned with the guide pin on the flywheel. If there is interference, the adjustable rope can be used to adjust the horizontality to ensure that the generator 5 is smoothly placed in the guide pin of the flywheel;

[0052] Finally, the stop of the disc coupling connected to the generator 5 is connected to the stop of the flywheel; the motor is moved slowly and smoothly to gradually install the stop of the generator 5 cover into the stop of the flywheel shell, and the two end faces of the flywheel shell and the generator 5 cover are facing each other.

[0053] Install strain gauges 2: strain gauges 2 are arranged in pairs, with each pair of strain gauges 2 corresponding to the two 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;

[0054] In this embodiment, four strain gauges 2 are selected. Along the direction toward the end face of the flywheel housing, the strain gauges 2 are arranged at the top, bottom, left and right ends of the outer peripheral surface of the flywheel housing to measure the deformation at the corresponding positions; the strain gauge 2 can be connected to the strain parameter acquisition module to read the parameters measured by the strain gauge 2 to characterize the contact state between the generator 5 and the engine 3, thereby facilitating the adjustment of the generator 5; at the same time, it can be understood that the number of strain gauges 2 can also be increased, for example, increased to eight, and still distributed in pairs to ensure the accuracy of the measured data.

[0055] Install the flywheel fastening bolts: When the generator 5 is hoisted, insert the two disc coupling fastening bolts so that they are 90 degrees to the guide pins; then remove the guide pins, insert all the bolts, and loosen the bolts;

[0056] In this embodiment, when the coupling bolts are pre-installed, the generator 5 is in a hoisted state, at least two coupling bolts are inserted, the guide pins are removed and all the bolts are inserted, and the bolts are loosened; the coupling bolts installed first are arranged with intervals from the guide pins upward along the ring; the connection effect of the installed coupling bolts on the coupling is ensured, the docking position of the coupling is maintained, and at the same time, the installed coupling bolts are prevented from interfering with the removal of the guide pins that need to be removed.

[0057] Generator 5 height direction rough adjustment: measure the gap between each mounting bracket of generator 5 and chassis 4, increase or decrease the adjustment gasket 1 according to the gap, then loosen the generator 5 hanging rope to seat the unit on chassis 4; after the generator 5 is seated, install the adjustment component to drive the generator 5 to adjust the relative position with the engine 3;

[0058] In this embodiment, the adjustment component is a top screw bolt, which is arranged between the generator 5 and the base and on both sides of the axis of the generator 5; after the top screw bolt is installed, the top screw bolts in the left and right directions of the generator 5 in the direction toward the end face of the flywheel cover limit the left and right directions of the generator 5, and the left and right positions can be adjusted by adjusting the top screw bolts; the top screw bolts below the engine 3 limit the vertical direction of the engine 3, and the up and down positions can be adjusted by adjusting the top screw bolts; at the same time, top screw bolts along the axial direction of the engine 3 can also be set to adjust along the front and rear directions of the axis.

[0059] Determine and adjust the thickness of gasket 1: According to the degree of the upper and lower strain gauges 2, adjust the top screw bolt to make the degree of the strain gauge 2 on the flywheel housing consistent, and increase or decrease the thickness of the motor support gasket 1 according to the adjustment situation;

[0060] In this embodiment, the end face of the generator 5 cover 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 be consistent; at the same time, when the position of the generator 5 is adjusted according to the parameters measured by the strain gauge 2, the thickness of the gasket 1 is adjusted according to the change in the gap between the generator 5 and the base.

[0061] Finishing: When the parameters measured by all strain gauges 2 are consistent, the main shaft, coupling and flywheel of generator 5 are aligned, and the cover of generator 5 and flywheel housing are aligned at the same time; after the alignment is completed, the strain gauge 2 is removed.

[0062] For the process of adjusting the generator 5 according to the parameters measured by the strain gauge 2, as shown in FIG. Figure 1 As shown, along the direction toward the end face of the flywheel housing, if the deformation measured by the left strain gauge 2 is greater than the deformation measured by the right strain gauge 2, the left side of the flywheel housing is over-pressurized. The posture of the generator 5 is adjusted so that the tail end of the generator 5 is adjusted to the right, thereby reducing the pressure of the generator 5 cover on the left side of the flywheel housing until the deformation measured on the left and right sides are the same.

