CN212027947U

CN212027947U - Oil filtering return pipe for aircraft engine oil

Info

Publication number: CN212027947U
Application number: CN202020907168.1U
Authority: CN
Inventors: 李玮林
Original assignee: Laizhou Zhongwei Machinery Co ltd
Current assignee: Laizhou Zhongwei Machinery Co ltd
Priority date: 2020-05-26
Filing date: 2020-05-26
Publication date: 2020-11-27
Anticipated expiration: 2030-05-26

Abstract

The utility model discloses an aircraft engine oil filtering return pipe, which comprises an oil return pipeline and an oil return filter, wherein the oil return pipeline is internally provided with a suck-back prevention mechanism for preventing oil from sucking back, the joint of the oil return pipeline and an oil tank is provided with a pipeline joint, one side of the oil return filter is provided with an oil inlet joint for communicating with an engine fuel tank, one side of the oil return filter, which is far away from the oil inlet joint, is provided with an oil outlet joint, the oil outlet joint is connected with the oil return pipeline, the top of the oil return filter is provided with a seal cover, the inner cavity of the oil return filter is provided with a filter element for filtering oil, a filter cavity is arranged in the filter element, one side of the filter cavity, which is close to the oil inlet joint, is communicated with an oil return cavity, one side of the filter cavity, which is far, prevent oil return pipe jam and suck-back, extension aeroengine life.

Description

Oil filtering return pipe for aircraft engine oil

Technical Field

The utility model relates to an aeroengine technical field specifically is an aeroengine oil strains back oil pipe.

Background

An aircraft engine is a highly complex and precise thermal machine, and is an engine for providing power required by flying of an aircraft. The heart of the airplane is known as 'industrial flower', which directly affects the performance, reliability and economy of the airplane and is an important embodiment of national science and technology, industry and national defense strength.

Aeroengine is when using, the fuel pump spouts the fluid into the sprayer, the sprayer spouts the combustion chamber burning to quantitative oil, the fluid that burns out need be sent back to the oil tank through returning oil pipe and continue to use, contain a large amount of impurity in the fluid of backward flow, untimely clearance can cause back oil pipe to block up, influence aeroengine's use, need set up the filter at the time of returning oil pipe for this reason and get rid of impurity, the filter can resist the hydraulic shock of fluid simultaneously, prevent that the filter core damage from leading to returning oil pipe to block up, it should have good sealing performance to return oil pipe simultaneously, be favorable to aeroengine's use.

Aiming at the problems, the oil filter return pipe for the aircraft engine is good in filtering effect and capable of preventing the oil return pipe from being blocked and sucked backwards.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an aeroengine oil strains back oil pipe to solve the problem that proposes in the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme:

the utility model provides an aeroengine oil strains back oil pipe, includes oil return pipeline and oil return filter, be equipped with in the oil return pipeline and be used for preventing the suck-back mechanism of fluid suck-back, oil return pipeline is equipped with the pipe joint with the oil tank junction, oil return filter one side is equipped with the oil feed joint that is used for communicateing the engine fuel tank, one side that the oil feed joint was kept away from to the oil return filter is equipped with out oil joint, it connects oil return pipeline to go out oil joint, oil return filter top is equipped with the closing cap, oil return filter inner chamber is equipped with the filter core that is used for filtering fluid, be equipped with the filter chamber in the filter core, one side intercommunication oil return chamber that the filter chamber is close to the oil feed joint, one side that the oil.

Preferably, the suck-back prevention mechanism comprises a floating ball, the diameter of the floating ball is smaller than the inner diameter of the oil return pipeline, a filter screen is arranged on one side, close to the oil outlet end of the oil return pipeline, of the floating ball, a limiting sleeve is arranged on one side, away from the filter screen, of the floating ball, a sealing surface is arranged on one side, close to the floating ball, of the limiting sleeve, the sealing surface is of a conical structure matched with the surface of the floating ball, and the inner diameter of the limiting sleeve is smaller than.

