Near-service-environment multi-fulcrum load synchronous simulation main bearing tester

Abstract

The invention discloses a near-service-environment multi-fulcrum load synchronous simulation main bearing tester, and belongs to the technical field of aero-engines. The tester comprises a first motor, a first speed-increasing gearbox, a second motor, a second speed-increasing gearbox and a test bearing device, wherein 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 which are 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 sleeves the inner rotor; the first fulcrum to the fifth fulcrum are sequentially arranged in the installation shell from left to right, 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 beneficial effects are that five bearings can be tested at the same time; and the load simulation range of the bearing tester is expanded.

Description

Technical Field

[0001] The invention belongs to the technical field of aero-engines, and in particular relates to a multi-support load synchronous simulation main bearing tester in a near-service environment. Background Art

[0002] Aircraft engines are characterized by high speed, high temperature, and high rotation speed. The rotor speed is much higher than that of industrial equipment, and light aircraft engines are generally above 30,000 rpm. Therefore, the performance of the spindle bearing is a key factor affecting the safe and reliable operation of the engine, and plays a vital role in the operation of the engine. The spindle bearing is single-point, without redundancy or backup. Once a failure occurs, it will have serious consequences. It is necessary to accurately predict the reliability of the spindle bearing. However, the working conditions of the spindle bearing are complex, and it is difficult to evaluate the reliability simply through theory and simulation. Therefore, the reliability tester of the spindle bearing is of great significance.

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

[0004] The purpose of the present invention is to provide a main bearing tester that can synchronously simulate multi-point loads in a near-service environment, which can meet the requirements of testing 5 bearings at the same time and can simulate the bearing service conditions and environment, thereby solving at least one technical problem involved in the background technology.

[0005] In order to solve the above-mentioned technical problems, the present invention is achieved as follows:

[0006] The present invention provides a near-service environment multi-support load synchronous simulation main bearing tester, comprising a first motor, a first speed increaser, a second motor, a second speed increaser and a test bearing device, wherein 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 increaser; the second motor drives the outer rotor to rotate through the second speed increaser; the outer rotor is sleeved on the inner rotor; the first fulcrum to the fifth fulcrum are sequentially 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.

[0007] Optionally, the test bearing device further comprises a simulated central cone disposed in the mounting housing, and the second speed increasing gearbox drives the outer rotor to operate via the simulated central cone.

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

[0009] Optionally, both the first speed increasing gearbox and the second speed increasing gearbox are of dual output type.

[0010] Optionally, it also includes a loading system for axial loading and radial loading, the loading system including 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 radially load the inner rotor; the second loading mechanism is located between the third fulcrum and the fourth fulcrum and is used to radially load and axially load the outer rotor; the third loading mechanism is located between the fourth fulcrum and the fifth fulcrum and is used to radially load 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 axially load 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 companion test bearings, which 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.

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

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

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

[0016] (1) The bearing bushing can be replaced according to the size of the bearing model, which can meet the performance test, life test and application research test of the aircraft engine bearing component level with a simulated bearing inner diameter of Φ30mm to Φ300mm. It only needs to replace some parts to realize the simulation test of multiple bearings, with strong operability and simple structure;

[0017] (2) The five-point structure can test five bearings at the same time;

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

[0019] (4) By setting up the loading system, axial loading of 0-200kN and radial loading of 0-100kN can be achieved, simulating the service conditions and environment of the bearing and meeting the loading requirements in different directions. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. 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 work, among which:

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

[0022] Figure 2 A working principle diagram 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 A magnified view of part A;

[0025] Figure 5 This is a circuit schematic diagram of the loading system provided by the present invention. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. 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.

[0027] See also Figure 1 and Figure 2 As shown, an embodiment of the present invention provides a multi-point load synchronous simulation main bearing tester in a 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 companion 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] The first motor 1 and the second motor 3 are both variable frequency motors.

[0029] The first speed increasing gearbox 2 and the second speed increasing gearbox 4 both adopt a dual output form, which can adapt to the constant torque output under two speed ranges, and expand the load simulation range of the bearing tester.

[0030] The test bearing device 5 includes a mounting shell 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 arranged in the mounting shell 50 .

