CN114646466B - Rolling bearing test equipment with load and assembly double simulation - Google Patents
Rolling bearing test equipment with load and assembly double simulation Download PDFInfo
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- CN114646466B CN114646466B CN202210331260.1A CN202210331260A CN114646466B CN 114646466 B CN114646466 B CN 114646466B CN 202210331260 A CN202210331260 A CN 202210331260A CN 114646466 B CN114646466 B CN 114646466B
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- 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
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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
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Abstract
The invention belongs to the technical field of bearing test, and provides rolling bearing test equipment with double simulation of load and assembly. The assembly simulation device and the loading system provided by the invention can simulate the parallel misalignment state and the angle misalignment state of the bearing and the axial loading and radial loading of the bearing, thereby realizing the assembly simulation of the tested bearing with 3 degrees of freedom.
Description
Technical Field
The invention belongs to the technical field of bearing testing, and particularly relates to a bearing testing device capable of applying radial force and axial force and simulating bearing assembly errors.
Background
The rolling bearing is an important part of the rotary machine, the performance of the rolling bearing directly influences the performance of equipment, the testing and testing device of the performance of the bearing is extremely important, and the bearing bears radial or axial load from the bearing angle, but the assembly error inevitably exists in the assembly process, so the rolling bearing has important significance for the bearing and the performance test under the assembly.
At present, most of bearing test devices adopt testers under loading (axial, radial and the like) conditions (such as a rolling bearing test stand in patent number 202021624769.8 and a rolling bearing test stand in patent number 202021190892.3).
The assembly simulation of the bearing comprises parallel misalignment and angle misalignment, the simulation is carried out from rotor misalignment at present, and the shaft misalignment simulation angles (such as a propulsion shaft misalignment fault simulation device and misalignment adjustment method in patent number 202110712928.2, a support structure for simulating a shaft misalignment detection device in patent number 202021698451.4, a detection and adjustment method for shaft misalignment of a turbine generator set in patent number 201910672669.8, a gear transmission system axis misalignment fault simulation experiment table in patent number 201910812807.8) are adopted, for example (such as a parallel misalignment continuously adjustable rotor fault simulation mechanism in patent number 201710075680.7, a continuously adjustable angle misalignment rotor fault simulation mechanism in patent number 201710152046.9) and the like in the field of bearing elevation adjustment of bearings in Zhao An and the like, the elevation of a supporting object is changed through relative movement of a conical sliding block (such as a rotary mechanical bearing elevation online adjustment device in patent number 200910303519.6); han Qingkai et al use a pivot misalignment from a rotor assembly perspective to simulate rotor misalignment (as shown in patent 201610489309.0 for a rotor system with a pivot misalignment adjustment). At present, a bearing test device can only realize bearing loading load, but cannot realize misalignment load, and most of bearing misalignment is realized on a rotor test bed, and a double-simulation synchronous tester capable of carrying out loading and assembling is lacked, so that special rolling bearing test equipment with double simulation of loading and assembling is required from the aspect of loading and assembling bearing test.
Disclosure of Invention
The device aims at solving the defects of the prior art, provides rolling bearing test equipment with an assembly simulation device 4 and a loading device and a test method, can simulate the horizontal misalignment state and the multi-angle misalignment state of a bearing, and the axial loading and the radial loading of the bearing, and can develop vibration test research.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the rolling bearing test equipment with the double simulation of load and assembly mainly comprises a driving device 1, a main shaft supporting device 2, a tested bearing device 3, an assembly simulation device 4, a loading device 5, a bearing test box 6, a test system 7 and a T-shaped table 8;
the driving device 1 provides driving force for rolling bearing test equipment and mainly comprises a diaphragm coupler 11, a motor bracket 12 and a driving motor 13; one end of the diaphragm coupler 11 is connected with an output shaft of the driving motor 13, and the other end of the diaphragm coupler is connected with the main shaft 212 and is used for transmitting driving force between the driving motor 13 and the main shaft 212; the upper surface of the motor bracket 12 is fixedly connected with the ground pin of the driving motor 13 through bolts, and the lower surface of the motor bracket 12 is fixedly connected with the T-shaped table 8 through T-shaped bolts for supporting the driving motor 13; the driving motor 13 is driven by a variable frequency motor, so that the output rotating speed of the driving motor 13 is conveniently adjusted, and the rotating speed of the main shaft 212 is controlled;
The main shaft supporting device 2 is used for transmitting driving force between the driving device 1 and the tested bearing device 3 and providing supporting force for the tested bearing device 3, and mainly comprises a first supporting bearing 21, a second supporting bearing 22, a main shaft supporting sleeve 23, a sealing lock nut 24, a first supporting bearing oil nozzle 25, a main shaft sleeve 26, a supporting bearing spacer 27, a second supporting bearing oil nozzle 28, a second supporting bearing penetrating cover 29, a first supporting bearing penetrating cover 210, a sealing pressing plate 211 and a main shaft 212; flanges are arranged on two sides of the main shaft support sleeve 23 and are connected with a main shaft system protective box 61 and a box seat 62, and a first support bearing 21 and a second support bearing 22 are arranged in the middle hole of the main shaft support sleeve 23 and are respectively positioned at two ends of the main shaft support sleeve 23; the first support bearing transparent cover 210 and the second support bearing transparent cover 29 are correspondingly arranged outside the first support bearing 21 and the second support bearing 22, the first support bearing oil nozzle 25 is fixed on an oil inlet hole of the first support bearing transparent cover 210, and the second support bearing oil nozzle 28 is fixed on an oil inlet hole of the second support bearing transparent cover 29 and is used for providing lubricating oil for the first support bearing 21 and the second support bearing 22; the main shaft 212 is positioned in the main shaft supporting sleeve 23, and a main shaft sleeve 26 is sleeved on a main shaft part in the main shaft supporting sleeve 23; the sealing pressing plate 211 is positioned outside the first support bearing transparent cover 210 and is matched with the first support bearing transparent cover 210 for sealing the main shaft support device 2; the left end of the sealing pressing plate 211 is contacted with the sealing locking nut 24, the right end is contacted with the inner ring of the first support bearing 21, and the sealing locking nut 24 is matched with the main shaft 212 for adjusting the axial position of the sealing pressing plate 211; the sealing pressing plate 211 is used for transmitting axial force between the sealing lock nut 24 and the inner ring of the first support bearing 21 so as to axially position the inner ring of the first support bearing 21; the supporting bearing spacer 27 is positioned between the two bearings of the second supporting bearing 22, and the left end and the right end of the supporting bearing spacer are respectively contacted with the inner ring and the outer ring of the two supporting bearings to prevent the two supporting bearings from being directly contacted;
