KR20170092299A - Precise Load Applying type High Temperature and High Velocity Actual Load Bearing Tester - Google Patents

Precise Load Applying type High Temperature and High Velocity Actual Load Bearing Tester Download PDF

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Publication number
KR20170092299A
KR20170092299A KR1020160013478A KR20160013478A KR20170092299A KR 20170092299 A KR20170092299 A KR 20170092299A KR 1020160013478 A KR1020160013478 A KR 1020160013478A KR 20160013478 A KR20160013478 A KR 20160013478A KR 20170092299 A KR20170092299 A KR 20170092299A
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South Korea
Prior art keywords
speed
bearing
test
load
rotary shaft
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KR1020160013478A
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Korean (ko)
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KR101781730B1 (en
Inventor
김선제
김명호
김용련
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국방과학연구소
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Priority to KR1020160013478A priority Critical patent/KR101781730B1/en
Publication of KR20170092299A publication Critical patent/KR20170092299A/en
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M13/00—Testing of machine parts
    • G01M13/04—Bearings
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M1/00—Testing static or dynamic balance of machines or structures
    • G01M1/14—Determining imbalance
    • G01M1/16—Determining imbalance by oscillating or rotating the body to be tested
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M13/00—Testing of machine parts
    • G01M13/04—Bearings
    • G01M13/045—Acoustic or vibration analysis
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)

Abstract

The high-temperature and high-speed real load bearing tester of the present invention includes a high-speed test drive device (10) for rotating the shaft, a precision high-speed rotary shaft device (20) for supporting a load under test and preventing axial shaking due to load, a bearing housing And a precision load applying device (30) for transferring a load to the test bearing (100) by means of axially and transversely loaded actuators (39-1, 39-2), so that a test bearing The axial load can be eccentrically applied to the bearing outer ring and the housing by supporting the bearing 100 and the lateral load can be applied to the test bearing 100 at the required applied angle through the linear guide 32. [

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high-temperature and high-speed real load bearing tester capable of applying a high-

The present invention relates to an actual load bearing tester, and more particularly, to a high-temperature and high-speed real load bearing tester capable of applying a precise load.

Bearing tester generally uses pneumatic actuator, hydraulic actuator or electric motor to precisely apply axial load and lateral load which have major influence on fatigue life and heat generation of bearing and precisely simulate actual operating condition of bearing . Bearing testers are therefore essential for verifying the test performance of bearings developed for vehicle power shafts, turbo pumps and gas turbines operating under high speed, high load conditions.

For example, FIG. 4 shows a bearing tester of an axial load application type, FIG. 5 shows a bearing tester of a lateral load application type, and FIG. 5 shows an example of a bearing tester of a method of applying a load to the outer ring of the test bearing of FIG.

Korean Patent Laid-Open No. 10-1997-0059719 (August 12, 1997)

However, the bearing tester of FIG. 4 applies the axial load directly to the rotary shaft, thereby causing a structural loss of the rotary shaft and a load loss due to frictional heat at the contact surface between the axial load applying unit and the rotary shaft at high speed.

In addition, since the bearing test machine of the lateral load application system of FIG. 5 applies the load to two identical test bearings dispersedly, it is not possible to precisely implement the test load demand applied to one test bearing, The weight of the test apparatus and the bearing housing is inevitably included according to the application method.

The bearing tester in which the load is applied to the outer ring of the test bearing shown in Fig. 6 can cause misaligned load in which the center of the applied axial load does not coincide with the bearing central axis, There is a problem in that the reliability of the apparatus is reduced. Even when the lateral load is applied, the angle of application of the lateral load may be different from the test required angle due to the change of the contact angle of the bearing.

According to the present invention, the test bearing is supported by the roller bearing having the concentricity with the bearing rotation axis, and the axial load can be eccentrically applied to the bearing outer ring and the housing, and at the same time, the lateral load And to provide a high-temperature and high-speed real-load bearing tester capable of applying a precise load capable of applying a reliable required load to a bearing, in particular, a change in the contact angle and a self- .

In order to accomplish the above object, the present invention provides a high-speed and high-speed actual load bearing tester capable of applying a precision load, A precision high-speed rotary shaft device for attaching a test bearing, receiving a rotational force from the high-speed test drive device and rotating the test bearing; And a precision load applying device for receiving the test bearings and applying an axial load and a lateral load to the test bearings, respectively.

In a preferred embodiment, the high-speed test drive apparatus comprises a low-speed motor, a coupling and an accelerator. Wherein the low speed motor generates a rotational force and the coupling links the low speed motor and the speed increasing gear to each other to cancel lateral shaking caused in the low speed motor, And transmits it to the precision high-speed rotary shaft device.

