Guide bearing clearance adjusting device and method for water-turbine generator set

Abstract

The invention discloses a water-turbine generator set guide bearing clearance adjusting device and an adjusting method thereof, and relates to the technical field of water-turbine generator set guide bearing clearance adjusting.The water-turbine generator set guide bearing clearance adjusting device comprises an upper wedge key, a lower wedge key, a connecting plate and a driving screw, the upper wedge key is provided with a first inclined face and a first jacking face, and the lower wedge key is provided with a second inclined face and a second jacking face; the first inclined face and the second inclined face are equal in slope and used for being attached to each other, the first jacking face and the second jacking face are arranged in parallel, the connecting plate is arranged at the end of the upper wedge key and the end of the lower wedge key, and the driving screw is assembled on the connecting plate and connected with the upper wedge key. The driving screw is used for driving the upper wedge key to move relative to the connecting plate so as to adjust the distance between the first jacking face and the second jacking face. The guide bearing clearance adjusting device of the water-turbine generator set can be integrally installed and taken out, accurate adjustment can be conducted according to the guide bearing clearance requirement, operation is convenient and fast, and the guide bearing clearance adjusting efficiency is greatly improved.

Description

Technical Field

[0001] This invention relates to the field of guide bearing clearance adjustment technology for hydro-generator sets, specifically, to a guide bearing clearance adjustment device and adjustment method for hydro-generator sets. Background Technology

[0002] The guide bearing of a hydro-generator is used to stabilize the rotation center of the main shaft. During operation, it bears radial force. An oil film must be formed between the guide bearing and the main shaft journal to transmit force, lubricate, and dissipate heat. If the clearance between the guide bearing and the main shaft is too small, an oil film cannot be formed, causing the bearing to experience semi-dry friction or even burn out due to friction. If the clearance between the guide bearing and the main shaft is too large, the rotation center cannot be stabilized, and the main shaft will have a large runout.

[0003] In related technologies, there are two main methods for adjusting the clearance of the guide bearing shell of a hydro-generator. One method uses a fixed wedge plate. A wedge plate is placed in the keyway of the bearing shell and tightened. The distance between the top of the wedge plate and the support point of the wedge plate is measured. The required lifting height of the wedge plate is calculated according to the bearing clearance distribution value and the slope of the wedge plate. A special shim or sleeve is machined and placed between the wedge plate and the fixed support plate to fix the wedge plate. The other method uses a shim plate of fixed thickness. The wedge plate is used to hold the bearing shell tightly against the bearing housing. The distance between the back of the bearing shell and the normal point of the bearing seat is measured. The bearing clearance distribution value is subtracted from this distance to obtain the thickness of the shim plate. The shim plate is machined according to this thickness and placed in the keyway. The first method requires the machining of special shims or sleeves, and the second method requires the machining of shims of corresponding thickness according to the distribution interval. Both methods require the measurement of relevant dimensional data in the oil groove, which has measurement errors and low adjustment accuracy. When the clearance changes again or there are errors in the machining, the shim plate needs to be remade. The operation is cumbersome, the work efficiency is low, and the labor cost is high. Summary of the Invention

[0004] The present invention aims to at least partially solve one of the technical problems in the related art.

[0005] To address this, this invention provides a guide bearing clearance adjustment device for hydro-generator sets. This device can be installed and removed as a whole, and can be precisely adjusted according to the guide bearing clearance requirements. It is easy to operate and greatly improves the efficiency of guide bearing clearance adjustment.

[0006] This invention also proposes a method for adjusting the clearance of the guide bearing of a hydro-generator set.

[0007] The guide bearing clearance adjustment device for a hydro-generator set according to an embodiment of the present invention includes:

[0008] The upper wedge key and the lower wedge key are provided. The upper wedge key has a first inclined surface and a first supporting surface that are arranged opposite to each other along a first direction. The lower wedge key has a second inclined surface and a second supporting surface that are arranged opposite to each other along a first direction. The first inclined surface and the second inclined surface have equal slopes and are arranged opposite to each other and are used to fit together. The first supporting surface and the second supporting surface are arranged parallel to each other. The first supporting surface is used to press against the bearing support or the bearing bush, and the second supporting surface is used to press against the bearing bush or the bearing support.

[0009] A connecting plate and a driving screw are provided. The connecting plate is disposed at the ends of the upper wedge key and the lower wedge key and is connected to the upper wedge key and the lower wedge key respectively. The driving screw is assembled on the connecting plate and connected to the upper wedge key. The driving screw is used to drive the upper wedge key to move relative to the connecting plate to adjust the distance between the first support surface and the second support surface.

[0010] The guide bearing clearance adjustment device of the hydro turbine generator set in this embodiment of the invention can be installed and removed as a whole, and can be precisely adjusted according to the guide bearing clearance requirements. It is easy to operate and greatly improves the working efficiency of guide bearing clearance adjustment.

