CN106769042A - A kind of cylinder roller bearing birotor testing machine - Google Patents

Abstract

A cylindrical roller bearing double-rotor testing machine, comprising a body seat, a rotor shaft arranged on the body seat, a radial loading device and a monitoring device arranged above the rotor shaft and fixedly connected with the body seat, and the rotor shaft is sequentially provided with The first accompanying device, the test bearing tooling and the second accompanying device, a supporting device is provided at both ends of the rotor shaft, the rotor shaft is composed of an inner ring rotor shaft and an outer ring rotor shaft, and the test bearing tooling The under-ring lubricating sleeve is sleeved on the test end of the inner ring rotor shaft, and the test bearing is sleeved on the under-ring lubricating sleeve. The outer ring of the test bearing is pressed into the inner hole of the outer ring rotor shaft test end; the supporting device includes parallel An axial loading bearing and a support bearing are provided, and the support bearing is located inside the axial loading bearing, and an axial loading device is also provided outside the axial loading bearing. The invention has a scientific test process and can effectively test various parameters of large bearings running at high speed.

Description

A Cylindrical Roller Bearing Double 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 technique

Bearing is an important and key basic component in equipment manufacturing, which directly determines the performance, reliability and life of the equipment; due to the harsh working environment and complex load conditions of the bearing, it must be long enough or even the entire life cycle of the equipment to avoid Maintenance, etc. During the design, development and manufacturing process, the bearings must be verified on the testing machine for corresponding simulated working conditions to provide reliable test data for research, design, manufacture and use, and provide a basis for the design, manufacture and use of bearings . The R&D, design, manufacture and test technology of high-temperature and high-speed precision inter-axial bearings are mainly monopolized by a few foreign countries. The research and development of this type of testing machine in my country began in the 1970s and 1980s. Due to the limitations of design and manufacturing at that time, The inner and outer diameters of the test bearings are also limited to medium and small sizes, and the limit speed is also low, which cannot meet the current test requirements for inter-shaft bearings with an inner diameter greater than 110mm and an outer diameter greater than 140mm at high temperature and high speed.

Especially for high-temperature, high-speed precision inter-axial cylindrical roller bearings in which the inner and outer rings rotate at the same time, because of the harsh working environment and stricter test standards, there is no existing test equipment that can complete large-size, high-speed bearings. , Double-rotor testing machine for large-load cylindrical roller bearing tests.

Contents of the invention

In order to solve the deficiencies in the prior art, the present invention provides a double-rotor testing machine suitable for high-temperature and high-speed operation of large-scale interaxial cylindrical roller bearings. The double-rotors can drive 30,000 rpm in the same direction or in different directions, respectively, and test the inner diameter of the bearing. Greater than or equal to 140mm, the oil supply temperature under the inner ring reaches 150°C, the working temperature reaches 260°C, and the radial load is 60KN.

In order to achieve the above object, the specific scheme adopted by the present invention is:

A cylindrical roller bearing double-rotor testing machine, comprising a body seat, a rotor shaft arranged on the body seat, a radial loading device and a monitoring device arranged above the rotor shaft and fixedly connected with the body seat, and the rotor shaft is sequentially provided with The first accompanying device, the test bearing tooling and the second accompanying device, each of the two ends of the rotor shaft is provided with a supporting device, the rotor shaft is composed of an inner ring rotor shaft and an outer ring rotor shaft, and the test bearing tooling The under-ring lubricating sleeve is sleeved on the test end of the inner ring rotor shaft, and the test bearing is sleeved on the under-ring lubricating sleeve. The outer ring of the test bearing is pressed into the inner hole of the outer ring rotor shaft test end; the supporting device includes parallel The axially loaded bearing and the supporting bearing are provided, and both the axially loading bearing and the supporting bearing are sleeved on the rotor shaft, and the supporting bearing is located inside the axially loading bearing, and an axially loading device is also arranged outside the axially loading bearing.

The test bearing tooling also includes a fourth stepped sleeve and a test bearing pressure ring, wherein the fourth stepped sleeve is sleeved on the lubricating sleeve under the ring, and cooperates with the shoulder structure provided on the outer wall of the lubricating sleeve under the ring to seal the inner ring of the test bearing The axial limit is fixed, the test bearing pressure ring is fixed on the test end of the rotor shaft of the outer ring and the outer ring of the test bearing is axially limited and fixed.

The first accompanying test device includes a radially loaded bearing sleeved on the rotor shaft of the inner ring, the outer ring of the radially loaded bearing is pressed into the inner hole of the radially loaded bearing seat, and the radially loaded bearing seat is also fixedly connected There is a radially loaded bearing oil distribution plate, which provides lubricating oil to the radially loaded bearing and fixes the axial limit of the outer ring of the radially loaded bearing.

The radial loading device includes an inverted "V"-shaped oil cylinder bracket. The bottom ends of the two branches of the "V" shape are fixed on the body seat and the inner ring rotor shaft is arranged between the two branches. In the "V" shape A radial loading cylinder is arranged at the intersection of the two branches, and the radial loading cylinder drives the plunger of the radial loading cylinder. A sensor mounting plate is also provided at the load output end of the radial loading cylinder plunger, and a sensor mounting plate is installed on the lower part of the sensor mounting plate. Radial load cell.

