Hydraulic-controlled butterfly valve and engine control system using the same

Abstract

The present invention relates to the field of butterfly valves, and in particular to a hydraulically controlled butterfly valve and an engine control system using the hydraulically controlled butterfly valve. The hydraulically controlled butterfly valve comprises a valve body and a valve plate arranged in the valve body, an actuating assembly is arranged on the valve body, the actuating assembly comprises an actuating housing and a rotor rotatably assembled in the actuating housing for driving the valve plate to rotate, the rotor and the valve body form a control chamber, the rotor comprises a rotating shaft and power blades arranged on the radial side of the rotating shaft, and the actuating housing is also provided with a damping channel for connecting the first control part with the second control part. When the engine control system is working, the fluid pressure difference between the first control part and the second control part in the butterfly valve is controlled by a fluid circulation control device, so that the fluid in the first control part and the second control part can circulate with the external fluid through the damping channel, thereby avoiding the fluid in the control chamber being in a high temperature state for a long time, and solving the problem that the current butterfly valve used in the aircraft engine system cannot guarantee the safety performance of the butterfly valve.

Description

Technical Field

[0001] The invention relates to the field of butterfly valves, in particular to a hydraulically controlled butterfly valve and an engine control system using the hydraulically controlled butterfly valve. Background Art

[0002] At present, the reliability and safety requirements of butterfly valves in aircraft engine systems are very high. Traditional butterfly valves generally adopt a piston linear actuation control method. The piston linear actuation assembly drives the butterfly plate to rotate through a connecting rod mechanism. The butterfly valve using this actuation method consumes more energy to achieve actuation, has low power, many parts, low reliability, high failure rate, large external dimensions of the actuation assembly, and large weight of the butterfly valve. A Chinese patent with authorization announcement number CN104246142B and authorization announcement date 2016.10.26 discloses a butterfly valve for aircraft engines, the butterfly valve includes a valve body, an actuation assembly is arranged on the valve body, the actuation assembly includes a housing and a rotor arranged in the housing, the rotor includes at least two radially extending rotor guide vanes, the rotor is fixed to a rotating shaft extending out of the housing, so that the rotor can drive the rotating shaft to rotate, and a valve plate structure is arranged on the rotating shaft to control the opening or closing of the butterfly valve. The housing is provided with stator guide vanes that cooperate with the rotor guide vanes. The housing, stator guide vanes and rotor guide vanes form four chambers, namely the first chamber, the second chamber, the third chamber and the fourth chamber, wherein the first chamber and the third chamber, the second chamber and the fourth chamber are respectively connected through channels arranged on the rotor, and the first chamber and the second chamber are both provided with fuel ports connected to the fuel pipeline, wherein the rotor guide vanes are the power vanes arranged on the rotor, and when there is a pressure difference between the pressure in the first chamber and the second chamber, under the action of liquid pressure, the rotor guide vanes rotate under the pressure, driving the rotating shaft to rotate, and then controlling the opening and closing of the butterfly valve. Although this butterfly valve can ensure reliability, when this butterfly valve is used in the field of aircraft engines, it is affected by the ambient temperature, the engine temperature is high, and the fuel in the first chamber and the second chamber of the butterfly valve is in a high temperature state for a long time, and the safety performance of the butterfly valve is difficult to ensure. Summary of the invention

[0003] The purpose of the present invention is to provide a hydraulically controlled butterfly valve to solve the problem that the current butterfly valves used in aircraft engine systems cannot ensure the safety performance of the butterfly valves; in addition, the purpose of the present invention is also to provide an engine control system using the above-mentioned hydraulically controlled butterfly valve.