The tested bearing device 3 is used for installing a tested piece and a sensor and mainly comprises a tested bearing seat 31, a tested bearing outer ring sleeve 32, a first tested bearing through cover 33, a tested bearing inner ring sleeve 34, a tested bearing 35, a second tested bearing end cover 36 and a fixing plate 37; the ground feet of the tested bearing seat 31 are connected with the top sizing block 41, and a through hole is formed in the radial position of the tested bearing seat 31 and used for placing a sensor; one side surface of the tested bearing seat 31 is connected with the fixed plate 37 through a bolt and is used for realizing the installation of the axial loading device 52 and the force sensor; the other side surface of the tested bearing seat 31 is connected with the tested bearing outer ring sleeve 32, the tested bearing outer ring sleeve 32 is matched and fixed with the tested bearing 35, the inner ring of the tested bearing 35 is matched and fixed with the outer ring of the tested bearing inner ring sleeve 34, and the tested bearing 35 is fixed through the second tested bearing end cover 36; the first tested bearing through cover 33 is fixedly arranged on the outer side of the tested bearing outer ring sleeve 32; the replacement of the tested piece with different types is realized by replacing the tested bearing inner ring sleeve 34 and the tested bearing outer ring sleeve 32;
the assembly simulation device 4 comprises a parallel misalignment simulation device and an angle misalignment error simulation device;
the parallel misalignment simulation device is used for meeting the coaxiality requirement of the central axis of the tested bearing 35 and the central axis of the main shaft 212, and mainly comprises a top sizing block 41, a wedge-shaped adjusting block 42, a sizing block base 43, an adjusting screw 44, a connecting bolt 451, a nut 452, a spring 453 and a sizing block guide column 46; the upper surface of the top sizing block 41 is connected with the tested bearing seat 31, and the lower surface of the top sizing block 41 is matched with the contact surface of the wedge-shaped adjusting blocks 42 and is connected with the two wedge-shaped adjusting blocks 42; the two wedge-shaped adjusting blocks 42 are respectively in reverse fit with threads on two sides of the adjusting screw 44 and are used for adjusting the distance between the two wedge-shaped adjusting blocks 42; the wedge-shaped adjusting block 42 is driven to move by rotating the adjusting screw rod 44, so that the tested bearing 35 moves up and down in the vertical direction, the coaxiality requirement of the central axis of the tested bearing 35 and the central axis of the main shaft 212 is met, the parallel misalignment simulation of the tested bearing 35 is realized, and the misalignment degree is directly calculated by adjusting the tightening turns of the screw rod 44; in addition, the adjusting screw 44 is matched with the space position and sealing of the box seat 62 and the adjusting screw 44 at the same time, so that the adjusting screw 44 is adjusted outside the box body, and the parallel misalignment simulation of the tested bearing 35 can be adjusted without disassembling the box body; the connecting bolt 451 is connected with the sizing block base 43 through a through hole of the top sizing block 41, and the spring 453 is sleeved on the connecting bolt 451 to be contacted with the upper surface of the top sizing block 41 and fixed through a hexagonal nut 452, so as to realize pre-compression on the top sizing block 41; four guide posts 46 are arranged between the sizing block base 43 and the top sizing block 41 and are uniformly distributed on two sides, so that the top sizing block 41 moves along the vertical direction and has a certain guide function; the sizing block base 43 is of a boss structure, a rectangular groove is formed in the boss, and the wedge-shaped adjusting block 42 moves along a fixed track formed by the rectangular groove and has a certain guiding function; one side of the sizing block base 43 protrudes, and is provided with a through hole for inserting an adjusting screw 44;
The angle misalignment error simulation device is used for simulating angle deflection of 2 degrees of freedom and mainly comprises an angle adjustment device 47, an adjustment bolt 471, a gasket 472, a hexagon socket head cap screw 473 and an angle adjustment screw 474; the two angle adjusting devices 47 are symmetrically installed on the upper surface of the top sizing block 41; the adjusting bolt 471 is connected with the top sizing block 41 through the matching of the gasket 472 and the hexagon socket head cap screw 473, the angle adjusting screw 474 is arranged on the side surface of the angle adjusting device 47, the output end of the angle adjusting screw 474 is propped against the tested bearing device 3, the tested bearing device 3 is deflected through rotating the angle adjusting screw 474, so that the angle misalignment simulation of the tested bearing 35 is realized, and the deflection angle is directly calculated through adjusting the number of turns of the angle adjusting screw 474; in addition, the angle adjusting screw 474 is simultaneously matched with the first box observing window 611 and the second box observing window 612, so that the angle misalignment simulation of the tested bearing 35 can be adjusted without disassembling the box after the box and the tested piece are assembled;
the loading device 5 is used for providing a radial load and an axial load required by test equipment and mainly comprises a radial loading device 51 and an axial loading device 52; the radial loading device 51 is used for providing a required radial load for the test device, and mainly comprises a hydraulic cylinder 511, an O-shaped ring 512, a first hexagonal nut 513, an S-column type pressure sensor 514, a second hexagonal nut 515 and a pad 516, wherein the radial loading device 51 is arranged at a through hole 66 of the radial loading device and is fixedly connected with a protective box 63 of the tested device through bolts, the radial load loading is realized through controlling the radial hydraulic cylinder 511, and the radial load loading is realized more conveniently and accurately by combining with the S-column type pressure sensor 514; the O-shaped ring 512 is matched with the hydraulic cylinder 511 to realize a sealing function; the upper part of the S-column type pressure sensor 514 is connected with the hydraulic cylinder 511 and is fixed through a first hexagonal nut 513, the lower part of the S-column type pressure sensor is connected with a pad 516 and is fixed through a second hexagonal nut 515, and the S-column type pressure sensor is used for testing the applied radial load; when the radial load is required to be applied to the test device, the hydraulic cylinder 511 drives the s-column type pressure sensor 514 and the pad 516 to press the tested bearing seat 31, so that the radial load in the vertical direction is generated; during loading, the assembly simulation module needs to be canceled; firstly, loosening a bearing seat fixing bolt; then the adjusting screw 44 is rotated to enable the tested bearing device 3 to fall to the lowest end, and a displacement allowance is reserved for radial loading;
The axial loading device 52 is used for providing a required axial load for the test device, and mainly comprises an axial hydraulic cylinder 521, an inner hexagonal cylindrical head screw 522, a hexagonal nut 523, a Y-shaped joint 524, a pin 525, a cotter pin 526, a spoke connection lifting lug 527, a fourth hexagonal nut 528 and a spoke pressure sensor 529; the axial loading device 52 is arranged at the axial loading device through hole 67 and is fixedly connected with the axial connecting box 64 through bolts, radial load loading is realized through controlling the axial hydraulic cylinder 521, and axial load loading is realized by combining with the spoke pressure sensor 529; the axial hydraulic cylinder 521 is connected with the axial connecting box 64 through a hexagon socket head cap screw 522, the bottom of the axial hydraulic cylinder 521 is connected with a Y-shaped joint 524, and the axial hydraulic cylinder 521 is fixed through a hexagon nut 523; one end of a spoke connection lifting lug 527 is connected with a spoke pressure sensor 529 and is fixed through a fourth hexagonal nut 528, and the other end of the spoke connection lifting lug 527 is matched with the Y-shaped joint 524 and is fixed through a pin 525; cotter pins 526 are inserted into holes of pins 525 for anti-loosening; the spoke pressure sensor 529 is coupled to the fixed plate 37 by screws; when the axial load is required to be applied to the test device, the axial hydraulic cylinder 521 drives the spoke pressure sensor 529 to transmit the axial load to the fixed plate 37 and the tested bearing seat 31, and the size of the applied axial load is tested through the spoke pressure sensor 529, so that the loading of the axial load is realized; during loading, the assembly simulation module needs to be canceled;
