Active noise elimination pressure release valve

Abstract

The invention relates to the technical field of vibration and noise reduction of a pipeline system, and provides an active noise elimination pressure release valve which comprises a valve body, a liquid inlet cavity, a pressure release cavity and a noise reduction cavity. The bypass pipe is communicated with the liquid inlet cavity; the pressure relief assembly comprises an adjusting part, a pressure relief elastic part and a pressure relief valve element, the pressure relief valve element and the pressure relief elastic part are arranged in the pressure relief cavity, the adjusting part is movably arranged on the valve body, the piezoelectric actuator is arranged on the adjusting part, and the pressure relief elastic part is arranged between the piezoelectric actuator and the pressure relief valve element in a pressed mode; the piezoelectric actuator is configured to drive the pressure relief elastic piece so as to eliminate transient noise caused by pulsating pressure when the pressure relief valve element moves. According to the active noise elimination pressure release valve, the piezoelectric actuator is arranged, an active noise elimination technology is introduced into pulsating noise control of the active noise elimination pressure release valve, and the acting force applied to the pressure release valve element can be adjusted through the pressure release elastic piece so that transient noise caused by pulsating pressure when the pressure release valve element moves can be eliminated.

Description

Technical Field

[0001] The invention relates to the technical field of vibration reduction and noise reduction of pipeline systems, and in particular to an active silencer and pressure relief valve. Background Art

[0002] In the existing industrial fluid system, pressure relief valves are important safety and control components and are widely used in various equipment and pipelines to prevent the system from overpressure and ensure the safe and stable operation of the equipment. However, at the moment the pressure relief valve is opened, due to the sudden change in fluid pressure, strong pulsating pressure is often generated, which in turn causes transient noise. This noise not only affects the working environment, but may also cause damage to equipment and personnel.

[0003] At present, the research on the elimination of transient noise of pressure relief valves mainly focuses on the optimization design of valve structure and optimization of pipeline layout. These measures can reduce the noise level to a certain extent, but the effect is limited, and often require a lot of calculations and experimental verifications in the early stage of design, which is costly and difficult to directly eliminate the transient noise in the existing valve mechanism. Summary of the invention

[0004] The invention provides an active muffler pressure relief valve, which is used to solve the problem that the existing active muffler pressure relief valve generates strong pulsating pressure and induces transient noise.

[0005] The present invention provides an active muffler pressure relief valve, comprising: The valve body is formed with a liquid inlet cavity and a pressure relief cavity which are interconnected; A bypass pipe, connected to the liquid inlet chamber; A piezoelectric actuator and a pressure relief assembly, wherein the pressure relief assembly comprises an adjusting member, a pressure relief elastic member and a pressure relief valve core, wherein the pressure relief valve core and the pressure relief elastic member are arranged in the pressure relief chamber, the adjusting member is movably arranged on the valve body, the piezoelectric actuator is arranged on the adjusting member, and the pressure relief elastic member is pressed between the piezoelectric actuator and the pressure relief valve core, so that the pre-tightening force of the pressure relief elastic member can be adjusted by the adjusting member, so that the pressure relief valve core is pressed by the pressure relief elastic member to seal the liquid inlet chamber and the pressure relief chamber; the piezoelectric actuator is configured to drive the pressure relief elastic member to eliminate transient noise caused by pulsating pressure when the pressure relief valve core moves.

[0006] According to an active noise-reducing and pressure-relieving valve provided by the present invention, the active noise-reducing and pressure-relieving valve further includes: a first sealing cover and a second sealing cover; The valve body is provided with a first installation opening and a second installation opening, the first sealing cover is arranged at the first installation opening, and the second sealing cover is arranged at the second installation opening; The first sealing cover and one side of the pressure relief valve core separate the valve body to form the pressure relief chamber, and the second sealing cover and the other side of the pressure relief valve core separate the valve body to form the liquid inlet chamber; The adjusting member is movably arranged on the first sealing cover.

[0007] According to an active muffler pressure relief valve provided by the present invention, the regulating member comprises: An adjusting rod, the first end of which is located outside the valve body, the second end of which passes through the first sealing cover and is rotatably arranged on the first sealing cover, the piezoelectric actuator is connected to the second end of the adjusting rod, and the pressure relief elastic member abuts between the second end of the adjusting rod and the pressure relief valve core; An adjusting end cap is connected to the first end of the adjusting rod.

