CN112024535A

CN112024535A - Cylinder seat cleaning system of aircraft brake device

Info

Publication number: CN112024535A
Application number: CN202010652036.3A
Authority: CN
Inventors: 何永乐; 马建峰; 赵文庆
Original assignee: Xian Aviation Brake Technology Co Ltd
Current assignee: Xian Aviation Brake Technology Co Ltd
Priority date: 2020-07-08
Filing date: 2020-07-08
Publication date: 2020-12-04
Anticipated expiration: 2040-07-08
Also published as: CN112024535B

Abstract

The embodiment of the invention discloses a cylinder seat cleaning system of an aircraft brake device, which comprises: the cleaning hydraulic subsystem and the cleaning tool are connected; an oil supply port and an oil return port of a hydraulic interface in the cleaning hydraulic subsystem are connected with a cleaning tool and used for providing oil for cleaning for the cleaning tool; the cleaning tool is fixedly arranged on the cleaned cylinder seat and used for providing oil path selection for the cylinder seat, so that oil flows through the hole cavity of the cylinder seat one by one, and the cleaning of the oil path section by section of the inner cavity is realized; wherein, the washing liquid pressure subsystem includes: the device comprises a main pump source oil supply module, a pulsating hydraulic generator module, an output module and an oil return module; the cleaning tool comprises an adapter, a fixing plate, a pressing plate, a bolt, a switch and a collecting pipe. The embodiment of the invention aims at the problem that the existing product assembly test can not meet the technical requirements of product delivery and installation, improves the cleaning effect, improves the operation efficiency and is more convenient to operate, so that the product assembly test meets the technical requirements of product delivery and installation.

Description

Cylinder seat cleaning system of aircraft brake device

Technical Field

The application relates to the technical field of cleaning of inner cavities of airplane wheel brake devices, in particular to a cylinder seat cleaning system of an airplane brake device.

Background

The disc brake device is one of the airplane wheel brake devices widely used in the current airplane, and the cylinder seat is one of the main components of the brake device. From the hydraulic transmission perspective, the cylinder block is an integration of a plurality of actuating cylinders, and is usually provided with 6-10 pistons for driving a brake disc to perform friction braking. The cylinder block is basically an annular plate having a plurality of piston bores uniformly arranged around a center on one side, the piston bores being in communication with each other through an internal oil passage. For castings, the cylinder block internal oil passage is a cast annular pore passage, and for forgings, the cylinder block internal oil passage is a machined and drilled polygonal pore passage. The cylinder base is provided with an oil inlet hydraulic interface, namely an oil inlet, which is crosslinked with the outside, and the oil inlet is connected with an aircraft brake system through a filler neck and used for supplying oil pressure to the cylinder base. The cylinder seat oil inlet is positioned on the end surface of the cylinder seat or positioned on the side surface of the periphery of the cylinder seat. The cylinder block is also provided with an exhaust port which is required for exhausting and discharging oil. The exhaust port is generally disposed on the side of the periphery of the brake device at a higher position of the cylinder block, and also disposed on the end face of the cylinder block. When braking, the piston installed in the piston hole of the cylinder base extends out under the action of hydraulic force to push the pressing disc to move axially, so that the movable disc, the static disc and the bearing disc are pressed together to generate friction torque, and the purpose of braking the airplane wheel is achieved. The braking pressure is relieved, the piston resets under the action of the return spring, the movable disc and the static disc are separated, and the wheel loosens the brake.

Because the aircraft brake device is a dead chamber in a hydraulic brake system, hydraulic oil can not form closed-loop oil return circuit circulation, residues such as aluminum scraps and dirt in the oil on the surface of a cylinder seat inner chamber (a chamber formed by a piston hole and a pore passage communicated with the piston hole) are harmful to the aircraft brake system using the electro-hydraulic servo valve, and the aircraft brake device is recognized from use practice to be brought into a hydraulic pollution treatment range, and the inner chamber of a product needs to be cleaned before a host machine and an installation machine are delivered. The prior art has the defects that no cylinder seat inner cavity cleaning system for an airplane brake device exists, and the product assembly test cannot meet the technical requirements of product delivery and installation. In the case of no special cleaning equipment, the cleaning operation is usually carried out by using an airplane brake performance test bed. The method specifically comprises the steps of connecting an oil inlet of the airplane brake device with an oil inlet pipeline, connecting an exhaust port of the brake device with an oil return pipeline, performing brake-release brake circulation of pressurizing and releasing for a certain number of times, and then performing oil circulation. The cleaning mode for the cylinder seat in the aircraft brake device is low in cleaning efficiency and poor in cleaning effect, and even if the oil liquid circulation time is prolonged, the technical requirement cannot be met, and dirt in the inner cavity of the cylinder seat cannot be thoroughly washed out because the oil liquid circulates and flows out from one fixed opening. In addition, the oil sampling operation is inconvenient, the pipe joint is difficult to detach, the oil leakage is avoided, the environment is polluted, the sampling is possibly polluted, and the cleaning result is easy to detect and misjudge.

Disclosure of Invention

In order to solve the technical problems, the embodiment of the invention provides a cylinder seat cleaning system of an aircraft brake device, which aims to solve the problem that a product assembly test cannot meet the technical requirements of product delivery and assembly in use due to the fact that a special cleaning system for cleaning the cylinder seat of the aircraft brake device is not available in the prior art.

The embodiment of the invention provides a cylinder seat cleaning system of an aircraft brake device, which comprises: the cleaning hydraulic subsystem and the cleaning tool (34) are connected;

an oil supply port and an oil return port of a hydraulic interface in the cleaning hydraulic subsystem are connected with a cleaning tool and used for providing oil for cleaning for the cleaning tool;

the cleaning tool (34) is fixedly arranged on a cleaned cylinder seat (49) and used for providing oil path selection for the cleaned cylinder seat (49), so that oil flows through the hole cavity of the cylinder seat one by one, and the cleaning of the oil path section by section of the inner cavity is realized;

wherein the wash hydraulic subsystem comprises: the device comprises a main pump source oil supply module, a pulsating hydraulic generator module, an output module and an oil return module;

