CN219388304U

CN219388304U - A scalable oil charge exhaust glib for hydrostatic actuator

Info

Publication number: CN219388304U
Application number: CN202223014568.8U
Authority: CN
Inventors: 高家宽; 曹永辉; 薛昌; 宋亚锋; 剡苏文
Original assignee: Xian Flight Automatic Control Research Institute of AVIC
Current assignee: Xian Flight Automatic Control Research Institute of AVIC
Priority date: 2022-11-11
Filing date: 2022-11-11
Publication date: 2023-07-21
Anticipated expiration: 2032-11-11

Abstract

The application provides a scalable oil charge exhaust nozzle for electro-hydrostatic actuator, include: an oil-filled exhaust housing; the telescopic ejector rod is arranged on the oil-filled exhaust shell and is communicated with the oil-filled exhaust shell; the detachable oil nozzle is arranged on the oil-filled exhaust shell and is communicated with the oil-filled exhaust shell; the telescopic ejector rod is connected with the oil-filled exhaust shell through threads; the detachable oil nozzle is detachably connected with the oil-filled exhaust shell; because the ejector rod is in threaded connection with the shell part, the ejector rod at the front end can horizontally extend out, the rear end of the ejector rod is provided with scales, and different scales can be set for the installation positions of different one-way valves; when the check valve is jacked up, oil does not flow out from the gap, and meanwhile, the check valve is externally connected with a hand valve, so that the oil filling and exhausting efficiency of the EHA is greatly improved.

Description

A scalable oil charge exhaust glib for hydrostatic actuator

Technical Field

The application belongs to the technical field of oil filling and exhausting of an electro-hydrostatic actuator, and particularly relates to a telescopic oil filling and exhausting nozzle for the electro-hydrostatic actuator.

Background

The Electro-hydrostatic actuator (Electro-hydrostatic Actuator, EHA) is a novel power telex actuator, and all main control surfaces of an advanced fighter adopt EHA. The large civil aircraft A380 also adopts EHA as an electric mode backup, thereby improving the reliability of the system. The electro-hydrostatic actuator adopts a positive displacement closed actuating system and does not depend on external oil sources, so that the oil filling and exhausting technology has great influence on the EHA performance. Becomes an important problem to be solved in the urgent need of developing EHA.

Aiming at the problem of oil filling and air exhausting, a plurality of one-way valves are adopted in key oil ways, and when oil filling, oil discharging and air exhausting are carried out, the one-way valves are jacked up by using the slender rod, and then the oil filling and air exhausting of the EHA are completed according to corresponding oil filling logic by externally connecting an oil pipe. The method of opening the one-way valve by using the ejector pin has three defects:

1. when EHA lets out oil, need the people to hold the elongate rod with hand and jack up the check valve, EHA exists great oil pressure this moment, can lead to the oil spout, causes personal danger to and environmental pollution, the security can not guarantee.

2. When oil is filled, an operator needs to operate the thimble to jack the one-way valve, and the oil pipe is connected as soon as possible to fill the oil, so that misoperation is easy, the oil filling efficiency is quite low, a plurality of hours are often required, and a plurality of people are required to cooperate.

3. When the long and thin rod is manually operated to jack the check valve, the check valve is easy to squeeze when the oil pipe is screwed in, so that the spring of the check valve is damaged, and in early use, the damage of the check valve occurs due to operation problems.

Disclosure of Invention

To above-mentioned technical problem, this application provides a scalable oil charge exhaust glib for hydrostatic actuator, includes:

an oil-filled exhaust housing;

the telescopic ejector rod is arranged on the oil-filled exhaust shell and is communicated with the oil-filled exhaust shell;

the detachable oil nozzle is arranged on the oil-filled exhaust shell and is communicated with the oil-filled exhaust shell;

the telescopic ejector rod is connected with the oil-filled exhaust shell through threads; the detachable oil nozzle is detachably connected with the oil-filled exhaust shell.

Preferably, the telescopic ejector rod comprises:

a flat ejector rod;

the cylindrical ejector rod is fixedly connected with the flat ejector rod; the cylindrical ejector rod is circumferentially grooved, and is also provided with external threads;

the outer hexagonal rod is fixedly connected with the cylindrical ejector rod; wherein, be provided with the scale on the outer hexagonal pole.

