A bearing assembly oil storage structure testing machine

Abstract

The utility model relates to bearing test technical field, concretely relates to a kind of oil storage structure testing machine for bearing assembly. Including rack, temperature sensor, heating wire, vacuum cover;The rotor of test motor is fixed with mounting shaft by bolt;Oil reservoir is set on mounting shaft;One end of mounting shaft is equipped with temperature measuring hole;Temperature sensor is fixed on riser;The end of temperature sensor with temperature measuring point is inserted into temperature measuring hole;Make temperature measuring point and oil reservoir as close as possible, ensure that the temperature of oil reservoir and the temperature at temperature measuring point are consistent, facilitate temperature control. At the same time, temperature sensor is convenient to dismount, can be identified regularly, ensure the reliability of temperature measurement.

Description

Technical Field

[0001] This utility model relates to the field of bearing testing technology, specifically to a testing machine for an oil storage structure of bearing components. Background Technology

[0002] The bearing assembly is the core of rotating components and is crucial for the long lifespan of control torque gyroscopes and flywheels in space actuators, directly determining the product's lifespan. The lifespan of the bearing assembly depends on the bearing's operational performance and the lubrication system's performance. Especially for long-life products, to ensure adequate lubrication, an oil reservoir is installed in the bearing assembly to provide continuous, minute-by-minute oil supply. However, the oil supply cannot be too much, as this increases the bearing's frictional torque and fluctuations, affecting control accuracy; nor can it be too little, resulting in insufficient lubrication. Therefore, the long-term, stable, and reliable oil supply of the bearing assembly's oil reservoir is a critical factor in the overall product lifespan, making its performance testing and evaluation essential.

[0003] In existing technologies, such as the Chinese patent with publication number CN215178614U entitled "A Test Device for the Oil Supply Rate of a Bearing Assembly Oil Reservoir," the disclosed technical solution describes a method that uses a vacuum mechanism to simulate a vacuum environment. A test motor drives a locking nut fixed to its output shaft to rotate at a specified speed, direction, and duration. The oil supply rate is then calculated based on the weight difference of the oil reservoir before and after the test in a vacuum environment. The oil reservoir is directly mounted on the output shaft of the test motor for testing. However, in actual use, as the bearing rotates, its temperature rises. Existing test devices cannot effectively heat the oil reservoir under test in a vacuum environment to simulate actual working conditions, thus limiting the test results. Utility Model Content

[0004] This invention provides a testing machine for an oil storage structure of bearing assemblies to solve the above-mentioned problems.

[0005] The present invention adopts the following technical solution: a bearing assembly oil storage structure testing machine, including a frame, a temperature sensor, a heating wire, and a vacuum hood; a worktable is horizontally arranged on the frame; a base plate is fixed on the worktable; two vertical plates are fixed on the base plate; a test motor is arranged between the two vertical plates; the test motor is fixed on one of the vertical plates.

[0006] The rotor axis of the test motor is set horizontally; a mounting shaft is fixed to the rotor of the test motor by bolts; the other end of the mounting shaft is rotatably mounted on a vertical plate away from the test motor via an auxiliary bearing; an oil reservoir is sleeved on the mounting shaft; the mounting shaft drives the oil reservoir to rotate.

[0007] A temperature measuring hole is provided at one end of the mounting shaft; the temperature sensor is fixed on the vertical plate, and the end of the temperature sensor with the measuring point extends into the measuring hole; the measuring point is made as close as possible to the oil reservoir to ensure that the temperature of the oil reservoir is consistent with the temperature at the measuring point, facilitating temperature control. At the same time, the temperature sensor is easy to install and remove, and can be periodically calibrated to ensure the reliability of temperature measurement.

[0008] The heating element is built into the base plate;

[0009] The vacuum chamber covers the outside of the two vertical plates; the vacuum chamber and the worktable are connected by a rubber damping pad, which isolates vibration and prevents heat from being transferred to the outside of the vacuum chamber; a vacuum suction assembly is provided below the vacuum chamber; the vacuum suction assembly includes a suction port and an inflation port; the suction port is connected to the vacuum pump inlet through an electromagnetic baffle valve; the inflation port is connected to an electromagnetic inflation valve.

