CN106769042B - Cylindrical roller bearing dual-rotor testing machine - Google Patents

Cylindrical roller bearing dual-rotor testing machine Download PDF

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Publication number
CN106769042B
CN106769042B CN201611217776.4A CN201611217776A CN106769042B CN 106769042 B CN106769042 B CN 106769042B CN 201611217776 A CN201611217776 A CN 201611217776A CN 106769042 B CN106769042 B CN 106769042B
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bearing
test
oil
seat
rotor shaft
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CN106769042A (en
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司东宏
李济顺
于伟涛
薛玉君
马伟
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Henan University of Science and Technology
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Henan University of Science and Technology
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01MTESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M13/00Testing of machine parts
    • G01M13/04Bearings

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  • General Physics & Mathematics (AREA)
  • Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
  • Rolling Contact Bearings (AREA)

Abstract

A cylindrical roller bearing dual-rotor testing machine comprises a machine body seat, a rotor shaft arranged on the machine body seat, a radial loading device and a monitoring device, wherein the radial loading device and the monitoring device are arranged above the rotor shaft and fixedly connected with the machine body seat; the supporting device comprises an axial loading bearing and a supporting bearing which are arranged in parallel, the supporting bearing is positioned on the inner side of the axial loading bearing, and an axial loading device is further arranged on the outer side of the axial loading bearing. The test process is scientific, and various parameters of the large bearing running at high speed can be effectively tested.

Description

Cylindrical roller bearing dual-rotor testing machine
Technical Field
The invention relates to a bearing testing machine, in particular to a cylindrical roller bearing double-rotor testing machine.
Background
The bearing is an important and key basic part in equipment manufacturing, and directly determines the performance, reliability and service life of the equipment; because the working environment of the bearing is severe, the load working condition born by the bearing is complex, the bearing needs to have enough long and even the whole life cycle of the equipment is maintenance-free, and the like, the corresponding simulation working condition verification of the bearing on a testing machine is needed in the design, development, production and manufacturing processes, reliable test data is provided for research, design, manufacture and use, and a basis is provided for the design, manufacture and use of the bearing. The research and development, design, manufacture and test technology of the high-temperature and high-speed precision inter-shaft bearing are mainly monopolized by a few foreign countries, the research and development of the testing machine in China starts in the 7 and 80 years, the inner diameter and the outer diameter of the tested bearing are limited to be medium and small due to the limitation of the design, manufacture and the like at the time, the limit rotating speed is low, and the testing requirements of the existing high-temperature and high-rotating-speed inter-shaft bearing with the inner diameter larger than 110mm and the outer diameter larger than 140mm cannot be met.
Particularly, for a high-temperature high-speed precise inter-shaft cylindrical roller bearing with an inner ring and an outer ring rotating simultaneously in work, because the working environment is severe and the test standard is more strict, a double-rotor testing machine capable of completing the test of the large-size high-speed high-load cylindrical roller bearing is not available in the existing testing equipment.
Disclosure of Invention
In order to solve the defects in the prior art, the invention provides a double-rotor testing machine suitable for a large-scale cylindrical roller bearing between shafts running at high temperature and high speed, wherein double rotors can respectively drive 30000rpm in the same direction or in different directions, the inner diameter of a test bearing is more than or equal to 140mm, the temperature of oil supply under an inner ring reaches 150 ℃, the working temperature reaches 260 ℃, and 60KN is radially loaded.
In order to achieve the purpose, the invention adopts the specific scheme that:
a cylindrical roller bearing dual-rotor testing machine comprises a machine body seat, a rotor shaft arranged on the machine body seat, a radial loading device and a monitoring device, wherein the radial loading device and the monitoring device are arranged above the rotor shaft and fixedly connected with the machine body seat; the supporting device comprises an axial loading bearing and a supporting bearing which are arranged in parallel, the axial loading bearing and the supporting bearing are sleeved on the rotor shaft, the supporting bearing is positioned on the inner side of the axial loading bearing, and the axial loading device is further arranged on the outer side of the axial loading bearing.
The test bearing tool further comprises a fourth stepped sleeve and a test bearing compression ring, wherein the fourth stepped sleeve is sleeved on the lower lubricating sleeve of the ring and matched with a shaft shoulder structure arranged on the outer wall of the lower lubricating sleeve of the ring to limit and fix the inner ring of the test bearing axially, and the test bearing compression ring is fixed on the test end of the outer ring rotor shaft and limits and fixes the outer ring of the test bearing axially.
The first test accompanying device comprises a radial loading bearing sleeved on the inner ring rotor shaft, the outer ring of the radial loading bearing is pressed in an inner hole of a radial loading bearing seat, the radial loading bearing seat is further fixedly connected with a radial loading bearing oil distribution disc, and the radial loading bearing oil distribution disc supplies lubricating oil to the radial loading bearing and axially limits and fixes the outer ring of the radial loading bearing.
The radial loading device comprises an inverted V-shaped oil cylinder support, the bottom ends of two V-shaped branches are fixed on a machine body seat, an inner ring rotor shaft is arranged between the two branches, a radial loading oil cylinder is arranged at the intersection point of the two V-shaped branches and drives a radial loading oil cylinder plunger, a sensor mounting plate is further arranged at the load output end of the radial loading oil cylinder plunger, and a radial load sensor is mounted at the lower part of the sensor mounting plate.
