CN116006617A - Buffer with telescopic function - Google Patents

Abstract

The buffer with the telescopic function is characterized in that an upper end cover and a lower end cover are arranged at two ends of the outer cylinder, a floating piston used for isolating the air cavity from the buffer oil cavity is arranged in the outer cylinder, and one end of the core rod penetrates through the floating piston and is arranged in the air cavity and the buffer oil cavity after being arranged on the upper end cover; the outer cylinder is provided with an inflation valve for inflating the air cavity and a pipe joint for connecting a hydraulic system to flow aviation hydraulic oil into the actuating cavity, a buffer oil cavity for accommodating the aviation hydraulic oil is arranged in the actuating cavity, the pipe joint is communicated with a hydraulic pipeline in the actuating cavity, the actuating cavity is connected with a piston rod, a pressure release valve is arranged at the other end of the core rod, and a pressure release oil cavity is formed among the pressure release valve, the core rod and the lower end cover; and a sealing component is arranged on the piston rod. The invention has the functions of the landing gear buffer and the retraction actuator cylinder, effectively simplifies the functional parts of the landing gear system movement mechanism, and has reasonable and reliable structure.

Description

A buffer with telescopic function

technical field

The invention relates to the technical field of testing devices, in particular to a buffer with telescopic function.

Background technique

The landing gear buffer and the retractable actuator are important components of the aircraft landing gear structure. The buffer has the function of absorbing and dissipating the impact energy during the take-off and landing of the aircraft; the retractable actuator has the function of stretching under the hydraulic pressure. The out and in retract function drives the landing gear mechanism to retract and retract. According to the needs of the aircraft model, the buffer and the retractable actuator are arranged at the same time, and the space size is insufficient to meet the requirements of the aircraft model.

Contents of the invention

The technical problem solved by the present invention is to provide a buffer with a telescopic function to solve the problems in the background technology above.

The technical problem solved by the present invention adopts following technical scheme to realize:

A buffer with a telescopic function, including an outer cylinder, an inflation valve, a piston rod, an upper end cover, a floating piston, a pipe joint, a pressure relief valve, a lower end cover, a core rod, an air chamber, an actuating chamber, a buffer oil chamber and a discharge valve. Pressure oil chamber, wherein, one end of the outer cylinder is provided with an upper end cover, the other end of the outer cylinder is provided with a lower end cover, and the outer cylinder is provided with a floating piston for isolating the air chamber and the buffer oil chamber, and the core One end of the rod is installed on the upper end cover, passes through the floating piston and is placed in the air chamber and the buffer oil chamber; the outer cylinder is provided with an inflation valve for inflating the air chamber, which is used to connect the hydraulic system to actuate The cavity flows into the pipe joint of aviation hydraulic oil. The actuating cavity is provided with a buffer oil cavity for accommodating aviation hydraulic oil. The pipe joint is connected with the hydraulic pipeline in the actuating cavity. The actuating cavity and the piston Rod connection, the other end of the core rod is equipped with a pressure relief valve, and a pressure relief oil chamber is formed between the pressure relief valve, the core rod and the lower end cover; at the same time, a sealing assembly is arranged on the piston rod, through which the buffer The aviation hydraulic oil in the device is isolated from the aviation hydraulic oil flowing into the actuating chamber through the pipe joint.

In the present invention, the outer cylinder is provided with a plug for injecting aviation hydraulic oil into the buffer oil cavity.

In the present invention, the air cavity is filled with high-pressure nitrogen.

In the present invention, the sealing assembly includes a sealing ring.

In the present invention, the pressure relief valve is provided with a valve damping hole, and the core rod is provided with a core damping hole, and the aviation hydraulic oil flows from the pressure relief oil chamber into the buffer oil chamber through the valve damping hole and the core damping hole to form damping.

In the present invention, when installed on the fuselage, the air cavity faces upward and the oil cavity faces downward.