[0004] To achieve the above-mentioned purpose, the technical solution of the engine control system of the present invention is as follows: the engine control system includes a fluid pipeline and a hydraulically controlled butterfly valve arranged on the fluid pipeline, the hydraulically controlled butterfly valve includes a valve body and a valve plate arranged in the valve body, an actuating assembly is arranged on the valve body, the actuating assembly includes an actuating housing and a rotor rotatably assembled in the actuating housing for driving the valve plate to rotate, the rotor and the actuating housing form a control chamber, the rotor includes a rotating shaft and power leaves arranged on the radial side of the rotating shaft, the power leaves extend into the control chamber and separate the control chamber, the control chamber includes a first control part and a second control part separated by the power leaves, the actuating housing is also provided with a first control interface and a second control interface respectively communicating with the first control part and the second control part, the actuating housing is also provided with a damping channel communicating with the first control part and the second control part, and the engine control system also includes a fluid circulation control device communicating with the first control part and the second control part so that the first control part and the second control part circulate with the external fluid through the damping channel.

[0005] Furthermore, in order to facilitate the processing of the damping channel, a throttling component is provided in the damping channel. The damping effect of the damping channel is achieved by installing the throttling component, which facilitates processing.

[0006] Furthermore, in order to simplify the structure of the valve body, the damping channel is connected to the fluid circulation control device through the first control interface and the second control interface, avoiding the need to set up an additional circulation opening, simplifying the structure and reducing manufacturing costs.

[0007] Furthermore, in order to improve the stability of the rotor during rotation, an auxiliary control chamber is also provided on the actuating housing, and an actuating housing sealing portion is provided on the actuating housing, which cooperates with the rotating shaft seal to separate the control chamber and the auxiliary control chamber. An auxiliary power leaf is also provided on the rotating shaft, and the auxiliary power leaf extends into the auxiliary control chamber to separate the auxiliary control chamber. The auxiliary control chamber includes a third control part and a fourth control part separated by the auxiliary power leaf, and the first, second, third and fourth control parts are arranged in sequence along the circumferential direction of the rotating shaft, wherein a first connecting channel connecting the third control part and the first control part and a second connecting channel connecting the second control part and the fourth control part are provided on the rotating shaft, and the first connecting channel is isolated from the second connecting channel, and the actuating housing sealing portion has a positioning arc surface adapted to the outer circumferential surface of the rotating shaft, and through the positioning cooperation between the positioning arc surface and the rotating shaft, the rotor is not easy to shake during rotation and has good stability.

[0008] Furthermore, in order to facilitate the control of the rotation of the rotor, the first control part is a constant pressure control part, and the first control interface is connected to a control valve that controls the pressure in the first control part. During the adjustment process, only the pressure in the second control part needs to be adjusted, which facilitates adjustment and control.

[0009] The technical solution of the hydraulically controlled butterfly valve of the present invention is as follows: the hydraulically controlled butterfly valve includes a valve body and a valve plate arranged in the valve body, an actuating assembly is provided on the valve body, the actuating assembly includes an actuating housing and a rotor rotatably assembled in the actuating housing for driving the valve plate to rotate, the rotor and the actuating housing form a control chamber, the rotor includes a rotating shaft and power blades arranged on the radial side of the rotating shaft, the power blades extend into the control chamber and separate the control chamber, the control chamber includes a first control part and a second control part separated by the power blades, the actuating housing is also provided with a first control interface and a second control interface respectively communicated with the first control part and the second control part, and the actuating housing is also provided with a damping channel that communicates the first control part with the second control part.

[0010] Furthermore, a throttling component is provided in the damping channel.

[0011] Furthermore, the damping channel is communicated with an external fluid pipeline through a first control interface and a second control interface.

[0012] Furthermore, an auxiliary control chamber is provided on the actuating housing, and an actuating housing sealing portion is provided on the actuating housing, which cooperates with the rotating seal of the rotating shaft to separate the control chamber and the auxiliary control chamber. An auxiliary power leaf is also provided on the rotating shaft, and the auxiliary power leaf extends into the auxiliary control chamber to separate the auxiliary control chamber. The auxiliary control chamber includes a third control part and a fourth control part separated by the auxiliary power leaf, and the first, second, third and fourth control parts are arranged in sequence along the circumferential direction of the rotating shaft, wherein a first connecting channel connecting the third control part with the first control part and a second connecting channel connecting the second control part with the fourth control part are provided on the rotating shaft, and the first connecting channel is isolated from the second connecting channel, and the actuating housing sealing portion has a positioning arc surface adapted to the outer circumferential surface of the rotating shaft.

