CN216923395U

CN216923395U - Oil level control device with overpressure protection function

Info

Publication number: CN216923395U
Application number: CN202123307549.XU
Authority: CN
Inventors: 杨星; 谢增; 刘志豪; 单文涛
Original assignee: Yibin Sanjiang Machinery Co Ltd
Current assignee: Yibin Sanjiang Machinery Co Ltd
Priority date: 2021-12-24
Filing date: 2021-12-24
Publication date: 2022-07-08
Anticipated expiration: 2031-12-24

Abstract

The utility model discloses an oil level control device with an overpressure protection function, which is used for solving the problems that a safety valve is required to be arranged in the traditional oil level control device, the structure is complex, the manufacturing cost is high, and faults are easy to occur. Its main structure includes: the float is connected with the valve assembly used for plugging the oil injection hole through the connecting rod assembly. The oil level control device with the overpressure protection function does not need a safety valve and a safety valve controller, simplifies the structure and reduces the manufacturing cost.

Description

Oil level control device with overpressure protection function

Technical Field

The utility model belongs to the field of manufacturing of aviation safety valves, and particularly relates to an oil level control device with an overpressure protection function.

Background

In modern life, the rapid development technology of the aircraft drives the development of the aircraft industry, plays a great role, the civil aviation aircraft is used for transportation and travel in daily life, the life is cheap, and military aircraft guarantee national defense strength of China.

The function of the aircraft fuel system is to store fuel and to supply it safely and reliably to the engine at the required pressures and flow rates under the permitted flight conditions and flight altitude. When a fuel oil system of the fighter plane works, oil in the auxiliary oil tank and the oil in the rear oil tank are respectively conveyed to the front oil tank under the action of pressurized air and the oil conveying pump, then the pressurized oil in the front oil tank is conveyed to a fuel pump of an engine, and in order to control the oil quantity conveyed to the front oil tank from the auxiliary oil tank and the rear oil tank, an oil level control device is arranged and used for controlling the oil level of the oil introduced into the front oil tank. Traditional oil level controlling means need set up relief valve and relief valve controller, and the relief valve controller control safety valve opens in the superpressure, and release pressure, this kind of device structure is complicated, and manufacturing cost is higher, breaks down easily, and later maintenance cost is high.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an oil level control device with an overpressure protection function, and aims to solve the problems that a safety valve is required to be arranged in a traditional oil level control device, the structure is complex, the manufacturing cost is high, and faults are easy to occur.

In order to realize the purpose of the utility model, the technical scheme is as follows: the oil level control device with overpressure protection function is characterized in that the floater is connected with a valve assembly used for plugging an oil injection hole through a connecting rod assembly. The sealing force of the valve component is provided when the floater floats, and the buoyancy can overcome the pressure transmitted by the nozzle in the pressure refueling control subsystem to keep a closed state under normal working pressure by controlling the liquid discharge volume of the floater and the length of the link mechanism; when the system is in overpressure, the thrust generated by the pressure transmitted by the nozzle in the pressure refueling control subsystem is larger than the downward pressure generated by the float due to buoyancy, and the valve assembly is pushed away, so that the function of releasing the pressure is realized.

Further, the connecting rod assembly comprises a connecting rod and a rocker arm, the rocker arm is connected with the shell through a rotating shaft, the rocker arm rotates around the rotating shaft, the connecting rod penetrates through the rocker arm, one end of the connecting rod is connected with the floater, and the other end of the connecting rod is connected with the valve assembly. The connecting rod can only rotate around the rotating shaft, horizontal displacement cannot occur, and the function of a lever is realized.

Furthermore, the valve assembly comprises a pressure rod and a valve, one end of the valve blocks the oil injection hole, and the other end of the valve is connected with the connecting rod through the pressure rod.

Furthermore, the valve assembly further comprises a guide ring for guiding the pressure rod, and the guide ring is connected with the shell. The direction of the connecting rod pressing force is not coincident with the motion direction of the pressing rod, the guide ring controls the motion direction of the valve through guiding the pressing rod, the position of the valve is prevented from deviating, and the oil spray hole cannot be plugged.

