CN104568443B - Space rolling bearing comprehensive performance experiment device - Google Patents

Abstract

The invention discloses an experimental device for the comprehensive performance of a space rolling bearing, relates to an experimental device, and provides a device capable of accurately measuring the friction torque, bearing temperature rise, and vibration of a space rolling bearing under combined axial and radial loads and different speed conditions. Experimental setup with basic data. Through the axial loading device and the radial loading device, the present invention can carry out precise loading of axial force and radial force on the tested bearing at the same time; the three-axis acceleration sensor is used to measure the radial, axial and circumferential vibration conditions of the tested bearing The temperature sensor is used to measure the temperature rise of the bearing under test; the pressure sensor is used to measure the friction torque of the bearing under test; the ring pressure sensor is used to measure the axial force on the bearing under test; radial force. The invention can be used to evaluate the comprehensive performance of space rolling bearings, and provide key scientific and technical basis and test platform support for developing high-end bearings in my country's aerospace field.

Description

Experimental device for comprehensive performance of space rolling bearings

technical field

The invention relates to an experimental device, in particular to an experimental device for comprehensive performance detection of rolling bearings under space environment conditions.

Background technique

Bearings are key components necessary for supporting and maintaining the aerospace industry, and are closely related to the development and technological progress of the aerospace industry. The technical level, performance and quality of bearings directly affect the performance life and reliability of aircraft, rockets, satellites and other aerospace vehicles. Compared with civilian bearings, space rolling bearings have very strict requirements in terms of precision, speed, sensitivity, life, reliability, temperature, vacuum, corrosion, radiation, etc. In order to meet these requirements, corresponding technical measures must be taken in all aspects of bearing design, material selection, processing, testing, testing, lubrication, use, and maintenance. Therefore, inventing an experimental platform for comprehensive performance of space rolling bearings, accurately grasping the dynamic service behavior of space rolling bearings, and establishing a database of comprehensive performance of bearings has important scientific significance and engineering practical value for improving the technical level of space rolling bearings in my country.

In the prior art, the comprehensive performance testing methods for rolling bearings are not perfect, and there is no experimental device that can truly and completely simulate the actual working conditions of space rolling bearings, especially the axial and radial loading are not considered at the same time, especially the impact of rotational speed and load on the bearing cannot be accurately measured. The frictional torque, temperature rise, and vibration of space rolling bearings affect the relationship, so that the failure mechanism and tribological properties of space rolling bearings cannot be truly grasped.

Contents of the invention

The technical problem to be solved by the present invention is to provide an experimental device for the comprehensive performance of space rolling bearings, which can accurately measure the friction torque, bearing temperature rise, vibration And other basic data, in order to evaluate the comprehensive performance of space rolling bearings, and provide key scientific and technological basis and test platform support for the development of high-end bearings in my country's aerospace field.

The technical solution adopted to solve the above problems is: the space rolling bearing comprehensive performance experiment device includes a space environment simulation device with a test bench installation platform inside and a space rolling bearing test bench located in the space environment simulation device; the space rolling bearing test bench includes Space rolling bearings to be tested, loaded bearing housings, bearing rings, transmission devices, supporting devices, axial loading devices, radial loading devices and detection devices;

The transmission device includes a vacuum high and low temperature motor and an experimental spindle, and the vacuum high and low temperature motor can drive the experimental spindle to rotate;

The support device includes a motor mounting support, a torque speed sensor mounting support and a main shaft support device; the motor mounting support is installed on the test bench installation platform and supports the vacuum high and low temperature motor; the two ends of the experimental main shaft are respectively supported by the main shaft support device, The main shaft supporting device includes a supporting bearing, a supporting bearing mounting bracket and a supporting bearing seat end cover. The inner ring of the supporting bearing is installed on the experimental spindle, the outer ring of the supporting bearing is installed in the bearing hole of the supporting bearing mounting bracket, and the supporting bearing seat is The end cover is connected with the support bearing installation support by fastening screws, the support bearing end cover and the shoulder of the experimental spindle are axially positioned to support the bearing, and the support bearing installation support is installed on the test bench installation platform;

