CN111022402B - Electromagnetic valve for starting helicopter APU - Google Patents
Electromagnetic valve for starting helicopter APU Download PDFInfo
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- CN111022402B CN111022402B CN201911228988.6A CN201911228988A CN111022402B CN 111022402 B CN111022402 B CN 111022402B CN 201911228988 A CN201911228988 A CN 201911228988A CN 111022402 B CN111022402 B CN 111022402B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/021—Valves for interconnecting the fluid chambers of an actuator
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/08—Servomotor systems incorporating electrically operated control means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/02—Construction of housing; Use of materials therefor of lift valves
- F16K27/029—Electromagnetically actuated valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
- F16K31/0603—Multiple-way valves
- F16K31/0624—Lift valves
- F16K31/0634—Lift valves with fixed seats positioned between movable valve members
- F16K31/0637—Lift valves with fixed seats positioned between movable valve members with ball shaped valve members
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
- F16K31/0675—Electromagnet aspects, e.g. electric supply therefor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
- F16K31/10—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid with additional mechanism between armature and closure member
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
- F16K31/36—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor
- F16K31/40—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor with electrically-actuated member in the discharge of the motor
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Fluid Mechanics (AREA)
- Magnetically Actuated Valves (AREA)
- Multiple-Way Valves (AREA)
Abstract
The invention provides an electromagnetic valve for starting an APU (auxiliary Power Unit) of a helicopter, which comprises an outer sleeve 9, a valve core 7, a third elastic part 8, a steel ball 4 and a steel ball control switch. The electromagnetic valve can be switched on and off through a manual switch, can be remotely switched on and off through an electric signal, and can be opened and closed through a high-pressure and high-flow pipeline between the pressure accumulator and the hydraulic starting motor.
Description
Technical Field
The invention belongs to the field of helicopter hydraulic system design, and particularly relates to an electromagnetic valve for starting an APU (auxiliary Power Unit) of a helicopter.
Background
When the helicopter is used for field training, a mobile power supply is required to be carried, and the engine of the helicopter is started through the mobile power supply. This not only increases the takeoff weight of the aircraft but also its number of engine starts is very limited. The hydraulic system is applied to an APU (auxiliary power unit) starting system, so that the problems can be greatly alleviated, and all-weather and full-time-domain starting can be realized at any time. However, the hydraulic power source module often adopts two accumulators to supply pressure to the APU hydraulic motor simultaneously, and the pressure and the flow that the hydraulic motor entry was flowed through in the starting process are great, still need external hydraulic power source to supply pressure to the accumulator simultaneously, and ordinary solenoid valve is difficult to satisfy the requirement that the APU started control, needs a section of solenoid valve special for helicopter APU starting urgently.
Disclosure of Invention
The purpose of the invention is as follows: the solenoid valve for starting the APU of helicopter is used to connect and disconnect the APU accumulator to the pressure supply pipeline of the starting motor and has the function of connecting and disconnecting the solenoid valve manually.