In a preferred embodiment, the precision high-speed rotary shaft device is constituted by a high-speed rotary shaft, a rotary shaft support structure, a bearing structure, and a preload adjuster. Wherein the high-speed rotary shaft has a test bearing mounting portion to which the test bearings are coupled, and receives a rotational force from the high-speed test drive device; Wherein the rotary shaft support structure passes through the high-speed rotary shaft, the bearing structure is built in, and the preload adjuster is engaged; The bearing structure may include front and rear wide-angle angular bearings that support the front and rear ends of the high-speed rotary shaft to constrain eccentricity and transverse warpage of the high-speed rotary shaft, And a ball bearing for preventing a lateral warping due to the fastening of the rotary shaft support structure; The preload adjuster includes a preload spring that is built in and compressed by the high-speed rotary shaft support structure above the ball bearing, and an adjustment bolt that is fastened to the high-speed rotary shaft support structure while compressing the preload spring.

In a preferred embodiment, the precision load applying device comprises a test bed, a linear slide, a bearing housing, a heater, a velocity sensor, and a pair of actuators. Said linear slide being mounted on said test bed to restrain lateral movement of said bearing housing unit; Wherein the bearing housing is surrounded by a roller bearing to support the front and rear sides of the housing of the test bearing; The heater is provided in the bearing housing to heat the test bearing; The speed sensor measures the rotational speed of the test bearing cage; The pair of actuators is divided into an axial load actuator for applying an axial load to the test bearings and a lateral load actuator for applying a lateral load to the test bearings.

In a preferred embodiment, the linear slide is composed of a pair of first and second linear slides. The roller bearing is composed of a pair of first and second roller bearings. The heater is arranged in the circumferential direction of the bearing housing. The speed sensor is a gap sensor.

The actual load bearing tester of the present invention realizes the following advantages and effects.

First, it is possible to minimize transverse warpage and eccentricity by mounting a test bearing on a precision high-speed rotary shaft supported by an angular ball bearing. Secondly, the test bearing precision load applying section surrounded by a pair of roller bearings concentric with the rotational axis supports the self-weight of the bearing housing and the test apparatus, and consequently the axial load can be applied without being eccentrically to the test bearings. Third, accurate lateral loads can be applied to the test bearings by the linear slide constructed on the test bed at the bottom of the precision load application section of the test bearings even in the case of changes in the bearing contact angle. Fourth, a heater can be inserted into a test section to perform a test for a high temperature bearing sump situation simulating bearing operating conditions of a gas turbine engine.

FIG. 1 is a configuration diagram of a high-temperature and high-speed real load bearing tester capable of applying a precise load according to the present invention, FIG. 2 is a detailed configuration diagram of a high-precision rotational shaft device according to the present invention, FIG. 5 is an example of a bearing test machine of a conventional lateral load application type, FIG. 6 is a diagram showing a conventional test apparatus This is an example of a bearing tester in which a load is applied to an outer ring of a bearing.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings, which illustrate exemplary embodiments of the present invention. The present invention is not limited to these embodiments.

1 to 3 show a configuration diagram of a high-temperature and high-speed actual load bearing tester capable of applying a precision load according to the present embodiment.

1, an actual load bearing tester is composed of a high-speed test drive device 10, a high-precision high-speed rotary shaft device 20 and a precision load applying device 30, The test drive device 10 and the test controller 200 for controlling the precise load applying device 30 are linked.

In one example, the high-speed test drive apparatus 10 is configured to generate power for rotating the shaft at high speed. The precision high-speed rotary shaft device 20 is configured to support a load of the test bearing 100 and to prevent axial shaking due to a load. The precision load applying device 30 is configured to transmit the load of the test bearing 100 while applying its own bearing housing and to apply an axial load and a lateral load, respectively.

For example, the test controller 200 sets test conditions for the test bearing 100 and generates an output for the test conditions to control the high-speed test drive apparatus 10 and the precision load applying apparatus 30 , A dedicated system for bearing testing, or a computer such as a notebook computer.

Referring again to FIG. 1, the high-speed test drive apparatus 10 includes a low-speed motor 11, a coupling 12, and a speed reducer 13.

The low-speed motor 11 generates a rotational force. The coupling 12 connects the low speed motor 11 and the speed reducer 13 to each other to cancel the transverse shaft shake generated by the low speed motor 11 to thereby stably rotate the high speed rotary shaft of the high speed rotary shaft device 20. [ . The speed increasing device 13 receives the rotational force of the low speed motor 11 through the coupling 12 and accelerates the rotation of the low speed motor 11 and transfers the speed to the high speed rotating shaft of the high speed rotating shaft device 20.

