Silencer for fluid pressure equipment

Abstract

The utility model provides a silencer for fluid pressure equipment, which comprises a shell, a bearing is fixedly mounted at the upper end in the shell, and a controller is fixedly mounted on the outer surface of the shell. According to the silencer for the fluid pressure equipment, the inclined plates, the partition plates, the silencing cavities, the blades, the controller and other structures are arranged, the inclined plates are installed on the two sides of the interior of the shell to guide fluid to change the flow direction, the partition plates divide the shell into the multiple silencing cavities, the sizes of the silencing cavities are gradually reduced, and the silencing cavities are provided with air passing holes; the blades flexibly rotate with the help of a bearing and a rotating rod, part of kinetic energy is converted into rotating energy under fluid impact, fluid is evenly dispersed, the flow speed is reduced, and direct impact noise on a noise reduction cavity structure is reduced; a controller cooperates with a pressure sensor and an electromagnetic regulating valve, and the pressure sensor monitors the pressure of a noise reduction cavity and feeds back the pressure; the controller processes the signal according to a preset algorithm and then controls the opening degree of the electromagnetic adjusting valve, and the fluid pressure and flow are accurately adjusted.

Description

Technical Field

[0001] This utility model relates to the field of silencer technology, and more specifically, to a silencer for fluid pressure equipment. Background Technology

[0002] Fluid pressure equipment, such as air compressors and hydraulic pumps, is widely used in many fields, including industrial production and energy. During operation, these devices generate significant noise due to factors such as high-speed fluid flow and pressure changes. This noise not only pollutes the working environment and affects the physical and mental health of operators, but may also interfere with the normal operation of other surrounding equipment.

[0003] However, existing mufflers have the following problems when in use:

[0004] In existing silencers, the fluid entering the silencer typically maintains its original flow pattern. This results in noise energy being concentrated and impacting the silencer structure, making it difficult to fully utilize the space and internal structure of the silencer chamber for effective sound wave dispersion and reduction. Furthermore, due to the lack of proper fluid guidance and dispersion, turbulence can easily form in localized areas due to the high-speed impact of the fluid, further exacerbating noise generation and propagation, thus significantly reducing the silencer's effectiveness. Moreover, because the unguided fluid directly impacts internal components of the silencer, such as baffles and sound-absorbing materials, the powerful impact can cause baffles to deform, loosen, or even crack, affecting the airtightness and structural integrity of the silencer chamber. For sound-absorbing materials, the concentrated impact force may cause compaction, displacement, or damage, preventing them from absorbing sound waves evenly and effectively, reducing their sound absorption performance, and thus shortening the silencer's lifespan. In severe cases, it may even lead to the complete failure of the silencer, rendering it unable to perform its normal silencer function.

[0005] This invention can effectively reduce the noise of fluid pressure equipment by using structures such as inclined plates, partitions, sound-absorbing cotton layers, and blades to reduce spectral noise, improve the working environment, and protect the health of personnel. It can also accurately regulate the internal fluid pressure and flow rate by relying on pressure sensors, controllers, and electromagnetic regulating valves to maintain stable operation, improve reliability and stability, reduce failures and losses, and ensure the efficient and safe operation of the system. Utility Model Content

[0006] The present invention aims to solve the technical problems mentioned in the background art and provide a silencer for fluid pressure equipment.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a silencer for fluid pressure equipment, comprising: a housing, a bearing fixedly installed at the upper end inside the housing, and a controller fixedly installed on the outer surface of the housing, characterized in that: an air inlet is provided at the upper end of the housing, an air outlet is provided at the bottom of the housing, inclined plates are fixedly installed on both the left and right sides inside the housing, a plurality of partitions are welded between the inclined plates, forming a silencing cavity between the partitions, and the size of the partitions gradually decreases with the spacing between the inclined plates.

[0008] A further preferred embodiment: both the air inlet and the air outlet are provided with connecting flanges, and the surface of the inclined plate and the inner side of the outer shell are coated with an anti-rust coating.

[0009] A further preferred embodiment: the surface of the partition plate is provided with several air holes, the upper sound-absorbing cavity is filled with a first layer of sound-absorbing cotton, and the lower sound-absorbing cavity is filled with a second layer of sound-absorbing cotton.

