Active silencing pressure relief valve

Abstract

The present application relates to pipeline system damping and noise reduction technical field, provide a kind of active noise cancellation pressure relief valve, comprising: valve body, with the liquid inlet cavity and pressure relief cavity being communicated are formed;Bypass pipe, with liquid inlet cavity is communicated;Piezoelectric actuator and pressure relief component, pressure relief component includes adjusting piece, pressure relief elastic piece and pressure relief valve core, pressure relief valve core and pressure relief elastic piece are set in pressure relief cavity, adjusting piece is movably arranged on valve body, piezoelectric actuator is arranged on adjusting piece, pressure relief elastic piece is pressed between piezoelectric actuator and pressure relief valve core;Piezoelectric actuator is configured to drive pressure relief elastic piece, to eliminate the transient noise caused by pulsating pressure when pressure relief valve core moves.The active noise cancellation pressure relief valve provided by the present application introduces active noise cancellation technology into the active noise cancellation pressure relief valve pulsating noise control by arranging piezoelectric actuator, can be adjusted by pressure relief elastic piece The force exerted on the pressure relief valve core can eliminate the transient noise caused by pulsating pressure when the pressure relief valve core moves.

Description

Technical Field

[0001] This invention relates to the field of vibration reduction and noise reduction technology for pipeline systems, and in particular to an active noise-reducing and pressure-relief valve. Background Technology

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

[0003] Currently, research on eliminating transient noise in pressure relief valves mainly focuses on optimizing valve structure design and pipeline layout. These measures can reduce noise levels to some extent, but their effectiveness is limited, and they often require extensive calculations and experimental verification in the early stages of design, resulting in high costs and making it difficult to directly eliminate transient noise in existing valve mechanisms. Summary of the Invention

[0004] This invention provides an active silencer pressure relief valve to solve the problem of strong pulsating pressure and transient noise generated by existing active silencer pressure relief valves.

[0005] This invention provides an active silencer and pressure relief valve, comprising:

[0006] The valve body has an inlet chamber and a pressure relief chamber that are interconnected.

[0007] A bypass pipe is connected to the liquid inlet chamber;

[0008] A piezoelectric actuator and a pressure relief assembly are provided. The pressure relief assembly includes an adjusting member, a pressure relief elastic element, and a pressure relief valve core. The pressure relief valve core and the pressure relief elastic element are disposed in the pressure relief chamber. The adjusting member is movably disposed on the valve body. The piezoelectric actuator is disposed on the adjusting member. The pressure relief elastic element is pressed between the piezoelectric actuator and the pressure relief valve core so that the preload of the pressure relief elastic element is adjusted by the adjusting member, thereby pressing the pressure relief valve core by the pressure relief elastic element to seal the inlet chamber and the pressure relief chamber. The piezoelectric actuator is configured to drive the pressure relief elastic element to eliminate transient noise caused by pulsating pressure when the pressure relief valve core moves.

[0009] According to the present invention, an active noise-reducing pressure relief valve further includes: a first sealing cover and a second sealing cover;

[0010] The valve body is provided with a first mounting port and a second mounting port, the first sealing cover is provided at the first mounting port, and the second sealing cover is provided at the second mounting port;

[0011] The first sealing cap and one side of the pressure relief valve core separate the valve body to form the pressure relief chamber, and the second sealing cap and the other side of the pressure relief valve core separate the valve body to form the liquid inlet chamber;

[0012] The adjusting element is movably disposed on the first sealing cover.

[0013] According to the present invention, an active silencer and pressure relief valve is provided, wherein the regulating element includes:

[0014] An adjusting rod has a first end located outside the valve body and a second end passing through the first sealing cover and rotatably mounted on the first sealing cover. The piezoelectric actuator is connected to the second end of the adjusting rod, and the pressure relief elastic element abuts between the second end of the adjusting rod and the pressure relief valve core.

[0015] An adjusting end cap is attached to the first end of the adjusting rod.

[0016] According to the present invention, an active silencer and pressure relief valve is provided, wherein the pressure relief valve core comprises:

[0017] A valve seat is disposed between the liquid inlet chamber and the pressure relief chamber;

[0018] The valve disc is slidably mounted on the valve seat;

[0019] A 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 element is sleeved on the first end of the valve stem and is pressed between the valve disc and the piezoelectric actuator.

