Large-drift-diameter electric plunger four-way valve for airplane demisting switch

Abstract

The invention belongs to the field of electric control valve design, and relates to a large-drift-diameter electric plunger four-way valve for an airplane demisting switch. Comprising an anti-skid gasket, an O-shaped sealing ring, a shell, an electric mechanism, a cover plate, a connecting rod, a transmission shaft, an O-shaped sealing ring, an inner sealing ring, an outer sealing ring, shell fan blades, a right-angle converter, fan blades, a compression spring, a support and an air supply opening. Compared with a traditional working mode that an electric butterfly plate valve is arranged on each of three outlet pipelines for control, four channels are switched, one end is in, three ends are out, the two ends are out simultaneously, the other end is closed, or the two ends are closed simultaneously, and the other end is opened. According to the electric plunger four-way valve, the switching mode of working modes among four channels can be achieved, namely switching of air entering from an evaporation circulation radiator between an air supply pipeline and a demisting pipeline is achieved on a machine, and meanwhile it can be guaranteed that the large drift diameter of an outlet is larger than 80 mm, and the flow resistance among valve body circulation pipelines can be as small as possible.

Description

Technical Field

[0001] The invention belongs to the field of electric control valve design and relates to a large-diameter electric plunger four-way valve used for an aircraft defogger switch. Background Art

[0002] The electric plunger four-way valve is installed in the air duct of the aircraft cabin evaporative circulation system. Its function is to control the rotation of the plunger valve body through the electric mechanism to change the air flow channel, thereby realizing the switching of air between the air supply and defogger pipelines. Due to the limitation of the air supply capacity of the fan of the cabin evaporative circulation system, in order to ensure the maximum air volume at the outlet, the flow resistance needs to be as small as possible when the valve body channel is flowing, so as to reduce the adverse effects of the fan air supply capacity limitation on the defogger and cabin air supply capacity.

[0003] The electric plunger four-way valve consists of an inlet connected to the evaporative cycle radiator, two outlets connected to the cabin air supply port and leading into the cabin, and an outlet pipeline connected to the defogger air supply port. In order to achieve the switching of the air entering from the evaporative cycle radiator between the air supply and defogger pipelines, while ensuring that the outlet has a large diameter of more than 80mm and the flow resistance of the valve body flow pipeline can be as small as possible, and the weight is as light as possible, the traditional implementation method is to add an electric butterfly valve to each of the three outlet pipelines, and control them separately to achieve the switching of air between the air supply and defogger pipelines. However, this method uses three electric mechanisms for control, and it must be able to ensure that the two outlets for supplying air to the cabin can be opened at the same time, which not only increases the complexity and difficulty of control, but also increases the weight of the product and requires a larger space for layout on the aircraft. This poses challenges to the reliability of the product on board and the control, use and maintenance of the aircraft. Based on the difficulties faced in the traditional method of using multiple electric butterfly valves to control the on-off mode of each channel separately to achieve switching between four channels, one end in and three ends out, two ends out at the same time and the other end closed, or two ends closed at the same time and the other end open, a large-diameter electric plunger four-way valve is designed for use in the evaporative circulation system of a certain aircraft cabin to achieve switching of the cabin air supply and defog switch working modes. Summary of the invention

[0004] Purpose of the Invention

[0005] The structural design and implementation of an air-type electric plunger four-way valve with large diameter, small flow resistance, good precision control, high integration and feedback motion-in-place signal for switching the working mode of aircraft cabin air supply and defog switch is proposed.

[0006] The inventive points of the present invention include: a small flow resistance structure between channels, a four-channel reversing structure, a sealing structure, an equal-proportional transmission structure, and signal feedback.