In the present invention, when in use, the air chamber is inflated to the rated pressure value through the inflation valve, and then the plug is opened to fill the buffer oil chamber with aviation hydraulic oil; the buffer oil chamber and the air chamber are completely separated by the floating piston; when working , the pipe joint is connected to the hydraulic system, the aviation hydraulic oil enters the actuating chamber to push the piston rod to retract, the pipe joint is connected to the hydraulic pipeline, and under the expansion of the high-pressure gas in the air chamber and the weight of the buffer itself, the piston rod is pushed out. The high-pressure gas in the air cavity provides the downward pressing force for the buffer; when the piston rod retracts, the aviation hydraulic oil passes through the valve damping hole of the pressure relief valve and the core damping hole of the core rod, and flows from the pressure relief oil chamber into the buffer oil chamber Damping is formed to absorb and dissipate structural impact energy; when the pressure in the pressure relief oil chamber is too high, the aviation hydraulic oil pushes the pressure relief valve and enters the buffer oil chamber to relieve pressure.

Beneficial effects: the present invention has the functions of the landing gear buffer and retractable actuating cylinder at the same time, effectively simplifies the functional parts of the moving mechanism of the landing gear system, thereby reducing the volume of the mechanism and the weight of the overall structure, and the structure is reasonable and reliable.

Description of drawings

Fig. 1 is a schematic structural diagram of a preferred embodiment of the present invention.

Fig. 2 is a cross-sectional view of a preferred embodiment of the present invention.

Detailed ways

In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific illustrations.

See Figures 1-2 for a buffer with telescopic function, including an outer cylinder 1, an inflation valve 2, a plug 3, a piston rod 4, an upper end cover 5, a floating piston 6, a pipe joint 7, a pressure relief valve 8, and a lower end cover 9. Core rod 10, air chamber 11, actuating chamber 12, buffer oil chamber 13 and pressure relief oil chamber 14, wherein, one end of the outer cylinder 1 is provided with an upper end cover 5, and the other end of the outer cylinder 1 is provided with a lower end Cover 9, the outer cylinder is provided with a floating piston 6 for isolating the air chamber 11 from the buffer oil chamber 13, and one end of the core rod 10 is installed on the upper end cover 5 and passes through the floating piston 6 and placed in the air chamber 11 In the buffer oil chamber 13; the outer cylinder 1 is provided with an inflation valve 2 for inflating the air chamber 11, a pipe joint 7 for connecting the hydraulic system to flow aviation hydraulic oil into the actuating chamber 12, and for The plug 3 of aviation hydraulic oil is injected into the buffer oil chamber 13, and the buffer oil chamber 13 for accommodating aviation hydraulic oil is arranged in the actuating chamber 12, and the pipe joint 7 is connected with the hydraulic pipeline in the actuating chamber 12 , the actuating chamber 12 is connected to the piston rod 4, the other end of the core rod 10 is installed with a pressure relief valve 8, and a pressure relief oil chamber 14 is formed between the pressure relief valve 8, the core rod 10 and the lower end cover 9 ; The piston rod 4 is provided with a sealing assembly, and the aviation hydraulic oil in the buffer is isolated from the hydraulic oil flowing into the actuating chamber 12 through the pipe joint 7 through the sealing assembly.

In this embodiment, the air cavity 11 is filled with high-pressure nitrogen.

In this embodiment, the buffer oil chamber 13 and the pressure relief oil chamber 14 are filled with No. 15 aviation hydraulic oil.

In this embodiment, the pressure relief valve 8 is provided with a valve damping hole, and the core rod 10 is provided with a core damping hole, and the aviation hydraulic oil flows into the buffer oil from the pressure relief oil chamber 14 through the valve damping hole and the core damping hole. The cavity 13 forms a damping so that the structural impact energy can be absorbed and dissipated.

In this embodiment, the sealing assembly includes a sealing ring.

In this embodiment, when installed on the fuselage, the air chamber 11 faces upward and the oil chamber faces downward.