The second test assisting device comprises a test assisting cylindrical roller bearing sleeved on the outer ring rotor shaft, the outer ring of the second test assisting device is pressed in an inner hole of the test assisting cylindrical roller bearing seat and is axially limited and fixed through a test assisting cylindrical roller bearing oil distribution disc, the test assisting cylindrical roller bearing oil distribution disc is fixedly arranged on the test assisting cylindrical roller bearing seat, a second test assisting device gland is further arranged at the upper part of the test assisting cylindrical roller bearing seat, the second test assisting device gland is fixedly connected with the machine body seat, a second test assisting device compression ring I and a second test assisting device compression ring II are fixedly arranged on two sides of the second test assisting device gland respectively, and the test assisting cylindrical roller bearing seat is axially limited and fixed through the two compression rings; the monitoring device comprises a sensor mounting seat arranged on a gland of the second accompanying device, a sensor support is further arranged on the sensor mounting seat, a vibration sensor sleeve is arranged on the sensor support, a vibration sensor is arranged in the vibration sensor sleeve, and a sensing end of the vibration sensor sleeve is close to a testing end of the outer ring rotor shaft.
The cylindrical roller bearing double-rotor testing machine further comprises a testing cabin body, the testing cabin body is fixedly connected with the machine body seat, the inner ring rotor shaft and the outer ring rotor shaft both penetrate through the testing cabin body, and the testing bearing tool is located in the testing cabin in the middle of the testing cabin body; the lower part of the test cabin body is also fixedly provided with an under-ring lubrication oil supply disc for spraying lubricating oil to the under-ring lubrication sleeve; the monitoring device comprises a noise sensor and two temperature sensors which are arranged on the test cabin body, and the two temperature sensors are respectively used for monitoring the temperature of the inner ring and the temperature of the outer ring of the test bearing.
The supporting device further comprises a fixed bearing seat fixedly connected with the outer ring of the supporting bearing and a floating bearing seat fixedly connected with the outer ring of the axial loading bearing, integral glands are further arranged at the upper parts of the fixed bearing seat and the floating bearing seat, the integral glands are fixedly connected with the machine body seat, and a fixed bearing seat pressing ring used for axially limiting the fixed bearing seat is further fixedly connected to one side of the integral glands, which is close to the test bearing tool; a gap is reserved between the fixed bearing seat and the floating bearing seat, a bidirectional oil spraying disc is arranged in the gap, and an oil nozzle of the bidirectional oil spraying disc faces to outer ring raceways of the support bearing and the axial loading bearing respectively; and a pressure-bearing ring is also embedded on one side of the floating bearing seat close to the axial loading device.
The axial loading device comprises a cylinder body and an oil cylinder cover plate which are arranged in parallel, wherein the cylinder body is arranged close to the floating bearing seat, a plurality of through holes and a plurality of blind holes are uniformly and alternately arranged on the cylinder body in an annular shape, the through holes and the blind holes are arranged along the axial direction, the opening holes of the blind holes face the floating bearing seat, a pre-tightening spring is arranged in the blind holes, and an oil cylinder is arranged in the through holes; one side of the oil cylinder cover plate close to the cylinder body is provided with an annular oil duct with a rectangular section, the annular oil duct is communicated with the oil inlet end of the hydraulic oil cylinder, and the oil cylinder cover plate is further provided with an oil supply channel for supplying oil to the annular oil duct along the axis.
A body cover is covered on the body seat, and two end covers are respectively arranged at two ends of the body seat; a pipeline inlet, an oil discharge port and an oil-gas separation outlet are respectively formed in the side part of the machine body base; a plurality of warp-wise reinforcing ribs and weft-wise reinforcing ribs are uniformly arranged on the inner surface of the body cover, and radial loading mechanism through holes are further formed in the top of the body cover.
Has the advantages that:
1. the test for simulating the actual working condition of the large-diameter, high-temperature, high-speed and under-ring lubricating cylindrical roller bearing is realized, and the test for simultaneously carrying out the same-direction same-speed, same-direction different-speed, reverse same-speed or reverse different-speed rotation on the inner ring and the outer ring of the bearing can be realized by adopting a double-rotor structure;
2. the two side support bearings are provided with axial loading devices, the uniformly arranged pre-tightening springs can pre-load the support bearings to a smaller extent, the loading force can be enhanced through the hydraulic oil cylinder along with the increase of the rotating speed, the stable and high-speed operation of the support bearings is ensured, and therefore the highest rotating speed of the testing machine can be improved;
3. the axial follow-up loading adopts a multi-plunger (16 groups) hydraulic cylinder for loading, has high loading precision, good loading smoothness and high corresponding speed, and is suitable for various types
The model test requirements of the model bearing;
4. the inner wall of the under-ring lubricating sleeve for the test bearing is of a stepped structure, and the assembly and disassembly are completed in a hydraulic oil injection mode inside the stepped structure, so that compared with a traditional assembly and disassembly mode based on a thermal expansion and cold contraction principle, when the model of the test bearing is changed, only the hydraulically detachable under-ring lubricating fixing sleeve needs to be replaced; the test bearing has convenient disassembly and assembly and high positioning precision, avoids stress concentration when the test bearing is assembled, and also avoids damage such as scratching of a shaft when the test bearing is disassembled and assembled;