[0010] A further preferred embodiment: a rotating rod is rotatably connected inside the bearing, a base is rotatably mounted at the bottom of the rotating rod, the base is fixedly mounted on the upper end of the uppermost partition inside the outer casing, and several blades are fixedly mounted on the surface of the rotating rod.

[0011] A further preferred embodiment: an electromagnetic regulating valve is fixedly installed on the surface of the air outlet, and several pressure sensors are provided on the outer side of the inclined plate.

[0012] A further preferred embodiment: the pressure sensors are respectively installed on the inner wall of the silencing cavity in contact with the inclined plate, and the controller is matched with the electromagnetic regulating valve and the pressure sensors.

[0013] Beneficial effects:

[0014] 1. By incorporating bearings, a rotating rod, and blades, when noisy fluid rushes into the silencer at high speed and impacts the blades, the bearings, as a key supporting component, provide a reliable pivot point for the rotating rod, greatly reducing the frictional resistance during rotation and ensuring that the rotating rod can rotate flexibly and smoothly. The rotating rod acts as a bridge connecting and transmitting power, organically combining the blades and bearings, so that the power generated by the blades under the impact of the fluid can be smoothly converted into the rotational motion of the rotating rod. This rotational motion not only changes the original flow direction of the fluid, transforming it from a relatively concentrated linear flow to a dispersed rotational flow, but also generates a strong interaction between the blades and the fluid. This interaction effectively converts some of the fluid's kinetic energy into the rotational kinetic energy of the rotating rod, thereby significantly reducing the fluid's velocity and kinetic energy. Because the fluid with reduced velocity and kinetic energy can reduce the additional noise generated by direct impact on the internal structure of the silencer when it enters the silencer cavity, it greatly improves the overall silencer's silencing efficiency and performance stability.

[0015] 2. By configuring a sound-absorbing cavity, a first layer of sound-absorbing cotton, and a second layer of sound-absorbing cotton, the sound-absorbing cavity is divided by partitions. The partitions, with their gradually decreasing size, combined with the air vents on their surfaces, allow sound waves to undergo multiple reflections and interferences as they propagate within the sound-absorbing cavity. Sound waves of different frequencies are gradually weakened through these complex reflections and interferences. The first layer of sound-absorbing cotton focuses on absorbing high-frequency noise. Its material, such as glass wool, polyester fiber sound-absorbing cotton, or mineral wool, has a rich microporous structure. High-frequency noise has a short wavelength, and when it enters these pores, it causes intense vibrations of the air molecules within the pores. Due to the friction between the air and the sound-absorbing cotton fibers, and the air itself... With viscous resistance, under the combined effect of these factors, high-frequency sound energy can be quickly and efficiently converted into heat energy, thereby greatly reducing the energy of high-frequency noise and effectively weakening its propagation intensity. This makes the silencer perform excellently in dealing with high-frequency noise. The second layer of sound-absorbing cotton plays a key role in dealing with low-frequency noise. The materials used in it, such as open-cell foam plastic, rubber sound-absorbing material or fiber spraying material, have physical characteristics that are compatible with low-frequency noise. Low-frequency noise has a longer wavelength. When it enters the second layer of sound-absorbing cotton, it can generate a resonance phenomenon. Through this resonance, low-frequency sound energy is effectively converted into other forms of energy, such as heat energy or mechanical energy, thereby achieving the consumption of low-frequency noise.

[0016] 3. By setting up a limit slot controller, pressure sensor, and electromagnetic regulating valve, the pressure sensor accurately senses changes in fluid pressure inside the silencer and quickly converts them into electrical signals, which are then transmitted to the controller. The controller calculates and judges the pressure signal according to a preset program and algorithm. Once the pressure deviates from the preset range, it sends a control signal to the electromagnetic regulating valve. As an actuator, the electromagnetic regulating valve changes its opening degree according to the command. When the pressure is too high, the opening degree is increased to accelerate fluid outflow and reduce pressure; conversely, the opening degree is decreased to increase pressure. This achieves dynamic and precise regulation of fluid pressure and flow rate inside the silencer, enabling the silencer to operate stably under complex working conditions, always maintaining a good silencing effect, enhancing reliability and adaptability, effectively reducing equipment failure and downtime, improving the production efficiency of fluid pressure equipment systems, and reducing maintenance costs and operational risks.