[0008] According to an active muffler pressure relief valve provided by the present invention, the pressure relief valve core comprises: A valve seat, arranged between the liquid inlet chamber and the pressure relief chamber; a valve flap slidably disposed on the valve seat; The valve stem is inserted into the valve disc, with a first end extending to the pressure relief chamber and a second end extending to the liquid inlet chamber. The pressure relief elastic member is sleeved on the first end of the valve stem, and the pressure relief elastic member is pressed between the valve disc and the piezoelectric actuator.

[0009] According to an active silencer pressure relief valve provided by the present invention, the active silencer pressure relief valve further comprises: A damping rod connected to the second end of the adjusting rod; A guide sleeve has a first end that is movably sleeved outside the damping rod and a second end that is sleeved on the first end of the valve stem. The piezoelectric actuator is arranged on the guide sleeve.

[0010] According to an active muffler pressure relief valve provided by the present invention, the piezoelectric actuator comprises: a first support plate, two support elastic members, a second support plate, a fastener and a plurality of piezoelectric bodies; The first support plate and the second support plate are spaced apart, the first support plate is connected to the guide sleeve, the plurality of piezoelectric bodies are stacked in sequence, the fastener passes through one of the support elastic members, the plurality of piezoelectric bodies and the other support elastic member in sequence, the two support elastic members are both supported between the first support plate and the second support plate, the two support elastic members are respectively abutted against two ends of the plurality of piezoelectric bodies, and the pressure relief elastic member is pressed between the second support plate and the valve flap.

[0011] According to an active silencer pressure relief valve provided by the present invention, the two supporting elastic members are divided into a first supporting elastic member and a second supporting elastic member, the first supporting elastic member is provided with a first notch groove near the fastener, the first supporting plate and the supporting plate, and the second supporting elastic member is provided with a second notch groove near the fastener, the first supporting plate and the second supporting plate.

[0012] According to an active muffler pressure relief valve provided by the present invention, the piezoelectric actuator further comprises: a first stopper, a second stopper, and two pre-tightening members; The first stopper and the second stopper are connected to the fastener at intervals, and the two pre-tightening members are respectively arranged on the outside of the first stopper and the second stopper, so that the first stopper and the second stopper are clamped on both sides of the plurality of piezoelectric bodies; The middle portion of one of the supporting elastic members is sandwiched between the first stopper and one of the pre-tightening members, and the middle portion of the other supporting elastic member is sandwiched between the second stopper and the other of the pre-tightening members.

[0013] According to an active silencer pressure relief valve provided by the present invention, the active silencer pressure relief valve further comprises: A pressure sensor is arranged in the liquid inlet chamber and / or the pressure relief chamber and is electrically connected to the piezoelectric actuator.

[0014] According to an active silencer pressure relief valve provided by the present invention, the active silencer pressure relief valve further comprises: A control unit is electrically connected to the pressure sensor and the piezoelectric actuator, and is used to receive pressure data collected by the pressure sensor, and control the start and stop of the piezoelectric actuator according to a preset pressure threshold and the pressure data, so as to adjust the driving force of the pressure relief elastic member on the pressure relief valve core.

[0015] The active muffler pressure relief valve provided by the present invention aims at the current situation that the traditional passive pulsation noise suppression effect is poor. By arranging a piezoelectric actuator, an active muffler technology with integrated function and structure is introduced into the pulsation noise control of the active muffler pressure relief valve. The force applied to the pressure relief valve core can be adjusted through the pressure relief elastic member to eliminate the transient noise caused by the pulsation pressure when the pressure relief valve core moves. In addition, the adjustment member in the active muffler pressure relief valve allows the user to adjust the preload force of the pressure relief elastic member as needed, and flexibly adjust the working pressure range of the active muffler pressure relief valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 It is a structural schematic diagram of the active silencer pressure relief valve provided by the present invention.

[0018] Figure 2 yes Figure 1 Schematic diagram of the AA section.

[0019] Figure 3 This is one of the structural schematic diagrams of the piezoelectric actuator provided by the present invention.

[0020] Figure 4 This is the second structural schematic diagram of the piezoelectric actuator provided by the present invention.

[0021] Figure 5 This is the third structural schematic diagram of the piezoelectric actuator provided by the present invention.

[0022] Figure 6 yes Figure 4 Enlarged schematic diagram of the C position in the middle.

[0023] Figure 7 yes Figure 4 A magnified schematic diagram of position B in the middle.