Preferably, the pipeline joint includes flange, flange fixed connection oil return pipe, flange keeps away from oil return pipe's one side and is equipped with sealed the pad, oil return pipe cup joints the sheath near flange's one end outside, the sheath outside has cup jointed the lock nut who is used for oil return pipe to connect the oil tank interface.

Preferably, the oil outlet joint and the oil inlet joint are electrically connected with a differential pressure transmitter for detecting the pressure of oil at the inlet and the outlet of the oil return filter.

Preferably, the sealing washer is equipped with oil return filter junction to the closing cap, closing cap threaded connection fixing bolt, one side that oil return filter is close to the closing cap is equipped with the screw with fixing bolt matched with.

Preferably, the one-way overflow valve comprises a valve core, a control end of the valve core is electrically connected with a data output end of the differential pressure signal transmitter, and an overflow port of the one-way overflow valve is communicated with the fuel tank.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model discloses a set up and prevent suck-back mechanism, simple structure prevents that fluid from flowing into fluid suck-back behind the oil tank through returning oil pipe, avoids receiving the oil return in the aeroengine to influence and damages, guarantees the normal use of returning oil pipe.

By arranging the oil return filter, the oil liquid which is not burnt out can be filtered, so that impurities in the oil liquid are prevented from entering an oil tank through an oil return pipeline, the blockage of the oil return pipe is effectively avoided, the normal use of the aircraft engine is ensured, the service life of the aircraft engine is prolonged, and the oil return pipeline can return oil normally;

the oil return filter is convenient to disassemble and maintain, the sealing performance is good, and filtered oil enters an oil return pipeline for oil return, so that the normal use of the aircraft engine is ensured;

through setting up pressure differential signaling device and one-way overflow valve, can insert to detect the oil pressure of oil feed joint and the oil outlet joint department of oil return filter, can send a signal to report to the police when pressure differential surpasses the limited value, remind the staff in time to change the filter core, can send a signal to carry out overflow off-load for one-way overflow valve after pressure differential surpasses the limit value, prevent that oil feed pressure from too big causing the impact to the filter core, lead to the filter core to damage and make impurity get into the oil return pipeline, extension oil return filter's life.

Drawings

FIG. 1 is a schematic structural diagram of an aircraft engine oil return filter pipe.

Fig. 2 is a schematic structural diagram of a return oil filter in an aircraft engine oil return oil filter pipe.

FIG. 3 is a schematic structural diagram of a suck-back prevention mechanism in an oil filter return pipe of an aircraft engine.

FIG. 4 is a schematic structural diagram of a pipe joint in an aircraft engine oil return filter pipe.

FIG. 5 is an external structural diagram of an aircraft engine oil drain back pipe.

In the figure: 1-oil return pipeline, 2-pipeline joint, 201-connecting flange, 202-sealing gasket, 203-sheath, 204-locking nut, 3-oil return filter, 4-oil inlet joint, 5-oil outlet joint, 6-sealing cover, 7-suck-back prevention mechanism, 701-floating ball, 702-limiting sleeve, 703-filter screen, 8-fixing bolt, 9-filter element, 10-one-way overflow valve, 11-oil return cavity, 12-filter cavity.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-5, in an embodiment of the present invention, an oil filtering return pipe for an aircraft engine includes an oil return pipe 1 and an oil return filter 3, a suck-back prevention mechanism 7 for preventing oil from being sucked back is disposed in the oil return pipe 1, the suck-back prevention mechanism 7 includes a floating ball 701, a diameter of the floating ball 701 is smaller than an inner diameter of the oil return pipe 1, a filter screen 703 is disposed on a side of the floating ball 701 close to an oil outlet end of the oil return pipe 1, a stop collar 702 is disposed on a side of the floating ball 701 away from the filter screen 703, a sealing surface is disposed on a side of the stop collar 702 close to the floating ball 701, the inner diameter of the stop collar 702 is smaller than the diameter of the floating ball 701, when oil returns normally, the floating ball 701 is close to the filter screen oil by flowing pressure of the oil, when suck-back occurs in the oil 703, the floating ball 701 moves to, the floating ball 701 is in contact with the sealing surface, the sealing surface is attached to the surface of the floating ball 701, oil can be prevented from flowing to one side, close to the limiting sleeve 702, of the floating ball 701, accordingly, the oil is prevented from being sucked reversely and flowing into an aircraft engine to cause damage, the suck-back prevention mechanism 7 is simple in structure, and normal use of the oil return pipeline 1 can be guaranteed.

