CN110940462A

CN110940462A - Sealing performance inspection method for constant-speed transmission device shell

Info

Publication number: CN110940462A
Application number: CN201911010641.4A
Authority: CN
Inventors: 钱福平; 苑振宇; 彭杰; 陈为贵; 王啸; 罗雁
Original assignee: Wuhu Tian Hang Equipment Technology Co Ltd
Current assignee: Wuhu Tian Hang Equipment Technology Co Ltd
Priority date: 2019-10-23
Filing date: 2019-10-23
Publication date: 2020-03-31

Abstract

The invention relates to a method for checking the sealing performance of a shell of a constant-speed transmission device, which comprises the following specific steps: firstly, cleaning a shell to avoid residual working solution; secondly, plugging a plurality of holes in the shell (1) by using a tool; thirdly, installing a lubricating oil filling air port and an exhaust port; fourthly, filling lubricating oil into the assembled shell according to requirements; fifthly, checking that the appearance of the shell does not allow residual oil; and sixthly, checking whether the outer surface of the shell has a leakage phenomenon according to the process requirement. The method adopts a long-time low-pressure method, is relatively close to the using state of a product, greatly improves the success rate of detecting slow leakage of the shell, and reduces the additional cost brought by reworking and repairing. Because the device is not dependent on pressurization, the cost is saved, the production efficiency is improved, and the operation is simple and convenient.

Description

Sealing performance inspection method for constant-speed transmission device shell

Technical Field

The invention relates to detection of aircraft parts, in particular to a method for checking the sealing performance of a shell of a constant-speed transmission device.

Background

The casing of the constant-speed transmission device is made of ZM-4T1, and the casing can slowly leak working fluid outwards through the loose structure of the casing under the conditions of long-term internal pressure bearing, environment and working fluid erosion and the like, so that the overall performance of the product is affected. The current available leakage detection means mostly depend on test equipment, the shell cannot be pressurized for a long time, and the fault phenomenon is difficult to detect.

Disclosure of Invention

In order to overcome the defects of detection, the invention provides a method for checking the sealing performance of a shell of a constant speed transmission device.

The technical problem to be solved by the invention is realized by adopting the following technical scheme:

a method for checking the sealing performance of a shell of a constant-speed transmission device comprises the following specific steps:

firstly, cleaning a shell to avoid residual working solution;

secondly, plugging a plurality of holes in the shell by using a tool; the oil filling pipe and the exhaust pipe are connected and screwed down by using the outer sleeve nut.

Thirdly, installing a lubricating oil filling air port and an exhaust port; the oil injection pipe and the exhaust pipe are connected and screwed down by using the outer sleeve nut. And placing the assembled shell and the assembled device on the fixed seat to enable the oil injection pipe and the exhaust pipe to be vertically upward.

Fourthly, filling lubricating oil into the assembled shell according to requirements; and slowly filling the working liquid into the oil filling pipe until the liquid level reaches the top end of the oil filling pipe.

And fifthly, checking the appearance of the shell and not allowing residual oil. Standing the shell for a set time under the pressure generated by the liquid column according to the process requirement; the mixture is kept still for 72 hours, and the liquid level is checked twice daily during the period, and the oil is supplemented appropriately.

And sixthly, checking whether the outer surface of the shell has a leakage phenomenon according to the process requirement, namely whether oil leaks or seeps.

The frock includes that the oil return strains the spiral shell lid, pressure refueling connects, the oiling strains the spiral shell lid, air valve, resets guide seat, blanking cover.

The invention has two main points:

firstly, to the shutoff of complicated casing, especially opening part need use heterotypic metal rubber spare to seal, just can guarantee not leak in long-time test process, can not cause the interference to the test result.

Secondly, the test time is determined according to the actual working conditions of the product and combined with the material object verification of a large number of shells, the test omission can be caused when the time is too short, the cost can be increased when the time is too long, and the production period is influenced.