Preferably, the telescopic ejector rod comprises:

the movable sealing groove is arranged on the cylindrical ejector rod;

the rubber ring is arranged in the movable sealing groove; when oil is filled, the movable sealing groove and the rubber ring are used for sealing hydraulic oil.

Preferably, the oil-filled exhaust housing comprises:

an internal threaded hole matched with the external thread;

and the rear end hole and the movable sealing groove form a movable sealing surface.

Preferably, the oil-filled exhaust housing comprises:

the oil nozzle installation part is used for installing the detachable oil nozzle;

and the clamping part is used for tightening the oil-filled exhaust shell.

Preferably, the oil-filled exhaust housing further comprises:

an oil filter arranged at the oil nozzle mounting part; wherein, when oil is filled, the oil filter is used for filtering impurities of hydraulic oil.

The beneficial technical effect of this application:

because the ejector rod is in threaded connection with the shell part, the ejector rod at the front end can horizontally extend out, the rear end of the ejector rod is provided with scales, and different scales can be set for the installation positions of different one-way valves; in the moment of pushing up the check valve, oil does not flow out from the clearance, and an external hand valve is equipped with filling oil exhaust equipment simultaneously, improves EHA oil filling exhaust efficiency greatly, and man-hour reduces to 15 minutes from 3 hours before, promotes EHA oil filling, oil drain, exhaust efficiency and disposable success rate.

Drawings

Fig. 1 is a schematic structural diagram of a scalable oil-filled and air-vented nozzle provided in an embodiment of the present application;

fig. 2 is a schematic structural view of a telescopic ejector rod according to an embodiment of the present application;

fig. 3 is a schematic structural diagram of an oil-filled exhaust housing according to an embodiment of the present disclosure;

fig. 4 is a schematic structural view of a detachable nipple provided in an embodiment of the present application;

wherein: 1-telescopic ejector rod, 101-flat fine ejector rod, 102-slot, 103-dynamic seal groove, rubber ring, 104-external hexagonal rod, 2-oil-filling exhaust shell, 201-internal threaded hole, 202-rear end hole, 203-oil filter, 204-clamping part and 3-detachable oil nozzle.

Detailed Description

Referring to fig. 1-4, the application provides a scalable oil-filled and air-exhausting nozzle, which is applicable to various EHA oil-filled, has universality, can open one-way valves at different installation positions by a scalable thimble, and can seal oil by a dynamic sealing rubber ring at the rear end and a static sealing rubber ring at the front end at the moment of opening. The oil injection is avoided, the oil filling efficiency is greatly improved, and the personal safety and the environmental protection are ensured.

The telescopic oil-filled exhaust nozzle can be suitable for the check valves at different depth installation positions, the effective area of oil is ensured by the inner circumferential opening, and the adjustable rubber ring and threads extending out of the length of the ejector rod and the rear end can ensure that oil is not ejected from a gap when the check valve is jacked. Aims to improve the oil filling, oil discharging, exhaust efficiency and one-time success rate of the EHA, protect personal safety and improve environmental protection. Scalability ensures its versatility.

It should be noted that, the telescopic ejector rod is connected with the oil nozzle by adopting internal thread connection, circumferential slotting, ensuring the oil trafficability characteristic during oil filling and oil discharging, the thread can be screwed in and screwed out, ensuring the effective length of the ejector rod, and the one-way valves with different depths can be jacked up. The front-end slender rod adopts flat treatment, so that the tool can be conveniently clamped, the oil passing area in the one-way valve body is increased, and oil is not blocked. The thread grooving at the front end in the telescopic ejector rod ensures the oil passing area, so that the oil passing through the oil nozzle is convenient to be stopped when the oil is filled and discharged. Reasonable screw thread adds the rubber ring and seals, guarantees when rotatory glib talker, pushes up the instant of opening the check valve, and fluid does not flow from the clearance. The middle part of the oil nozzle is cut into two planes, and a wrench can be used for tightening the oil nozzle to ensure sealing. The telescopic rod can be screwed up to open the one-way valves with different depths, specific scales can be divided for different types of EHA, and meanwhile, the sealing rubber ring at the rear end can ensure dynamic sealing.

