CN114088397B - Thrust bearing performance test device based on similarity theory - Google Patents
Thrust bearing performance test device based on similarity theory Download PDFInfo
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- CN114088397B CN114088397B CN202111493223.2A CN202111493223A CN114088397B CN 114088397 B CN114088397 B CN 114088397B CN 202111493223 A CN202111493223 A CN 202111493223A CN 114088397 B CN114088397 B CN 114088397B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
- G01M13/04—Bearings
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Abstract
The invention aims to provide a thrust bearing performance test experimental device and a test method based on a similar theory, which aim to solve the problems that a 1:1 test bed in the prior art is overlarge in volume, cannot perform various bearing tests, is overlarge in test cost and the like, and provide test and evaluation for more conveniently testing and evaluating the performance of a thrust bearing; the device comprises a transmission system, a bearing testing device and a loading system, wherein the transmission system, the bearing testing device and the loading system are sequentially arranged from top to bottom by taking a test bed as a basic frame; the transmission system is connected with the rotating shaft and provides rotating speed and torque required by the test for the rotating shaft, and the rotating shaft downwards passes through the bearing testing device and the loading system; the loading system provides an external loading force.
Description
Technical Field
The invention relates to the field of test devices for testing performance of oil lubrication thrust bearings, in particular to a thrust bearing performance test device based on a similarity theory.
Background
Tilting pad thrust bearings are often used in rotating machines with high thrust loads, such as nuclear main pumps, energy storage units and the like, and whether the working performance of the tilting pad thrust bearings is good or bad is determined by whether the unit is safely operated. By virtue of the pressure generated by the lubricating oil between the sliding surface and the thrust shoe, the external load applied to the sliding surface is counteracted, thereby preventing the two surfaces from coming into contact, and thus the thrust bearing is widely used. With the continuous progress of technology and the rapid development of industrial production, rotary machines gradually develop to large and complex, and bearings are indispensable parts in rotary machines, and the unavoidable abrasion of rotary motions is the most likely to cause faults. Therefore, the quality and reliability of the thrust bearing are increasingly important, and the life test and performance evaluation of the bearing are regarded as important, especially for the bearing under special working conditions, the performance test becomes a key link of the quality control of the whole tool. In the process of independently developing a unit motor, the design and verification of the bearing are required, and the actual running on the unit is too high in verification risk, so that the bearing cannot be verified under all working conditions, and the test cost is improved. In the current thrust bearing verification process, a 1:1 test bed is mostly adopted for verification, namely the thrust bearing structure, namely the actual operation parameters, are kept consistent, and the 1:1 test bed can better meet the bearing performance test, but has larger construction cost and no universality.
Disclosure of Invention
The invention aims to provide a thrust bearing performance test experimental device based on a similar theory, and aims to solve the problems that a 1:1 test bed in the prior art is overlarge in size, cannot perform various bearing tests, is too high in test cost and the like, and provide test and evaluation for more conveniently testing and evaluating the performance of a thrust bearing.
In order to solve the technical problems, the technical scheme of the invention is realized as follows:
a thrust bearing performance test device based on a similarity theory performs 2:1 or 4:1 similarity reduction on an original bearing model structure according to actual requirements, performs calculation of test working condition parameters based on the difference of bearing structural parameters before and after reduction and on the basis of the fact that bearing specific pressures are equal and linear speeds are consistent, and can correspond to an actual working condition bearing test result.
The thrust bearing performance test device comprises a test bed, a transmission system, a bearing test device and a loading system. The loading system, the bearing testing system and the transmission system are vertically arranged by depending on the test bed, the transmission system is installed on the upper portion of the test bed, the bearing testing system is installed in the middle of the test bed, and the loading system is installed on the lower portion of the test bed.
The test bed is formed by connecting rigid square pipes with different sizes and lengths, and round holes are formed in the wall surface of the square pipe, so that other parts can be conveniently fixed. The motor is fixed on the upper portion of the test bed, the motor provides torque and rotating speed required by the test bed, meanwhile, a motor rotating shaft is connected with one end of a coupler, and the other end of the coupler is connected with a transmission main shaft of the test bed.