The bearing test box 6 is used for installing parts of various systems and mainly comprises a main shaft system protective box 61, a box seat 62, a tested device protective box 63, an axial connecting box 64, a main shaft system observation window 65, a radial loading device through hole 66, an axial loading device through hole 67, a plugging plug 68, an oil discharging plug 69, an oil pipe installation wiring hole 610, a box body observation window one 611, a box body observation window two 612, an oil seal 613 and a plugging plug cap 614; the top of the spindle system protective box 61 is provided with a spindle system observation window 65 which is convenient for observing the running state of the spindle system; the spindle system protective box 61 and the tested device protective box 63 are detachable, so that a tested piece can be conveniently disassembled and assembled, and a sensor can be conveniently installed; the tested device protecting box 63 is fixedly connected with the box seat 62 through bolts and is used for fixing the bearing radial loading device 51; the axial connecting box 64 is fixedly connected with the tested device protecting box 63 and the box seat 62 through bolts and is used for fixing the bearing axial loading device 52; a sealing plug 68 is arranged at the joint of the axial connecting box 64 and the adjusting screw 44, and an oil seal 613 is arranged at the joint of the sealing plug 68 and the adjusting screw 44, so that the loss of lubricating oil is prevented; the two sides of the box seat 62 and the device under test protection box 63 are respectively provided with a lower observation window 611 and an upper observation window 612, the lower observation window 611 and the upper observation window 612 are provided with oil pipe installation wiring holes 610, and the oil pipe installation wiring holes 610 are used for oil inlet pipe installation, sensor wiring and adjustment assembly; the bottom of the box seat 62 is provided with an oil return hole for lubricating oil return, and the oil return hole is provided with an oil discharging plug 69 for cooling and lubricating the first support bearing 21, the second support bearing 22 and the tested bearing 35, so that the running stability and the service life of the tested bearing 35 are improved; the bottom of the box seat 62 is fixed on the T-shaped table 8 through a T-shaped bolt, the inner part of the box seat 62 is divided into a box body supporting part and a tested part, and the two working areas are fully isolated to prevent the mutual pollution to the working environment;
The test system 7 enables the rolling bearing test equipment to be used for test research of vibration response characteristics of the outer ring and the retainer under the variable working condition of the bearing under the rotating condition by installing an acceleration sensor, a thermocouple sensor and an eddy current sensor on the tested bearing device 3; the test system 7 is mainly composed of a first acceleration sensor 71, a second acceleration sensor 72, a third acceleration sensor 73, a thermocouple sensor 74, and an eddy current sensor 75; the first acceleration sensor 71 is installed in the vertical direction of the tested bearing seat 31 and is used for measuring the vibration characteristics of the shell of the tested bearing seat 31; the second acceleration sensor 72 is arranged in the measuring hole of the tested bearing seat 31 and is used for measuring the vibration characteristic of the tested bearing outer ring sleeve 32; the third acceleration sensor 73 is arranged in the measuring hole of the outer ring sleeve 32 of the tested bearing and is used for measuring the vibration characteristic of the outer ring of the tested bearing 35; the thermocouple sensor 74 is arranged in the measuring hole of the outer ring sleeve 32 of the tested bearing and is used for measuring the temperature characteristic of the outer ring of the tested bearing 35; an eddy current sensor 75 is disposed in the measuring hole of the first test bearing cover 33 with its measuring end disposed opposite to the end face of the holder for measuring the vibration characteristics of the holder of the test bearing 35.
The invention has the beneficial effects that:
(1) The assembly simulation device and the loading system can simulate the parallel misalignment state and the angle misalignment state of the bearing and the axial loading and radial loading of the bearing, thereby realizing the assembly simulation of the tested bearing with 3 degrees of freedom;
(2) The invention has the parallel misalignment simulation device, the wedge-shaped adjusting block is driven by rotating the adjusting screw rod, so that the vertical movement of the tested bearing is realized, the coaxiality requirement of the central axis of the tested bearing and the central axis of the main shaft is met, the parallel misalignment simulation of the tested bearing is realized, and the misalignment degree can be directly calculated by adjusting the tightening turns of the screw rod; in addition, the design of the box body, the space position of the adjusting screw rod, the sealing and the like are matched, the adjusting screw rod can be adjusted outside the box body, the parallel misalignment simulation of the tested bearing can be adjusted without disassembling the box body, and the influence of the test device on the test effect due to frequent disassembly and assembly is avoided;
(3) According to the angle misalignment simulation device, the bearing seat is subjected to angle deflection around the Y axis by rotating the two angle adjustment screw devices in the same direction; the bearing seat is subjected to angle deflection around the Z axis by reversely rotating the two angle adjusting screw devices, so that the misalignment simulation of the tested bearing angle is realized, and the deflection angle can be directly calculated through the number of turns of the adjusting screw; in addition, the design of the box observation window is matched, so that the angle misalignment simulation of the tested bearing can be realized without disassembling the box after the box and the tested bearing are assembled;
(4) The main shaft supporting device and the tested bearing device provided by the invention realize the replacement of the supporting bearing and the model of the tested bearing by replacing the bearing sleeves (the inner ring sleeve and the outer ring sleeve), thereby meeting the test of various bearing models and meeting the rotating speed requirement required by the research of the tested bearing; in addition, the main shaft supporting device adopts a separated supporting sleeve, the supporting device is replaced under the condition of small change as much as possible, and the integrated supporting sleeve is simple to process and convenient to replace;
(5) According to the test system, the acceleration sensor, the thermocouple sensor and the eddy current sensor are arranged on the tested bearing device, so that the test equipment can be used for test research on vibration response characteristics of the outer ring and the retainer under the variable working condition (rotating speed and load) of the bearing under the rotating condition;
(6) According to the bearing test box provided by the invention, the two sides of the box seat are respectively provided with the side windows, the side windows are provided with the oil inlet pipe mounting holes and the sensor wiring holes, the bottom of the box seat is provided with the oil return holes for lubricating oil return, and the through holes of the adjusting screw rod, so that the requirements of tests such as lubrication pipelines, sensor wiring, adjustment assembly and the like are met.
