Thrust sliding bearing device with hydraulic uniform load

Abstract

The thrust sliding bearing device comprises a machine frame, an oil baffle pipe is fixed to the middle of a bottom plate of the machine frame, a middle through hole of the oil baffle pipe is communicated with a middle through hole of the bottom plate of the machine frame, the upper portion of the oil baffle pipe extends out of the top face of the bottom plate of the machine frame, and a thrust head is inserted in the machine frame in a sleeved mode. An oil baffle pipe is inserted into the lower portion of a middle through hole of a thrust block in a sleeved mode, an annular protruding part is formed on the inner side wall of the upper portion of the middle through hole of the thrust block, the bottom face of the annular protruding part is close to the top face of the oil baffle pipe, and the top faces of a plurality of thrust pads abut against the bottom end face of the thrust block in a pressed mode. According to the thrust pad, the pressure borne by all the thrust pads can be consistent, so that the stress uniformity is ensured, the abrasion loss of all the thrust pads is basically consistent, and the service life of the thrust pads is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of sliding bearings, and more particularly to a thrust sliding bearing device with hydraulic load balancing. Background Art

[0002] With the advancement of science and technology, the country's requirements for energy conservation, environmental protection and green development are getting higher and higher. Large-scale mechanical equipment has lower unit energy consumption. Therefore, the development of equipment towards large-scale is a future trend. All rotating equipment requires bearings as support, and thrust sliding bearings are an indispensable key component in large-scale equipment.

[0003] Thrust sliding bearings need to bear the deadweight and working load of the rotating parts of the equipment. The elastic components originally used were used as supporting elements of the thrust pads to ensure that each thrust pad was evenly loaded. However, due to the expansion of the absolute error range of the elastic components after the size was enlarged, the thrust pads were unevenly loaded and the pad temperature deviated during operation. That is, the pressure of some thrust pads was too high, while the pressure of some thrust pads was too low, causing some thrust pads to be scrapped prematurely, affecting the overall use effect and service life. Summary of the Invention

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a thrust sliding bearing device with hydraulic load balancing, which can make the pressure on all thrust pads consistent to ensure force uniformity, so that the wear of all thrust pads is basically consistent, thereby ensuring their service life.

[0005] The solution of the present invention to the technical problem is:

[0006] A thrust sliding bearing device with hydraulic load balancing includes a frame, an oil retaining pipe is fixed to the middle of the bottom plate of the frame, a middle through hole of the oil retaining pipe is connected to the middle through hole of the bottom plate of the frame, the upper part of the oil retaining pipe extends out of the top surface of the bottom plate of the frame, a thrust head is inserted into the frame, the oil retaining pipe is inserted into the lower part of the middle through hole of the thrust head, an annular protrusion is formed on the upper inner side wall of the middle through hole of the thrust head, the bottom surface of the annular protrusion is close to the top surface of the oil retaining pipe, and the top surfaces of a plurality of thrust pads are pressed against the bottom end surface of the thrust head;

[0007] An annular base is fixed on the top surface of the bottom plate of the frame below the thrust head, and multiple hydraulic cylinders are fixed on the bottom surface of the top plate of the annular base. The top end of the push rod of the hydraulic cylinder extends out of the top surface of the top plate of the annular base and is inserted into the cylindrical hole formed in the middle part of the bottom surface of the corresponding thrust pad. A spherical pad is pressed against the top surface of the push rod of the hydraulic cylinder, and the bottom end surface of the pressure sensor is pressed against the top surface of the spherical pad. The force-bearing surface of the top of the pressure sensor is pressed against the top surface of the corresponding cylindrical hole. The pressure sensor and the spherical pad are in the corresponding cylindrical hole, and their outer side walls are close to the inner side wall of the cylindrical hole.

[0008] A side groove is formed on the inner side wall of the cylindrical hole, and the bottom end of the side groove extends out of the bottom surface of the thrust pad.

[0009] The oil inlets of all the hydraulic cylinders are connected to one end of a hydraulic oil pipe, and all the hydraulic oil pipes are connected in series and communicated with the output end of the oil pump of the thin oil station.

[0010] A positioning connection screw hole is formed on the top surface of the top plate of the annular base between each two adjacent thrust pads, and the screw portion of the limit screw is screwed into the corresponding positioning connection screw hole. A transverse portion is formed on the top of the limit screw, and the two ends of the transverse portion are inserted into the transverse limiting grooves formed on the opposite wall surfaces of the two adjacent thrust pads, and the outer end of the transverse limiting groove extends out of the outer wall of the thrust pad.