[0020] According to the present invention, an active silencer pressure relief valve further includes:

[0021] A damping rod is connected to the second end of the adjusting rod;

[0022] The guide sleeve has a first end movably fitted outside the damping rod and a second end fitted around the first end of the valve stem. The piezoelectric actuator is mounted on the guide sleeve.

[0023] According to the present invention, an active silencer pressure relief valve is provided, wherein the piezoelectric actuator includes: a first support plate, two support elastic elements, a second support plate, fasteners, and a plurality of piezoelectric elements;

[0024] The first support plate and the second support plate are spaced apart. The first support plate is connected to the guide sleeve. A plurality of piezoelectric elements are stacked in sequence. The fastener passes through one of the supporting elastic elements, a plurality of piezoelectric elements and another supporting elastic element in sequence. Both supporting elastic elements are supported between the first support plate and the second support plate. The two supporting elastic elements abut against the two ends of the plurality of piezoelectric elements respectively. The pressure relief elastic element is pressed between the second support plate and the valve disc.

[0025] According to the present invention, an active silencer and pressure relief valve is provided, wherein the two supporting elastic elements are divided into a first supporting elastic element and a second supporting elastic element. The first supporting elastic element is provided with a first notch near the fastener, the first support plate and the support plate, and the second supporting elastic element is provided with a second notch near the fastener, the first support plate and the second support plate.

[0026] According to the present invention, an active silencer and pressure relief valve is provided, wherein the piezoelectric actuator further includes: a first stop block, a second stop block, and two preload elements;

[0027] The first stop and the second stop are connected to the fastener at intervals, and the two pre-tightening members are respectively disposed on the outside of the first stop and the second stop, so that the first stop and the second stop are clamped on both sides of the plurality of piezoelectric elements;

[0028] One of the supporting elastic members is sandwiched between the first stop and one of the pre-tightening members, and the other supporting elastic member is sandwiched between the second stop and another of the pre-tightening members.

[0029] According to the present invention, an active silencer pressure relief valve further includes:

[0030] A pressure sensor is disposed in the inlet chamber and / or the pressure relief chamber and is electrically connected to the piezoelectric actuator.

[0031] According to the present invention, an active silencer pressure relief valve further includes:

[0032] The control unit is electrically connected to the pressure sensor and the piezoelectric actuator. It 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 element on the pressure relief valve core.

[0033] The active noise-reducing pressure relief valve provided by this invention addresses the poor suppression effect of traditional passive pulsating noise. By incorporating piezoelectric actuators, it introduces an integrated active noise reduction technology into the pulsating noise control of the valve. This technology allows adjustment of the force applied to the pressure relief valve core via a pressure-reducing elastic element, thereby eliminating transient noise caused by pulsating pressure during the movement of the valve core. Furthermore, the adjustable element in this active noise-reducing pressure relief valve allows users to adjust the preload of the pressure-reducing elastic element as needed, flexibly adjusting the operating pressure range of the valve. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0035] Figure 1 This is a schematic diagram of the active silencer and pressure relief valve provided by the present invention.

[0036] Figure 2 yes Figure 1 A schematic diagram of section AA.

[0037] Figure 3 This is one of the structural schematic diagrams of the piezoelectric actuator provided by the present invention.

[0038] Figure 4 This is the second schematic diagram of the piezoelectric actuator provided by the present invention.

[0039] Figure 5 This is the third schematic diagram of the piezoelectric actuator provided by the present invention.

[0040] Figure 6 yes Figure 4 An enlarged diagram of position C in the middle.

[0041] Figure 7 yes Figure 4 An enlarged view of position B in the middle.

[0042] Figure label:

[0043] 100, Valve body; 110, Pressure relief chamber; 120, Liquid inlet chamber; 200, Bypass pipe; 300, Pressure relief assembly; 310, Adjusting rod; 320, Adjusting end cap; 330, Pressure relief elastic element; 340, Valve seat; 350, Valve disc; 360, Valve stem; 400, Piezoelectric actuator; 410, First support plate; 420, Support elastic element; 430, Second support plate; 440, Fastener; 450, Piezoelectric element; 460, First stop block; 470, Second stop block; 480, Preload element; 500, Guide sleeve; 600, First sealing cover; 700, Second sealing cover; 800, Damping rod. Detailed Implementation

