Hydraulic pump with sound absorption and noise reduction functions

Abstract

The invention relates to the technical field of non-displacement pumps, in particular to a hydraulic pump with sound absorption and noise reduction functions, which comprises a noise reduction mechanism, a sound absorption assembly, a stabilizing assembly, a non-displacement hydraulic pump body, a positioning block and a mounting bolt, the noise reduction mechanism is arranged at the bottommost part and comprises a shell, a soft cushion, a telescopic ring, a telescopic rod, a supporting spring and a fixing assembly. The soft cushion is installed on the lower face of the shell, the telescopic ring is installed in the shell, the telescopic rod is installed in the center of the interior of the shell, the supporting spring is installed on the periphery of the telescopic rod, and the fixing assembly is installed on the lower face of the telescopic rod. The sound absorption assembly is installed on the noise reduction mechanism, and the stabilizing assembly is installed on the side face of the sound absorption assembly. The non-positive displacement hydraulic pump body is installed in the sound absorption assembly, the positioning block is installed at the center of the rear face of the non-positive displacement hydraulic pump body, and the installation bolts are arranged at the four corners of the rear face of the non-positive displacement hydraulic pump body.

Description

Technical Field

[0001] The invention relates to the technical field of non-displacement pumps, and in particular to a hydraulic pump with sound absorption and noise reduction functions. Background Art

[0002] A non-positive displacement hydraulic pump is a type of hydraulic pump whose characteristic is that the output flow rate varies with the load pressure and cannot provide a fixed flow rate. Its working principle mainly relies on high-speed rotation or fluid power to transport the liquid from the pump inlet to the outlet, rather than through the periodic volume change of the sealed cavity. Its characteristics are: the flow rate is not fixed and is easily affected by pressure fluctuations. It cannot be self-priming and needs to be pre-filled or used when the liquid level is higher than the pump. It is suitable for large flow and low pressure scenarios, such as cooling systems or lubrication systems. It works smoothly without pulsation, but cannot provide high-pressure output. Common types include: centrifugal pumps, which realize energy transfer by throwing the liquid to the pump casing through the rotation of the impeller. It is suitable for the transportation of low-viscosity liquids. Axial flow pumps, in which the liquid flows along the pump shaft, are suitable for large flow and low head occasions. Mixed flow pumps, which have both centrifugal and axial flow characteristics, have moderate flow and pressure.

[0003] The noise generated by non-positive displacement hydraulic pumps during operation mainly comes from the following aspects: Noise generated by friction and vibration when the rotating parts inside the pump (such as impellers and bearings) run at high speed. Bearing wear or poor assembly will also increase mechanical vibration, thereby aggravating noise. When the liquid flows at high speed in the pump, noise is generated due to eddy currents, turbulence or sudden changes in flow rate. Improper design of the impeller or guide vanes and fluid impact on the pump casing may also cause hydraulic impact noise. When the pump inlet pressure is too low, part of the liquid vaporizes to form bubbles, and the bubbles burst in the high-pressure area, causing cavitation. Cavitation not only generates noise, but also damages the internal surface of the pump body. The pump's structural parts or pipelines interact with the pump's vibration frequency at a specific frequency, causing resonance and increasing noise.

[0004] Noise can shorten the life of equipment. Long-term noise and vibration can accelerate the wear of pump shafts, impellers and bearings, reducing the service life of pumps. Noise is usually accompanied by energy loss. Severe cavitation or poor flow can reduce the efficiency of pumps. High noise environments can damage operators' hearing and affect work efficiency and comfort. Vibration and resonance can cause pumps and pipes to loosen, or even cause leaks, affecting the stability and safety of hydraulic systems.

[0005] In view of the above situation, in order to overcome the above technical problems, the present invention designs a hydraulic pump with sound absorption and noise reduction functions to solve the above technical problems. Summary of the invention

[0006] The technical objectives to be achieved by the present invention are: In order to achieve the above technical objectives, the present invention provides the following technical solutions: A hydraulic pump with sound absorption and noise reduction function, comprising a noise reduction mechanism, a sound absorption component, a stabilizing component, a non-displacement hydraulic pump body, a positioning block and mounting bolts; The noise reduction mechanism is arranged at the bottom, and comprises a shell, a cushion, a telescopic ring, a telescopic rod, a support spring and a fixing assembly; The shell is set to be a hollow cylinder at the bottom, and the shell is set to be a high-strength material to ensure the stability of the non-displacement hydraulic pump body. The soft pad is installed at the bottom of the shell, and the soft pad can be deformed to facilitate the up and down movement of the telescopic rod and the telescopic ring. The soft pad can further isolate the noise generated by the components inside the shell. The telescopic ring is installed inside the shell, and the telescopic rod is installed at the inner center of the shell. The support spring is installed on the periphery of the telescopic rod. The support spring is used to use elastic potential energy to buffer vibration, thereby reducing noise. The fixed component is installed below the telescopic rod; The sound absorbing component is installed on the top of the noise reduction mechanism, and is used to absorb the noise generated by the non-displacement hydraulic pump and perform sound insulation using a vacuum layer. The stabilizing component is installed on the side of the sound absorbing component, and is used to fix the non-displacement hydraulic pump and reduce the noise generated by the shaking of the mounting bolts. The non-displacement hydraulic pump body is installed inside the sound absorbing assembly, the positioning block is installed at the rear center of the non-displacement hydraulic pump body, and the mounting bolts are arranged at the rear four corners of the non-displacement hydraulic pump body.