The utility model discloses a fuel return pipe 1, including oil tank interface, oil return pipe 1, pipe joint 2, flange 201 fixed connection oil return pipe 1, flange 201 keeps away from one side of oil return pipe 1 and is equipped with sealed 202, the one end outside that oil return pipe 12 is close to flange 201 cup joints sheath 203, the sheath 203 outside has cup jointed the lock nut 204 that is used for oil return pipe 1 to connect the oil tank interface, flange 201 connects the oil tank interface, sealed 202 that has good sealed effect, it is further sealed to be connected the locking through the lock nut 204 with the matched with retaining member of oil tank interface, guarantees the leakproofness behind the oil return pipe 1 connection, is favorable to aeroengine's use.

An oil inlet joint 4 used for communicating an engine fuel tank is arranged on one side of the oil return filter 3, an oil outlet joint 5 is arranged on one side, away from the oil inlet joint 4, of the oil return filter 3, the oil outlet joint 5 is connected with an oil return pipeline 1, a sealing cover 6 is arranged on the top of the oil return filter 3, a sealing ring is arranged at the joint of the sealing cover 6 and the oil return filter 3, the sealing cover 6 is in threaded connection with a fixing bolt 8, a screw hole matched with the fixing bolt 8 is formed in one side, close to the sealing cover 6, of the oil return filter 3, the sealing cover 6 is convenient to disassemble, good sealing performance is achieved after installation, and normal use of the oil return;

the oil return filter 3 is characterized in that a filter element 9 for filtering oil is arranged in an inner cavity of the oil return filter 3, a filter cavity 12 is arranged in the filter element 9, one side, close to the oil inlet joint 4, of the filter cavity 12 is communicated with an oil return cavity 11, the oil outlet joint 5 and the oil inlet joint 4 are electrically connected with a differential pressure transmitter for detecting the oil pressure at an inlet and an outlet of the oil return filter 3, one side, far away from the oil return cavity 11, of the filter cavity 12 is provided with a one-way overflow valve 10 for adjusting the oil pressure difference between the inlet oil and the outlet oil, the one-way overflow valve 10 comprises a valve core, a control end of the valve core is electrically;

during the in-service use, the fluid that unburnt up gets into oil return cavity 11 through the oil feed joint and flows into filter chamber 12 and filters, and fluid filters the back through filter core 9, gets into oil return pipeline 1 oil return through oil outlet joint 5 and flows into the oil tank, and when the fluid pressure difference between oil feed joint 4 and the oil outlet joint 5 exceeded the limited value of pressure difference signaling apparatus, pressure difference signaling apparatus can send signal and report to the police, reminds staff in time to change filter core 9, can send signal after the pressure difference surpassed the limited value and carry out the off-load for one-way overflow valve 10 and discharge unnecessary fluid, prevents that oil feed pressure is too big to cause the impact to filter core 9, avoids filter core 9 to damage and makes impurity get into oil return pipeline 1, prolongs the life of oil return filter 3, prevents simultaneously that oil return pipeline 1 from.

