Radial air bearing testing device for air suspension centrifugal fan

Abstract

The utility model relates to the field of mechanical equipment, in particular to a radial air bearing testing device for an air suspension centrifugal fan, which comprises a rack and a positioning tool for mounting a radial air bearing, the positioning tool is mounted on the rack in an up-down sliding manner, and a testing host for driving a testing rotor to rotate is mounted on the rack. The test rotor extends into the radial air bearing, the rack is provided with a driving device for driving the positioning tool to move up and down, the driving device comprises a linear motor which is arranged on the rack and is used for pulling the positioning tool to slide up and down, and the rack is provided with a pulling force detection device for detecting the pulling force of the linear motor. According to the testing device, a complete testing environment can be provided, the whole fan does not need to be disassembled and verified during testing, only the radial bearing and the bearing testing tool matched with the radial bearing are installed and disassembled, the working efficiency is effectively improved, the labor cost is reduced, and abrasion of other parts of the fan caused by frequent assembly is avoided.

Description

Technical Field

[0001] The utility model relates to the field of mechanical equipment, in particular to a radial air bearing testing device for an air suspension centrifugal fan. Background Art

[0002] Radial air bearings are important components of air suspension centrifugal fans. Unlike traditional ball bearings, radial air bearings have no physical contact points between the rotating shaft and the bearing during operation, so no lubrication is required, energy loss is extremely low, and efficiency is extremely high. They are suitable for a variety of working environments. Before starting, there is physical contact between the rotor and the bearing. During startup, the rotor and the bearing move relative to each other to form a fluid dynamic field. This fluid dynamics creates buoyancy in the radial air bearing.

[0003] Radial air bearing components are highly precise and assembly tests are complex. The entire machine must be assembled and powered on for a test run before test data can be obtained to determine whether the product is qualified. If the product production volume is large, when determining whether the product is qualified, the entire machine needs to be frequently disassembled and assembled just to test a single component. The test efficiency is extremely low, the test labor cost is high, and the frequent disassembly and assembly of the entire machine causes serious wear of other components, affecting the accuracy of the components and making it impossible to guarantee the overall performance of the product.

[0004] In order to improve the efficiency of radial air bearing detection and verification and reduce verification costs, this case designed and developed a fan radial air bearing test system to overcome the problems in the above-mentioned background technology. Utility Model Content

[0005] The purpose of the utility model is to provide an air suspension centrifugal fan radial air bearing testing device that does not require disassembly of the entire device and has high testing efficiency in order to solve the above problems.

[0006] To achieve the above-mentioned purpose, the utility model discloses a radial air bearing test device for an air-suspended centrifugal fan, the structural features of which are: it includes a frame and a positioning tool for installing a radial air bearing, the positioning tool is slidably installed on the frame, a test host for driving a test rotor to rotate is installed on the frame, the test rotor extends into the radial air bearing, and the frame is equipped with a drive device for driving the positioning tool to move up and down.

[0007] This device can simulate the operating state of the fan rotor when the fan is powered on by controlling the main engine speed, thereby monitoring the temperature and wear of the radial bearing cavity within several required time periods. During testing, there is no need to disassemble the entire fan for verification. Only the radial bearing and its matching bearing test fixture need to be installed and disassembled, effectively improving work efficiency, reducing labor costs, and avoiding wear of other fan components caused by frequent assembly. This device can provide a complete test environment for testing radial air bearings and simulate various conditions in actual operation to ensure the accuracy and reliability of the test.

[0008] The drive mechanism consists of a linear motor mounted on a frame, which pulls the positioning fixture up and down. A tension detection device is also mounted on the frame to measure the linear motor's pulling force. The combination of the tension detection device and the linear motor precisely controls the buoyancy of the positioning fixture under the influence of the air flow, thereby evaluating the performance of the radial air bearing.