A thrust bearing is arranged in the bearing testing device, a plurality of temperature sensors are distributed on the back of the bearing bush in an embedded manner, and the temperature of the bearing bush is measured; the lower end of the bearing is positioned with a rotary mirror plate, the rotary mirror plate moves synchronously with the main shaft, pressure sensors and displacement sensors are distributed on the surface of the mirror plate in an embedded mode, and the measurement of the pressure and thickness of the oil film of the bearing is realized. The bearing testing device is provided with a circulating oil way for supplying lubricating oil required by the thrust bearing so as to provide lubrication and cooling.
The loading system provides load required by the test, the load is provided for a hydraulic loading system commonly used in the prior art, the hydraulic loading system is loaded by a piston type hydraulic cylinder, the pressure of the loading system is adjustable, and the pressure is measured by a pressure sensor. The vertical load transmission process is that a hydraulic oil cylinder acts on a thrust shoe, a main shaft drives a thrust head to rotate, so that a hydrostatic bearing applies load to the thrust head through oil film dynamic pressure, and the positions of the thrust head, the main shaft and a mirror plate are relatively fixed, so that the load is finally applied to the mirror plate.
As a preferred embodiment, the test stand includes a stand base, a stand spacer, a stand top plate, a stand cross member, and a stand column. The rack base is of a rib plate frame structure in a hollow mode, the upper surface and the lower surface are flat plates, and the middle of the rack base is supported by rib plates. The rack partition plate is a horizontal flat plate and is arranged between different systems. The rack top plate is a horizontal flat plate and is fixed and installed on the upper portion of the rack. The upright posts are uniformly distributed at four corners of the test bed and are supported at the positions around the flat plate. The end part of the rack cross beam is connected with the upright post, and the wall surface of the rack cross beam and the flat plate are respectively provided with corresponding bolt holes, so that the stability of the whole structure is further ensured. The foundation framework structure formed by the bench top plate, the bench base, the bench cross beam and the stand column is used for bearing axial load during test, so that a pressing load is provided for the test bearing.
As a preferred embodiment, the transmission device is driven by a conventional variable-frequency alternating-current motor, and the forward and reverse rotation speeds and the rotation speed of the motor are adjustable. The motor is arranged on the upper part of the test bench and is fixed with the bench top plate, a motor shaft of the motor is connected with one end of a coupler, and the other end of the coupler is connected with the main shaft. The main shaft vertically passes through the rack base, the rack partition plate and the rack top plate.
As a preferred embodiment, the spindle is placed vertically, with two linear positioning bearings arranged in the axial direction, through which the spindle passes in turn. The first linear positioning bearing is in contact with the first partition plate of the rack, and the second linear positioning bearing is in contact with the base of the rack. The linear bearing can restrain circumferential vibration of the rotating shaft and position the rotating shaft on one hand, and can realize axial movement of the rotating shaft on the other hand.
As a preferred embodiment, the bearing testing device is located between the first and second rack partitions, and comprises a test oil tank, a test bearing, a mirror plate, an end cap, a fixing ring, and a sealing device. The test oil tank is a cylindrical hollow cavity, the rotating shaft penetrates through the cavity, the end covers are respectively an upper end cover and a lower end cover, the upper end cover is in contact fit with the upper part of the test oil tank, an oil inlet hole and a specific sealing hole are formed in the wall surface of the upper end cover, the lower end cover is in contact fit with the lower part of the test oil tank, and a sealing hole with a diameter slightly larger than that of the rotating shaft is formed in the surface of the lower end cover. The mirror plate is a circular ring flat plate, an opening groove is formed in the inner circle of the mirror plate and sleeved on the rotating shaft, a step and a key groove are formed in the end of the rotating shaft, the lower surface of the mirror plate is abutted to the surface of the step, and the mirror plate and the rotating shaft are connected through keys to realize synchronous rotation.