[0011] In some embodiments, the connecting plate is provided with a first fixing hole corresponding to the upper wedge key. The first fixing hole is an elongated hole extending along the first direction. The driving screw is fixedly disposed on the upper wedge key. The driving screw passes through and is slidably assembled in the first fixing hole. A first nut and a second nut are threadedly connected to the driving screw. The first nut and the second nut are disposed on both sides of the connecting plate.

[0012] In some embodiments, the connecting plate is provided with a clearance groove on the side near the upper wedge key, and the depth of the clearance groove is not less than the thickness of the second nut or the first nut to accommodate the second nut or the first nut.

[0013] In some embodiments, the connecting plate is detachably connected to the lower wedge key.

[0014] In some embodiments, the size of the upper wedge key in the second direction is not greater than the size of the lower wedge key in the second direction.

[0015] In some embodiments, the connecting plate is provided with measuring holes corresponding to the upper wedge key, and the measuring holes are provided in at least two and are spaced apart along the circumferential direction of the drive screw.

[0016] In some embodiments, the measuring hole is an elongated hole extending along the first direction, and a measuring rod is fixedly provided on the upper wedge key. The measuring rod passes through the measuring hole and is at least partially located on the side of the connecting plate opposite to the upper wedge key. The measuring rod is provided with graduations at intervals, and a display is provided on one side of the graduations. The display is used to show the distance between the side of the connecting plate opposite to the upper wedge key and the end of the upper wedge key, or the distance between the first support surface and the second support surface.

[0017] In some embodiments, the upper wedge key is provided with a first limiting plate extending along a second direction, and the first limiting plate is provided with a second fixing hole, which is an elongated hole extending along the second direction. The lower wedge key is provided with a second limiting plate corresponding to the first limiting plate, and the second limiting plate is provided with a fixing bolt whose position is adjustable along a third direction. The fixing bolt passes through the second fixing hole and is used to drive the first limiting plate to move closer to the second limiting plate to fix the upper wedge key and the lower wedge key.

[0018] In some embodiments, the drive screw is threadedly fitted to the connecting plate, and a slider is rotatably provided at one end of the drive screw near the upper wedge key. A groove is provided at the end of the upper wedge key, and the slider is slidably disposed in the groove and engages with the groove in a second direction perpendicular to the first direction.

[0019] The method for adjusting the guide bearing clearance of a hydro-generator set according to embodiments of the present invention includes the guide bearing clearance adjustment device for a hydro-generator set according to any of the above embodiments, and includes the following steps:

[0020] S1. Place the adjusting device in the keyway of the bearing shell, and adjust the relative positions of the upper wedge key and the lower wedge key by driving the screw. The upper wedge key and the lower wedge key press against the bearing support or the bearing shell so that the bearing shell rests against the shaft.

[0021] S2. Fix the relative positions of the upper and lower wedge keys, remove the adjustment device, measure the distance between the end of the upper wedge key and the top surface of the connecting plate and record it as the initial distance;

[0022] S3. Calculate the lifting height of the upper wedge key based on the slope of the upper wedge key and the distribution amount of the bearing clearance; then adjust the position of the upper wedge key based on the lifting height.

[0023] S4. Check whether the relative position of the upper wedge key to the lower wedge key is adjusted in place. If the adjustment is in place, fix the relative position of the upper and lower wedge keys and install the adjustment device in the keyway of the bearing. If the adjustment is not in place, readjust.

[0024] In some embodiments, during the use of the adjustment device, the adjustment device is taken out, the distance between the end of the upper wedge key and the top surface of the connecting plate is measured and recorded as the initial distance, the adjustment height of the upper wedge key is calculated according to the adjustment amount of the tile gap and the slope of the upper wedge key, the position of the upper wedge key is adjusted according to the adjustment height, and after verifying that the upper wedge key is adjusted in place, the adjustment device is installed.

[0025] In some embodiments, the connecting plate is provided with a first fixing hole, which is an elongated hole extending along the first direction. The driving screw is fixedly disposed on the upper wedge key and passes through and is slidably assembled in the first fixing hole. The driving screw is threadedly connected with a first nut and a second nut disposed on both sides of the connecting plate. When adjusting the position of the upper wedge key, the first nut and the second nut are adjusted in the direction away from the connecting plate, and the driving screw is pressed. The driving screw drives the upper wedge key to move along the second inclined plane in the direction away from the connecting plate.

[0026] In some embodiments, the upper wedge key is provided with a first limiting plate extending in a second direction, the first limiting plate is provided with a second fixing hole extending in the second direction, the lower wedge key is provided with a second limiting plate corresponding to the first limiting plate, the second limiting plate is provided with a fixing bolt that is adjustable in a third direction and passes through the first fixing hole. When fixing the upper wedge key, the first nut and the second nut are screwed on to initially fix the upper wedge key, the fixing bolt is screwed on to make the first inclined surface and the second inclined surface fit together, and the first nut and the second nut are screwed on further to complete the fixing of the upper wedge key.