The tested space rolling bearing is set on part of the experimental main shaft between two main shaft supporting devices. The number of tested space rolling bearings is two and installed face-to-face or back-to-back; the bearing collar is set on the experimental main shaft and located between the two tested space rolling bearings. between;

The loading bearing seat is set on the outer ring of the rolling bearing in the measured space. One end of the loading bearing seat is provided with a positioning step, and the other end is connected to the axial loading device. The outer surface of the loading bearing seat is connected to the radial loading device. The shaft shoulder of the experimental spindle, the positioning step and The axial loading device co-axially locates the space rolling bearing to be tested;

The axial loading device includes the end cover of the bearing seat, the spring and the retaining ring arranged in sequence along the axial direction of the experimental spindle; the end cover of the bearing seat is connected to the bearing seat through six uniformly distributed loading screws on the circumference and compresses the spring, and the retaining ring is located at Between the spring and the space rolling bearing to be tested;

The radial loading device includes a radial loading plate, a loading weight and a hook, the hook is connected to the loading bearing seat, the radial loading plate is hung on the hook, and the loading weight is put into the radial loading plate;

The detection device includes a torque speed sensor, a three-axis acceleration sensor, an annular pressure sensor, a temperature sensor and a friction torque detection device; the torque speed sensor is set between the vacuum high and low temperature motor and the experimental spindle, and is connected to the vacuum high and low temperature through an elastic coupling. The motor is connected to the main shaft of the experiment, and the torque speed sensor is supported by the torque speed sensor mounting support; the three-axis acceleration sensor is connected to the loading bearing; the annular pressure sensor is located between the rolling bearing and the retaining ring in the measured space; the temperature sensor is connected to the loading bearing seat and Rolling bearings close to the measured space; the friction torque detection device includes a dowel bar, a pressure sensor and a pressure sensor mounting support, the dowel bar is connected to the loading bearing seat, the pressure sensor mounting support is installed on the test bench installation platform, the pressure sensor and The pressure sensor mounting bracket is connected to and contacts the dowel bar.

Further: the supporting bearing is a solid lubricating bearing

Further, the vacuum high and low temperature motor, torque speed sensor, three-axis acceleration sensor, annular pressure sensor, temperature sensor and pressure sensor are all connected to the outside world through the aviation socket set on the space environment simulation device.

The beneficial effects of the present invention are as follows: 1. The space rolling bearing comprehensive performance test device of the present invention, through the axial loading device and the radial loading device, can carry out precise loading of axial force and radial force on the tested bearing at the same time. Axial force loading is realized by tightening the loading screw, and the axial force is transmitted to a rolling bearing in the measured space through the retaining ring and the annular pressure sensor in turn, and at the same time, the axial force is transmitted to the other rolling bearing in the measured space through the positioning steps on the loading bearing seat. The spring also acts as a buffer unit, and the axial loading device can realize accurate and stable loading of the bearing under test. By putting standard weights on the radial loading plate, the radial force can be loaded accurately and stably; the loading method is not only simple in structure and easy to operate, but also accurate and reliable.

2. The torque speed sensor is used to measure the rotational speed and input torque of the tested bearing; the three-axis acceleration sensor is used to measure the radial, axial and circumferential vibration of the tested bearing; the temperature sensor is used to measure the temperature rise of the tested bearing ; The pressure sensor is used to measure the frictional moment of the bearing under test; the annular pressure sensor is used to measure the axial force on the bearing under test; the weight is used to indicate the radial force on the bearing under test. Therefore, this experimental device can accurately measure basic data such as friction torque, bearing temperature rise, vibration and other basic data of space rolling bearings under combined axial and radial loads and different speed conditions, so as to evaluate the comprehensive performance of space rolling bearings and provide a basis for the development of my country's aerospace industry. High-end bearings in the field provide key scientific and technological basis and test platform support.