As an implementation scheme, the loading system is arranged at the middle lower part of the test bed and comprises a loading oil cylinder, a hydrostatic bearing and a thrust head, wherein the thrust head is abutted with the rotating shaft and fixed through a flat key to realize synchronous rotation and axial movement, the loading oil cylinder is fixed on a bottom plate of the loading device and is uniformly distributed in the circumferential direction, high-pressure oil is provided by an external hydraulic pump station to realize the ascending and descending of a hydraulic cylinder piston, the lower end of the hydrostatic bearing is connected with the loading oil cylinder, and lubrication between the hydrostatic bearing and the thrust head is realized by adjusting the oil pressure of the external hydraulic pump station.
Compared with the prior art, the invention has the beneficial effects that:
(1) The whole volume of the test bed is small, the size of the test bed is reduced on the basis of ensuring the test precision, and the test cost is saved;
(2) The whole device has higher modularization degree and can be repeatedly used or replaced by similar size;
(3) The loading system has stable performance, adopts an external pump station for pressurization, and realizes lubrication by means of a hydrostatic bearing;
(4) The application range is wide, and the performance test of the bearing under various start-stop environments can be realized.
Drawings
The invention is described in further detail below with reference to the attached drawing figures:
FIG. 1 is an overall three-dimensional schematic view of a thrust bearing performance test apparatus of the present invention.
FIG. 2 is a schematic overall cross-sectional view of a thrust bearing performance test apparatus of the present invention.
FIG. 3 is a schematic view of a thrust bearing performance test apparatus bearing test apparatus according to the present invention.
FIG. 4 is a schematic diagram of the loading system of the thrust bearing performance test apparatus of the present invention.
In the figure: 1. the device comprises a transmission system, a test bed, a bearing test device, a loading system, a test bed base and a second positioning bearing, wherein the transmission system, the test bed, the bearing test device and the loading system are arranged in sequence, and the transmission system, the test bed, the first positioning bearing, the bearing test device, the loading system, the test bed base and the second positioning bearing are arranged in sequence;
11. the motor comprises an alternating current motor 12, a motor cover 13, a coupler 14 and a rotating shaft;
21. the rack comprises a rack top plate 22, a first rack partition plate 23, a rack cross beam 24, a second rack partition plate 25, a stand column 26 and a third rack partition plate;
31. the temperature sensor, 32, the pressure sensor, 33, the displacement sensor, 34, the conductive slip ring, 34A, the rotor, 34B and the stator;
41. the sealing upper gland, 42, upper end cover packing seal, 43, oil tank upper end cover, 44, thrust bearing fixing ring, 45, thrust bearing, 46, mirror plate, 47, oil tank, 48, lower end cover packing seal, 49, oil tank lower end cover, 50, sealing lower gland;
51. the thrust head fixing ring 52, the oil outlet pipe 53, the thrust head 54, the hydrostatic bearing 55, the loading oil cylinder 56, the oil inlet pipe 57, the loading oil tank 58, the oil cylinder connector 59 and the sealing sleeve.
Detailed Description
The invention is described in further detail below with reference to the embodiments of the drawings.
Further advantages and effects of the present invention will become apparent to those skilled in the art from the disclosure of the present invention, which is described in the following specific embodiments.
Referring to the drawings, the structures, proportions, sizes, etc. shown in the drawings are shown only in connection with the disclosure of the present invention, and are not intended to limit the scope of the invention, which is defined by the claims, so that any structural modifications, proportional changes, or adjustments of sizes may be made without affecting the efficacy of the invention or achieving the purpose, and are therefore within the scope of the disclosure. In addition, the positional limitation terms recited in the present specification are used merely for convenience of description, and are not intended to limit the scope of the invention, in which the relative changes or modifications are regarded as the scope of the invention without any substantial modification to the technical content.
As shown in fig. 1, a thrust bearing performance test device based on a similar theory comprises a transmission system 1, a bearing test device 4, a loading system 5, a test bed base 6 and a test bed 2. The transmission system 1, the bearing testing device 4, the loading system 5 and the test bed base 6 are sequentially arranged in a vertical sequence by taking the test bed 2 as a basic frame; the transmission system 1 is arranged on the upper part of the test bench 2, the bearing testing device 4 is arranged below the transmission system, namely, the inside of the test bench 2, the loading system 5 is connected with the bearing testing device 4 and is arranged on the lower part of the bearing testing device 4, and the test bench base is connected with the loading system 5 and is arranged on the lower part of the loading system 5. The loading system 5 provides the external loading force required for the test and the transmission system provides the rotational speed and torque required for the test.