The technical scheme of the invention is as follows: the solenoid valve for starting the APU of the helicopter is provided and comprises an outer sleeve 9, a valve core 7, a third elastic piece 8, a steel ball 4 and a steel ball control switch;
the outer sleeve 9 comprises a high-pressure cavity 90, a low-pressure cavity 91, a hydraulic control cavity 92, a switch control cavity 94 and a load cavity 93;
the output port a of the high pressure chamber 90 communicates with the input port F of the load chamber 93; the control port B of the high-pressure chamber 90 is communicated with the control port C of the low-pressure chamber 91 and the first port D of the hydraulic control chamber 92; the input port E of the high pressure chamber 90 communicates with a plurality of accumulators which maintain the high pressure chamber 90 in a high pressure state;
the output port H of the load chamber 93 is communicated with a load; the second port G of the hydraulic control chamber 92 communicates with the output port a of the high pressure chamber 90;
the valve core 7 comprises a first sealing section 70 and a second sealing section 71, and the first sealing section 70 and the second sealing section 71 are connected through a connecting rod;
the second sealing section 71 is positioned at a communication part of the input port F of the load cavity 93 and the output port A of the high-pressure cavity 90 and is used for controlling the on-off of the load cavity 93 and the high-pressure cavity 90; the second sealing section 71 is connected with one end of the third elastic member 8, and the other end of the third elastic member 8 is limited in the shell of the load cavity 93;
the first sealing section 70 is slidably disposed at a communication position between the output port a of the high-pressure chamber 90 and the second port G of the hydraulic control chamber 92, and is used for isolating the high-pressure chamber 90 from the hydraulic control chamber 92;
the steel ball 4 is positioned at the communication part of the control port B of the high-pressure cavity 90, the control port C of the low-pressure cavity 91 and the first port D of the hydraulic control cavity 92;
the steel ball control switch is positioned in the switch control cavity 94 and is used for controlling the steel ball 4 to be at a first position or a second position;
when the steel ball 4 is at the first position, the control port B of the high-pressure cavity 90 is communicated with the first port D of the hydraulic control cavity 92, the control port C of the low-pressure cavity 91 is disconnected from the control port B of the high-pressure cavity 90 and the first port D of the hydraulic control cavity 92, high-pressure oil is input into the first port D of the hydraulic control cavity 92 through the control port B of the high-pressure cavity 90, the high-pressure oil pushes the first sealing section 70 to move, the first sealing section 70 drives the second sealing section 71 to move in the direction close to the load cavity 93, the output port a of the high-pressure cavity 90 is communicated with the input port F of the load cavity 93, and high-pressure oil is input into the load cavity 93 through the output port a of the high-pressure cavity 90; the second seal segment 71 compresses the third spring 8;
when the steel ball 4 is at the second position, the control port B of the high-pressure cavity 90 is disconnected from the first port D of the hydraulic control cavity 92, and the control port C of the low-pressure cavity 91 is communicated with the first port D of the hydraulic control cavity 92; the third elastic part 8 resets to push the second sealing section 71 to move away from the load cavity 93, and the second sealing section 71 disconnects the communication between the input port F of the load cavity 93 and the output port A of the high-pressure cavity 90 and stops inputting high-pressure oil into the load cavity 93.
Further, the steel ball control switch comprises an electromagnet 10, a first elastic piece 2 and an armature 3;
one end of the armature 3 is positioned in the switch control cavity 94 and is positioned in the low-pressure cavity 91; one end of the first elastic element 2 is limited, and the other end of the first elastic element is contacted with one end of the armature 3 positioned in the switch control cavity 94; the other end of the armature 3 positioned in the low-pressure cavity 91 is contacted with the steel ball 4;
the electromagnet 10 is positioned in the switch control cavity 94; when the electromagnet 10 is electrified, the armature 3 is driven to move upwards to compress the first elastic piece 2, and the steel ball 4 is positioned at a first position under the action of high-pressure oil; when the electromagnet 10 is powered off, the first elastic piece 2 resets, the armature 3 moves downwards, and the steel ball is pushed to be at the second position.
Further, the steel ball control switch also comprises a manual switch 1, the manual switch 1 is clamped with a shell of the outer sleeve 9, and the manual switch 1 limits one end of the first elastic piece 2;
when the electromagnet 10 is in a power-off state and the manual switch 1 is pulled, the elastic force of the first elastic piece 2 on the armature 3 is reduced, the armature 3 is pushed to move upwards by the steel ball 4 under the action of high-pressure oil, and the steel ball 4 is located at a first position.
Further, the manual switch 1 can be folded and stored on the housing of the outer sleeve 9.