the main pump source fuel supply module includes: the hydraulic system comprises an oil tank (1) for storing oil, an oil pump (3) for providing hydraulic pressure and flow for cleaning a hydraulic subsystem, an oil filter (2) for filtering dirt in hydraulic oil entering the oil pump (3), a pressure regulating valve (6), a first switch (14) and a second switch (17); an oil inlet of an oil pump (3) is connected with an oil tank (1) through an oil filter (2) in a pipeline manner, an oil outlet of the oil pump (3) is connected with an oil inlet of a pressure regulating valve (6) through an oil pump outlet one-way valve (4) in a pipeline manner, an oil return port of the pressure regulating valve (6) is connected with the oil tank (1) through a pressure regulating switch (7) in a pipeline manner, an oil outlet of the pressure regulating valve (6) is connected with an oil inlet of a two-position four-way electromagnetic valve (22) through a first switch (14) and a second switch (17) in a pipeline manner, and the pressure regulating valve (6) and the pressure;

the pulsating hydraulic generator module is connected in parallel with a second switch (17) and comprises: a pulsation hydraulic pressure generator (18) and a pulsation hydraulic pressure generator switch (16) connected; the pulsating hydraulic generator module is used for controlling oil supply or oil cut-off of the pulsating hydraulic generator (18) through a second switch (17), when the pulsating hydraulic generator (18) is used, the second switch (17) is in a closed position, and the pulsating hydraulic generator switch (16) is in an open position;

the output module includes: a two-position four-way solenoid valve (22) outputting a first switch (32), a second switch (33) and a short-circuit switch (24); an oil inlet of the two-position four-way electromagnetic valve (22) is connected with an output end pipeline of the second switch (17), an oil return port of the two-position four-way electromagnetic valve is communicated with the oil tank (1) through an oil return switch (27), an oil return electromagnetic valve (30) and an oil return filter (31), a first load port of the two-position four-way electromagnetic valve (22) is connected with a cleaning tool (34) through an output first switch (32) through a pipeline, and a second load port is connected with the cleaning tool (34) through an output second switch (33) through a pipeline; the two-position four-way electromagnetic valve (22) is used for controlling the direction of hydraulic oil flowing into and out of a cleaned cylinder seat (49), when the two-position four-way electromagnetic valve is not electrified, the output short-circuit switch (24) is connected to the first load port pipeline and the second load port pipeline in parallel and used for communicating the first load port with the second load port pipeline of the two-position four-way electromagnetic valve (22), and the output first switch (32) and the output second switch (33) are in a closed position when the output short-circuit switch (24) is in an open state;

the oil return module comprises: an oil return switch (27), an oil return electromagnetic valve (30) and an oil return filter (31); the input end of an oil return switch (27) is connected with an oil return opening pipeline of the two-position four-way electromagnetic valve (22), the output end of the oil return switch is connected with an oil inlet pipeline of an oil return electromagnetic valve (30), and the oil outlet of the oil return electromagnetic valve (30) is communicated to an oil tank (1) through an oil return filter (31); the oil return switch (27) and the oil return electromagnetic valve (30) are used for controlling oil return and adjusting oil return pressure, and the oil return filter (31) is used for filtering dirt in oil return liquid.

Optionally, in the cylinder block washing system for an aircraft brake device as described above, the washing hydraulic subsystem further includes: the auxiliary pump source oil supply module and the oil sampling module;

the auxiliary pump source oil supply module comprises: a hand pump (8) and a hand pump outlet one-way valve (9); an oil inlet of the hand pump (8) is connected with an oil tank (1) through an oil filter (2) by a pipeline, and an oil outlet of the hand pump (8) is connected with an oil outlet of the pressure regulating valve (6) by a pipeline through a hand pump outlet one-way valve (9); the auxiliary pump source oil supply module is used for manual cleaning and connection sealing inspection of a cleaning tool (34) before cleaning;

the fluid sampling module includes: a first sampler section and a second sampler section; the first sampler section includes: the input end of the first sampler switch (20) is connected with the output end of the second switch (17) through a pipeline, the oil inlet of the first sampler switch (20) is connected with the first sampler (21) through a pipeline at the output end of the first sampler switch (20), and the oil outlet of the first sampler (21) is connected with the oil tank (1) through a pipeline; the second sampler section includes: the second sampler switch (26) with the input end connected on a pipeline between the oil return port of the two-position four-way electromagnetic valve (22) and the oil return switch (27), the second sampler (28) with the oil inlet connected with the pipeline at the output end of the second sampler switch (26), and the second sampler one-way valve (29) connecting the oil outlet of the second sampler (28) to the pipeline at the output end of the oil return switch (27).

Alternatively, in the cylinder block washing system for an aircraft brake device as described above,

the through flow direction of the oil pump outlet one-way valve (4) is the outflow direction of an oil outlet of the oil pump (3), and the oil pump outlet one-way valve (4) is used for preventing hydraulic oil from flowing back to the oil pump (3);

the flow direction of the hand pump outlet one-way valve (9) is the outflow direction of an oil outlet of the hand pump (8), and the hand pump outlet one-way valve (9) is used for preventing hydraulic oil from flowing back to the hand pump (8);

the opening direction of the second sampler one-way valve (29) is along the outflow direction of an oil outlet of the second sampler (28), and the second sampler one-way valve (29) is used for preventing return oil of the cleaning liquid hydraulic subsystem from flowing backwards into the second sampler (28).

Optionally, in the cylinder seat cleaning system for an aircraft brake device as described above, in the pulsating hydraulic pressure generator module,

the pulsating hydraulic pressure generator (18) includes: the oil inlet P of the proportional solenoid valve (36) is connected with a pipeline of a pulsation hydraulic generator switch (16), the oil outlet L is connected with a pipeline of the output end of the second switch (17), and the oil return port R is connected with a pipeline of the oil tank (1); the proportional solenoid valve (36) is electrically connected with the controller (35), and the controller (35) is used for sending a pulsating current signal to the proportional solenoid valve (36) so that the proportional solenoid valve (36) outputs pulsating hydraulic pressure according to the pulsating current signal; alternatively, the first and second electrodes may be,

the pulsating hydraulic pressure generator (18) includes: the oil inlet P of the electro-hydraulic servo valve (37) is connected with a pipeline of a pulsation hydraulic generator switch (16), the oil outlet L is connected with a pipeline of the output end of the second switch (17), and the oil return port R is connected with a pipeline of the oil tank (1); the electro-hydraulic servo valve (37) is electrically connected with the controller (35), and the controller (35) is used for sending a pulsating current signal to the electro-hydraulic servo valve (37) so that the electro-hydraulic servo valve (37) outputs pulsating hydraulic pressure according to the pulsating current signal; alternatively, the first and second electrodes may be,