[0011] A locking nut is screwed onto the screw portion of the limit screw, and the bottom surface of the locking nut is pressed against the top surface of the top plate of the annular base.

[0012] An annular connecting plate is fixed to the middle of the inner wall of the side plate of the frame, and a guide bearing connecting frame is fixed on the annular connecting plate. The inner walls of multiple guide bearings installed on the inner side of the guide bearing connecting frame are close to the middle outer wall of the thrust head.

[0013] The outer end of the hydraulic oil pipe extends out of the outer end of the through hole on the outer wall plate of the annular base and is connected to one end of the three-way connector. The opposite ends of each two adjacent three-way connectors are connected through an arc-shaped connecting pipe.

[0014] One of the arc-shaped connecting pipes is composed of two arc-shaped connecting pipes and an intermediate three-way connector. The opposite ends of the two arc-shaped connecting pipes are connected to the two ends of the intermediate three-way connector, and the ends of the two arc-shaped connecting pipes that are away from each other are connected to the corresponding ends of the corresponding three-way connectors. Another end of the intermediate three-way connector is connected to one end of the first connecting pipe. The other end of the first connecting pipe is fixed to the inner end of the intermediate connecting block fixed on the side panel of the frame. The outer end of the intermediate connecting block extends out of the outer side wall of the side panel of the frame and is fixed with one end of the second connecting pipe. The other end of the second connecting pipe is connected to the output end of the oil pump of the thin oil station. A central through hole extending inward and outward is formed in the middle of the intermediate connecting block. The central through hole is connected to the first connecting pipe and the second connecting pipe.

[0015] The pressure sensor and the control box of the diluent station are electrically connected to the control host through electrical connecting lines. The pressure sensor transmits the pressure sensing signal to the control host, and the control host converts the pressure signal into an oil pressure signal and outputs it to the diluent station, controlling the output of the oil pump of the diluent station, thereby changing its output pressure value, ensuring that the pressure sensed by all pressure sensors is consistent and meets the requirements.

[0016] The guide bearing bushing connecting frame includes a main annular sleeve body, and a plurality of radially extending horizontal connecting plate portions are formed on the bottom outer wall of the main annular sleeve body, and all the horizontal connecting plate portions are evenly distributed on the bottom outer wall of the main annular sleeve body with the central axis of the main annular sleeve body as the center;

[0017] The outer end of the horizontal connecting plate is fixedly connected to the annular connecting plate by bolts, and a plurality of reinforcing ribs are formed or welded on the top surface of the horizontal connecting plate, and a side wall of the reinforcing rib is welded or formed on the outer wall of the main annular sleeve;

[0018] An adjusting screw is movably connected at a corresponding position of the outer wall of the main annular sleeve, the middle portion of the vertical adjusting plate is screwed onto the adjusting screw, the outer end of the adjusting screw extends out of the outer end of the vertical adjusting plate and is formed with a rotating portion, an external locking nut is screwed onto the adjusting screw, and the corresponding end surface of the external locking nut is pressed against the middle portion of the outer wall of the vertical adjusting plate;

[0019] The lower portion of the vertical adjustment plate extends out of the bottom end of the corresponding transverse adjustment slot formed on the horizontal connecting plate portion, and transverse adjustment plates are fixed to the top and bottom surfaces of the vertical adjustment plate;

[0020] The top and bottom surfaces of the main annular sleeve are fixedly connected with multiple upper horizontal limit plates and lower horizontal limit plates by bolts, and the guide bearing is located between the corresponding upper horizontal limit plate and lower horizontal limit plate. The top surface of the guide bearing is in contact with the bottom surface of the upper horizontal limit plate, and the bottom surface of the guide bearing is in contact with or tightly attached to the top surface of the lower horizontal limit plate. The middle top and bottom surfaces of the guide bearing are formed with plug-in holes, and the middle of the upper horizontal limit plate or the lower horizontal limit plate corresponding to the plug-in hole is formed with a waist-shaped adjustment groove. The upper and lower corresponding horizontal adjustment grooves are formed. A screw-through hole is formed on the section plate, and the positioning rod is screwed in the corresponding screw-through hole. A rotating part is formed on the outer end of the positioning rod, and the corresponding wall surface of the rotating part is pressed against the outer end surface of the corresponding transverse adjustment plate. The rod body at the inner end of the positioning rod is inserted into the corresponding waist-shaped adjustment groove and the plug-in hole, and its outer side wall is close to or close to the inner side wall of the corresponding plug-in hole. The part of the positioning rod extending out of the inner end of the waist-shaped adjustment groove is screwed with a locking nut, and the corresponding wall surface of the locking nut is pressed against the inner end surface of the corresponding transverse adjustment plate.