[0044] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0045] This invention provides an active silencer and pressure relief valve, such as... Figures 1 to 2 As shown, the active silencer and pressure relief valve includes: valve body 100, bypass pipe 200, piezoelectric actuator 400 and pressure relief assembly 300. The valve body 100 has an inlet chamber 120 and a pressure relief chamber 110 that are interconnected. A bypass pipe 200 is connected to the 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 disposed in the pressure relief chamber 110. The adjusting member is movably disposed on the valve body 100. A piezoelectric actuator 400 is disposed 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 preload of the pressure relief elastic member 330 can be adjusted by the adjusting member so that the pressure relief valve core is pressed by the pressure relief elastic member 330 to seal the 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.

[0046] In this embodiment, the valve body 100 is the main structure of an active silencer pressure relief valve, with two interconnected chambers: an inlet chamber 120 and a pressure relief chamber 110. The inlet chamber 120 receives fluid, while the pressure relief chamber 110 regulates and releases pressure. A bypass pipe 200 is connected to the inlet chamber 120 to guide the fluid to other paths. The piezoelectric actuator 400 is an active control element that operates using the piezoelectric effect. When a voltage is applied, the piezoelectric actuator 400 deforms, which is converted into mechanical force to precisely control the movement of the pressure relief elastic element 330. An adjusting element is provided on the valve body 100, allowing the user to adjust it manually or automatically. Its main function is to adjust the preload of the pressure relief elastic element 330. The pressure relief elastic element 330 is a spring or elastic material located between the piezoelectric actuator 400 and the pressure relief valve core. Its preload determines the degree to which the pressure relief valve core blocks the passage between the inlet chamber 120 and the pressure relief chamber 110. When the preload of the pressure relief elastic element 330 is sufficient, the pressure relief valve core will tightly seal the passage between the liquid inlet chamber 120 and the pressure relief chamber 110.

[0047] During operation, the preload of the pressure relief elastic element 330 can be adjusted via the adjusting mechanism to control the degree of blockage of the pressure relief valve core in the channel, thereby regulating the working pressure range of the active silencer pressure relief valve. Transient noise generated by fluid pulsation during the movement of the pressure relief valve core is a common problem. This invention introduces a piezoelectric actuator 400, utilizing its active control capability to precisely adjust the force applied to the pressure relief valve core by the pressure relief elastic element 330, effectively eliminating this transient noise. This technology combines function (pressure regulation) and structure (noise suppression) into one, and is an active silencing technology capable of counteracting the pressure pulsation noise generated during the operation of the active silencer pressure relief valve.

[0048] The active noise-reducing pressure relief valve provided in this invention addresses the poor suppression effect of traditional passive pulsating noise by introducing an integrated active noise reduction technology into the pulsating noise control process through the arrangement of a piezoelectric actuator 400. This allows the force applied to the pressure relief valve core via the pressure relief elastic element 330 to eliminate transient noise caused by pulsating pressure during the movement of the pressure relief valve core. Furthermore, the adjusting element in this active noise-reducing pressure relief valve allows users to adjust the preload of the pressure relief elastic element 330 as needed, flexibly adjusting the operating pressure range of the active noise-reducing pressure relief valve.

[0049] In some embodiments, such as Figure 1 and Figure 2As shown, the active silencer and pressure relief valve further includes: a first sealing cover 600 and a second sealing cover 700; the valve body 100 is provided with a first mounting port and a second mounting port, the first sealing cover 600 is disposed in the first mounting port, and the second sealing cover 700 is disposed in 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 element is movably disposed on the first sealing cover 600.

[0050] Specifically, the first sealing cap 600 is installed on the first mounting port of the valve body 100. Its main function is to, together with one side of the pressure relief valve core, separate the interior of the valve body 100, forming a pressure relief chamber 110. This chamber is used to regulate and release fluid pressure. The second sealing cap 700, similar to the first sealing cap 600, is installed on the second mounting port of the valve body 100. It, together with the other side of the pressure relief valve core, separates the interior of the valve body 100, forming a liquid inlet chamber 120. This chamber is responsible for receiving fluid from an external system. An adjusting element is movably disposed on the first sealing cap 600. The user can adjust the preload of the pressure relief elastic element 330 by operating the adjusting element, thereby controlling the degree of blockage of the passage between the liquid inlet chamber 120 and the pressure relief chamber 110 by the pressure relief valve core.