[0007] Technical Solution

[0008] A large-diameter electric plunger four-way valve for aircraft defogger switch, comprising an anti-skid gasket, an O-ring, an O-ring, a housing, an electric mechanism, a cover plate, a connecting rod, a transmission shaft, an O-ring, an inner sealing ring, an outer sealing ring, a housing blade, a right-angle converter, a blade, a compression spring, a bracket, and an air supply port. The blades include a left blade and a right blade. The left blade is a plunger-type structure. A ventilation slot is provided at the bottom of the left blade. The column structure is provided with a defogger port, an air inlet and a guide slot. The right blade is provided with a ventilation slot. The left blade is mounted on one side of the housing. One side of the right-angle converter cooperates with the left blade through a gear spline. One end of the connecting rod is fixedly connected to the slot in the middle of the right-angle converter by a screw. The other end of the connecting rod is fixed to the housing by a screw. The other end of the right-angle converter cooperates with the right blade through a gear spline. The two housing blades are respectively mounted on both sides of the blade and are located at the Inside the shell, a sealing groove is provided on the shell fan blade, and an inner sealing ring is placed in the sealing groove to seal the shell fan blade and the shell. Two air supply ports are fixed on both sides of the shell by screws respectively. A sealing groove is provided on the air supply port, and an outer sealing ring is placed in the sealing groove to seal the air supply port and the shell. One end of the transmission shaft is arranged inside the connecting rod and connected to the input shaft of the right-angle converter, and the axial rotation is converted into lateral rotation through the right-angle converter. The other end of the transmission shaft is connected to the output shaft of the electric mechanism through a gear spline, and the electric mechanism is fixed to the shell by screws.

[0009] Furthermore, it also includes a cover plate, which is arranged on the air inlet of the housing and fixed by screws. The cover plate and the housing are sealed at the fixed connection by an O-ring.

[0010] Furthermore, the cover plate is provided with a mounting hole, which is used to set the sensor, and is double-anti-loosening and locking by means of threads and fuses.

[0011] Furthermore, it also includes a bracket, which is arranged on the shell and is used for fixed connection on the machine.

[0012] Furthermore, the left and right blades are both provided with guide columns, which can effectively achieve fixation and guidance. When the defogger port is opened, the guide column contacts the shell, which can achieve a better sealing effect and prevent gas from entering the cabin air supply ports at both ends.

[0013] Furthermore, the left fan blade column structure is provided with longitudinal ribs. When the defogger port is closed, the longitudinal ribs are in contact with the shell, which can achieve a better sealing effect and prevent gas from entering the defogger port.

[0014] Furthermore, the ventilation groove of the fan blade is a fan-shaped structure, which is compatible with the ventilation hole on the shell fan blade. When the air supply port is closed, the ventilation groove and the ventilation hole are not connected, the air path is closed, and sealing is achieved through the contact surface between the guide column on the fan blade and the shell fan blade, thereby preventing gas from leaking into the air supply port.

[0015] Furthermore, the left blade of the fan blades is specifically a hollow design structure.

[0016] Furthermore, the connecting rod and the housing are statically sealed via an O-ring.

[0017] Furthermore, the connecting rod and the transmission shaft are dynamically sealed by an O-ring.

[0018] Furthermore, a guide groove is designed on the left blade of the fan blade, and the opening of the fan blade is determined by the circumferential length of the guide groove, so as to adjust the flow rate of the air supply ports at both ends.

[0019] Furthermore, it also includes an anti-skid washer, which is arranged between the shell and the screw to prevent the screw from loosening.

[0020] Furthermore, a circle of circumferential protrusions is symmetrically distributed on the output shaft of the right-angle converter to provide a support surface for the compression spring.

[0021] Furthermore, it also includes a clamping spring, one end of which is arranged on the protrusion on the output shaft of the right-angle converter, and the other end is pressed on the fan blade.

[0022] The beneficial effects of this application are:

[0023] The structure and method of the present invention, compared with the traditional method of arranging an electric butterfly valve on each of the three outlet pipelines for control, can realize switching among four-channel passages, one-end inlet and three-end outlet, wherein two ends outlet at the same time and the other end is closed, or two ends are closed at the same time and the other end is open. The electric plunger four-way valve can not only realize the switching of the working modes among the four channels, that is, realize the switching of the air entering from the evaporative cycle radiator between the air supply and defogger pipelines on the machine, but also ensure that the outlet has a large diameter of more than 80 mm and the flow resistance between the valve body flow pipeline can be as small as possible, and can feedback the signal in place, thereby increasing the reliability of the product, reducing the weight, reducing the difficulty of using and controlling the product on the machine, and increasing the maintainability. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the implementation of the structural principle of the present invention;