the pulsating hydraulic pressure generator (18) includes: an oil inlet P1 of the electromagnetic valve (39) is connected with a pipeline of a pulsation hydraulic generator switch (16), and an oil outlet P2 is connected with a pipeline of an output end of a second switch (17); the electromagnetic valve (39) is electrically connected with the relay (38), and the relay (38) is used for sending an on-off pulsating current signal to the electromagnetic valve (39) so that the electromagnetic valve (39) outputs pulsating hydraulic pressure according to the pulsating current signal; alternatively, the first and second electrodes may be,

the pulsating hydraulic pressure generator (18) includes: a relay (38), a hydraulic electro-valve (40), a pressure reducer (41) and a pressure reducer switch (42); an oil inlet of the pressure reducer (41) is connected with an output end of the pressure reducer switch (42) and is connected with a pipeline of the pulsation hydraulic generator switch (16) through the pressure reducer switch (42), an oil outlet of the pressure reducer (41) is connected with a pipeline of a first oil inlet P3 of the electro-hydraulic valve (40), a second oil inlet P4 of the electro-hydraulic valve (40) is connected with a pipeline of an input end of the pressure reducer switch (42) and is connected with a pipeline of the pulsation hydraulic generator switch (16), and an oil outlet P2 of the electro-hydraulic valve (40) is connected with a pipeline of an output end of the second switch (17); the electrohydraulic valve (40) is electrically connected to a relay (38), and the relay (38) is used for sending an on-off pulsating current signal to the electromagnetic valve (39), so that the electromagnetic valve (39) outputs pulsating hydraulic pressure according to the pulsating current signal.

Optionally, in the cylinder block washing system of an aircraft brake device as described above, the main pump source oil supply module further comprises at least one of the following configurations:

a pressure accumulator (5) is arranged on a pipeline between an oil outlet of the oil pump (3) and an oil inlet of the pressure regulating valve (6) and is used for stabilizing pressure and reducing vibration;

a pipeline between the first switch (14) and the second switch (17) is provided with a precision oil filter (15), and the filtering precision of the precision oil filter (15) is 3-10 microns and is used for filtering fine dirt in oil;

the oil outlet of the pressure regulating valve (6) is connected with the oil tank (1) through an overflow valve (10) in a pipeline manner and is used for timely unloading when the pressure of the oil outlet of the oil pump (3) is overhigh so as to prevent the oil pump (3) from being damaged and parts of a hydraulic subsystem from being cleaned;

a first pressure gauge (11) is arranged on an oil outlet pipeline of the pressure regulating valve (6), and a second pressure gauge (19) is arranged on an output end pipeline of the second switch (17) and used for indicating the hydraulic pressure of the oil supply pipeline;

the device is provided with a flowmeter (13) and a flowmeter switch (12) which are connected with the first switch (14) in parallel, the input end of the flowmeter (13) is connected with an oil outlet pipeline of the pressure regulating valve (6) through the flowmeter switch (12), and the output end of the flowmeter is connected with the output end of the first switch (14).

Optionally, in the cylinder block washing system of an aircraft brake device as described above, the oil return module further includes at least one of:

an oil return pressure gauge (23) arranged on a pipeline between an oil return port of the two-position four-way electromagnetic valve (22) and the oil return switch (27) and used for indicating oil return pressure;

the oil inlet of the back pressure actuating cylinder (25) is connected to a pipeline between an oil return port of the two-position four-way electromagnetic valve (22) and an oil return switch (27).

the cleaning hydraulic subsystem is used for turning off the first output switch (32) and the second output switch (33), turning on the output short-circuit switch (24), turning off the oil return switch (27), turning on the oil return electromagnetic valve (30), turning on the second sampler switch (26) under the condition of cutting off the hydraulic load, and sampling oil of the cleaning hydraulic subsystem to check the pollution degree of the oil return hydraulic oil of the cleaning hydraulic subsystem.

the cleaning hydraulic subsystem is also used for closing the output short-circuit switch (24) when the output first switch (32) and the output second switch (33) are opened, closing the oil return switch (27), opening the oil return electromagnetic valve (30) and opening the second sampler switch (26) under the condition of switching on the hydraulic load, and sampling oil flowing through the inner cavity of the cleaned cylinder seat (49) so as to check the pollution degree of the hydraulic oil in the inner cavity of the cleaned cylinder seat (49).

Optionally, in the cylinder block cleaning system for an aircraft brake device as described above, the cleaning tool (34) includes: the device comprises an adapter (43), a fixing plate (44), a pressing plate (45), a bolt (46), a switch (47) and a collecting pipe (48);

the number of the adapter joints (43) is the same as that of piston holes in a cleaned cylinder base (49) and that of switches (47) used for controlling the adapter joints (43), the adapter joints (43) are mounted in the piston holes of the cleaned cylinder base (49) and used for connecting the piston hole cavities to a pipeline of a collecting pipe (48), the adapter joints (43) are fixed on the cleaned cylinder base (49) through fixing plates (44), pressing plates (45) and bolts (46), and ports of the adapter joints (43) are connected with the pipeline of the collecting pipe (48) through the switches (47);

and a first load port and a second load port in an output module of the cleaning hydraulic subsystem are respectively connected with a cylinder seat oil inlet (50) of a cleaned cylinder seat (49) and a collecting pipe (48) of a cleaning tool (34).

10. The cylinder block washing system of an aircraft brake device according to claim 9, characterized in that the washing tool (34) further comprises: a cylinder seat exhaust port (51) of a cleaned cylinder seat (49) is connected with a pipeline of a collecting pipe (48) through a switch (47);

the cylinder block cleaning system further comprises: a washing rack for placing a cylinder block (49) to be washed, the washing rack comprising a rack plate (52) and legs (53).