[0027] In some embodiments, the connecting plate is provided with a measuring hole corresponding to the upper wedge key. The measuring hole is provided with at least two holes and is spaced apart circumferentially along the drive screw. When measuring the distance between the end of the upper wedge key and the top of the connecting plate, the measuring device is partially passed through the measuring hole to stop against the upper wedge key for measurement, and the average value of the data measured by at least two measuring holes is taken as the distance between the end of the upper wedge key and the top of the connecting plate. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of the guide bearing clearance adjustment device of the hydro-generator set according to an embodiment of the present invention.

[0029] Figure 2 This is an installation diagram of the guide bearing clearance adjustment device for a hydro-generator set according to an embodiment of the present invention.

[0030] Figure 3 This is a schematic diagram of the upper wedge key in the guide bearing clearance adjustment device of the hydro-generator set according to an embodiment of the present invention.

[0031] Figure 4 This is a schematic diagram of the lower wedge key in the guide bearing clearance adjustment device of the hydro-generator set according to an embodiment of the present invention.

[0032] Figure 5 This is a schematic diagram of the connecting plate in the guide bearing clearance adjustment device of the hydro-generator set according to an embodiment of the present invention.

[0033] Figure label:

[0034] Adjustment device 100;

[0035] Upper wedge key 1; first inclined surface 11; first top support surface 12; first limiting plate 13; second fixing hole 131;

[0036] 2. Lower wedge key; 21. Second inclined surface; 22. Second top support surface; 23. Second limiting plate; 231. Third fixing hole; 24. Fixing bolt;

[0037] Connecting plate 3; First fixing hole 31; Clearance groove 32; Measuring hole 33;

[0038] Drive screw 4; First nut 41; Second nut 42;

[0039] Bearing support 5; Support plate 51;

[0040] Bearing 6; Limit pin 61. Detailed Implementation

[0041] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0042] like Figures 1 to 5 As shown, the guide bearing clearance adjustment device 100 of the hydro turbine generator set of the present invention includes an upper wedge key 1, a lower wedge key 2, a connecting plate 3 and a drive screw 4. The length direction of the connecting plate 3, that is, the left and right opposite direction, is defined as the first direction, the thickness direction of the connecting plate 3, that is, the up and down direction, is defined as the second direction, and the width direction of the connecting plate 3, that is, the front and back direction, is defined as the third direction.

[0043] The upper wedge key 1 has a first inclined surface 11 and a first supporting surface 12 arranged opposite to each other in the left-right direction. The lower wedge key 2 has a second inclined surface 21 and a second supporting surface 22 arranged opposite to each other in the left-right direction. The slopes of the first inclined surface 11 and the second inclined surface 21 are equal. The first inclined surface 11 and the second inclined surface 21 are arranged opposite to each other and are used to fit together. The first supporting surface 12 and the second supporting surface 22 are arranged in parallel. The first supporting surface 12 is used to press against the bearing support 5 or the bearing bush 6. The second supporting surface 22 is used to press against the bearing bush 6 or the bearing support 5. The connecting plate 3 is provided at the ends of the upper wedge key 1 and the lower wedge key 2 and is connected to the upper wedge key 1 and the lower wedge key 2 respectively. The driving screw 4 is assembled on the connecting plate 3 and connected to the upper wedge key 1. The driving screw 4 is used to drive the upper wedge key 1 to move relative to the connecting plate 3 to adjust the distance between the first supporting surface 12 and the second supporting surface 22.

[0044] In the initial use of the guide bearing clearance adjustment device 100 of the hydro-generator set of this invention, the entire adjustment device 100 is placed in the keyway of the bearing bush 6. The relative positions of the upper wedge key 1 and the lower wedge key 2 are adjusted by the drive screw 4. With the first inclined surface 11 and the second inclined surface 21 in close contact, the upper wedge key 1 and the lower wedge key 2 press against the bearing support 5 or the bearing bush 6 respectively to drive the bearing bush 6 to abut against the shaft, thereby fixing the relative positions of the upper wedge key 1 and the lower wedge key 2. The entire adjustment device 100 is then removed. The distance between the end of the upper wedge key 1 and the top surface of the connecting plate 3 is measured and recorded as the initial distance. The lifting height of the upper wedge key 1 is calculated based on the slope of the first inclined surface 11 of the upper wedge key 1, and the position of the upper wedge key 1 is adjusted by the lifting height. After the adjustment is in place, the first inclined surface 11 and the second inclined surface 21 are made to fit tightly together, fixing the relative positions of the upper wedge key 1 and the lower wedge key 2. The adjustment device 100 is then installed in the keyway of the bearing bush 6.