5. by arranging the test bearing cabin cover, the test-accompanying bearing and the test bearing lubricating oil are effectively isolated, and the influence of external lubricating oil on the lubrication detection of the test bearing is avoided;
6. the axial loading floating unit is additionally provided with the linear bearing, so that the positioning precision and the radial rigidity are improved, and the friction resistance is effectively reduced;
7. the axial loading device is also provided with a force sensor which can monitor the loading force in real time to ensure the stable operation of the testing machine;
8. the testing machine adopts a sealing structure, so that the overall stability of the testing machine can be improved, the interference of the external environment is reduced, all waste gas, oil smoke and the like generated in the testing process can be effectively collected and treated, and the pollution to the environment is reduced;
9. the radial loading device is arranged on the base at the lower part of the machine body seat, and the cushion pad is arranged on the radial loading bearing, so that a shock absorption and wear resistance link is added in the loading link, the influence on the acquisition and measurement of loading force signals caused by vibration can be prevented, and the influence on a shafting caused by vibration other than the shafting is also effectively avoided;
10. the radial loading device penetrates through the machine cover, so that the machine cover is not subjected to radial loading force, and the machine cover can be tested and debugged without being installed under the conditions of lower test rotating speed and lower temperature, so that the test flow is simplified, and the test efficiency is improved;
11. the rotating part of the test end adopts non-contact temperature, vibration and noise sensors, the acquired signals are timely, accurate and reliable, and each non-contact sensor is convenient to install and disassemble, and a special air passage is arranged, so that each sensor can be effectively prevented from being polluted, and the normal work under the working environment of 260 ℃ is ensured;
12. the lower oil supply and injection oil channel of the test bearing ring and the lower cover plate of the test bearing cavity are arranged into a whole, and 4 oil inlet channels and 9 nozzle holes are arranged in the lower oil supply and injection oil channel, so that the structure is more compact, the lower oil supply and injection oil channel is convenient to assemble, disassemble and debug, and the oil supply mode can be flexibly adjusted and changed according to different requirements of the test bearing on the lower lubrication and oil supply of the ring;
13. the optimized supporting positions of all bearings in the shafting improve the stress of the test-accompanying bearing and the radial loading bearing while ensuring the effective loading of the test bearing;
14. each bearing is axially limited by a stepped sleeve, the stepped sleeves are arranged on one side of the bearing, which is not subjected to axial load, oil injection ports are formed in the stepped sleeves, the stepped sleeves can be assembled and disassembled in a hydraulic mode, stress concentration is avoided, and a main shaft can be protected from being damaged;
15. the oil injection ports arranged on the step sleeves are arranged at two ends of one diameter, so that the structure and stress stability of the step sleeves during rotation can be ensured, and dynamic balance cannot be influenced by structural asymmetry;
16. the supporting devices of all parts are in transitional connection, and when the accompanying bearing model is changed according to test requirements, only the transitional tool needs to be replaced, so that the test cost is greatly reduced, and the bearing testing requirements of various models can be met within a certain diameter range.
Drawings
FIG. 1 is a schematic view of the overall structure;
FIG. 2 is a schematic structural view of a support device and an axial loading device;
FIG. 3 is a schematic structural diagram of a first test accompanying device, a test bearing fixture and a second test accompanying device;
FIG. 4 is a schematic view of the radial loading device;
FIG. 5 is a schematic view of the outer ring rotor shaft test end configuration;
FIG. 6 is a schematic view of the body mount;
FIG. 7 is a schematic view of the structure of the cover;
fig. 8 is a schematic diagram of the positional relationship of the devices.
Reference numerals: 1. a machine body seat, 101, a pipeline inlet, 102, an oil outlet, 103, an oil-gas separation outlet, 2, an axial loading device, 201, a cylinder body, 202, a cylinder cover plate, 203, an annular oil duct, 204, a hydraulic oil cylinder, 205, a pre-tightening spring, 3, a supporting device, 301, an axial loading bearing, 302, a supporting bearing, 303, a fixed bearing seat, 304, a fixed bearing seat press ring, 305, an integral gland, 306, a floating bearing seat, 307, a linear bearing, 308, a bidirectional oil spraying disc, 309, a pressure bearing ring, 3010, a force sensor, 3011, a first step sleeve, 4, a shaft end, 5, an outer ring rotor shaft, 501, an oil return channel, 6, a machine body end cover, 7, a machine body cover, 8, a second test accompanying device, 801, a test accompanying cylindrical roller bearing, 802, a test accompanying cylindrical roller bearing oil distributing disc, 803, a second test accompanying device II,804, a test accompanying cylindrical roller bearing seat, 805, a second test device gland, 806, a second step sleeve, 807, a second test device pressure ring I,9, a monitoring device, 901, a sensor mounting seat, 902, a sensor support, 903, a vibration sensor, 904, a noise sensor, 10, a radial loading device, 1001, a cylinder support, 1002, a sensor mounting plate, 1003, a load sensor, 1004, a radial loading cylinder, 1005, a radial loading cylinder plunger, 11, a first test device, 1101, a radial loading bearing, 1102, a radial loading bearing seat, 1103, a radial loading bearing oil distribution disc, 1104, a cushion pad, 1105, a third step sleeve, 12, an inner ring rotor shaft, 13, a test bearing tool, 1301, a test bearing, 1302, a fourth step sleeve, 1303, a lubrication sleeve under the ring, 1304, a test bearing pressure ring, 14, a test cabin, 15, and a lubrication oil supply disc under the ring.
Detailed Description
Embodiments of the present invention will be specifically described below with reference to the drawings.