According to the cylinder seat cleaning system of the aircraft brake device, provided by the embodiment of the invention, through reasonably setting the pressure supply part (namely the cleaning hydraulic subsystem) and the cleaning tool, the defect that the cleaning system of the inner cavity of the cylinder seat of the aircraft brake device is absent in the prior art is overcome, the requirement that cleaning equipment is lacked in an assembly test in product production is solved, and the assembled aircraft brake device product meets the technical requirements of product delivery and assembly use; the cleaning tool is adopted to force the oil to flow through each section of oil duct of the cylinder base, so that the washing and cleaning mode that the cleaning liquid mainly flows through a local oil duct between an oil inlet and an exhaust port of the cylinder base in the prior art is changed, the inner cavity of the cylinder base is cleaned without dead angles, and the pollution source of the inner cavity of the cylinder base is thoroughly eliminated. The pressure supply part (namely the cleaning hydraulic subsystem) in the embodiment of the invention has constant pressure supply and can also provide pulsating pressure supply, and the cleaning machine can be used for unidirectional cleaning and reversing cleaning and can adapt to different cleaning operation requirements; a special liquid sampler is arranged for cleaning effect inspection, so that the test and inspection are convenient; the special cleaning hydraulic subsystem provided by the embodiment of the invention has the functions of switching oil paths, controlling pressure, flow, sampling oil and the like, is convenient to operate, can complete the cleaning operation of the inner cavity of the cylinder base of the existing various types of airplane brake devices, ensures the cleaning of the inner cavity of the cylinder base, and meets the pollution control requirement of an airplane brake system. The cylinder seat cleaning system in the embodiment of the invention has simple and reasonable structure, high cleaning efficiency, simple and convenient operation and obvious technical and economic use benefits, is cleaned by a brake device performance test bed in the past, not only is the operation and the disassembly troublesome, but also the cleaning effect is poor, some products can be repeatedly cleaned for a plurality of days even if the time is prolonged, the time and the energy are consumed, the labor is wasted, and the pollution control requirement of the inner cavity of the cylinder seat can not be met.

Drawings

The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the example serve to explain the principles of the invention and not to limit the invention.

FIG. 1 is a schematic structural diagram of a cylinder block cleaning system of an aircraft brake device according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a cleaning hydraulic subsystem of a cylinder block cleaning system of an aircraft brake apparatus according to an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a cleaning tool in a cylinder block cleaning system of an aircraft brake device according to an embodiment of the present invention;

FIG. 4 is a schematic diagram of a pulsating hydraulic generator in the cleaning hydraulic subsystem in accordance with an embodiment of the present invention;

FIG. 5 is a schematic diagram of an alternative pulsating hydraulic pressure generator in the cleaning hydraulic subsystem in accordance with an embodiment of the present invention;

FIG. 6 is a schematic diagram of a still further pulsating hydraulic generator in the cleaning hydraulic subsystem in accordance with an embodiment of the present invention;

FIG. 7 is a schematic diagram of a still further pulsating hydraulic generator in the cleaning hydraulic subsystem in accordance with an embodiment of the present invention;

fig. 8 is a schematic structural diagram of an adapter in the cleaning tool according to the embodiment of the present invention;

fig. 9 is a schematic structural diagram of another adapter in the cleaning tool according to the embodiment of the present invention;

fig. 10 is a schematic structural diagram of a fixing plate in the cleaning tool according to the embodiment of the invention;

FIG. 11 is a schematic structural diagram of a platen in the cleaning tool according to an embodiment of the present invention;

FIG. 12 is a schematic structural diagram of another platen in the cleaning tool according to the embodiment of the invention;

FIG. 13 is a schematic structural diagram of another platen in the cleaning tool according to the embodiment of the present invention;

FIG. 14 is a schematic diagram of a cleaning support of the cylinder block cleaning system according to the present invention;

fig. 15 is a three-dimensional structure view of the cleaning stent of fig. 14.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict.

Because there is not the special cleaning system who is used for wasing aircraft brake cylinder seat among the prior art, the washing operation is usually gone on by virtue of aircraft brake device performance test platform to the aforesaid is to aircraft brake device's washing mode, and the cleaning performance is poor, and cleaning efficiency is low, consequently, need provide an aircraft brake device's cylinder seat cleaning system at present urgently to improve the cleaning performance, improve the operating efficiency and more convenient operation, the time technical requirement that the product assembly test satisfied the product and dispatched from the factory and install the use.

The technical approach for solving the technical problem of the invention is as follows: and constructing a cleaning hydraulic subsystem and a cleaning tool to form a cylinder seat cleaning system of the airplane brake device. The cleaning hydraulic subsystem provides a required oil source, comprises a pulsating pressure source, an oil sampler and a reversing cleaning control device, namely an electromagnetic valve; the cleaning tool provides oil path selection, and forces oil to flow through the hole cavity of the cylinder seat one by one, so that cleaning without dead angles is realized.

The following specific embodiments of the present invention may be combined, and the same or similar concepts or processes may not be described in detail in some embodiments.

Fig. 1 is a schematic structural diagram of a cylinder block cleaning system of an aircraft brake device according to an embodiment of the present invention. As shown in fig. 1, a cylinder block cleaning system of an aircraft brake device according to an embodiment of the present invention includes: the cleaning hydraulic subsystem and the cleaning tool 34 are connected.

In the cylinder seat cleaning system of the aircraft brake device shown in fig. 1, an oil supply port and an oil return port of a hydraulic interface in a cleaning hydraulic subsystem are connected with a cleaning tool for supplying oil for cleaning to the cleaning tool;

the cleaning tool 34 is fixedly installed on the cylinder base to be cleaned and used for providing oil path selection for the cylinder base, so that oil flows through the hole cavity of the cylinder base one by one, and the oil path cleaning of the inner cavity section by section is realized.

Fig. 2 is a schematic structural diagram of a cleaning hydraulic subsystem in a cylinder block cleaning system of an aircraft brake device according to an embodiment of the present invention. As shown in fig. 2, the cleaning hydraulic subsystem in the embodiment of the present invention may include: the device comprises a main pump source oil supply module, a pulsation hydraulic generator module, an output module and an oil return module.