[0021] The outstanding effects of the present invention are:

[0022] It can make the pressure on all thrust pads consistent to ensure force uniformity, so that the wear of all thrust pads is basically consistent, thereby ensuring their service life.

[0023] At the same time, the guide bearing can be adjusted in position as needed, the adjustment is convenient, and the adjustment effect is high in precision. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a partial structural schematic diagram of the present invention;

[0025] Figure 2 yes Figure 1 A partial enlarged view of

[0026] Figure 3 yes Figure 1 a partial enlarged view of another part;

[0027] Figure 4 It is a partial cross-sectional view of the present invention in a top view;

[0028] Figure 5 yes Figure 4 A partial enlarged view of

[0029] Figure 6 It is a simplified partial diagram of the relationship between the oil station, control host and pressure sensor. DETAILED DESCRIPTION

[0030] For example, see Figures 1 to 6 As shown, a thrust sliding bearing device with hydraulic load balancing includes a frame 10, an oil retaining pipe 11 is fixed to the middle of the bottom plate of the frame 10, the middle through hole of the oil retaining pipe 11 is communicated with the middle through hole of the bottom plate of the frame 10, the upper part of the oil retaining pipe 11 extends out of the top surface of the bottom plate of the frame 10, a thrust head 20 is inserted in the frame 10, the oil retaining pipe 11 is inserted in the lower part of the middle through hole of the thrust head 20, an annular protrusion 21 is formed on the upper inner side wall of the middle through hole of the thrust head 20, the bottom surface of the annular protrusion 21 is close to the top surface of the oil retaining pipe 11, the top surface of a plurality of thrust pads 30 are pressed against the bottom end surface of the thrust head 20, and all the thrust pads 30 are evenly distributed below the bottom end surface of the thrust head 20 with the central axis of the thrust head 20 as the center;

[0031] An annular base 40 is fixed on the top surface of the bottom plate of the frame 10 below the thrust head 20, and a plurality of hydraulic cylinders 41 are fixed on the bottom surface of the top plate of the annular base 40. The top end of the push rod of the hydraulic cylinder 41 extends out of the top surface of the top plate of the annular base 40 and is inserted into the cylindrical hole 31 formed in the middle part of the bottom surface of the corresponding thrust pad 30. A spherical pad 42 is pressed against the top surface of the push rod of the hydraulic cylinder 41, and the bottom end surface of the pressure sensor 43 is pressed against the top surface of the spherical pad 42. The force-bearing surface of the top of the pressure sensor 43 is pressed against the top surface of the corresponding cylindrical hole 31. The pressure sensor 43 and the spherical pad 42 are in the corresponding cylindrical hole 31, and their outer side walls are close to the inner side wall of the cylindrical hole 31.

[0032] A side groove is formed on the inner side wall of the cylindrical hole 31 , the bottom end of the side groove extends out of the bottom surface of the thrust pad 30 , and the electrical connection line of the pressure sensor 43 extends out of the side groove.

[0033] The oil inlets of all the hydraulic cylinders 41 are connected to one end of a hydraulic oil pipe 44 , and all the hydraulic oil pipes 44 are connected in series and communicated with the output end of the oil pump of the thin oil station 50 (which is located around the equipment installed in this embodiment).

[0034] The pressure sensor 43 and the control box of the diluent station 50 are both electrically connected to the control host 100 via electrical connecting lines. The pressure sensor 43 transmits the pressure sensing signal to the control host 100. The PLC control system of the control host 100 converts the pressure signal into an oil pressure signal and outputs it to the diluent station 50, controls the output volume of the oil pump of the diluent station 50, thereby changing its output pressure value, ensuring that the pressure sensed by all pressure sensors 43 is consistent and meets the requirements. The control host 100 and the diluent station 50 are both existing conventional equipment and will not be described in detail.

[0035] A positioning connection screw hole is formed on the top surface of the top plate of the annular base 40 between each two adjacent thrust pads 30, and the screw portion of the limit screw 45 is screwed into the corresponding positioning connection screw hole. A transverse portion 451 is formed on the top of the limit screw 45, and the two ends of the transverse portion 451 are inserted into the transverse limiting grooves 32 formed on the opposite wall surfaces of the two adjacent thrust pads 30, and the outer end of the transverse limiting groove 32 extends out of the outer wall of the thrust pad 30.