[0017] 4. In summary, this type of silencer for fluid pressure equipment incorporates structures such as inclined plates, baffles, silencing chambers, blades, and a controller. The inclined plates, installed on both sides inside the outer casing, guide the fluid flow, changing its direction and allowing it to enter the silencing chambers more orderly. The baffles divide the outer casing into multiple silencing chambers, which gradually decrease in size and have vent holes. Utilizing the principles of sound wave reflection and interference, they effectively weaken the energy of sound waves at different frequencies. The blades, with the aid of bearings and rotating rods, rotate flexibly, converting some kinetic energy into rotational energy under fluid impact, uniformly dispersing the fluid and reducing flow velocity, thus minimizing direct impact noise on the silencing chamber structure. The controller works in conjunction with a pressure sensor and an electromagnetic regulating valve. The pressure sensor monitors and feeds back the silencing chamber pressure, while the controller processes the signal according to a preset algorithm and controls the opening of the electromagnetic regulating valve to precisely adjust the fluid pressure and flow rate. This ensures stable operation of the silencer under various working conditions and maintains a good silencing effect, effectively reducing the operating noise of fluid pressure equipment and providing strong support for stable equipment operation and improved working environment. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0019] Figure 2 This is a schematic diagram of the planar structure of this utility model.

[0020] Figure 3 This is a schematic diagram of the flow guiding structure of this utility model.

[0021] Figure 4 This is a schematic diagram of the partition structure of this utility model.

[0022] Figure 1-4Components: 1. Outer shell; 101. Air inlet; 102. Air outlet; 103. Connecting flange; 104. Inclined plate; 105. Partition plate; 106. Air passage hole; 107. Silencing chamber; 108. Sound-absorbing cotton layer one; 109. Sound-absorbing cotton layer two; 2. Bearing; 201. Rotating rod; 202. Base; 203. Blade; 3. Controller; 301. Electromagnetic regulating valve; 302. Pressure sensor. Detailed Implementation

[0023] The following will refer to the appendix in the embodiments of this utility model. Figures 1-4 The technical solutions in the embodiments of this utility model will be clearly and completely described.