In the structure of the hydraulic subsystem for cleaning as shown in fig. 2, the main pump source oil supply module in the embodiment of the present invention includes: the oil pump comprises an oil tank 1, an oil filter 2, an oil pump 3, a pressure regulating valve 6, a first switch 14 and a second switch 17. In the module, an oil tank 1 is used for storing hydraulic oil and providing an oil source for an oil pump 3; the oil pump 3 is driven by an electric motor to provide the required hydraulic pressure and flow to the subsystem. In the module, an oil inlet of an oil pump 3 is connected with a pipeline of an oil tank 1, an oil outlet of the oil pump 3 is connected with an oil inlet pipeline of a pressure regulating valve 6 through an oil pump outlet one-way valve 4, and an oil filter 2 is connected on the pipeline between the oil inlet of the oil pump 3 and the oil tank 1 and used for filtering dirt in hydraulic oil entering the oil pump 3. It should be noted that the flow direction of the oil pump outlet check valve 4 is the outflow direction of the oil outlet of the oil pump 3, and the check valve 4 is used for preventing hydraulic oil from flowing back to the oil pump 3.

In the main pump source oil supply module of the embodiment of the invention, an oil inlet of a pressure regulating valve 6 is connected with an oil outlet of an oil pump 3 through a pipeline, an oil return port of the pressure regulating valve 6 is connected with a pipeline of an oil tank 1 through a pressure regulating switch 7, an oil outlet of the pressure regulating valve 6 is connected with an oil inlet of a two-position four-way electromagnetic valve 22 through a first switch 14 and a second switch 17 through a pipeline, and the pressure regulating valve 6 and the pressure regulating switch 7 are used for regulating the output oil supply.

Optionally, in the embodiment of the present invention, a pressure accumulator 5 may be disposed on a pipeline between the oil outlet of the oil pump 3 and the oil inlet of the pressure regulating valve 6 for stabilizing pressure and damping vibration.

In practical application, a precision oil filter 15 can be arranged on a pipeline between the first switch 14 and the second switch 17, and the filtering precision of the precision oil filter is 3-10 microns so as to filter fine dirt in oil; in the embodiment of the invention, a precision oil filter 15 with the precision of 5 microns is adopted.

Optionally, in the embodiment of the present invention, an overflow valve 10 is arranged on a pipeline of an oil outlet of the pressure regulating valve 6, and an oil return port of the overflow valve 10 is connected with a pipeline of the oil tank 1, so that unloading is performed in time when the pressure at the oil outlet of the oil pump 3 is too high, thereby preventing damage to the oil pump 3 and cleaning of parts of the hydraulic subsystem.

Optionally, in the embodiment of the present invention, a first pressure gauge 11 is disposed on an oil outlet pipeline of the pressure regulating valve 6, and a second pressure gauge 19 is disposed on an output pipeline of the second switch 17, and is used for indicating a hydraulic pressure of the oil supply pipeline.

Alternatively, in the embodiment of the present invention, a flow meter 13 and a flow meter switch 12 are provided, which are connected in parallel with the first switch 14, the flow meter is controlled by the flow meter switch 12, an input end of the flow meter 13 is connected to the oil outlet pipe of the pressure regulating valve 6 via the flow meter switch 12 (i.e., connected to an input end of the first switch 14), and an output end of the flow meter 13 is connected to an output end of the first switch 14. The flow meter switch 12 in the embodiment of the invention is in a normally closed state, and when necessary, the flow meter switch 12 is opened, the first switch 14 is closed, oil flows through the branch of the flow meter, and the oil supply flow is detected.

In the configuration of the purge hydraulic subsystem shown in fig. 2, the pulsating hydraulic pressure generator module in the embodiment of the present invention includes: a pulsating hydraulic pressure generator 18 and a pulsating hydraulic pressure generator switch 16 connected. It can be seen that the pulsating hydraulic pressure generator module in the embodiment of the present invention is connected in parallel to the second switch 17, and the second switch 17 controls the oil supply and the oil cut-off of the pulsating hydraulic pressure generator 18; when the pulsating hydraulic pressure generator 18 is used, the second switch 17 is in the closed position and the pulsating hydraulic pressure generator switch 16 is in the open position.

In the structure of the cleaning hydraulic subsystem shown in fig. 2, the output module in the embodiment of the present invention includes: a two-position four-way solenoid valve 22 outputting a first switch 32, a second switch 33 and a short-circuit switch 24; an oil inlet of the two-position four-way electromagnetic valve 22 is connected with an output end pipeline of the second switch 17, an oil return port of the two-position four-way electromagnetic valve 22 is connected with an oil return switch 27 through a pipeline, and is communicated to the oil tank 1 through the oil return switch 27, the oil return electromagnetic valve 30 and an oil return filter 31, a first load port of the two-position four-way electromagnetic valve 22 is connected with an output first switch 32 through a pipeline, a second load port of the two-position four-way electromagnetic valve 22 is connected with an output second switch 33 through a pipeline, a first load port of the two-position four-way electromagnetic valve 22 is connected with a cleaning tool 34 through an output first switch 32 through a pipeline, and a. In a specific implementation, the first load port and the second load port are connected to a cylinder block oil inlet 50 of a cylinder block 49 to be cleaned and a manifold 48 of the cleaning tool 34, respectively, see fig. 3.

The two-position four-way electromagnetic valve 22 in the embodiment of the invention is used for controlling the direction of the hydraulic oil flowing into and out of the cleaned cylinder seat; the two-position four-way electromagnetic valve 22 is controlled by a reversing control relay Jo; when not electrified, the output short-circuit switch 24 is connected in parallel to the first load port and the second load port of the two-position four-way electromagnetic valve 22 for communicating the first load port and the second load port of the two-position four-way electromagnetic valve 22; with the output short switch 24 on, the output first switch 32 and the output second switch 33 are in the off position; the first switch 32 and the second switch 33 are closed, the load is disconnected, and the short-circuit switch 24 is opened to clean the hydraulic subsystem oil circularly.

As shown in fig. 2, in the structure of the cleaning hydraulic subsystem, the oil return module in the embodiment of the present invention includes: an oil return switch 27, an oil return solenoid valve 30, and an oil return filter 31; the input end of the oil return switch 27 is connected with an oil return opening pipeline of the two-position four-way electromagnetic valve 22, the output end of the oil return switch 27 is connected with an oil inlet pipeline of the oil return electromagnetic valve 30, and the oil outlet of the oil return electromagnetic valve 30 is connected with an oil return oil filter 31 pipeline and communicated to the oil tank 1 through the oil return filter 31. In the embodiment of the present invention, an oil return pressure gauge 23 may be disposed on a pipeline between the oil return port of the two-position four-way solenoid valve 22 and the oil return switch 27 to indicate the oil return pressure. In addition, the oil return switch 27 and the oil return solenoid valve 30 are used for controlling oil return and adjusting oil return pressure, and the oil return filter 31 is used for filtering dirt in oil return.

