CN210318888U - Oil supply joint of engine gear box - Google Patents
Oil supply joint of engine gear box Download PDFInfo
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- CN210318888U CN210318888U CN201921113345.2U CN201921113345U CN210318888U CN 210318888 U CN210318888 U CN 210318888U CN 201921113345 U CN201921113345 U CN 201921113345U CN 210318888 U CN210318888 U CN 210318888U
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Abstract
The application belongs to the technical field of aero-engine gear box tests and relates to an oil supply connector of an engine gear box. The oil supply connector comprises a pipe connector and a flow limiting nozzle, the front end of the pipe connector is connected with an oil supply pipeline of an engine, the rear end of the pipe connector is connected to the inlet end of the gear box, the pipe connector is provided with a through hole extending from the front end to the rear end to form an oil supply channel, the through hole is provided with an internal thread to match with the flow limiting nozzle, the flow limiting nozzle is provided with a flow limiting hole penetrating through the front end and the rear end, and the inner diameter of the flow limiting hole is smaller. The oil supply pressure difference adjustable demand of the lubricating oil at the oil supply inlet of the gear box is solved, the flow test in the single-piece state of the oil supply pipe joint is realized, the reliability and the maintainability of the gear box are improved, and the production difficulty and the cost are greatly reduced.
Description
Technical Field
The application belongs to the technical field of aero-engine gear box tests, and particularly relates to an oil supply connector of an engine gear box.
Background
The main mode of power transmission of an aircraft engine is gear transmission, and a gear box is the most main power transmission device. To ensure reliable operation of the gearbox, it is common to provide for major structural components such as: gears, bearings, etc. are forcibly lubricated.
It is common to use a double-ended threaded supply line connection to connect the gearbox to the engine supply line. The diameter of the oil path in the oil supply pipe joint is designed to be close to the diameter of the oil path in the gear box in consideration of the strength and reliability requirements of the oil supply pipe joint and the flow resistance loss of the lubricating oil path. In order to meet the requirement of an engine on the total oil supply quantity of the gear box, the oil supply inlet of the gear box is provided with a flow limiting nozzle with an adjustable aperture which is connected with an oil supply pipe joint in series so as to be convenient for adjusting the oil supply pressure difference on the oil supply oil way of the gear box, but the oil supply mode needs to assemble the oil supply pipe joint and the flow limiting nozzle on the gear box at the same time and can only adjust the oil supply pressure difference under the condition of a gear box assembly. Usually, a gearbox flow test is performed before a complete engine test to simulate the flow of the gearbox under the actual working condition of the engine. During the flow test, the traditional oil supply structure with the oil supply pipe joint and the flow limiting nozzle connected in series can realize the adjustment of the flow of lubricating oil only by repeatedly assembling and disassembling the oil supply pipe joint and the flow limiting nozzle, thereby increasing the assembly and decomposition difficulty and easily causing the thread damage at the assembly part of the flow limiting nozzle.
Therefore, a simple and reliable oil supply structural form is required to be found, oil supply at the inlet of the gear box is met, flow limitation is realized, meanwhile, assembly and disassembly are facilitated, and damage to an assembly connection structural part is avoided.
SUMMERY OF THE UTILITY MODEL
In order to solve the above problem, the present application provides an engine gearbox fuel feeding connects, includes:
a pipe joint, the front end of which is connected with an engine oil supply pipeline, the rear end of which is connected with the inlet end of the gear box, the pipe joint is provided with a through hole which extends from the front end to the rear end and forms an oil supply channel, the through hole comprises a first part and a second part, the inner diameter of the first part is larger than that of the second part, so that a step is formed between the first part and the second part, and the first part of the through hole is provided with internal threads;
the flow limiting nozzle is provided with an external thread and is installed in the first part of the through hole of the pipe joint in an adaptive mode, the flow limiting nozzle is provided with a flow limiting hole penetrating through the front end and the rear end, and the inner diameter of the flow limiting hole is smaller than that of the second part of the through hole of the pipe joint.
Preferably, the first portion of the coupler through bore is located at a forward end of the coupler and the second portion of the coupler through bore is located at a rearward end of the coupler.
Preferably, the flow limiting nozzle and the pipe joint are assembled by interference threads.
Preferably, one end of the flow limiting nozzle is inwards recessed from the end face to form a strip-shaped groove.
Preferably, the flow limiting hole of the flow limiting nozzle is a polygonal hole.
Preferably, the end of the pipe joint connected to the engine oil supply line is tapered.
Preferably, the front end of the pipe joint is provided with an external thread which is in threaded connection with an engine oil supply pipeline.