Further, the solenoid valve further comprises an inner sleeve 5 and a second elastic member 6,
one end of the second elastic element 6 is limited by a first sealing section 70; the other end of the second elastic piece 6 is contacted with the inner sleeve 5;
the inner sleeve 5 is slidably arranged in the hydraulic control cavity 92; when the steel ball 4 is at the first position, high-pressure oil is input into the first port D of the hydraulic control cavity 92 through the control port B of the high-pressure cavity 90 to push the inner sleeve 5 to slide; the second elastic member 6 pushes the first seal segment 70 to move.
Further, the solenoid valve further includes a first sealing ring 13, and the first sealing ring 13 is sleeved on the first sealing section 70 and is located at a contact position between the first sealing section 70 and the hydraulic control chamber 92, so as to isolate the high-pressure chamber 90 from the hydraulic control chamber 92.
Further, the electromagnetic valve further comprises a second sealing ring 11, and the second sealing ring 11 is sleeved on the armature 3 and is positioned at a communication part of the low-pressure cavity 91 and the switch control cavity 94; the second seal 11 and the armature 3 co-act to isolate the low pressure chamber 91 from the switch control chamber 94.
Further, at least one of the first elastic member 2, the second elastic member 6 and the third elastic member 8 is a spring.
The invention has the beneficial effects that: the electromagnetic valve for starting the APU of the helicopter can be switched on and off through a manual switch, can also be switched on and off remotely through an electric signal, can meet the control requirements of opening and closing a high-pressure and large-flow pipeline between a pressure accumulator and a hydraulic starting motor, can realize that a helicopter engine can be started at any time in all-weather and full-use environments, and greatly improves the survival capacity of the helicopter in complex environments.
Drawings
FIG. 1 is a schematic diagram of a solenoid valve in a de-energized state;
fig. 2 is a schematic diagram of the solenoid valve in an energized state.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
Fig. 1 is a schematic diagram of a power-off state of an electromagnetic valve, fig. 2 is a schematic diagram of a power-on state of an electromagnetic valve, and in combination with fig. 1 and fig. 2, the embodiment provides an electromagnetic valve for starting a helicopter APU, which comprises an outer sleeve 9, a valve core 7, a third elastic member 8, a steel ball 4 and a steel ball control switch.
The outer sleeve 9 comprises a high-pressure cavity 90, a low-pressure cavity 91, a hydraulic control cavity 92, a switch control cavity 94 and a load cavity 93;
the output port a of the high pressure chamber 90 communicates with the input port F of the load chamber 93; the control port B of the high-pressure chamber 90 is communicated with the control port C of the low-pressure chamber 91 and the first port D of the hydraulic control chamber 92; the input port E of the high pressure chamber 90 communicates with a plurality of accumulators which maintain the high pressure chamber 90 in a high pressure state;
the output port H of the load chamber 93 is communicated with a load; the second port G of the hydraulic control chamber 92 communicates with the output port a of the high pressure chamber 90;
the valve core 7 comprises a first sealing section 70 and a second sealing section 71, and the first sealing section 70 and the second sealing section 71 are connected through a connecting rod;
the second sealing section 71 is positioned at a communication part of the input port F of the load cavity 93 and the output port A of the high-pressure cavity 90 and is used for controlling the on-off of the load cavity 93 and the high-pressure cavity 90; the second sealing section 71 is connected with one end of the third elastic member 8, and the other end of the third elastic member 8 is limited in the shell of the load cavity 93;
the first sealing section 70 is slidably disposed at a communication position between the output port a of the high-pressure chamber 90 and the second port G of the hydraulic control chamber 92, and is used for isolating the high-pressure chamber 90 from the hydraulic control chamber 92;
the steel ball 4 is positioned at the communication part of the control port B of the high-pressure cavity 90, the control port C of the low-pressure cavity 91 and the first port D of the hydraulic control cavity 92;
the steel ball control switch is positioned in the switch control cavity 94 and is used for controlling the steel ball 4 to be at a first position or a second position;