[0013] Furthermore, the first control part is a constant pressure control part.

[0014] Beneficial effects of the present invention: A damping channel is arranged between the two control parts of the butterfly valve of the engine control system of the present invention. When the engine control system is working, the fluid pressure difference between the first control part and the second control part of the butterfly valve is controlled by the fluid circulation control device, so that the fluid in the first control part and the second control part can circulate with the external fluid through the damping channel, avoiding the fluid in the control cavity from being in a high temperature state for a long time, thereby solving the problem that the safety performance of the butterfly valve cannot be guaranteed for the butterfly valve used in the current aircraft engine system. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of a specific embodiment of the hydraulically controlled butterfly valve of the present invention;

[0016] Figure 2 It is a partial structural view of a specific embodiment of the hydraulically controlled butterfly valve of the present invention;

[0017] Figure 3 yes Figure 2 Cross-sectional view of the center edge CC (when the hydraulically controlled butterfly valve is in the open state);

[0018] Figure 4 yes Figure 2 Cross-sectional view of the middle edge EE (when the hydraulically controlled butterfly valve is in the closed state);

[0019] Figure 5 yes Figure 2 Sectional view along DD (rotor not shown);

[0020] Figure 6 It is a schematic diagram of the control principle of a power device corresponding to the hydraulically controlled butterfly valve in a specific embodiment of the hydraulically controlled butterfly valve of the present invention;

[0021] In the figure: 1. valve body; 11. actuating housing; 12. rotor mounting part; 121. actuating housing sealing part; 1211. positioning arc surface; 122. sealing member; 123. damping channel; 124. throttling nozzle; 13. signal control part; 14. first control interface; 15. second control interface; 16. second control chamber connecting port; 2. rotor; 21. rotating shaft; 211. first connecting channel; 212. second connecting channel; 22. power blade; 23. auxiliary power blade; 3. control chamber; 31. first control part; 32. second control part; 4. auxiliary control chamber; 41. third control part; 42. fourth control part. DETAILED DESCRIPTION

[0022] The embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0023] The specific embodiment of the hydraulically controlled butterfly valve of the present invention is as follows Figures 1 to 6 As shown, the hydraulically controlled butterfly valve comprises a valve body 1 and a valve plate disposed in the valve body 1. The valve body 1 is provided with an actuating assembly for driving the valve plate to rotate. The actuating assembly comprises an actuating housing 11 and a rotor 2 rotatably assembled in the actuating housing 11 for driving the valve plate to rotate. In this embodiment, the actuating housing 11 comprises a rotor mounting portion 12 and a signal control portion 13, which are separately disposed. The signal control portion 13 is provided with an angular displacement sensor for detecting the state of the hydraulically controlled butterfly valve.

[0024] like Figure 3As shown, the rotor mounting part 12 and the rotor 2 enclose a control chamber 3 and an auxiliary control chamber 4. The rotor 2 includes a rotating shaft 21, a power blade 22 and an auxiliary power blade 23 arranged on the radial side of the rotating shaft 21. The power blade 22 extends into the control chamber 3 and divides the control chamber 3 into a first control part 31 and a second control part 32. The actuating housing 11 is also provided with a first control interface 14 and a second control interface 15 respectively communicating with the first control part 31 and the second control part 32. The first control interface 14 and the second control interface 15 are used to connect with the fluid pipeline. The auxiliary power blade 23 extends into the auxiliary control chamber 4 and divides the auxiliary control chamber 4 into a third control part 41 and a fourth control part 42. The first, second, third and fourth control parts are arranged in sequence along the circumferential direction of the rotating shaft 21. The rotating shaft 21 is provided with a first connecting channel 211 connecting the third control part 41 with the first control part 31 and a second connecting channel 212 connecting the second control part 32 with the fourth control part 42. The first connecting channel 211 is isolated from the second connecting channel 212. In this embodiment, the power blade 22, the auxiliary power blade and the corresponding control cavity and the cavity wall of the auxiliary control cavity are sealed by the sealing member. In other embodiments, the rotation shaft can be driven by the power blade alone, and the auxiliary power blade is not provided at this time, but the force on the rotation shaft is uneven, which affects the life of the rotation shaft; of course, at least two auxiliary power blades can also be provided, and at least two corresponding auxiliary power cavities should also be provided.