Optionally, in the embodiment of the present invention, a back pressure actuator cylinder 25 may be further disposed on the oil return pipeline for hydraulic loading and adjusting the oil return pressure; the oil inlet of the back pressure actuating cylinder 25 is connected to a pipeline between the oil return port of the two-position four-way electromagnetic valve 22 and the oil return switch 27.

Further, as shown in fig. 2, the structure of the cleaning hydraulic subsystem may further include: the device comprises an auxiliary pump source oil supply module and an oil sampling module.

As shown in fig. 2, in the structure of the cleaning hydraulic subsystem, the auxiliary pump source oil supply module in the embodiment of the present invention includes: a hand pump 8 and a hand pump outlet one-way valve 9; an oil inlet of the hand pump 8 is connected with a pipeline of the oil tank 1, specifically, the oil inlet is connected with a pipeline of the oil tank 1 through an oil filter 2, and an oil outlet of the hand pump 8 is connected with an oil outlet pipeline of the pressure regulating valve 6 through a one-way valve 9 of an outlet of the hand pump. The auxiliary pump source oil supply module is used for manual cleaning and connection tightness inspection of the cleaning tool 34 before cleaning.

It should be noted that in the embodiment of the present invention, the flow direction of the outlet check valve 9 of the hand pump is the outflow direction of the oil outlet of the hand pump 8, and the outlet check valve 9 of the hand pump is used for preventing hydraulic oil from flowing back to the hand pump 8.

As shown in fig. 2, in the structure of the cleaning hydraulic subsystem, the oil sampling module in the embodiment of the present invention includes: a first sampler section and a second sampler section; the first sampler part is used for detecting the pollution level of oil liquid supplied by the system, and the second sampler part is used for detecting the pollution level of oil liquid returned by the system and oil liquid flowing out of an inner cavity of the cleaned cylinder seat.

The first sampler section in an embodiment of the present invention includes: the oil inlet of the first sampler 21 is connected with the output end pipeline of the first sampler switch 20, and the oil outlet of the first sampler 21 is connected with the pipeline of the oil tank 1; when sampling is performed, the first sampler switch 20 is in an on state.

The second sampler section in an embodiment of the present invention includes: a second sampler 28 and a second sampler switch 26, the second sampler switch 26 is connected on the pipeline between the oil return port of the two-position four-way solenoid valve 22 and the oil return switch 27, the oil inlet of the second sampler 28 is connected with the pipeline at the output end of the second sampler switch 26, the oil outlet of the second sampler 28 is connected on the pipeline at the output end of the oil return switch 27 through a second sampler one-way valve 29, the opening direction of the second sampler one-way valve 29 is along the outflow direction of the oil outlet of the second sampler 28, and the second sampler one-way valve 29 is used for preventing the return oil of the system from flowing backwards into the second sampler 28. For this purpose, the second sampler check valve 29 can be replaced by a switch; the embodiment of the invention adopts a second sampler one-way valve 29; during sampling, the oil return switch 27 is closed, the oil return solenoid valve 30 is opened, and the second sampler switch 26 is in the open position.

When the cleaning hydraulic subsystem in the above embodiment of the present invention is used to perform cleaning operation, the first output switch 32 and the second output switch 33 are turned off, the short-circuit output switch 24 is turned on, and when the hydraulic load is disconnected, the oil return switch 27 is turned off, the oil return solenoid valve 30 is turned on, and the second sampler switch 26 is turned on to sample oil from the cleaning hydraulic subsystem, so as to check the contamination degree of the oil return hydraulic oil from the cleaning hydraulic subsystem.

In addition, when the first output switch 32 and the second output switch 33 are opened, the output short-circuit switch 24 is closed, and the hydraulic load is switched on, the oil return switch 27 is closed, the oil return electromagnetic valve 30 is opened, the second sampler switch 26 is opened, and the oil liquid flowing through the cleaned cylinder seat inner cavity is sampled to check the degree of pollution of the hydraulic oil in the cleaned cylinder seat inner cavity.

Fig. 3 is a schematic structural diagram of a cleaning tool in a cylinder block cleaning system of an aircraft brake device according to an embodiment of the present invention.

The cleaning tool 34 of the embodiment of the present invention may include: adapter 43, fixed plate 44, clamp plate 45, bolt 46, switch 47 and collecting pipe 48. Wherein the adapter 43 is mounted in the piston bore of the cylinder block being cleaned for connecting the piston bore to the manifold 48 line. The adapter 43 is fixed on the cylinder seat to be cleaned through a fixing plate 44, a pressure plate 45 and a bolt 46; the number of the adapter joints 43 is the same as that of the piston holes on the cleaned cylinder block 49; the port of the adapter 43 is connected with a switch 47 through a pipeline, and the switch 47 is connected with a collecting pipe 48 through a pipeline; a switch 47 is arranged at the port of the adapter 43 to control the communication between the adapter and the collecting pipe 48; in the cleaning operation, only one switch 47 is turned on, and the remaining switches 47 are in the off position; the number of switches 47 corresponds to the number of adapters 43; the adapter 43 and the switch 47 are core parts for realizing efficient cleaning of the oil way section by section. In addition, the first load port and the second load port in the output module of the cleaning hydraulic subsystem shown in fig. 2 are connected to the cylinder block oil inlet 50 of the cylinder block 49 to be cleaned and the manifold 48 of the cleaning tool 34, respectively.

The cylinder seat cleaning system of the aircraft brake device provided by the embodiment of the invention comprises a cleaning hydraulic subsystem and a cleaning tool, wherein the cleaning hydraulic subsystem provides a required oil source, the cleaning tool is used for fixing a cleaned cylinder seat and providing oil path selection, and oil is forced to flow through a hole cavity of the cylinder seat one by one, so that the cleaning of the oil path section by section of an inner cavity is realized; the hydraulic interface oil supply port and the oil return port of the cleaning hydraulic subsystem are connected with a cleaning tool; in addition, the cleaning fluid pressure subsystem comprises a main pump source oil supply module, an auxiliary pump source oil supply module, a pulsating hydraulic generator module, an output module, an oil return module, an oil sampling module and the like; the cleaning tool comprises an adapter, a fixing plate, a pressing plate, a bolt, a switch and a collecting pipe; the washing system may also include a washing rack including a rack plate and legs.