when the steel ball 4 is at the first position, that is, the electromagnetic valve is in an energized state, as shown in fig. 2, the control port B of the high-pressure chamber 90 is communicated with the first port D of the hydraulic control chamber 92, the control port C of the low-pressure chamber 91 is disconnected from the control port B of the high-pressure chamber 90 and the first port D of the hydraulic control chamber 92, high-pressure oil is input into the first port D of the hydraulic control chamber 92 through the control port B of the high-pressure chamber 90, the high-pressure oil pushes the first sealing section 70 to move, the first sealing section 70 drives the second sealing section 71 to move in a direction close to the load chamber 93, the output port a of the high-pressure chamber 90 is communicated with the input port F of the load chamber 93, and the high-pressure oil is input into the load chamber 93 through the output port a of the high-pressure chamber 90; the second seal segment 71 compresses the third spring 8;
when the steel ball 4 is in the second position, that is, the electromagnetic valve is in a power-off state, as shown in fig. 1, the control port B of the high-pressure chamber 90 is disconnected from the first port D of the hydraulic control chamber 92, and the control port C of the low-pressure chamber 91 is communicated with the first port D of the hydraulic control chamber 92; the third elastic part 8 resets to push the second sealing section 71 to move away from the load cavity 93, and the second sealing section 71 disconnects the communication between the input port F of the load cavity 93 and the output port A of the high-pressure cavity 90 and stops inputting high-pressure oil into the load cavity 93.
The electromagnetic valve of the embodiment is used for connecting and disconnecting the APU accumulator to a pressure supply pipeline of the starting motor.
Further, as shown in fig. 1, the steel ball control switch includes an electromagnet 10, a first elastic member 2, and an armature 3;
one end of the armature 3 is positioned in the switch control cavity 94 and is positioned in the low-pressure cavity 91; one end of the first elastic element 2 is limited, and the other end of the first elastic element is contacted with one end of the armature 3 positioned in the switch control cavity 94; the other end of the armature 3 positioned in the low-pressure cavity 91 is contacted with the steel ball 4;
the electromagnet 10 is positioned in the switch control cavity 94; when the electromagnet 10 is electrified, the armature 3 is driven to move upwards to compress the first elastic piece 2, and the steel ball 4 is positioned at a first position under the action of high-pressure oil; when the electromagnet 10 is powered off, the first elastic piece 2 resets, the armature 3 moves downwards, and the steel ball is pushed to be at the second position.
Further, the steel ball control switch also comprises a manual switch 1, the manual switch 1 is clamped with a shell of the outer sleeve 9, and the manual switch 1 limits one end of the first elastic piece 2;
when the electromagnet 10 is in a power-off state and the manual switch 1 is pulled, the elastic force of the first elastic piece 2 on the armature 3 is reduced, the armature 3 is pushed to move upwards by the steel ball 4 under the action of high-pressure oil, and the steel ball 4 is located at a first position.
Further, the manual switch 1 can be folded and stored on the housing of the outer sleeve 9.
The manual switch of the embodiment has a function of manually turning on and off the APU solenoid valve.
Further, the solenoid valve further comprises an inner sleeve 5 and a second elastic member 6,
one end of the second elastic element 6 is limited by a first sealing section 70; the other end of the second elastic piece 6 is contacted with the inner sleeve 5;
the inner sleeve 5 is slidably arranged in the hydraulic control cavity 92; when the steel ball 4 is at the first position, high-pressure oil is input into the first port D of the hydraulic control cavity 92 through the control port B of the high-pressure cavity 90 to push the inner sleeve 5 to slide; the second elastic member 6 pushes the first seal segment 70 to move.
Further, the solenoid valve further includes a first sealing ring 13, and the first sealing ring 13 is sleeved on the first sealing section 70 and is located at a contact position between the first sealing section 70 and the hydraulic control chamber 92, so as to isolate the high-pressure chamber 90 from the hydraulic control chamber 92.
