A synchronous simulation test apparatus for multi-support loads of main bearings in near-service environment

Abstract

This invention discloses a multi-support load synchronous simulation main bearing tester for near-service environment, belonging to the field of aero-engine technology. The tester includes a first motor, a first speed-increasing gearbox, a second motor, a second speed-increasing gearbox, and a test bearing device. The test bearing device includes a mounting housing and an inner rotor, an outer rotor, a first support point, a second support point, a third support point, a fourth support point, and a fifth support point disposed within the mounting housing. The first motor drives the inner rotor to rotate via the first speed-increasing gearbox; the second motor drives the outer rotor to rotate via the second speed-increasing gearbox; the outer rotor is fitted onto the inner rotor; the first to fifth support points are arranged sequentially from left to right within the mounting housing, with the first, second, and fifth support points positioned on the inner rotor, the third support point on the outer rotor, and the fourth support point positioned between the inner and outer rotors. The beneficial effects are as follows: it can simultaneously test five bearings; and it expands the load simulation range of the bearing tester.

Description

Technical Field

[0001] This invention belongs to the field of aero-engine technology, specifically relating to a main bearing tester for synchronous simulation of multi-support loads in near-service environment. Background Technology

[0002] Aero engines are characterized by high speed, high temperature, and high speed, with rotor speeds significantly higher than those of industrial equipment; light aero engines typically exceed 30,000 rpm. Therefore, the performance of the main shaft bearing is a key factor affecting the safe and reliable operation of the engine, playing a crucial role in its operation. Main shaft bearings are single-point bearings, lacking redundancy and backup; a failure can have severe consequences, necessitating accurate prediction of their reliability. However, the complex operating conditions of main shaft bearings make reliability assessment difficult solely through theoretical and simulation methods. Therefore, reliability testing equipment for main shaft bearings is of great importance.

[0003] There are many existing bearing testing equipment, but it is difficult to test multiple bearings at the same time, and it is also impossible to simulate the bearing service conditions and environment. Summary of the Invention

[0004] The purpose of this invention is to provide a multi-support load synchronous simulation main bearing tester for near-service environment, which can meet the requirement of simultaneous testing of 5 bearings and can simulate bearing service conditions and environment, thereby solving at least one of the technical problems involved in the background art.

[0005] To solve the above-mentioned technical problems, the present invention is implemented as follows:

[0006] This invention provides a near-service environment multi-support load synchronous simulation main bearing tester, including a first motor, a first speed increaser, a second motor, a second speed increaser, and a test bearing device. The test bearing device includes a mounting housing and an inner rotor, an outer rotor, a first support point, a second support point, a third support point, a fourth support point, and a fifth support point disposed within the mounting housing. The first motor drives the inner rotor to rotate via the first speed increaser; the second motor drives the outer rotor to rotate via the second speed increaser; the outer rotor is sleeved on the inner rotor; the first to fifth support points are arranged sequentially from left to right within the mounting housing, with the first, second, and fifth support points disposed on the inner rotor, the third support point disposed on the outer rotor, and the fourth support point disposed between the inner and outer rotors.

[0007] Optionally, the test bearing device further includes a simulated central cone disposed within the mounting housing, through which the second speed increaser drives the outer rotor.

[0008] Optionally, the first fulcrum includes a first fulcrum housing and a first bearing bushing assembled within the first fulcrum housing and replaceable according to the size of the test bearing; the second fulcrum includes a second fulcrum housing and a second bearing bushing assembled within the second fulcrum housing and replaceable according to the size of the test bearing; the third fulcrum includes a third fulcrum housing and a third bearing bushing assembled within the third fulcrum housing and replaceable according to the size of the test bearing; the fourth fulcrum includes a fourth fulcrum housing and a fourth bearing bushing assembled within the fourth fulcrum housing and replaceable according to the size of the test bearing; and the fifth fulcrum includes a fifth fulcrum housing and a fifth bearing bushing assembled within the fifth fulcrum housing and replaceable according to the size of the test bearing.

[0009] Optionally, both the first speed increaser and the second speed increaser adopt a dual-output configuration.