Drawings
FIG. 1 is a schematic diagram of a test apparatus according to the present invention;
FIG. 2 is a schematic cross-sectional view of the structure of the test device of the present invention;
FIG. 3 is a cross-sectional view of a spindle assembly of the test device of the present invention;
FIG. 4 is a schematic diagram of a test piece device structure of the test device of the present invention;
FIG. 5 is an exploded view of a test piece device of the present invention;
FIG. 6 is a cross-sectional view of a test device of the present invention;
FIG. 7 is a schematic diagram of a parallel misalignment simulation apparatus of the test apparatus of the present invention;
FIG. 8 is an exploded view of a simulation device for parallel misalignment of a test apparatus of the present invention;
FIG. 9 is a schematic diagram of a simulation of a parallel misalignment simulation of a test apparatus of the present invention;
FIG. 10 is a schematic diagram of a test apparatus angle misalignment simulation apparatus according to the present invention;
FIG. 11 is an exploded view of a simulation device with the test device of the present invention angularly misaligned;
FIG. 12 is a schematic diagram of a simulation device for angular misalignment of a test apparatus of the present invention;
FIG. 13 is a schematic diagram of a simulation device for angular misalignment of a test apparatus of the present invention;
FIG. 14 is an assembled view of the adjusting device and the case of the present invention;
FIG. 15 is a schematic view of the loading device structure of the test device of the present invention;
FIG. 16 is a schematic cross-sectional view of a loading device of the test device of the present invention;
FIG. 17 is an exploded view of a radial loading device of the test device of the present invention;
FIG. 18 is an exploded view of an axial loading device of the test device of the present invention;
FIG. 19 is a layout view of oil holes in a window of a box according to the present invention;
FIG. 20 is a sensor layout of the test device of the present invention.
In the figure, a driving device 1, a main shaft supporting device 2, a tested bearing device 3, an assembly simulation device 4, a loading device 5, a bearing test box 6, a test system 7, an 8T-shaped table, a diaphragm coupling 11, a motor bracket 12 and a driving motor 13; 21 first support bearing, 22 second support bearing, 23 spindle support sleeve, 24 seal lock nut, 25 support bearing nipple, 26 spindle sleeve, 27 support bearing spacer, 28 support bearing nipple, 29 second support bearing cap, 210 first support bearing cap, 211 seal pressure plate, 212 spindle, 31 tested bearing seat, 32 tested bearing outer ring sleeve, 33 first tested bearing cap, 34 tested bearing inner ring sleeve, 35 tested bearing, 36 second tested bearing end cap, 37 fixed plate, 41 top sizing block, 42 wedge adjustment block, 43 sizing block base, 44 adjustment screw, 451 connection bolt, 452 nut, 453 spring, 46 sizing block guide post, 47 angle adjustment device, 471 adjustment bolt, 472 spacer, 473 inner hexagonal cylindrical head screw, 474 angle adjustment screw, 474-1 first angle adjustment screw, 474-2 second angle adjustment screw, 51 radial loading device, 52 axial loading device, 511 radial hydraulic cylinder, 512O-ring, 513 first hexagonal nut, 514 s-column pressure nut, 515 second hexagonal head screw, 515 axial hexagonal head screw, 451 connection bolt, 452 nut, 453 spring, 46 sizing block guide post, 47 angle adjustment device, 471 adjustment screw, 472 spacer, 473 inner hexagonal head screw, 474-1 first angle adjustment screw, 474-2 second angle adjustment screw, 51 radial loading device, 52 axial loading device, 511 axial hydraulic cylinder, 512 axial force sensor, 512, bore, 524, square head cap, roll, etc.; the device comprises a 61 main shaft system protection box, a 62 box seat, a 63 tested device protection box, a 64 axial connection box, a 65 main shaft system observation window, a 66 radial loading device through hole, a 67 axial loading device through hole, a 68 plugging plug, a 69 oil discharging plug, a 610 oil pipe installation wiring hole, a 611 lower side observation window, a 612 upper side observation window, a 613 oil seal, a 614 plugging plug cap, a 71 first acceleration sensor, a 72 second acceleration sensor, a 73 third acceleration sensor, a 74 thermocouple sensor and a 75 electric vortex sensor.
Detailed Description
Referring to fig. 1 and 2, the rolling bearing test equipment with load and assembly double simulation mainly comprises a driving device 1, a main shaft supporting device 2, a tested bearing device 3, an assembly simulation device 4, a loading device 5, a bearing test box 6, a test system 7 and a T-shaped table 8.