[0024] Reference numerals: 100, valve body; 110, pressure relief chamber; 120, liquid inlet chamber; 200, bypass pipe; 300, pressure relief assembly; 310, adjusting rod; 320, adjusting end cover; 330, pressure relief elastic member; 340, valve seat; 350, valve disc; 360, valve stem; 400, piezoelectric actuator; 410, first support plate; 420, supporting elastic member; 430, second support plate; 440, fastener; 450, piezoelectric body; 460, first stopper; 470, second stopper; 480, preload member; 500, guide sleeve; 600, first sealing cover; 700, second sealing cover; 800, damping rod. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] The embodiment of the present invention provides an active muffler pressure relief valve, such as Figure 1 to Figure 2 As shown, the active muffler pressure relief valve includes: a valve body 100 , a bypass pipe 200 , a piezoelectric actuator 400 and a pressure relief assembly 300 . The valve body 100 is formed with a liquid inlet chamber 120 and a pressure relief chamber 110 which are interconnected; the bypass pipe 200 is connected to the liquid inlet chamber 120; the pressure relief assembly 300 includes an adjusting member, a pressure relief elastic member 330 and a pressure relief valve core, the pressure relief valve core and the pressure relief elastic member 330 are arranged in the pressure relief chamber 110, the adjusting member is movably arranged on the valve body 100, the piezoelectric actuator 400 is arranged on the adjusting member, the pressure relief elastic member 330 is pressed between the piezoelectric actuator 400 and the pressure relief valve core, so that the pre-tightening force of the pressure relief elastic member 330 is adjusted by the adjusting member, so that the pressure relief valve core is pressed by the pressure relief elastic member 330 to block the liquid inlet chamber 120 and the pressure relief chamber 110; the piezoelectric actuator 400 is configured to drive the pressure relief elastic member 330 to eliminate transient noise caused by pulsating pressure when the pressure relief valve core moves.

[0027] In this embodiment, the valve body 100 is the main structure of the active muffler pressure relief valve, and two interconnected chambers are provided inside, namely, the liquid inlet chamber 120 and the pressure relief chamber 110. The liquid inlet chamber 120 is responsible for receiving the fluid, while the pressure relief chamber 110 is used to adjust and release the pressure. The bypass pipe 200 is connected to the liquid inlet chamber 120 and is used to guide the fluid to other paths. The piezoelectric actuator 400 is an active control element that works by using the piezoelectric effect. When a voltage is applied, the piezoelectric actuator 400 will deform, and this deformation can be converted into mechanical force to accurately control the movement of the pressure relief elastic member 330. The adjustment member is arranged on the valve body 100, allowing the user to adjust it manually or automatically. Its main function is to adjust the preload force of the pressure relief elastic member 330. The pressure relief elastic member 330 is a spring or elastic material, located between the piezoelectric actuator 400 and the pressure relief valve core. Its preload force determines the degree of blocking of the channel between the liquid inlet chamber 120 and the pressure relief chamber 110 by the pressure relief valve core. When the pre-tightening force of the pressure relief elastic member 330 is sufficient, the pressure relief valve core will tightly block the passage between the liquid inlet chamber 120 and the pressure relief chamber 110 .

[0028] During operation, the preload force of the pressure relief elastic member 330 can be adjusted through the adjusting member, and the degree of blocking of the channel by the pressure relief valve core can be controlled, thereby adjusting the working pressure range of the active silencer pressure relief valve. During the movement of the pressure relief valve core, transient noise caused by fluid pulsation is a common problem. The present invention introduces a piezoelectric actuator 400 and utilizes its active control capability to accurately adjust the force applied by the pressure relief elastic member 330 to the pressure relief valve core, thereby effectively eliminating this transient noise. This technology combines function (pressure regulation) and structure (noise suppression) into one, and is an active silencer technology that can offset the pressure pulsation noise generated during the operation of the active silencer pressure relief valve.

[0029] The active muffler pressure relief valve provided by the embodiment of the present invention, in view of the current situation that the traditional passive pulsation noise suppression effect is poor, introduces the active muffler technology with integrated function and structure into the pulsation noise control of the active muffler pressure relief valve by arranging the piezoelectric actuator 400, and can adjust the force applied to the pressure relief valve core through the pressure relief elastic member 330 to eliminate the transient noise caused by the pulsation pressure when the pressure relief valve core moves. In addition, the adjustment member in the active muffler pressure relief valve allows the user to adjust the preload force of the pressure relief elastic member 330 as needed, and flexibly adjust the working pressure range of the active muffler pressure relief valve.