The utility model discloses a theory of operation is: when the aircraft engine oil is used for filtering an oil return pipe, the oil inlet end of an oil return pipeline 1 is connected with an oil outlet joint 5, the oil outlet end is connected with an oil tank interface through a pipeline joint 2, the oil inlet joint 4 is connected with an oil return port of an internal fuel tank of an engine, oil which is not burnt out enters a filter cavity 12 through the oil inlet joint 4 to be filtered, flows into the oil tank through the oil outlet joint 5 after flowing into the oil return pipeline 1 to be continuously used, the suck-back prevention mechanism 7 can prevent the oil in the oil tank from sucking back, and when the pressure difference between the oil inlet joint 4 and the oil outlet joint 5 exceeds a limited value, the pressure difference communicator can send a signal to alarm to remind a worker to replace a filter element 9 in time, and send the signal to an one-way overflow valve 10 to carry out overflow unloading to remove excessive oil simultaneously, so.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. The utility model provides an aeroengine oil strains oil return pipe, includes oil return pipeline (1) and oil return filter (3), its characterized in that: an anti-suck-back mechanism (7) for preventing the oil from sucking back is arranged in the oil return pipeline (1), a pipeline joint (2) is arranged at the joint of the oil return pipeline (1) and the oil tank, an oil inlet joint (4) used for communicating the fuel tank of the engine is arranged at one side of the oil return filter (3), an oil outlet joint (5) is arranged on one side of the oil return filter (3) far away from the oil inlet joint (4), the oil outlet joint (5) is connected with an oil return pipeline (1), the top of the oil return filter (3) is provided with a sealing cover (6), the inner cavity of the oil return filter (3) is provided with a filter element (9) for filtering oil, be equipped with filter chamber (12) in filter core (9), one side intercommunication oil return chamber (11) that filter chamber (12) are close to oil feed joint (4), one side that oil return chamber (11) were kept away from in filter chamber (12) is equipped with one-way overflow valve (10) that are used for adjusting into out oil hydraulic pressure difference.

2. The aircraft engine oil drainback pipe according to claim 1, wherein: the anti-suck-back mechanism (7) comprises a floating ball (701), the diameter of the floating ball (701) is smaller than the inner diameter of the oil return pipeline (1), a filter screen (703) is arranged on one side, close to the oil return pipeline (1), of the floating ball (701) at the oil outlet end, a limiting sleeve (702) is arranged on one side, away from the filter screen (703), of the floating ball (701), a sealing surface is arranged on one side, close to the floating ball (701), of the limiting sleeve (702), the sealing surface is arranged to be in a conical structure matched with the surface of the floating ball (701), and the inner diameter of the limiting sleeve (702) is smaller than the diameter of.

3. The aircraft engine oil drainback pipe according to claim 1, wherein: pipeline joint (2) are including flange (201), flange (201) fixed connection oil return pipe way (1), flange (201) keep away from one side of oil return pipe way (1) and are equipped with sealed pad (202), the one end outside that oil return pipe way (1) are close to flange (201) cup joints sheath (203), the lock nut (204) that are used for oil return pipe way (1) to connect the oil tank interface have been cup jointed in sheath (203) outside.

4. The aircraft engine oil drainback pipe according to claim 1, wherein: the oil outlet joint (5) and the oil inlet joint (4) are electrically connected with a differential pressure signal transmitter for detecting the pressure of oil at the inlet and the outlet of the oil return filter (3).

5. The aircraft engine oil drainback pipe according to claim 1, wherein: the sealing ring is arranged at the joint of the sealing cover (6) and the oil return filter (3), the sealing cover (6) is in threaded connection with the fixing bolt (8), and a screw hole matched with the fixing bolt (8) is formed in one side, close to the sealing cover (6), of the oil return filter (3).

6. The aircraft engine oil drainback pipe according to claim 4, wherein: the one-way overflow valve (10) comprises a valve core, the control end of the valve core is electrically connected with the data output end of the differential pressure signal transmitter, and the overflow port of the one-way overflow valve (10) is communicated with the fuel tank.