The utility model provides a cylindrical roller bearing birotor testing machine, includes organism seat 1, sets up rotor shaft on organism seat 1, set up in the rotor shaft top and with organism seat 1 fixed connection's radial loading device 10 and monitoring devices 9, the epaxial first device of accompanying and trying on 11, experimental bearing frock 13 and the second of having set gradually of rotor is accompanied and is tried on the device 8, the both ends of rotor shaft still respectively are provided with a supporting arrangement 3.
The rotor shaft is composed of an inner ring rotor shaft 12 and an outer ring rotor shaft 5, and the inner ring rotor shaft 12 and the outer ring rotor shaft 5 are hollow shafts. The test bearing tool 13 is composed of a test bearing 1301, a fourth stepped sleeve 1302, a lower ring lubricating sleeve 1303 and a test bearing pressing ring 1304, wherein the lower ring lubricating sleeve 1303 is sleeved on the test end of the inner ring rotor shaft 12, the test bearing 1301 is sleeved on the lower ring lubricating sleeve 1303, the inner ring of the lower ring lubricating sleeve 1303 is axially limited and fixed with the fourth stepped sleeve 1302 through a shaft shoulder structure arranged on the outer wall of the lower ring lubricating sleeve 1303, and the fourth stepped sleeve 1302 is arranged on one side, close to the outer ring rotor shaft 5, of the test bearing 1301. The outer ring of test bearing 1301 is pressed in the hole of outer lane rotor shaft 5 test end to through the test bearing clamping ring 1304 axial spacing fixed with the 5 test end fixed connection of outer lane rotor shaft, test bearing clamping ring 1304 is located the one side that outer lane rotor shaft 5 was kept away from to test bearing 1301.
The non-test ends of the inner ring rotor shaft 12 and the outer ring rotor shaft 5 are respectively connected with a gearbox through a coupler, the gearbox is connected with a variable frequency motor through a coupler, and according to test requirements, the inner ring rotor shaft 12 and the outer ring rotor shaft 5 can rotate at the same speed, different speeds, the same speed or different speeds in the same direction or in the opposite direction under the driving of the variable frequency motor, and respectively drive the inner ring and the outer ring of the test bearing 1301 to synchronously rotate. Because inner circle rotor shaft 12 and test bearing 1301's inner circle fixed connection, and the outer lane is connected with outer lane rotor shaft 5, consequently outer lane rotor shaft 5's test end internal diameter will be a little bigger, so in the test process from the lubricating oil of test bearing 1301 splash gather on the inner wall of outer lane rotor shaft 5 test end very easily, if can not in time get rid of this part of lubricating oil in time, will cause the local increase of generating heat, if this part of lubricating oil falls into outer lane rotor shaft 5 and inner circle rotor shaft 12's hollow structure, can produce serious influence to inner and outer lane rotor shaft dynamic balance. Therefore, a plurality of oil return channels 501 are formed in the test end of the outer ring rotor shaft 5, the oil return channels 501 penetrate through the outer ring rotor shaft 5 from inside to outside and are obliquely arranged, and lubricating oil falling on the test end of the outer ring rotor shaft 5 is pumped out along the oil return channels 501 under the action of centrifugal force in the test process. Lubricating oil falling on one side, close to the inner ring rotor shaft 12, of the test bearing 1301 is discharged in an accelerated manner under the action of a plurality of spiral grooves formed in the outer wall of the lower ring lubricating sleeve 1303, and friction increase and device damage caused by high-temperature lubricating oil deposition are avoided.
The supporting device 3 includes an axial loading bearing 301 and a supporting bearing 302 arranged in parallel, both the axial loading bearing 301 and the supporting bearing 302 are sleeved on the rotor shaft, and the supporting bearing 302 is located inside the axial loading bearing 301, and both are preferably angular contact bearings. A spacer is also provided between the axial loading bearing 301 and the support bearing 302. Since angular contact bearings need to be pre-tensioned before operation and axial loads need to be applied to the angular contact bearings to obtain rigidity suitable for corresponding rotating speeds as the rotating speeds increase, the axial loading device 2 is further arranged on the outer side of the axial loading bearing 301, the axial loading device 2 outputs the axial loads to act on the axial loading bearing 301, and the axial loads are applied to the supporting bearing 302 through the spacer.
The supporting device 3 further comprises a fixed bearing seat 303 fixedly connected with an outer ring of the supporting bearing 302 and a floating bearing seat 306 fixedly connected with an outer ring of the axial loading bearing 301, an integral gland 305 is further arranged on the upper portions of the fixed bearing seat 303 and the floating bearing seat 306, the integral gland 305 is fixedly connected with the machine body seat 1, and a fixed bearing seat pressing ring 304 used for axially limiting the fixed bearing seat 303 is further fixedly connected to one side, close to the test bearing tooling 13, of the integral gland 305. A gap is reserved between the fixed bearing seat 303 and the floating bearing seat 306, a bidirectional oil spraying disc 308 is arranged in the gap, the bidirectional oil spraying disc 308 is sleeved on the rotor shaft, a plurality of oil paths are axially arranged in the disc body, all the oil paths are uniformly distributed in the circumferential direction, the tail end of each oil path is correspondingly provided with an oil spray nozzle, the oil spray nozzles have two directions and respectively face the axial loading bearing 301 and the supporting bearing 302, and the oil spray nozzles in opposite directions are alternately arranged. The bidirectional oil spray disc 308 obtains lubricating oil from an oil supply channel formed in the fixed bearing base 303, and the lubricating oil sequentially passes through an oil channel and an oil nozzle and then is respectively sprayed to outer ring raceways of the support bearing 302 and the axial loading bearing 301. A pressure-bearing ring 309 is further embedded on one side of the floating bearing seat 306 close to the axial loading device 2, and the pressure-bearing ring 309 is used for bearing the axial load output by the axial loading device 2, transmitting the axial load to the axial loading bearing 301, and further transmitting the axial load to the inner ring of the support bearing 302 through a spacer bush. Under the action of an axial load, the floating bearing seat 306 can move axially to a certain degree, so that a linear bearing 307 is further arranged between the floating bearing seat 306 and the integral gland 305 to improve the positioning accuracy and the radial rigidity, and the friction resistance between the floating bearing seat 306 and the integral gland 305 can be effectively reduced. A number of force sensors 3010 are also provided on the inside of the pressure ring 309 to monitor the axial load experienced by the pressure ring 309. Preferably, the number of the force sensors 3010 is 3, and the axial load value is obtained by adding pressure values measured by the 3 force sensors 3010.