Furthermore, a blind hole is formed in the connecting position of the valve and the pressure rod, the pressure rod is arranged in the blind hole, and the valve is in clearance fit with the pressure rod. The pressure bar and the valve assembly are designed in a split mode and can slide, the valve assembly can be guaranteed to be opened on the premise of not being far away from the oil spray hole, and the situation that the valve assembly cannot be aligned when working again can be effectively prevented.

Furthermore, a through hole is formed in the joint of the connecting rod and the pressing rod, a sleeve rod extends out of the tail of the pressing rod, the sleeve rod penetrates through the through hole in the connecting rod, and the connecting rod is in clearance fit with the pressing rod. The direction of the connecting rod pressing the pressing rod is not coincident with the movement direction of the pressing rod, the movable connection prevents parts from being stretched and broken, and the installation is convenient.

Furthermore, a gasket is arranged at the connecting position of the pressure lever and the connecting rod. The quantity of the gaskets can be adjusted, the sealing state of the valve and the oil spray hole is adjusted by increasing or decreasing the quantity of the gaskets, the quantity of the gaskets needs to be increased if the sealing performance needs to be improved according to the requirement of the system on the sealing performance, and otherwise, the quantity of products is reduced.

Furthermore, the valve adopts conical surface sealing rubber soft seal. The flow resistance during pressure relief is improved, and a sealing pair is formed between the valve seat and the valve seat.

Furthermore, the oil drainage channel is connected with external equipment through a pipe joint.

Further, the pipe joint is an HB4-3 universal pipe joint. Is convenient to be connected with the system pipeline.

The utility model has the beneficial effects that:

the opening or non-opening of the valve is directly controlled by the float assembly, and a safety valve controller are not required, so that the structure is simplified, and the manufacturing cost is reduced;

the utility model directly utilizes a mechanical mechanism to realize control, does not need to introduce a control system, has stable mechanical control structure, is not easy to generate faults and is convenient for later maintenance;

the method is simple to operate, convenient, labor-saving and convenient to operate, reduces the operation time, reduces the labor intensity and saves the construction cost.

Drawings

FIG. 1: the utility model has a structure schematic diagram.

Reference numbers and corresponding part names in the drawings:

the oil-water separation device comprises a floater 1, a connecting rod assembly 2, a connecting rod 2-1, a rocker arm 2-2, a rotating shaft 2-3, a gasket 3, a valve assembly 4, a guide ring 4-1, a pressure rod 4-2, a valve 4-3, a pipe joint 5, a shell 6-1, an oil injection hole 6-1 and an oil drainage channel 6-2.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

FIG. 1 shows an oil level control device with an overpressure protection function, which comprises a shell 6, a floater 1, a connecting rod assembly 2 and a valve assembly 4, wherein a pressure relief channel 6-2 is arranged on the shell 6, the pressure relief channel 6-2 is communicated with an inner cavity of the shell 6 through an oil injection hole 6-1, and the pressure relief channel 6-2 is communicated with an oil filling control subsystem through an HB4-3 universal pipe joint 5. A floater 1 is arranged in a cavity of a shell 6, the floater 1 is connected with a valve component 4 for plugging an oil injection hole 6-1 through a connecting rod component 2, the connecting rod component comprises a connecting rod 2-1, a rocker arm 2-2 and a rotating shaft 2-3, the rocker arm 2-2 is connected with the shell 6 through the rotating shaft 2-3, the rocker arm 2-2 rotates around the rotating shaft 2-3, the connecting rod 2-1 penetrates through the rocker arm 2-2, one end of the connecting rod 2-1 is connected with the floater 1, the other end of the connecting rod 2-1 is connected with the valve component 4, the valve component 4 comprises a guide ring 4-1, a pressure rod 4-2 and a valve 4-3, the guide ring 4-1 is connected with the shell 6, a through hole matched with the pressure rod 4-2 is formed in the guide ring 4-1, and the through hole is sleeved with the pressure rod 4-2 and used for limiting the movement direction of the pressure rod; one end of the valve 4-3 is used for plugging the oil injection hole 6-1, the other end of the valve is connected with the connecting rod 2-1 through the pressure rod 4-2, a blind hole is formed in the connecting position of the valve 4-3 and the pressure rod 4-2, the pressure rod 4-2 is arranged in the blind hole, and the valve 4-3 is in clearance fit with the pressure rod 4-2. The pressure lever 4-2 is movably connected with the connecting rod 2-1, a through hole is arranged at the joint of the connecting rod 2-1 and the pressure lever 4-2, a loop bar extends out of the tail part of the pressure lever 4-2, the loop bar passes through the through hole on the connecting rod 2-1, and the connecting rod 2-1 is in clearance fit with the pressure lever 4-2; gaskets 3 are arranged at the connecting positions of the pressure rod 4-2 and the connecting rod 2-1, the number of the gaskets 3 can be adjusted, and the sealing state of the valve 4-3 and the oil spray hole 6-1 is adjusted by increasing or decreasing the number of the gaskets. The valve 4-3 adopts conical surface sealing rubber soft seal, thereby improving the flow resistance during pressure relief and being beneficial to forming a sealing pair with the oil injection hole 6-1.