[0025] Figure 2a It is a specific structural diagram of the present invention;

[0026] Figure 2b It is a partial view of the present invention;

[0027] Figure 3 This is a schematic diagram of the left fan blade;

[0028] Figure 4 This is a schematic diagram of the right fan blade;

[0029] Figure 5 is a schematic diagram of the connecting rod;

[0030] Figure 6 It is a schematic diagram of the transmission shaft;

[0031] Figure 7 It is a schematic diagram of the shell fan blade;

[0032] Figure 8 is a schematic diagram of a right angle converter;

[0033] Among them, it consists of an anti-slip gasket 1, an O-ring 2, an O-ring 3, a shell 4, an electric mechanism 5, a cover plate 6, a connecting rod 7, a transmission shaft 8, an O-ring 9, an inner sealing ring 10, an outer sealing ring 11, a shell fan blade 12, a right-angle converter 13, a fan blade 14, a compression spring 15, a bracket 16, and an air supply port 17. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical scheme and advantages of the implementation of the present invention clearer, the technical scheme in the embodiment of the present invention will be described in more detail in combination with the embodiment of the present invention. In the example, the same or similar reference numerals throughout represent the same or similar originals or elements with the same or similar functions. The described embodiments are part of the embodiments of the present invention, not all of them. The embodiments described below by reference are exemplary and intended to be used to explain the present invention, and should not be construed as limitations on the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in the field without making creative work belong to the scope of protection of the present invention. The following is a detailed description in combination with the embodiments of the present invention.

[0035] A large-diameter electric plunger four-way valve for an aircraft defog switch comprises an anti-slip gasket 1, an O-ring 2, an O-ring 3, a housing 4, an electric mechanism 5, a cover plate 6, a connecting rod 7, a transmission shaft 8, an O-ring 9, an inner sealing ring 10, an outer sealing ring 11, a housing fan blade 12, a right-angle converter 13, a fan blade 14, a compression spring 15, a bracket 16, and an air supply port 17. The fan blade 14 includes a left fan blade and a right fan blade, the left fan blade is a plunger structure, a ventilation slot is provided at the bottom of the left fan blade, a defogger port, an air inlet and a guide slot are provided on the column structure, and a ventilation slot is provided on the right fan blade; the left fan blade is installed on one side of the shell 4, one side of the right-angle converter 13 cooperates with the left fan blade through a gear spline, one end of the connecting rod 7 is fixedly connected with the slot in the middle part of the right-angle converter 13 by a screw, the other end of the connecting rod 7 is fixed to the shell 4 by a screw, and the other end of the right-angle converter 13 cooperates with the right fan blade through a gear spline, and the two shell fan blades 12 are respectively installed on both sides of the fan blade 14 and are located in the shell 4. A sealing groove is provided on the body fan blade 12, and an inner sealing ring 10 is placed in the sealing groove to seal the shell fan blade 12 and the shell 4. Two air supply ports 17 are fixed to both sides of the shell 4 by screws respectively. A sealing groove is provided on the air supply port 17, and an outer sealing ring 11 is placed in the sealing groove to seal the air supply port 17 and the shell 4. One end of the transmission shaft 8 is arranged inside the connecting rod 7 and connected to the input shaft of the right-angle converter 13, and the axial rotation is converted into lateral rotation through the right-angle converter 13. The other end of the transmission shaft 8 is connected to the output shaft of the electric mechanism 5 through a gear spline, and the electric mechanism 5 is fixed to the shell 4 by screws.

[0036] In one embodiment of the present invention, a cover plate 6 is further included, which is disposed on the air inlet of the housing 4 and fixed by screws. The cover plate 6 and the housing 4 are sealed at the fixed connection by an O-ring 3. The cover plates 6 of different types and specifications for installing the sensor mounting holes can be replaced to adapt to the installation and fixation of various types of sensors.