[0025] The actuating housing is provided with an actuating housing sealing portion 121 which cooperates with the rotating shaft 21 to separate the control chamber 3 and the auxiliary control chamber 4. The actuating housing sealing portion 121 is provided with a sealing groove, and a sealing member 122 is provided in the sealing groove, which may specifically be a sealing block or other commonly used sealing member. In order to ensure the stability of the rotating shaft 21 during rotation, in this embodiment, the actuating housing sealing portion 121 has a positioning arc surface 1211 adapted to the outer peripheral surface of the rotating shaft 21. The positioning arc surface is used to position the rotor 2 so that it will not deflect during rotation. In this embodiment, the rotating shaft 21 and the power blades 22 and the auxiliary power blades 23 are an integrated structure. In other embodiments, the power blades 22 or the auxiliary power blades 23 may be a split structure with the rotating shaft 21, for example, fixed together by welding, riveting, etc.

[0026] When the hydraulic butterfly valve is used, power is provided by a power device connected to the first control interface 14 and the second control interface 15, and fluids of different pressures are provided to the first control interface 14 and the second control interface 15 respectively. Under the pressure difference between the control chamber 3 and the power blade 22 and the pressure difference between the auxiliary control chamber 4 and the auxiliary power blade 23, the rotor 2 overcomes the maximum resistance torque to rotate, and the maximum resistance torque of the rotor 2 is the maximum power torque required for the rotation of the rotor 2. In this embodiment, the first control part 31 connected to the first control interface 14 is a constant pressure control part, and the first control interface 14 is connected to a constant pressure valve for controlling the fluid pressure in the first control part 31, and the constant pressure valve constitutes a control valve. When forward rotation is required, a control fluid with a larger pressure is pumped into the second control interface 15, and when the rotor 2 needs to rotate in the opposite direction, a control fluid with a smaller pressure is pumped into the second control interface 15.

[0027] like Figure 5 and 6 As shown, in order to prevent the fluid in the control chamber 3 and the auxiliary control chamber 4 from being in a high temperature state for a long time and affecting the safety performance of the butterfly valve, a damping channel 123 is also provided on the rotor mounting part 12 to connect the first control part 31 with the second control part 32. A throttling nozzle 124 is arranged in the damping channel 123. The throttling nozzle in this embodiment is a throttling nozzle of the standard series of LEE type detachable and easy to install. The damping channel 123 ensures that the power device can normally control the rotation of the rotor 2 through the damping effect of the throttling nozzle 124. The throttling nozzle 124 in this embodiment constitutes a throttling component arranged in the damping channel 123. In other embodiments, the throttling component can also be other components such as a damping valve. In other embodiments, the damping effect on the fluid can also be achieved through a damping hole. The openings at both ends of the damping channel 123 in this embodiment are respectively connected to the first control interface 14 and the second control interface 15, and the damping channel 123 is connected to the external fluid pipeline through the first control interface 14 and the second control interface 15. Correspondingly, the engine control system should also include a fluid circulation control device that communicates with the first control part 31 and the second control part 32, and the fluid circulation control device allows the first control part 31 and the second control part 32 to circulate with the external fluid through the damping channel 123. The fluid circulation control device in this embodiment is implemented by a power device, such as Figure 6 As shown, Figure 6 The left dotted frame portion represents a power device, which includes a controller, an electro-hydraulic servo valve connected to the control chamber, and a constant pressure valve connected to the constant pressure chamber. The controller is connected to the angular displacement sensor signal to control the action of the hydraulically controlled butterfly valve. In other embodiments, the power device and the fluid circulation control device can be independently provided.