[0030] In some embodiments, Figure 1 and Figure 2 As shown, the active silencer pressure relief valve also includes: a first sealing cover 600 and a second sealing cover 700; a first mounting port and a second mounting port are provided on the valve body 100, the first sealing cover 600 is arranged at the first mounting port, and the second sealing cover 700 is arranged at the second mounting port; the first sealing cover 600 and one side of the pressure relief valve core separate the valve body 100 to form a pressure relief chamber 110, and the second sealing cover 700 and the other side of the pressure relief valve core separate the valve body 100 to form a liquid inlet chamber 120; the adjusting member is movably arranged on the first sealing cover 600.

[0031] Specifically, the first sealing cover 600 is installed on the first mounting port of the valve body 100. Its main function is to separate the interior of the valve body 100 together with one side of the pressure relief valve core to form a pressure relief chamber 110. This chamber is used to adjust and release fluid pressure. The second sealing cover 700 is similar to the first sealing cover 600 and is installed on the second mounting port of the valve body 100. It and the other side of the pressure relief valve core separate the interior of the valve body 100 to form a liquid inlet chamber 120. This chamber is responsible for receiving fluid from an external system. The adjusting member is movably arranged on the first sealing cover 600. The user can adjust the preload force of the pressure relief elastic member 330 by operating the adjusting member, thereby controlling the degree of blocking of the channel between the liquid inlet chamber 120 and the pressure relief chamber 110 by the pressure relief valve core.

[0032] In some embodiments, Figure 1 and Figure 2 As shown, the regulating member includes: a regulating rod 310 and a regulating end cover 320. The first end of the regulating rod 310 is located outside the valve body 100, and the second end passes through the first sealing cover 600 and is rotatably arranged on the first sealing cover 600. The piezoelectric actuator 400 is connected to the second end of the regulating rod 310, and the pressure relief elastic member 330 abuts between the second end of the regulating rod 310 and the pressure relief valve core; the regulating end cover 320 is connected to the first end of the regulating rod 310.

[0033] Specifically, the adjusting rod 310 passes through a portion of the valve body 100 (through the first sealing cover 600) and allows the user to operate outside the valve body 100. The first end of the adjusting rod 310 is located outside the valve body 100, which is convenient for the user to directly operate or connect other components; the second end passes through the first sealing cover 600 and is arranged inside the valve body 100, and has a direct interaction with the piezoelectric actuator 400 and the pressure relief elastic member 330. The adjusting end cap 320 is a component connected to the first end of the adjusting rod 310. It is used to provide an additional gripping point, protect the first end of the adjusting rod 310 from damage, or serve as a handle for controlling the adjusting rod 310. The second end of the adjusting rod 310 passes through the first sealing cover 600 and is rotatably arranged on it. The user can adjust the adjusting rod 310 by rotating the adjusting end cap 320 outside the valve body 100, thereby adjusting the preload of the pressure relief elastic member 330. The piezoelectric actuator 400 is directly connected to the second end of the adjusting rod 310.

[0034] When the piezoelectric actuator 400 is activated, it will deform, and this deformation is transmitted to the pressure relief elastic member 330 through the adjustment rod 310, thereby changing the degree of blocking of the passage between the liquid inlet chamber 120 and the pressure relief chamber 110 by the pressure relief valve core.

[0035] In some embodiments, Figure 1 and Figure 2 As shown, the pressure relief valve core includes: a valve seat 340, a valve flap 350 and a valve stem 360. The valve seat 340 is arranged between the liquid inlet chamber 120 and the pressure relief chamber 110; the valve flap 350 is slidably arranged on the valve seat 340; the valve stem 360 is inserted into the valve flap 350, the first end of which extends to the pressure relief chamber 110, and the second end of which extends to the liquid inlet chamber 120; the pressure relief elastic member 330 is sleeved on the first end of the valve stem 360, and the pressure relief elastic member 330 is pressed between the valve flap 350 and the piezoelectric actuator 400.

[0036] In this embodiment, the valve seat 340 is a fixed part of the pressure relief valve core, which is arranged between the liquid inlet chamber 120 and the pressure relief chamber 110, and plays a role in supporting and positioning the valve flap 350. The valve seat 340 usually has one or more sealing surfaces to ensure that the valve flap 350 can fit tightly when closed to prevent fluid leakage.

