High-temperature radial air bearing performance testing device

Abstract

The utility model discloses a performance testing device for a high-temperature radial air bearing. The performance testing device generally comprises a heating and heat preservation module, a supporting and power module and a detection module, the heating and heat preservation module is composed of a heating bin, a hot air gun and heat preservation cotton. The supporting and power module comprises supporting structural parts, a radial supporting bearing, a high-speed motor, a stepping motor and the like. The detection module is composed of a pressure sensor, a pull pressure sensor, an eddy current displacement sensor, a thermocouple, an installation structural member and the like. In addition, a heat insulation structure is designed between each sensor and a heat source to prevent the sensors from being damaged by high temperature. The high-temperature radial air bearing performance testing device solves the problem that an existing device cannot test the performance of a radial air bearing in a high-temperature environment, and a high-precision and high-efficiency testing device is provided for testing the performance of the high-temperature radial air bearing.

Description

Technical Field

[0001] The utility model relates to the technical field of high-temperature radial air bearing performance detection, in particular to a test device for detecting the static stiffness, friction torque and temperature of a radial air bearing in a high-temperature environment. Background Art

[0002] Air bearings refer to bearing components that use gas as a lubricant. They can be divided into many different types according to the operating environment and load-bearing method. Among them, high-temperature radial air bearings are widely used in many fields such as gas turbines and compressors due to their high temperature resistance, low friction, low wear, and high speed.

[0003] However, due to the special high-temperature working environment, higher requirements are placed on bearing performance, making bearing performance testing particularly important. Existing testing methods cannot simulate the working environment of bearings in high-temperature environments. In addition, commonly used measuring instruments such as sensors are not suitable for high-temperature environments. Traditional test equipment has poor accuracy in measuring friction torque, is relatively complex in structure, and most testing methods only test a single attribute. There are few comprehensive testing devices for high-temperature radial air bearings. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model aims to provide a high-temperature radial air bearing performance testing device. By designing a heated and insulated chamber to simulate the operating environment of a high-temperature bearing, and by designing a thermal insulation structure between the structural components and the sensor to prevent damage to the sensor due to excessive temperatures, the overall design layout enables static stiffness testing of high-temperature radial air bearings, as well as friction torque and load-bearing performance testing in high-temperature environments.

[0005] To achieve the above objectives, the present invention discloses the following technical solutions:

[0006] A high-temperature radial air bearing performance test device mainly includes three modules connected in sequence: a heating and insulation module, a support and power module, and a detection module.

[0007] The heating and insulation module includes: a heating chamber, a hot air gun, and thermal insulation cotton. The heating chamber is made up of six stainless steel plates. There are two hot air guns, which respectively send high-temperature airflow into the heating chamber from the openings on the front and back walls of the heating chamber. The thermal insulation cotton covers the heating chamber.

[0008] The support and power module includes: a high-speed motor, a stepper motor, a radial support bearing, and supporting structures responsible for the installation and fixation of the above devices, including a high-speed motor bracket, an L-shaped bearing support seat, a sensor mounting plate, a tension and pressure sensor fixing block, a stepper motor vertical mounting plate, and a stepper motor horizontal mounting plate. The two radial support bearings are respectively placed in the internal holes of the two L-shaped bearing support seats;

[0009] The detection module includes: a friction torque transmission column, a friction torque transmission plate, a pressure sensor, a tension and pressure sensor, a thermocouple, an eddy current displacement sensor, and a test bearing mounting sleeve.

[0010] Furthermore, the hot air gun is an industrial hot air gun with two external temperature display screens.

[0011] Furthermore, the front and rear walls of the heating chamber are opened with holes, which are circular holes with a diameter of D1, and D1 is specifically 1.2 times the diameter d1 of the air outlet of the hot air gun.

[0012] Furthermore, the thermocouple is mounted on the front wall of the heating chamber via thermocouple fixing screws.

[0013] Furthermore, the lower end hole of the test bearing mounting sleeve is connected to the friction torque transmission column, the friction torque transmission plate, the tension and pressure sensor, and the tension and pressure sensor fixing block in sequence. The tension and pressure sensor fixing block is placed on the sensor mounting plate, and the pressure sensor is placed at the end of the stepper motor.