Description of drawings

Fig. 1 is the front view of the space rolling bearing comprehensive performance experiment device;

Figure 2 is a partial enlarged view of the space rolling bearing comprehensive performance experimental device at the loading bearing seat;

Figure 3 is a partial side view of the space rolling bearing comprehensive performance experimental device at the loading bearing seat;

The marks in the figure are: space environment simulation device 1, vacuum high and low temperature motor 2, elastic coupling 3, torque speed sensor 4, aviation socket 5, support bearing housing end cover 6, fastening screw 7, support bearing 8, loading Bearing seat 9, three-axis acceleration sensor 10, space rolling bearing under test 11, bearing collar 12, annular pressure sensor 13, retaining ring 14, spring 15, loading screw 16, loading bearing seat end cover 17, experimental spindle 18, test bench Frame installation platform 19, temperature sensor 20, support bearing installation support 21, torque speed sensor installation support 22, support device includes motor installation support 23, pressure sensor 24, pressure sensor installation support 25, loading weight 26, Radial loading disc 27, dowel 28.

detailed description

The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

As shown in Figures 1 to 3, the space rolling bearing comprehensive performance experimental device includes a space environment simulation device 1 with an experimental bench installation platform 19 inside and a space rolling bearing test bench located in the space environment simulation device 1; the space rolling bearing test bench The frame includes a space rolling bearing 11 to be tested, a loading bearing seat 9, a bearing collar 12, a transmission device, a supporting device, an axial loading device, a radial loading device and a detection device;

The transmission device includes a vacuum high and low temperature motor 2 and an experimental spindle 18, and the vacuum high and low temperature motor 2 can drive the experimental spindle 18 to rotate;

The supporting device includes a motor mounting support 23, a torque speed sensor mounting support 22 and a main shaft support device; the motor mounting support 23 is installed on the experimental bench mounting platform 19 and supports the vacuum high and low temperature motor 2; the two ends of the experimental main shaft 18 are respectively Supported by the main shaft support device, the main shaft support device includes a support bearing 8, a support bearing mounting support 21 and a support bearing housing end cover 6, the inner ring of the support bearing 8 is installed on the experimental main shaft 18, and the outer ring of the support bearing 8 is installed on the support In the bearing hole of the bearing mounting support 21, the supporting bearing seat end cover 6 is connected with the support bearing mounting support 21 through the fastening screw 7, and the shaft shoulder of the supporting bearing seat end cover 6 and the experimental spindle 18 is axially positioned to support the bearing 8. The support bearing installation support 21 is installed on the test bench installation platform 19;

The space rolling bearing 11 to be tested is arranged on a part of the experimental main shaft 18 between the two main shaft supporting devices. The number of the space rolling bearings 11 to be tested is two and installed face-to-face or back-to-back; the bearing collar 12 is set on the experimental main shaft 18 and located Between the space rolling bearings 11 to be tested;

The loading bearing seat 9 is set on the outer ring of the space rolling bearing 11 to be tested. One end of the loading bearing seat 9 is provided with a positioning step, and the other end is connected to the axial loading device. The outer surface of the loading bearing seat 9 is connected to the radial loading device. The shoulder, the positioning step and the axial loading device jointly axially position the space rolling bearing 11 under test;

The axial loading device includes a loading bearing seat end cover 17, a spring 15 and a retaining ring 14 arranged in sequence along the axial direction of the experimental main shaft 18; the loading bearing seat end cover 17 is connected to the loading bearing seat 9 through six circumferentially evenly distributed loading screws 16 And compress the spring 15, the retaining ring 14 is located between the spring 15 and the measured space rolling bearing 11;

The radial loading device includes a radial loading disc 27, a loading weight 26 and a hook, the hook is connected to the loading bearing seat 9, the radial loading disc 27 is hung on the hook, and the loading weight 26 is put into the radial loading disc 27;