The second accompanying device includes an accompanying cylindrical roller bearing sleeved on the rotor shaft of the outer ring, the outer ring of which is pressed into the inner hole of the accompanying cylindrical roller bearing seat and oil is distributed through the accompanying cylindrical roller bearing The axial limit of the plate is fixed, and the oil distribution plate of the accompanying test cylindrical roller bearing is fixedly arranged on the accompanying test cylindrical roller bearing seat. A second accompanying test device gland is also arranged on the upper part of the accompanying test cylindrical roller bearing seat. The gland of the second accompanying test device is fixedly connected with the body seat, and the second accompanying test device pressing ring I and the second accompanying testing device pressing ring II are respectively fixed on both sides. The limit is fixed; the monitoring device includes a sensor mounting seat arranged on the gland of the second accompanying test device, the sensor mounting seat is also provided with a sensor bracket, the sensor bracket is provided with a vibration sensor sleeve, and the vibration sensor sleeve is A vibration sensor is provided, and its sensing end is close to the test end of the rotor shaft of the outer ring.

The cylindrical roller bearing double-rotor testing machine also includes a test cabin, the test cabin is fixedly connected with the body seat, the inner ring rotor shaft and the outer ring rotor shaft pass through the test cabin, and the test bearing tooling is located at In the test cabin in the middle of the test cabin; the lower part of the test cabin is also fixedly provided with a ring lubricating oil supply plate for spraying lubricating oil to the ring lubricating sleeve; the monitoring device includes a noise sensor arranged on the test cabin And two temperature sensors, the two temperature sensors monitor the temperature of the test bearing inner ring and outer ring respectively.

The support device also includes a fixed bearing seat fixedly connected to the outer ring of the supporting bearing and a floating bearing seat fixedly connected to the outer ring of the axially loaded bearing. An integral gland is also arranged on the upper part of the fixed bearing seat and the floating bearing seat. The gland is fixedly connected with the body seat, and the fixed bearing seat pressure ring for axially limiting the fixed bearing seat is fixedly connected on the side of the integral gland close to the test bearing tooling; the fixed bearing seat and the floating bearing seat There is a gap between them, and a two-way oil injection plate is arranged in the gap, and the oil injection nozzles of the two-way oil injection plate face the outer ring raceways of the support bearing and the axially loaded bearing respectively; the floating bearing seat is close to one side of the axially loaded device A pressure ring is also embedded on the side.

The axial loading device includes a cylinder block and an oil cylinder cover arranged side by side, wherein the cylinder body is arranged close to the floating bearing seat, and several through holes and several blind holes are evenly and alternately opened on the cylinder body in a ring shape. The blind holes are arranged along the axial direction and the opening of the blind holes faces the floating bearing seat. A pre-tightening spring is arranged in the blind holes, and a hydraulic cylinder is arranged in the through hole; An annular oil channel with a rectangular cross-section communicates with the oil inlet end of the hydraulic oil cylinder, and an oil supply channel for supplying oil to the annular oil channel is provided along the axis on the oil cylinder cover plate.

The body seat is also covered with a body cover, and a body end cover is respectively arranged at both ends of the body seat; a pipeline inlet, an oil discharge port and an oil-gas separation outlet are respectively opened on the side of the body seat; A number of warp and latitudinal reinforcing ribs are evenly arranged on the surface, and a radial loading mechanism hole is opened on the top of the body cover.

Beneficial effect:

1. Realized the simulated actual working condition test of large-diameter, high-temperature, high-speed, under-ring lubricated cylindrical roller bearings, and adopted a double-rotor structure, which can realize the same direction and same speed, the same direction and different speed, and reverse rotation for the inner and outer rings of the bearing at the same time. Tests of rotating at the same speed or at different speeds in the opposite direction;

2. The supporting bearings on both sides are equipped with axial loading devices. The evenly arranged pre-tightening springs can do a small preload on the supporting bearings. As the speed increases, the loading force can be enhanced through the hydraulic cylinder to ensure the stability of the supporting bearings. , High-speed operation, so that the maximum speed of the testing machine can be increased;

3. Axial follow-up loading adopts multi-plunger (16 groups) hydraulic cylinders for loading, which has high loading accuracy, good loading smoothness, fast response speed, and is suitable for various types.

No. bearing type test requirements;

4. The inner wall of the lubricating sleeve under the ring used for the test bearing adopts a stepped structure, and the disassembly and assembly are completed by hydraulically filling the inside of the stepped structure. Compared with the traditional method of disassembly and assembly using the principle of thermal expansion and contraction, the test bearing For different models, only the hydraulic detachable lubricating fixed sleeve under the ring needs to be replaced; it is not only easy to disassemble and install, but also has high positioning accuracy, which avoids stress concentration when installing the test bearing, and also avoids the impact on the shaft when the test bearing is disassembled. damage such as scratches;

5. By setting the test bearing hatch, the effective isolation of the accompanying test bearing and the test bearing lubricating oil is realized, and the influence of the external lubricating oil on the test bearing lubrication detection is avoided;

6. The axially loaded floating unit is equipped with a linear bearing, which improves the positioning accuracy and radial stiffness, and effectively reduces the frictional resistance;