[0045] When adjustment is required during use, take out the adjustment device 100, measure the distance between the end of the upper wedge key 1 and the top surface of the connecting plate 3 and record it as the initial distance. Calculate the adjustment height of the upper wedge key 1 based on the adjustment amount of the tile gap and the slope of the upper wedge key 1. Adjust the position of the upper wedge key 1 by adjusting the height along the position close to or away from the connecting plate 3. After the upper wedge key 1 is adjusted to the correct position, make the first inclined surface 11 and the second inclined surface 21 fit tightly together and install the adjustment device 100.

[0046] The guide bearing clearance adjustment device 100 of the hydro-generator set in this embodiment of the invention is equipped with a double wedge key structure, so that the contact with the bearing support 5 and the bearing bush 6 is a line contact or surface contact, which increases the stability and reliability of the adjustment device 100 during use. It is movably installed in the oil tank, and can be installed and removed as a whole, so as to facilitate dimensional measurement and adjustment of the upper wedge key 1 outside the oil tank. It is convenient, efficient and accurate to operate. Furthermore, the distance between the first support surface 12 and the second support surface 22 can be adjusted by moving the upper wedge key 1 relative to the lower wedge key 2. It can be reused and adjusted repeatedly, which greatly saves labor costs and improves the efficiency of guide bearing clearance adjustment.

[0047] It should be noted that, as Figure 2 As shown, a support plate 51 is provided on the bearing support 5 corresponding to the bearing bush 6. Two limiting pins 61 are provided circumferentially on the side of the bearing bush 6 near the support plate 51. The two limiting pins 61 are fixed on both sides of the support plate 51 to limit the bearing bush 6. A keyway for the installation of the adjustment device 100 is formed between the bearing bush 6, the limiting pins 61 and the support plate 51.

[0048] In some embodiments, such as Figure 1 As shown, the connecting plate 3 is detachably connected to the lower wedge key 2 by bolts or screws and other connecting parts. During the use of the adjusting device 100, the upper wedge key 1 and the lower wedge key 2 with different slopes can be installed according to the usage requirements. The dimensions of the upper wedge key 1 and the lower wedge key 2 in the left and right directions can be adjusted according to the installation requirements to increase the adjustable range between the first top support surface 12 and the second top support surface 22.

[0049] In some embodiments, the lower wedge key 2 and the connecting plate 3 are fixedly connected by welding or integrally formed.

[0050] In some embodiments, such as Figure 3 and Figure 5 As shown, the connecting plate 3 is provided with a first fixing hole 31 corresponding to the upper wedge key 1. The first fixing hole 31 is an elongated hole extending along the first direction. The driving screw 4 is fixedly provided on the upper wedge key 1. The driving screw 4 passes through and is slidably assembled in the first fixing hole 31. The driving screw 4 is threadedly connected with a first nut 41 and a second nut 42. The first nut 41 and the second nut 42 are provided on both sides of the connecting plate 3.

[0051] A first fixing hole 31, which extends in the left-right direction and is an elongated hole, is provided. When adjusting the upper wedge key 1, the first nut 41 and the second nut 42 are screwed on, so that the drive screw 4 can move relative to the connecting plate 3 in the up-down direction. Pressing the drive screw 4 causes the upper wedge key 1 to slide along the second inclined surface 21 of the lower wedge key 2. The drive screw 4 moves with the upper wedge key 1 in the first fixing hole 31. The drive screw 4 moves relative to the connecting plate 3 in the up-down direction. When the upper wedge key 1 is in place, the first nut 41 and the second nut 42 are screwed on both sides of the connecting plate 3 so that the first nut 41 and the second nut 42 are pressed against the connecting plate 3, thereby fixing the drive screw 4 and the connecting plate 3 to fix the relative position of the upper wedge key 1 and the connecting plate 3.

[0052] The first fixing hole 31, the first nut 41, and the second nut 42 are provided to facilitate the adjustment of the position of the upper wedge key 1. At the same time, the position of the upper wedge key 1 can be precisely adjusted by the thread lead of the drive screw 4 and the number of turns of tightening the first nut 41 or the second nut 42, thereby improving the efficiency and adjustment accuracy of the guide bearing clearance.

[0053] Optionally, a washer is provided on the side of the first nut 41 and the second nut 42 near the connecting plate 3.

[0054] In some embodiments, such as Figure 1 and Figure 5 As shown, the connecting plate 3 is provided with a relief groove 32 on the side near the upper wedge key 1. The depth of the relief groove 32 is not less than the thickness of the second nut 42 or the first nut 41 to accommodate the second nut 42 or the first nut 41. By providing the relief groove 32, when the length dimensions of the upper wedge key 1 and the lower wedge key 2 are fixed, the range of movement of the upper wedge key 1 relative to the lower wedge key 2 is increased, so that there is a smaller distance between the first top support surface 12 and the second top support surface 22, thereby increasing the applicable range of the adjustment device 100.