Optionally, fig. 4 is a schematic structural diagram of a pulsating hydraulic pressure generator in the cleaning hydraulic subsystem according to an embodiment of the present invention. The pulsating hydraulic pressure generator 18, as shown in fig. 4, may include: a controller 35 and a proportional solenoid valve 36; an oil inlet P of the proportional solenoid valve 36 is connected with a pipeline of the pulsation hydraulic generator switch 16, an oil outlet L of the proportional solenoid valve 36 is connected with a pipeline of the output end of the second switch 17, and an oil return port R of the proportional solenoid valve 36 is connected with a pipeline of the oil tank 1. In addition, the proportional solenoid valve 36 is electrically connected to the controller 35, and the controller 35 is configured to send a pulsating current signal to the proportional solenoid valve 36, so that the proportional solenoid valve 36 outputs a pulsating hydraulic pressure according to the pulsating current signal.

Optionally, fig. 5 is a schematic structural diagram of another pulsating hydraulic pressure generator in the cleaning hydraulic subsystem according to the embodiment of the present invention. The pulsating hydraulic pressure generator 18, as shown in fig. 5, may include: a controller 35 and an electro-hydraulic servo valve 37; an oil inlet P of the electro-hydraulic servo valve 37 is connected with a pipeline of the pulsation hydraulic generator switch 16, an oil outlet L of the electro-hydraulic servo valve 37 is connected with a pipeline of an output end of the second switch 17, and an oil return port R of the electro-hydraulic servo valve 37 is connected with a pipeline of the oil tank 1. The electrohydraulic servo valve 37 is electrically connected to the controller 35, and the controller 35 is configured to send a pulsating current signal to the electrohydraulic servo valve 37, so that the electrohydraulic servo valve 37 outputs a pulsating hydraulic pressure in accordance with the pulsating current signal.

Optionally, fig. 6 is a schematic structural diagram of another pulsating hydraulic pressure generator in the cleaning hydraulic subsystem according to the embodiment of the present invention. As shown in fig. 6, the pulsating hydraulic pressure generator 18 may include: the oil inlet P1 of the electromagnetic valve 39 is connected with the pipeline of the pulsation hydraulic generator switch 16, and the oil outlet P2 of the electromagnetic valve 39 is connected with the pipeline of the output end of the second switch 17. In addition, the solenoid valve 39 is electrically connected to a relay 38, and the relay 38 is configured to send an on-off pulsating current signal to the solenoid valve 39 so that the solenoid valve 39 outputs a pulsating hydraulic pressure in accordance with the pulsating current signal.

Optionally, fig. 7 is a schematic structural diagram of another pulsating hydraulic pressure generator in the cleaning hydraulic subsystem according to the embodiment of the present invention. The pulsating hydraulic pressure generator 18, as shown in fig. 7, may include: a relay 38, a hydro-electric valve 40, a pressure reducer 41, and a pressure reducer switch 42; the oil inlet of the pressure reducer 41 is connected with the output end of the pressure reducer switch 42 and is connected with the pulsation hydraulic generator switch 16 through the pressure reducer switch 42, and the oil outlet of the pressure reducer 41 is connected with the first oil inlet P3 of the electrohydraulic valve 40 through a pipeline; the pressure reducer 41 is used for reducing the pressure entering the first oil inlet P3 of the electro-hydraulic valve 40, so that the pressure of the first oil inlet P3 of the electro-hydraulic valve 40 is smaller than the pressure of the second oil inlet P4 of the electro-hydraulic valve 40. A first oil inlet P3 of the electrohydraulic valve 40 is connected with an oil outlet pipeline of the pressure reducer 41, a second oil inlet P4 of the electrohydraulic valve 40 is connected with an input end pipeline of the pressure reducer switch 42 and is connected with a pipeline of the pulsation hydraulic generator switch 16, and an oil outlet P2 of the electrohydraulic valve 40 is connected with an output end pipeline of the second switch 17; the electrohydraulic valve 40 is electrically connected to the relay 38, and the relay 38 is configured to send an on-off pulsating current signal to the solenoid valve 39, so that the solenoid valve 39 outputs a pulsating hydraulic pressure in accordance with the pulsating current signal.

Further describing the cleaning tool 34 in the embodiment of the present invention, as shown in fig. 3, the cleaning tool 34 may further include: the cylinder block exhaust port 51 of the cylinder block 49 to be cleaned is connected to the manifold 48 through the switch 47. At this time, the number of switches 47 is greater than the number of the adapters 43, and one switch 47 is added.

Fig. 8 is a schematic structural diagram of an adapter in the cleaning tool according to the embodiment of the present invention, and fig. 9 is a schematic structural diagram of another adapter in the cleaning tool according to the embodiment of the present invention. In practical application, the adapter 43 in the embodiment of the present invention is a pipe fitting, one end of the adapter is a polished rod, the other end of the adapter is a threaded interface, and the outer diameter of the adapter is provided with a flange; the polish rod is matched with a piston hole of a cleaned cylinder seat 49, the diameter of the polish rod is the same as the inner diameter of the piston hole, and the sealing performance between the polish rod and the piston hole is provided by a sealing ring; the polish rod length, i.e., the distance from the end face of the adapter 43 to the flange, is less than the piston bore depth after assembly; the flange is used for limiting and fixing, and the threaded interface is used for connecting a switch 47; the threaded interface is an internal thread or an external thread; the flange is two annular bosses above the outer surface of the pipe fitting, see fig. 8, or one annular boss above the outer surface of the pipe fitting, see fig. 9; in the case of two annular bosses, after assembly, one side of one annular boss presses against the piston bore end face of the cylinder block 49 to be cleaned, and one side of the other annular boss presses against the inner surface of the fixing plate 44; in the case of an annular boss, one side of the annular boss presses against the cylinder block piston bore end face and the other side of the annular boss presses against the inner surface of the fixed plate 44 after assembly.