7. The axial loading device is also equipped with a force sensor, which can monitor the loading force in real time and ensure the stable operation of the testing machine;

8. The testing machine adopts a sealed structure, which can not only improve the overall stability of the testing machine and reduce the interference of the external environment, but also can effectively collect and treat all the exhaust gas and oil fume generated during the test process to reduce environmental pollution;

9. The radial loading device is installed on the base of the lower part of the machine body, and a buffer pad is provided on the radial loading bearing, which adds a shock-absorbing and wear-resistant link to the loading link, which can prevent the collection of the loading force signal due to vibration, The measurement has an impact, and it also effectively avoids the impact of vibration outside the shaft system on the shaft system;

10. The radial loading device passes through the cover, so that the cover is not subjected to radial loading force. In the case of low test speed and temperature, the test and debugging can be carried out without installing the cover, which simplifies the test process and improves the test efficiency. ;

11. The rotating parts of the test end adopt non-contact temperature, vibration and noise sensors, and the signal collection is timely, accurate and reliable, and each non-contact sensor is not only easy to install and disassemble, but also has a special airway, which can effectively prevent the pollution of each sensor , to ensure that it can work normally under the working environment of 260°C;

12. The oil supply and injection oil channel under the test bearing ring is integrated with the lower cover plate of the test bearing chamber. There are 4 oil inlet channels and 9 nozzle holes inside, which not only makes the structure more compact, easy to disassemble and debug, but also The oil supply mode can be flexibly adjusted and changed according to the different requirements of the test bearing for the lubrication oil supply under the ring;

13. The optimized support position of each bearing in the shaft system improves the stress of the accompanying test bearing and radially loaded bearing while ensuring the effective loading of the test bearing;

14. Each bearing adopts a stepped sleeve for axial limit, and the stepped sleeve is set on the side where the bearing is not subject to axial load. There is also an oil injection port on the stepped sleeve, which can be disassembled by hydraulic pressure. installed to avoid stress concentration and protect the spindle from damage;

15. The oil filling port on the stepped sleeve is set at both ends of a diameter, which can not only ensure the structure and stress stability of the stepped sleeve during rotation, but also not affect the dynamic balance due to structural asymmetry;

16. The supporting device of each component adopts transition connection. When changing the type of test bearing according to the test needs, only the transition tooling needs to be replaced, which not only greatly reduces the test cost, but also can adapt to the needs of various types of bearing tests within a certain diameter range. .

Description of drawings

Fig. 1 is a schematic diagram of the overall structure;

Fig. 2 is a structural schematic view of the supporting device and the axial loading device;

Fig. 3 is a structural schematic diagram of the first accompanying test device, the test bearing tooling and the second accompanying test device;

Fig. 4 is a structural schematic diagram of a radial loading device;

Figure 5 is a schematic diagram of the structure of the test end of the outer ring rotor shaft;

Fig. 6 is a schematic diagram of the structure of the body seat;

Fig. 7 is a schematic diagram of the structure of the machine cover;

Fig. 8 is a schematic diagram of the positional relationship of various parts of the device.

Reference signs: 1, machine body seat, 101, pipeline inlet, 102, oil discharge port, 103, oil-gas separation outlet, 2, axial loading device, 201, cylinder block, 202, oil cylinder cover plate, 203, annular oil passage, 204, hydraulic cylinder, 205, preload spring, 3, supporting device, 301, axially loaded bearing, 302, supporting bearing, 303, fixed bearing seat, 304, fixed bearing seat pressing ring, 305, integral gland, 306, Floating bearing seat, 307, linear bearing, 308, two-way oil injection plate, 309, pressure ring, 3010, force sensor, 3011, first step sleeve, 4, shaft end sealing disc, 5, outer ring rotor shaft, 501, Oil return passage, 6. Airframe end cover, 7. Airframe cover, 8. Second accompanying test device, 801. Accompanying cylindrical roller bearing, 802. Accompanying cylindrical roller bearing oil distribution plate, 803. Second accompanying test Device pressure ring II, 804, test cylindrical roller bearing seat, 805, second test device gland, 806, second step sleeve, 807, second test device pressure ring I, 9, monitoring device, 901, Sensor mounting seat, 902, sensor bracket, 903, vibration sensor, 904, noise sensor, 10, radial loading device, 1001, oil cylinder bracket, 1002, sensor mounting plate, 1003, load sensor, 1004, radial loading oil cylinder, 1005 , Radial loading cylinder plunger, 11, the first accompanying test device, 1101, radial loading bearing, 1102, radial loading bearing housing, 1103, radial loading bearing oil distribution plate, 1104, buffer pad, 1105, the third Step sleeve, 12, inner ring rotor shaft, 13, test bearing tooling, 1301, test bearing, 1302, fourth step sleeve, 1303, lubricating sleeve under the ring, 1304, test bearing pressure ring, 14, test cabin body, 15, Lubricate the oil supply pan under the ring.

detailed description

Embodiments of the present invention will be specifically described below with reference to the accompanying drawings.

