CN216160310U

CN216160310U - Sealing tool for tiny oil way hole under semi-closed condition

Info

Publication number: CN216160310U
Application number: CN202122281847.XU
Authority: CN
Inventors: 辛明明; 张宜明; 许妍; 王佳明; 徐阳
Original assignee: AECC Harbin Dongan Engine Co Ltd
Current assignee: AECC Harbin Dongan Engine Co Ltd
Priority date: 2021-09-18
Filing date: 2021-09-18
Publication date: 2022-04-01
Anticipated expiration: 2031-09-18

Abstract

The utility model relates to a sealing tool for a tiny oil way hole under a semi-closed condition; the sealing tool comprises: the sealing rubber gasket is arranged on the end face of any sealing block, and the axial relative position between any sealing block and the connecting shaft can be adjusted within a certain stroke range; one of the first sealing block and the second sealing block is arranged at the oil passage hole of the casing, and the other sealing block is arranged at the position opposite to the oil passage hole. The oil circuit pressure test device is used for an oil circuit pressure test of the aviation transmission equipment case body, can plug a tiny oil circuit hole in the test process, is simple and convenient to operate, and belongs to the field of machining and testing.

Description

Sealing tool for tiny oil way hole under semi-closed condition

Technical Field

The utility model relates to a sealing tool for a tiny oil way hole under a semi-closed condition; the oil circuit pressure test for the aviation transmission equipment case body can plug a tiny oil circuit hole in the test process, is simple and convenient to operate, and belongs to the field of machining and testing.

Background

The aviation transmission equipment needs to adopt a closed transmission scheme and needs to be provided with a special oil duct for realizing the lubrication of transmission parts, the function is generally realized by a casing, and lubricating oil is sprayed out from an oil duct hole through the oil duct inside the casing to realize the lubrication of the transmission parts. The oil circuit pressure test is an important ground test of the transmission case, all oil outlet holes are sealed and a certain pressure is kept by injecting test oil into the oil circuit of the case, and the pressure bearing capacity, the smoothness and the processing quality of the oil circuit of the case are comprehensively checked. The general idea of the sealing test is to seal the oil passage hole in an end face sealing or axial sealing mode, and inject test oil with specific pressure from the oil inlet of the casing to detect the sealing performance of the casing. For controlling the oil outlet quantity, part of oil outlet holes of the oil way are small holes with the diameter of less than 1mm, and the small holes are in a semi-closed environment and have no space and condition for end face sealing or axial sealing; a traditional sealing scheme of the working condition is that a tiny conical wood material is used for sealing the oil way hole, but the sealing effect is poor, and certain potential safety hazards exist.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a solution for sealing a tiny oil way hole under a semi-closed condition.

The specific technical scheme of the utility model is as follows: a tool for sealing a minimal oil passage hole in a semi-closed condition, the tool comprising: the sealing rubber gasket is arranged on the end face of any sealing block, and the axial relative position between any sealing block and the connecting shaft can be adjusted within a certain stroke range; one of the first sealing block and the second sealing block is arranged at the oil passage hole of the casing, and the other sealing block is arranged at the position opposite to the oil passage hole.

Preferably, the first sealing block is connected with the connecting shaft through a left-hand thread pair, and the second sealing block is connected with the connecting shaft through a right-hand thread pair; the axial synchronous adjustment of the two sealing blocks is realized.

Preferably, the connecting shaft adopts a step shaft, and the middle section of the connecting shaft adopts a square shaft; the axial position of the first sealing block and the axial position of the second sealing block are convenient to adjust without being limited to a hexagon, so that the pretightening force between the sealing blocks and the inner wall of the casing is adjusted; when a large pretightening force is required, a through hole can be formed in the middle of the connecting shaft and matched with a tightening tool to enlarge a tightening force arm.

Preferably, the sealing rubber pad is a fluorine rubber pad, so that the requirement of small change of radial dimension of the inner wall of the casing on the flexibility of the tool is met.

Preferably, the hole that sealed piece and connecting axle are connected sets up to the blind hole to when avoiding experimental, pressure oil produces stress concentration between sealed pad and sealed piece, shortens the tool life-span.

According to the utility model, by utilizing the characteristic that the thread transmission pair can convert rotary motion into linear motion, the sealing blocks which are matched with the thread shaft and provided with the corresponding internal thread holes are assembled on the thread shaft with the left-handed threads and the right-handed threads at two ends respectively, when the sealing shaft is rotated, the two sealing blocks axially move in opposite directions along the axial direction of the sealing shaft, so that the effect of simultaneously outwards or inwards moving the two sealing blocks along the sealing shaft is achieved, the rubber pad is arranged on the sealing blocks, the sealing problem of the tiny oil way hole under the semi-closed condition is solved, the test quality of the sealing test required under the working condition is improved, the test effect is ensured, and the safety of the test is improved to a certain extent.