[0055] In some embodiments, the size of the upper wedge key 1 in the second direction is not greater than the size of the lower wedge key 2 in the second direction. This can reduce interference between the upper wedge key 1 and other mechanisms during the adjustment process, and ensure that the upper wedge key 1 is adjusted to the lower wedge key 2 when the adjustment device 100 is installed for the first time, thus ensuring the reliability of the guide bearing clearance adjustment.

[0056] Preferably, the length of the upper wedge key 1 is smaller than the length of the lower wedge key 2.

[0057] In some embodiments, such as Figure 1 and Figure 5 As shown, the connecting plate 3 is provided with a measuring hole 33 corresponding to the upper wedge key 1. There are at least two measuring holes 33, which are spaced apart along the circumference of the drive screw 4.

[0058] Measuring holes 33 are provided so that after the adjustment device 100 is removed, measuring devices such as vernier calipers can be inserted into the measuring holes 33 to measure the distance from the end of the upper wedge key 1 to the top of the connecting plate 3. This facilitates measurement and provides higher accuracy compared to measuring in the oil tank. Furthermore, by providing at least two measuring holes 33, multiple measurement values ​​can be obtained. By taking the average of multiple measurement values, the obtained dimensions are further made more accurate, ensuring the reliability of the adjustment of the position of the upper wedge key 1.

[0059] Preferably, there are two measuring holes 33, and the two measuring holes 33 are symmetrically arranged on both radial sides of the drive screw 4.

[0060] In some embodiments, the measuring hole 33 is an elongated hole extending along a first direction. A measuring rod is fixedly provided on the upper wedge key 1. The measuring rod passes through the measuring hole 33 and is at least partially located on the side of the connecting plate 3 opposite to the upper wedge key 1. The measuring rod is provided with graduations at intervals, and a display is provided on one side of the graduations. The display is used to show the distance between the side of the connecting plate 3 opposite to the upper wedge key 1 and the end of the upper wedge key 1 or the distance between the first top support surface 12 and the second top support surface 22.

[0061] The measuring hole 33 is set as an elongated hole, and the measuring rod fixed on the upper wedge key 1 can move within the measuring hole 33. When the upper wedge key 1 moves in the vertical direction relative to the connecting plate 3, the measuring rod moves simultaneously relative to the connecting plate 3. The distance from the end of the upper wedge key 1 to the top of the connecting plate 3, or the distance between the first top support surface 12 and the second top support surface 22, can be quickly read through the scale and reading on the measuring rod, which facilitates the rapid adjustment of the upper wedge key 1 and improves the efficiency of adjusting the guide bearing clearance.

[0062] In some embodiments, such as Figure 1 , Figure 3 and Figure 4 As shown, the upper wedge key 1 is provided with a first limiting plate 13, which extends along the second direction. The first limiting plate 13 is provided with a second fixing hole 131, which is an elongated hole extending along the second direction. The lower wedge key 2 is provided with a second limiting plate 23 corresponding to the first limiting plate 13. The second limiting plate 23 is provided with a fixing bolt 24 whose position is adjustable along the third direction. The fixing bolt 24 passes through the second fixing hole 131 and is used to drive the first limiting plate 13 to move closer to the second limiting plate 23 to fix the upper wedge key 1 and the lower wedge key 2.

[0063] Specifically, the upper wedge key 1 is symmetrically provided with first limiting plates 13 on its front and rear sides, and the lower wedge key 2 is symmetrically provided with second limiting plates 23 on its front and rear sides. Both the first limiting plates 13 and the second limiting plates 23 extend in the vertical direction. The first limiting plate 13 is provided with a second fixing hole 131 extending in the vertical direction, and the second limiting plate 23 is equipped with a fixing bolt 24. When adjusting the position of the upper wedge key 1, the fixing bolt 24 is screwed on to make the first limiting plate 13 movable relative to the second limiting plate 23. When the upper wedge key 1 is adjusted to the set position, the first nut 41 and the second nut 42 are used to initially fix the upper wedge key 1. The fixing bolt 24 can be tightened to drive the first limiting plate 13 to move closer to the second limiting plate 23, so that the first inclined surface 11 is in close contact with the second inclined surface 21, further fixing the position of the upper wedge key 1. Finally, the first nut 41 and the second nut 42 are tightened.

[0064] By setting the first limiting plate 13 and the second limiting plate 23, the connection and fixation of the upper wedge key 1 and the lower wedge key 2 can be further realized, ensuring the fit of the first inclined surface 11 and the second inclined surface 21, ensuring the reliability of the upper wedge key 1 when used after adjustment, and ensuring the stability of the adjustment device 100 when used.