When the pressure oiling device is used, the pressure oiling device is arranged on a wall plate at the top of a front mailbox, and the pipe joint 5 is externally connected with a pressure oiling control subsystem. When the oil quantity in the current oil tank is sufficient, under normal working pressure, the floater 1 floats up in the oil tank, the linkage valve assembly 4 compresses the oil injection hole 6-1, the compression received by the valve assembly 4 is greater than the pressure transmitted by a nozzle in the pressure oiling control subsystem, and the oil injection hole 6-1 keeps a closed state; when the system is in overpressure, the thrust generated by the pressure transmitted by the nozzle in the pressure refueling control subsystem is larger than the downward pressure generated by the float assembly due to buoyancy, the valve assembly 4 is pushed away, the oil injection hole 6-1 is opened, and the function of releasing the pressure is realized.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An oil level control device with an overpressure protection function is characterized in that a pressure relief channel (6-2) is arranged on a shell (6), the pressure relief channel (6-2) is communicated with an inner cavity of the shell (6) through an oil injection hole (6-1), and a floater (1) is arranged in the inner cavity of the shell (6), and the floater (1) is connected with a valve assembly (4) for blocking the oil injection hole (6-1) through a connecting rod assembly (2).

2. An oil level control device with overpressure protection as claimed in claim 1, characterized in that the connecting rod assembly (2) comprises a connecting rod (2-1) and a rocker arm (2-2), the rocker arm (2-2) is connected to the housing (6) through a rotating shaft (2-3), the rocker arm (2-2) rotates around the rotating shaft (2-3), the connecting rod (2-1) penetrates the rocker arm (2-2), one end is connected to the float (1), and the other end is connected to the valve assembly (4).

3. An oil level control device with overpressure protection as claimed in claim 1 or 2, characterized in that the valve assembly (4) comprises a pressure bar (4-2) and a valve (4-3), one end of the valve (4-3) is used to block the oil injection hole (6-1), and the other end is connected with the connecting rod (2-1) through the pressure bar (4-2).

4. An oil level control device with overpressure protection as claimed in claim 3, characterized in that the shutter assembly (4) further comprises a guide ring (4-1) for guiding the pressure rod (4-2), the guide ring (4-1) being connected to the housing (6).

5. An oil level control device with overpressure protection function as claimed in claim 3, characterized in that the connection position of the valve (4-3) and the pressure lever (4-2) is provided with a blind hole, the pressure lever (4-2) is arranged in the blind hole, and the valve (4-3) and the pressure lever (4-2) are in clearance fit.

6. An oil level control device with overpressure protection function as claimed in claim 3, characterized in that the connecting rod (2-1) is provided with a through hole at the joint with the pressure rod (4-2), the tail of the pressure rod (4-2) extends out of a sleeve rod, the sleeve rod passes through the through hole on the connecting rod (2-1), and the connecting rod (2-1) is in clearance fit with the pressure rod (4-2).

7. An oil level control device with overpressure protection as claimed in claim 3, characterized in that a gasket is arranged between the pressure lever (4-2) and the connecting rod (2-1).

8. An oil level control device with overpressure protection function as claimed in claim 3, characterized in that the valve (4-3) is made of cone sealing rubber.

9. An oil level control device with overpressure protection as in claim 3, characterized by that the drain passage is connected to the external equipment through a pipe connection (5).

10. An oil level control device with overpressure protection function as claimed in claim 9, characterized in that the pipe joint (5) is HB4-3 universal pipe joint.