The axial loading device 2 comprises a cylinder body 201 and an oil cylinder cover plate 202 which are arranged in parallel, wherein the cylinder body 201 is arranged close to a floating bearing seat 306, a plurality of through holes and a plurality of blind holes are uniformly and alternately arranged on the cylinder body 201 in an annular shape, the through holes and the blind holes are arranged along the axial direction, open holes of the blind holes face the floating bearing seat 306, pre-tightening springs 205 are arranged in the blind holes, hydraulic oil cylinders 204 are arranged in the through holes, and preferably, the number of the hydraulic oil cylinders 204 and the number of the pre-tightening springs 205 are 16. One side of the oil cylinder cover plate 202 close to the cylinder body 201 is provided with an annular oil duct 203 with a rectangular section, the annular oil duct is communicated with the oil inlet end of the hydraulic oil cylinder 204, and the oil cylinder cover plate 202 is also provided with an oil supply duct for supplying oil to the annular oil duct 203 along the axis. The inside and outside both sides of annular oil duct 203 respectively are provided with an O type sealing washer, and the O type sealing washer inlays to be established on one side that cylinder cover plate 202 is pressed close to cylinder body 201 for prevent that the hydraulic oil in the annular oil duct 203 from taking place to leak.
The first test device 11 includes a radial loading bearing 1101, preferably a cylindrical roller bearing, disposed on the inner ring rotor shaft 12. The outer ring of the radial loading bearing 1101 is pressed in an inner hole of the radial loading bearing seat 1102, the radial loading bearing seat 1102 is further fixedly connected with a radial loading bearing oil distribution disc 1103, and the radial loading bearing oil distribution disc 1103 supplies lubricating oil gas to the radial loading bearing 1101 and axially limits and fixes the outer ring of the radial loading bearing 1101. The inner ring of radial load bearing 1101 is axially fixed in position by a shoulder structure on inner ring rotor shaft 12 and third step sleeve 1105, and third step sleeve 1105 is disposed on the side of radial load bearing 1101 away from the working end of outer ring rotor shaft 5. Because the radial load bearing 1101 is subjected to radial loads during operation, the radial load bearing housing 1102 is not connected to the body mount 1 and is a floating arrangement. In order to reduce the influence of external vibration on a rotor shaft system in the test process, a groove is further formed in the upper portion of the radial loading bearing seat 1102, and a buffer pad 1104 is arranged in the groove.
The radial loading device 10 comprises an inverted V-shaped oil cylinder support 1001, the bottom ends of two branches of the V shape are fixed on the machine body base 1, the inner ring rotor shaft 12 is arranged between the two branches, a radial loading oil cylinder 1004 is arranged on the intersection point of the V shape, the radial loading oil cylinder 1004 drives a radial loading oil cylinder plunger 1005, a sensor mounting plate 1002 is further arranged at the load output end of the radial loading oil cylinder plunger 1005, and a load sensor 1003 is mounted at the lower part of the sensor mounting plate 1002. During the test, the radial load cylinder 1004 drives the radial load cylinder plunger 1005 to move downward and an axial load is applied to the cushion 1104 by the load cell 1003. Through increasing the cushion 1104, the damping and wear-resisting link is added in the radial loading process, the influence of external vibration on a rotor shaft system in the test process of the radial loading bearing seat 1102 is effectively reduced, and the influence on the collection and measurement of a loading force signal caused by vibration can be prevented.
Second accompany examination device 8 establishes the cylindrical roller bearing 801 of accompanying examination on outer lane rotor shaft 5 including establishing, and its outer lane is pressed and is established in the hole of accompanying examination cylindrical roller bearing seat 804 and join in marriage oil pan 802 axial spacing fixed through accompanying examination cylindrical roller bearing, and the inner circle passes through the shaft shoulder and the axial spacing fixed of second step cover 806 that set up on outer lane rotor shaft 5, and second step cover 806 sets up and keeps away from one side of inner circle rotor shaft 12 work end at accompanying examination cylindrical roller bearing 801. Accompany examination cylindrical roller bearing join in marriage that oil pan 802 is fixed to be set up on accompany examination cylindrical roller bearing frame 804, both will accompany examination cylindrical roller bearing 801's outer lane axial spacing, still be used for carrying out oil-gas lubrication to accompany examination cylindrical roller bearing 801. The upper portion of accompanying trying on cylindrical roller bearing frame 804 still is provided with the second and accompanies device gland 805, and the second is accompanied and is tried on device gland 805 and organism seat 1 fixed connection and both sides and fixedly be provided with the second respectively and accompany and try on device clamping ring I807 and second and accompany and try on device clamping ring II803, and two clamping rings all keep fixed connection through the even screw that sets up of a plurality of along the circumferencial direction and second and accompany and try on device gland 805 and organism seat 1 to will accompany trying on cylindrical roller bearing frame 804 axial spacing fixed.