In particular, the low-speed motor 11 is a motor type capable of outputting high output in place of an expensive high-speed spindle having a low output. The coupling 12 and the speed reducer 13 prevent the load acting on the rotary shaft of the high-speed rotary shaft device 20 from being transmitted to the low-speed motor 11 so that the low- Only the increased gear loss of the gearbox 13 is met.

Therefore, the high-speed test drive apparatus 10 does not require the test bearing drive shaft required for the high-speed spindle motor and a separate bearing for the test drive shaft, thereby enabling the dispersion of the applied load and the loss The accuracy of the test can be increased.

2, the precision high-speed rotary shaft device 20 includes a high-speed rotary shaft 21, a rotary shaft support structure 23, bearing structures 25-1, 25-2, 26 and a preload adjuster 27 do.

The high-speed rotary shaft 21 is connected to an end of the speed-increase gear 13 and rotates at a high speed to form a test bearing mounting portion 21-1 at the shaft end to which the test bearing 100 is coupled. Therefore, the high-speed rotary shaft 21 supports the bearing when a load is applied to the test bearing 100, and minimizes shaking and deformation of the high-speed rotary shaft 21 even under a high load applied state.

The rotary shaft support structure 23 is used as a structure in which the high-speed rotary shaft 21 penetrates, the bearing structures 25-1, 25-2, 26 are incorporated, and the preload adjuster 27 is engaged. In particular, the high-speed rotary-shaft support structure 23 is divided into two structures and connected to each other by the fastening of the preload adjuster 27 to be integrated.

The bearing structures 25-1, 25-2, and 26 are composed of front and rear wide-angle angular bearings 25-1 and 25-2 and a ball bearing 26, respectively. The front and rear angular bearings 25-1 and 25-2 support the high-speed rotary shaft 21 at the front end and the rear end of the high-speed rotary shaft 21, respectively. The axial eccentric load of the high- The eccentricity and the transverse warpage of the high-speed rotary shaft 21 are restricted to be 1 mu m or less even under the application of the directional load. The ball bearing 26 is composed of a plurality of ball bearing sets and is positioned between the preload spring 27-1 and the high-speed rotary shaft support structure 23 with a "0" tolerance structure, Thereby preventing lateral warpage due to the fastening of the rotary shaft support structure 23.

The preload adjuster 27 is composed of a preload spring 27-1 and an adjustment bolt 27-2. The preload spring 27-1 is built in the high-speed rotary-shaft support structure 23 at the top of the ball bearing 26 and is compressed. The adjusting bolt 27-2 compresses the preload spring 27-1 and provides fastening force so that the high-speed rotary shaft support structure 23 is integrated.

Therefore, the precision high-speed rotary shaft device 20 can prevent the load to be applied to the test bearing 100 from being dispersed by the deformation or eccentricity of the structure of the test bearing 100, I can solve the problem.

3, the precision load applying device 30 includes a test bed 31, a linear slide 32, a bearing housing unit 33, and a pair of actuators 39-1 and 39-2 .

The test bed 31 provides a space for installing the linear slide 32 and the bearing housing unit 33 and constitutes a lower end portion of the precision load applying device 30. [

The linear slide (32) is installed side by side on the test bed (31) to restrain lateral movement of the bearing housing unit (33). For this purpose, the linear slide 32 is constituted by a pair of first and second linear slides 32a and 32b, and the first and second linear slides 32a and 32b are supported by the bearing housing unit 33 to the bearing housing 34, thereby accurately realizing the required lateral load even in the operating condition in which the contact angle is changed. In particular, the first and second linear slides 32a and 32b may simulate a mis-aligned bearing mounting situation when necessary.

The bearing housing unit 33 includes a bearing housing 34, a heater 36, a velocity sensor 37, and a pair of pressure plates 38-1 and 38-2.

For example, the bearing housing 34 is surrounded by a roller bearing 35 composed of a pair of first and second roller bearings 35a and 35b, and a rear end of the precision high-speed rotary shaft device 20 and a pair of actuators 39-1, 39-2, thereby supporting the front and rear sides of the housing of the test bearing 100. [ The heater 36 is arranged in the circumferential direction of the bearing housing 34 and simulates a high-temperature operation state through sump heating of the test bearing 100. The speed sensor 37 measures a rotational speed of a cage of the test bearing 100 and applies a gap sensor. The pair of pressure plates 38-1 and 38-2 includes an axial pressure plate 38-1 and a horizontal pressure plate 38-2 and the axial pressure plate 38-1 is fixed to the bearing housing 34 A load is applied from the axial load actuator 39-1 and the lateral pressure plate 38-2 is padded on one side of the first and second roller bearings 35a and 35b to be loaded on the lateral load actuator 39 -2).