[0010] Optionally, the system further includes a loading system for axial and radial loading. The loading system includes a first loading mechanism, a second loading mechanism, a third loading mechanism, and a fourth loading mechanism. The first loading mechanism is located between the first fulcrum and the second fulcrum and is used to apply radial loading to the inner rotor. The second loading mechanism is located between the third fulcrum and the fourth fulcrum and is used to apply radial and axial loading to the outer rotor. The third loading mechanism is located between the fourth fulcrum and the fifth fulcrum and is used to apply radial loading to the inner rotor. The fourth loading mechanism is located on the side of the fifth fulcrum away from the fourth fulcrum and is used to apply axial loading to the inner rotor.

[0011] Optionally, the loading system further includes a first hydraulic cylinder cooperating with the first loading mechanism, a second hydraulic cylinder cooperating with the second loading mechanism, a third hydraulic cylinder cooperating with the third loading mechanism, and a fourth hydraulic cylinder cooperating with the fourth loading mechanism.

[0012] Optionally, the test bearing device further includes three auxiliary bearings, which are respectively disposed between the first loading mechanism and the inner rotor, between the second loading mechanism and the outer rotor, and between the fourth loading mechanism and the inner rotor.

[0013] Optionally, it also includes a first low-speed coupling disposed between the first motor and the first speed increaser, a second low-speed coupling disposed between the second motor and the second speed increaser, a first high-speed coupling disposed between the first speed increaser and the inner rotor, and a second high-speed coupling disposed between the second speed increaser and the simulated central cone.

[0014] Optionally, it also includes a first torque and speed sensor disposed between the first speed increaser and the first high-speed coupling, and a second torque and speed sensor disposed between the second speed increaser and the second high-speed coupling.

[0015] Compared with the prior art, the present invention has the following advantages:

[0016] (1) The bearing bushing can be replaced according to the bearing model and size, which can meet the performance test, life test and application research test of the aero-engine bearing component level with a simulated bearing inner diameter of Φ30mm~Φ300mm. Moreover, only some parts need to be replaced to realize the simulation test of multiple bearings. It is highly operable and has a simple structure.

[0017] (2) The five-point support structure can meet the requirement of testing five bearings at the same time;

[0018] (3) The drive head is composed of a motor and a speed increaser, and is equipped with a speed and torque sensor. The speed increaser adopts a dual output form, which can adapt to constant torque output under two speed ranges, thus expanding the load simulation range of the bearing tester.

[0019] (4) By setting up a loading system, axial loading of 0-200kN and radial loading of 0-100kN can be achieved to simulate bearing service conditions and environment and meet loading requirements in different directions. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein:

[0021] Figure 1 A schematic diagram of the overall working principle of the near-service environment multi-support load synchronous simulation main bearing tester provided by the present invention;

[0022] Figure 2 A schematic diagram of the working principle of the test bearing device provided by the present invention;

[0023] Figure 3 A schematic diagram of the structure of the test bearing device provided by the present invention;

[0024] Figure 4 for Figure 3 Enlarged view of section A;

[0025] Figure 5 The circuit diagram of the loading system provided by the present invention. Detailed Implementation

[0026] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] Please see Figure 1 and Figure 2 As shown, this embodiment of the invention provides a multi-support load synchronous simulation main bearing tester for near-service environment, including a first motor 1, a first speed increaser 2, a second motor 3, a second speed increaser 4, a test bearing device 5, a test bearing 6, a first low-speed coupling 7, a second low-speed coupling 8, a first high-speed coupling 9, a second high-speed coupling 10, a first torque and speed sensor 11, and a second torque and speed sensor 12.

[0028] Both the first motor 1 and the second motor 3 are variable frequency motors.

[0029] Both the first speed increaser 2 and the second speed increaser 4 adopt a dual-output configuration, which can adapt to constant torque output under two speed ranges, thus expanding the load simulation range of the bearing tester.

