Axial clearance control method for main bevel gear ring of main speed reducer of helicopter

A main reducer and axial clearance technology, which is applied in the field of helicopter reducer assembly, can solve the problems of restricting assembly progress, wasting manpower and material resources, and achieve the effects of saving disassembly time, reliable work and convenient operation

Pending Publication Date: 2022-07-12
HARBIN DONGAN ENGINE GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Under normal circumstances, repeat the above disassembly, grinding, assembly, and measurement work 3 to 4 times (it takes 8 to 12 hours) to select the axial clearance to be qualified, which greatly wastes manpower and material resources, and at the same time seriously restricts assembly. schedule

Method used

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  • Axial clearance control method for main bevel gear ring of main speed reducer of helicopter
  • Axial clearance control method for main bevel gear ring of main speed reducer of helicopter
  • Axial clearance control method for main bevel gear ring of main speed reducer of helicopter

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Embodiment Construction

[0029] The technical solutions of the present invention will be further elaborated below in conjunction with the accompanying drawings and specific embodiments.

[0030] The axial clearance control method of the main bevel gear ring of the helicopter main reducer includes the following steps:

[0031] 1. Make preparations before assembly, including preparing qualified main bevel gear ring 11, sun gear shaft 12, tapered roller bearing, adjusting washer 1, support seat 2, bearing seat 3;

[0032] 2. Assemble the tapered roller bearing, adjusting washer 1, support seat 2, and bearing seat 3 according to the drawing requirements to form a clearance control assembly;

[0033] 3. Install the assembled clearance control assembly on the measuring tool, and fix the outer ring 5;

[0034] 4. Apply upward axial force to the inner ring 6 of the tapered roller bearing and release it, and measure the axial clearance value of the main bevel gear ring;

[0035] 5. Determine the axial cleara...

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Abstract

The invention relates to an axial clearance control method for a main bevel gear ring of a main speed reducer of a helicopter, which is characterized in that an adjusting pad is arranged between a bearing outer ring and a supporting seat, and the end surface, positioned on the bearing outer ring, of the adjusting pad extends inwards and is provided with an inclined surface matched with a tapered roller end. An original axial clearance control method is changed, several parts need to be assembled, then the axial clearance is measured through a tool, the disassembly time is greatly saved, the disassembly process is simplified, waste of manpower and material resources caused by repeated assembly and disassembly is avoided, the purposes of saving time and cost are achieved, and the assembly progress is guaranteed.

Description

technical field [0001] The invention belongs to the field of helicopter reducer assembly, in particular to a method for controlling axial clearance of a main bevel gear ring of an elevator main reducer. Background technique [0002] The main bevel gear ring of the helicopter main reducer is installed on the casing. After the main bevel gear ring assembly is installed in the main reducer casing, the axial clearance of the main bevel gear ring is measured by applying an upward load to the sun gear shaft, such as figure 1 shown. The axial clearance is derived from the axial clearance of the tapered roller bearing. According to the requirements of use, after the main bevel gear ring is assembled, the axial clearance of the main bevel gear ring is between 0.18 and 0.22mm to ensure that the bearing tapered rollers are fully lubricated during operation. In order to achieve the above present, an adjusting washer 1 is arranged between the tapered roller bearing and the main bevel g...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): F16H57/023F16H57/021F16H57/12
CPCF16H57/023F16H57/021F16H57/12Y02T50/40
Inventor许思蒙王天宇孙杨金鑫汤天罡梁以泽李庆峰
OwnerHARBIN DONGAN ENGINE GRP