Referring to fig. 2, the driving device 1 is used for providing driving force for a test stand, and mainly comprises a diaphragm coupler 11, a motor bracket 12 and a driving motor 13. One end of the diaphragm coupler 11 is connected with an output shaft of the driving motor 13, and the other end of the diaphragm coupler is connected with the main shaft 212 and is used for transmitting driving force between the driving motor 13 and the main shaft 212; the upper surface of the motor support 12 is fixedly connected with the ground pin of the driving motor 13 through bolts, and the lower surface of the motor support 12 is fixedly connected with the T-shaped table 8 through T-shaped bolts and is used for supporting the driving motor 13; the driving motor 13 is driven by a variable frequency motor, so that the output rotating speed of the driving motor is conveniently adjusted, and the rotating speed of the main shaft 212 is controlled;
referring to fig. 2 and 3, the spindle supporting device 2 is configured to transmit a driving force between the driving device 1 and the tested bearing device 3, and provide a supporting force for the tested bearing device 3, and mainly comprises a supporting bearing 21, a supporting bearing 22, a spindle supporting sleeve 23, a sealing lock nut 24, a supporting bearing nipple 25, a spindle sleeve 26, a supporting bearing spacer 27, a supporting bearing nipple 28, a supporting bearing through cover 29, a supporting bearing through cover 210, a sealing pressing plate 211, and a spindle 212. The main shaft support sleeve 23 is provided with flanges at two sides, the flanges are connected with the main shaft system protective box 61 and the box seat 62, the middle hole of the main shaft support sleeve 23 is used for internally arranging the support bearing 21 and the support bearing 22, the main shaft support sleeve 23 can be changed under the condition of small change as much as possible, and the integral support sleeve is simple to process and convenient to detach and change; the supporting bearing oil nozzle 25 is fixed on an oil inlet hole of the supporting bearing transparent cover 210, and the supporting bearing oil nozzle 28 is fixed on an oil inlet hole of the supporting bearing transparent cover 29 and is used for providing lubricating oil for the supporting bearings 21 and 22;
Referring to fig. 4, 5 and 6, the tested bearing device 3 is used for installing a tested piece and installing a test sensor, and mainly comprises a tested bearing seat 31, a tested bearing outer ring sleeve 32, a tested bearing through cover 33, a tested bearing inner ring sleeve 34, a tested bearing 35, a tested bearing end cover 36 and a fixing plate 37. The ground feet of the tested bearing seat 31 are connected with the top sizing block 41, and a through hole is formed in the radial position of the bearing seat for placing a sensor; the right side of the tested bearing seat 31 is connected with a fixed plate 37, and the fixed plate 37 is fixedly connected with the tested bearing seat 31 through bolts and is used for realizing the installation of an axial loading device 52 and a force sensor; the left side of the tested bearing seat 31 is fixedly connected with the tested bearing outer ring sleeve 32, the tested bearing outer ring sleeve 32 is fixedly matched with the tested bearing 35, the tested bearing 35 inner ring is fixedly matched with the tested bearing inner ring sleeve 34, the tested bearing inner ring sleeve 34 and the tested bearing outer ring sleeve 32 are replaced, the tested pieces of different types can be replaced, the tested pieces can be replaced without greatly changing the tested bearing device 3, and the installation and the replacement are more convenient;
referring to fig. 7, 8 and 9, the parallel misalignment simulation device is used for meeting the coaxiality requirement of the axle wire of the tested bearing and the axle wire of the main shaft, and mainly comprises a top sizing block 41, a wedge-shaped adjusting block 42, a sizing block base 43, an adjusting screw 44, a connecting bolt 451, a nut 452, a spring 453 and a sizing block guide post 46. The upper surface of the top sizing block 41 is connected with the tested bearing seat 31, the lower surface of the top sizing block 41 is connected with the wedge-shaped adjusting block 42, and the wedge-shaped adjusting block 42 is reversely matched with threads on two sides of the adjusting screw 44 and is used for adjusting the distance between the wedge-shaped adjusting blocks 42; the wedge-shaped adjusting block 42 is driven to move by rotating the adjusting screw rod 44, so that the tested bearing 35 moves up and down in the vertical direction, the coaxiality requirement of the central axis of the tested bearing 35 and the central axis of the main shaft 212 is met, the parallel misalignment simulation of the tested bearing 35 is realized, and the misalignment degree can be directly calculated by adjusting the tightening turns of the screw rod 44; in addition, by simultaneously matching the designs of the space position, sealing and the like of the box seat 62 and the adjusting screw 44, the adjusting screw 44 can be adjusted outside the box body, and the parallel misalignment simulation of the tested bearing 35 can be adjusted without disassembling the box body;
The connecting bolt 451 is connected with the sizing block base 43 through a through hole of the top sizing block 41, and the spring 453 is sleeved on the connecting bolt 451 to be in contact with the top sizing block 41 and fixed through a hexagonal nut 452, so as to realize pre-compression on the top sizing block 41; four guide posts 46 are arranged between the sizing block base 43 and the top sizing block 41 and are uniformly distributed on two sides, so that the top sizing block 41 moves along the vertical direction, and a certain guide effect is achieved. The grooves of the sizing block base 43 are designed into a rectangle, so that the wedge-shaped adjusting block 42 moves along the fixed track and has a certain guiding function.
Referring to fig. 10, 11, 12, 13 and 14, the angular misalignment simulation apparatus is used for simulating 2-degree-of-freedom angular deflection, and mainly comprises an angular adjustment apparatus 47, an adjustment bolt 471, a gasket 472, a hexagon socket head cap screw 473 and angular adjustment screws 474 (474-1, 474-2). The adjusting bolt 471 is fixedly connected with the top sizing block 41 through the hexagon socket head cap screw 472, and the tested bearing device 3 is deflected through the rotating angle adjusting screw 474, so that the angle misalignment simulation of the tested bearing 35 is realized, and the deflection angle can be directly calculated through the number of turns screwed by the adjusting angle adjusting screw 474.
Referring to fig. 12, if the angle adjusting screw 474-1 and the angle adjusting screw 474-2 are simultaneously rotated inward, the bearing device 3 to be tested can be angularly deflected around the Y axis by the angle ofAlpha, the deflection direction is beta (clockwise), and the deflection angle can be expressed as
Referring to fig. 13, when the angle adjustment screw 474-1 is turned in the positive X-axis direction and the angle adjustment screw 474-2 is turned in the negative X-axis direction, the bearing device 3 to be tested is deflected counterclockwise about the Z-axis by an angle θ, which can be expressed as
Similarly, if the adjustment screw 474-1 is turned in the negative X-axis direction and the angle adjustment screw 474-2 is turned in the positive X-axis direction, the bearing device 3 to be tested can be deflected clockwise about the Z-axis. In addition, the design of the box body observation window 611 and the box body observation window 612 is matched, so that the angle misalignment simulation of the tested bearing 35 can be realized without disassembling the box body after the box body and the tested piece are assembled;
with reference to fig. 15, the loading device 5 is used for providing the required radial load and axial load for the test equipment, and mainly comprises a radial loading device 51 and an axial loading device 52. With reference to fig. 16 and 17, the radial loading device 51 is used for providing a radial load required by the test device, and mainly comprises a hydraulic cylinder 511, an o-ring 512, a hexagonal nut 513, an s-pillar type pressure sensor 514, a hexagonal nut 515 and a pad 516. The radial loading device 51 is installed at the radial loading device through hole 66, and is fixedly connected with the tested device protection box 63 through bolts, so that radial load loading can be realized through controlling the radial hydraulic cylinder 511, and the radial load loading is realized more conveniently and accurately by combining with the S-column pressure sensor 514. The O-shaped ring 512 is matched with the hydraulic cylinder 511 to realize a sealing function; the upper part of the S-column pressure sensor 514 is connected with the hydraulic cylinder 511 and fixed by a hexagonal nut 513, and the lower part is connected with a pad 516 and fixed by the hexagonal nut 515 for testing the applied radial load. When the radial load is required to be applied to the test device, the hydraulic cylinder 511 drives the s-column type pressure sensor 514 and the pad 516 to press the tested bearing seat 31, so that the radial load in the vertical direction is generated. During loading, the assembly simulation module needs to be canceled. Firstly, loosening a bearing seat fixing bolt; then the adjusting screw 44 is rotated to enable the tested bearing device 3 to fall to the lowest end, and a displacement allowance is reserved for radial loading.