[0030] The test bearing device 5 includes a mounting housing 50 and a simulated central cone 51, an inner rotor 52, an outer rotor 53, a first fulcrum 54, a second fulcrum 55, a third fulcrum 56, a fourth fulcrum 57, and a fifth fulcrum 58 disposed within the mounting housing 50.

[0031] The simulated central cone 51 is disposed inside the mounting housing 50, and the second speed increaser 4 drives the outer rotor 53 to rotate through the simulated central cone 51.

[0032] The outer rotor 53 is sleeved on the inner rotor 52; the first fulcrum 54 to the fifth fulcrum 58 are arranged sequentially from left to right inside the mounting housing 50, and the first fulcrum 54, the second fulcrum 55 and the fifth fulcrum 58 are arranged on the inner rotor 52, the third fulcrum 56 is arranged on the outer rotor 53, and the fourth fulcrum 57 is arranged between the inner rotor 52 and the outer rotor 53.

[0033] Furthermore, combined Figure 3 and Figure 4 As shown, the first fulcrum 54 includes a first fulcrum housing 541 and a first bearing bushing 542 assembled in the first fulcrum housing 541 and replaceable according to the size of the test bearing model. The first bearing bushing 542 is used to fix the test bearing 21 to be tested.

[0034] The second fulcrum 55 includes a second fulcrum housing 551 and a second bearing bushing (unnumbered) assembled in the second fulcrum housing 551 and replaceable according to the size of the test bearing model. The test bearing 21 to be tested is fixed in the second bearing bushing.

[0035] The third fulcrum 56 includes a third fulcrum housing 561 and a third bearing bushing (unnumbered) assembled in the third fulcrum housing 561 and replaceable according to the size of the test bearing model. The test bearing 21 to be tested is fixed in the third bearing bushing.

[0036] The fourth fulcrum 57 includes a fourth fulcrum housing 571 and a fourth bearing bushing (unnumbered) assembled in the fourth fulcrum housing 571 and replaceable according to the size of the test bearing model. The fourth bearing bushing is used to fix the test bearing 21 to be tested.

[0037] The fifth fulcrum 58 includes a fifth fulcrum housing 581 and a fifth bearing bushing (unnumbered) assembled in the fifth fulcrum housing 581 and replaceable according to the size of the test bearing model. The fifth bearing bushing is used to fix the test bearing 21 to be tested.

[0038] By setting five support points and replacing the bearing bushing according to the size of the test bearing, the requirement of testing five bearings simultaneously can be met, and performance testing, life testing and application research testing of aero-engine bearing components with inner diameters of Φ30mm to Φ300mm can be realized.

[0039] The first motor 1 drives the inner rotor 52 to rotate through the first speed increaser 2. The first low-speed coupling 7 is disposed between the first motor 1 and the first speed increaser 2. The first torque and speed sensor 11 is disposed between the first speed increaser 2 and the first high-speed coupling 9.

[0040] The second motor 3 drives the outer rotor 53 to rotate through the second speed increaser 4. The second low-speed coupling 8 is disposed between the second motor 3 and the second speed increaser 4. The second high-speed coupling 10 is disposed between the second speed increaser 4 and the simulated central cone 15. The second torque and speed sensor 12 is disposed between the second speed increaser 4 and the second high-speed coupling 10.

[0041] To simulate bearing service conditions and environment, the near-service environment multi-support load synchronous simulation main bearing tester provided by the present invention also includes a loading system for axial and radial loading, and a heating system for providing the required ambient temperature to the test bearing.

[0042] See details Figure 2As shown, the loading system includes a first loading mechanism 13, a second loading mechanism 14, a third loading mechanism 15, and a fourth loading mechanism 16. The first loading mechanism 13 is located between the first fulcrum 54 and the second fulcrum 55 and is used to radially load the inner rotor 52, generating a radial force F. r1 The second loading mechanism 14 is located between the third fulcrum 56 and the fourth fulcrum 57 and is used to apply radial and axial loading to the outer rotor 53, generating a radial force F. r2 Axial force F a1 and axial force F a2 The third loading mechanism 15 is located between the fourth fulcrum 57 and the fifth fulcrum 58 and is used to radially load the inner rotor 52, generating a radial force F. r3 The fourth loading mechanism 16 is located on the side of the fifth fulcrum 58 away from the fourth fulcrum 57 and is used to axially load the inner rotor 52, generating an axial force F. a3 .

