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Helicopter rotor shaft bearing pack testing machine

A technology of testing machine and bearing group, which is applied in the direction of mechanical bearing testing, etc., can solve the problems of inaccurate test results, impossibility of testing due to the influence of the use of rotor shaft bearings, reduction of grease, etc., and achieve the comprehensive effect of the testing method

Active Publication Date: 2021-07-23
C&U CO LTD +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the actual operation process, it is not possible to test the influence of different greases on the rotor shaft bearings. Even if the bearings packaged with different types of grease are used for testing each time, it is easy to reduce the grease during the test process and cause the test Inaccurate results occur

Method used

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  • Helicopter rotor shaft bearing pack testing machine
  • Helicopter rotor shaft bearing pack testing machine
  • Helicopter rotor shaft bearing pack testing machine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Helicopter rotor shaft bearing group testing machine, including loading part 1, test mandrel 2, test bearing 3 sleeved on test mandrel 2, assembly assembly 4 for installing test mandrel 2 and test bearing 3, assembly assembly 4 It includes a fixed base 41 for rotationally connecting the test mandrel 2, a bush 42 for assembling the test bearing 3, and a cover 43 assembled with the fixed base 41. The bush 42 is located inside the cover 43 and the outer edge of the bush 42 Offset against the inner wall of the cover body 43; the fixed base 41 has an oil storage tank 411 for receiving the lubricating grease dropped by the test bearing 3, and an oil outlet 4111 communicating with the outside is arranged in the oil storage tank 411; the inner ring of the test bearing 3 and the test The mandrel 2 is fixedly matched, and the outer ring is fixedly matched with the bushing 42; the cover body 43 is provided with an oil inlet hole 431, and when the oil inlet hole 431 is filled with g...

Embodiment 2

[0033] Based on the scheme of Example 1, another optimization is made: the side of the pressure plate 5 opposite to the outer ring of the test bearing 3 is provided with a protrusion 51. When the pressure plate 5 and the bushing 42 are assembled to fix the outer ring of the test bearing 3, the protrusion 51 is against the outer ring of the test bearing 3. The outer ring of the test bearing 3; when the protrusion 51 is against the outer ring of the test bearing 3, there is a gap between the pressure plate 5 and the side of the test bearing 3 for grease to flow through.

[0034] The design of the protrusion 51 can on the one hand fix the outer ring of the test bearing 3 in a targeted manner, and on the other hand allow a gap between the pressure plate 5 and the bearing, and use this gap to match the gap 21 on the test mandrel 2, An oil delivery channel can be formed so that the lubricating grease can flow into the test bearing 3 more conveniently.

[0035] In order to further im...

Embodiment 3

[0039] A further optimization is made for the oil baffle 62 of Embodiment 2: the radial length of the oil baffle 62 extends to the position of the oil storage groove 411 . The radial extent of the oil baffle plate 62 can directly reach the position of the oil storage tank 411, and this setting avoids the problem of poor throwing effect at low speeds.

[0040] In a further configuration, a sealing ring 7 is also provided between the test mandrel 2 and the fixed base 41 , and the sealing ring 7 is located within the coverage of the oil baffle 62 . Utilizing the sealing ring 7 can provide an extra line of defense to ensure the sealing effect.

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Abstract

The invention discloses a helicopter rotor shaft bearing pack testing machine which comprises a loading part, a testing mandrel, a testing bearing arranged on the testing mandrel in a sleeving mode and an assembling assembly used for installing the testing mandrel and the testing bearing. The assembling assembly comprises a fixed base used for being rotationally connected with the test mandrel, a lining used for assembling the test bearing and a cover body assembled with the fixed base, the lining is located in the cover body, and the outer side edge of the lining abuts against the inner wall of the cover body; the fixed base is provided with an oil storage tank for receiving lubricating grease falling from the test bearing, and an oil outlet hole communicated with the outside is formed in the oil storage tank; an inner ring of the test bearing is fixedly matched with the test mandrel, and an outer ring is fixedly matched with the lining; the cover body is provided with an oil inlet hole, and when lubricating grease is injected into the oil inlet hole, the lubricating grease spreads into the test bearing; and the oil inlet hole is connected with the oil outlet hole through an oil pump. Different kinds of lubricating grease can be conveniently supplied, and lubricating grease supply to the bearing can be kept at any time.

Description

technical field [0001] The invention relates to a bearing detection device, in particular to a bearing group testing machine capable of simulating the working condition of a helicopter rotor shaft. Background technique [0002] During the flight of the helicopter, the failure of any component will cause catastrophic consequences. Therefore, it is a very serious and important work to determine the service life of helicopter components. In order to accurately determine the service life of the components of the helicopter, the usual practice is to carry out fatigue tests on the components of the helicopter under simulated real working conditions, and then divide the fatigue life obtained through the test by a safety factor. service life. [0003] In order to overcome the above problems, the Chinese patent application number is CN201810889457.0, which discloses a hydraulic loading system for the combined bearing test machine of the helicopter main rotor system. This hydraulic ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M13/04
CPCG01M13/04
Inventor 黄聚钱韦治国谷广存
Owner C&U CO LTD
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