Preferably, the rear end of the pipe joint is provided with external threads which are in threaded connection with the inlet end of the gear box.
The key point of the application lies in that the flow limiting nozzle is integrated on the oil supply pipe joint, the adjustment of the flow of lubricating oil is realized at the oil supply inlet of the gear box, and the flow test can also be carried out under a single piece of the oil supply pipe joint.
The application solves the requirement that the lubricating oil supply pressure difference of the oil supply inlet of the gear box is adjustable, realizes the flow test of the single state of the oil supply pipe joint, improves the reliability and the maintainability of the gear box, and greatly reduces the production difficulty and the cost.
Drawings
FIG. 1 is a schematic view of an engine gearbox fuel supply joint configuration of the present application.
Fig. 2 is a schematic structural view of the flow restriction nozzle of the embodiment shown in fig. 1 of the present application.
Wherein, 1-pipe joint and 2-flow limiting nozzle.
Detailed Description
In order to make the implementation objects, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be described in more detail below with reference to the accompanying drawings in the embodiments of the present application. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are some, but not all embodiments of the present application. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present application, and should not be construed as limiting the present application. All other embodiments obtained by a person of ordinary skill in the art without any inventive work based on the embodiments in the present application are within the scope of protection of the present application. Embodiments of the present application will be described in detail below with reference to the drawings.
The existing oil supply structure of an oil supply inlet of an aircraft engine gearbox mostly adopts a structure form that an oil supply pipe joint and a flow limiting nozzle are connected in series, for the gearbox with the requirement of the total oil supply quantity, the flow limiting nozzle can realize the adjustment of the lubricating oil supply pressure difference during the flow test of the gearbox so as to adjust the total oil supply quantity, but the oil supply structure can only carry out the flow test at the state of a gearbox assembly, and in order to ensure the flow requirement of the gearbox, the aperture of the flow limiting nozzle needs to be adjusted repeatedly and the oil supply pipe joint needs to be assembled and disassembled repeatedly. The repeatedly assembling and disassembling of the flow-limiting nozzle to adjust the oil supply quantity easily causes damage to a threaded connection structural part, increases operation difficulty and production cost, and is not beneficial to maintenance of the gear box.
The application engine gearbox fuel feeding connects, as shown in FIG. 1, includes:
a pipe joint 1, the front end of which is connected with an engine oil supply pipeline, the rear end of which is connected with the inlet end of a gear box, wherein the pipe joint 1 is provided with a through hole extending from the front end to the rear end to form an oil supply channel, the through hole comprises a first part and a second part, the inner diameter of the first part is larger than that of the second part, so that a step is formed between the first part and the second part, and the first part of the through hole is provided with an internal thread;
and the flow limiting nozzle 2 is provided with an external thread and is installed in the first part of the through hole of the pipe joint 1 in an adaptive mode, the flow limiting nozzle is provided with a flow limiting hole penetrating through the front end and the rear end, and the inner diameter of the flow limiting hole is smaller than that of the second part of the through hole of the pipe joint 1.
The application provides an engine gear case fuel feeding connects, the front end of coupling 1 is the conical surface structure for the joint of threaded connection gear case fuel feeding entry (fuel feeding line), the rear end is the cylinder part, assembles on the gear case casing through the screw thread, and makes the central through-hole butt joint gear case's of coupling 1 entry end. The flow limiting nozzle 2 is assembled in the pipe joint through interference threads, as shown in figure 1, one end of the flow limiting nozzle can be abutted to the step, and the other end of the flow limiting nozzle adopts a linear groove design and is used for fixing a tool, so that the flow limiting nozzle is convenient for operation of workers during assembly and disassembly. The oil supply device integrates the flow limiting nozzle on the oil supply pipe joint, and the flow limiting nozzle and the oil supply pipe joint can be assembled and disassembled along with the gear box.
The inner diameter of the flow limiting hole of the flow limiting nozzle is small, the flow limiting function is achieved, the outer diameter of the flow limiting nozzle is designed into the inner diameter of a matched pipe joint in a unified mode, and accordingly the flow limiting nozzle with the flow limiting holes with different inner diameters can be machined, and the flow limiting adjusting function is achieved.
In an alternative embodiment, the flow-restricting orifice of the flow-restricting nozzle 2 may be designed as a polygonal hole, for example, a rectangular hole, instead of the in-line recess design, so as to facilitate the installation of the flow-restricting nozzle 2 into the pipe joint 1 by means of an adapted square wrench.