[0051] In some embodiments, such as Figure 1 and Figure 2 As shown, the adjusting component includes an adjusting rod 310 and an adjusting end cap 320. The first end of the adjusting rod 310 is located outside the valve body 100, and the second end passes through the first sealing cover 600 and is rotatably mounted on the first sealing cover 600. A piezoelectric actuator 400 is connected to the second end of the adjusting rod 310, and a pressure relief elastic element 330 abuts between the second end of the adjusting rod 310 and the pressure relief valve core. The adjusting end cap 320 is connected to the first end of the adjusting rod 310.

[0052] Specifically, the adjusting rod 310 extends through a portion of the valve body 100 (through the first sealing cap 600) and allows the user to operate it from outside the valve body 100. The first end of the adjusting rod 310 is located outside the valve body 100, facilitating direct user operation or connection to other components; the second end passes through the first sealing cap 600 and is located inside the valve body 100, interacting directly with the piezoelectric actuator 400 and the pressure relief elastic element 330. An adjusting end cap 320 is attached to the first end of the adjusting rod 310. It provides an additional gripping point, protects the first end of the adjusting rod 310 from damage, or serves as a handle for controlling the adjusting rod 310. The second end of the adjusting rod 310 passes through the first sealing cap 600 and is rotatably mounted on it. The user can adjust the adjusting rod 310 from outside the valve body 100 by rotating the adjusting end cap 320, thereby adjusting the preload of the pressure relief elastic element 330. The piezoelectric actuator 400 is directly connected to the second end of the adjusting rod 310.

[0053] When the piezoelectric actuator 400 is activated, it will deform. This deformation is transmitted to the pressure relief elastic element 330 through the adjusting rod 310, thereby changing the degree of blockage of the passage between the pressure relief valve core and the liquid inlet chamber 120 and the pressure relief chamber 110.

[0054] In some embodiments, such as Figure 1 and Figure 2 As shown, the pressure relief valve core includes a valve seat 340, a valve disc 350, and a valve stem 360. The valve seat 340 is disposed between the inlet chamber 120 and the pressure relief chamber 110; the valve disc 350 is slidably disposed on the valve seat 340; the valve stem 360 passes through the valve disc 350, with its first end extending to the pressure relief chamber 110 and its second end extending to the inlet chamber 120; a pressure relief elastic element 330 is sleeved on the first end of the valve stem 360, and the pressure relief elastic element 330 is pressed between the valve disc 350 and the piezoelectric actuator 400.

[0055] In this embodiment, the valve seat 340 is the fixed part of the pressure relief valve core. It is disposed between the inlet chamber 120 and the pressure relief chamber 110, and serves to support and position the valve disc 350. The valve seat 340 typically has one or more sealing surfaces to ensure that the valve disc 350 can fit tightly when closed, preventing fluid leakage.

[0056] The valve disc 350 is the movable part of the pressure relief valve core, and it is slidably mounted on the valve seat 340. When the fluid pressure reaches the set value, the valve disc 350 will lift off the valve seat 340 under the action of the fluid pressure, allowing fluid to flow from the inlet chamber 120 into the pressure relief chamber 110, thereby releasing the pressure. When the fluid pressure decreases, the valve disc 350 will re-adhere to the valve seat 340 under the action of the pressure relief elastic element 330, closing the passage.

[0057] The valve stem 360 passes through the valve disc 350, with its first end extending to the pressure relief chamber 110 (possibly connected to or near the adjusting rod 310), and its second end extending to the liquid inlet chamber 120 (fixedly connected to a part of the valve disc 350). The valve stem 360 and the guide sleeve 500 form a kinematic pair, with the valve stem 360 cooperating with the guide sleeve 500 to constrain the radial degree of freedom of the valve disc 350.

[0058] The pressure relief elastic element 330 is sleeved on the first end of the valve stem 360 and pressed between the valve disc 350 and the piezoelectric actuator 400. When the piezoelectric actuator 400 is activated, it generates a driving force, which is transmitted to the valve disc 350 through the pressure relief elastic element 330 to eliminate transient noise caused by pulsating pressure when the valve disc 350 moves.