[0037] The valve flap 350 is the movable part of the pressure relief valve core, and it is slidably disposed on the valve seat 340. When the fluid pressure reaches the set value, the valve flap 350 will be lifted from the valve seat 340 under the action of the fluid pressure, allowing the fluid to flow from the liquid inlet chamber 120 into the pressure relief chamber 110, thereby releasing the pressure. When the fluid pressure decreases, the valve flap 350 will reattach to the valve seat 340 under the action of the pressure relief elastic member 330, closing the channel.

[0038] The valve stem 360 is inserted into the valve disc 350, with a first end extending to the pressure relief chamber 110 (which may be connected to or close to the adjustment rod 310), and a second end extending to the liquid inlet chamber 120 (which is fixedly connected to a part of the valve disc 350). The valve stem 360 and the guide sleeve 500 form a kinematic pair, and the valve stem 360 cooperates with the guide sleeve 500 to constrain the radial freedom of the valve disc 350.

[0039] The pressure relief elastic member 330 is sleeved on the first end of the valve stem 360 and is pressed between the valve flap 350 and the piezoelectric actuator 400. When the piezoelectric actuator 400 is activated, it generates a driving force, which is transmitted to the valve flap 350 through the pressure relief elastic member 330 to eliminate transient noise caused by pulsating pressure when the valve flap 350 moves.

[0040] In some embodiments, Figure 1 and Figure 2 As shown, the active muffler pressure relief valve further includes: a damping rod and a guide sleeve 500. The damping rod is connected to the second end of the adjustment rod 310; the first end of the guide sleeve 500 is movably sleeved outside the damping rod, and the second end is sleeved on the first end of the valve stem 360, and the piezoelectric actuator 400 is arranged on the guide sleeve 500.

[0041] In this embodiment, the damping rod mainly provides damping when the valve flap 350 oscillates, reduces the overshoot of the valve flap 350, and is a passive vibration reduction and noise reduction measure. The guide sleeve 500 is a tubular component sleeved on the damping rod and the first end of the valve stem 360. Its first end is movably sleeved outside the damping rod, and the second end is sleeved on the first end of the valve stem 360. The main function of the guide sleeve 500 is to guide and support the movement of the damping rod and the valve stem 360 to ensure that they can move along a predetermined path. In addition, the guide sleeve 500 may also play a role in reducing friction and wear, and improve the durability of the active muffler pressure relief valve. The damping rod is connected to the second end of the adjusting rod 310 and forms an integral structure with the adjusting rod 310. In this way, when the valve flap 350 moves relative to the valve seat 340, the damping rod moves in the guide sleeve 500, and the overshoot of the valve flap 350 can be reduced through the resistance of the damping rod when it moves in the guide sleeve 500. The piezoelectric actuator 400 is disposed on the guide sleeve 500 instead of being directly connected to the adjusting rod 310 or the valve stem 360, so that the piezoelectric actuator 400 can indirectly control the movement of the valve stem 360 and the valve flap 350 through the guide sleeve 500, adjust the opening of the active silencer pressure relief valve, and offset the pressure pulsation noise generated during the operation of the active silencer pressure relief valve.

[0042] In some embodiments, Figures 1 to 7As shown, the piezoelectric actuator 400 includes: a first support plate 410, two support elastic members 420, a second support plate 430, a fastener 440 and a plurality of piezoelectric bodies 450; the first support plate 410 and the second support plate 430 are spaced apart, the first support plate 410 is connected to the guide sleeve 500, the fastener 440 passes through one of the support elastic members 420, a plurality of piezoelectric bodies 450 and another support elastic member 420 in sequence, the two support elastic members 420 are both supported between the first support plate 410 and the second support plate 430, the support elastic member 420 is respectively abutted against both ends of the plurality of piezoelectric bodies 450, and the pressure relief elastic member 330 is pressed between the second support plate 430 and the valve flap 350.

[0043] Specifically, the first support plate 410 is a fixed base of the piezoelectric actuator 400, which is connected to the guide sleeve 500 to provide stable support for the piezoelectric body 450. The first support plate 410 usually has high rigidity and strength to ensure that the piezoelectric body 450 will not be deformed or displaced when working. The support elastic member 420 is an elastic element connected between the first support plate 410, the fastener 440 and the second support plate 430. Its main function is to transmit the force provided by the piezoelectric body 450. The support elastic member 420 is usually made of materials such as springs and elastic gaskets.