The cylindrical roller bearing double-rotor testing machine further comprises a testing cabin 14, the testing cabin 14 is fixedly connected with the machine body seat 1, the inner ring rotor shaft 12 and the outer ring rotor shaft 5 both penetrate through the testing cabin 14, and the testing bearing tool 13 is located in a testing cabin in the middle of the testing cabin 14; an under-ring lubrication oil supply pan 15 for spraying lubricating oil to the under-ring lubrication sleeve 1303 is also fixedly arranged at the lower part of the test cabin 14. The under-ring lubrication oil supply disc 15 is provided with four oil inlet channels and nine oil nozzles, and the direction of the oil nozzles faces the oil receiving cavity of the under-ring lubrication sleeve 1303. The design of lubricated oil feed dish 15 under the ring of optimization, the structure is compacter, makes things convenient for dismouting and debugging, can adjust the transform oil supply mode in a flexible way according to the different requirements of experimental bearing to lubricated oil supply under the ring moreover.
The monitoring device 9 comprises a sensor mounting seat 901 arranged on a gland 805 of the second test accompanying device, a sensor support 902 is further arranged on the sensor mounting seat 901, a vibration sensor sleeve is arranged on the sensor support 902, a vibration sensor 903 is arranged in the vibration sensor sleeve, and the sensing end of the vibration sensor is close to the testing end of the outer ring rotor shaft 5; the monitoring device 9 further comprises a noise sensor 904 and two temperature sensors arranged on the test cabin 14, wherein the two temperature sensors respectively monitor the temperature of the inner ring and the temperature of the outer ring of the test bearing 1301. The noise sensor 904 and both temperature sensors are disposed in a sensor sleeve that communicates with the interior of the test cabin 14. Wherein the temperature sensor is preferably an infrared temperature sensor, the vibration sensor 903 is preferably an eddy current type vibration sensor, and the noise sensor 904 is preferably a capacitive pickup. In order to prevent the infrared temperature sensor and the noise sensor 904 from being polluted by the lubricating oil splashed out in the test process, the inversion sensitivity is reduced, therefore, an air inlet pipe is communicated with the side wall of the sensor sleeve, gas is continuously blown into the test cabin 14 in the test process, and the lubricating oil is prevented from entering the sensor sleeve by the airflow to pollute the sensor.
A body cover 7 is covered on the body seat 1, and two end covers 6 are respectively arranged at two ends of the body seat 1; a pipeline inlet 101, an oil discharge port 102 and an oil-gas separation outlet 103 are respectively arranged on the side part of the machine body base 1; a plurality of warp-wise reinforcing ribs and weft-wise reinforcing ribs are uniformly arranged on the inner surface of the body cover 7, and radial loading device through holes 701 are further formed in the top of the body cover 7. The radial loading device 10 penetrates through the radial loading device through hole 701 on the cover 7, so that the cover 7 is free from radial loading force, the cover can be tested without being installed under the conditions of lower test rotating speed and temperature, the test flow is simplified, and the test efficiency is improved.
The ladder structures of the first ladder sleeve 3011, the second ladder sleeve 806, the third ladder sleeve 1105 and the fourth ladder sleeve 1302 are all arranged on the inner wall, specifically, an annular groove with a rectangular cross section is dug in the middle of the inner wall, so that a ladder structure is formed. And each step sleeve is provided with an oil filling channel, the oil filling channels are arranged on the side walls of the step sleeves and are perpendicular to the axis of the step sleeves and communicated with the step structures of the inner walls of the step sleeves, the side walls of the step sleeves are also provided with a balance hole, the balance hole is the same as the oil filling channel in structure and is symmetrical about the axis of the step sleeves, but the balance hole is not communicated with the step structures of the inner walls of the step sleeves. Through setting up the balancing hole, can guarantee that ladder cover structure and atress when rotatory are stable, can not cause the damage because of the structure is inhomogeneous.
Through optimal design and experiments, the position relation of each part of the device is as follows: in the horizontal direction, if the non-test end of the inner ring rotor shaft 12 is point a, the support bearing 302 on the inner ring rotor shaft 12 is point a, the radial load bearing 1101 is point B, the test bearing 1301 is point F, the trial cylindrical roller bearing 801 is point C, the support bearing 302 on the outer ring rotor shaft 5 is point D, and the non-test end of the outer ring rotor shaft 5 is point a ', the positional relationships of the points are BF = CF, AB = CD, aF = Da ', BF/AB = CF/CD =5.25, AB/aA = CD/Da ' =2.47. The supporting positions of all bearings in the optimized shafting ensure effective loading of the test bearings, and improve the stress of the auxiliary test cylindrical roller bearing and the radial loading bearing. The service life of the testing machine is prolonged, and the reliability and the stability of the testing machine are improved.