[0037] In one embodiment of the present invention, the cover plate 6 is provided with a mounting hole, which is used to install a sensor, and is double-locked and locked by means of a thread and a fuse. The installed sensor can monitor the gas pressure, temperature and other information in the inlet channel in real time.

[0038] In one embodiment of the present invention, a bracket 16 is further included, which is arranged on the housing 4 and is used for fixed connection on the aircraft. Brackets 16 of different specifications can be designed to adapt to various fixed connection situations on the aircraft.

[0039] In a certain implementation case of the present invention, the left blade and the right blade are both provided with guide columns, which can not only effectively achieve fixation and guidance, but also achieve that when the defogger port is opened, the guide column is in contact with the shell 4, thereby achieving a better sealing effect and preventing gas from entering the cabin air supply port at both ends.

[0040] In a certain implementation case of the present invention, the left fan blade column structure is provided with longitudinal ribs. When the defogger port is closed, the longitudinal ribs are in contact with the shell 4, which can achieve a better sealing effect and prevent gas from entering the defogger port.

[0041] In a certain embodiment of the present invention, the ventilation groove of the fan blade 14 is a fan-shaped structure, which is compatible with the ventilation hole on the shell fan blade 12. When the air supply port is closed, the ventilation groove and the ventilation hole are not connected, the air path is closed, and sealing is achieved through the contact surface between the guide column on the fan blade 14 and the shell fan blade 12, thereby preventing gas from leaking into the air supply port.

[0042] In a certain implementation case of the present invention, the left blade of the fan blade 14 is specifically a hollow design structure, which has the advantage of not only increasing the strength and air intake, but also reducing the weight and flow resistance.

[0043] In a certain implementation case of the present invention, the connecting rod 7 and the housing 4 are statically sealed by an O-ring 9, which can effectively ensure that the gas in the channel will not leak out of the channel.

[0044] In a certain implementation case of the present invention, the connecting rod 7 and the transmission shaft 8 are dynamically sealed by an O-ring 2, which can effectively ensure that the gas in the channel will not leak out of the channel when the transmission shaft rotates.

[0045] In a certain implementation case of the present invention, a guide groove is designed on the left blade of the fan blade 14, and the opening of the fan blade 14 is determined by the circumferential length of the guide groove, so as to adjust the flow rate of the air supply ports at both ends.

[0046] In a certain embodiment of the present invention, an anti-skid washer 1 is further included. The anti-skid washer 1 is arranged between the housing 4 and the screw to prevent the screw from loosening.

[0047] In a certain embodiment of the present invention, a circle of circumferential protrusions is symmetrically distributed on the output shaft of the right-angle converter 13 to provide a support surface for the compression spring.

[0048] In one embodiment of the present invention, a compression spring 15 is further included, one end of which is arranged at the protrusion on the output shaft of the right-angle converter 13, and the other end is pressed on the fan blade 14. A certain compression force is provided to achieve better sealing between the fan blade 14 and the housing fan blade 12 when the air supply port is closed.

[0049] refer to Figure 1-Figure 8 Design product working principle and structure.

[0050] Referring to Figure 2, this structure mainly includes an anti-slip gasket 1, an O-ring 2, an O-ring 3, a housing 4, an electric mechanism 5, a cover plate 6, a connecting rod 7, a transmission shaft 8, an O-ring 9, an inner sealing ring 10, an outer sealing ring 11, a housing fan blade 12, a right-angle converter 13, a fan blade 14, a compression spring 15, a bracket 16, and an air supply port 17.

[0051] The structure of the plunger valve body rotating and the fan blade shielding is adopted. The plunger valve rotates inside the shell to switch between working states. The plunger valve body and the fan blade are made of aluminum alloy and hard anodized, which reduces the weight of the product and increases the strength of the valve body. At the same time, in order to make the plunger fan blade move flexibly, the contact area between the plunger and the shell is minimized to reduce the friction between the plunger valve and the shell.