[0059] In some embodiments, such as Figure 1 and Figure 2As shown, the active silencer and pressure relief valve also includes a damping rod and a guide sleeve 500. The damping rod is connected to the second end of the adjusting rod 310; the first end of the guide sleeve 500 is movably sleeved on the outside of the damping rod, and the second end is sleeved on the first end of the valve stem 360. The piezoelectric actuator 400 is mounted on the guide sleeve 500.

[0060] In this embodiment, the damping rod's main function is to provide damping for the oscillation of the valve disc 350, reducing its overshoot; it is a passive vibration reduction and noise reduction measure. The guide sleeve 500 is a tubular component fitted onto the damping rod and the first end of the valve stem 360. Its first end is movably fitted outside the damping rod, and its second end is fitted onto 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, ensuring they move along a predetermined path. Furthermore, the guide sleeve 500 may also reduce friction and wear, improving the durability of the active silencer and pressure relief valve. The damping rod is connected to the second end of the adjusting rod 310, forming an integral structure with it. Thus, when the valve disc 350 moves relative to the valve seat 340, the damping rod moves within the guide sleeve 500, reducing the overshoot of the valve disc 350 through the resistance encountered during its movement. The piezoelectric actuator 400 is mounted 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 disc 350 through the guide sleeve 500, adjust the opening of the active silencer pressure relief valve, and cancel the pressure pulsation noise generated during the operation of the active silencer pressure relief valve.

[0061] In some embodiments, such as Figures 1 to 7 As shown, the piezoelectric actuator 400 includes: a first support plate 410, two support elastic elements 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 elements 420, the plurality of piezoelectric bodies 450 and the other support elastic element 420 in sequence, both support elastic elements 420 are supported between the first support plate 410 and the second support plate 430, the support elastic elements 420 abut against both ends of the plurality of piezoelectric bodies 450 respectively, and the pressure relief elastic element 330 is pressed between the second support plate 430 and the valve disc 350.

[0062] Specifically, the first support plate 410 serves as the fixed base for the piezoelectric actuator 400. It is connected to the guide sleeve 500, providing stable support for the piezoelectric element 450. The first support plate 410 typically possesses high rigidity and strength to ensure that the piezoelectric element 450 does not deform or shift during operation. The support elastic element 420 is an elastic element connecting 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 element 450. The support elastic element 420 is typically made of materials such as springs or elastic washers.

[0063] The second support plate 430 serves as another fixed base for the piezoelectric actuator 400. It is spaced apart from the first support plate 410 and connected to it via fasteners 440 and support elastic elements 420. The function of the second support plate 430 is to provide additional support for the piezoelectric element 450 and to transmit the driving force generated by the piezoelectric element 450 to the valve disc 350. The fasteners 440 pass through the central axis of the multiple piezoelectric elements 450, tightly connecting the piezoelectric elements 450 together to form a single integrated structure.

[0064] The piezoelectric element 450 is stacked sequentially between the first support plate 410 and the second support plate 430 along the extension direction of the fastener 440. The stacking direction of the piezoelectric element 450 is perpendicular to the setting direction of the first support plate 410 and the second support plate 430.

[0065] For example, when the piezoelectric elements 450 are subjected to an external electric field, they undergo slight deformation. The piezoelectric elements 450, composed of multiple stacked piezoelectric sheets, generate a lateral driving force. This lateral driving force controls the supporting elastic element 420, causing the first supporting plate 410 and the second supporting plate 430 to move relative to each other. The supporting elastic element 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 disc 350, adjusting the opening of the active silencer pressure relief valve and canceling the pressure pulsation noise generated during the operation of the active silencer pressure relief valve.

[0066] like Figures 3 to 7 As shown, the support elastic member 420 is divided into a first support elastic member and a second support elastic member. The first support elastic member is provided with a first notch near the fastener 440, the first support plate 410 and the support plate. The second support elastic member is provided with a second notch near the fastener 440, the first support plate 410 and the second support plate 430.

[0067] In this embodiment, the upper and lower ends of the first supporting elastic member are supported on the first support plate 410 and the second support 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 support plate 410 and the second support plate 430, and the fastener 440 passes through the middle of the second supporting elastic member. The first and second supporting elastic members respectively abut against the two ends of the plurality of piezoelectric elements 450.

[0068] When multiple piezoelectric elements 450 move to both sides under voltage control, the first and second support elastic elements can convert the lateral displacement into longitudinal displacement and amplify the displacement, which can drive the first support plate 410 and the second support plate 430 to move up and down, thereby applying the opening degree of the dynamic regulating valve to the valve disc 350 and canceling the pressure pulsation noise generated during the operation of the active silencer pressure relief valve.