[0024] Please see Figure 1-4In this embodiment of the present invention, a silencer for a fluid pressure device includes: a housing 1, a bearing 2 fixedly installed at the upper end inside the housing 1, a controller 3 fixedly installed on the outer surface of the housing 1, an air inlet 101 at the upper end of the housing 1, an air outlet 102 at the bottom of the housing 1, inclined plates 104 fixedly installed on both the left and right sides inside the housing 1, a plurality of partitions 105 welded between the inclined plates 104, forming a silencing cavity 107 between the partitions 105, the size of the partitions 105 gradually decreasing with the spacing between the inclined plates 104, a plurality of air passage holes 106 opened on the surface of the partitions 105, and a rotating rod 201 rotatably connected inside the bearing 2. A base 202 is rotatably mounted on the bottom of the rotating rod 201. The base 202 is fixedly mounted on the upper end of the uppermost partition 105 inside the outer casing 1. Several blades 203 are fixedly mounted on the surface of the rotating rod 201. An electromagnetic regulating valve 301 is fixedly mounted on the surface of the air outlet 102. Several pressure sensors 302 are set on the outer side of the inclined plate 104. The pressure sensors 302 are respectively set on the inner wall where the silencing cavity 107 contacts the inclined plate 104. The controller 3 is matched with the electromagnetic regulating valve 301 and the pressure sensors 302. The outer casing 1 serves as the overall external frame of the silencer, protecting the internal components and providing a closed space for the silencing process. Its material can be carbon steel or stainless steel. The bearing 2 is fixedly mounted inside the upper end of the outer casing 1, providing a support point for the rotation of the rotating rod 201, reducing the frictional resistance when the rotating rod 201 rotates, and allowing the rotating rod 201 to rotate flexibly. The rotating rod 201 is rotatably connected to the bearing 2, and its bottom is rotatably mounted on the uppermost partition 105 inside the outer casing 1 via the base 202. This structural design ensures the stable rotation of the rotating rod 201 within the outer casing 1. The inclined plates 104 on the left and right sides inside the outer casing 1 serve to initially guide the flow direction of the fluid, changing its flow direction before entering the silencing chamber 107, which is beneficial for the subsequent silencing process. Several partitions 105 welded between the inclined plates 104 divide the interior of the outer casing 1 into multiple silencing chambers 107. The size of the partitions 105 gradually decreases with the spacing between the inclined plates 104. This gradual design is to accommodate changes in pressure and flow rate during the fluid flow within the silencer. The surface of the baffle 105 has several vent holes 106. The size, number, and distribution density of the vent holes 106 affect the flow velocity of the fluid within the silencer cavity 107 and the reflection and interference effects of sound waves. Therefore, the number of vent holes 106 needs to be determined according to the actual usage. The controller 3 is fixedly installed on the outer surface of the housing 1. It can receive signals from the pressure sensor 302 and control and adjust the relevant operating parameters of the silencer according to the preset program and algorithm. It can work in conjunction with components such as the pressure sensor 302 and the solenoid regulating valve 301 to achieve precise control of parameters such as fluid pressure and flow rate inside the silencer, so as to ensure that the silencer maintains a good silencing effect and stable operation under different working conditions.When noisy fluid enters the silencer from the fluid pressure device via a pipe connected to the silencer's inlet 101, the fluid first contacts the blades 203 located at the upper end of the housing 1. Due to the fluid's velocity and pressure, the blades 203, under the impact of the fluid, drive the rotating rod 201 to rotate around the bearing 2. In this process, the blades 203 play a preliminary guiding role, uniformly dispersing the fluid and changing its flow direction, causing the fluid to flow along the guide plate 104 towards the silencer cavity 107. Simultaneously, the interaction between the blades 203 and the fluid converts part of the fluid's kinetic energy into the rotational kinetic energy of the rotating rod 201, reducing the fluid's velocity and kinetic energy, and decreasing the noise generated by the fluid directly impacting the internal structure of the silencer cavity 107. Guided by the inclined plate 104, the fluid enters the silencer cavity 107 formed by the partition 105. Inside the silencer cavity 107, the fluid flows between different silencer cavities 107 through the air passages 106 on the partition 105. When sound waves propagate within the silencing cavity 107, they are reflected and interfered with on the surface of the partition 105. Due to the gradually decreasing size of the partition 105 and the presence of the air vent 106, the reflection and interference conditions of sound waves continuously change within different silencing cavities 107, allowing sound waves of different frequencies to be effectively attenuated within the silencing cavity 107. Simultaneously, the air within the silencing cavity 107, acting as the propagation medium, also absorbs sound waves to a certain extent. The pressure sensor 302 installed within the silencing cavity 107 monitors the fluid pressure in real time and transmits the pressure signal to the controller 3. The controller 3 controls the electromagnetic regulating valve 301 according to the preset pressure range and control algorithm. When pressure sensor 302 detects that the fluid pressure is higher than the preset upper limit, controller 3 sends a signal to solenoid valve 301, causing the opening of solenoid valve 301 to increase, increasing the fluid outflow velocity, thereby reducing the fluid pressure inside the silencer. When the pressure is lower than the preset lower limit, controller 3 controls solenoid valve 301 to decrease the opening, reducing the fluid outflow velocity and causing the pressure to rise again. In this way, dynamic regulation of fluid pressure and flow rate inside the silencer is achieved, ensuring that the silencer operates under stable conditions and also helping to maintain a good silencing effect. After silencing treatment and pressure and flow rate regulation, the fluid flows out of the silencer through the air outlet 102 at the bottom of the outer casing 1, entering the subsequent pipeline system or being used directly.