[0043] The loading system adopts a hydraulic loading method. Therefore, the loading system also includes a first hydraulic cylinder 17 that cooperates with the first loading mechanism 13, a second hydraulic cylinder 18 that cooperates with the second loading mechanism 14, a third hydraulic cylinder 19 that cooperates with the third loading mechanism 15, and a fourth hydraulic cylinder 20 that cooperates with the fourth loading mechanism 16.

[0044] It should be further explained that, in order for the second loading mechanism 14 to achieve radial and axial loading, the number of the second hydraulic cylinders 18 is three, one for axial loading and the other two for radial loading.

[0045] The test bearing device also includes three auxiliary bearings 59, which are respectively disposed between the first loading mechanism 14 and the inner rotor 52, between the second loading mechanism 15 and the outer rotor 53, and between the fourth loading mechanism 16 and the inner rotor 52.

[0046] Furthermore, in combination Figure 5As shown, the loading system also includes hydraulic oil stations that cooperate with the aforementioned hydraulic cylinders. These hydraulic oil stations supply clean hydraulic oil with adjustable pressure to the entire hydraulic system and cool the return oil to ensure stable oil supply. The hydraulic system is supplied with oil by a hydraulic pump. The oil in the tank is pressurized by the hydraulic pump and filtered by the oil supply filter before being delivered to the substations. The hydraulic oil station is equipped with a bypass, which includes a safety valve to ensure system safety and a proportional relief valve to regulate system pressure. The hydraulic pump is driven by a variable frequency motor, allowing for on-demand adjustment of the oil supply flow. Temperature and pressure sensors are installed on the main oil supply line to monitor the system's temperature and pressure, and an accumulator is also included for pressure stabilization. The hydraulic cylinders are connected to the actuators; the actuator assembly consists of a hydraulic cylinder, tension / compression sensors, a spherical bearing, an elastic element, and connecting parts. The force sensor provides feedback on the actual load applied by the cylinder to the bearing housing. The connecting parts use a pin-and-pin-seat mounting configuration, with a brake pad or retaining ring between the pin and the pin housing for axial stop of the pin, meeting the requirements for cylinder loading.

[0047] The heating system provides the required ambient temperature to the test bearings. Since the relative positions of the test bearings change continuously during different tests, the heating system employs a heat radiation heating method that facilitates easy assembly and disassembly. It mainly consists of infrared radiators, mounting fixtures, connectors and fasteners, temperature sensors (thermocouples), sensing elements, and other accessories. To ensure uniform heating of the test bearings, multiple infrared radiators are evenly arranged circumferentially. The fixtures are mounted circumferentially on the test bearings, evenly distributed 360° to ensure uniform heating. Simultaneously, to maximize heating efficiency, the fixtures are made of reflective material, reflecting infrared radiation from all directions back to the test bearings. Water cooling channels are provided between the bearing bushings and the support housing, allowing for rapid cooling of the housing to an operational temperature after the test.

[0048] Each test bearing is connected to the inner rotor 52 and outer rotor 53, along with each support point, to form a transmission chain that can rotate inwards and outwards. They share a common heating system, loading system, and lubrication system. Each support point is designed with separate oil supply and return pipelines and heating fixtures to meet the lubrication and heating requirements of the bearings at each support point. Each test bearing housing is equipped with an independent hydraulic loading pipeline connected to the loading hydraulic station to meet the loading requirements in different directions. The lubricating oil and hydraulic pipelines at each support point are connected by hoses to facilitate reconnection after adjusting the support point span. The test platform is equipped with a rotary telescopic data acquisition station to meet the signal acquisition requirements of sensors at different positions of each support point.

[0049] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0050] Furthermore, it should be noted that the scope of the methods and systems in the embodiments of the present invention is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. In addition, features described with reference to certain examples may be combined in other examples.

[0051] The embodiments of the present invention have been described above. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of the present invention.