The working process of the axial loading device 2 is as follows: according to the requirement of the support bearing 302 on pretightening force, a proper pretightening spring 205 is selected, and after the testing machine is installed, the pretightening spring 205 always applies axial pretightening force to the pressure-bearing ring 309; after the test is started, the axial load required by the support bearing 302 is gradually increased along with the increase of the rotating speed, and at the moment, the load is output to the pressure bearing ring 309 through the hydraulic oil cylinder 204 so as to meet the requirement of the support bearing 302 on the axial load; in the test process, the force sensor 3010 monitors the axial load borne by the pressure-bearing ring 309 in real time, the monitored load capacity is converted into a digital signal through the signal transmitter, the digital signal is fed back and transmitted to the oil pressure control device, and the oil pressure control device adjusts the oil pressure transmitted to the hydraulic oil cylinder 204 in real time according to the digital signal, so that the axial load capacity is adjusted. By adopting a combined loading mode of spring pre-tightening loading and hydraulic follow-up loading, the requirement of the supporting bearing 302 on pre-tightening force can be met, the axial load can be continuously adjusted, and the device is suitable for different test requirements. Compared with single spring loading, the loading mode has the advantages that the controllability degree of the loading force is high, the load output is uniform, and the change is smooth. Compared with single hydraulic loading, the loading mode can solve the problem of dead space of the hydraulic loading system, and can also keep each device from being damaged by means of spring loading in the case of failure of the hydraulic system.
The working process of the radial loading device 10 is as follows: after the test is started, the radial loading cylinder 1004 drives the radial loading cylinder plunger 1005 to move downwards to apply a radial load, the radial load is acted on the cushion pad 1104 above the radial loading bearing seat 1102 and then is transmitted to the radial loading bearing 1101 through the radial loading bearing seat 1102, the radial loading bearing 1101 transmits the radial load to the inner ring rotor shaft 12 and further to the test bearing 1301, and the application of the radial load is completed. The radial loading cylinder 1104 is also connected with an automatic control device, the load capacity of the radial load is continuously adjusted along with the change of the test working condition, the adjusting process is similar to the adjusting process of the axial load, and the description is omitted.
The fixing mode of the whole machine is as follows: the machine body base 1 is horizontally fixed on a foundation through foundation bolts, the machine cover 10 is fixed on the machine body base 1 through 18M 8-35 bolts and gaskets on each side, and an O-shaped sealing ring is arranged on the machine body base 1 at the joint of the machine cover 10 and the machine body base 1 through digging a groove; two ends of the machine base are respectively provided with a machine base end cover 9, each machine base end cover 9 fixes the machine base end cover 9 on the machine body base 1 and the machine cover 10 through 18M 10-30 bolts and gaskets, and O-shaped sealing rings are arranged in grooves of the machine base end covers 9.
Through tests, the inner ring rotor shaft 12 and the outer ring rotor shaft 5 can respectively drive 30000rpm in the same direction or in different directions, the inner diameter of the test bearing 1301 can be larger than or equal to 140mm, the lower oil supply temperature of the inner ring can reach 150 ℃, the working temperature can reach 260 ℃, and the radial load can reach 60KN.

Claims (9)

1. The utility model provides a cylindrical roller bearing birotor testing machine, includes organism seat (1), the rotor shaft of setting on organism seat (1), set up in the rotor shaft top and with organism seat (1) fixed connection's radial loading device (10) and monitoring devices (9), the rotor shaft has set gradually first accompanying and has tested device (11), experimental bearing frock (13) and second accompanying and have tested device (8), the both ends of rotor shaft still respectively are provided with a supporting device (3), its characterized in that:
the rotor shaft consists of an inner ring rotor shaft (12) and an outer ring rotor shaft (5), a lower ring lubricating sleeve (1303) of the test bearing tool (13) is sleeved at the test end of the inner ring rotor shaft (12), a test bearing (1301) is sleeved on the lower ring lubricating sleeve (1303), and the outer ring of the test bearing (1301) is pressed in an inner hole of the test end of the outer ring rotor shaft (5);
the supporting device (3) comprises an axial loading bearing (301) and a supporting bearing (302) which are arranged in parallel, the axial loading bearing (301) and the supporting bearing (302) are sleeved on the rotor shaft, the supporting bearing (302) is located on the inner side of the axial loading bearing (301), and an axial loading device (2) is further arranged on the outer side of the axial loading bearing (301).
2. The cylindrical roller bearing dual-rotor testing machine according to claim 1, wherein: test bearing frock (13) still include fourth ladder cover (1302) and test bearing clamping ring (1304), wherein fourth ladder cover (1302) cover is established on lubricated cover (1303) under the ring to with the bearing shoulder structure cooperation that sets up under the ring on lubricated cover (1303) outer wall with test bearing (1301) the inner circle axial spacing fixed, test bearing clamping ring (1304) are fixed and are held on the test of outer lane rotor shaft (5) and will test bearing (1301) the outer lane axial spacing fixed.
3. The cylindrical roller bearing dual-rotor testing machine according to claim 1, wherein: the first test accompanying device (11) comprises a radial loading bearing (1101) sleeved on an inner ring rotor shaft (12), the outer ring of the radial loading bearing (1101) is pressed in the inner hole of a radial loading bearing seat (1102), the radial loading bearing seat (1102) is further fixedly connected with a radial loading bearing oil distribution plate (1103), and the radial loading bearing oil distribution plate (1103) supplies lubricating oil to the radial loading bearing (1101) and limits and fixes the axial direction of the outer ring of the radial loading bearing (1101).