Further, the electromagnetic valve further comprises a second sealing ring 11, and the second sealing ring 11 is sleeved on the armature 3 and is positioned at a communication part of the low-pressure cavity 91 and the switch control cavity 94; the second seal 11 and the armature 3 co-act to isolate the low pressure chamber 91 from the switch control chamber 94.
Further, at least one of the first elastic member 2, the second elastic member 6 and the third elastic member 8 is a spring.
The principle of action of the components of the invention:
the electromagnetic valve comprises a manual switch 1, a first elastic piece 2, an armature 3, a steel ball 4, an inner sleeve 5, a second elastic piece 6, a valve core 7, a third elastic piece 8, an outer sleeve 9, an electromagnet 10, a second sealing ring 11, a third sealing ring 12 and a first sealing ring 13. The product is composed of a control mechanism and an actuating mechanism. The control mechanism mainly comprises an electromagnet assembly, a valve seat, a valve frame, a steel ball and other parts; the actuating mechanism mainly comprises a slide valve component, a spring, an inner sleeve, an outer sleeve and other components.
The sealing structures of the two parts have the same form, and the spherical surface of the sealing element is tightly leaned against the sharp edge of the orifice of the matching part to form linear contact sealing, wherein the control mechanism is pressed on the orifice of the valve seat by a steel ball, and the actuating mechanism is used for pressing the valve core on the orifice of the valve sleeve to complete sealing. The manual switch has the function of manually switching on and off the APU electromagnetic valve; the second sealing ring 11, the third sealing ring 12 and the first sealing ring 13 play a role in isolating the high-pressure cavity, the low-pressure cavity and other cavities; the first elastic piece is a flexible connecting cylindrical spring between the manual switch and the armature; the second elastic piece is a flexible connecting cylindrical spring between the valve core and the inner sleeve, when a high-pressure working medium enters the left side of the inner sleeve through a pilot oil path, the hydraulic pressure pushes the inner sleeve and the valve core to open a main oil through hole, in the process, the cylindrical spring plays a role of buffering and can prevent the inner sleeve from directly impacting the valve core, in addition, a cavity where the cylindrical spring is located is a closed dead cavity, the working medium cannot enter the cavity, air in the cavity cannot be discharged, the cylindrical spring can prevent the end face of the inner sleeve from being in direct contact with the end face of a valve sleeve, and the air in the cavity where the cylindrical spring is located is compressed in the process that the inner sleeve pushes the valve core, so that the valve core cannot reset or is difficult to reset; the third elastic part is a conical valve core return spring, the distance between each spring ring is basically kept to be changed synchronously at the initial stage of bearing load, when the load is continuously and gradually increased, the spring is compressed and contacted from a large ring one by one, the number of working turns is gradually reduced, the rigidity is gradually increased until all the spring rings are completely compressed, and the spring resonance is favorably prevented.