[0044] The second support plate 430 is another fixed base of the piezoelectric actuator 400, which is spaced apart from the first support plate 410 and connected together through the fastener 440 and the supporting elastic member 420. The second support plate 430 is used to provide additional support for the piezoelectric body 450 and transmit the driving force generated by the piezoelectric body 450 to the valve flap 350. The fastener 440 passes through the central axis of the plurality of piezoelectric bodies 450, and it tightly connects the piezoelectric bodies 450 together to form an integral structure.

[0045] The piezoelectric bodies 450 are sequentially stacked between the first support plate 410 and the second support plate 430 along the extending direction of the fastener 440. The stacking direction of the piezoelectric bodies 450 is perpendicular to the arrangement direction of the first support plate 410 and the second support plate 430.

[0046] For example, when the piezoelectric body 450 is affected by an external electric field, they will undergo a slight deformation. The piezoelectric body 450 composed of multiple stacked piezoelectric sheets generates a lateral driving force. The lateral driving force controls the supporting elastic member 420, so that the first supporting plate 410 and the second supporting plate 430 move relative to each other. The supporting elastic member 420 converts the lateral driving force (displacement) into a longitudinal displacement and amplifies the driving force (displacement). This driving force is transmitted to the valve flap 350, adjusts the opening of the active silencer pressure relief valve, and offsets the pressure pulsation noise generated during the operation of the active silencer pressure relief valve.

[0047] like Figures 3 to 7As shown, the supporting elastic member 420 is divided into a first supporting elastic member and a second supporting elastic member. The first supporting elastic member is provided with a first notch groove near the fastener 440, the first supporting plate 410 and the supporting plate, and the second supporting elastic member is provided with a second notch groove near the fastener 440, the first supporting plate 410 and the second supporting plate 430.

[0048] In this embodiment, the upper and lower ends of the first supporting elastic member are supported on the first supporting plate 410 and the second supporting plate 430, and the fastener 440 passes through the middle of the first supporting elastic member. The upper and lower ends of the second supporting elastic member are supported on the first supporting plate 410 and the second supporting plate 430, and the fastener 440 passes through the middle of the second supporting elastic member. The first supporting elastic member and the second supporting elastic member are respectively abutted at both ends of the plurality of piezoelectric bodies 450.

[0049] When the multiple piezoelectric bodies 450 move to both sides under voltage control, the first supporting elastic member and the second supporting elastic member can convert the lateral displacement into the longitudinal displacement and amplify the displacement, and can drive the first supporting plate 410 and the second supporting plate 430 to move up and down, so as to apply a force to the valve flap 350 to adjust the opening of the valve, thereby offsetting the pressure pulsation noise generated during the operation of the active silencer pressure relief valve.

[0050] At the same time, a first notch groove is provided at a position of the first supporting elastic member near the fastener 440, the first supporting plate 410 and the supporting plate. The main function of the first notch groove is to reduce the stress concentration of the first supporting elastic member when it is subjected to pressure, and prevent it from failing due to excessive deformation. At the same time, the first notch groove can also improve the flexibility of the first supporting elastic member, so that it can better adapt to the deformation generated when the piezoelectric body 450 is working. A second notch groove is provided at a position of the second supporting elastic member near the fastener 440, the first supporting plate 410, and the second supporting plate 430. Similar to the first notch groove, the second notch groove also plays a role in reducing stress concentration and improving flexibility. By providing the first notch groove and the second notch groove on the supporting elastic member 420, the rigidity of the connecting part can be reduced, thereby better amplifying the longitudinal displacement.

[0051] In some embodiments, Figures 3 to 7 As shown, the piezoelectric actuator 400 also includes: a first stopper 460, a second stopper 470, and two pre-tightening members 480; the first stopper 460 and the second stopper 470 are connected to the fastener 440 at intervals, and the two pre-tightening members 480 are respectively arranged on the outer sides of the first stopper 460 and the second stopper 470, so that the first stopper 460 and the second stopper 470 are clamped on both sides of the plurality of piezoelectric bodies 450; the middle portion of one supporting elastic member 420 is clamped between the first stopper and a pre-tightening member 480, and the middle portion of the other supporting elastic member 420 is clamped between the second stopper 470 and the other pre-tightening member 480.