[0065] Optionally, the second limiting plate 23 is provided with a third fixing hole 231 corresponding to the second limiting hole, and the fixing bolt 24 is threadedly assembled in the third fixing hole 231; or, the fixing bolt 24 passes through the third fixing hole 231, and a fixing nut is threadedly connected to one end of the fixing bolt 24 that passes through the second limiting plate 23, and the fixing nut abuts against the second limiting plate 23 or is fixedly connected to the limiting plate.

[0066] In some embodiments, the drive screw 4 is threadedly fitted to the connecting plate 3. A slider is rotatably provided at one end of the drive screw 4 near the upper wedge key 1. A groove is provided at the end of the upper wedge key 1. The slider is slidably disposed in the groove and is stopped and engaged with the groove in a second direction perpendicular to the first direction.

[0067] Specifically, the connecting plate 3 is provided with a threaded hole, and the drive screw 4 is threaded onto the connecting plate 3 through the threaded hole. The end of the drive screw 4 is rotatably connected to a slider with a T-shaped cross section through a bearing. The end of the upper wedge key 1 is provided with a groove that matches the size of the slider. The two ends of the groove are provided with plugs to prevent the slider from coming out of the groove. When adjusting the upper wedge key 1, the drive screw 4 is rotated, and the slider moves towards or away from the connecting plate 3. Under the support of the second inclined surface 21 of the lower wedge key 2, the slider slides relative to the groove, and at the same time the upper wedge key 1 slides relative to the lower wedge key 2. The operation is convenient and the position of the upper wedge key 1 can be adjusted.

[0068] The following describes a method for adjusting the clearance of the guide bearing of a hydro-generator set according to an embodiment of the present invention.

[0069] The method for adjusting the guide bearing clearance of a hydro-generator set according to embodiments of the present invention includes the guide bearing clearance adjustment device for a hydro-generator set according to any of the above embodiments, and includes the following steps:

[0070] S1. Before installing the adjustment device, install a wedge plate between the limit pin and the bearing support to make the bearing bush support the shaft; place the adjustment device in the keyway of the bearing bush, and adjust the relative position of the upper wedge key and the lower wedge key by driving the screw. The upper wedge key and the lower wedge key press against the bearing support or the bearing bush respectively so that the bearing bush rests against the shaft.

[0071] S2. Fix the relative positions of the upper and lower wedge keys, remove the adjustment device, measure the distance between the end of the upper wedge key and the top surface of the connecting plate and record it as the initial distance;

[0072] S3. Calculate the lifting height of the upper wedge key based on the slope of the upper wedge key and the distribution amount of the bearing clearance; then adjust the position of the upper wedge key based on the lifting height.

[0073] The bearing clearance distribution is also the adjustment distance between the first support surface and the second support surface. The distance between the first support surface and the second support surface is adjusted by adjusting the position of the upper wedge key. The lifting height of the upper wedge key is calculated from the adjustment distance and the slope of the upper wedge key. After obtaining the lifting height, the position of the upper wedge key is adjusted.

[0074] S4. Check whether the relative position of the upper wedge key to the lower wedge key is adjusted in place. If the adjustment is in place, fix the relative position of the upper and lower wedge keys and install the adjustment device in the keyway of the bearing. If the adjustment is not in place, readjust.

[0075] The guide bearing clearance adjustment method of the hydro-generator set in this invention uses a double wedge key structure to make the contact with the bearing support and bearing bush a line contact or surface contact, which increases the reliability after the guide bearing clearance is adjusted. By being movably installed in the oil tank, it can be installed and removed as a whole, so as to facilitate dimensional measurement and adjustment of the upper wedge key outside the oil tank. The operation is convenient, efficient and accurate. Furthermore, the distance between the first support surface and the second support surface can be adjusted by moving the upper wedge key relative to the lower wedge key. It can be reused and adjusted repeatedly, which greatly saves labor costs and improves the efficiency of guide bearing clearance adjustment.

[0076] Optionally, in S4, when verifying whether the relative position adjustment of the upper wedge key to the lower wedge key is in place, the distance between the first support surface and the second support surface can be measured to calculate whether the actual adjustment distance has reached the set value, or the distance between the end of the upper wedge key and the top of the connecting plate can be measured to calculate whether the actual lifting height has reached the set value.

[0077] In some embodiments, during the use of the adjustment device, the adjustment device is taken out, the distance between the end of the upper wedge key and the top surface of the connecting plate is measured and recorded as the initial distance, the adjustment height of the upper wedge key is calculated according to the adjustment amount of the tile gap and the slope of the upper wedge key, the position of the upper wedge key is adjusted according to the adjustment height, and after verifying that the upper wedge key is adjusted in place, the adjustment device is installed.