The foregoing is merely a detailed description of the embodiments of the present invention, and some of the conventional techniques are not detailed. The scope of the present invention is not limited thereto, and any changes or substitutions that can be easily made by those skilled in the art within the technical scope of the present invention will be covered by the scope of the present invention. The protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (8)
1. A solenoid valve for starting an APU of a helicopter is characterized by comprising an outer sleeve (9), a valve core (7), a third elastic piece (8), a steel ball (4) and a steel ball control switch;
the outer sleeve (9) comprises a high-pressure cavity (90), a low-pressure cavity (91), a hydraulic control cavity (92), a switch control cavity (94) and a load cavity (93);
the output port A of the high-pressure cavity (90) is communicated with the input port F of the load cavity (93); the control port B of the high-pressure cavity (90) is communicated with the control port C of the low-pressure cavity (91) and the first port D of the hydraulic control cavity (92); the input port E of the high-pressure chamber (90) is communicated with a plurality of pressure accumulators, and the pressure accumulators enable the high-pressure chamber (90) to be kept in a high-pressure state;
the output port H of the load cavity (93) is communicated with a load; the second port G of the hydraulic control cavity (92) is communicated with the output port A of the high-pressure cavity (90);
the valve core (7) comprises a first sealing section (70) and a second sealing section (71), and the first sealing section (70) and the second sealing section (71) are connected through a connecting rod;
the second sealing section (71) is positioned at the communication part of the input port F of the load cavity (93) and the output port A of the high-pressure cavity (90) and is used for controlling the on-off of the load cavity (93) and the high-pressure cavity (90); the second sealing section (71) is connected with one end of a third elastic piece (8), and the other end of the third elastic piece (8) is limited in the shell of the load cavity (93);
the first sealing section (70) is arranged at the communication position of the output port A of the high-pressure cavity (90) and the second port G of the hydraulic control cavity (92) in a sliding manner and is used for isolating the high-pressure cavity (90) from the hydraulic control cavity (92);
the steel ball (4) is positioned at the communication part of a control port B of the high-pressure cavity (90), a control port C of the low-pressure cavity (91) and a first port D of the hydraulic control cavity (92);
the steel ball control switch is positioned in the switch control cavity (94) and is used for controlling the steel ball (4) to be at a first position or a second position;
when the steel ball (4) is at a first position, a control port B of the high-pressure cavity (90) is communicated with a first port D of a hydraulic control cavity (92), a control port C of the low-pressure cavity (91) is disconnected with the control port B of the high-pressure cavity (90) and the first port D of the hydraulic control cavity (92), high-pressure oil is input into the first port D of the hydraulic control cavity (92) through the control port B of the high-pressure cavity (90), the high-pressure oil pushes the first sealing section (70) to move, the first sealing section (70) drives the second sealing section (71) to move towards a direction close to the load cavity (93), an output port A of the high-pressure cavity (90) is communicated with an input port F of the load cavity (93), and the high-pressure oil is input into the load cavity (93) through the output port A of the high-pressure cavity (90); the second sealing section (71) compresses the third elastic member (8);
when the steel ball (4) is at the second position, the control port B of the high-pressure cavity (90) is disconnected with the first port D of the hydraulic control cavity (92), and the control port C of the low-pressure cavity (91) is communicated with the first port D of the hydraulic control cavity (92); and the third elastic piece (8) resets to push the second sealing section (71) to move in the direction away from the load cavity (93), the second sealing section (71) disconnects the communication between the input port F of the load cavity (93) and the output port A of the high-pressure cavity (90), and high-pressure oil is stopped from being input into the load cavity (93).
2. The solenoid valve according to claim 1, characterized in that said steel ball control switch comprises an electromagnet (10), a first elastic member (2) and an armature (3); one end of the armature iron (3) is positioned in the switch control cavity (94), and the other end of the armature iron is positioned in the low-pressure cavity (91); one end of the first elastic piece (2) is limited, and the other end of the first elastic piece is contacted with one end, positioned in the switch control cavity (94), of the armature iron (3); the other end of the armature iron (3) positioned in the low-pressure cavity (91) is contacted with the steel ball (4);
the electromagnet (10) is positioned in the switch control cavity (94); when the electromagnet (10) is electrified, the armature (3) is driven to move upwards to compress the first elastic piece (2), and the steel ball (4) is positioned at a first position under the action of high-pressure oil; when the electromagnet (10) is powered off, the first elastic piece (2) resets, the armature (3) moves downwards, and the steel ball is pushed to be at the second position.
3. The electromagnetic valve according to claim 2, characterized in that the steel ball control switch further comprises a manual switch (1), the manual switch (1) is clamped with the shell of the outer sleeve (9), and the manual switch (1) limits one end of the first elastic element (2);
when the electromagnet (10) is in a power-off state and the manual switch (1) is pulled, the elastic force of the first elastic piece (2) on the armature (3) is reduced, the armature (3) is pushed to move upwards by the steel ball (4) under the action of high-pressure oil, and the steel ball (4) is located at a first position.