As shown in fig. 1 and 2, the test stand 2 includes three layers of stand partitions 22, 24, 26, a stand top plate 21, a plurality of stand beams 23, and four stand columns 25; the three-layer rack partition plates 22, 24 and 26 and the rack top plate 21 are supported by the four upright posts 25 to form a laminated plate structure, the rack cross beam 23 is connected between the four upright posts 25 and used for positioning the upright posts 25 two by two, and the transverse support three-layer rack partition plates 22, 24 and 26 and the rack top plate 21 are fixed. The rack partitions 22, 24, 26 are all horizontal regular plates for supporting the modules. Wherein a first rack partition 22 is mounted on the upper part of the bearing testing device 4, a second rack partition 24 is mounted between the bearing testing device 4 and the loading system 5, and a third rack partition 26 is mounted between the loading system 5 and the test bed base 6. The bench top plate 21 is a horizontal flat plate and is installed at the upper end of the test bench. The upright posts 25 are uniformly distributed at four corners of the test bench and are vertically arranged. The plurality of rack cross beams 23 are horizontally arranged and connected with the upright posts 25, and the upper end surfaces or the lower end surfaces of the plurality of rack cross beams 23 are respectively contacted with the rack partition plates 22, 24 and 26 and the rack top plate 21 and are fixed by bolts through bolt holes. The test stand 2 forms the integrated base of the test transmission 1, the bearing test device 4, the loading system 5 and the test stand base 6.
As shown in fig. 2, the transmission system 1 includes an alternating current motor 11, a motor housing 12, a coupling 13, and a rotating shaft 14. The alternating current motor 11 is an alternating current motor capable of realizing rotation speed adjustment, the alternating current motor 11 is fixed on the upper surface of the rack top plate 21, and an output shaft of the alternating current motor 11 penetrates through the rack top plate 21. The motor cover 12 is mounted on the upper portion of the test bed 2 and completely surrounds the alternating current motor 11, the upper end of the coupler 13 is connected with an output shaft of the alternating current motor 11 through a flat key, and the lower end of the coupler is coaxially connected with the upper end of the rotating shaft 14 through a flat key. The rotating shaft 14 passes through the first positioning bearing 3 and the second positioning bearing 7, and secondly, the rotating shaft 14 also passes through the rack partition plates 22, 24 and 26, the rack top plate 21, the bearing testing device 4, the loading system 5 and the test stand base 6. The first positioning bearing 3 and the second positioning bearing 7 are linear bearings, the first positioning bearing 3 is fixed on the upper surface of the first rack partition plate 22, and the second positioning bearing 7 is fixed on the rack base 6.