Therefore, the bearing housing unit 33 has a structure surrounding the test bearing housing, and is constituted by a pair of roller bearings to support the self weight of the test portion and prevent the self-weight other than the required load from being applied to the test bearings. In addition, by making the center of rotation axis of the test bearing coincide with the rotation center of the roller bearing, unnecessary moment is not applied to the test bearing even when the axis / lateral load is applied so that the required axial load can be accurately applied to the test bearing Respectively.

For example, the pair of actuators 39-1 and 39-2 are mounted on the axle load actuator 39-1 and the test subject bearing 100 to apply an axial load to the test subject bearing 100) And a lateral load actuator 39-2 for applying a directional load. In particular, the axle load actuator 39-1 has a rod of a wide shape drawn out from the actuator to uniformly transmit a pressing force to the axial pressure plate 38-1. The lateral load actuator 39-2 has a rod of a wide shape drawn out from the actuator to uniformly transmit a pressing force to the lateral pressure plate 38-2.

Therefore, the actual load bearing tester can implement the following test conditions. First, a precise bearing supported by a pair of angular bearings (25-1, 25-2) By mounting the test bearing 100 on the high-speed rotary shaft 21, lateral warping and eccentricity can be minimized. Second, the bearing housing 34 is surrounded and supported by a pair of roller bearings 35a and 35b concentric with the high-speed rotary shaft 21, so that the axial load can be applied to the test bearing 100 without being eccentric . Third, an accurate lateral load can be applied to the test bearing 100 by the pair of linear slides 32a and 32b formed in the test bed 31 even in a situation where the contact angle of the test bearing 100 changes. Fourth, a heater 36 can be inserted into the test section to perform a test for a high temperature bearing sump situation simulating the bearing operating conditions of the gas turbine engine.

As described above, the high-temperature and high-speed actual load bearing tester capable of applying a precise load according to the present embodiment includes a high-speed test drive apparatus 10 for generating high-speed rotation, a high- A precision high-speed rotary shaft device 20 for rotating the test bearings 100 with a rotational force transmitted from the test bearings 100, a plurality of test bearings 100 for receiving the test bearings 100 and applying the axial load and the lateral load to the test bearings 100, It is possible to apply the axial load from which the eccentricity is removed and the lateral load due to the required angle of application to the test bearing 100 by including the load applying device 30 and particularly to the change of the contact angle and the reliable required load excluding the self- Apply to bearings.

10: high speed test drive device 11: low speed motor
12: Coupling 13: Speedometer
20: precision high-speed rotary shaft device 21: high-speed rotary shaft
21-1: Test bearing mounting portion 23: Rotary shaft support structure
25-1, 25-2: front and rear angular bearings
26: Ball bearing 27: Preload adjuster
27-1: Preload spring 27-2: Adjusting bolt
30: precision load applying device 31: test bed
32: Linear slide
32a, 32b: first and second linear slides
33: bearing housing unit 34: bearing housing
35: roller bearings 35a, 35b: first and second roller bearings
36: heater 37: speed sensor
38-1: axial pressure plate 38-2: lateral pressure plate
39-1: Axial load actuator 39-2: Lateral load actuator
100: Test bearing 200: Test controller

Claims (8)

A high-speed test drive device for generating high-speed rotation;
A precision high-speed rotary shaft device for attaching a test bearing, receiving a rotational force from the high-speed test drive device and rotating the test bearing;
A precision load applying device for receiving the test bearings and applying an axial load and a lateral load to the test bearings respectively;
And a high-speed and high-speed real-load bearing tester capable of applying a precise load.
The apparatus of claim 1, wherein the high-speed test drive apparatus is constituted by a low-speed motor, a coupling and an accelerator;
Wherein the low speed motor generates a rotational force and the coupling links the low speed motor and the speed increasing gear to each other to cancel lateral shaking caused in the low speed motor, And the speed is transferred to the precision high-speed rotary shaft device. The high-speed and high-speed real-load bearing tester capable of applying a precision load.