A cylindrical roller bearing double-rotor testing machine, comprising a body base 1, a rotor shaft arranged on the body base 1, a radial loading device 10 arranged above the rotor shaft and fixedly connected to the body base 1, and a monitoring device 9, the rotor A first accompanying test device 11 , a test bearing tooling 13 and a second accompanying test device 8 are sequentially arranged on the shaft, and a supporting device 3 is respectively provided at both ends of the rotor shaft.

The rotor shaft is composed of an inner ring rotor shaft 12 and an outer ring rotor shaft 5, and both the inner ring rotor shaft 12 and the outer ring rotor shaft 5 are hollow shafts. The test bearing tooling 13 is composed of a test bearing 1301, a fourth stepped sleeve 1302, an under-ring lubricating sleeve 1303 and a test bearing pressure ring 1304, wherein the under-ring lubricating sleeve 1303 is set on the test end of the inner ring rotor shaft 12, and the test The bearing 1301 is set on the lubricating sleeve under the ring 1303, and its inner ring is fixed by the shoulder structure on the outer wall of the lubricating sleeve 1303 and the axial limit of the fourth stepped sleeve 1302, and the fourth stepped sleeve 1302 is set on the test bearing 1301 is close to the side of the outer ring rotor shaft 5 . The outer ring of the test bearing 1301 is pressed in the inner hole of the test end of the outer ring rotor shaft 5, and is fixed in an axial position by the test bearing pressure ring 1304 fixedly connected with the test end of the outer ring rotor shaft 5, and the test bearing pressure ring 1304 is located on the test end. The bearing 1301 is away from the side of the outer ring rotor shaft 5 .

The non-test ends of the inner ring rotor shaft 12 and the outer ring rotor shaft 5 are respectively connected to the gearbox through a coupling, and the gearbox is connected to the variable frequency motor through a shaft coupling. According to the test requirements, the inner ring rotor shaft 12 and the outer ring The ring rotor shaft 5 can be rotated in the same direction at the same speed, in the same direction at different speeds, in the opposite direction at the same speed or at different speeds in the opposite direction under the drive of the frequency conversion motor, and drives the inner ring and the outer ring of the test bearing 1301 to rotate synchronously. Because the inner ring rotor shaft 12 is fixedly connected to the inner ring of the test bearing 1301, and the outer ring is connected to the outer ring rotor shaft 5, the inner diameter of the test end of the outer ring rotor shaft 5 is larger, so that the test bearing 1301 The splashed lubricating oil is easy to accumulate on the inner wall of the test end of the outer ring rotor shaft 5. If this part of the lubricating oil cannot be removed in time, local heating will increase. If this part of the lubricating oil falls into the outer ring rotor shaft 5 and The hollow structure of the inner ring rotor shaft 12 will seriously affect the dynamic balance of the inner and outer ring rotor shafts. Therefore, several oil return passages 501 are opened on the test end of the outer ring rotor shaft 5, and the oil return passages 501 run through the outer ring rotor shaft 5 from the inside to the outside and are arranged obliquely. During the test, they fall on the test end of the outer ring rotor shaft 5. The lubricating oil is pumped out along the oil return passage 501 under the action of centrifugal force. The lubricating oil falling on the side of the test bearing 1301 close to the rotor shaft 12 of the inner ring is accelerated and discharged under the action of multiple spiral grooves provided on the outer wall of the lubricating sleeve 1303 under the ring, which avoids the increase of friction caused by the deposition of high-temperature lubricating oil and damage to the device .

The support device 3 includes an axially loaded bearing 301 and a supporting bearing 302 arranged side by side. The axially loading bearing 301 and the supporting bearing 302 are both sleeved on the rotor shaft and the supporting bearing 302 is located inside the axially loading bearing 301. Both are preferably For angular contact bearings. A spacer is also provided between the axially loaded bearing 301 and the support bearing 302 . Because angular contact bearings need to be preloaded before running, and as the speed increases, an axial load needs to be applied to it to obtain the stiffness suitable for the corresponding speed, so the outer side of the axially loaded bearing 301 is also provided with an axially loaded Device 2, the axial load device 2 outputs an axial load to act on the axial load bearing 301, and applies the axial load to the support bearing 302 through the spacer.

The support device 3 also includes a fixed bearing seat 303 fixedly connected to the outer ring of the support bearing 302 and a floating bearing seat 306 fixedly connected to the outer ring of the axially loaded bearing 301, and the upper parts of the fixed bearing seat 303 and the floating bearing seat 306 are also An integral gland 305 is provided, and the integral gland 305 is fixedly connected with the body seat 1. On the side of the integral gland 305 close to the test bearing tooling 13, a fixed bearing seat for axially limiting the fixed bearing seat 303 is also fixedly connected. Pressure ring 304 . There is a gap between the fixed bearing seat 303 and the floating bearing seat 306, and a two-way oil spray plate 308 is arranged in the gap, and the two-way oil spray plate 308 is sleeved on the rotor shaft. Oil passages, all oil passages are evenly distributed in the circumferential direction, each end of the oil passage corresponds to an oil nozzle, the oil nozzle has two directions, respectively facing the axial loading bearing 301 and the supporting bearing 302, and the directions are opposite The fuel injectors are arranged alternately with each other. The two-way oil injection plate 308 obtains lubricating oil from the oil supply channel provided on the fixed bearing seat 303, and sprays oil to the outer ring raceways of the support bearing 302 and the axially loaded bearing 301 after passing through the oil channel and the oil spray nozzle in sequence. The side of the floating bearing seat 306 close to the axial loading device 2 is also embedded with a pressure bearing ring 309, which is used to bear the axial load output by the axial loading device 2 and transmit it to the axial loading bearing 301, and then transmitted to the inner ring of the support bearing 302 through the spacer. Under the action of axial load, the floating bearing seat 306 will move axially to a certain extent, so a linear bearing 307 is also provided between the floating bearing seat 306 and the integral gland 305 to improve positioning accuracy and radial rigidity, And it can effectively reduce the frictional resistance between the floating bearing seat 306 and the integral gland 305 . Several force sensors 3010 are also arranged inside the bearing ring 309 for monitoring the axial load borne by the bearing ring 309 . Preferably, there are preferably three force sensors 3010, and the axial load value is obtained by adding the pressure values measured by the three force sensors 3010.