[0009] The linear motor's power output is connected to a connecting rope used to pull the positioning fixture. A tension detection device is mounted on the positioning fixture, and the other end of the connecting rope is connected to the tension detection device. The linear motor pulls the tension detection device via the connecting rope, facilitating optimal placement of the linear motor.

[0010] Two pulleys are installed on the frame, corresponding to the connecting rope. The connecting rope consists of a first vertical section, a second vertical section, and a connecting section. The connecting section is connected to the upper ends of the first and second vertical sections. The two pulleys are located at the junctions of the connecting section with the first and second vertical sections, respectively. The pulleys not only guide the direction of the connecting rope but also reduce friction and resistance, thereby improving measurement accuracy.

[0011] The tensile force testing device includes a dynamometer, a digital dynamometer mounted on the frame to display the force readings, and a water-cooling unit mounted on the frame to cool the test machine. In addition to the dynamometer, the tensile force testing device can also be a tensile force sensor. The tensile force testing device can display the force reading directly or more intuitively via a digital dynamometer, facilitating data observation and recording. The water-cooling unit ensures the stability and reliability of the test machine during extended operation.

[0012] The frame is mounted on a base, and the positioning fixture slides up and down on the base. The base provides stable support for the positioning fixture, while the sliding connection ensures that the positioning fixture can be flexibly adjusted to suit different testing requirements.

[0013] The positioning fixture is provided with a positioning hole, and the radial air bearing is inserted into the positioning hole. Providing the positioning hole in the positioning fixture can ensure that the radial air bearing can be accurately and stably installed in the positioning fixture.

[0014] The inner wall of the positioning hole is provided with a retaining edge, against which the radial air bearing rests. The positioning fixture includes a bolt that passes through the radial air bearing and is screwed onto the retaining edge. The retaining edge and bolt provide additional fixation and support, preventing the bearing from shaking or shifting during operation.

[0015] The test host consists of a housing housing a motor stator, which houses the host rotor, which drives the test rotor. The test rotor is connected to the host rotor, with the left and right ends of the host rotor extending out of the motor stator. Positioning fixtures for the motor stator are located on both sides of the test host. The test host simulates the rotational conditions of actual operation, precisely driving and controlling the test rotor to evaluate the performance of the radial air bearing under rotation.

[0016] It also includes a temperature detection device for testing the temperature of the radial air bearing cavity, as well as a temperature sensor, pressure sensor, and vibration sensor for detecting the temperature, pressure, and vibration parameters of the equipment during operation. During the test of the stable operation of the rotor, the temperature of the radial bearing cavity is tested at multiple required time periods. The test area and location must be consistent. After the temperature reaches a certain limit, it will no longer rise and will instead decrease until it stabilizes and passes the test. If the temperature, pressure, or vibration parameters exceed the set parameters during operation, an early warning will be provided to the test personnel, and the test host will be stopped.

[0017] To sum up, the beneficial effects of the present invention are: the present device can provide a complete testing environment for testing radial air bearings, and simulate various conditions in actual operation, so as to monitor the temperature and wear of the radial bearing inner cavity in several required time periods. During the test, there is no need to disassemble the entire fan for verification, and only the radial bearing and the bearing test tooling that matches it need to be installed and disassembled, thereby effectively improving work efficiency, reducing labor costs, and avoiding wear of other parts of the fan due to frequent assembly, thereby ensuring the accuracy and reliability of the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural diagram of the utility model;

[0019] Figure 2 It is a schematic diagram of the cross-section structure of the positioning tooling and the test host;

[0020] Figure 3 for Figure 2 A schematic diagram of the partially enlarged structure of point A;

[0021] Figure 4 Schematic diagram of the axial structure of the positioning tooling and test host.

[0022] In the figure: frame 1, linear motor 2, positioning tool 3, test host 4, digital dynamometer 5, tension detection device 6, connecting rope 7, pulley 8, water cooling unit 9, radial air bearing 10, test rotor 11, host rotor 12, motor stator 13, housing 14, base 15, positioning hole 16, bolt 17, and retaining edge 18. DETAILED DESCRIPTION

[0023] The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0024] In the description of this application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0025] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout this application, unless otherwise specified, "plurality" means two or more.