[0052] In this embodiment, the first stopper 460 is a block-shaped component connected to the fastener 440, and is located on one side of the plurality of piezoelectric bodies 450. The main function of the first stopper 460 is to transfer the lateral movement of the piezoelectric bodies 450 when subjected to pressure, while ensuring that they can remain in a stable stacking structure. The second stopper 470 is similar to the first stopper 460 and is also a block-shaped component connected to the fastener 440, but it is located on the other side of the plurality of piezoelectric bodies 450. The second stopper 470 works together with the first stopper 460 to sandwich the piezoelectric bodies 450 between them for transmitting lateral forces.

[0053] The pre-tightening member 480 is a component disposed outside the first stopper 460 and the second stopper 470, and is usually fixed to the fastener 440 by threaded connection or other fastening methods. The main function of the pre-tightening member 480 is to provide additional pre-tightening force to ensure that the first stopper 460 and the second stopper 470 can be tightly clamped on both sides of the piezoelectric body 450, thereby further improving the stability and reliability of the piezoelectric actuator 400. At the same time, the two supporting elastic members 420 are supported between the first supporting plate 410 and the second supporting plate 430, the middle part of one supporting elastic member 420 is clamped between the first stopper 460 and one pre-tightening member 480, and the middle part of the other supporting elastic member 420 is clamped between the second stopper 470 and the other pre-tightening member 480. This configuration enables the supporting elastic member 420 to effectively convert the lateral displacement into the longitudinal displacement and amplify the displacement.

[0054] In some embodiments, the active muffler pressure relief valve further includes: a pressure sensor, which is disposed in the liquid inlet chamber 120 and / or the pressure relief chamber 110 and is electrically connected to the piezoelectric actuator 400 .

[0055] In this embodiment, the pressure sensor is arranged in the liquid inlet chamber 120 and / or the pressure relief chamber 110 to monitor the fluid pressure in these areas in real time. By arranging the pressure sensor, it can be ensured that the active muffler pressure relief valve can accurately sense the change of fluid pressure and respond in time.

[0056] In addition, the active muffler pressure relief valve further includes: a control unit. The control unit is electrically connected to the pressure sensor and the piezoelectric actuator 400, and is used to receive pressure data collected by the pressure sensor, and control the start and stop of the piezoelectric actuator 400 according to a preset pressure threshold and pressure data, so as to adjust the driving force of the pressure relief elastic member 330 on the pressure relief valve core.

[0057] Specifically, the pressure sensor can convert the collected pressure data into an electrical signal and transmit it to the control unit. By setting up a pressure sensor, it can be ensured that the active muffler pressure relief valve can accurately sense the changes in fluid pressure and respond in time. The control unit is electrically connected to the pressure sensor and the piezoelectric actuator 400. The main function of the control unit is to receive the pressure data collected by the pressure sensor and compare these data according to a preset pressure threshold. When the fluid pressure exceeds or falls below the preset pressure threshold, the control unit will issue an instruction to start or shut down the piezoelectric actuator 400, thereby adjusting the driving force of the pressure relief elastic member 330 on the pressure relief valve core. The output signal is calculated by the control algorithm running on the control unit, and the piezoelectric actuator 400 is driven to promote the valve disc to vibrate, which can eliminate the vibration noise generated by the pulsating pressure of the pipeline.

[0058] After the introduction of pressure sensors and control units, the active silencer pressure relief valve realizes real-time monitoring and precise control of fluid pressure. This intelligent design not only improves the reliability and stability of the equipment, but also enables the active silencer pressure relief valve to be flexibly adjusted according to the needs of different application scenarios.

[0059] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An active silencer pressure relief valve, characterized in that: include: The valve body is formed with a liquid inlet cavity and a pressure relief cavity which are interconnected; A bypass pipe, connected to the liquid inlet chamber; A piezoelectric actuator and a pressure relief assembly, wherein the pressure relief assembly comprises an adjusting member, a pressure relief elastic member and a pressure relief valve core, wherein the pressure relief valve core and the pressure relief elastic member are arranged in the pressure relief chamber, the adjusting member is movably arranged on the valve body, the piezoelectric actuator is arranged on the adjusting member, and the pressure relief elastic member is pressed between the piezoelectric actuator and the pressure relief valve core, so that the pre-tightening force of the pressure relief elastic member is adjusted by the adjusting member, so that the pressure relief valve core is pressed by the pressure relief elastic member to block the liquid inlet chamber and the pressure relief chamber; The piezoelectric actuator is configured to drive the pressure relief elastic member to eliminate transient noise caused by pulsating pressure when the pressure relief valve core moves.