As shown in fig. 3, the bearing testing device 4 comprises a sealing upper gland 41, an upper end cover packing seal 42, an oil tank upper end cover 43, a thrust bearing fixing ring 44, a thrust bearing 45, a mirror plate 46, an oil tank 47, a lower end cover packing seal 48, an oil tank lower end cover 49 and a sealing lower gland 50, wherein the rotating shaft 14 sequentially passes through the sealing upper gland 41, the oil tank upper end cover 43, the thrust bearing 45, the mirror plate 46, the oil tank lower end cover 49 and the sealing lower gland 50; the upper end cover 43 of the oil tank seals the upper port of the oil tank 47, the lower end cover 49 of the oil tank seals the lower port of the oil tank 47, specifically, the oil tank 47 is a cylinder structure with flange openings arranged up and down, the upper end cover 43 of the oil tank is connected with the upper end flange of the oil tank 47 through bolts and is fixedly connected with the first rack partition board 22, and the lower end cover 49 of the oil tank is connected with the lower end flange of the oil tank 47 through bolts and is fixedly connected with the second rack partition board 24; the sealing upper gland 41 and the sealing lower gland 50 are respectively connected with the oil tank upper end cover 43 and the oil tank lower end cover 49 through bolts, and compress an upper end cover packing seal 42 and a lower end cover packing 48, wherein the upper end cover packing seal 42 is used for sealing the oil tank upper end cover 43 and the rotating shaft 14, and the lower end cover packing seal 48 is used for sealing the oil tank lower end cover 49 and the rotating shaft 14; the thrust bearing fixing ring 44 is fixedly arranged below the upper end cover 43 of the oil tank, specifically, a flange ring is arranged on the outer side of the thrust bearing fixing ring 44 and fixedly clamped between the upper flange ring of the oil tank 47 and the upper end cover 43 of the oil tank, so that the position of the thrust bearing fixing ring 44 is fixed, and the thrust bearing fixing ring and the test bench are kept stationary. The thrust bearing retainer ring 44 is coupled to the thrust bearing 45 and limits axial displacement of the thrust bearing 45 along the shaft 14. The thrust bearing 45 and the mirror plate 46 are both located inside the oil tank 47, and are sleeved on the rotating shaft 14 in a mutually facing manner, the mirror plate 46 is a thicker circular plate, the inner circle of the mirror plate is provided with a key slot, the key slot is connected with the rotating shaft 14 and rotates synchronously, the mirror plate 46 is provided with a plurality of through holes, a pressure sensor and a displacement sensor can be installed, and the mirror plate 46 is arranged at the lower part of the thrust bearing 45.
As shown in fig. 3, the bearing testing device 4 further has a measuring system, which includes a temperature sensor 31, a pressure sensor 32, a displacement sensor 33, and an electrically conductive slip ring 34, where the temperature sensor 31 is installed in a back hole of the bearing shell of the thrust bearing 45, and a plurality of temperature sensors 31 are disposed on the back of the bearing shell, and the hole depth of the back hole of the bearing shell does not completely penetrate through the thickness of the thrust bearing 45, and its bottom is located 2mm away from the tile surface (i.e., the surface adjacent to the mirror plate 46). The mirror plate 46 is provided with through-type circular holes at equal intervals in the radial direction, and the pressure sensor 32 and the displacement sensor 33 are mounted in the circular holes of the mirror plate 46. The conductive slip ring 34 is a via hole type conductive slip ring, and is composed of a rotor 34A and a stator 34B, the rotor 34A is fixed with the rotating shaft 14 and rotates synchronously, the stator 34B is fixed with the oil tank 47, the wires of the temperature sensor 31, the pressure sensor 32 and the displacement sensor 33 are connected with the rotor 34A, and the stator 34B is connected with an external data collector, so that data dynamic collection can be realized when the mirror plate 46 rotates.
As shown in fig. 4, the loading system 5 includes a thrust head fixing ring 51, an oil outlet pipe 52, a thrust head 53, a hydrostatic bearing 54, a loading oil cylinder 55, an oil inlet pipe 56, a loading oil tank 57, an oil cylinder connector 58 and a sealing sleeve 59; the upper and lower ends of the loading oil tank 57 are closed by a partition plate, the upper part of the thrust head 53 is fixed by the thrust head fixing ring 51 to limit the axial displacement of the thrust head, and the thrust head 53 is connected with the rotating shaft 14 through a flat key and synchronously rotates. The loading cylinders 55 include a plurality of loading cylinders 55, the loading cylinders 55 are disposed on a bottom partition plate of the loading oil tank 57, an output end of each loading cylinder is connected with the hydrostatic bearing 54, the hydrostatic bearing 54 is located at a lower portion of the thrust head 53, high-pressure lubricating oil is injected into the hydrostatic bearing 54 to jack up the thrust head 53, and further the hydrostatic bearing 54 is prevented from being in contact with the thrust head 53, that is, a gap is formed between the thrust head 53 and an adjacent surface of the hydrostatic bearing 54 by means of lubricating oil pressure. The oil loading tank 57 is internally provided with a certain level of lubricating oil, the level of the lubricating oil is higher than the hydrostatic bearing 54 and lower than the upper surface 53 of the thrust head, the lubricating oil is injected by an external hydraulic station through an oil inlet 56, and the high-temperature lubricating oil is sucked out by the oil outlet pipe 52. The sealing sleeve 59 is sleeved outside the rotating shaft 14, the lower end of the sealing sleeve is in contact with the bottom of the oil tank, the upper end of the sealing sleeve 59 stretches into the space between the thrust head 53 and the rotating shaft 14, and the height of the sealing sleeve 59 is higher than the lubricating oil level.