[0026] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0027] The following is a description of preferred embodiments of the present invention with reference to the accompanying drawings.

[0028] Refer to the attached Figure 1The test device mainly includes a frame 1 and a series of supporting components. The frame 1 serves as the basis of the entire device and carries all other components. Among them, the positioning tool 3 is a key component for installing the radial air bearing 10. It can be installed on the frame 1 to slide up and down to meet different test requirements. The test host 4 is installed on the frame 1, and its main function is to drive the test rotor 11 to rotate. The test rotor 11 will extend into the radial air bearing 10, thereby simulating the operating state of the rotor when the fan is powered on. In order to drive the positioning tool 3 to move up and down, a driving device is also installed on the frame 1. The driving device includes a linear motor 2 installed on the frame 1 for pulling the positioning tool 3 to slide up and down. The linear motor 2 cooperates with the tension detection device 6 to accurately control the buoyancy of the positioning tool 3 under the air fluid, thereby evaluating the performance of the radial air bearing 10.

[0029] Refer to the attached Figure 1 , Attachment Figure 4 The tension detection device 6 is connected to the positioning fixture 3 through a connecting rope 7. The linear motor 2 pulls the tension detection device 6, thereby driving the positioning fixture 3 to move up and down. In order to guide the direction of the connecting rope 7 and reduce friction and resistance, a pulley 8 is also installed on the frame 1. In addition, the frame 1 is also equipped with a digital dynamometer 5, which is used to intuitively display the value of the tension detection device 6, making it easy to observe and record data. At the same time, in order to ensure the stability and reliability of the test host 4 during long-term operation, a water cooling unit 9 is also installed on the frame 1. Refer to the attached Figure 3 The interior of the positioning fixture 3 is provided with a positioning hole 16 for inserting the radial air bearing 10. The inner wall of the positioning hole 16 is provided with a retaining edge 18 and a bolt 17 to ensure that the bearing can be accurately and stably installed in the positioning fixture 3 to prevent it from shaking and displacement during operation.

[0030] Refer to the attached Figure 2 The test host 4 includes components such as a housing 14, a motor stator 13 and a host rotor 12. The host rotor 12 can drive the test rotor 11 to rotate, thereby simulating the rotation conditions in actual operation. In order to comprehensively evaluate the performance of the radial air bearing 10, the test device is also equipped with a temperature detection device and monitoring equipment such as temperature sensors, pressure sensors and vibration sensors. These devices can test the inner cavity temperature of the radial bearing in multiple required time periods during the stable operation of the test rotor 11, and monitor the temperature, pressure and vibration parameters of the equipment during operation. If the parameters exceed the set range, the tester will receive an early warning and can stop the test host 4 from running.

[0031] Before starting the test, the radial air bearing 10 to be tested needs to be installed on the positioning fixture 3 using bolts 17. At this time, the radial air bearing 10 is inside and the positioning fixture 3 is outside. After installation, the whole is inserted into the rotors at both ends of the test host 4 and adjusted to the correct position. The tension detection device is connected using a connecting rope 7, and the pressure is reset to zero. Then the test host 4 is turned on and the water cooling unit 9 is turned on to cool the test host 4. The host speed is adjusted using a frequency conversion control system to simulate the rotor operation state. During the stable operation of the rotor, the inner cavity temperature of the radial air bearing 10 is tested in the required multiple different time periods. The test area and position need to be consistent. After the temperature reaches a certain limit, it no longer rises and turns to decrease until it stabilizes and is qualified. After determining that the product is preliminarily qualified, the test host 4 is stopped from rotating, and the radial air bearing 10 is removed after cooling. After cleaning the surface of the radial air bearing 10, the wear condition of the bearing cavity is checked. If it meets the technical requirements, it is a qualified product. The air suspension centrifugal fan radial air bearing test device provides a complete test environment for testing the radial air bearing 10 and simulates various conditions in actual operation. Its reasonable design and comprehensive functions can ensure the accuracy and reliability of testing, effectively improve work efficiency and reduce labor costs.