[0010] Furthermore, the test motor is a DC brushless motor; the test motor uses a design scheme of coreless armature and permanent magnet motor. Non-magnetic insulating material is used as the supporting frame for the armature winding. The outer rotor consists of a magnetically conductive motor rotor and permanent magnets, employing a radial magnetic circuit structure with surface magnets. The position sensor uses a Hall integrated circuit, with the Hall devices placed within the air gap magnetic field to reliably detect the rotor's position. The stator adopts a coreless structure, eliminating iron loss and positioning torque. Using non-magnetic insulating material as the frame ensures the armature's stiffness and strength, and also facilitates armature manufacturing. The outer rotor uses a permanent magnet radial magnetic circuit structure, increasing rotational inertia, facilitating connection with the shaft system, and minimizing radial dimensions. Samarium cobalt rare-earth permanent magnet material is used to increase output while reducing volume and weight. Through reasonable magnetic circuit design, a magnet pole arc coefficient of less than 1 is selected to reduce the motor's weight. The stator winding frame is fixed to the base, and the outer rotor is suspended on the shaft system. The position sensor uses sensitive Hall devices, with three Hall devices spaced 120 degrees apart and placed within the magnetic field. High-precision positioning holes are milled into the stator frame, and the Hall effect devices are directly mounted on the stator frame. Through electromagnetic field calculations, the sensor can accurately detect the rotor position. Rotor core machining: Low-carbon steel with good magnetic permeability is used, machined to coordinate dimensions and tolerances, and the surface is blackened for corrosion protection. Magnet fixing: The rotor magnets and wheel body are bonded together using an adhesive process. Because the magnets experience significant centrifugal force during rotation, and the attraction force on the inner ring of the rotor is relatively smaller than that on the outer ring, this process meets the requirements of this application. Winding manufacturing: The space, number of turns, and wire gauge for winding installation are determined through structural design. During winding fabrication, a wire mold is pre-made, followed by winding a three-phase shaped coil that conforms to the installation dimensions and number of turns. The wound three-phase shaped coil is then assembled onto the stator frame using an adhesive process. Finally, the winding leads and sensor leads are welded to complete the assembly. Winding frame manufacturing: Machining is performed to coordinate dimensions and tolerances, and the space for the windings and sensor is machined using high-precision indexing equipment.

[0011] Furthermore, the auxiliary bearing is a constant pressure preload deep groove ball bearing, which is fixedly connected to the vertical plate by bolts for easy disassembly.

[0012] Furthermore, the temperature sensor uses a PT100 resistance temperature detector (RTD), which features high measurement accuracy, stable performance, and strong anti-interference capability.

[0013] Furthermore, the electromagnetic baffle valve adopts the GDC-J16B type, which has the advantages of smooth operation, small size, reliable use, good sealing performance and long service life.

[0014] Furthermore, a rotary vane vacuum pump is selected; the rotary vane vacuum pump adopts a two-stage gas ballast design, which is more convenient for different processes to meet the requirements of steam discharge. The automatic anti-backflow valve design more reliably protects the vacuum system from oil contamination after shutdown. The built-in gear pump and constant pressure oil supply mechanism force oil supply, which can operate stably and reliably even under high suction pressure. It has fewer parts, good repeatability, and is easy to maintain and service.

[0015] Furthermore, the electromagnetic inflation valve adopts the GDC-Q3 model, which has the advantages of smooth operation, small size, reliable use, good sealing performance and long service life.

[0016] Furthermore, an oil mist filter is installed inside the vacuum chamber; the oil mist filter has a compact structure, filters oil vapors, reduces noise, and minimizes the harm of exhaust fumes to personnel. The oil mist filter is replaced regularly to ensure its filtration reliability.

[0017] The advantages are: the end of the temperature sensor with the temperature measuring point extends into the temperature measuring hole; this brings the measuring point as close as possible to the oil reservoir, ensuring that the temperature of the oil reservoir is consistent with the temperature at the measuring point, facilitating temperature control. At the same time, the temperature sensor is easy to install and remove, and can be periodically calibrated to ensure the reliability of temperature measurements. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of an embodiment of the oil storage structure testing machine for bearing assemblies according to the present invention;

[0020] Figure 2 This is a schematic diagram of an embodiment of the present invention without a vacuum cover installed;

[0021] Figure 3for Figure 2 Enlarged view of point A in the middle;

[0022] Figure 4 This is a cross-sectional view of an embodiment of the present utility model;

[0023] Figure 5 for Figure 4 Enlarged view of point B in the middle.