The tilting pad thrust bearing test device is used for testing the bearing, the pressure parameter and the rotating speed can be set according to the actual working condition of the thrust bearing and the similarity theory, the highest torque parameter allowed by the thrust bearing in the actual working condition is set, and the running time of the thrust bearing reaching the set highest torque for the first time is tested. The invention realizes the following functions: controlling the operation of the whole set of equipment by using a computer, and controlling the external loading force and the adjustment of the rotating speed of the motor by using the computer; the thickness of the oil film, the pressure of the oil film and the temperature of the bearing can be detected; collecting, recording and storing data in real time; the designed test bed can be used for carrying out tests of changing bearings with different sizes; and the loading system, the test bed component, the rotary transmission system and other mechanical systems are integrated, so that the assembly and the maintenance are convenient.
While the specific embodiments of the present invention have been described above with reference to the drawings, the present invention is not limited to the protection scope of the present invention, and those skilled in the art should understand that, based on the technical solutions of the present invention, various equivalent structures or equivalent processes of the present invention may be modified or changed without any creative effort, or may be directly or indirectly applied to other related technical fields, and still fall within the protection scope of the present invention.
Claims (7)
1. The thrust bearing performance test device based on the similarity theory is characterized by comprising a transmission system, a bearing test device and a loading system, wherein the transmission system, the bearing test device and the loading system are sequentially arranged from top to bottom by taking a test bed as a basic frame;
the transmission system is connected with the rotating shaft and provides rotating speed and torque required by the test for the rotating shaft, and the rotating shaft downwards passes through the bearing testing device and the loading system; the transmission system comprises an alternating current motor, the alternating current motor is arranged on the upper part of the test bed, and the alternating current motor is connected with the rotating shaft; the loading system provides an external loading force;
the bearing testing device comprises a thrust bearing, a thrust bearing fixing ring and a mirror plate, wherein the thrust bearing and the mirror plate are sleeved on the rotating shaft in a mutually facing manner, the mirror plate is a thick circular plate which is fixedly connected with the rotating shaft relatively and synchronously rotates, and a plurality of through holes penetrating through the thickness of the mirror plate are formed in the mirror plate; the thrust bearing is positioned above the mirror plate, and the thrust bearing fixing ring is positioned above the thrust bearing and connected with the thrust bearing; the thrust bearing fixing ring is static relative to the test bench;
the bearing testing device further comprises a measuring system, wherein the measuring system comprises a temperature sensor, a pressure sensor, a displacement sensor and a conductive slip ring, the pressure sensor and the displacement sensor are installed in a through hole of the mirror plate, the temperature sensor is installed in a back hole of a bearing bush of the thrust bearing, the back hole of the bearing bush is an opening with depth which does not completely penetrate through the thickness direction of the thrust bearing, and the bottom of the opening is 2mm away from the tile surface of the thrust bearing; the conductive slip ring is a through hole type conductive slip ring and comprises a rotor and a stator, wherein the rotor and the rotating shaft are fixed and synchronously rotate, the stator is stationary and fixed relative to the test bed, the temperature sensor, the pressure sensor and the displacement sensor are all connected with the rotor through wires, and the stator is connected with an external data acquisition device;
the loading system comprises a thrust head fixing ring, an oil outlet pipe, a thrust head, a hydrostatic bearing, a loading oil cylinder, an oil inlet pipe, a loading oil tank, an oil cylinder connector and a sealing sleeve; the upper end and the lower end of the loading oil tank are sealed by a baffle plate, the upper part of the thrust head is fixed by the thrust head fixing ring, and the axial displacement of the thrust head is limited; the thrust head is fixedly connected with the rotating shaft and synchronously rotates; the loading oil cylinders comprise a plurality of loading oil cylinders, the loading oil cylinders are arranged on a bottom partition plate of the loading oil tank, the output ends of the loading oil cylinders are connected with the hydrostatic bearings, the hydrostatic bearings are positioned at the lower parts of the thrust heads, and the thrust heads can be jacked up by means of injection pressure of high-pressure lubricating oil, so that the hydrostatic bearings are prevented from being in contact with the thrust heads; the lubricating oil with a certain liquid level is arranged in the loading oil tank, the liquid level of the lubricating oil is higher than the hydrostatic bearing and lower than the upper surface of the thrust head, the lubricating oil is injected by an external hydraulic station through an oil inlet, and the high-temperature lubricating oil is sucked out by the oil outlet pipe; the sealing sleeve is sleeved outside the rotating shaft, the lower end of the sealing sleeve is in contact with the bottom of the oil tank, the upper end of the sealing sleeve stretches into the space between the thrust head and the rotating shaft, and the height of the sealing sleeve is higher than the liquid level of lubricating oil.