[0014] Furthermore, the friction torque transfer column is placed vertically, and the friction torque transfer plate is placed horizontally. The two are fixed by bolts with an angle of 90°. A tension and pressure sensor is placed at the end of the friction torque transfer plate, and one end of the sensor is fixed to the tension and pressure sensor fixing block by bolts.

[0015] Furthermore, the stepper motor is placed at the center of the stepper motor horizontal mounting plate, with the motor end facing downward.

[0016] Furthermore, it also includes a heat insulation material, which is installed at the connection between the stepping motor transmission rod and the tension and pressure sensor and at the connection between the friction torque transmission plate and the tension and pressure sensor through bolts.

[0017] Furthermore, the thickness of the thermal insulation cotton is not less than 5 mm.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] The utility model has the function of measuring various performance indicators of high-temperature radial air bearings in a high-temperature environment. For example, the design of the heating chamber simulates the working environment of the high-temperature radial air bearing;

[0020] Design a heat-insulating structure between the structural parts and the sensor to prevent damage to the sensor due to excessive temperature;

[0021] Through structural design and layout, the dynamic friction force of the bearing is transmitted to the tension and pressure sensor using the friction torque transfer column and the friction torque transfer plate, and the radial load of the bearing is simulated by a stepper motor, thereby realizing the test of friction torque and load-bearing performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the overall structure of the utility model;

[0023] Figure 2 This is a schematic diagram of the opening of the heating chamber of the utility model;

[0024] Figure 3 This is a schematic diagram of the detection module of the utility model;

[0025] Figure 4 This is a schematic diagram of the interior of the heating and heat preservation module of the present invention;

[0026] In the figure: 1-1 heating chamber, 1-2 hot air gun, 1-3 thermal insulation cotton, 1-4 heating air outlet, 2-1 high-speed motor, 2-2 high-speed motor bracket, 2-3 coupling, 2-4 shaft, 2-5 L-type bearing support seat (left and right walls of heating chamber), 2-6 stepper motor vertical mounting plate, 2-7 thermocouple fixing screw, 2-8 platform mounting plate, 2-9 hot air gun bracket, 2-10 eddy current displacement sensor bracket, 2-11 tension pressure sensor fixing block, 3-1 stepper motor transmission rod, 3-2 friction torque transmission column, 3-3 friction torque transmission plate, 3-4 bearing sleeve, 3-5 stepper motor, 3-6 pressure sensor, 3-7 insulation block, 3-8 tension pressure sensor, 3-9 insulation pad, 3-10 thermocouple, 3-11 eddy current displacement sensor DETAILED DESCRIPTION

[0027] The following will combine the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments, and the directional words such as up, down, left, and right mentioned in the text are limited to the positional relationship of the devices in the drawings. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0028] The structure of the present utility model is described in detail below with reference to the accompanying drawings.

[0029] Refer to the attached Figures 1 and 2, a high-temperature radial air bearing performance test device provided by the utility model is given, which mainly includes three modules: a heating and insulation module, a support and power module, and a detection module, wherein the heating and insulation module consists of a heating chamber 1-1, a hot air gun 1-2, and insulation cotton 1-3. The heating chamber is made of six stainless steel plates connected together, and the hot air gun is two industrial hot air guns with external temperature display screens. High-temperature air flow can be sent into the heating chamber from the openings on the front and rear walls of the heating chamber (heating air outlets 1-4). The insulation measure is to cover the heating chamber with insulation cotton 1-3 all around. The thickness of the insulation cotton is not less than 5mm. The insulation cotton can prevent the loss of heat in the chamber, thereby simulating the environment of the high-temperature radial air bearing working in a high-temperature environment; the support and power module includes a high-speed motor bracket 2-2, an L-shaped bearing support seat 2-5, and a sensor mounting plate , tension and pressure sensor fixing block 2-11, L-shaped support cover, stepper motor vertical mounting plate 2-6, stepper motor horizontal mounting plate, radial support bearing, high-speed motor 2-1, coupling 2-3, the high-speed motor can provide a certain speed and torque, the stepper motor can simulate the bearing input load, and other structural parts are responsible for the installation and fixation of high-speed motor, stepper motor, sensor, high-temperature radial air bearing and other devices; the detection module is composed of pressure sensor 3-6, tension and pressure sensor 3-8, eddy current displacement sensor 3-11, and thermocouple 3-10. The thermocouple 3-10 is fixed on the heating chamber by thermocouple fixing screws 2-7. The pressure sensor can measure radial load force, the tension and pressure sensor can measure friction torque, the eddy current displacement sensor can measure bearing amplitude, and the thermocouple can measure the temperature in the heating chamber. Among them, the insulation block 3-7 is installed at the connection between the stepper motor transmission rod 3-1 and the tension and pressure sensor by bolts, and the insulation pad 3-9 and the friction torque transmission plate are connected to the tension and pressure sensor. The insulation pad and insulation block are made of high-strength insulation materials such as aerogel.