[0063] 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 over-pressurized. The posture of the generator 5 is adjusted so that the tail end of the generator 5 is adjusted upward to reduce the pressure of the generator 5 cover on the lower part of the flywheel housing until the deformation measured at the upper and lower ends are the same.

[0064] It can be understood that there is a deviation in the deformation amount measured by each strain gauge 2, but when the deviation is small, it can also be determined that the centering is completed. In this embodiment, the error value is 0.1mm. In other embodiments, according to the requirements of centering accuracy, the error value can be selected to meet the requirements of operational stability.

[0065] It should be pointed out that when the difference in deformation parameters measured by the strain gauge 2 meets the requirements, if the parameters of the overall deformation are small or large, axial adjustment can be performed to adjust the overall deformation to meet the requirements.

[0066] The deformation of the flywheel housing is obtained by using the strain gauge 2. When the deformation parameters obtained by the strain gauges 2 at multiple positions are consistent or within the allowable error range, the end face of the flywheel housing and the end face of the generator 5 cover are tightly fitted and aligned. In addition, the pressure conditions at the corresponding positions and the deviation of the posture of the generator 5 can be obtained based on the comparison of the parameters measured by the strain gauges 2 at different positions, so as to facilitate the adjustment of the posture of the generator 5.

[0067] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for installing and adjusting a single-bearing generator, characterized in that: The following steps are involved: Lift the generator and adjust it so that the stop of the generator coupling is aligned with the stop of the flywheel, and the stop of the generator cover is aligned with the stop of the flywheel housing; Pre-install the coupling bolts, evenly arrange at least four strain gauges around the outer circumference of the flywheel housing, keep the generator in position and seat it on the chassis; The end face of the generator cover contacts the end face of the flywheel housing, the position of the generator is adjusted so that all strain gauges measure the same deformation parameters of the flywheel housing, the generator cover and the flywheel housing are connected, the coupling bolts are tightened, and the strain gauges are removed; the strain gauges are arranged in pairs, and each pair of strain gauges corresponds to the two ends of a diameter of the flywheel housing; the strain gauges are attached to the outer peripheral surface of the flywheel housing to measure the axial deformation of the flywheel housing.

2. The single-bearing generator installation and adjustment method according to claim 1, characterized in that: Keep the generator axis horizontal when lifting, make the mounting hole on the coupling match the flywheel guide pin, and adjust the generator so that the coupling stop and the flywheel stop are connected.

3. The single-bearing generator installation and adjustment method according to claim 2, characterized in that: When pre-installing the coupling bolts, insert at least two coupling bolts when the generator is hoisted, remove the guide pins and insert all the bolts, and loosen the bolts.

4. The single-bearing generator installation and adjustment method according to claim 3, characterized in that: Going upward along the ring, the coupling bolts installed first are spaced apart from the guide pins.

5. The single-bearing generator installation and adjustment method according to claim 1, characterized in that: When the generator is seated, measure the gap between each mounting bracket of the generator and the chassis, and install the gasket according to the gap.

6. The single-bearing generator installation and adjustment method according to claim 1, characterized in that: After the generator is seated, the adjustment assembly is installed to drive the generator to adjust its relative position with the engine.

7. The single-bearing generator installation and adjustment method according to claim 6, characterized in that: The adjustment assembly is a jackscrew bolt, which is arranged between the generator and the base and on both sides of the generator axis.

8. The single-bearing generator installation and adjustment method according to claim 1, characterized in that: The end face of the generator cover is against the end face of the flywheel housing. According to the deformation state of the flywheel housing measured by the strain gauge, the position of the generator is adjusted so that the deformation parameters of the flywheel housing measured by the strain gauge tend to be consistent.

9. The single-bearing generator installation and adjustment method according to claim 8, characterized in that: When adjusting the generator position according to the parameters measured by the strain gauge, the thickness of the gasket is adjusted according to the change in the gap between the generator and the base.

10. The single-bearing generator installation and adjustment method according to claim 1, characterized in that: When the parameters measured by all strain gauges are consistent, the generator main shaft, coupling and flywheel are aligned, and the generator cover and flywheel housing are aligned at the same time.

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