[0036] A locking nut 46 is screwed onto the screw portion of the limit screw 45 , and the bottom surface of the locking nut 46 presses against the top surface of the top plate of the annular base 40 .

[0037] Furthermore, an annular connecting plate 12 is fixed to the middle of the inner wall of the side plate of the frame 10, and the guide bearing connecting frame 60 is fixed on the annular connecting plate 12. The inner walls of multiple guide bearings 61 installed on the inner side of the guide bearing connecting frame 60 are close to the middle outer wall of the thrust head 20.

[0038] The outer end of the hydraulic oil pipe 44 extends out of the outer end of the through hole on the outer wall of the annular base 40 and is connected to one end of a three-way connector 441. The opposite ends of each two adjacent three-way connectors 441 are connected by an arc-shaped connecting pipe 442.

[0039] One of the arc-shaped connecting pipes 442 is composed of two arc-shaped connecting pipes 4421 and an intermediate three-way connector 4422. The opposite ends of the two arc-shaped connecting pipes 4421 are connected to the two ends of the intermediate three-way connector 4422, and the ends of the two arc-shaped connecting pipes 4421 that are away from each other are connected to the corresponding ends of the corresponding three-way connector 441. Another end of the intermediate three-way connector 4422 is connected to one end of the first connecting pipe 443. The other end of the first connecting pipe 443 is fixed to the inner end of the intermediate connecting block 445 fixed on the side panel of the frame 10. The outer end of the intermediate connecting block 445 extends out of the outer side wall of the side panel of the frame 10 and is fixed with one end of the second connecting pipe 446. The other end of the second connecting pipe 446 is connected to the output end of the oil pump of the thin oil station 50. A central through hole extending inward and outward is formed in the middle of the intermediate connecting block 445. The central through hole is connected to the first connecting pipe 443 and the second connecting pipe 446.

[0040] Furthermore, the guide bearing bushing connector 60 includes a main annular sleeve 62, and a plurality of radially extending horizontal connecting plate portions 63 are formed on the bottom outer wall of the main annular sleeve 62. All the horizontal connecting plate portions 63 are evenly distributed on the bottom outer wall of the main annular sleeve 62 with the central axis of the main annular sleeve 62 as the center.

[0041] The outer end of the horizontal connecting plate portion 63 is fixedly connected to the annular connecting plate 12 by bolts. A plurality of reinforcing ribs 64 are formed or welded to the top surface of the horizontal connecting plate portion 63. One side wall of the reinforcing rib 64 is welded or formed to the outer wall of the main annular sleeve 62.

[0042] An adjusting screw 65 is movably connected at a corresponding position of the outer wall of the main annular sleeve 62. The middle portion of a vertical adjusting plate 66 is screwed onto the adjusting screw 65. The outer end of the adjusting screw 65 extends out of the outer end of the vertical adjusting plate 66 and is formed with a rotating portion. An external locking nut 67 is screwed onto the adjusting screw 65. The corresponding end surface of the external locking nut 67 is pressed against the middle portion of the outer wall of the vertical adjusting plate 66.

[0043] The lower portion of the vertical adjustment plate 66 extends out of the bottom end of the corresponding transverse adjustment slot 631 formed on the horizontal connecting plate portion 63, and transverse adjustment plates 661 are fixed to the top and bottom surfaces of the vertical adjustment plate 66;

[0044] The top and bottom surfaces of the main annular sleeve 62 are fixedly connected with multiple upper horizontal limit plates 67 and lower horizontal limit plates 68 by bolts, and the guide bearing 61 is located between the corresponding upper horizontal limit plates 67 and lower horizontal limit plates 68. The top surface of the guide bearing 61 is in contact with the bottom surface of the upper horizontal limit plate 67, and the bottom surface of the guide bearing 61 is in contact with or tightly attached to the top surface of the lower horizontal limit plate 68. The middle top and bottom surfaces of the guide bearing 61 are formed with plug-in holes 611, and the middle of the upper horizontal limit plate 67 or the lower horizontal limit plate 68 corresponding to the plug-in hole 611 is formed with a waist-shaped adjustment groove 1, which is aligned with the upper and lower surfaces. A threaded through hole is formed on the corresponding lateral adjustment plate 661, and the positioning rod 2 is threaded in the corresponding threaded through hole. A rotating part is formed on the outer end of the positioning rod 2, and the corresponding end face of the rotating part is pressed against the outer end face of the corresponding lateral adjustment plate 661. The rod body at the inner end of the positioning rod 2 is inserted into the corresponding waist-shaped adjustment groove 1 and the plug-in hole 611, and its outer side wall is close to or tightly attached to the inner side wall of the corresponding plug-in hole 611. The part of the positioning rod 2 extending out of the inner end of the waist-shaped adjustment groove 1 is threaded with a locking nut 3, and the corresponding wall surface of the locking nut 3 is pressed against the inner end face of the corresponding lateral adjustment plate 661.