[0052] The right-angle converter is fixedly connected to the housing and the electric mechanism through a connecting rod. In order to ensure that the clearance between the connecting rod and the housing can be sealed and meet the requirement that no external leakage is allowed, the fitting connection is designed in the form of a static sealing structure, while ensuring the fitting tolerance between the connecting rod and the housing.

[0053] In order to transmit the torque of the output shaft of the electric mechanism to the right-angle converter and drive the plunger valve body to move through the right-angle converter, the transmission shaft is designed. The transmission shaft must ensure the matching clearance between the transmission shaft and the connecting rod, and must ensure that the dynamic seal can be achieved so that the product meets the requirement of no leakage. The dynamic seal at the transmission shaft is designed in the form of a dynamic seal structure, while ensuring the matching tolerance between the transmission shaft and the connecting rod.

[0054] A mechanical pressing feedback mechanism is provided inside the electric mechanism, which can effectively feedback the in-place signal. The feedback in-place signal can be fed back to the host computer through the electrical interface for operation control; different electric mechanisms can also be replaced by different conversion times; the interface types can be diverse and can be changed as needed according to different interface types.

[0055] Inventions and creations of product devices:

[0056] Core invention point: The electric plunger four-way valve structure is designed with four interfaces, an inlet connected to the evaporative cycle radiator, two outlets connected to the cabin air supply port and leading into the cabin, and an outlet pipeline connected to the defogger air supply port. Functionally, it can realize the switching of the inlet air between the two air supply ports and one defogger port, and can also feedback the current working state mode. The valve body of the electric plunger four-way valve adopts a clearance fit compression seal structure to prevent the occurrence of cross-cavity when the air circulates in the channel in various working modes; at the assembly fit contact, the static seal structure of the O-ring and the dynamic seal structure design of the rotation between the shafts are used to prevent the air in the channel from leaking out.

[0057] Secondary invention point 1: The electric plunger four-way valve structure adopts a plunger valve body structure. While the plunger valve and the shell contact and rotate on the surface where they cooperate to increase the effective striped reinforcement ribs to strengthen the valve body strength, it can also effectively reduce the friction between the valve body and the shell when the valve body switches and rotates, and achieve a certain internal sealing effect.

[0058] Secondary invention point 2: When designing the electric plunger four-way valve, in order to realize the conversion of the axial rotation of the electric mechanism into lateral rotation, a diameter converter mechanism with proportional transmission is designed, which can effectively realize the conversion of rotation.

[0059] Secondary invention point 3: In order to prevent air from leaking into the closed outlet channel in each working mode, the electric plunger four-way valve implements a sealing method to prevent air from leaking into the closed outlet channel by adding an elastic retaining ring to the rotating shaft of the plunger valve body to compress the spring and apply force.

[0060] Secondary invention point 4: In order to achieve precise control of the electric plunger four-way valve and effectively feedback the working mode status in each working state, a limit device structure design is added to the plunger valve body to effectively ensure the accuracy of the work in each state.

[0061] Secondary invention point 5: In order to realize the feedback of control signals to the upper control system on the machine, the electric plunger four-way valve is designed with a mechanical pressing feedback mechanism inside the electric mechanism to effectively feedback the working status signal.

[0062] Secondary invention point 6: The electric plunger four-way valve can adjust the switching time of the refrigerant channel flow direction by replacing the electric mechanism with different switching times.

[0063] Secondary invention point 7: The interface of the electric plunger four-way valve can be changed into different interface modes according to actual needs, and has interface diversity.

[0064] It is understood by those skilled in the art that, unless otherwise defined, all terms (including technical terms and scientific terms) used herein have the same meaning as the general understanding of ordinary technicians in the field to which the present invention belongs. It should also be understood that terms such as those defined in general dictionaries should be understood to have the same meaning as in the context of the prior art, and unless defined as here, will not be interpreted with idealized or overly formal meanings. The specific implementation methods described above further describe the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the present invention. Within the spirit and principle of the present invention, any technician familiar with the profession may use the above disclosed technical content to change or modify it into an equivalent embodiment of equivalent changes for application in other fields, but any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the technical solution content of the present invention, any modification, equivalent replacement, improvement, etc., made according to the technical essence of the present invention, should be included in the protection scope of the present invention.