[0028] When the rotation of the rotor 2 does not need to be controlled, a certain pressure difference is generated between the fluid in the first control part 31 and the second control part 32 through the fluid circulation control device, and the dynamic torque of the control chamber 3 and the auxiliary control chamber 4 on the rotor 2 is less than the maximum dynamic torque required for the rotation of the rotor 2, so as to ensure that the rotor 2 does not rotate, and the fluid circulates through the damping channel, thereby allowing the fluid in the control chamber 3 and the auxiliary control chamber 4 to circulate, avoiding the fluid in the control chamber 3 and the auxiliary control chamber 4 always being in a high temperature state, achieving high temperature protection, and improving the safety performance of the hydraulically controlled butterfly valve. Of course, when the rotor rotates, due to the certain pressure difference between the fluid in the first control part 31 and the second control part 32, the fluid circulates through the damping channel to achieve high temperature protection.

[0029] When the rotor 2 is required to drive the valve plate to rotate in the forward direction, under the control of the power device, high-pressure control fluid is filled into the second control part 32 of the hydraulically controlled butterfly valve, so that the pressure of the second control part 32 is greater than the pressure of the first control part 31, and when the power torque of the control chamber 3 and the auxiliary control chamber 4 on the rotor 2 is greater than the maximum power torque required for the rotation of the rotor 2, the rotor 2 drives the valve plate to rotate. At this time, the external control fluid enters the second control part 32 through the second control interface 15, and then enters the fourth control part 42 through the second connecting channel 212; the control fluid of the first control part 31 enters the third control part 41 through the first connecting channel 211, and the control fluid in the third control part 41 flows out of the hydraulically controlled butterfly valve through the first control interface 14. In this embodiment, the first control part 31 and the third control part 41 are both communicated with the first control interface 14, and a first control chamber connecting port connected to the first control interface 14 is provided on the chamber wall of the third control part 41. In other embodiments, the first control chamber connecting port may also be provided on the chamber wall of the first control part 31, and the position of the first control chamber connecting port may be provided as needed; in this embodiment, the second control chamber connecting port 16 connected to the second control interface 15 is provided on the chamber wall of the second control part 32. In other embodiments, the second control interface 15 may also be provided on the chamber wall of the fourth control part 42.

[0030] When the rotor 2 needs to rotate in the opposite direction, similar to the above-mentioned forward rotation of the rotor, the pressure in the second control part is reduced by the power device, and part of the control fluid in the second control part is discharged. The pressure in the first control part is greater than the pressure in the second control part, and the dynamic torque of the control chamber 3 and the auxiliary control chamber 4 on the rotor 2 is greater than the maximum dynamic torque required for the rotation of the rotor 2.

[0031] A specific embodiment of the engine control system of the present invention includes a fluid pipeline, a power device and a hydraulically controlled butterfly valve arranged on the fluid pipeline. The hydraulically controlled butterfly valve and the power device have the same structure as described in the specific embodiment of the hydraulically controlled butterfly valve, and will not be repeated here.

Claims

1. A hydraulically controlled butterfly valve, comprising a valve body and a valve plate arranged in the valve body, an actuating assembly being arranged on the valve body, the actuating assembly comprising an actuating housing and a rotor rotatably assembled in the actuating housing for driving the valve plate to rotate, the actuating housing comprising an angular displacement sensor for detecting the state of the hydraulically controlled butterfly valve, the rotor and the actuating housing forming a control cavity, the rotor comprising a rotating shaft and a power leaf arranged on the radial side of the rotating shaft, the power leaf extending into the control cavity and separating the control cavity, the control cavity comprising a first control part and a second control part separated by the power leaf, the actuating housing further comprising a first control interface and a second control interface respectively communicating with the first control part and the second control part, characterized in that: The actuating housing is also provided with a damping channel that connects the first control part with the second control part. The openings at both ends of the damping channel are respectively connected to the first control interface and the second control interface. The damping channel is connected to an external fluid pipeline through the first control interface and the second control interface.