[0045] Furthermore, an operating through groove is formed on the transverse adjustment plate 661 corresponding to the rotating portion of the bolt connecting the upper horizontal limit plate 67 and the lower horizontal limit plate 68.

[0046] In this embodiment, the outer locking nut 67 can be loosened and the adjusting screw 65 can be rotated, thereby moving the guide bearing 61 outward or inward through the corresponding two positioning rods 2 to change the distance between its inner wall and the outer wall of the thrust head 20.

[0047] The pressure sensor 43 of this embodiment can measure the actual bearing pressure value of the thrust pad 30, and the sum of the values ​​is the total load value; the output oil pressure of the thin oil station 50 multiplied by the cylinder diameter area of ​​the hydraulic cylinder 41 is the output pressure, and the sum of the values ​​is the total output pressure. By controlling the oil pressure, the output pressure is kept consistent with the total load value.

[0048] When this embodiment is in use, the control host 100 is running, the oil station 50 is started, the pressure sensor 43 measures the bearing pressure value of each thrust pad 30, and outputs the pressure signal to the control host 100. The pressure signal is converted into an oil pressure signal by the PLC control system of the control host 100 and output to the oil station 50. The oil station 50 outputs pressure oil of a certain pressure value and transmits it to the hydraulic cylinder 41 through the hydraulic oil pipe 44. Since the hydraulic cylinders 41 are connected through the hydraulic oil pipe 44, the internal pressure is the same, and the load of each thrust pad 30 is the same, avoiding the pressure deviation caused by the unequal height of the thrust pads due to installation error and processing error, and also avoiding the deviation of the support stiffness due to uneven material and heat treatment, which makes the deformation of the supporting parts inconsistent after loading, causing the thrust pads to be unequal in height, and then causing pressure deviation.

[0049] By employing a support structure using hydraulic cylinders 41, the imbalance can be automatically adjusted by the cylinders, ensuring that each thrust pad 30 is evenly loaded. When the host equipment is operating, the external load changes with changes in output power. The real-time load pressure of the thrust pad 30 is measured by pressure sensor 43. The PLC control system controls the output pressure of the oil station 50, adjusting the output pressure in real time to ensure it matches the load pressure. This enables the entire system to automatically adapt to external loads, and can accommodate various load values ​​from 0 to the maximum load value. This invention features a rational structure, significant effectiveness, and the ability to automatically adjust to changes in external load.

[0050] At the same time, an annular mounting groove is formed on the upper outer wall of the oil stop tube 11, and two arc-shaped blocking parts form an annular blocking part 80 which is inserted into the annular mounting groove. An elastic sealing layer is sandwiched between the inner wall surface and the corresponding inner wall of the annular mounting groove. The annular blocking part 80 is fixed on the oil stop tube 11. The annular blocking part 80 is made of insulating material, such as 3240 insulating board, and a plurality of annular grooves are formed on its outer wall. The outer wall is close to the inner wall of the middle through hole of the thrust head 20. The annular blocking part 80 blocks the oil below and reduces the upward flow of the oil along with the oil stop tube 11, so that the oil surface above the annular blocking part 80 is relatively stable, ensuring that the oil above it is in a laminar state.