4. The cylindrical roller bearing dual-rotor testing machine of claim 3, wherein: the radial loading device (10) comprises an inverted V-shaped oil cylinder support (1001), the bottom ends of two V-shaped branches are fixed on a machine body seat (1), an inner ring rotor shaft (12) is arranged between the two branches, a radial loading oil cylinder (1004) is arranged at the intersection point of the two V-shaped branches, the radial loading oil cylinder (1004) drives a radial loading oil cylinder plunger (1005), a sensor mounting plate (1002) is further arranged at the load output end of the radial loading oil cylinder plunger (1005), and a radial load sensor (1003) is mounted at the lower part of the sensor mounting plate (1002).
5. The cylindrical roller bearing dual-rotor testing machine according to claim 1, wherein: the second test assisting device (8) comprises a test assisting cylindrical roller bearing (801) sleeved on the outer ring rotor shaft (5), the outer ring of the test assisting cylindrical roller bearing is pressed in an inner hole of a test assisting cylindrical roller bearing seat (804) and is axially limited and fixed through a test assisting cylindrical roller bearing oil distribution disc (802), the test assisting cylindrical roller bearing oil distribution disc (802) is fixedly arranged on the test assisting cylindrical roller bearing seat (804), a second test assisting device pressing cover (805) is further arranged on the upper portion of the test assisting cylindrical roller bearing seat (804), the second test assisting device pressing cover (805) is fixedly connected with the machine body seat (1), a second test assisting device pressing ring I (807) and a second test assisting device pressing ring II (803) are fixedly arranged on two sides of the second test assisting cylindrical roller bearing seat (804), and the test assisting cylindrical roller bearing seat (804) is axially limited and fixed through the two pressing rings; the monitoring device (9) comprises a sensor mounting seat (901) arranged on a gland (805) of the second accompanying device, a sensor support (902) is further arranged on the sensor mounting seat (901), a vibration sensor sleeve is arranged on the sensor support (902), a vibration sensor (903) is arranged in the vibration sensor sleeve, and the sensing end of the vibration sensor sleeve is close to the testing end of the outer ring rotor shaft (5).
6. The cylindrical roller bearing dual-rotor testing machine of claim 1, wherein: the cylindrical roller bearing double-rotor testing machine further comprises a testing cabin body (14), the testing cabin body (14) is fixedly connected with the machine body seat (1), the inner ring rotor shaft (12) and the outer ring rotor shaft (5) penetrate through the testing cabin body (14), and the testing bearing tool (13) is located in the testing cabin in the middle of the testing cabin body (14); the lower part of the test cabin body (14) is also fixedly provided with an under-ring lubrication oil supply disc (15) for spraying lubricating oil to the under-ring lubrication sleeve (1303); the monitoring device (9) comprises a noise sensor (904) and two temperature sensors which are arranged on the test cabin body (14), wherein the two temperature sensors are used for monitoring the temperature of the inner ring and the temperature of the outer ring of the test bearing (1301) respectively.
7. The cylindrical roller bearing dual-rotor testing machine of claim 1, wherein: the supporting device (3) further comprises a fixed bearing seat (303) fixedly connected with the outer ring of the supporting bearing (302) and a floating bearing seat (306) fixedly connected with the outer ring of the axial loading bearing (301), an integral gland (305) is further arranged on the upper portions of the fixed bearing seat (303) and the floating bearing seat (306), the integral gland (305) is fixedly connected with the machine body seat (1), and a fixed bearing seat pressing ring (304) used for axially limiting the fixed bearing seat (303) is further fixedly connected to one side, close to the test bearing tool (13), of the integral gland (305); a gap is reserved between the fixed bearing seat (303) and the floating bearing seat (306), a bidirectional oil spraying disc (308) is arranged in the gap, and an oil nozzle of the bidirectional oil spraying disc (308) faces to outer ring raceways of the supporting bearing (302) and the axial loading bearing (301) respectively; and a pressure-bearing ring (309) is also embedded on one side of the floating bearing seat (306) close to the axial loading device (2).
8. The cylindrical roller bearing dual-rotor testing machine according to claim 7, wherein: the axial loading device (2) comprises a cylinder body (201) and an oil cylinder cover plate (202) which are arranged in parallel, wherein the cylinder body (201) is arranged close to a floating bearing seat (306), a plurality of through holes and a plurality of blind holes are uniformly and alternately arranged on the cylinder body (201) in an annular shape, the through holes and the blind holes are arranged along the axial direction, the open holes of the blind holes face the floating bearing seat (306), a pre-tightening spring (205) is arranged in the blind holes, and a hydraulic oil cylinder (204) is arranged in the through holes; one side of the oil cylinder cover plate (202) close to the cylinder body (201) is provided with an annular oil duct (203) with a rectangular section, the annular oil duct is communicated with an oil inlet end of the hydraulic oil cylinder (204), and the oil cylinder cover plate (202) is further provided with an oil supply duct for supplying oil to the annular oil duct (203) along the axis.
9. The cylindrical roller bearing dual-rotor testing machine of claim 1, wherein: a body cover (7) is covered on the body base (1), and two end covers (6) are respectively arranged at two ends of the body base (1); a pipeline inlet (101), an oil discharge port (102) and an oil-gas separation outlet (103) are respectively formed in the side part of the machine body base (1); a plurality of warp-wise reinforcing ribs and weft-wise reinforcing ribs are uniformly arranged on the inner surface of the machine body cover (7), and radial loading mechanism through holes are further formed in the top of the machine body cover (7).
CN201611217776.4A 2016-12-26 2016-12-26 Cylindrical roller bearing dual-rotor testing machine Active CN106769042B (en)

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