2. The active silencer pressure relief valve according to claim 1, characterized in that: The active muffler pressure relief valve further includes: a first sealing cover and a second sealing cover; The valve body is provided with a first installation opening and a second installation opening, the first sealing cover is arranged at the first installation opening, and the second sealing cover is arranged at the second installation opening; The first sealing cover and one side of the pressure relief valve core separate the valve body to form the pressure relief chamber, and the second sealing cover and the other side of the pressure relief valve core separate the valve body to form the liquid inlet chamber; The adjusting member is movably arranged on the first sealing cover.

3. The active silencer pressure relief valve according to claim 2, characterized in that: The adjusting member comprises: An adjusting rod, the first end of which is located outside the valve body, the second end of which passes through the first sealing cover and is rotatably arranged on the first sealing cover, the piezoelectric actuator is connected to the second end of the adjusting rod, and the pressure relief elastic member abuts between the second end of the adjusting rod and the pressure relief valve core; An adjusting end cap is connected to the first end of the adjusting rod.

4. The active silencer pressure relief valve according to claim 3, characterized in that: The pressure relief valve core comprises: A valve seat, arranged between the liquid inlet chamber and the pressure relief chamber; a valve flap slidably disposed on the valve seat; The valve stem is inserted into the valve disc, with a first end extending to the pressure relief chamber and a second end extending to the liquid inlet chamber. The pressure relief elastic member is sleeved on the first end of the valve stem, and the pressure relief elastic member is pressed between the valve disc and the piezoelectric actuator.

5. The active silencer pressure relief valve according to claim 4, characterized in that: The active silencer pressure relief valve also includes: A damping rod connected to the second end of the adjusting rod; A guide sleeve has a first end that is movably sleeved outside the damping rod and a second end that is sleeved on the first end of the valve stem. The piezoelectric actuator is arranged on the guide sleeve.

6. The active silencer pressure relief valve according to claim 5, characterized in that: The piezoelectric actuator comprises: a first support plate, two support elastic members, a second support plate, a fastener and a plurality of piezoelectric bodies; The first support plate and the second support plate are spaced apart, the first support plate is connected to the guide sleeve, the plurality of piezoelectric bodies are stacked in sequence, the fastener passes through one of the support elastic members, the plurality of piezoelectric bodies and the other support elastic member in sequence, the two support elastic members are both supported between the first support plate and the second support plate, the two support elastic members are respectively abutted against two ends of the plurality of piezoelectric bodies, and the pressure relief elastic member is pressed between the second support plate and the valve flap.

7. The active silencer pressure relief valve according to claim 6, characterized in that: The two supporting elastic members are divided into a first supporting elastic member and a second supporting elastic member. The first supporting elastic member is provided with a first notch groove near the fastener, the first supporting plate and the supporting plate, and the second supporting elastic member is provided with a second notch groove near the fastener, the first supporting plate and the second supporting plate.

8. The active silencer pressure relief valve according to claim 6, characterized in that: The piezoelectric actuator further comprises: a first stopper, a second stopper, and two pre-tightening members; The first stopper and the second stopper are connected to the fastener at intervals, and the two pre-tightening members are respectively arranged on the outside of the first stopper and the second stopper, so that the first stopper and the second stopper are clamped on both sides of the plurality of piezoelectric bodies; The middle portion of one of the supporting elastic members is sandwiched between the first stopper and one of the pre-tightening members, and the middle portion of the other supporting elastic member is sandwiched between the second stopper and the other of the pre-tightening members.

9. The active silencer pressure relief valve according to any one of claims 1 to 8, characterized in that: The active silencer pressure relief valve also includes: A pressure sensor is arranged in the liquid inlet chamber and / or the pressure relief chamber and is electrically connected to the piezoelectric actuator.

10. The active silencer pressure relief valve according to claim 9, characterized in that: The active silencer pressure relief valve also includes: A control unit is electrically connected to the pressure sensor and the piezoelectric actuator, and is used to receive pressure data collected by the pressure sensor, and control the start and stop of the piezoelectric actuator according to a preset pressure threshold and the pressure data, so as to adjust the driving force of the pressure relief elastic member on the pressure relief valve core.

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