Fig. 10 is a schematic structural diagram of a fixing plate in the cleaning tool according to the embodiment of the invention. The fixing plate 44 is used for fixing the adapter 43; the fixing plate 44 is a circular disk body, a bolt hole is formed in the center of the fixing plate, a plurality of through holes are uniformly distributed in the circumferential direction, the number of the through holes is the same as that of the adapters 43, and the diameter of each through hole is slightly larger than the outer diameter of the threaded interface end of each adapter 43, so that the threaded interface end of each adapter 43 extends out of the through hole; the diameter of the reference circle where the center of the through hole is located is the same as that of the reference circle where the center of the piston hole of the cylinder seat is located.

The adapter 43 of this embodiment is totally 6, and fixed plate 44 circumference equipartition has 6 through-holes.

Fig. 11 is a schematic structural diagram of one pressure plate in the cleaning tool according to the embodiment of the present invention, fig. 12 is a schematic structural diagram of another pressure plate in the cleaning tool according to the embodiment of the present invention, and fig. 13 is a schematic structural diagram of another pressure plate in the cleaning tool according to the embodiment of the present invention. The pressing plate 45 in the embodiment of the present invention is used for pressing the cylinder block 49 to be cleaned, specifically, pressing the outer end surface of the cylinder block 49 to be cleaned. The pressure plate 49 is a circular disk body with a bolt hole in the center, as shown in fig. 11.

In the case that the cylinder block oil inlet 50 of the cylinder block 49 to be cleaned is arranged on the outer end surface, the pressing plate 45 is provided with corresponding notches at the periphery thereof for accommodating the installation of the pipe joint and the pipe joint connecting the cylinder block oil inlet 50 of the cylinder block 49 to be cleaned, and the notches are circular through holes or notches, as shown in fig. 12 and 13; the present embodiment uses a pressure plate 45 without a notch.

The diameters of the pressure plate 45 and the fixed plate 44 in the embodiment of the invention are the same as the outer diameter of the cleaned cylinder seat 49 or slightly larger than the outer diameter of the cylinder seat, the "slightly larger" means that the pressure plate 45 can cover the bottom of the piston hole of the cylinder seat so as to better fasten the cleaning of the cylinder seat, and the specific value of the "slightly larger" is generally 3-6 mm. The diameter of the pressure plate 45 and the fixing plate 44 of this embodiment is 5mm larger than the outer diameter of the cylinder block 49 to be cleaned.

The bolt 46 in the embodiment of the invention is used for connecting the fixed plate 44 and the pressure plate 45, and the adapter 43 is fixed in the piston of the cylinder seat 49 to be cleaned through the pressure plate 45 and the fixed plate 44; bolts 46 are respectively passed through the bolt holes of the fixing plate 44, the center of the cylinder block 49 to be cleaned and the bolt holes of the pressing plate 45, and are tightened with nuts to fix the adapter 43 to the cylinder block 49 to be cleaned.

Fig. 14 is a schematic structural view of a cleaning support in a cylinder block cleaning system according to an embodiment of the present invention, and fig. 15 is a schematic three-dimensional structural view of the cleaning support shown in fig. 14. Referring to fig. 14 and 15, the cylinder block cleaning system according to the embodiment of the present invention may further include a cleaning bracket for placing the cylinder block 49 to be cleaned, the cleaning bracket including a frame plate 52 and a leg 53, the frame plate having a large through hole at the center thereof and a plurality of small through holes around the large through hole; the frame plate 52 and the support leg 53 are fixedly connected, and the frame plate 52 and the 4 round support legs 53 are fixed by welding in the embodiment.

When the cylinder seat cleaning system of the aircraft brake device provided by the embodiment of the invention is used for cleaning, 1, cleaning oil liquid: circulating oil liquid for cleaning a hydraulic system to achieve the required oil liquid pollution degree; 2. assembling a tool: assembling and connecting the cleaning tool with the cylinder seat 49 to be cleaned; 3. supporting: placing the cleaned cylinder seat 49 and the cleaning tool assembly on a cleaning bracket, and horizontally placing the end face of the cleaned cylinder seat 49 on the frame plate; 4. a connecting system: the first switch 32 for outputting the cleaning hydraulic subsystem is connected with a pipeline of an oil inlet 50 of a cylinder seat 49 of a cylinder seat to be cleaned, and the second switch 33 for outputting the cleaning hydraulic subsystem is connected with a pipeline of a cleaning tool collecting pipe 48; 5. cleaning: opening one switch 47 of the cleaning tool to clean the inner cavity of the cylinder base; closing the switch 47, and opening a switch 47 to clean the inner cavity of the cylinder block; finally, the switch 47 connected with the exhaust port 51 of the cylinder seat 49 to be cleaned is opened, and the inner cavity of the cylinder seat is cleaned.

During pulse cleaning, the pulse hydraulic generator 18 is used for supplying oil, and the cleaning operation is the same, and the switches 47 are turned on and off one by one for cleaning;

during reversing cleaning, the oil way is switched by using the two-position four-way electromagnetic valve 22, the cleaning operation is the same, and the switches 47 are opened and closed one by one for cleaning;

the cleaning effect is sampled and tested by the second sampler 28, the specified oil pollution degree level is reached, and the cleaning operation is finished.

Although the embodiments of the present invention have been described above, the above description is only for the convenience of understanding the present invention, and is not intended to limit the present invention. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A cylinder block cleaning system for an aircraft brake assembly, comprising: the cleaning hydraulic subsystem and the cleaning tool (34) are connected;

2. The cylinder block washing system for an aircraft brake rigging according to claim 1, wherein said wash hydraulic subsystem further comprises: the auxiliary pump source oil supply module and the oil sampling module;

3. The cylinder block cleaning system for an aircraft brake rigging according to claim 2,

4. The cylinder block washing system for an aircraft brake device as claimed in claim 2, wherein in the pulsating hydraulic pressure generator module,

5. The cylinder block washing system for an aircraft brake rigging of claim 2, wherein said main pump supply oil module further comprises at least one of the following configurations:

6. The cylinder block washing system of an aircraft brake device of claim 2, wherein the oil return module further comprises at least one of:

7. The cylinder block cleaning system for an aircraft brake rigging according to claim 2,

8. The cylinder block cleaning system for an aircraft brake rigging according to claim 2,

9. The cylinder block washing system of an aircraft brake device according to claim 2, characterized in that the washing tool (34) comprises: the device comprises an adapter (43), a fixing plate (44), a pressing plate (45), a bolt (46), a switch (47) and a collecting pipe (48);