[0078] It facilitates the adjustment of the position of the upper wedge key to ensure that the distance between the first and second support surfaces meets the requirements for adjusting the guide bearing clearance. It is easy to operate and has high adjustment accuracy.

[0079] Optionally, a dedicated inspection hole can be drilled in the oil sump cover plate corresponding to the keyway area. When adjusting the clearance for the second time, the adjustment device can be directly removed, and the bearing clearance can be adjusted without disassembling the oil sump cover plate. This method is highly efficient and saves a lot of labor costs.

[0080] In some embodiments, the connecting plate is provided with a first fixing hole, which is an elongated hole extending along a first direction. The driving screw is fixedly disposed on the upper wedge key and passes through and is slidably assembled in the first fixing hole. The driving screw is threadedly connected with a first nut and a second nut disposed on both sides of the connecting plate. When adjusting the position of the upper wedge key, the first nut and the second nut are adjusted in the direction away from the connecting plate, and the driving screw is pressed. The driving screw drives the upper wedge key to move along the second inclined plane in the direction away from the connecting plate.

[0081] The first fixing hole, the first nut, and the second nut are provided to facilitate the adjustment of the position of the upper wedge key. At the same time, the number of turns to tighten the first nut or the second nut can be calculated by the thread lead of the drive screw and the lifting height. The position of the upper wedge key can be precisely adjusted by turning the screw to a set number of turns, which improves the efficiency and adjustment accuracy of the guide bearing clearance.

[0082] Optionally, in S1, when adjusting the relative positions of the upper and lower wedge keys, the drive screw can be gently tapped with a copper hammer to make the first and second inclined surfaces come into close contact.

[0083] In some embodiments, the upper wedge key is provided with a first limiting plate extending in a second direction, and the first limiting plate is provided with a second fixing hole extending in the second direction. The lower wedge key is provided with a second limiting plate corresponding to the first limiting plate, and the second limiting plate is provided with a fixing bolt that is adjustable in a third direction and passes through the first fixing hole. When fixing the upper wedge key, the first nut and the second nut are screwed on to initially fix the upper wedge key. The fixing bolt is screwed on to make the first inclined surface and the second inclined surface fit together. The first nut and the second nut are screwed on further to complete the fixing of the upper wedge key.

[0084] By setting the first limiting plate and the second limiting plate, the connection and fixation of the upper wedge key and the lower wedge key can be further realized, ensuring the fit of the first inclined surface and the second inclined surface, ensuring the reliability of the upper wedge key when used after adjustment, and ensuring the stability of the adjustment device when used.

[0085] In some embodiments, the connecting plate is provided with a measuring hole corresponding to the upper wedge key. The measuring holes are provided with at least two and are spaced apart along the circumferential direction of the drive screw. When measuring the distance between the end of the upper wedge key and the top of the connecting plate, the measuring device is partially passed through the measuring hole to stop against the upper wedge key for measurement, and the average value of the data measured by at least two measuring holes is taken as the distance between the end of the upper wedge key and the top of the connecting plate.

[0086] Specifically, after the adjustment device is removed, a measuring device such as a vernier caliper can be inserted into the measuring hole to measure the distance from the end of the upper wedge key to the top of the connecting plate. This facilitates measurement and minimizes measurement error. With at least two measuring holes, multiple measurement values ​​can be obtained. By taking the average of multiple measurement values, the obtained dimensions become more accurate, ensuring the reliability of the upper wedge key position adjustment.

[0087] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0088] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0089] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0090] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0091] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0092] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A device for adjusting the clearance of a guide bearing in a hydro-generator set, characterized in that, include: The upper wedge key and the lower wedge key are provided. The upper wedge key has a first inclined surface and a first supporting surface that are arranged opposite to each other along a first direction. The lower wedge key has a second inclined surface and a second supporting surface that are arranged opposite to each other along a first direction. The first inclined surface and the second inclined surface have equal slopes and are arranged opposite to each other and are used to fit together. The first supporting surface and the second supporting surface are arranged parallel to each other. The first supporting surface is used to press against the bearing support or the bearing bush, and the second supporting surface is used to press against the bearing bush or the bearing support. A connecting plate and a driving screw are provided. The connecting plate is disposed at the ends of the upper wedge key and the lower wedge key and is connected to the upper wedge key and the lower wedge key respectively. The driving screw is assembled on the connecting plate and connected to the upper wedge key. The driving screw is used to drive the upper wedge key to move relative to the connecting plate to adjust the distance between the first support surface and the second support surface.

2. The guide bearing clearance adjustment device for a hydro-generator set according to claim 1, characterized in that, The connecting plate is provided with a first fixing hole corresponding to the upper wedge key. The first fixing hole is an elongated hole extending along the first direction. The driving screw is fixedly disposed on the upper wedge key. The driving screw passes through and is slidably assembled in the first fixing hole. The driving screw is threadedly connected with a first nut and a second nut. The first nut and the second nut are disposed on both sides of the connecting plate.