Drawings

FIG. 1 is a schematic structural view of the present invention,

FIG. 2 is a schematic view of a sealing block structure

Figure 3 is a schematic view of the structure of the connecting shaft,

FIG. 4 is a schematic diagram of the present invention.

The sealing device comprises a sealing rubber mat 1, a first sealing block 2, a connecting shaft 3 and a second sealing block 4.

Detailed Description

The operation of the device will be described in detail with reference to the accompanying drawings: a specific sealing tool proposed by the present invention is shown in fig. 1, and comprises a sealing rubber gasket 1, a first sealing block 2, a connecting shaft 3, and a second sealing block 4; the connecting shaft 3 is a steel threaded shaft with left-hand threads and right-hand threads arranged at two ends respectively; the first sealing block 2 is a steel sealing block with one side being a plane and the other side being an arc surface with a certain curvature radius, a left-handed thread blind hole is formed in one side of the plane of the sealing block, and the first sealing block 2 is assembled at one end, provided with a left-handed thread, of the connecting shaft 3; the second sealing block 4 is a steel sealing block with one side being a plane and the other side being the same as the curvature radius of the cambered surface of the first sealing block 2, a right-handed thread blind hole is arranged on one side of the plane of the sealing block, and the second sealing block 4 is assembled at one end of the connecting shaft 3 provided with a right-handed thread; the sealing rubber gasket 1 is a cambered surface with a certain radian cut out from a fluororubber circular ring, the inner curvature radius of the circular ring is consistent with the curvature radius of the cambered surfaces of the left and right sealing blocks, and the outer curvature radius is consistent with the curvature radius of the side wall of the semi-closed space where the oil way hole is located; for convenient operation, the non-threaded shaft section of the connecting shaft 3 is arranged into a regular hexagonal prism, and one side surface is provided with a cylindrical through hole.

Before the tool is used, the positions of a first sealing block 2 and a second sealing block 4 on a connecting shaft 3 are firstly adjusted to enable the first sealing block 2 and the second sealing block 4 to smoothly enter a semi-closed space where an oil way hole needs to be sealed, the connecting shaft 3 is rotated from inside to outside at a position shown by a cross sectional view by using an external hexagonal wrench, the first sealing block 2 moves leftwards along the axial direction of the connecting shaft 3, the second sealing block 4 moves rightwards along the connecting shaft 3, the curvature radius of the outer side of a sealing rubber gasket 1 is consistent with the curvature radius of the side wall of the semi-closed space where the oil way hole is located, and a certain amount of deformation can occur under the stress state, so that the sealing rubber gasket can be tightly attached to the cambered surface where the oil way hole is located in a self-adaptive manner, the contact positions of the left sealing block and the right sealing block and the inner wall of a machine case are guaranteed to be covered by the sealing rubber gasket, so that the oil way hole is tightly sealed, if the test pressure is higher, a longer cylindrical pin can be extended into a cylindrical hole at the side of the connecting shaft 3, and the connecting shaft 3 is continuously rotated to increase the pretightening force, pressure oil is injected into the oil way to complete a pressure test; after the test is finished, the connecting shaft 3 is rotated from outside to inside at the position shown in the sectional view by using an external hexagonal wrench, the first sealing block 2 moves rightwards along the axial direction of the connecting shaft 3, the second sealing block 4 moves leftwards along the connecting shaft 3, and the tool is rotated until the tool can be smoothly taken out from the semi-closed space where the oil way hole is located, so that the tool is used.

Claims

1. A tool for sealing a tiny oil way hole under a semi-closed condition is characterized by comprising: the sealing rubber gasket is arranged on the end face of any sealing block, and the axial relative position between any sealing block and the connecting shaft can be adjusted within a certain stroke range; one of the first sealing block and the second sealing block is arranged at the oil passage hole of the casing, and the other sealing block is arranged at the position opposite to the oil passage hole.

2. The tool for sealing the oil way hole in the semi-closed condition as claimed in claim 1, wherein the first sealing block is connected with the connecting shaft through a left-handed thread pair, and the second sealing block is connected with the connecting shaft through a right-handed thread pair; the axial synchronous adjustment of the two sealing blocks is realized.

3. The tool for sealing the oil passage hole with the minimum size in the semi-closed condition as claimed in claim 1 or 2, wherein the connecting shaft is a stepped shaft, and the middle section of the connecting shaft is a square shaft.

4. The tool for sealing an oil passage hole in a semi-closed condition as claimed in claim 3, wherein a through hole is further formed in the middle section of the connecting shaft, and the through hole is matched with a tightening tool to enlarge a tightening force arm.

5. The tool for sealing a semi-closed oil way hole according to claim 1, wherein the sealing rubber pad is a fluorine rubber pad.

6. The tool for sealing the oil passage hole in the semi-closed condition as claimed in claim 1, wherein the hole for connecting the sealing block and the connecting shaft is a blind hole.