[0007] Preferably, the soft cushion is made of rubber material, and the vertical cross-sectional shape of the soft cushion is set to be a trapezoid.

[0008] Preferably, the telescopic ring and the telescopic rod are coaxially arranged, and the interior of the telescopic rod is arranged as a hollow structure, and the hollow structure is used to conveniently contain hydraulic oil so as to utilize the hydraulic oil for buffering and shock absorption.

[0009] Preferably, the fixing assembly comprises a fixing sleeve, a matching annular groove, a hollow fixing column and a connecting flow channel; The fixed sleeve is installed inside the shell, and the matching ring groove is opened inside the fixed sleeve, and the matching ring groove is used to accommodate the telescopic ring so that it can move up and down. The hollow fixed column is set in the middle of the fixed sleeve, and the hollow fixed column is used to accommodate the telescopic rod so that it can move up and down. The connecting flow channel is opened between the matching ring groove and the hollow fixed column, and the connecting flow channel connects the hollow fixed column and the matching ring groove, so that the two form a connected oil circuit, so that in the process of pressing down or moving up the shell, the hydraulic oil can flow adaptively according to the pressure, thereby improving the stability and uniformity of the hydraulic oil shock absorption.

[0010] Preferably, hydraulic oil is provided in the mating ring groove, the hollow fixed column and the connecting flow channel. When the telescopic rod and the telescopic ring are pressed downward, the hydraulic oil will be squeezed into the hollow part of the upper telescopic rod, so that the up and down movement caused by the vibration will be absorbed by the hydraulic oil, and then further soundproofed by the outer shell and the soft pad, thereby reducing noise leakage.

[0011] Preferably, the sound absorbing assembly comprises a sound absorbing shell, a sound absorbing block, a connecting sleeve, a vacuum layer and a mounting hole; The sound absorbing shell is installed on the periphery of the non-volumetric hydraulic pump body, the sound absorbing blocks are arranged on the upper and lower surfaces inside the sound absorbing shell, the connecting sleeve is arranged on the side of the sound absorbing shell, the vacuum layer is arranged inside the sound absorbing shell, and the mounting hole is opened below the sound absorbing shell.

[0012] Preferably, the shape of the sound absorbing block is set to be a honeycomb, the honeycomb sound absorbing block is conducive to absorbing noise, and the sound absorbing block is set to be a loose porous structure.

[0013] Preferably, the stabilizing assembly comprises a stabilizing plate, a positioning ring and a shock absorbing assembly; The stabilizing plate is installed on the side of the sound absorbing component, the positioning ring is arranged on the side of the stabilizing plate, the positioning ring is used to cooperate with the positioning block for easy installation, and the shock absorbing component is arranged on the outside of the positioning ring.

[0014] Preferably, the shock absorbing assembly comprises a mounting slot, a shock absorbing spring and a shock absorbing block; The installation groove is arranged on the outer side of the positioning ring, one end of the shock absorbing spring is arranged in the installation groove, and the shock absorbing block is installed on the other end of the shock absorbing spring.

[0015] Preferably, the shock absorbing block is arranged in a fan ring shape, and the outer end of the shock absorbing block is rounded. When the mounting bolt is inserted into the mounting groove, the rounded corner of the shock absorbing block can reduce friction, thereby extending the service life.

[0016] The beneficial effects of the present invention are as follows: (1) The present invention realizes effective control of the noise and vibration generated by the non-volumetric hydraulic pump by providing a noise reduction mechanism, a sound-absorbing component and a stabilizing component. First, a sound-absorbing shell is provided on the outside of the hydraulic pump body, and a sound-absorbing block is embedded in the shell, which can effectively absorb various types of noise generated during the operation of the hydraulic pump and reduce the sound spillage from the source. In addition, a vacuum layer is provided between the sound-absorbing shell and the hydraulic pump body. The vacuum layer acts as a sound insulation barrier, which can block and isolate the propagation path of most noise, thereby significantly reducing the noise interference of the hydraulic pump to the external environment during operation.