Claims

1. A large-diameter electric plunger four-way valve for aircraft defog switch, characterized in that: It includes an anti-slip gasket, an O-ring, an O-ring, a shell, an electric mechanism, a cover plate, a connecting rod, a transmission shaft, an O-ring, an inner sealing ring, an outer sealing ring, a shell blade, a right-angle converter, a blade, a compression spring, a bracket, and an air supply port; the blade includes a left blade and a right blade, the left blade is a plunger structure, a ventilation slot is provided at the bottom of the left blade, a defogger port, an air inlet and a guide slot are provided on the column structure, and a ventilation slot is provided on the right blade; the left blade is installed on one side of the shell, one side of the right-angle converter cooperates with the left blade through a gear spline, one end of the connecting rod is fixedly connected to the slot in the middle of the right-angle converter by a screw, the other end of the connecting rod is fixed to the shell by a screw, and the right-angle converter is also provided. One end cooperates with the right fan blade through a gear spline, and the two shell fan blades are respectively installed on both sides of the fan blade and are located in the shell. A sealing groove is provided on the shell fan blade, and an inner sealing ring is placed in the sealing groove to seal the shell fan blade and the shell. Two air supply ports are respectively fixed on both sides of the shell by screws, and a sealing groove is provided on the air supply port, and an outer sealing ring is placed in the sealing groove to seal the air supply port and the shell. One end of the transmission shaft is arranged inside the connecting rod and is connected to the input shaft of the right-angle converter, and the axial rotation is converted into lateral rotation through the right-angle converter. The other end of the transmission shaft is connected to the output shaft of the electric mechanism through a gear spline, and the electric mechanism is fixed to the shell by screws.

2. The four-way valve according to claim 1, characterized in that: It also includes a cover plate, which is arranged on the air inlet of the shell and fixed by screws; an O-ring is used to seal the fixed connection between the cover plate and the shell.

3. The four-way valve according to claim 2, characterized in that: The cover plate is provided with a mounting hole, which is used to set the sensor, and is double-anti-loosening and locking by means of threads and fuses.

4. The four-way valve according to claim 3, characterized in that: It also includes a bracket, which is arranged on the shell and is used for fixed connection on the machine.

5. The four-way valve according to claim 4, characterized in that: The left and right blades are both provided with guide columns, which can effectively achieve fixation and guidance. When the defogger port is opened, the guide column contacts the shell, which can achieve a better sealing effect and prevent gas from entering the cabin air supply ports at both ends.

6. The four-way valve according to claim 5, characterized in that: The left fan blade column structure is provided with longitudinal ribs. When the defogger port is closed, the longitudinal ribs are in contact with the shell, which can achieve a better sealing effect and prevent gas from entering the defogger port. The ventilation groove of the fan blade is a fan-shaped structure, which is adapted to the ventilation hole on the shell fan blade. When the air supply port is closed, the ventilation groove is not connected to the ventilation hole, the air path is closed, and sealing is achieved through the contact surface between the guide column on the fan blade and the shell fan blade, thereby preventing gas from leaking into the air supply port.

7. The four-way valve according to claim 6, characterized in that: The left blade of the fan blade is specifically a hollow design structure; the connecting rod and the shell are statically sealed by an O-ring; and the connecting rod and the transmission shaft are dynamically sealed by an O-ring.

8. The four-way valve according to claim 7, characterized in that: A guide groove is designed on the left blade of the fan blade, and the opening of the fan blade is determined by the circumferential length of the guide groove, so as to adjust the flow rate of the air supply ports at both ends.

9. The four-way valve according to claim 8, characterized in that: It also includes an anti-skid washer, which is arranged between the housing and the screw to prevent the screw from loosening; a circle of circumferential protrusions is symmetrically distributed on the output shaft of the right-angle converter to provide a support surface for the compression spring.

10. The four-way valve according to claim 9, characterized in that: It also includes a compression spring, one end of which is arranged at the protrusion on the output shaft of the right-angle converter, and the other end of which is compressed on the fan blade.

Images