The axial loading device 2 includes a cylinder block 201 and an oil cylinder cover plate 202 arranged side by side, wherein the cylinder block 201 is arranged close to the floating bearing seat 306, and several through holes and several The blind hole, the through hole and the blind hole are all arranged axially and the opening of the blind hole faces the floating bearing seat 306. A preload spring 205 is arranged in the blind hole, and a hydraulic cylinder 204 is arranged in the through hole. As a preference, the There are 16 hydraulic cylinders 204 and preload springs 205. The side of the oil cylinder cover 202 close to the cylinder body 201 is provided with an annular oil channel 203 with a rectangular cross section, which communicates with the oil inlet end of the hydraulic cylinder 204, and the oil cylinder cover 202 is also provided along the axis for supplying the annular oil. Road 203 is an oil supply passage for oil supply. The inner and outer sides of the annular oil passage 203 are respectively provided with an O-shaped sealing ring, and the O-shaped sealing ring is embedded on the side of the cylinder cover 202 close to the cylinder body 201 to prevent the hydraulic oil in the annular oil passage 203 from There is a leak.

The first accompanying device 11 includes a radially loaded bearing 1101 sleeved on the inner ring rotor shaft 12, preferably a cylindrical roller bearing. The outer ring of the radially loaded bearing 1101 is pressed into the inner hole of the radially loaded bearing seat 1102, and the radially loaded bearing seat 1102 is also fixedly connected with a radially loaded bearing oil distribution plate 1103, and the radially loaded bearing oil distribution plate 1103 is The radially loaded bearing 1101 provides lubricating oil and gas and axially fixes the outer ring of the radially loaded bearing 1101 . The inner ring of the radially loaded bearing 1101 is fixed by the axial shoulder structure on the inner ring rotor shaft 12 and the third stepped sleeve 1105, and the third stepped sleeve 1105 is arranged on the radially loaded bearing 1101 away from the outer ring rotor shaft. 5 side of the working end. Because the radially loaded bearing 1101 is subjected to radial load during operation, the radially loaded bearing seat 1102 is not connected with the machine body seat 1 and is floating. In order to reduce the impact of external vibration on the rotor shafting during the test, a groove is also opened on the upper part of the radially loaded bearing seat 1102, and a buffer pad 1104 is arranged in the groove.

The radial loading device 10 includes an inverted "V"-shaped oil cylinder bracket 1001, the bottom ends of the two branches of the "V" shape are fixed on the body seat 1 and the inner ring rotor shaft 12 is arranged between the two branches. A radial loading oil cylinder 1004 is arranged on the V"-shaped intersection, and the radial loading oil cylinder 1004 drives the radial loading oil cylinder plunger 1005, and a sensor mounting plate 1002 and a sensor mounting plate are also arranged at the load output end of the radial loading oil cylinder plunger 1005 The bottom of 1002 is equipped with load cell 1003. During the test, the radial loading oil cylinder 1004 drives the radial loading oil cylinder plunger 1005 to move downward, and the axial load is applied to the buffer pad 1104 through the load sensor 1003 . By adding the buffer pad 1104, the shock-absorbing and wear-resistant link is added to the radial loading process, which effectively reduces the influence of external vibration on the rotor shafting of the radial loading bearing seat 1102 during the test process, and can prevent the vibration from affecting the loading force signal. Acquisition and measurement have an impact.

The second accompanying test device 8 includes an accompanying cylindrical roller bearing 801 sleeved on the outer ring rotor shaft 5, the outer ring of which is pressed into the inner hole of the accompanying cylindrical roller bearing housing 804 and passed through the accompanying cylindrical roller bearing. The sub-bearing oil distribution plate 802 is axially limited and fixed, and the inner ring is fixed by the shaft shoulder provided on the rotor shaft 5 of the outer ring and the second stepped sleeve 806 is axially limited and fixed, and the second stepped sleeve 806 is set on the test cylindrical roller The bearing 801 is away from the side of the working end of the inner ring rotor shaft 12 . The oil distribution plate 802 of the accompanying test cylindrical roller bearing is fixedly arranged on the accompanying test cylindrical roller bearing housing 804, which not only limits the axial position of the outer ring of the accompanying test cylindrical roller bearing 801, but also is used to 801 for oil-air lubrication. A second accompanying test device gland 805 is also arranged on the upper part of the accompanying test cylindrical roller bearing housing 804, and the second accompanying test device gland 805 is fixedly connected with the body seat 1, and the second accompanying test device glands are fixedly installed on both sides respectively. Ring I807 and the second accompanying test device pressure ring II803, the two pressure rings are fixedly connected with the second test device gland 805 and the body seat 1 through a number of screws evenly arranged along the circumferential direction, so that the test cylinder rolls The sub-bearing seat 804 is axially limited and fixed.