[2] The apparatus of claim 1, wherein the precision high-speed rotary shaft device comprises a high-speed rotary shaft, a rotary shaft support structure, a bearing structure, and a preload adjuster;
Wherein the high-speed rotary shaft has a test bearing mounting portion to which the test bearings are coupled, and receives a rotational force from the high-speed test drive device; Wherein the rotary shaft support structure passes through the high-speed rotary shaft, the bearing structure is built in, and the preload adjuster is engaged;
Wherein the pair of bearing structures include front and rear wide-angle angular bearings for supporting the front and rear ends of the high-speed rotary shaft to restrain eccentricity and transverse warpage of the high-speed rotary shaft, And a ball bearing for preventing lateral warping caused by fastening of the high-speed rotary shaft support structure;
Wherein the preload adjuster comprises a preload spring which is built in and compressed by the high-speed rotary shaft support structure above the ball bearing, and an adjustment bolt which is fastened to the high-speed rotary shaft support structure while compressing the preload spring. Possible high temperature and high speed real load bearing tester.
The apparatus of claim 1, wherein the precision load applying device is composed of a test bed, a linear slide, a bearing housing, a heater, a velocity sensor, and a pair of actuators;
Said linear slide being mounted on said test bed to restrain lateral movement of said bearing housing unit;
Wherein the bearing housing is surrounded by a roller bearing to support the front and rear sides of the housing of the test bearing;
The heater is provided in the bearing housing to heat the test bearing;
The speed sensor measures the rotational speed of the test bearing cage;
Wherein said pair of actuators are divided into an axial load actuator for applying an axial load to said test bearings and a lateral load actuator for applying a lateral load to said test bearings. Load bearing tester.
The high-speed and high-speed actual-load bearing tester according to claim 4, wherein the linear slide is constituted by a pair of first and second linear slides.
The high-speed and high-speed actual load bearing tester according to claim 4, wherein the roller bearing is constituted by a pair of first and second roller bearings. 5. The tester according to claim 4, wherein the heater is arranged in the circumferential direction of the bearing housing.
The tester of claim 4, wherein the speed sensor is a gap sensor.
KR1020160013478A 2016-02-03 2016-02-03 Precise Load Applying type High Temperature and High Velocity Actual Load Bearing Tester KR101781730B1 (en)

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Cited By (7)

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Publication number Priority date Publication date Assignee Title
CN108344566A (en) * 2018-01-31 2018-07-31 合肥工业大学 A kind of flexible load monitoring test equipment of Rotor Systems
CN109342759A (en) * 2018-12-21 2019-02-15 大庆智美石油科技有限公司 A kind of photoelectric sensor system applied to tachometric survey
CN109470464A (en) * 2018-12-04 2019-03-15 苏州飞格立工程塑料有限公司 A kind of idler wheel hydrolysis test preprocess method and equipment
CN111855203A (en) * 2019-04-08 2020-10-30 杭州盾航轴承技术有限公司 Steering bearing dynamic durability test device
KR102329057B1 (en) * 2021-01-11 2021-11-19 윤서진 Apparatus for inspecting rolling bearing and method thereof
KR20220080296A (en) * 2020-12-07 2022-06-14 주식회사 코리아시뮬레이터 The relay switch of bi-directional charger/discharger
KR102634232B1 (en) * 2022-09-20 2024-02-06 주식회사 한일하이테크 Cryogenic Bearing Test apparatus with Lower Support spaced apart from Cryogenic Chamber

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108344566A (en) * 2018-01-31 2018-07-31 合肥工业大学 A kind of flexible load monitoring test equipment of Rotor Systems
CN109470464A (en) * 2018-12-04 2019-03-15 苏州飞格立工程塑料有限公司 A kind of idler wheel hydrolysis test preprocess method and equipment
CN109342759A (en) * 2018-12-21 2019-02-15 大庆智美石油科技有限公司 A kind of photoelectric sensor system applied to tachometric survey
CN111855203A (en) * 2019-04-08 2020-10-30 杭州盾航轴承技术有限公司 Steering bearing dynamic durability test device
CN111855203B (en) * 2019-04-08 2021-12-24 杭州盾航轴承技术有限公司 Steering bearing dynamic durability test device
KR20220080296A (en) * 2020-12-07 2022-06-14 주식회사 코리아시뮬레이터 The relay switch of bi-directional charger/discharger
KR102329057B1 (en) * 2021-01-11 2021-11-19 윤서진 Apparatus for inspecting rolling bearing and method thereof
KR102634232B1 (en) * 2022-09-20 2024-02-06 주식회사 한일하이테크 Cryogenic Bearing Test apparatus with Lower Support spaced apart from Cryogenic Chamber

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