[0025] In this embodiment of the invention, connecting flanges 103 are provided at both the air inlet 101 and the air outlet 102. The surface of the inclined plate 104 and the inner surface of the outer shell 1 are coated with an anti-corrosion coating. In the silencer for fluid pressure equipment, the connecting flanges 103 at the air inlet 101 and the air outlet 102 allow the silencer to be easily and securely connected to the fluid pressure equipment and subsequent piping systems. Its standardized design facilitates installation and disassembly. During equipment maintenance, repair, or system upgrades, the silencer can be easily separated from the entire pipeline, reducing the impact on surrounding equipment and pipeline layout. Simultaneously, the flange connection provides excellent sealing performance, effectively preventing fluid leakage at the connection point and ensuring the stability and safety of the entire fluid transmission system. The anti-corrosion coating on the surface of the inclined plate 104 and the inner surface of the outer shell 1 is to cope with the corrosive environment the silencer may face. In many fluid pressure equipment applications, the fluid may contain corrosive components such as moisture, acids, and alkalis. As a component that directly contacts the fluid and changes its flow direction, the inclined plate 104 is susceptible to corrosion and damage. The anti-corrosion coating forms a protective film on the surface of the inclined plate 104, preventing corrosive substances from contacting the metal substrate and extending its service life. Similarly, the inner surface of the outer casing 1 may come into contact with corrosive media caused by fluid leakage or evaporation. The coating prevents rust and corrosion inside the casing, maintaining its structural strength and sealing, ensuring the overall performance of the silencer is unaffected by corrosion, thus enabling stable operation for a longer period and reducing equipment maintenance costs and replacement frequency.

[0026] In this embodiment of the invention, the upper anechoic cavity 107 is filled with a first sound-absorbing cotton layer 108, and the lower anechoic cavity 107 is filled with a second sound-absorbing cotton layer 109. The first sound-absorbing cotton layer 108 is located in the upper anechoic cavity, and its material and structural characteristics are more focused on absorbing high-frequency noise. It can be any one of glass wool, polyester fiber sound-absorbing cotton, or mineral wool. Because high-frequency noise has a short wavelength, it is easier for it to interact with the micropore structure of the first sound-absorbing cotton layer 108 during propagation. When high-frequency sound waves enter the pores of the first sound-absorbing cotton layer 108, they will cause violent vibration of the air inside the pores. The friction between the air and the sound-absorbing cotton fibers, as well as the viscous resistance of the air, will quickly convert the sound energy into heat energy, thereby effectively reducing the energy of the high-frequency noise and weakening its propagation intensity. The second sound-absorbing cotton layer 109 is located in the lower silencing cavity. It may perform better in absorbing low-frequency noise. Its material can be any of the following: open-cell foam plastic, rubber sound-absorbing material (made by adding various additives and foaming agents to a rubber matrix), or fiber spraying material (a sound-absorbing material formed by spraying inorganic fibers (such as rock wool fiber, slag wool fiber, etc.) and binders onto the surface of the silencing cavity using special equipment). Low-frequency noise has a long wavelength, requiring sound-absorbing materials to have different physical properties to adapt to it, enabling low-frequency sound waves to resonate within it, thereby converting low-frequency sound energy into other forms of energy (such as heat energy or mechanical energy) for consumption. By setting the first sound-absorbing cotton layer 108 and the second sound-absorbing cotton layer 109 in different layers of the silencing cavity, comprehensive absorption of broadband noise can be achieved, improving the silencing effect of the silencer. This allows it to better cope with the complex noise spectrum generated during the operation of fluid pressure equipment, providing a quieter and more comfortable working environment, while also helping to protect surrounding equipment from noise interference and ensure stable operation.