2. The hydraulically controlled butterfly valve according to claim 1, characterized in that: A throttling component is arranged in the damping channel.

3. The hydraulically controlled butterfly valve according to claim 1 or 2, characterized in that: The actuating housing is also provided with an auxiliary control chamber, and the actuating housing is provided with an actuating housing sealing portion which cooperates with the rotating seal of the rotating shaft to separate the control chamber and the auxiliary control chamber. The rotating shaft is also provided with an auxiliary power leaf, which extends into the auxiliary control chamber to separate the auxiliary control chamber. The auxiliary control chamber includes a third control part and a fourth control part separated by the auxiliary power leaf, and the first, second, third and fourth control parts are arranged in sequence along the circumferential direction of the rotating shaft, wherein a first connecting channel connecting the third control part with the first control part and a second connecting channel connecting the second control part with the fourth control part are provided on the rotating shaft, and the first connecting channel is isolated from the second connecting channel, and the actuating housing sealing portion has a positioning arc surface adapted to the outer circumferential surface of the rotating shaft.

4. The hydraulically controlled butterfly valve according to claim 1 or 2, characterized in that: The first control part is a constant pressure control part.

5. An engine control system, comprising a fluid pipeline and a hydraulically controlled butterfly valve arranged on the fluid pipeline, the hydraulically controlled butterfly valve comprising a valve body and a valve plate arranged in the valve body, an actuating assembly being arranged on the valve body, the actuating assembly comprising an actuating housing and a rotor rotatably assembled in the actuating housing for driving the valve plate to rotate, the actuating housing comprising an angular displacement sensor for detecting the state of the hydraulically controlled butterfly valve, the rotor and the actuating housing forming a control cavity, the rotor comprising a rotating shaft and a power blade arranged on the radial side of the rotating shaft, the power blade extending into the control cavity and separating the control cavity, the control cavity comprising a first control portion and a second control portion separated by the power blade, the actuating housing further comprising a first control interface and a second control interface respectively communicating with the first control portion and the second control portion, characterized in that: The actuating housing is also provided with a damping channel connecting the first control part with the second control part. The engine control system also includes a fluid circulation control device connected with the first control part and the second control part so that the first control part and the second control part circulate with the external fluid through the damping channel.

6. The engine control system according to claim 5, characterized in that: A throttling component is arranged in the damping channel.

7. The engine control system according to claim 5 or 6, characterized in that: The damping channel is communicated with the fluid circulation control device through the first control interface and the second control interface.

8. The engine control system according to claim 5 or 6, characterized in that: The actuating housing is also provided with an auxiliary control chamber, and the actuating housing is provided with an actuating housing sealing portion which cooperates with the rotating seal of the rotating shaft to separate the control chamber and the auxiliary control chamber. The rotating shaft is also provided with an auxiliary power leaf, which extends into the auxiliary control chamber to separate the auxiliary control chamber. The auxiliary control chamber includes a third control part and a fourth control part separated by the auxiliary power leaf, and the first, second, third and fourth control parts are arranged in sequence along the circumferential direction of the rotating shaft, wherein a first connecting channel connecting the third control part with the first control part and a second connecting channel connecting the second control part with the fourth control part are provided on the rotating shaft, and the first connecting channel is isolated from the second connecting channel, and the actuating housing sealing portion has a positioning arc surface adapted to the outer circumferential surface of the rotating shaft.

9. The engine control system according to claim 5 or 6, characterized in that: The first control part is a constant pressure control part, and the first control interface is connected to a control valve for controlling the pressure in the first control part.

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