The detection device includes a torque speed sensor 4, a triaxial acceleration sensor 10, an annular pressure sensor 13, a temperature sensor 20 and a friction torque detection device; the torque speed sensor 4 is arranged between the vacuum high and low temperature motor 2 and the experimental main shaft 18 and is passed through an elastic The coupling 3 is connected with the vacuum high and low temperature motor 2 and the experimental main shaft 18, the torque speed sensor mounting support 22 supports the torque speed sensor 4; the three-axis acceleration sensor 10 is connected with the loading bearing 9; the annular pressure sensor 13 is located in the measured space Between the rolling bearing 11 and the retaining ring 14; the temperature sensor 20 is connected to the loaded bearing seat 9 and is close to the rolling bearing 11 in the measured space; the friction torque detection device includes a dowel 28, a pressure sensor 24 and a pressure sensor mounting support 25, and the dowel 28 is connected with the loading bearing seat 9, and the pressure sensor mounting support 25 is installed on the test bench mounting platform 19, and the pressure sensor 24 is connected with the pressure sensor mounting support 25 and contacts with the dowel bar 28.

The space environment simulation device 1 is used for simulating a space environment, such as a low pressure, low temperature or high temperature environment. The vacuum high and low temperature motor 2 is a motor capable of operating in a space environment. Because of running under the space environment, the supporting bearing 8 should be a solid lubricating bearing. Vacuum high and low temperature motor 2, torque speed sensor 4, triaxial acceleration sensor 10, annular pressure sensor 13, temperature sensor 20 and pressure sensor 24 all need to be powered by the outside world or transmit data with the outside world, so they all need to be connected to the outside world. In the present invention, the vacuum high and low temperature motor 2, the torque speed sensor 4, the triaxial acceleration sensor 10, the annular pressure sensor 13, the temperature sensor 20 and the pressure sensor 24 all communicate with the outside world through the aviation socket 5 arranged on the space environment simulation device 1. connect.

The experimental device for the comprehensive performance of the space rolling bearing of the present invention, through the axial loading device and the radial loading device, can carry out precise loading of the axial force and the radial force on the measured space rolling bearing 11 at the same time. Axial force loading is achieved by tightening the loading screw 16, and the axial force is transmitted to a rolling bearing 11 in the measured space through the retaining ring 14 and the annular pressure sensor 13 in turn, and the axial force is transmitted to the other through the positioning step on the loading bearing seat 9. For the space rolling bearing 11 under test, the spring 15 also serves as a buffer unit, and the axial loading device can realize precise and stable loading on the bearing under test. By placing the standard weight 26 on the radial loading plate 27, the radial force can be loaded accurately and stably; the loading method is not only simple in structure and easy to operate, but also accurate and reliable.

The torque speed sensor 4 is used to measure the rotational speed and input torque of the tested space rolling bearing 11; the triaxial acceleration sensor 10 is used to measure the radial, axial and circumferential vibrations of the tested space rolling bearing 11; the temperature sensor 20 is used to measure the Measure the temperature rise of the space rolling bearing 11; the pressure sensor 24 is used to measure the friction torque of the space rolling bearing 11 under test; the annular pressure sensor 13 is used to measure the axial force on the tested bearing; the weight 26 is used to indicate the force on the tested bearing radial force. Therefore, this experimental device can accurately measure basic data such as friction torque, bearing temperature rise, and vibration of the measured space rolling bearing 11 under combined axial and radial loads and different speed conditions, so as to evaluate the comprehensive performance of the space rolling bearing and provide a basis for development. High-end bearings in my country's aerospace field provide key scientific and technological basis and test platform support.

The pressure sensor 24 measures the friction torque of the space rolling bearing 11 under test as follows: the friction torque of the space rolling bearing 11 under test is converted into a friction force, and the friction force is transmitted to the pressure sensor 24 through the dowel rod 28 so that the dowel rod 28 gives the pressure sensor 24 pressure F, the pressure F measured by the pressure sensor 24, the center distance between the pressure sensor 24 and the measured space rolling bearing 11 is l, the friction torque of the space rolling bearing 11 can be calculated by the formula M=F×l.