The cylindrical roller bearing double-rotor testing machine also includes a test cabin 14, the test cabin 14 is fixedly connected with the body seat 1, and the inner ring rotor shaft 12 and the outer ring rotor shaft 5 pass through the test cabin 14, and The test bearing tooling 13 is located in the test cabin in the middle of the test cabin body 14; the lower part of the test cabin body 14 is also fixedly provided with a ring lubricating oil supply plate 15 for spraying lubricating oil to the ring lubricating sleeve 1303. The under-ring lubricating oil supply plate 15 is provided with four oil inlet passages and nine oil injectors, and the direction of the oil injectors faces the oil receiving chamber of the under-annular lubricating sleeve 1303 . The optimized design of the under-ring lubrication oil supply plate 15 has a more compact structure, which is convenient for disassembly and debugging, and can flexibly adjust and change the oil supply mode according to the different requirements of the test bearing for the under-ring lubrication oil supply.

Described monitoring device 9 comprises the sensor mounting seat 901 that is arranged on the second accompanying test device gland 805, and sensor mounting seat 901 is also provided with sensor bracket 902, and sensor bracket 902 is provided with a vibration sensor sleeve, and vibration sensor sleeve A vibration sensor 903 is arranged inside the cylinder, and its sensing end is close to the test end of the outer ring rotor shaft 5; the monitoring device 9 also includes a noise sensor 904 and two temperature sensors arranged on the test cabin 14, and the two temperature sensors are respectively The temperature of the test bearing 1301 inner and outer rings was monitored. The noise sensor 904 and the two temperature sensors are both arranged in the sensor sleeve communicating with the interior of the test chamber 14 . The temperature sensor is preferably an infrared temperature sensor, the vibration sensor 903 is preferably an eddy current 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 during the test, the inversion sensitivity is reduced. Therefore, an air inlet pipe is connected to the side wall of the sensor sleeve, and the air is continuously blown into the test cabin body 14 during the test. Inject the gas, and use the air flow to prevent the lubricating oil from entering the sensor sleeve and polluting the sensor.

The body seat 1 is also covered with a body cover 7, and a body end cover 6 is respectively arranged at both ends of the body seat 1; a pipeline inlet 101, an oil discharge port 102 and an oil-gas separation are respectively provided on the side of the body seat 1. Outlet 103: a number of warp and latitudinal reinforcing ribs are evenly arranged on the inner surface of the body cover 7, and a radial loading device through hole 701 is also opened on the top of the body cover 7. The radial loading device 10 passes through the radial loading device through hole 701 on the machine cover 7, so that the machine cover 7 is not subjected to radial loading force, and the test can be carried out without installing the machine cover when the test speed and temperature are low , which simplifies the test process and improves the test efficiency.

The stepped structures of the first stepped sleeve 3011, the second stepped sleeve 806, the third stepped sleeve 1105 and the fourth stepped sleeve 1302 are all arranged on the inner wall, specifically, an annular recess with a rectangular section is dug in the middle of the inner wall. slots to form a ladder structure. And there is an oil filling channel on each step sleeve, the oil filling channel is opened on the side wall of the step sleeve, perpendicular to the axis of the step sleeve and connected with the ladder structure of the inner wall of the step sleeve, and on the side wall of the step sleeve There is also a balance hole, which has the same structure as the oil filling channel and is symmetrical about the axis of the stepped sleeve, but the balance hole is not connected with the stepped structure of the inner wall of the stepped sleeve. By setting the balance hole, the structure and stress of the stepped sleeve during rotation can be guaranteed to be stable, and the structure will not be damaged due to uneven structure.

After optimized design and testing, the positional relationship of each part of the device is: in the horizontal direction, take the non-test end of the inner ring rotor shaft 12 as point a, the support bearing 302 on the inner ring rotor shaft 12 as point A, and radially load Bearing 1101 is point B, test bearing 1301 is point F, accompanying test cylindrical roller bearing 801 is point C, supporting bearing 302 on outer ring rotor shaft 5 is at point D, and the non-test end of outer ring rotor shaft 5 is a' point, the position relationship of each point is BF=CF, AB=CD, aF=Da', BF/AB=CF/CD=5.25, AB/aA=CD/Da'=2.47. The optimized support position of each bearing in the shaft system not only ensures the effective loading of the test bearings, but also improves the stress of the test cylindrical roller bearings and radially loaded bearings. The service life of the testing machine is prolonged, and the reliability and stability of the testing machine are improved.