[0024] In the diagram: 100, oil reservoir; 200, worktable; 210, base plate; 220, vertical plate; 300, test motor; 310, mounting shaft; 311, temperature measuring hole; 320, auxiliary bearing; 400, temperature sensor; 500, vacuum chamber. Detailed Implementation

[0025] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. All electrical components mentioned in this document are electrically connected to an external main controller and 220V AC mains power, and the main controller can be a conventionally known device such as a computer that provides control.

[0026] An embodiment of the oil reservoir structure testing machine for bearing assemblies according to this utility model is as follows: Figures 1 to 5As shown, the device includes a frame, a temperature sensor 400, a heating wire, and a vacuum chamber 500. A horizontal worktable 200 is mounted on the frame. A base plate 210 is fixed on the worktable 200. Two vertical plates 220 are fixed on the base plate 210. A test motor 300 is positioned between the two vertical plates 220. The test motor 300 is fixed to one of the vertical plates 220. The test motor 300 is a DC brushless motor. The test motor 300 uses a coreless armature and permanent magnet motor design. Non-magnetic insulating material is used as the supporting frame for the armature winding. The outer rotor consists of a magnetically conductive motor rotor and permanent magnets, employing a radial magnetic circuit structure with surface magnets. The position sensor uses a Hall effect integrated circuit, with the Hall device placed within the air gap magnetic field to reliably detect the rotor's position. The stator uses a coreless structure, eliminating iron loss and positioning torque. Using non-magnetic insulating material as the frame ensures the armature's stiffness and strength, and also facilitates the armature manufacturing process. The rotor employs an external rotor permanent magnet radial magnetic circuit structure, which increases rotational inertia, facilitates connection with the shaft system, and has a small radial dimension. It utilizes samarium cobalt rare-earth permanent magnet material to increase output while reducing size and weight. Through rational magnetic circuit design, a magnet pole arc coefficient of less than 1 is selected to reduce the motor's weight. The stator winding frame is fixed to the base, and the external rotor is suspended on the shaft system. The position sensor uses sensitive Hall effect devices, with three Hall effect devices spaced 120 degrees apart and placed within the magnetic field. High-precision positioning holes are milled into the stator frame, and the Hall effect devices are directly mounted on the stator frame. Electromagnetic field calculations allow the sensor to accurately detect the rotor position. The rotor core is machined using low-carbon steel with good magnetic permeability, processed to coordinate dimensions and tolerances, and treated with a blackening anti-corrosion finish. The rotor magnets are fixed using an adhesive bonding process. During rotation, the magnets experience significant centrifugal force, while the attraction force on the magnets from the inner ring of the rotor is relatively smaller than that from the outer ring.

[0027] Therefore, this process meets the requirements for this application. Winding manufacturing: The space, number of turns, and wire gauge for winding installation are determined through structural design. During winding fabrication, a wire mold is pre-made, followed by winding a coil conforming to the installation dimensions and number of turns. The wound three-phase coil is then assembled onto the stator frame using adhesive bonding. Finally, the welding of winding leads and sensor leads is completed. Winding frame manufacturing: The winding frame is machined according to coordinated dimensions and tolerances, using high-precision indexing equipment to machine the space for the winding and sensor placement.

[0028] The rotor axis of the test motor 300 is set horizontally; a mounting shaft 310 is fixed to the rotor of the test motor 300 by bolts; the other end of the mounting shaft 310 is rotatably mounted on a vertical plate 220 away from the test motor 300 via an auxiliary bearing 320; an oil reservoir 100 is sleeved on the mounting shaft 310; the mounting shaft 310 drives the oil reservoir 100 to rotate; the auxiliary bearing 320 is a constant pressure preload deep groove ball bearing, which is fixedly connected to the vertical plate 220 by bolts for easy disassembly;

[0029] One end of the mounting shaft 310 is provided with a temperature measuring hole 311; the temperature sensor 400 adopts a PT100 resistance temperature detector (RTD), which features high measurement accuracy, stable performance, and strong anti-interference ability; the temperature sensor 400 is fixed on the vertical plate 220, and the end of the temperature sensor 400 with the temperature measuring point extends into the temperature measuring hole 311; the temperature measuring point is made as close as possible to the oil reservoir 100 to ensure that the temperature of the oil reservoir 100 is consistent with the temperature at the measuring point, facilitating temperature control. At the same time, the temperature sensor 400 is easy to install and remove, and can be periodically calibrated to ensure the reliability of temperature measurement;

[0030] The heating wire is built into the base plate 210; the heating wire evenly heats the rotating oil reservoir 100.