Claims (3)

1. Space Rolling Bearing comprehensive characteristic test device, it is characterised in that：Including being internally provided with experimental stand mounting platform (19) space-environment simulator (1) and the Space Rolling Bearing experimental stand in space-environment simulator (1)；It is empty Between rolling bearing experimental stand include detected space rolling bearing (11), loading axis bearing (9), the bearing collar (12), transmission dress Put, support meanss, axial loading device, radial loading device and detection means；

Transmission device includes vacuum high/low temperature motor (2) and experiment main shaft (18), and vacuum high/low temperature motor (2) can drive experiment Main shaft (18) rotates；

Support meanss include motor erection support (23), torque rotary speed sensor erection support (22) and main shaft support device；Electricity Machine erection support (23) is on experimental stand mounting platform (19) and supports vacuum high/low temperature motor (2)；Experiment main shaft (18) two ends are supported respectively by main shaft support device, and main shaft support device includes spring bearing (8), spring bearing erection support (21) and supporting bearing base end cap (6), the inner ring of spring bearing (8) is arranged in experiment main shaft (18), spring bearing (8) outer ring In the dead eye of supporting bearing erection support (21), supporting bearing base end cap (6) is by trip bolt (7) and bearing axle The common axial direction position support shaft of the shaft shoulder for holding erection support (21) connection, supporting bearing base end cap (6) and experiment main shaft (18) is held (8), spring bearing erection support (21) is on experimental stand mounting platform (19)；

Detected space rolling bearing (11) is arranged on the part Experiment main shaft (18) between two pieces main shaft support device, tested sky Between rolling bearing (11) quantity be two pieces and face-to-face or back-to-back installation；The bearing collar (12) is sleeved in experiment main shaft (18) And between two pieces detected space rolling bearing (11)；

Loading axis bearing (9) is vacantly arranged, and loading axis bearing (9) is sleeved on detected space rolling bearing (11) outer ring, is loaded Bearing block (9) one end is provided with positioning step, other end connection axial loading device, loading axis bearing (9) outer surface connection footpath To charger, the common axially position detected space of the shaft shoulder, positioning step and axial loading device for testing main shaft (18) is rolled Bearing (11)；

Loading axis bearing end cap (17) that axial loading device includes axially being set gradually along experiment main shaft (18), spring (15) and Back-up ring (14)；Loading axis bearing end cap (17) is connected by the load screw (16) of six circumference uniform distributions with loading axis bearing (9) And compression spring (15), back-up ring (14) is between spring (15) and detected space rolling bearing (11)；

Radial loading device includes radial loaded disk (27), loading counterweight (26) and hook, and hook is with loading axis bearing (9) even Connect, radial loaded disk (27) is hung on hook, loading counterweight (26) is put in radial loaded disk (27)；

Detection means includes torque rotary speed sensor (4), 3-axis acceleration sensor (10), annular pressure sensor (13), temperature Degree sensor (20) and moment of friction detection means；Torque rotary speed sensor (4) is arranged at vacuum high/low temperature motor (2) and experiment It is connected with vacuum high/low temperature motor (2) and experiment main shaft (18) between main shaft (18) and by yielding coupling (3), torque rotary speed Sensor erection support (22) supports torque rotary speed sensor (4)；3-axis acceleration sensor (10) and loading axis bearing (9) Connection；Annular pressure sensor (13) is between detected space rolling bearing (11) and back-up ring (14)；Temperature sensor (20) It is connected with loading axis bearing (9) and near detected space rolling bearing (11)；Moment of friction detection means include transmission rod (28), Pressure sensor (24) and pressure sensor erection support (25), transmission rod (28) is connected with loading axis bearing (9), pressure sensing Device erection support (25) on experimental stand mounting platform (19), pressure sensor (24) and pressure sensor erection support (25) connect and contact with transmission rod (28).

2. Space Rolling Bearing comprehensive characteristic test device according to claim 1, it is characterised in that：Spring bearing (8) For bearing with solid lubricant.

3. Space Rolling Bearing comprehensive characteristic test device according to claim 2, it is characterised in that：Vacuum high/low temperature electricity Machine (2), torque rotary speed sensor (4), 3-axis acceleration sensor (10), annular pressure sensor (13), temperature sensor (20) it is connected with the external world by the aviation socket (5) being arranged on space-environment simulator (1) with pressure sensor (24).