Referring to fig. 18, the axial loading device 52 is configured to provide a required axial load for the test device, and mainly comprises an axial hydraulic cylinder 521, an inner hexagonal cylinder head screw 522, a third hexagonal nut 523, a y-joint 524, a pin 525, a cotter pin 526, a spoke connection lifting lug 527, a hexagonal nut 528, and a spoke pressure sensor 529. The axial loading device 52 is installed at the axial loading device through hole 67 and is fixedly connected with the axial connection box 64 through bolts, radial load loading can be achieved through control of the axial hydraulic cylinder 521, and axial load loading is achieved more conveniently and accurately by combining with the spoke pressure sensor 529. The axial hydraulic cylinder 521 is fixedly connected with the axial connecting box 64 through an inner hexagonal socket head cap screw 522, the bottom of the axial hydraulic cylinder 521 is connected with a Y-shaped joint 524, and the axial hydraulic cylinder 521 is fixed through a third hexagonal nut 523; the left side of the spoke connection lifting lug 527 is connected with a spoke pressure sensor 529, is fixed through a hexagonal nut 528, and the right side of the spoke connection lifting lug 527 is matched with the Y-shaped joint 524 and is fixed through a pin 525; the cotter 526 is inserted into a hole of the pin 525 for preventing loosening. The spoke pressure sensors 529 are coupled to the fixed plate 37 by screws. When the axial load is required to be applied to the test device, the axial hydraulic cylinder 521 drives the spoke pressure sensor 529 to transmit the axial load to the fixed plate 37 and the tested bearing seat 31, and the size of the applied axial load is tested through the spoke pressure sensor 529, so that the loading of the axial load is more conveniently and accurately realized. During loading, the assembly simulation module needs to be canceled.
Referring to fig. 1, 14 and 19, the bearing test box 6 is used for installing components of each system, and mainly comprises a main shaft system protection box 61, a box seat 62, a tested device protection box 63, an axial connection box 64, a main shaft system observation window 65, a radial loading device through hole 66, an axial loading device through hole 67, a plugging plug 68, an oil discharging plug 69, an oil pipe installation wiring hole 610, a lower side observation window 611, an upper side observation window 612, an oil seal 613 and a plugging plug cap 614; a spindle system observation window 65 is arranged at the top of the spindle system protection box 61, so that the running state of the spindle system can be observed conveniently; the spindle system protective box 61 and the tested device protective box 63 are detachable, so that the operations of disassembling and assembling a tested piece, installing a sensor and the like are facilitated; the tested device protection box 63 is fixedly connected with the box seat 62 through bolts and is used for fixing the bearing radial loading device 51; the axial connecting box 64 is fixedly connected with the tested device protecting box 63 and the box seat 62 through bolts and is used for fixing the bearing axial loading device 52; a sealing plug 68 is arranged at the joint of the axial connecting box 64 and the adjusting screw 44, and an oil seal 613 is arranged at the joint of the sealing plug 68 and the adjusting screw 44, so that the loss of lubricating oil is prevented; the two sides of the box seat 62 and the protecting box 63 of the tested device are respectively provided with an observation window 611 and an observation window 612, the observation windows 611 and 612 are provided with an oil pipe installation wiring hole 610, and the oil pipe installation wiring hole 610 is used for testing oil inlet pipe installation, sensor wiring, adjustment assembly and the like; the bottom of the box seat 62 is provided with an oil return hole for returning lubricating oil, and the oil return hole is provided with an oil discharging plug 69 for cooling and lubricating the main shaft support bearings 21 and 22 and the tested bearing 35, thereby improving the running stability and the service life of the bearing. The bottom of the box seat 62 is fixed on the T-shaped table 8 through a T-shaped bolt, the inner part of the box seat 62 is divided into a box body supporting part and a tested part, and the two working areas are fully isolated to prevent the mutual pollution to the working environment;
With reference to fig. 20, the test system 7 is provided with an acceleration sensor, a thermocouple sensor and an eddy current sensor on the tested bearing device 3, so that the test equipment can be used for testing and researching vibration response characteristics of the outer ring and the retainer under variable working conditions (rotating speed and load) under the bearing rotation condition; mainly comprises an acceleration sensor 71, an acceleration sensor 72, an acceleration sensor 73, a thermocouple sensor 74 and an eddy current sensor 75. The acceleration sensor 71 is installed in the vertical direction of the tested bearing seat 31 and is used for measuring the vibration characteristics of the shell of the tested bearing seat 31; the acceleration sensor 72 is arranged in a measuring hole of the tested bearing seat 31 and is used for measuring the vibration characteristic of the tested bearing outer ring sleeve 32; the acceleration sensor 73 is arranged in a measuring hole of the outer ring sleeve 32 of the tested bearing and is used for measuring the vibration characteristic of the outer ring of the tested bearing 35; the thermocouple sensor 74 is arranged in the measuring hole of the outer ring sleeve 32 of the tested bearing and is used for measuring the temperature characteristic of the outer ring of the tested bearing 35; the eddy current sensor 75 is disposed in the measuring hole of the bearing cap 33 to be tested, and its measuring end is disposed opposite to the end face of the cage for measuring the vibration characteristics of the cage of the bearing 35 to be tested.
