Precise temperature control test bench based on performance test of telemetering device

Abstract

The invention discloses an accurate temperature control test bench based on a performance test of a telemetering device, and the test bench comprises a drive motor, a temperature adjustment unit, a cooling unit, the telemetering device, a distance adjustment unit, and a temperature monitoring and loading unit, and is compact in structure, simple in composition unit, and convenient to remanufacture and maintain; multi-state performance tests under different rotating speeds, temperatures and loads can be carried out, and the application range is wide; the distance adjusting unit can be used for testing the stability of the receiving unit and the data acquisition unit at different distances, so that the mounting requirements of different devices are met; the telemetering device is cooled according to the cooling unit, and the cooling requirements of the telemetering device in different test states are met; by means of the arrangement of the heat shield, it can be guaranteed that the temperature sensor is closest to the position of the heating wire, the influence of the heating wire on the temperature is avoided, most accurate temperature monitoring is achieved, continuous monitoring can be achieved, and the gas temperature can be accurately monitored without influencing the monitoring accuracy.

Description

Technical Field

[0001] The invention belongs to the technical field of telemetry device testing, and in particular relates to a precise temperature control test bench based on telemetry device performance testing. Background Art

[0002] Rotational motion is a common form of motion in mechanical equipment and is widely used in aircraft, vehicles, ships and other equipment. In order to monitor the performance of the rotating parts during the motion process, slip ring equipment and telemetry devices are usually used to complete the transmission of test signals between the dynamic and static rotors. The slip ring equipment has structural limitations during the test process. At this time, telemetry equipment is generally used to perform performance tests on the rotating structure. In order to ensure the stability of signal acquisition and transmission during the test, the performance of the telemetry device is tested and verified. For this purpose, a multifunctional performance test bench with simple structure and easy operation is designed. The test bench can not only complete the performance test of the telemetry device with different installation spacings during the rotational motion, but also verify the stability of the telemetry device under different working conditions such as temperature, load, and oil. Conventional temperature sensors near the heating unit affect the long-term monitoring accuracy. Summary of the invention

[0003] The object of the present invention is to provide a precise temperature control test bench based on remote sensing device performance testing to solve the above-mentioned problems.

[0004] To achieve the above-mentioned object, the present invention provides the following technical solutions: a precision temperature control test bench based on telemetry device performance testing, comprising a drive motor, a temperature adjustment unit, a cooling unit, a telemetry device, a distance adjustment unit, a temperature monitoring and loading unit;

[0005] The test gearbox includes a box body, a drive shaft, and a test rotating part. The drive shaft is connected to the drive motor through a coupling. The temperature control unit is installed on the side of the box body, and uses a one-way fan to send the heated and cooled gas into the test gearbox, and automatically adjusts the air supply temperature according to the temperature feedback from the temperature sensor designed at the outlet of the temperature control unit. The telemetry device includes a data acquisition unit and a receiving unit. The data acquisition unit is installed on the drive shaft through a connecting tool, and the receiving unit is installed on the follower plate of the pitch adjustment unit. The signal of the receiving unit is transmitted to an external host computer through a signal line. The pitch adjustment unit uses a pulse motor to control the gear rack structure to adjust the distance between the data acquisition unit and the receiving unit.

[0006] Preferably, a unidirectional fan is installed between the cooling section and the heating section in the temperature control unit, the cooling section is the air inlet, the heating section is the air outlet, and the heating section adopts a spiral structure. A temperature sensor is installed at the air outlet of the temperature control unit to monitor the air outlet temperature. When the temperature control unit is working, the unidirectional fan is first started, and then the cooling section or the heating section is selected to work according to demand. The feedback signal of the temperature sensor at the air outlet is used to perform automatic adjustment to achieve temperature control stability of the temperature control unit.

[0007] Preferably, the temperature control unit comprises two pipes, an arc-shaped shell is fixed between the two pipes and the two arc-shaped shells are installed and connected to each other, a heating wire used in the heating section of the temperature control unit is installed in one of the pipes, a mounting frame is fixedly connected to the inner side of one of the arc-shaped shells, one end of the mounting frame extends to the center of the combination of the two arc-shaped shells and is fixed with a heat insulation cover, a temperature sensor is arranged inside the heat insulation cover and the temperature sensor is fixedly connected to the mounting frame through an extension frame, and a through hole is opened on the heat insulation cover and is in the same straight line as the temperature sensor.

[0008] Preferably, the temperature regulating unit is connected to the side wall of the test gear box through an elbow, the bending angle of the elbow is between 45° and 90°, and the length of the inclined section of the elbow is more than times that of the horizontal section.