Claims

1. A near-service environment multi-point load synchronous simulation main bearing tester, characterized in that, The test bearing device comprises a mounting shell and an inner rotor, an outer rotor, a first fulcrum, a second fulcrum, a third fulcrum, a fourth fulcrum and a fifth fulcrum arranged in the mounting shell; the first motor drives the inner rotor to rotate through the first speed-increasing box; the second motor drives the outer rotor to rotate through the second speed-increasing box; The outer rotor is sleeved on the inner rotor; the first fulcrum to the fifth fulcrum are arranged in the mounting shell from left to right, and the first fulcrum, the second fulcrum and the fifth fulcrum are arranged on the inner rotor, the third fulcrum is arranged on the outer rotor, and the fourth fulcrum is arranged between the inner rotor and the outer rotor; the test bearing device further comprises a simulation central cone arranged in the mounting shell, and the second speed-increasing box drives the outer rotor to rotate through the simulation central cone; the first fulcrum comprises a first fulcrum shell and a first bearing bushing assembled in the first fulcrum shell and replaceable according to the size of the test bearing model; the second fulcrum comprises a second fulcrum shell and a second bearing bushing assembled in the second fulcrum shell and replaceable according to the size of the test bearing model; the third fulcrum comprises a third fulcrum shell and a third bearing bushing assembled in the third fulcrum shell and replaceable according to the size of the test bearing model; the fourth fulcrum comprises a fourth fulcrum shell and a fourth bearing bushing assembled in the fourth fulcrum shell and replaceable according to the size of the test bearing model; the fifth fulcrum comprises a fifth fulcrum shell and a fifth bearing bushing assembled in the fifth fulcrum shell and replaceable according to the size of the test bearing model; the near-service environment multi-fulcrum load synchronous simulation main bearing tester further comprises a loading system for axial loading and radial loading, the loading system comprises a first loading mechanism, a second loading mechanism, a third loading mechanism and a fourth loading mechanism, the first loading mechanism is located between the first fulcrum and the second fulcrum and is used for radially loading the inner rotor; the second loading mechanism is located between the third fulcrum and the fourth fulcrum and is used for radially loading and axially loading the outer rotor; the third loading mechanism is located between the fourth fulcrum and the fifth fulcrum and is used for radially loading the inner rotor; and the fourth loading mechanism is located on the side of the fifth fulcrum away from the fourth fulcrum and is used for axially loading the inner rotor.

2. A near-service environment multi-point load synchronous simulation main bearing tester according to claim 1, characterized in that, The first speed-increasing box and the second speed-increasing box are both in the form of double outputs.

3. A near-service environment multi-point load synchronous simulation main bearing tester according to claim 1, characterized in that, The loading system further comprises a first hydraulic oil cylinder matched with the first loading mechanism, a second hydraulic oil cylinder matched with the second loading mechanism, a third hydraulic oil cylinder matched with the third loading mechanism and a fourth hydraulic oil cylinder matched with the fourth loading mechanism.

4. The near-service environment multi-point load synchronous simulation main bearing tester according to claim 1 or 3, characterized in that, The test bearing device further comprises three auxiliary test bearings, and the three auxiliary test bearings are respectively arranged between the first loading mechanism and the inner rotor, between the second loading mechanism and the outer rotor, and between the fourth loading mechanism and the inner rotor.

5. A near-service environment multi-point load synchronous simulation main bearing tester according to claim 1, characterized in that, The test bearing device further comprises a first low-speed coupling arranged between the first motor and the first speed-increasing box, a second low-speed coupling arranged between the second motor and the second speed-increasing box, a first high-speed coupling arranged between the first speed-increasing box and the inner rotor, and a second high-speed coupling arranged between the second speed-increasing box and the simulation central cone.

6. A near-service environment multi-point load synchronous simulation main bearing tester according to claim 5, characterized in that, The test bearing device further comprises a first torque and speed sensor arranged between the first speed-increasing box and the first high-speed coupling, and a second torque and speed sensor arranged between the second speed-increasing box and the second high-speed coupling.

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