The present invention has been described in terms of embodiments, and it will be appreciated by those of skill in the art that various changes can be made to the features and embodiments, or equivalents can be substituted, without departing from the spirit and scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. Therefore, it is intended that the invention not be limited to the particular embodiment disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (1)
1. The rolling bearing test equipment with the double load and assembly simulation is characterized by comprising a driving device (1), a main shaft supporting device (2), a tested bearing device (3), an assembly simulation device (4), a loading device (5), a bearing test box (6), a test system (7) and a T-shaped table (8);
the driving device (1) provides driving force for rolling bearing test equipment and consists of a diaphragm coupler (11), a motor bracket (12) and a driving motor (13); one end of the diaphragm coupler (11) is connected with an output shaft of the driving motor (13), and the other end of the diaphragm coupler is connected with the main shaft (212) and is used for transmitting driving force between the driving motor (13) and the main shaft (212); the upper surface of the motor bracket (12) is fixedly connected with the ground pin of the driving motor (13) through bolts, and the lower surface of the motor bracket (12) is fixedly connected with the T-shaped table (8) through T-shaped bolts for supporting the driving motor (13); the driving motor (13) is driven by a variable frequency motor, so that the output rotating speed of the driving motor (13) is conveniently adjusted, and the rotating speed of the main shaft (212) is controlled;
The main shaft supporting device (2) is used for transmitting driving force between the driving device (1) and the tested bearing device (3) to provide supporting force for the tested bearing device (3), and consists of a first supporting bearing (21), a second supporting bearing (22), a main shaft supporting sleeve (23), a sealing lock nut (24), a first supporting bearing nipple (25), a main shaft sleeve (26), a supporting bearing spacer (27), a second supporting bearing nipple (28), a second supporting bearing through cover (29), a first supporting bearing through cover (210), a sealing pressing plate (211) and a main shaft (212); flanges are arranged on two sides of the main shaft support sleeve (23), the flanges are connected with a main shaft system protection box (61) and a box seat (62), a first support bearing (21) and a second support bearing (22) are arranged in the middle hole of the main shaft support sleeve (23), and the first support bearing and the second support bearing are respectively arranged at two ends of the main shaft support sleeve (23); the first support bearing through cover (210) and the second support bearing through cover (29) are correspondingly arranged outside the first support bearing (21) and the second support bearing (22), the first support bearing oil nozzle (25) is fixed on an oil inlet hole of the first support bearing through cover (210), and the second support bearing oil nozzle (28) is fixed on an oil inlet hole of the second support bearing through cover (29) and used for providing lubricating oil for the first support bearing (21) and the second support bearing (22); the main shaft (212) is positioned in the main shaft supporting sleeve (23), and a main shaft part in the main shaft supporting sleeve (23) is sleeved with the main shaft sleeve (26); the sealing pressing plate (211) is positioned at the outer side of the first supporting bearing through cover (210) and matched with the first supporting bearing through cover (210) for sealing the main shaft supporting device (2); the left end of the sealing pressing plate (211) is contacted with the sealing locking nut (24), the right end of the sealing pressing plate is contacted with the inner ring of the first support bearing (21), and the sealing locking nut (24) is matched with the main shaft (212) and used for adjusting the axial position of the sealing pressing plate (211); the sealing pressing plate (211) is used for transmitting axial force between the sealing lock nut (24) and the inner ring of the first support bearing (21), so that the inner ring of the first support bearing (21) is axially positioned; the support bearing spacer (27) is positioned between the two bearings of the second support bearing (22), and the left end and the right end of the support bearing spacer are respectively contacted with the inner ring and the outer ring of the two support bearings to prevent the two support bearings from being directly contacted;
The tested bearing device (3) is used for installing a tested piece and a sensor and consists of a tested bearing seat (31), a tested bearing outer ring sleeve (32), a first tested bearing penetrating cover (33), a tested bearing inner ring sleeve (34), a tested bearing (35), a second tested bearing end cover (36) and a fixing plate (37); the ground leg of the tested bearing seat (31) is connected with the top sizing block (41), and a through hole is formed in the radial position of the tested bearing seat (31) and used for placing a sensor; one side surface of the tested bearing seat (31) is connected with the fixed plate (37) through a bolt, and is used for realizing the installation of the axial loading device (52) and the force sensor; the other side surface of the tested bearing seat (31) is connected with the tested bearing outer ring sleeve (32), the tested bearing outer ring sleeve (32) is matched and fixed with the tested bearing (35), the inner ring of the tested bearing (35) is matched and fixed with the outer ring of the tested bearing inner ring sleeve (34), and the tested bearing (35) is fixed through the second tested bearing end cover (36); the first tested bearing penetrating cover (33) is fixedly arranged on the outer side of the tested bearing outer ring sleeve (32); the tested bearing inner ring sleeve (34) and the tested bearing outer ring sleeve (32) are replaced to realize the replacement of tested pieces of different types;
The assembly simulation device (4) comprises a parallel misalignment simulation device and an angle misalignment error simulation device;
the parallel misalignment simulation device is used for meeting the coaxiality requirement of the central axis of a tested bearing (35) and the central axis of a main shaft (212), and consists of a top sizing block (41), a wedge-shaped adjusting block (42), a sizing block base (43), an adjusting screw (44), a connecting bolt (451), a hexagonal nut (452), a spring (453) and a sizing block guide column (46); the upper surface of the top sizing block (41) is connected with the tested bearing seat (31), and the lower surface of the top sizing block (41) is matched with the contact surface of the wedge-shaped adjusting blocks (42) and is connected with the two wedge-shaped adjusting blocks (42); the two wedge-shaped adjusting blocks (42) are respectively in reverse fit with threads on two sides of the adjusting screw rod (44) and are used for adjusting the distance between the two wedge-shaped adjusting blocks (42); the wedge-shaped adjusting block (42) is driven to move by rotating the adjusting screw (44), so that the tested bearing (35) moves up and down in the vertical direction, the coaxiality requirement of the central axis of the tested bearing (35) and the central axis of the main shaft (212) is met, the parallel misalignment simulation of the tested bearing (35) is realized, and the misalignment degree is directly calculated by adjusting the tightening turns of the screw (44); in addition, the adjusting screw (44) is matched with the space position and the seal of the box seat (62) and the adjusting screw (44) at the same time, so that the adjusting screw (44) is adjusted outside the box body, and the parallel misalignment simulation of the tested bearing (35) can be adjusted without disassembling the box body; the connecting bolt (451) is connected with the sizing block base (43) through a through hole of the top sizing block (41), and the spring (453) is sleeved on the connecting bolt (451) to be contacted with the upper surface of the top sizing block (41) and fixed through a hexagonal nut (452) for pre-compacting the top sizing block (41); four sizing block guide columns (46) are arranged between the sizing block base (43) and the top sizing block (41) and are uniformly distributed on two sides, so that the top sizing block (41) moves along the vertical direction and has a certain guide effect; the sizing block base (43) is of a boss structure, a rectangular groove is formed in the boss, and the wedge-shaped adjusting block (42) moves along a fixed track formed by the rectangular groove and has a certain guiding function; one side of the sizing block base (43) protrudes, and a through hole for inserting an adjusting screw rod (44) is formed in the sizing block base;