[0069] Meanwhile, a first notch is provided on the first supporting elastic element near the fastener 440, the first supporting plate 410, and the supporting plate. The main function of the first notch is to reduce stress concentration on the first supporting elastic element under pressure, preventing it from failing due to excessive deformation. Simultaneously, the first notch also improves the flexibility of the first supporting elastic element, allowing it to better adapt to the deformation generated during the operation of the piezoelectric element 450. A second notch is provided on the second supporting elastic element near the fastener 440, the first supporting plate 410, and the second supporting plate 430. Similar to the first notch, the second notch also serves to reduce stress concentration and improve flexibility. By providing the first and second notches on the supporting elastic element 420, the stiffness of the connection part can be reduced, thereby better amplifying longitudinal displacement.

[0070] In some embodiments, such as Figures 3 to 7 As shown, the piezoelectric actuator 400 further includes: a first stop 460, a second stop 470, and two preload members 480; the first stop 460 and the second stop 470 are spaced apart and connected to the fastener 440, and the two preload members 480 are respectively disposed on the outside of the first stop 460 and the second stop 470, so that the first stop 460 and the second stop 470 are sandwiched on both sides of the plurality of piezoelectric bodies 450; wherein the middle part of one supporting elastic member 420 is sandwiched between the first stop and one preload member 480, and the middle part of another supporting elastic member 420 is sandwiched between the second stop 470 and the other preload member 480.

[0071] In this embodiment, the first stop 460 is a block-shaped component connected to the fastener 440, located on one side of the plurality of piezoelectric elements 450. The main function of the first stop 460 is to transmit the lateral movement of the piezoelectric elements 450 under pressure, while ensuring that they remain in a stable stacked structure. The second stop 470 is similar to the first stop 460, also a block-shaped component connected to the fastener 440, but it is located on the other side of the plurality of piezoelectric elements 450. The second stop 470 and the first stop 460 work together to clamp the piezoelectric elements 450 between them for transmitting lateral forces.

[0072] Preload members 480 are components located outside the first stop 460 and the second stop 470, and are typically fixed to fasteners 440 via threaded connections or other fastening methods. The main function of the preload members 480 is to provide additional preload force, ensuring that the first stop 460 and the second stop 470 are tightly clamped on both sides of the piezoelectric element 450, thereby further improving the stability and reliability of the piezoelectric actuator 400. Simultaneously, two support elastic members 420 are supported between the first support plate 410 and the second support plate 430. The middle portion of one support elastic member 420 is clamped between the first stop 460 and one preload member 480, while the middle portion of the other support elastic member 420 is clamped between the second stop 470 and the other preload member 480. This configuration allows the support elastic members 420 to effectively convert lateral displacement into longitudinal displacement and amplify the displacement.

[0073] In some embodiments, the active silencer pressure relief valve further includes a pressure sensor disposed in the inlet chamber 120 and / or the pressure relief chamber 110, and electrically connected to the piezoelectric actuator 400.

[0074] In this embodiment, pressure sensors are installed in the inlet chamber 120 and / or the pressure relief chamber 110 to monitor the fluid pressure in these areas in real time. By installing pressure sensors, it can be ensured that the active silencer pressure relief valve can accurately sense changes in fluid pressure and thus respond promptly.

[0075] In addition, the active silencer pressure relief valve also 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 the preset pressure threshold and pressure data, so as to adjust the driving force of the pressure relief elastic element 330 on the pressure relief valve core.

[0076] Specifically, the pressure sensor converts the collected pressure data into an electrical signal and transmits it to the control unit. By setting up the pressure sensor, the active silencer pressure relief valve can accurately sense changes in fluid pressure and respond promptly. 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 it with a preset pressure threshold. When the fluid pressure exceeds or falls below the preset pressure threshold, the control unit issues a command to start or stop the piezoelectric actuator 400, thereby adjusting the driving force of the pressure relief elastic element 330 on the pressure relief valve core. The control algorithm running on the control unit calculates the output signal, driving the piezoelectric actuator 400 to vibrate the valve disc, which can eliminate vibration noise caused by pipeline pulsating pressure.