3. The guide bearing clearance adjustment device for a hydro-generator set according to claim 2, characterized in that, The connecting plate has a clearance groove on the side near the upper wedge key. The depth of the clearance groove is not less than the thickness of the second nut or the first nut to accommodate the second nut or the first nut. And / or, the connecting plate has a measuring hole corresponding to the upper wedge key. There are at least two measuring holes, which are spaced apart circumferentially along the drive screw.

4. The guide bearing clearance adjustment device for a hydro-generator set according to claim 1, characterized in that, The upper wedge key is provided with a first limiting plate extending along a second direction. The first limiting plate is provided with a second fixing hole, which is an elongated hole extending along the second direction. The lower wedge key is provided with a second limiting plate corresponding to the first limiting plate. The second limiting plate is provided with a fixing bolt whose position is adjustable along a third direction. The fixing bolt passes through the second fixing hole and is used to drive the first limiting plate to move closer to the second limiting plate to fix the upper wedge key and the lower wedge key.

5. The guide bearing clearance adjustment device for a hydro-generator set according to claim 1, characterized in that, The drive screw is threadedly fitted to the connecting plate. A slider is rotatably provided at one end of the drive screw near the upper wedge key. A groove is provided at the end of the upper wedge key. The slider is slidably disposed in the groove and is stopped and engaged with the groove in a second direction perpendicular to the first direction.

6. A method for adjusting the clearance of a guide bearing in a hydro-generator set, characterized in that, The guide bearing clearance adjustment device for a hydro-generator set according to any one of claims 1-5 includes the following steps: S1. Place the adjusting device in the keyway of the bearing shell, and adjust the relative positions of the upper wedge key and the lower wedge key by driving the screw. The upper wedge key and the lower wedge key press against the bearing support or the bearing shell so that the bearing shell rests against the shaft. S2. Fix the relative positions of the upper and lower wedge keys, remove the adjustment device, measure the distance between the end of the upper wedge key and the top surface of the connecting plate and record it as the initial distance; S3. Calculate the lifting height of the upper wedge key based on the slope of the upper wedge key and the distribution amount of the bearing clearance; then adjust the position of the upper wedge key based on the lifting height. S4. Check whether the relative position of the upper wedge key to the lower wedge key is adjusted in place. If the adjustment is in place, fix the relative position of the upper and lower wedge keys and install the adjustment device in the keyway of the bearing. If the adjustment is not in place, readjust.

7. The method for adjusting the clearance of the guide bearing of a hydro-generator unit according to claim 6, characterized in that, During the use of the adjustment device, take out the adjustment device, measure the distance between the end of the upper wedge key and the top surface of the connecting plate and record it as the initial distance. Calculate the adjustment height of the upper wedge key based on the adjustment amount of the tile gap and the slope of the upper wedge key. Adjust the position of the upper wedge key according to the adjustment height. After verifying that the upper wedge key is in place, install the adjustment device.

8. The method for adjusting the clearance of the guide bearing of a hydro-generator unit according to claim 6, characterized in that, The connecting plate is provided with a first fixing hole, which is an elongated hole extending along the first direction. The driving screw is fixed to the upper wedge key and passes through and is slidably assembled in the first fixing hole. The driving screw is threadedly connected with a first nut and a second nut located on both sides of the connecting plate. When adjusting the position of the upper wedge key, the first nut and the second nut are adjusted away from the connecting plate, and the driving screw is pressed. The driving screw drives the upper wedge key to move away from the connecting plate along the second inclined plane.

9. The method for adjusting the clearance of the guide bearing of a hydro-generator unit according to claim 8, characterized in that, The upper wedge key is provided with a first limiting plate extending in a second direction, and the first limiting plate is provided with a second fixing hole extending in the second direction. The lower wedge key is provided with a second limiting plate corresponding to the first limiting plate, and the second limiting plate is provided with a fixing bolt that is adjustable in a third direction and passes through the first fixing hole. When fixing the upper wedge key, the first nut and the second nut are screwed on to initially fix the upper wedge key. The fixing bolt is screwed on to make the first inclined surface and the second inclined surface fit together. The first nut and the second nut are screwed on further to complete the fixing of the upper wedge key.

10. The method for adjusting the clearance of the guide bearing of a hydro-generator unit according to claim 6, characterized in that, The connecting plate is provided with measuring holes corresponding to the upper wedge key. There are at least two measuring holes, which are spaced apart circumferentially along the drive screw. When measuring the distance between the end of the upper wedge key and the top of the connecting plate, the measuring device is partially passed through the measuring hole to stop against the upper wedge key for measurement. The average value of the data measured by at least two measuring holes is taken as the distance between the end of the upper wedge key and the top of the connecting plate.

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