[0030] Among them, the front and rear walls of the heating chamber 1-1 are opened, which are circular holes with a diameter of D1. D1 is specifically 1.2 times the diameter d1 of the hot air gun outlet.

[0031] Among them, the thermocouple 3-10 is installed on the front wall of the heating chamber through the thermocouple fixing screws.

[0032] Among them, the lower end hole of the test bearing mounting sleeve is connected to the friction torque transfer column 3-2, the friction torque transfer plate 3-3, the tension and pressure sensor 3-8, and the tension and pressure sensor fixing block 2-11 in sequence. The tension and pressure sensor fixing block is placed on the sensor mounting plate, and the pressure sensor is placed on the end of the stepper motor.

[0033] Among them, the friction torque transfer column 3-2 is placed vertically, and the friction torque transfer plate 3-3 is placed horizontally. The two are fixed by bolts with an angle of 90°. A tension and pressure sensor 3-8 is placed at the end of the friction torque transfer plate 3-3, and one end of the tension and pressure sensor is fixed to the tension and pressure sensor fixing block by bolts.

[0034] The stepper motors 3-5 are placed at the center of the stepper motor horizontal mounting plate, with the motor ends facing downward.

[0035] s1. Assembly of detection device

[0036] s11. First, fix the platform mounting plate 2-8, and connect and fix the high-speed motor 2-1 and two L-shaped bearing support seats 2-5 on the mounting plate in sequence. Place two radial support bearings in the inner holes of the two L-shaped bearing support seats, respectively. Install fixing brackets in the middle of the outer periphery of the two L-shaped bearing support seats 2-5, respectively. Install the L-shaped support cover plate, the stepper motor vertical mounting plate 2-6, and the stepper motor horizontal mounting plate on the upper ends of the two L-shaped bearing support seats.

[0037] s12. Install the air bearing device to be tested, pass the shaft 2-4 through the designed bearing sleeve 3-4 and other parts and clamp it with a clamp to prevent radial movement and rotation of the bearing;

[0038] s14. Connect the friction torque transmission column 3-2, friction torque transmission plate 3-3, tension and pressure sensor 3-8, and tension and pressure sensor fixing block 2-11 to the lower end hole of the test bearing mounting sleeve in sequence. Place the tension and pressure sensor fixing block on the sensor mounting plate, and place the pressure sensor 3-6 on the end of the stepper motor 3-5.

[0039] s13. Install the heating chamber and hot air gun 1-2. The two L-shaped bearing support seats 2-5 form the left and right walls of the heating chamber. The L-shaped support cover and the platform mounting plate 2-8 form the upper and lower walls of the heating chamber. The front and rear walls of the heating chamber are designed with heating air vents. Fix the hot air gun bracket to the platform mounting plate. The front air outlet of the heating gun enters along the heating air vent and overlaps the hole wall. The rear end is placed on the hot air blower bracket 2-9.

[0040] s15. Install the eddy current displacement sensor 3-11 and fix the eddy current displacement sensor 3-11 on the eddy current displacement sensor bracket 2-10 at the end of the shaft so that it does not contact the shaft 2-4.

[0041] s2. Functions of each sensor

[0042] s21, tension and pressure sensor

[0043] The tension and pressure sensor can measure the tension or pressure it is subjected to. It is used to measure the friction generated by the relative motion between the rotating shaft and the air during the high-speed operation of the air bearing, and then calculate the friction torque on the bearing. The calculation formula for its instantaneous value is as follows:

[0044]

[0045] Among them, M （t）为瞬时摩擦力矩，F（t）is the instantaneous value of the tension pressure sensor, L is the length of the force arm;

[0046] s22, eddy current displacement sensor

[0047] The eddy current displacement sensor is placed on the eddy current displacement sensor bracket at the end of the bearing to measure the relative displacement change between the shaft and the probe end face.