[0051] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A thrust sliding bearing device with hydraulic load balancing, comprising a frame (10), an oil retaining pipe (11) fixed to the middle of the bottom plate of the frame (10), a middle through hole of the oil retaining pipe (11) communicating with the middle through hole of the bottom plate of the frame (10), an upper portion of the oil retaining pipe (11) extending out of the top surface of the bottom plate of the frame (10), a thrust head (20) inserted in the frame (10), the oil retaining pipe (11) inserted in the lower portion of the middle through hole of the thrust head (20), an annular protrusion (21) formed on the upper inner side wall of the middle through hole of the thrust head (20), the bottom surface of the annular protrusion (21) close to the top surface of the oil retaining pipe (11), characterized in that: The top surfaces of a plurality of thrust pads (30) are pressed against the bottom end surface of the thrust head (20), and all the thrust pads (30) are evenly distributed below the bottom end surface of the thrust head (20) with the central axis of the thrust head (20) as the center; An annular base (40) is fixed on the top surface of the bottom plate of the frame (10) below the thrust head (20), and a plurality of hydraulic cylinders (41) are fixed on the bottom surface of the top plate of the annular base (40). The top end of the push rod of the hydraulic cylinder (41) extends out of the top surface of the top plate of the annular base (40) and is inserted into a cylindrical hole (31) formed in the middle part of the bottom surface of the corresponding thrust pad (30). A spherical pad (42) is pressed against the top surface of the push rod of the hydraulic cylinder (41), and the bottom end surface of the pressure sensor (43) is pressed against the top surface of the spherical pad (42). The force-bearing surface of the top of the pressure sensor (43) is pressed against the top surface of the corresponding cylindrical hole (31). The pressure sensor (43) and the spherical pad (42) are located in the corresponding cylindrical hole (31), and their outer walls are close to the inner wall of the cylindrical hole (31).

2. A thrust sliding bearing device with hydraulic load balancing according to claim 1, characterized in that: A side groove is formed on the inner side wall of the cylindrical hole (31), the bottom end of the side groove extends out of the bottom surface of the thrust pad (30), and the electrical connection line of the pressure sensor (43) extends out of the side groove.

3. The thrust sliding bearing device with hydraulic load balancing according to claim 1, characterized in that: The oil inlets of all the hydraulic oil cylinders (41) are connected to one end of a hydraulic oil pipe (44), and all the hydraulic oil pipes (44) are connected in series and communicated with the output end of the oil pump of the dilution oil station (50).

4. The thrust sliding bearing device with hydraulic load balancing according to claim 1, characterized in that: A positioning connection screw hole is formed on the top surface of the top plate of the annular base (40) between each two adjacent thrust pads (30), and the screw portion of the limiting screw (45) is screwed into the corresponding positioning connection screw hole. A transverse portion (451) is formed on the top of the limiting screw (45), and both ends of the transverse portion (451) are inserted into the transverse limiting groove (32) formed on the opposite wall surface of the two adjacent thrust pads (30), and the outer end of the transverse limiting groove (32) extends out of the outer wall of the thrust pad (30).

5. The thrust sliding bearing device with hydraulic load balancing according to claim 4, characterized in that: A locking nut (46) is screwed onto the screw portion of the limit screw (45), and the bottom surface of the locking nut (46) is pressed against the top surface of the top plate of the annular base (40).

6. The thrust sliding bearing device with hydraulic load balancing according to claim 1, characterized in that: An annular connecting plate (12) is fixed to the middle of the inner side wall of the side plate of the frame (10), and a guide bearing bush connecting frame (60) is fixed to the annular connecting plate (12). The inner side walls of multiple guide bearing bushes (61) installed on the inner side of the guide bearing bush connecting frame (60) are close to the middle outer side wall of the thrust head (20).

7. The thrust sliding bearing device with hydraulic load balancing according to claim 3, characterized in that: The outer end of the hydraulic oil pipe (44) extends out of the outer end of the through hole on the outer wall plate of the annular base (40) and is connected to one end of a three-way connector (441). The opposite ends of each two adjacent three-way connectors (441) are connected through an arc-shaped connecting pipe (442). One of the arc-shaped connecting pipes (442) is composed of two arc-shaped connecting pipes (4421) and an intermediate three-way connector (4422). The opposite ends of the two arc-shaped connecting pipes (4421) are connected to the two ends of the intermediate three-way connector (4422). The ends of the two arc-shaped connecting pipes (4421) that are away from each other are connected to the corresponding ends of the corresponding three-way connectors (441). Another end of the intermediate three-way connector (4422) is connected to one end of the first connecting pipe (443). The first connecting pipe (443) ) is fixed to the inner end of an intermediate connecting block (445) fixed to the side plate of the frame (10), the outer end of the intermediate connecting block (445) extends out of the outer side wall of the side plate of the frame (10) and is fixed with one end of a second connecting pipe (446), the other end of the second connecting pipe (446) is connected to the output end of the oil pump of the thin oil station (50), and a central through hole extending inward and outward is formed in the middle of the intermediate connecting block (445), and the central through hole is communicated with the first connecting pipe (443) and the second connecting pipe (446).

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