The invention has the beneficial effects that:

the method adopts a long-time low-pressure method, is relatively close to the using state of a product, greatly improves the success rate of detecting slow leakage of the shell, and reduces the additional cost brought by reworking and repairing. Because the device is not dependent on pressurization, the cost is saved, the production efficiency is improved, and the operation is simple and convenient.

Drawings

The invention is further illustrated with reference to the following figures and examples.

FIG. 1 is a block diagram of a constant speed drive;

FIG. 2 is a cross-sectional view of an oil return filter cap;

FIG. 3 is a cross-sectional view of the pressure filler neck;

FIG. 4 is a front view of the oil filter cap;

FIG. 5 is a cross-sectional view of the oil filter cap;

FIG. 6 is a cross-sectional view of the air flap;

FIG. 7 is a front view of the reset guide;

FIG. 8 is a cross-sectional view of the reset guide;

FIG. 9 is a major face view of the closure;

fig. 10 is a cross-sectional view of the closure.

Detailed Description

In order to make those skilled in the art better understand the technical solution of the present invention, the present invention will be described more clearly and more completely with reference to the drawings in the following embodiments, and it is understood that the described embodiments are only a part of the present invention, rather than all of the present invention, and based on the embodiments, other embodiments obtained by those skilled in the art without inventive exercise are within the protection scope of the present invention.

As shown in fig. 1 to 10, a constant speed transmission device is mainly composed of a casing 1, an oil filling pipe 2, an exhaust pipe 3, a seal end cover 4, a fixing bolt 5, and an oil discharge end cover 6.

firstly, cleaning a shell 1 to avoid residual working solution;

secondly, plugging a plurality of holes in the shell 1 by using a tool; the method comprises the steps of plugging each interface and hole of a shell 1 by using a technical piece, installing a sealing end cover 4 and compressing by using a fixing bolt 5, installing an oil discharge end cover 6 and plugging by using a plugging cap, connecting an oil injection pipe 2 and an exhaust pipe 3, and screwing by using a nut.

Thirdly, installing a lubricating oil filling air port and an exhaust port; the oil injection pipe 2 and the exhaust pipe 3 are connected and screwed down by using a nut. The assembled shell 1 and the device are placed on the fixed seat, and the oil injection pipe 2 and the exhaust pipe 3 are vertically upward.

Fourthly, filling lubricating oil into the assembled shell 1 according to requirements; and slowly filling the working liquid into the oil filling pipe 2 until the liquid level reaches the top end of the oil filling pipe 2.

And fifthly, checking the appearance of the shell 1 to prevent residual oil. Standing the shell 1 for a set time under the pressure generated by the liquid column according to the process requirement; the mixture is kept still for 72 hours, and the liquid level is checked twice daily during the period, and the oil is supplemented appropriately.

And sixthly, checking whether the outer surface of the shell 1 has a leakage phenomenon according to the process requirement, namely whether oil leaks or seeps.

The tool comprises an oil return filter screw cap 71, a pressure oil filling joint 72, an oil filling filter screw cap 73, an air valve 74, a reset guide seat 75 and a blocking cap 76.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are merely illustrative of the principles of the invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A method for checking the tightness of a constant speed transmission housing, characterized in that: the method comprises the following specific steps:

firstly, cleaning a shell (1) to avoid residual working solution;

secondly, plugging a plurality of holes in the shell (1) by using a tool;

thirdly, installing a lubricating oil filling air port and an exhaust port;

fourthly, filling lubricating oil into the assembled shell (1) according to requirements;

fifthly, checking that the appearance of the shell (1) does not allow residual oil;

and sixthly, checking whether the outer surface of the shell (1) has a leakage phenomenon according to the process requirement.

2. A leak tightness inspection method for a constant velocity transmission case according to claim 1, characterized in that: the tool comprises an oil return filter screw cap (71), a pressure oil filling joint (72), an oil injection filter screw cap (73), an air valve (74), a reset guide seat (75) and a blocking cover (76).