In this embodiment, when in use, the air chamber 11 is inflated to the rated pressure value through the inflation valve 2, and then the plug 3 is opened to fill the buffer oil chamber 13 with No. 15 aviation hydraulic oil; The cavity and the air cavity are completely separated; when working, the pipe joint 7 is connected to the hydraulic system, the aviation hydraulic oil enters the actuating chamber 12 to push the piston rod 4 to retract, the pipe joint 7 is connected to the hydraulic pipeline, and the high-pressure gas in the air chamber 11 expands And under the weight of the buffer itself, the piston rod 4 is pushed out, and the high-pressure gas in the air cavity 11 provides a downward pressing force for the buffer; when the piston rod 4 retracts, the aviation hydraulic oil passes through the valve damping hole of the pressure relief valve 8 And the core damping hole of the core rod 10, from the pressure relief oil chamber 14 flows into the buffer oil chamber 13 to form damping, so as to absorb and dissipate the structural impact energy; when the pressure in the pressure relief oil chamber 14 is too high, the aviation hydraulic oil pushes the pressure relief The valve 8 enters the buffer oil chamber 13 for the purpose of pressure relief.

Claims (7)

1. A buffer with telescopic function, including an outer cylinder, an inflatable valve, a piston rod, an upper end cover, a floating piston, a pipe joint, a pressure relief valve, a lower end cover, a core rod, an air chamber, an actuating chamber, and a buffer oil chamber and a pressure relief oil chamber, characterized in that an upper end cover is provided at one end of the outer cylinder, a lower end cover is provided at the other end of the outer cylinder, and a floating piston for isolating the air chamber and the buffer oil chamber is arranged inside the outer cylinder One end of the core rod is installed on the upper end cover and passes through the floating piston and placed in the air chamber and the buffer oil chamber; the outer cylinder is provided with an inflation valve for inflating the air chamber, which is used to connect the hydraulic system A pipe joint that flows into the actuating chamber for aviation hydraulic oil, the actuating chamber is provided with a buffer oil chamber for accommodating aviation hydraulic oil, the pipe joint is connected with the hydraulic pipeline in the actuating chamber, and the actuating chamber The moving chamber is connected with the piston rod, and the other end of the core rod is equipped with a pressure relief valve, and a pressure relief oil chamber is formed between the pressure relief valve, the core rod and the lower end cover; meanwhile, a sealing assembly is arranged on the piston rod. 2. A buffer with telescopic function according to claim 1, characterized in that, the outer cylinder is provided with a plug for injecting aviation hydraulic oil into the buffer oil cavity. 3. The buffer with telescopic function according to claim 1, characterized in that the air chamber is filled with high-pressure nitrogen. 4. The shock absorber with telescopic function according to claim 1, characterized in that, the pressure relief valve is provided with a valve damping hole. 5. The shock absorber with telescopic function according to claim 1, characterized in that, the core rod is provided with a core damping hole. 6. The shock absorber with telescopic function according to claim 1, wherein the sealing assembly comprises a sealing ring. 7. A buffer with telescopic function according to any one of claims 1 to 6, characterized in that, when in use, the air chamber is inflated to the rated pressure value through the inflation valve, and then the plug is opened to release the buffer oil chamber The interior is filled with aviation hydraulic oil; the buffer oil chamber and the air chamber are completely separated by the floating piston; when working, the pipe joint is connected to the hydraulic system, the aviation hydraulic oil enters the actuating chamber to push the piston rod to retract, and the pipe joint is connected to the hydraulic pipeline , under the expansion of the high-pressure gas in the air cavity and the weight of the buffer itself, the piston rod is pushed out, and the high-pressure gas in the air cavity provides a downward pressing force for the buffer; when the piston rod retracts, the aviation hydraulic oil is released The valve damping hole of the valve and the core damping hole of the core rod flow from the pressure relief oil chamber into the buffer oil chamber to form damping, so as to absorb and dissipate the structural impact energy; when the pressure in the pressure relief oil chamber is too high, the aviation hydraulic oil pushes the unloading The pressure valve enters the buffer oil chamber for the purpose of pressure relief.

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