In some alternative embodiments, in order to secure the flow restriction nozzle 2 in the pipe joint 1, a first portion of the through hole of the pipe joint 1 having a larger inner diameter is provided as an inlet end for lubricating oil, and a second portion having a smaller inner diameter is provided as an outlet end for lubricating oil, i.e., the first portion of the through hole of the pipe joint 1 is located at the front end of the pipe joint 1, and the second portion of the through hole of the pipe joint 1 is located at the rear end of the pipe joint 1, so that after the flow restriction nozzle 2 is installed in the pipe joint 1, the flow restriction nozzle 2 is secured in the pipe joint 1 due to the force of the lubricating oil.
Generally, under the condition of a certain lubricating oil supply temperature, a certain lubricating oil supply structure and a certain lubricating oil outlet pressure, the flow of the nozzle can be adjusted by adjusting the front-back oil supply pressure difference of the nozzle. For a gear box with a requirement on oil supply quantity, a flow limiting nozzle capable of adjusting oil supply pressure difference is often arranged at an oil supply inlet of the gear box. When the flow test of the gear box is carried out, the oil supply quantity of the lubricating oil meets the design requirement by adjusting the oil supply pressure difference, namely the diameter of the flow limiting nozzle is adjusted to realize the adjustment of the flow.
To meet the total flow requirement of lubricating oil, the flow-limiting nozzle at the oil supply inlet needs to be adjusted repeatedly, and the flow-limiting nozzle can be repeatedly assembled and disassembled on the gear box. The integrated oil supply device can realize a single-piece flow test without repeatedly adjusting the oil supply inlet nozzle in the state of the gear box component. This novel oil supply unit carries out the flow test under the single-piece state, if the flow is unqualified, decomposes the choke down, adjusts the choke aperture and satisfies the designing requirement until the flow. The qualified lubricating oil flow under the single oil supply device is the total oil supply under the condition of the gearbox assembly.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present application should be covered within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (8)
1. An engine gearbox oil feed connection, comprising:
the oil supply device comprises a pipe joint (1), a gear box and a control device, wherein the front end of the pipe joint (1) is connected with an oil supply pipeline of an engine, the rear end of the pipe joint is connected with the inlet end of the gear box, the pipe joint (1) is provided with a through hole which extends from the front end to the rear end and forms an oil supply channel, the through hole comprises a first part and a second part, the inner diameter of the first part is larger than that of the second part, a step is formed between the first part and the second part, and the first part of the through hole;
the flow limiting nozzle (2) is provided with an external thread and is installed in the first part of the through hole of the pipe joint (1) in an adaptive mode, the flow limiting nozzle is provided with a flow limiting hole penetrating through the front end and the rear end, and the inner diameter of the flow limiting hole is smaller than the inner diameter of the second part of the through hole of the pipe joint (1).
2. Engine gearbox oil feed connection according to claim 1, characterized in that a first part of the through hole of the pipe connection (1) is located at the front end of the pipe connection (1) and a second part of the through hole of the pipe connection (1) is located at the rear end of the pipe connection (1).
3. The engine gearbox oil supply connection according to claim 1, characterized in that the flow restriction nozzle (2) is fitted with the pipe connection (1) by interference threads.
4. The engine gearbox oil supply joint as recited in claim 1, characterized in that one end of the flow restriction nozzle (2) is recessed from the end face to form a strip-shaped groove.
5. The engine gearbox oil supply connection as claimed in claim 1, characterized in that the flow restriction orifice of the flow restriction nozzle (2) is a polygonal hole.
6. Engine gearbox oil feed connection according to claim 1, characterized in that the end of the connection piece (1) to the engine oil feed line is tapered.
7. The engine gearbox oil supply connection according to claim 1, characterized in that the front end of the pipe connection (1) is provided with an external thread for screwing with an engine oil supply line.
8. The engine gearbox oil supply connection according to claim 1, characterized in that the rear end of the pipe connection (1) is provided with an external thread for screwing with the inlet end of the gearbox.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921113345.2U CN210318888U (en) | 2019-07-16 | 2019-07-16 | Oil supply joint of engine gear box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921113345.2U CN210318888U (en) | 2019-07-16 | 2019-07-16 | Oil supply joint of engine gear box |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210318888U true CN210318888U (en) | 2020-04-14 |
Family
ID=70123470
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921113345.2U Active CN210318888U (en) | 2019-07-16 | 2019-07-16 | Oil supply joint of engine gear box |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210318888U (en) |
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2019
- 2019-07-16 CN CN201921113345.2U patent/CN210318888U/en active Active
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