[0048] s23, pressure sensor

[0049] The pressure sensor has a measuring range of 50kg and is placed at the end of the stepper motor. During operation, the stepper motor drives the pressure sensor downward, causing the stepper motor drive rod connected to it to contact the test bearing mounting sleeve and apply pressure. This is used to detect the deformation of the air bearing when subjected to radial static load, and can also simulate the radial load of the bearing during dynamic testing.

[0050] s3. Data processing and performance evaluation

[0051] s31. Transmit the data collected by the sensors in each step of s2 to the computer and make corresponding curves, charts, etc.;

[0052] s32. Evaluate the measured air bearing data based on the specific research topic and use it as a reference for subsequent research.

[0053] The contents not described in detail in this specification belong to the prior art of professionals in this field.

[0054] The embodiments and principles described above provide a detailed description of the technical solutions of the present invention. For those skilled in the art, they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A high-temperature radial air bearing performance test device, characterized in that: It mainly includes three modules connected in sequence: heating and insulation module, support and power module, and detection module. The heating and insulation module includes: a heating chamber, a hot air gun, and thermal insulation cotton. The heating chamber is made up of six stainless steel plates. There are two hot air guns, which respectively send high-temperature airflow into the heating chamber from the openings on the front and back walls of the heating chamber. The thermal insulation cotton covers the heating chamber. The support and power module includes: a high-speed motor, a stepper motor, a radial support bearing, and supporting structures responsible for the installation and fixation of the above devices, including a high-speed motor bracket, an L-shaped bearing support seat, a sensor mounting plate, a tension and pressure sensor fixing block, a stepper motor vertical mounting plate, and a stepper motor horizontal mounting plate. The two radial support bearings are respectively placed in the internal holes of the two L-shaped bearing support seats; The detection module includes: a friction torque transmission column, a friction torque transmission plate, a pressure sensor, a tension and pressure sensor, a thermocouple, an eddy current displacement sensor, and a test bearing mounting sleeve.

2. A high-temperature radial air bearing performance testing device according to claim 1, characterized in that: The hot air gun is an industrial hot air gun with two external temperature display screens.

3. The high-temperature radial air bearing performance testing device according to claim 1, characterized in that: The front and rear walls of the heating chamber are opened with holes, which are circular holes with a diameter of D1, and D1 is specifically 1.2 times the diameter d1 of the air outlet of the hot air gun.

4. The high-temperature radial air bearing performance testing device according to claim 1, characterized in that: The thermocouple is mounted on the front wall of the heating chamber via thermocouple fixing screws.

5. The high-temperature radial air bearing performance testing device according to claim 1, characterized in that: The lower end hole of the test bearing mounting sleeve is connected to the friction torque transmission column, the friction torque transmission plate, the tension and pressure sensor, and the tension and pressure sensor fixing block in sequence. The tension and pressure sensor fixing block is placed on the sensor mounting plate, and the pressure sensor is placed on the end of the stepper motor.

6. The high-temperature radial air bearing performance testing device according to claim 1, characterized in that: The friction torque transmission column is placed vertically, and the friction torque transmission plate is placed horizontally. The two are fixed by bolts with an angle of 90°. A tension and pressure sensor is placed at the end of the friction torque transmission plate, and one end of the sensor is fixed to the tension and pressure sensor fixing block by bolts.

7. The high-temperature radial air bearing performance testing device according to claim 1, characterized in that: The stepper motor is placed at the center of the stepper motor horizontal mounting plate, with the motor end facing downward.

8. The high-temperature radial air bearing performance testing device according to claim 1, characterized in that: It also includes heat insulation material, which is installed at the connection between the stepping motor transmission rod and the tension and pressure sensor and at the connection between the friction torque transmission plate and the tension and pressure sensor through bolts.

9. The high-temperature radial air bearing performance testing device according to claim 1, characterized in that: The thickness of the thermal insulation cotton is not less than 5 mm.

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