[0009] Preferably, the cooling unit adopts an independent structural structure, consisting of two parts, namely a cooling module and a heating module, wherein the cooling module is connected to the oil return port in the test gear box, and the heat brought out of the telemetry equipment is cooled in the cooling module. The cooled coolant flows unidirectionally to the heating module, and after being heated to the set temperature, an oil pump is used to spray the telemetry device in the test gear box. In this process, a temperature sensor is used to monitor the temperature in the heating module, and the flow rate and flow of the injection oil are monitored according to the flowmeter, and the cooling unit is controlled according to the feedback result.

[0010] Preferably, the follower plate in the distance adjusting unit is opposite to the driving shaft in the test gear box, and the two are arranged concentrically. The receiving unit of the telemetry device is installed on the side of the follower plate away from the inner wall, and the telescopic structure of the distance adjusting unit is connected to the telescopic structure of the distance adjusting unit. The telescopic structure is driven by a pulse motor to drive the rack and pinion structure to move.

[0011] Preferably, the telemetering device is connected to the drive shaft by a tooling, and when replacing a different type of telemetering device, it is only necessary to move the follower plate in the distance adjustment unit away from the drive shaft and then replace the connecting tooling and the corresponding telemetering device.

[0012] The technical effects and advantages of the present invention are as follows: 1. The test bench has a compact structure and simple components, which is convenient for modification and maintenance; it can carry out multi-state performance tests under different speeds, temperatures, and loads, and has a wide range of applications; the distance adjustment unit can be used to complete the stability test of the receiving unit and the data acquisition unit at different distances, meeting the installation requirements in different equipment; the telemetry device is cooled down according to the cooling unit to meet the cooling requirements of the telemetry device under different test conditions;

[0013] 2. The use of the heat insulation cover can ensure that the temperature sensor is closest to the heating wire to avoid the influence of the heating wire itself on the temperature, achieve the most accurate temperature monitoring and continuous monitoring, and accurately monitor the gas temperature without affecting the monitoring accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the overall structure of the multifunctional test bench for testing the performance of a telemetry device of the present invention;

[0015] Figure 2 It is a schematic diagram of the structure of the temperature regulating unit of the present invention;

[0016] Figure 3 It is a schematic diagram of the cooling unit structure of the present invention;

[0017] Figure 4 A three-dimensional diagram of the temperature control unit pipeline of the present invention;

[0018] Figure 5 It is an exploded view of the temperature control unit pipeline of the present invention.

[0019] In the figure: 1. driving motor; 2. temperature control unit; 3. cooling unit; 4. telemetry device; 5. distance adjustment unit; 6. temperature monitoring; 7. loading unit; 8. coupling; 9. driving shaft; 10. pipeline; 11. arc-shaped shell; 12. heating wire; 13. mounting frame; 14. extension frame; 15. temperature sensor; 16. heat shield. DETAILED DESCRIPTION

[0020] The following will be combined with 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, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] The present invention provides Figure 1-5 A precise temperature control test bench based on telemetry device performance testing is shown in FIG.

[0022] The temperature control unit 2 is installed on the side of the box body, and uses a one-way fan to send the heated gas into the test gear box, so that the ambient temperature in the test gear box reaches 250°C. The temperature sensor at the outlet of the temperature control unit 2 monitors the temperature of the air inlet of the test gear box and automatically adjusts it. Figure 2 As shown, a dynamic balance of intake air temperature is achieved.

[0023] The cooling medium in cooling unit 3 is high temperature gear oil. Figure 3 The temperature regulating unit 2 of the middle cooling unit is heated up, and when the temperature reaches 45±5°C, the gear oil is sprayed onto the surface of the telemetry device 4 by means of a cooling pipe, simulating the operating stability of the telemetry device 4 in a high temperature environment.

[0024] The gear rack in the distance adjustment unit 5 drives the telescopic structure to move under the control of the pulse motor, adjusts the distance between the data acquisition unit and the receiving unit, and realizes the stability of the test operation of the telemetry device 4 under different distances.

[0025] The temperature at the exhaust port of the gearbox is monitored. When the temperature at the exhaust port reaches 250°C, the ambient temperature inside the test gearbox is kept constant to simulate the ambient temperature when the test rotating parts are running.

[0026] The loading unit is controlled by a fan, and the operating torque of the test rotating part reaches 30N·m and remains constant.

[0027] During the test, the cooling unit 3 starts working. When the temperature of the coolant reaches the set value, the temperature regulating unit 2 starts working. When the temperature of the exhaust port reaches 250°C, the loading unit 7 starts running.