The working process of the axial loading device 2 is as follows: according to the demand of the supporting bearing 302 for the pre-tightening force, an appropriate pre-tightening spring 205 is selected. to the pretightening force; after the start of the test, with the increase of the rotational speed, the axial load required by the support bearing 302 gradually increases, and at this time, the hydraulic cylinder 204 outputs the load to the pressure ring 309 to meet the requirements of the support bearing 302 for the axial load. Requirements: During the test, the force sensor 3010 monitors the axial load borne by the pressure ring 309 in real time, and converts the monitored load into a digital signal through a signal transmitter, which is fed back to the oil pressure control device, and the oil pressure Accordingly, the control device adjusts the oil pressure delivered to the hydraulic cylinder 204 in real time, thereby adjusting the axial load. The combined loading method of spring preloading and hydraulic follow-up loading can not only meet the requirements of the support bearing 302 for the preloading force, but also continuously adjust the axial load, which is suitable for different test requirements. Compared with single spring loading, this loading method has a high degree of controllability of loading force, uniform load output, and gentle changes. Compared with single hydraulic loading, this loading method can solve the dead zone problem existing in the hydraulic loading system, and can also rely on spring loading to keep each device from being damaged when the hydraulic system fails.

The working process of the radial loading device 10 is as follows: after the test starts, the radial loading cylinder 1004 drives the radial loading cylinder plunger 1005 to move downward to apply a radial load, and the radial load acts on the radial loading bearing seat In the buffer pad 1104 above 1102, the radial load is transmitted to the radially loaded bearing 1101 through the radially loaded bearing seat 1102, and the radially loaded bearing 1101 transmits the radial load to the inner ring rotor shaft 12, and then to the test bearing 1301, and the radial load is completed. applied to the load. The radial loading oil cylinder 1104 is also connected with an automatic control device, which continuously adjusts the load amount of the radial load as the test conditions change. The adjustment process is similar to the adjustment process of the axial load and will not be repeated here.

The fixing method of the whole machine is as follows: the body base 1 is horizontally fixed on the base through anchor bolts, and the machine cover 10 is fixed on the body base 1 through 18 bolts and washers totaling 36 M8*35 on each side. On the body seat 1 at the junction of the body seat 1, an O-shaped sealing ring is installed by digging a groove; a machine base end cover 9 is provided at each end, and each machine base end cover 9 passes 18 M10*30 bolts And the gasket fixes the machine base end cover 9 on the body seat 1 and the machine cover 10, and the groove of the machine base end cover 9 is equipped with an O-ring.

After testing, the inner ring rotor shaft 12 and the outer ring rotor shaft 5 can drive 30,000rpm in the same direction or in different directions respectively, the inner diameter of the test bearing 1301 can be greater than or equal to 140mm, the oil supply temperature under the inner ring can reach 150°C, and the working temperature Reach 260°C, radial load 60KN.

Claims (9)