[0031] The vacuum chamber 500 covers the outside of the two vertical plates 220; the vacuum chamber 500 and the worktable 200 are connected by a rubber damping pad, which isolates vibration and prevents heat transfer to the outside of the vacuum chamber 500; a vacuum suction assembly is located below the vacuum chamber 500; the vacuum suction assembly includes a suction port and an inflation port; the suction port is connected to the vacuum pump inlet via an electromagnetic baffle valve; the electromagnetic baffle valve is a GDC-J16B type, which has the advantages of quiet operation, small size, reliable use, good sealing performance and long service life; the vacuum pump is a rotary vane type; the rotary vane vacuum pump adopts a two-stage gas ballast design, which is more convenient for different processes. To meet steam discharge requirements, an automatic anti-backflow valve design reliably protects the vacuum system from oil contamination after shutdown. An integrated gear pump and constant-pressure oil supply mechanism force oil supply, ensuring stable and reliable operation even under high suction pressure. The system features fewer parts, high repeatability, and easy maintenance. An electromagnetic inflation valve (GDC-Q3 type) connects to the inflation port, offering advantages such as quiet operation, small size, reliable use, good sealing performance, and long service life. An oil mist filter is installed inside the 500mm vacuum chamber. This compact filter filters oil and gas, reduces noise, and minimizes the harm of exhaust gases to personnel. The oil mist filter should be replaced regularly to ensure its reliability.

[0032] Based on the above embodiments, the working principle and process of this utility model are as follows: The test motor 300 is started, driving the mounting shaft 310 to rotate the oil reservoir 100. A heating wire evenly heats the rotating oil reservoir 100. A vacuum pump expels air from the vacuum chamber 500 to create a vacuum. The end of the temperature sensor 400 with the temperature measuring point extends into the temperature measuring hole 311; the measuring point is positioned as close as possible to the oil reservoir 100 to ensure that the temperature of the oil reservoir 100 is consistent with the temperature at the measuring point, facilitating temperature control. Simultaneously, the temperature sensor 400 is easy to install and remove, and can be periodically calibrated to ensure the reliability of temperature measurement.

[0033] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A testing machine for an oil reservoir structure of a bearing assembly, characterized in that: The system includes a frame, temperature sensor, heating wire, and vacuum chamber; a horizontal worktable is mounted on the frame; a base plate is fixed on the worktable; two vertical plates are fixed on the base plate; a test motor is located between the two vertical plates; the test motor is fixed on one of the vertical plates. The rotor axis of the test motor is set horizontally; a mounting shaft is fixed to the rotor of the test motor by bolts; the other end of the mounting shaft is rotatably mounted on a vertical plate away from the test motor via an auxiliary bearing; an oil reservoir is fitted onto the mounting shaft. A temperature measuring hole is provided at one end of the mounting shaft; the temperature sensor is fixed on the vertical plate, and the end of the temperature sensor with the temperature measuring point extends into the temperature measuring hole. The heating element is built into the base plate; The vacuum chamber covers the outside of the two vertical plates; the vacuum chamber and the worktable are connected by a rubber damping pad; a vacuum suction assembly is provided below the vacuum chamber; the vacuum suction assembly includes a suction port and an inflation port; the suction port is connected to the vacuum pump inlet through an electromagnetic baffle valve; the inflation port is connected to an electromagnetic inflation valve.

2. The oil reservoir structure testing machine for bearing assemblies according to claim 1, characterized in that: The test motor was a DC brushless motor.

3. The oil reservoir structure testing machine for bearing assemblies according to claim 1, characterized in that: The auxiliary bearing is a constant pressure preload deep groove ball bearing, which is fixedly connected to the vertical plate by bolts.

4. The oil reservoir structure testing machine for bearing assemblies according to claim 1, characterized in that: The temperature sensor uses a PT100 resistance temperature detector (RTD).

5. The oil reservoir structure testing machine for bearing assemblies according to claim 1, characterized in that: The electromagnetic baffle valve is of type GDC-J16B.

6. The oil reservoir structure testing machine for bearing assemblies according to claim 2, characterized in that: The vacuum pump used is a rotary vane type.

7. A testing machine for an oil reservoir structure of a bearing assembly according to claim 2, characterized in that: The electromagnetic inflation valve is of type GDC-Q3.

8. The oil reservoir structure testing machine for bearing assemblies according to claim 2, characterized in that: An oil mist filter is installed inside the vacuum chamber.

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