[0031] The simulated central cone 51 is disposed in the mounting housing 50 , and the second speed increasing box 4 drives the outer rotor 53 to operate 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 in sequence in the mounting shell 50 from left to right, 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] Further, combined with Figure 3 and Figure 4 As shown, the first fulcrum 54 includes a first fulcrum housing 541 and a first bearing sleeve 542 assembled in the first fulcrum housing 541 and replaceable according to the size of the test bearing model, and the first bearing sleeve 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 sleeve (unnumbered) assembled in the second fulcrum housing 551 and replaceable according to the size of the test bearing model, and the second bearing sleeve is used to fix the test bearing 21 to be tested.

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

[0036] The fourth fulcrum 57 includes a fourth fulcrum housing 571 and a fourth bearing sleeve (unnumbered) assembled in the fourth fulcrum housing 571 and replaceable according to the size of the test bearing model, and the fourth bearing sleeve 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 sleeve (unnumbered) assembled in the fifth fulcrum housing 581 and replaceable according to the size of the test bearing model, and the fifth bearing sleeve is used to fix the test bearing 21 to be tested.

[0038] By setting five fulcrums and replacing the bearing bushing according to the size of the test bearing model, the requirements of testing five bearings at the same time can be met, and performance tests, life tests and application research tests at the level of aircraft engine bearing components with simulated bearing 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 arranged between the first motor 1 and the first speed increaser 2 , and the first torque speed sensor 11 is arranged 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 arranged between the second motor 3 and the second speed increaser 4, the second high-speed coupling 10 is arranged between the second speed increaser 4 and the simulated central cone 15, and the second torque and speed sensor 12 is arranged between the second speed increaser 4 and the second high-speed coupling 10.

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

[0042] See 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 to generate 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 radially load and axially load the outer rotor 53 to generate 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 to generate 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 to generate 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 cooperating with the first loading mechanism 13, a second hydraulic cylinder 18 cooperating with the second loading mechanism 14, a third hydraulic cylinder 19 cooperating with the third loading mechanism 15, and a fourth hydraulic cylinder 20 cooperating with the fourth loading mechanism 16.

[0044] It should be further explained that, in order for the second loading mechanism 14 to realize radial loading 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 further includes three companion test bearings 59 , which are respectively arranged 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] Further, combined with Figure 5As shown, the loading system also includes a hydraulic oil station that cooperates with the above-mentioned hydraulic cylinders. The hydraulic oil station is used to provide clean hydraulic oil with adjustable pressure to the entire hydraulic system, and cool the return oil at the same time to ensure the stability of the system oil supply. The oil supply of the hydraulic system is provided by a hydraulic pump. The oil in the oil tank is pressurized by the hydraulic pump and filtered by the oil supply filter before being delivered to the substation for use. The hydraulic oil station is provided with a bypass, and the bypass is provided with a safety valve to ensure the safety of the system. A proportional relief valve is provided to adjust the system pressure. At the same time, the hydraulic pump is driven by a variable frequency motor and can adjust the oil supply flow as needed. Temperature and pressure sensors are provided on the main oil supply line to monitor the temperature and pressure of the system, and an accumulator is provided for voltage stabilization. The hydraulic cylinder is connected to the actuator; the actuator assembly consists of a hydraulic cylinder, a tension and pressure sensor, a spherical bearing, an elastic element, a connecting piece, etc. The force sensor is used to feedback the actual load applied by the cylinder to the test bearing seat. The connecting piece adopts the installation form of a pin shaft and a pin seat. A brake pad or a retaining ring is provided between the pin shaft and the pin seat for axial stop of the pin shaft to meet the use requirements when the cylinder is loaded.

[0047] The heating system is used to provide the required ambient temperature for the test bearing. Since the relative positions between the test bearings will change with the different tests, the heating system considers using a form of thermal radiation heating that is easy to disassemble and assemble. It is mainly composed of infrared radiators, installation tools, connections and fasteners, temperature sensors (thermocouples), sensing parts and other accessories. In order to ensure that the heated test bearing is heated evenly, a plurality of infrared radiators are evenly arranged in the circumferential direction for heating, and the infrared radiators pass through. The tooling is installed in the circumferential direction of the heated test bearing, and is evenly arranged at 360° to ensure uniform heating. At the same time, in order to maximize the heating efficiency, the tooling is made of reflective material, which can reflect the infrared rays radiated to the surroundings onto the heated test bearing. The bearing bushing and the fulcrum housing are provided with water cooling passages, and the housing can be quickly cooled to an operational temperature after the test.