2. The test device of claim 1, further characterized in that the bearing test device further comprises a seal upper gland, an upper end cap packing seal, a tank upper end cap, a tank, a lower end cap packing seal, a tank lower end cap, a seal lower gland; the upper end cover of the oil tank seals the upper port of the oil tank, and the lower end cover of the oil tank seals the lower port of the oil tank; the rotating shaft penetrates through the upper end cover of the oil tank and the lower end cover of the oil tank, the upper end cover is filled with a filler to seal the upper end cover of the oil tank and the rotating shaft, and the lower end cover is filled with a filler to seal the lower end cover of the oil tank and the rotating shaft; the sealing upper gland is fixedly connected with the upper end cover of the oil tank to compress the packing seal of the upper end cover, and the sealing lower gland is fixedly connected with the lower end cover of the oil tank to compress the packing seal of the lower end cover; the thrust bearing, the thrust bearing fixing ring, the mirror plate and the measuring system are all arranged in the oil tank, and the thrust bearing fixing ring is fixedly connected relative to the oil tank.
3. The test device according to claim 2, further characterized in that the oil tank has a cylindrical structure with flange openings arranged up and down, an upper end cover of the oil tank is connected with an upper end flange of the oil tank through bolts, and a lower end cover of the oil tank is connected with a lower end flange of the oil tank through bolts; the outside of the bearing fixing ring is provided with a flange ring which is fixedly clamped between the upper flange ring of the oil tank and the upper end cover of the oil tank so as to fix the position of the bearing fixing ring.
4. The test device of claim 1, further characterized in that the test stand comprises three layers of stand partitions, a stand top plate, a plurality of stand beams, and four columns; the four stand columns (25) support the three-layer stand frame partition plates and the stand top plate into a laminated plate structure, the stand beam is connected between the four stand columns and used for positioning between every two stand columns, and the transverse support three-layer stand frame partition plates and the stand top plate are fixed; the transmission system is arranged on the rack top plate, the bearing testing device is arranged between the first rack partition plate and the second rack partition plate, and the loading system is arranged between the second rack partition plate and the third rack partition plate.
5. The test device of claim 4, further comprising a test bed base, wherein a first positioning bearing is arranged between the first bed separator and the bed top plate, a second positioning bearing is arranged on the test bed base, and the upper end and the lower end of the rotating shaft are respectively positioned and installed through the first positioning bearing and the second positioning bearing.
6. The test device of claim 5, further characterized in that the transmission system comprises an ac motor, a motor cover, and a coupling, wherein the motor cover is mounted on the upper portion of the test stand and completely surrounds the ac motor, and an output shaft of the ac motor is in transmission connection with the rotating shaft through the coupling.
7. The test device of claim 1, further characterized in that a plurality of bearing back holes are formed, and a temperature sensor is arranged in each bearing back hole; the through holes of the mirror plate are formed at equal intervals along the radial direction of the through holes.
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