The angle misalignment error simulation device is used for simulating angle deflection of 2 degrees of freedom and consists of an angle adjustment device (47), an adjustment bolt (471), a gasket (472), a hexagon socket head cap screw (473) and an angle adjustment screw (474); the two angle adjusting devices (47) are symmetrically arranged on the upper surface of the top sizing block (41); the adjusting bolt (471) is connected with the top sizing block (41) through the matching of the gasket (472) and the hexagon socket head cap screw (473), the angle adjusting screw (474) is arranged on the side surface of the angle adjusting device (47), the output end of the angle adjusting screw is propped against the tested bearing device (3), the tested bearing device (3) is deflected through rotating the angle adjusting screw (474), so that the angle misalignment simulation of the tested bearing (35) is realized, and the deflection angle is directly calculated through adjusting the number of turns of screws of the angle adjusting screw (474); in addition, the angle adjusting screw (474) is matched with the lower side observation window (611) and the upper side observation window (612) at the same time, so that the angle misalignment simulation of the tested bearing (35) can be adjusted without disassembling the box body after the box body and the tested piece are assembled;
the loading device (5) is used for providing the required radial load and axial load for test equipment and consists of a radial loading device (51) and an axial loading device (52); the radial loading device (51) is used for providing a required radial load for the test device, consists of a hydraulic cylinder (511), an O-shaped ring (512), a first hexagonal nut (513), an S-column type pressure sensor (514), a second hexagonal nut (515) and a pad foot (516), is arranged at a through hole (66) of the radial loading device, is fixedly connected with a protective box (63) of the tested device through bolts, realizes radial load loading through controlling the radial hydraulic cylinder (511), and is combined with the S-column type pressure sensor (514); the O-shaped ring (512) is matched with the hydraulic cylinder (511) to realize a sealing function; the upper part of the S-column type pressure sensor (514) is connected with the hydraulic cylinder (511) and is fixed through a first hexagonal nut (513), the lower part of the S-column type pressure sensor is connected with the pad foot (516) and is fixed through a second hexagonal nut (515) for testing the applied radial load; when the radial load is required to be applied to the test device, the hydraulic cylinder (511) drives the S-column type pressure sensor (514) and the pad foot (516) to press the tested bearing seat (31) tightly, so that the radial load in the vertical direction is generated; during loading, the assembly simulation module needs to be canceled; firstly, loosening a bearing seat fixing bolt; then, the adjusting screw rod (44) is rotated to enable the tested bearing device (3) to fall to the lowest end, and a displacement allowance is reserved for radial loading;
The axial loading device (52) is used for providing a required axial load for the test device and consists of an axial hydraulic cylinder (521), an inner hexagonal cylindrical head screw (522), a hexagonal nut (523), a Y-shaped joint (524), a pin (525), a cotter pin (526), a spoke connecting lifting lug (527), a fourth hexagonal nut (528) and a spoke pressure sensor (529); the axial loading device (52) is arranged at a through hole (67) of the axial loading device and is fixedly connected with the axial connecting box (64) through bolts, radial load loading is realized through controlling the axial hydraulic cylinder (521), and the axial loading is realized by combining with the spoke pressure sensor (529); the axial hydraulic cylinder (521) is connected with the axial connecting box (64) through an inner hexagonal cylindrical head screw (522), the bottom of the axial hydraulic cylinder (521) is connected with the Y-shaped joint (524), and the axial hydraulic cylinder is fixed through a hexagonal nut (523); one end of a spoke connection lifting lug (527) is connected with a spoke pressure sensor (529) and is fixed through a fourth hexagonal nut (528), and the other end of the spoke connection lifting lug (527) is matched with a Y-shaped joint (524) and is fixed through a pin (525); the cotter pin (526) is inserted into a hole of the pin (525) for preventing looseness; the spoke pressure sensor (529) is connected with the fixed plate (37) through a screw; when the axial load is required to be applied to the test device, the axial hydraulic cylinder (521) drives the spoke pressure sensor (529) to transmit the axial load to the fixed plate (37) and the tested bearing seat (31), and the size of the applied axial load is tested through the spoke pressure sensor (529) so as to realize loading of the axial load; during loading, the assembly simulation module needs to be canceled;
The bearing test box (6) is used for installing parts of various systems and consists of a main shaft system protection box (61), a box seat (62), a tested device protection box (63), an axial connection box (64), a main shaft system observation window (65), a radial loading device through hole (66), an axial loading device through hole (67), a plugging plug (68), an oil discharging plug (69), an oil pipe installation wiring hole (610), a lower side observation window (611), an upper side observation window (612), an oil seal (613) and a plugging plug cap (614); a spindle system observation window (65) is arranged at the top of the spindle system protection box (61) so as to be convenient for observing the running state of the spindle system; the spindle system protective box (61) and the tested device protective box (63) are detachable, so that a tested piece can be conveniently dismounted and a sensor can be conveniently mounted; the tested device protection box (63) is fixedly connected with the box seat (62) through bolts and is used for fixing the bearing radial loading device (51); the axial connecting box (64) is fixedly connected with the tested device protecting box (63) and the box seat (62) through bolts and is used for fixing the bearing axial loading device (52); a sealing plug (68) is arranged at the joint of the axial connecting box (64) and the adjusting screw (44), and an oil seal (613) is arranged at the joint of the sealing plug (68) and the adjusting screw (44) to prevent lubricating oil loss; the two side surfaces of the box seat (62) and the device under test protection box (63) are respectively provided with a lower side observation window (611) and an upper side observation window (612), oil pipe installation wiring holes (610) are distributed on the lower side observation window (611) and the upper side observation window (612), and the oil pipe installation wiring holes (610) are used for oil inlet pipe installation, sensor wiring and adjustment assembly; an oil return hole for lubricating oil return is formed in the bottom of the box seat (62), and an oil discharging plug (69) is arranged on the oil return hole and used for cooling and lubricating the first support bearing (21), the second support bearing (22) and the tested bearing (35); the bottom of the box seat (62) is fixed on the T-shaped table (8) through a T-shaped bolt, and the inner part of the box seat (62) is divided into a box body supporting part and a tested part;
The test system (7) enables the rolling bearing test equipment to be used for testing and researching vibration response characteristics of the outer ring and the retainer under the variable working condition under the bearing rotation condition through installing an acceleration sensor, a thermocouple sensor and an eddy current sensor on the tested bearing device (3); the test system (7) consists of a first acceleration sensor (71), a second acceleration sensor (72), a third acceleration sensor (73), a thermocouple sensor (74) and an eddy current sensor (75); the first acceleration sensor (71) is arranged in the vertical direction of the tested bearing seat (31) and is used for measuring the vibration characteristics of the shell of the tested bearing seat (31); the second acceleration sensor (72) is arranged in a measuring hole of the tested bearing seat (31) and is used for measuring the vibration characteristic of the tested bearing outer ring sleeve (32); the third acceleration sensor (73) is arranged in a measuring hole of the outer ring sleeve (32) of the tested bearing and is used for measuring the vibration characteristic of the outer ring of the tested bearing (35); the thermocouple sensor (74) is arranged in a measuring hole of the outer ring sleeve (32) of the tested bearing and is used for measuring the temperature characteristic of the outer ring of the tested bearing (35); the eddy current sensor (75) is arranged in the measuring hole of the first tested bearing through cover (33), and the measuring end of the eddy current sensor is opposite to the end face of the retainer and is used for measuring the vibration characteristic of the retainer of the tested bearing (35).
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