1. A cylindrical roller bearing double-rotor testing machine, comprising a body base (1), a rotor shaft arranged on the body base (1), and a radial load bearing set above the rotor shaft and fixedly connected to the body base (1). device (10) and monitoring device (9), the first accompanying test device (11), the test bearing tooling (13) and the second accompanying test device (8) are sequentially arranged on the rotor shaft, and the two ends of the rotor shaft are also provided with There is a supporting device (3), characterized in that: The rotor shaft is composed of an inner ring rotor shaft (12) and an outer ring rotor shaft (5), and the test bearing tooling (13) has an under-ring lubricating sleeve (1303) sleeved on the inner ring rotor shaft (12). end, the test bearing (1301) is set on the lubricating sleeve (1303) under the ring, and the outer ring of the test bearing (1301) is pressed into the inner hole of the test end of the rotor shaft (5) of the outer ring; The support device (3) includes an axially loaded bearing (301) and a supporting bearing (302) arranged side by side, the axially loading bearing (301) and the supporting bearing (302) are both sleeved on the rotor shaft and the supporting bearing (302 ) is located on the inner side of the axially loaded bearing (301), and an axially loaded device (2) is also provided on the outer side of the axially loaded bearing (301). 2. A cylindrical roller bearing double-rotor testing machine according to claim 1, characterized in that: the test bearing tooling (13) also includes a fourth stepped sleeve (1302) and a test bearing pressure ring (1304), Among them, the fourth stepped sleeve (1302) is sleeved on the lower ring lubricating sleeve (1303), and cooperates with the shoulder structure provided on the outer wall of the lower ring lubricating sleeve (1303) to axially limit the inner ring of the test bearing (1301). Fixing, the test bearing pressure ring (1304) is fixed on the test end of the outer ring rotor shaft (5) and the outer ring of the test bearing (1301) is axially limited and fixed. 3. A cylindrical roller bearing double-rotor testing machine according to claim 1, characterized in that: the first accompanying test device (11) includes a radial loading device sleeved on the inner ring rotor shaft (12) Bearing (1101), the outer ring of the radially loaded bearing (1101) is pressed into the inner hole of the radially loaded bearing seat (1102), and the radially loaded bearing seat (1102) is also fixedly connected with the oil distribution plate of the radially loaded bearing (1103), the radial load bearing oil distribution plate (1103) provides lubricating oil to the radial load bearing (1101) and axially fixes the outer ring of the radial load bearing (1101). 4. A cylindrical roller bearing double-rotor testing machine according to claim 3, characterized in that: the radial loading device (10) includes an inverted "V"-shaped oil cylinder bracket (1001), "V" The bottom ends of the two branches of the "V" shape are fixed on the body seat (1) and the inner ring rotor shaft (12) is set between the two branches, and a radial loading oil cylinder (1004 ), the radial loading cylinder (1004) drives the radial loading cylinder plunger (1005), and the load output end of the radial loading cylinder plunger (1005) is also provided with a sensor mounting plate (1002), a sensor mounting plate (1002) The lower part of the radial load sensor (1003) is installed. 5. A cylindrical roller bearing double-rotor testing machine according to claim 1, characterized in that: the second accompanying test device (8) includes an accompanying test cylindrical roller sheathed on the outer ring rotor shaft (5) Sub-bearing (801), the outer ring of which is pressed into the inner hole of the accompanying test cylindrical roller bearing seat (804) and fixed by the axial limit of the accompanying test cylindrical roller bearing oil distribution plate (802), and the accompanying test cylindrical roller bearing The sub-bearing oil distribution plate (802) is fixedly arranged on the accompanying test cylindrical roller bearing seat (804), and the second accompanying test device gland (805) is also arranged on the upper part of the accompanying test cylindrical roller bearing seat (804). The second accompanying test device gland (805) is fixedly connected with the body seat (1) and the second accompanying test device pressing ring I (807) and the second accompanying testing device pressing ring II (803) are respectively fixedly arranged on both sides. A pressure ring fixes the axial limit of the accompanying test cylindrical roller bearing seat (804); the monitoring device (9) includes a sensor mounting seat (901) arranged on the gland (805) of the second accompanying test device, and the sensor The mounting base (901) is also provided with a sensor bracket (902), and a vibration sensor sleeve is provided on the sensor bracket (902), and a vibration sensor (903) is installed in the vibration sensor sleeve, and its sensing end is close to the rotor shaft of the outer ring (5) The test end. 6. A cylindrical roller bearing double-rotor testing machine according to claim 1, characterized in that: the cylindrical roller bearing double-rotor testing machine also includes a test cabin (14), the test cabin (14) and The body seat (1) is fixedly connected, the inner ring rotor shaft (12) and the outer ring rotor shaft (5) pass through the test cabin (14), and the test bearing tooling (13) is located in the test cabin (14 ) in the middle part of the test cabin; the lower part of the test cabin (14) is also fixedly provided with a ring lubricating oil supply plate (15) for spraying lubricating oil to the ring lubricating sleeve (1303); the monitoring device (9) It includes a noise sensor (904) and two temperature sensors arranged on the test cabin body (14), and the two temperature sensors monitor the temperature of the inner ring and the outer ring of the test bearing (1301) respectively. 7. A cylindrical roller bearing double-rotor testing machine according to claim 1, characterized in that: the support device (3) also includes a fixed bearing seat (303) fixedly connected to the outer ring of the support bearing (302) and the floating bearing seat (306) fixedly connected with the outer ring of the axially loaded bearing (301), an integral gland (305) is also arranged on the upper part of the fixed bearing seat (303) and the floating bearing seat (306), and the integral gland (305) is fixedly connected with the body seat (1), and on the side of the integral gland (305) close to the test bearing tooling (13) is also fixedly connected with a fixed bearing seat for axially limiting the fixed bearing seat (303) Pressure ring (304); there is a gap between the fixed bearing seat (303) and the floating bearing seat (306), and a two-way oil injection plate (308) is arranged in the gap, and the oil injection plate (308) The nozzles are respectively facing the outer ring raceways of the support bearing (302) and the axially loaded bearing (301); the side of the floating bearing seat (306) close to the axially loaded device (2) is also embedded with a pressure ring ( 309). 8. A cylindrical roller bearing double-rotor testing machine according to claim 7, characterized in that: the axial loading device (2) includes a cylinder block (201) and an oil cylinder cover plate (202) arranged side by side, Among them, the cylinder body (201) is set close to the floating bearing seat (306), and several through-holes and several blind holes are uniformly and alternately opened on the cylinder body (201) in a ring shape, and the through-holes and blind holes are arranged along the axial direction and The opening of the blind hole faces the floating bearing seat (306), and a pre-tightening spring (205) is arranged in the blind hole, and a hydraulic cylinder (204) is arranged in the through hole; the oil cylinder cover (202) is close to the cylinder body ( One side of 201) is provided with an annular oil passage (203) with a rectangular cross-section, which communicates with the oil inlet end of the hydraulic cylinder (204). On the oil cylinder cover (202), there is also an annular oil passage (203) along the axis for 203) Oil supply channel for oil supply. 9. A cylindrical roller bearing double-rotor testing machine according to claim 1, characterized in that: the body base (1) is covered with an organism cover (7), and at both ends of the body base (1) Each is provided with a body end cover (6); the side of the body seat (1) is provided with a pipeline inlet (101), an oil discharge port (102) and an oil-gas separation outlet (103); on the side of the body cover (7) A number of warp and latitudinal reinforcing ribs are evenly arranged on the inner surface, and a radial loading mechanism hole (1001) is provided on the top of the body cover (7).