[0032] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and replacements can be made without departing from the technical principles of the present invention. These improvements and replacements should also be regarded as the scope of protection of the present invention.

Claims

1. A radial air bearing test device for an air-suspended centrifugal fan, comprising a frame (1), characterized in that: The invention also includes a positioning fixture (3) for installing a radial air bearing (10), the positioning fixture (3) is slidably installed on the frame (1) up and down, a test host (4) for driving a test rotor (11) to rotate is installed on the frame (1), the test rotor (11) extends into the radial air bearing (10), and the frame (1) is installed with a driving device for driving the positioning fixture (3) to move up and down.

2. The radial air bearing testing device for an air-suspended centrifugal fan according to claim 1, wherein: The driving device comprises a linear motor (2) mounted on a frame (1) for pulling the positioning tool (3) to slide up and down, and a tension detection device (6) for detecting the pulling force of the linear motor (2) is mounted on the frame (1).

3. The radial air bearing testing device for an air-suspended centrifugal fan according to claim 2, wherein: The power output end of the linear motor (2) is connected to a connecting rope (7) for pulling the positioning tool (3); the tension detection device (6) is installed on the positioning tool (3); and the other end of the connecting rope (7) is connected to the tension detection device (6).

4. The radial air bearing testing device for an air-suspended centrifugal fan according to claim 3, characterized in that: The frame (1) is provided with two pulleys (8) corresponding to the connecting rope (7). The connecting rope (7) includes a first vertical section, a second vertical section, and a connecting section. The connecting section is connected to the upper ends of the first vertical section and the second vertical section. The two pulleys (8) are respectively located at the connection between the connecting section and the first vertical section and at the connection between the connecting section and the second vertical section.

5. The radial air bearing testing device for an air-suspended centrifugal fan according to claim 2, wherein: The tension detection device (6) includes a tension meter, a digital display dynamometer (5) for displaying the value of the tension detection device (6) is installed on the frame (1), and a water cooling unit (9) for cooling the test host (4) is installed on the frame (1).

6. The radial air bearing testing device for an air-suspended centrifugal fan according to claim 1, wherein: A base (15) is mounted on the frame (1), and the positioning tool (3) is mounted on the base (15) in a manner that it slides up and down.

7. The radial air bearing testing device for an air-suspended centrifugal fan according to claim 1, wherein: A positioning hole (16) is provided in the positioning fixture (3), and the radial air bearing (10) is inserted into the positioning hole (16).

8. The radial air bearing testing device for an air-suspended centrifugal fan according to claim 7, wherein: A retaining edge (18) is provided on the inner wall of the positioning hole (16), the radial air bearing (10) is pressed against the retaining edge (18), and a bolt (17) passing through the radial air bearing (10) and screwed onto the retaining edge (18) is installed in the positioning fixture (3).

9. The radial air bearing testing device for an air-suspended centrifugal fan according to claim 1, wherein: The test host (4) includes a housing (14), a motor stator (13) is installed in the housing (14), a host rotor (12) for driving the test rotor (11) to rotate is installed in the motor stator (13), the test rotor (11) is connected to the host rotor (12), and the left and right ends of the host rotor (12) protrude from the motor stator (13), and positioning tooling (3) for matching the motor stator (13) is provided on both the left and right sides of the test host (4).

10. The radial air bearing testing device for an air-suspended centrifugal fan according to claim 1, wherein: It also includes a temperature detection device for testing the temperature of the inner cavity of the radial air bearing (10), and a temperature sensor, a pressure sensor and a vibration sensor for respectively detecting the temperature, pressure and vibration parameters of the device when the device is running.

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