[0048] Each test bearing is installed together with the inner rotor 52, the outer rotor 53 and each fulcrum to form a transmission chain that can rotate inward and outward, and share a heating system, loading system and lubrication system. Each fulcrum is designed with a separate oil supply, oil return pipeline and heating tooling to meet the lubrication and heating requirements of the bearing tests at each fulcrum. Each test bearing seat 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 of each fulcrum are connected with a hose to facilitate reconnection after adjusting the span of the fulcrum. The test platform is equipped with a rotating and telescopic data acquisition station to meet the signal acquisition requirements of sensors at different positions of each fulcrum.

[0049] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0050] In addition, 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, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved. For example, the described methods may be performed in an order different from that 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 are described above, but the present invention is not limited to the above-mentioned specific implementation modes. The above-mentioned specific implementation modes are merely illustrative and not restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the purpose of the present invention and the claims, all of which are protected by the present invention.

Claims

1. A multi-point load synchronous simulation main bearing tester in a near-service environment, characterized in that: The invention comprises a first motor, a first speed increasing gearbox, a second motor, a second speed increasing gearbox and a test bearing device, wherein the test bearing device comprises a mounting housing 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 housing; the first motor drives the inner rotor to rotate through the first speed increasing gearbox; the second motor drives the outer rotor to rotate through the second speed increasing gearbox; The outer rotor is sleeved on the inner rotor; the first fulcrum to the fifth fulcrum are sequentially 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.

2. The multi-support load synchronous simulation main bearing tester in a near-service environment according to claim 1, characterized in that: The test bearing device further comprises a simulated central cone disposed in the mounting housing, and the second speed increasing box drives the outer rotor to operate via the simulated central cone.

3. The multi-support load synchronous simulation main bearing tester in a near-service environment according to claim 1, characterized in that: The first fulcrum includes a first fulcrum housing and a first bearing sleeve assembled in the first fulcrum housing and replaceable according to the size of the test bearing model; the second fulcrum includes a second fulcrum housing and a second bearing sleeve assembled in the second fulcrum housing and replaceable according to the size of the test bearing model; the third fulcrum includes a third fulcrum housing and a third bearing sleeve assembled in the third fulcrum housing and replaceable according to the size of the test bearing model; the fourth fulcrum includes a fourth fulcrum housing and a fourth bearing sleeve assembled in the fourth fulcrum housing and replaceable according to the size of the test bearing model; the fifth fulcrum includes a fifth fulcrum housing and a fifth bearing sleeve assembled in the fifth fulcrum housing and replaceable according to the size of the test bearing model.

4. The multi-support load synchronous simulation main bearing tester in a near-service environment according to claim 1, characterized in that: The first speed increasing gearbox and the second speed increasing gearbox both adopt a dual output form.

5. The multi-support load synchronous simulation main bearing tester in a near-service environment according to claim 1, characterized in that: It also includes a loading system for axial loading 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 radially load the inner rotor; the second loading mechanism is located between the third fulcrum and the fourth fulcrum and is used to radially load and axially load the outer rotor; the third loading mechanism is located between the fourth fulcrum and the fifth fulcrum and is used to radially load 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 axially load the inner rotor.

6. The multi-support load synchronous simulation main bearing tester in a near-service environment according to claim 5, characterized in that: 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.

7. A multi-support load synchronous simulation main bearing tester in a near-service environment according to claim 5 or 6, characterized in that: The test bearing device further comprises three companion test bearings, which 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.

8. The multi-support load synchronous simulation main bearing tester in a near-service environment according to claim 2, characterized in that: It also includes a first low-speed coupling arranged between the first motor and the first speed increaser, a second low-speed coupling arranged between the second motor and the second speed increaser, a first high-speed coupling arranged between the first speed increaser and the inner rotor, and a second high-speed coupling arranged between the second speed increaser and the simulated central cone.

9. The multi-support load synchronous simulation main bearing tester in a near-service environment according to claim 8, characterized in that: It also includes a first torque and speed sensor disposed between the first speed increasing gearbox and the first high-speed coupling, and a second torque and speed sensor disposed between the second speed increasing gearbox and the second high-speed coupling.

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