[0028] The preferred test gearbox has a drive shaft speed of 8000 rpm, an ambient temperature of 250°C, a cooling medium of high-temperature gear oil, an operating torque of 30 N·m, and an installation spacing of 3 mm between the data acquisition unit and the receiving unit of the telemetry device. The test bench has a compact structure and simple component units, which are convenient for modification and maintenance. It can carry out multi-state performance tests under different speeds, temperatures, and loads, and has a wide range of applications. The adjustable spacing unit can be used to complete stability tests at different spacings between the receiving unit and the data acquisition unit to meet installation requirements in different equipment. The telemetry device is cooled down according to the cooling unit to meet the cooling requirements of the telemetry device under different test conditions.

[0029] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A precision temperature control test bench based on remote sensing device performance testing, comprising a drive motor (1), characterized in that: It also includes a temperature adjustment unit (2), a cooling unit (3), a telemetry device (4), a distance adjustment unit (5), a temperature monitoring unit (6) and a loading unit (7); The test gearbox comprises a housing, a drive shaft (9), and a test rotating part, wherein the drive shaft is connected to a drive motor via a coupling (8); the temperature control unit (2) is installed on the side of the housing, and uses a one-way fan to deliver heated and cooled gas into the test gearbox, and automatically adjusts the air supply temperature according to the temperature feedback from a temperature sensor designed at the outlet of the temperature control unit (2); the telemetry device (4) comprises a data acquisition unit and a receiving unit, wherein the data acquisition unit is installed on the drive shaft via a connecting tool, and the receiving unit is installed on a follower plate of a pitch adjustment unit (5), and the signal of the receiving unit is transmitted to an external host computer via a signal line; the pitch adjustment unit (5) uses a pulse motor to control a gear rack structure to adjust the distance between the data acquisition unit and the receiving unit.

2. According to claim 1, a precise temperature control test bench based on remote sensing device performance test is characterized in that: A unidirectional fan is installed between the cooling section and the heating section in the temperature control unit (2); the cooling section is an air inlet, and the heating section is an air outlet. The heating section adopts a spiral structure. A temperature sensor is installed at the air outlet of the temperature control unit (2) to monitor the air outlet temperature. When the temperature control unit (2) is working, the unidirectional fan is first started, and then the cooling section or the heating section is selected to work according to demand. The feedback signal of the temperature sensor at the air outlet is used to perform automatic adjustment to achieve temperature control stability of the temperature control unit (2).

3. According to claim 2, a precise temperature control test bench based on remote sensing device performance testing is characterized in that: The temperature control unit (2) comprises two pipes (10), an arc-shaped shell (11) is fixed between the two pipes (10) and the two arc-shaped shells (11) are installed and connected to each other, a heating wire (12) used in the heating section of the temperature control unit (2) is installed in one of the pipes (10), a mounting frame (13) is fixedly connected to the inner side of one of the arc-shaped shells (11), one end of the mounting frame (13) extends to the center of the circle of the combination of the two arc-shaped shells (11) and is fixed with a heat insulation cover (16), a temperature sensor (15) is arranged inside the heat insulation cover (16) and the temperature sensor (15) is fixedly connected to the mounting frame (13) through an extension frame (14), and a through hole is opened on the heat insulation cover (16) and is on the same straight line as the temperature sensor (15).

4. According to claim 1, a precise temperature control test bench based on remote sensing device performance testing is characterized in that: The temperature regulating unit (2) is connected to the side wall of the test gear box through an elbow, the angle of the elbow is between 45° and 90°, and the length of the inclined section of the elbow is more than twice that of the horizontal section.

5. According to claim 1, a precise temperature control test bench based on remote sensing device performance testing is characterized in that: The cooling unit (3) adopts an independent structure, and is composed of two parts, namely a cooling module and a heating module. The cooling module is connected to the oil return port in the test gear box, and the heat brought out of the telemetry device (4) is cooled in the cooling module. The cooled coolant flows unidirectionally to the heating module, and after being heated to a set temperature, an oil pump is used to spray the telemetry device in the test gear box. In this process, a temperature sensor is used to monitor the temperature in the heating module, and the flow rate and flow of the oil injection are monitored according to the flow meter, and the cooling unit (3) is controlled according to the feedback result.

6. According to claim 1, a precise temperature control test bench based on remote sensing device performance testing is characterized in that: The follower plate in the pitch adjustment unit (5) is opposite to the driving shaft in the test gear box, and the two are arranged concentrically. The receiving unit of the telemetry device is installed on the side of the follower plate away from the inner wall, and is connected to the telescopic structure of the pitch adjustment unit (5). The telescopic structure is driven by a pulse motor to drive the gear rack structure to move.

7. According to claim 1, a precise temperature control test bench based on remote sensing device performance testing is characterized in that: The telemetering device (4) is connected to the drive shaft by a tooling, and when replacing a telemetering device (4) of a different form, it is only necessary to move the follower plate in the pitch adjustment unit (5) away from the drive shaft and then replace the connecting tooling and the corresponding telemetering device (4).

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