The application effectively improves the traditional EHA oil-filled exhaust method, the scalability guarantees that the application has universality, and the one-type scalable oil-filled exhaust nozzle can realize multi-type EHA oil-filled exhaust. This application can guarantee when rotatory rear end outer hexagonal pole, because ejector pin and casing part are threaded connection, consequently front end ejector pin can stretch out horizontally, and the ejector pin rear end has the scale, can set for different scales to the mounted position of different check valves. In the moment of pushing up the check valve, oil does not flow out from the clearance, and an external hand valve is equipped with filling oil exhaust equipment simultaneously, improves EHA oil filling exhaust efficiency greatly, and man-hour reduces to 15 minutes from 3 hours before, promotes EHA oil filling, oil drain, exhaust efficiency and disposable success rate.

In other embodiments of the present application, as shown in fig. 1, the telescopic oil-filled and air-filled nozzle consists of a telescopic ejector rod 1, an oil-filled and air-filled housing 2 and a detachable nozzle 3.

Wherein, as shown in fig. 2, the flat thin ejector rod 101 in the telescopic ejector rod ensures that the inside of the one-way valve is not blocked when the one-way valve is jacked up, and ensures the flow of oil liquid during oil filling and oil discharging. The slot 102 is a key part for connecting the telescopic rod and the oil-filled exhaust shell, and the circumferential slot can ensure enough effective area during oil filling, and the slot area is consistent with the area of the outlet hole of the oil nozzle. The oil is filled without throttling and pressure is not suppressed. The movable sealing groove and the rubber ring 103 of the third part are designed according to the AS4716 standard, so that the oil liquid is prevented from flowing out from the rear end when the ejector rod extends to the ejection one-way valve. The fourth part is an outer hexagonal rod 104, scales are arranged on the outer hexagonal rod, when the outer hexagonal rod is rotated, the front end ejector rod stretches out, the scales represent stretching distances, and different scales are set for the check valves at different installation positions.

As shown in fig. 3, the first part of the oil-filled and air-discharged shell is an internal threaded hole 201, which is matched with the grooved external thread of the telescopic ejector rod, and the second part of the oil-filled and air-discharged shell is a rear end hole 202, which is used for forming a dynamic sealing surface with the rear end sealing groove of the telescopic rod. The third part is an oil filter 203, which is used for filtering impurities of hydraulic oil when the oil is filled. The fourth part is a clamping part 204 for clamping the oil filled exhaust housing.

Wherein, as shown in fig. 4, the oil nozzle is detachable. Is used for connecting the oil filling pipe and the oil filling exhaust shell.

In actual use, the oil filling exhaust shell is screwed into the oil filling port of the EHA, the telescopic ejector rod is screwed into the oil filling exhaust shell, the screwing length can be adjusted by hand according to the depth of the actual one-way valve, the oil outflow condition of the detachable oil nozzle is observed during oil discharging, and the extending length of the ejector rod at the moment is recorded to correspond to the scale of the rear end of the telescopic ejector rod. When the device is used next time, the one-way valve can be directly jacked up in place by one step, and the purposes of rapid oil filling, oil discharging and air discharging are realized.

Claims

1. A retractable oil filled and vented nipple for an electro-hydrostatic actuator, comprising:

an oil-filled exhaust housing;

2. The telescopic oil filled exhaust nozzle for an electro-hydrostatic actuator of claim 1, wherein the telescopic ram comprises:

a flat ejector rod;

3. The telescopic oil filled exhaust nozzle for an electro-hydrostatic actuator of claim 2, wherein the telescopic ram comprises:

the movable sealing groove is arranged on the cylindrical ejector rod;

4. The retractable oil filled exhaust nozzle for an electro-hydrostatic actuator of claim 3, wherein said oil filled exhaust housing comprises:

an internal threaded hole matched with the external thread;

5. The retractable oil filled exhaust nozzle for an electro-hydrostatic actuator of claim 4, wherein said oil filled exhaust housing comprises:

and the clamping part is used for tightening the oil-filled exhaust shell.

6. The retractable oil filled exhaust nozzle for an electro-hydrostatic actuator of claim 5, wherein said oil filled exhaust housing further comprises: