CN115750804A - Valve with continuously adjustable outlet pressure and pressure control method - Google Patents
Valve with continuously adjustable outlet pressure and pressure control method Download PDFInfo
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- CN115750804A CN115750804A CN202211317564.9A CN202211317564A CN115750804A CN 115750804 A CN115750804 A CN 115750804A CN 202211317564 A CN202211317564 A CN 202211317564A CN 115750804 A CN115750804 A CN 115750804A
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Abstract
The invention belongs to the field of design of an aircraft air source system, and particularly relates to a valve with continuously adjustable outlet pressure and a pressure control method. Generally, the pressure regulating and shutoff valve adopts a pneumatic mechanical regulating structure of an electromagnetic valve and a pilot valve, and the outlet pressure can only be provided with one pressure point and does not have the continuously adjustable function. The controller receives pressure signals of the outlet of the pressure regulating valve fed back by the pressure sensor, and adjusts the control current of the torque motor in a closed loop mode. And leading the outlet pressure of the pressure regulating valve to a feedback cavity of the pressure regulating valve actuator through a pressure leading port, comparing the pressure of the feedback cavity with the pressure of the control cavity, regulating the opening angle of a butterfly plate of the butterfly valve, and finally balancing the pressure of the feedback cavity and the pressure of the control cavity to control the outlet pressure of the pressure regulating valve. The controller is used for closed-loop control, the outlet pressure is continuously adjustable, and the control precision is high; and each component of the pressure regulating valve is structurally designed, so that the inheritance is good and the reliability is high.
Description
Technical Field
The invention belongs to the field of design of an aircraft air source system, and particularly relates to a valve with continuously adjustable outlet pressure and a pressure control method.
Background
In order to improve the economy and safety of air entraining, the outlet pressure of a modern aircraft air source system is usually provided with 2 pressure adjusting points or the outlet pressure is continuously adjustable, and a pressure regulating valve in the air source system is responsible for regulating the outlet pressure of the air source system.
Generally, the pressure regulating and shutoff valve adopts a pneumatic mechanical regulating structure of an electromagnetic valve and a pilot valve, and the outlet pressure can only be provided with one pressure point and does not have the continuously adjustable function.
In another scheme, the pressure regulating shutoff valve is controlled by an electromagnetic valve and a torque motor together, the electromagnetic valve controls the shutoff function, and the torque motor controls the regulating function. The system needs to supply power to the electromagnetic valve and the torque motor and adjust the power at the same time, and the configuration has the advantages of multiple used components, heavier weight and lower reliability.
Disclosure of Invention
The invention provides a valve with continuously adjustable outlet pressure, which has the functions of valve shutoff and continuously adjustable outlet pressure on the premise of only adopting a torque motor.
The invention provides a valve with continuously adjustable outlet pressure, which adopts a piston type actuator assembly to control a butterfly valve assembly in a pipeline, wherein an inlet area of a butterfly valve channel is provided with a pressure leading port I, an outlet area of the butterfly valve channel is provided with a pressure leading port II and a pressure leading port III, the pressure leading port I is communicated with an air inlet of a pressure reducing valve, an air outlet of the pressure reducing valve is divided into two paths, one path is communicated with the air inlet of a pneumatic control cut-off valve, and the other path is communicated with the air inlet of a servo control assembly; an air outlet of the pressure reducing valve is communicated with a first air inlet of the two-way valve, a pressure leading port II is communicated with a second air inlet of the two-way valve, and an air outlet of the two-way valve is communicated with an actuator feedback cavity C in the actuator assembly; the control port of the servo control assembly is divided into two paths, one path is communicated with the control end of the pneumatic control cut-off valve, and the other path is communicated with an actuator control cavity B in the actuator assembly; the pressure sensor collects pressure signals through the pressure leading port III and sends the pressure signals to the controller, and the controller controls the outlet pressure of the adjustable valve by adjusting the gas pressure output by the servo control assembly.
Advantageously, the butterfly valve assembly further comprises a butterfly valve plate and a butterfly valve rocker arm.
Advantageously, the actuator assembly comprises, inside the housing, an actuator piston and an actuator actuation rod, the actuator actuation rod passing through the butterfly valve passage to be hinged to the butterfly valve rocker arm; the actuating piston divides the housing into an actuator control chamber B and an actuator feedback chamber C.
Advantageously, the servo control assembly has a servo control assembly control chamber a having a servo control assembly gas inlet, a servo control assembly gas outlet, a servo control assembly control port, an internal spin plate, and an external torque motor, the gas pressure at the servo control assembly control port being controlled by the torque motor adjusting the angle of the spin plate.
Advantageously, the controller outputs a control current to the torque motor.
Advantageously, the servo control assembly, the pressure reducing valve and the pneumatic cut-off valve constitute an actuation control assembly.
Advantageously, when the controller controls the output of the servo control assembly to be at a lower pressure than the closing pressure of the pneumatically controlled shut-off valve, the pressure of the actuator feedback chamber C is greater than the pressure of the actuator control chamber B and the butterfly valve assembly is controlled to be in the closed state.
Advantageously, when the controller controls the air pressure output by the servo control assembly to be not lower than the closing pressure of the pneumatic control cut-off valve, the opening size of the butterfly valve assembly is adjusted by controlling the air pressure output by the servo control assembly.
The invention also provides a pressure control method of the valve with continuously adjustable outlet pressure, which adopts the valve with continuously adjustable outlet pressure, wherein in an initial state, a controller controls the air pressure output by the servo control assembly to be lower than the closing pressure of the pneumatic control cut-off valve, and a butterfly valve assembly is controlled to be in a closing state;
when continuing to rise the atmospheric pressure of servo control subassembly output is not less than the closing pressure of gas accuse trip valve, the gas of servo control subassembly output gets into actuator control chamber B, the gas of drawing pressure port II and drawing the gas of leading out gets into actuator feedback chamber C opens the actuator subassembly to balanced position to will open the butterfly valve subassembly at fixed aperture.
Advantageously, when the outlet pressure becomes greater, the pressure of the actuator feedback chamber C increases, thus driving the butterfly valve assembly to decrease in opening; when the outlet pressure becomes smaller, the pressure of the actuator feedback cavity C is reduced, so that the butterfly valve component is driven to increase the opening degree.
The servo control assembly uses a torque motor as an adjusting mechanism, a controller adjusts the control current of the torque motor in a closed loop mode by receiving a pressure regulating valve outlet pressure signal fed back by a pressure sensor, so that an output shaft of the torque motor rotates by a certain angle, the areas of an air inlet and an air outlet of the servo control assembly are adjusted by the rotation angle of the output shaft of the torque motor, and therefore certain continuously adjustable pilot control pressure is output, the pilot control pressure enters a control cavity of an actuator to push an actuating piston to drive a butterfly valve and a butterfly plate to rotate by a certain angle, the flow area of a butterfly valve channel is determined by the rotation angle of the butterfly plate, and the throttling effect of the flow area achieves the purpose of adjusting the pressure regulating valve outlet pressure.
And leading the outlet pressure of the pressure regulating valve to a feedback cavity of the pressure regulating valve actuator through a pressure leading port, comparing the pressure of the feedback cavity with the pressure of the control cavity, regulating the opening angle of a butterfly plate of the butterfly valve, and finally balancing the pressure of the feedback cavity and the pressure of the control cavity to control the outlet pressure of the pressure regulating valve.
When the pressure of the control cavity is fixed, if the pressure of the outlet of the pressure regulating valve is higher, the pressure of the feedback cavity overcomes the pressure of the control cavity, so that the angle of a butterfly plate of the butterfly valve is reduced, and the pressure of the outlet of the pressure regulating valve is reduced to the regulated pressure; if the pressure of the outlet of the pressure regulating valve is low, the pressure acting force of the control cavity overcomes the pressure of the feedback cavity, so that the angle of the butterfly plate of the butterfly valve is enlarged, and the pressure of the outlet of the pressure regulating valve is increased to the regulated pressure.
The inlet pressure of the pressure regulating valve is led to the fixed-value pressure reducing valve through the pressure leading port, and the fixed-value pressure reducing valve adjusts the inlet pressure to a certain pressure so as to provide a certain and stable inlet pressure for the servo control assembly. The pressure adjusted by the pressure reducing valve in the pressure adjusting valve is led to the pneumatic control cut-off valve, and when the servo control assembly does not output pressure, the pressure adjusted by the pressure reducing valve enters the actuator feedback cavity to enable the product to be reliably closed, so that the product is turned off. Only when the pressure output by the servo control assembly is larger than a set value, the pressure makes the pneumatic control cut-off valve reverse and cuts off the pressure adjusted by the pressure reducing valve to enter the air passage of the feedback cavity of the actuator, so that the pressure of the product can be normally regulated.
The controller is used for closed-loop control, the outlet pressure is continuously adjustable, and the control precision is high; and each component of the pressure regulating valve is structurally designed, so that the inheritance is good and the reliability is high.
Drawings
FIG. 1 is a schematic view of the pressure regulating valve of the present invention in a closed condition;
FIG. 2 is a schematic view of the pressure regulating shutter of the present invention in an open state;
FIG. 3 is a schematic view of the butterfly plate in a closed state;
fig. 4 is a schematic view of the butterfly plate in an open state.
Wherein, 100-butterfly valve component, 101-butterfly valve channel, 102-butterfly valve plate, 103-butterfly valve rocker arm, 200-actuator component, 201-actuating piston, 202-actuator actuating rod, 300-servo control component, 301-servo control component air inlet, 302-rotary plate, 303-servo control component air outlet, 304-torque motor, 305-servo control component control port, 400-pressure reducing valve, 500-two-way valve, 600-pressure sensor, 700-pneumatic control shut-off valve, 800-actuating control component
Servo control assembly control cavity A, actuator control cavity B, actuator feedback cavity C, pressure leading port I, pressure leading port II and pressure leading port III
Detailed Description
It should be noted that, in case of conflict, the embodiments and features of the embodiments of the present invention may be combined with each other, and the respective embodiments may be referred to and cited with each other. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
Referring to fig. 1-2, the valve in the embodiment of the present invention is composed of a butterfly valve assembly 100, an actuator assembly 200, a servo control assembly 300, a pressure reducing valve 400, a two-way valve 500, a pressure sensor 600, a pneumatic cut-off valve and an actuation control assembly 800.
The butterfly valve assembly 100 is composed of a butterfly valve channel 101, a butterfly valve plate 102 and a butterfly valve rocker arm 103, the butterfly valve rocker arm 103 is fixedly connected with the butterfly valve plate 102, and the butterfly valve rocker arm 103 can drive the butterfly valve plate 102 to rotate. In the closed state, as shown in fig. 1, the butterfly valve plate 102 divides the butterfly valve passage 101 into two chambers, so that the butterfly valve inlet and outlet are blocked and the inlet pressure cannot pass to the outlet. Referring to fig. 2, when the butterfly valve plate 102 rotates a certain angle, a flow passage is formed between the butterfly valve plate 102 and the butterfly valve passage 101, the gas can flow to the outlet, and the flow area of the flow passage is in a certain relationship with the rotation angle of the butterfly valve plate 102. When the inlet pressure is constant, the outlet pressure has a certain relationship with the rotation angle of the butterfly valve plate 102, and the larger the opening angle of the butterfly valve plate 102 is, the larger the outlet pressure is.
An inlet area of the butterfly valve channel 101 is provided with a pressure guide port I, and an outlet area of the butterfly valve channel 101 is provided with a pressure guide port II and a pressure guide port III.
The actuator assembly 200 is composed of a housing, an actuating piston 201 and an actuator actuating rod 202 inside the housing, and the actuating piston 201 divides the housing into an actuator control cavity B and an actuator feedback cavity C.
The actuation control assembly 800 is comprised of a servo control assembly 300, a pressure reducing valve 400, and a pneumatically controlled shut-off valve 700.
The servo control assembly 300 is comprised of a servo control assembly control chamber a, a servo control assembly inlet 301, a servo control assembly outlet 303, a servo control assembly control port 305, an internal spin plate 302, and an external torque motor 304.
Wherein, the inlet pressure enters the reducing valve 400 through the pressure leading port I, and the reducing valve 400 adjusts the inlet pressure to a certain pressure. The pressure adjusted by the pressure reducing valve 400 enters the air inlet of the pneumatically controlled shut-off valve 700 and the servo control assembly air inlet 301 of the servo control assembly 300 at the same time.
Referring to fig. 1, the default state of the pneumatic control cut-off valve 700 is that the air passage is communicated under the action of the spring force, the air outlet of the pneumatic control cut-off valve 700 is communicated with the first air inlet of the two-way valve 500, when the pressure of the pressure guide port ii is smaller than the pressure of the air outlet of the pneumatic control cut-off valve 700, the air passing through the pressure reducing valve 400 enters the actuator feedback cavity C through the two-way valve 500, and the actuator actuating rod 202 is pushed to move upwards to keep or enable the valve to be in the closed position because the pressure of the pressure reducing valve 400, namely the pressure of the cavity C is higher than the pressure of the cavity B.
When the pressure in the control cavity A of the servo control assembly is higher than a certain value, the pressure of the cavity A enters the control port of the pneumatic control stop valve 700 and overcomes the spring force to close the pneumatic control stop valve 700, no pressure exists at the upper end of the two-way valve at the moment, and the pressure of the pressure guide port II enters the actuator feedback cavity C through the two-way valve 500.
The servo control assembly 300 is controlled by a controller to control the pressure of the servo control assembly control chamber a to a desired pressure. Referring to fig. 2, the pressure gas in the control cavity a of the servo control assembly enters the cavity B of the actuator control cavity of the actuator assembly 200, the pressure of the cavity B is equal to the pressure of the control cavity a, the pressure of the cavity B pushes the actuating piston 201 and the actuating rod 202 of the actuator to move downwards, the actuating rod 202 of the actuator drives the rocker arm 103 to rotate, the rocker arm 103 drives the butterfly plate 102 to rotate, and at this time, the pressure regulating valve is opened by a certain angle.
As shown in fig. 4, when the butterfly plate 102 is opened at an angle, a passage is formed between the butterfly plate 102 and the butterfly valve passage 101 through which the intake pressure enters the passage 101 downstream to form the outlet pressure. And because the passage has a smaller area than the butterfly valve passage, a throttling effect is formed, and when the inlet pressure is constant, the downstream outlet pressure has a certain relation with the rotation angle of the butterfly plate 102. The outlet pressure of the butterfly valve channel 101 is led to the cavity C of the actuator assembly 200 through the pressure leading port II, when the outlet pressure rises to a certain value, the pressure of the cavity C and the pressure of the cavity B are balanced, so that the piston 201 does not move downwards any more, and the outlet pressure of the valve and the pressure of the cavity B are in a certain proportional relation.
The rotational angle of the output shaft of the torque motor 304 is proportional to its control current. The outlet pressure of the butterfly valve channel 101 is led to the pressure sensor 600 through the pressure leading port III, the pressure signal of the pressure sensor 600 is fed back to the controller, and the controller controls the current of the torque motor 304 according to the feedback of the pressure signal of the pressure sensor 600 so as to control the output shaft of the torque motor 304 to rotate for a certain angle. The output shaft of the torque motor 304 is connected to the shaft of the rotating plate 302, and the output shaft of the torque motor 304 can drive the rotating plate 302 to rotate. When the rotary plate 302 is in a default state, the air inlet 301 of the servo control assembly is blocked, the air outlet 303 of the servo control assembly is opened, and at the moment, the pressure of the control cavity A of the servo control assembly is the minimum value. When the pressure A of the control cavity of the servo control assembly needs to be increased, the controller controls the output shaft of the torque motor 304 to rotate by a certain angle to drive the rotating plate 302 to rotate, the flow area of the air inlet 301 is increased, the flow area of the air outlet 303 is reduced, and the pressure of the control cavity A of the servo control assembly can be continuously adjusted by controlling the change of the flow areas of the air inlet 301 and the air outlet 303. The pressure of the actuator control cavity B is equal to that of the servo control assembly control cavity A, and the outlet pressure of the pressure regulating valve is in a certain proportion to that of the actuator control cavity B, so that the outlet pressure of the pressure regulating valve and the current of the torque motor 304 are in a certain relation, and the outlet pressure of the pressure regulating valve is continuously adjustable by controlling the current of the torque motor 304.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solutions of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive various equivalent modifications or substitutions within the technical scope of the present invention, and these modifications or substitutions should be covered within the scope of the present invention.
Claims (10)
1. The valve with continuously adjustable outlet pressure is characterized in that: the valve adopts a piston type actuator assembly (200) to control a butterfly valve assembly (100) in a pipeline, an inlet area of a butterfly valve channel (101) is provided with a pressure guide port I, an outlet area of the butterfly valve channel (101) is provided with a pressure guide port II and a pressure guide port III, the pressure guide port I is communicated with an air inlet of a pressure reducing valve (400), an air outlet of the pressure reducing valve (400) is divided into two paths, one path is communicated with an air inlet of a pneumatic control cut-off valve (700), and the other path is communicated with an air inlet of a servo control assembly (300); an air outlet of the pressure reducing valve (400) is communicated with a first air inlet of the two-way valve (500), a pressure leading port II is communicated with a second air inlet of the two-way valve (500), and an air outlet of the two-way valve (500) is communicated with an actuator feedback cavity C in the actuator assembly (200); the control port of the servo control assembly (300) is divided into two paths, one path is communicated with the control end of the pneumatic control cut-off valve (700), and the other path is communicated with an actuator control cavity B in the actuator assembly (200); the pressure sensor (600) collects a pressure signal through a pressure leading port III and sends the pressure signal to the controller, and the controller controls the outlet pressure of the adjustable valve by adjusting the gas pressure output by the servo control assembly (300).
2. An outlet pressure continuously adjustable shutter according to claim 1, characterized in that: the butterfly valve assembly (100) further comprises a butterfly valve plate (102) and a butterfly valve rocker arm (103).
3. Valve according to claim 2, characterized in that: the actuator assembly (200) comprises an actuating piston (201) and an actuator actuating rod (202) in a shell, and the actuator actuating rod (202) penetrates through a butterfly valve channel (101) and is hinged with the butterfly valve rocker arm (103); the actuating piston (201) divides the housing into an actuator control chamber B and an actuator feedback chamber C.
4. A continuously adjustable outlet pressure shutter according to claim 3, characterized in that: the servo control assembly (300) is provided with a servo control assembly control cavity A which is provided with a servo control assembly air inlet (301), a servo control assembly air outlet (303), a servo control assembly control port (305), an internal rotating plate (302) and an external torque motor (304), and the angle of the rotating plate (302) is adjusted through the torque motor (304) to control the air pressure of the servo control assembly control port (305).
5. Valve according to claim 4, characterized in that: the controller outputs a control current to a torque motor (304).
6. An outlet pressure continuously adjustable shutter according to claim 5, characterized in that: the servo control component (300), the pressure reducing valve (400) and the pneumatic control cut-off valve (700) form an actuating control component (800).
7. An outlet pressure continuously adjustable shutter according to any one of claims 1-6, characterized in that: when the air pressure output by the servo control assembly (300) under the control of the controller is lower than the closing pressure of the pneumatic control cut-off valve (700), the pressure of the actuator feedback cavity C is higher than that of the actuator control cavity B, and the butterfly valve assembly (100) is controlled to be in a closed state.
8. An outlet pressure continuously adjustable shutter according to any one of claims 1-6, characterized in that: when the air pressure output by the servo control assembly (300) is controlled by the controller to be not lower than the closing pressure of the pneumatic control cut-off valve (700), the opening size of the butterfly valve assembly (100) is adjusted by controlling the air pressure output by the servo control assembly (300).
9. A pressure control method of an outlet pressure continuously adjustable valve using the outlet pressure continuously adjustable valve as claimed in any one of claims 1 to 8, characterized in that: in the initial state, the controller controls the air pressure output by the servo control assembly (300) to be lower than the closing pressure of the pneumatic control cut-off valve (700), and the butterfly valve assembly (100) is controlled to be in the closing state;
when the air pressure output by the servo control assembly (300) is continuously increased to be not lower than the closing pressure of the pneumatic control cut-off valve (700), the air output by the servo control assembly (300) enters the actuator control cavity B, the air led out by the pressure leading port II enters the actuator feedback cavity C, the actuator assembly (200) is opened to a balance position, and therefore the butterfly valve assembly (100) is opened to a fixed opening degree.
10. The pressure control method according to claim 9, characterized in that: when the outlet pressure is increased, the pressure of the actuator feedback cavity C is increased, so that the butterfly valve component (100) is driven to reduce the opening degree; when the outlet pressure becomes lower, the pressure of the actuator feedback chamber C is reduced, thereby driving the butterfly valve component (100) to increase the opening degree.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211317564.9A CN115750804A (en) | 2022-10-26 | 2022-10-26 | Valve with continuously adjustable outlet pressure and pressure control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211317564.9A CN115750804A (en) | 2022-10-26 | 2022-10-26 | Valve with continuously adjustable outlet pressure and pressure control method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115750804A true CN115750804A (en) | 2023-03-07 |
Family
ID=85353364
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211317564.9A Pending CN115750804A (en) | 2022-10-26 | 2022-10-26 | Valve with continuously adjustable outlet pressure and pressure control method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115750804A (en) |
-
2022
- 2022-10-26 CN CN202211317564.9A patent/CN115750804A/en active Pending
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