4. A solenoid valve according to claim 3, characterised in that the manual switch (1) is foldable on the housing of the outer sleeve (9).
5. The solenoid valve according to claim 1, characterized in that it further comprises an internal sleeve (5) and a second elastic member (6),
one end of the second elastic piece (6) is limited through a first sealing section (70); the other end of the second elastic piece (6) is contacted with the inner sleeve (5);
the inner sleeve (5) is arranged in the hydraulic control cavity (92) in a sliding manner; when the steel ball (4) is at the first position, high-pressure oil input into the first port D of the hydraulic control cavity (92) through the control port B of the high-pressure cavity (90) pushes the inner sleeve (5) to slide; the second elastic piece (6) pushes the first sealing section (70) to move.
6. The electromagnetic valve according to claim 1, characterized in that the electromagnetic valve further comprises a first sealing ring (13), and the first sealing ring (13) is sleeved on the first sealing section (70) and is located at a contact part of the first sealing section (70) and the hydraulic control chamber (92) and used for isolating the high-pressure chamber (90) and the hydraulic control chamber (92).
7. The solenoid valve according to claim 1, characterized in that it further comprises a second sealing ring (11), the second sealing ring (11) is sleeved on the armature (3) and is located at the communication position of the low pressure chamber (91) and the switch control chamber (94); the second sealing ring (11) and the armature (3) cooperate to isolate the low pressure chamber (91) from the switch control chamber (94).
8. A solenoid valve according to claim 1, characterised in that at least one of the first (2), second (6) and third (8) elastic members is a spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911228988.6A CN111022402B (en) | 2019-12-04 | 2019-12-04 | Electromagnetic valve for starting helicopter APU |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911228988.6A CN111022402B (en) | 2019-12-04 | 2019-12-04 | Electromagnetic valve for starting helicopter APU |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111022402A CN111022402A (en) | 2020-04-17 |
| CN111022402B true CN111022402B (en) | 2021-09-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911228988.6A Active CN111022402B (en) | 2019-12-04 | 2019-12-04 | Electromagnetic valve for starting helicopter APU |
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| Country | Link |
|---|---|
| CN (1) | CN111022402B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86203206U (en) * | 1986-05-13 | 1988-02-10 | 陆龙其 | Improved solenoid valve |
| CN1065709A (en) * | 1991-04-09 | 1992-10-28 | 刘思澜 | Multi-function floating proportional pressure controlling valve |
| US5617890A (en) * | 1994-09-03 | 1997-04-08 | Robert Bosch Gmbh | Electromagnetically operable pressure-regulation valve |
| CN2400653Y (en) * | 1999-10-28 | 2000-10-11 | 宁波爱水人电器有限公司 | Remanent maintaining electromagnetic water valve |
| CN110486479A (en) * | 2019-08-28 | 2019-11-22 | 西安航天动力研究所 | A kind of big flow three-level guide electromagnetic valve |
-
2019
- 2019-12-04 CN CN201911228988.6A patent/CN111022402B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86203206U (en) * | 1986-05-13 | 1988-02-10 | 陆龙其 | Improved solenoid valve |
| CN1065709A (en) * | 1991-04-09 | 1992-10-28 | 刘思澜 | Multi-function floating proportional pressure controlling valve |
| US5617890A (en) * | 1994-09-03 | 1997-04-08 | Robert Bosch Gmbh | Electromagnetically operable pressure-regulation valve |
| CN2400653Y (en) * | 1999-10-28 | 2000-10-11 | 宁波爱水人电器有限公司 | Remanent maintaining electromagnetic water valve |
| CN110486479A (en) * | 2019-08-28 | 2019-11-22 | 西安航天动力研究所 | A kind of big flow three-level guide electromagnetic valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111022402A (en) | 2020-04-17 |
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