[0027] Working Principle: Noisy fluid enters the silencer through the inlet 101 of the fluid pressure equipment via a pipeline. The connecting flange 103 at the inlet 101 ensures a stable and sealed connection with upstream equipment. The fluid first contacts the blades 203 located at the upper end of the housing 1. Due to the fluid's velocity and pressure, the blades 203 drive the rotating rod 201 to rotate around the bearing 2 under the fluid's impact. During this process, the blades 203 act as a preliminary guide, evenly dispersing the fluid and changing its flow direction, guiding it along the inclined plate 104 towards the silencing cavity 107. Simultaneously, the blades 203 interact with the fluid, converting some of the fluid's kinetic energy into the rotational kinetic energy of the rotating rod 201, reducing the fluid velocity and kinetic energy, and decreasing noise generated by the direct impact of the fluid on the internal structure of the silencing cavity 107. Guided by the inclined plate 104, the fluid enters the silencing cavity 107, formed by the partition 105. The size of the partition 105 gradually decreases with the spacing of the inclined plates 104, and the surface of the partition 105 has several air holes 106. This allows sound waves to be reflected and interfered with on the surface of the partition 105 when the fluid flows between different silencing cavities 107. Due to the structural characteristics of the partition 105, sound waves of different frequencies can be effectively attenuated within the silencing cavities 107. The sound-absorbing cotton layer 108 (made of any one of glass wool, polyester fiber sound-absorbing cotton, or mineral wool) in the upper silencing cavity 107 absorbs high-frequency noise. When high-frequency sound waves enter its pores, they cause the air inside the pores to vibrate violently. Through friction between the air and the sound-absorbing cotton fibers, as well as air viscosity resistance, the sound energy is converted into heat energy, reducing the energy and propagation intensity of high-frequency noise. The sound-absorbing cotton layer 109 (made of any one of open-cell foam plastic, rubber sound-absorbing material, or fiber-coated material) in the lower silencing cavity 107 targets low-frequency noise. Low-frequency sound waves resonate within the silencer, converting low-frequency sound energy into heat or mechanical energy for energy dissipation. Two layers of sound-absorbing cotton achieve comprehensive absorption of broadband noise, improving the silencing effect and addressing the complex noise spectrum generated by fluid pressure equipment. A pressure sensor 302, installed inside the silencing cavity 107 and contacting the inner wall of the inclined plate 104, monitors the fluid pressure in real time and transmits the pressure signal to the controller 3. The controller 3 controls the electromagnetic regulating valve 301 (installed on the surface of the outlet 102) according to a preset pressure range and control algorithm. When the pressure sensor 302 detects that the fluid pressure is higher than the preset upper limit, the controller 3 sends a signal to the electromagnetic regulating valve 301, increasing its opening and fluid outflow velocity, thereby reducing the fluid pressure inside the silencer. When the pressure is lower than the preset lower limit, the controller 3 controls the electromagnetic regulating valve 301 to decrease its opening, reducing the fluid outflow velocity and causing the pressure to rise again. In this way, dynamic regulation of the fluid pressure and flow rate inside the silencer is achieved, ensuring stable operation and maintaining a good silencing effect.After silencing and pressure and flow regulation, the fluid flows out of the silencer through the air outlet 102 at the bottom of the outer casing 1. Because the connecting flange 103 at the air outlet 102 ensures the stability and sealing of the connection with the subsequent pipeline system, the fluid can enter the subsequent pipeline system or be used directly.

Claims

1. A silencer for fluid pressure equipment, comprising: The outer shell (1) has a bearing (2) fixedly installed at the upper end inside the outer shell (1) and a controller (3) fixedly installed on the outer surface of the outer shell (1). The outer shell (1) is characterized by having an air inlet (101) at the upper end and an air outlet (102) at the bottom. Inclined plates (104) are fixedly installed on both the left and right sides inside the outer shell (1). Several partitions (105) are welded between the inclined plates (104). A sound-absorbing cavity (107) is formed between the partitions (105). The size of the partitions (105) gradually decreases with the distance between the inclined plates (104).

2. A silencer for fluid pressure equipment according to claim 1, characterized in that: Both the air inlet (101) and the air outlet (102) are provided with connecting flanges (103), and the surface of the inclined plate (104) and the inner side of the outer shell (1) are coated with a layer of anti-rust coating.

3. A silencer for fluid pressure equipment according to claim 2, characterized in that: The partition (105) has several air holes (106) on its surface. The upper silencing cavity (107) is filled with a first layer of sound-absorbing cotton (108), and the lower silencing cavity (107) is filled with a second layer of sound-absorbing cotton (109).

4. A silencer for fluid pressure equipment according to claim 1, characterized in that: The bearing (2) is rotatably connected to a rotating rod (201), and a base (202) is rotatably installed at the bottom of the rotating rod (201). The base (202) is fixedly installed on the upper end of the uppermost partition (105) inside the outer shell (1). Several blades (203) are fixedly installed on the surface of the rotating rod (201).

5. A silencer for fluid pressure equipment according to claim 1, characterized in that: An electromagnetic regulating valve (301) is fixedly installed on the surface of the air outlet (102), and several pressure sensors (302) are provided on the outer side of the inclined plate (104).

6. A silencer for fluid pressure equipment according to claim 5, characterized in that: The pressure sensors (302) are respectively installed on the inner wall of the silencing cavity (107) and the inclined plate (104) in contact. The controller (3) is matched with the electromagnetic regulating valve (301) and the pressure sensor (302).

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