[0077] By introducing pressure sensors and control units, the active silent pressure relief valve achieves real-time monitoring and precise control of fluid pressure. This intelligent design not only improves the reliability and stability of the equipment but also allows the active silent pressure relief valve to be flexibly adjusted according to the needs of different application scenarios.

[0078] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An active silencer and pressure relief valve, characterized in that, include: The valve body has an inlet chamber and a pressure relief chamber that are interconnected. A bypass pipe is connected to the liquid inlet chamber; A piezoelectric actuator and a pressure relief assembly, the pressure relief assembly including an adjusting member, a pressure relief elastic member, and a pressure relief valve core, the pressure relief valve core and the pressure relief elastic member being disposed in the pressure relief chamber, the adjusting member being movably disposed on the valve body, the piezoelectric actuator being disposed on the adjusting member, and the pressure relief elastic member being pressed between the piezoelectric actuator and the pressure relief valve core, so that the preload 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 element to eliminate transient noise caused by pulsating pressure when the pressure relief valve core moves; A first sealing cover and a second sealing cover; the valve body is provided with a first mounting port and a second mounting port, the first sealing cover is disposed at the first mounting port, and the second sealing cover is disposed at the second mounting port; 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 element is movably disposed on the first sealing cover; The adjusting component includes: an adjusting rod, with a first end located outside the valve body and a second end passing through the first sealing cover and rotatably mounted on the first sealing cover; a piezoelectric actuator connected to the second end of the adjusting rod; a pressure relief elastic element abutting between the second end of the adjusting rod and the pressure relief valve core; and an adjusting end cap connected to the first end of the adjusting rod. The pressure relief valve core includes: a valve seat, a valve disc, and a valve stem; the active silencer pressure relief valve further includes: a damping rod and a guide sleeve; the piezoelectric actuator includes: a first support plate, two supporting elastic elements, 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 sequentially, the fastener passes sequentially through one of the supporting elastic elements, the plurality of piezoelectric bodies, and another supporting elastic element, the two supporting elastic elements are both supported between the first support plate and the second support plate, the two supporting elastic elements respectively abut against the two ends of the plurality of piezoelectric bodies, and the pressure relief elastic element is pressed between the second support plate and the valve disc.

2. The active silencer and pressure relief valve according to claim 1, characterized in that, The pressure relief valve core includes: The valve seat is disposed between the liquid inlet chamber and the pressure relief chamber; The valve disc is slidably mounted on the valve seat; The valve stem passes through the valve disc, with its first end extending to the pressure relief chamber and its second end extending to the liquid inlet chamber. The pressure relief elastic element is sleeved on the first end of the valve stem and is pressed between the valve disc and the piezoelectric actuator.

3. The active silencer and pressure relief valve according to claim 2, characterized in that, The active silencer and pressure relief valve also includes: The damping rod is connected to the second end of the adjusting rod; The guide sleeve has a first end movably fitted outside the damping rod and a second end fitted around the first end of the valve stem. The piezoelectric actuator is mounted on the guide sleeve.

4. The active silencer and pressure relief valve according to claim 3, characterized in that, The two support elastic elements are divided into a first support elastic element and a second support elastic element. The first support elastic element has a first notch or groove near the fastener, the first support plate, and the support plate. The second support elastic element has a second notch or groove near the fastener, the first support plate, and the second support plate.

5. The active silencer and pressure relief valve according to claim 3, characterized in that, The piezoelectric actuator further includes: a first stop, a second stop, and two preload elements; The first stop and the second stop are connected to the fastener at a distance, and the two pre-tightening members are respectively disposed on the outside of the first stop and the second stop, so that the first stop and the second stop are clamped on both sides of the plurality of piezoelectric elements; One of the supporting elastic members is sandwiched between the first stop and one of the pre-tightening members, and the other supporting elastic member is sandwiched between the second stop and another of the pre-tightening members.

6. The active silencer and pressure relief valve according to any one of claims 1-5, characterized in that, The active silencer and pressure relief valve also includes: A pressure sensor is disposed in the inlet chamber and / or the pressure relief chamber and is electrically connected to the piezoelectric actuator.

7. The active silencer and pressure relief valve according to claim 6, characterized in that, The active silencer and pressure relief valve also includes: The control unit is electrically connected to the pressure sensor and the piezoelectric actuator. It 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 element on the pressure relief valve core.

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