[0017] (2) The present invention is aimed at the vibration noise generated by the connection between the non-displacement hydraulic pump and other components during operation. The present invention has specially designed a noise reduction mechanism. The noise reduction mechanism weakens and disperses the vibration generated by the operation of the equipment by setting a buffer system composed of a support spring and hydraulic oil. The support spring can absorb and alleviate the vibration fluctuation, and the flow characteristics of the hydraulic oil further flexibly dissipate the vibration energy, so that the vibration cannot be directly transmitted to the outside of the equipment, thereby effectively reducing the noise problem caused by the vibration.

[0018] (3) Through the comprehensive application of this whole set of noise reduction and stabilization systems, the present invention comprehensively controls the noise and vibration problems of non-positive displacement hydraulic pumps from multiple angles and levels, effectively improving the stability and quietness of equipment operation, and providing an efficient and reliable solution to the noise reduction needs of hydraulic equipment in the industrial field. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] The above and other aspects of the present invention will now be described, by way of example only, with reference to the accompanying drawings, in which: Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the installation position of the non-displacement hydraulic pump body, the positioning block and the mounting bolts of the present invention; Figure 3 It is a schematic diagram of the structure of the sound absorbing component of the present invention; Figure 4 It is a schematic diagram of the internal structure of the noise reduction mechanism of the present invention; Figure 5 It is a schematic diagram of the structure of the fixing assembly of the present invention; Figure 6 It is a schematic diagram of the internal structure of the sound absorbing component of the present invention; Figure 7 It is a schematic diagram of the structure of the stabilizing assembly of the present invention; Figure 8 It is a schematic diagram of the structure of the shock absorbing assembly of the present invention.

[0021] In the figure: 1. noise reduction mechanism; 11. shell; 12. cushion; 13. telescopic ring; 14. telescopic rod; 15. support spring; 16. fixing assembly; 161. fixing sleeve; 162. matching ring groove; 163. hollow fixing column; 164. connecting flow channel; 2. sound absorbing assembly; 21. sound absorbing shell; 22. sound absorbing block; 23. connecting sleeve; 24. vacuum layer; 25. mounting hole; 3. stabilizing assembly; 31. stabilizing plate; 32. positioning ring; 33. shock absorbing assembly; 331. mounting groove; 332. shock absorbing spring; 333. shock absorbing block; 4. non-volumetric hydraulic pump body; 5. positioning block; 6. mounting bolts. DETAILED DESCRIPTION

[0022] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0023] like Figure 1-8 As shown, a hydraulic pump with sound absorption and noise reduction function includes a noise reduction mechanism 1, a sound absorption component 2, a stabilizing component 3, a non-volumetric hydraulic pump body 4, a positioning block 5 and a mounting bolt 6, aiming to achieve efficient, silent and stable operation through a multi-layer noise reduction design.

[0024] First, the noise reduction mechanism 1 is located at the bottom of the entire device and is the basic part of the noise reduction of the hydraulic pump. The mechanism consists of a shell 11, a cushion 12, a telescopic ring 13, a telescopic rod 14, a support spring 15 and a fixing assembly 16. The shell 11 is designed as a hollow cylinder at the bottom and is made of high-strength material, which can provide solid support and stability for the non-volumetric hydraulic pump body 4. At the same time, the strength design of the shell 11 effectively improves its durability and anti-deformation ability, and can ensure the normal operation of the hydraulic pump even under complex working conditions. A cushion 12 is installed at the bottom of the shell 11. The cushion 12 has excellent deformation ability and can adapt to the up and down movement of the telescopic rod 14 and the telescopic ring 13. At the same time, it has a certain sound insulation effect, which further reduces the noise propagation generated by the operation of the internal components of the shell 11.

[0025] A telescopic ring 13 and a telescopic rod 14 are designed inside the housing 11. The telescopic rod 14 is fixed at the center of the housing 11, and its periphery is wrapped with a support spring 15. The support spring 15 absorbs and buffers the vibration energy during operation through elastic potential energy, which can significantly weaken the vibration effect of the hydraulic pump during operation, thereby reducing the noise caused by vibration transmission. In addition, a fixing component 16 is installed at the bottom of the telescopic rod 14 to further enhance the stability and precision of the telescopic rod 14 and ensure the overall operating reliability of the noise reduction mechanism 1.

[0026] A sound absorbing component 2 is installed above the noise reduction mechanism 1. The sound absorbing component 2 is designed to absorb the noise generated by the non-volumetric hydraulic pump body 4 during operation, and to perform sound insulation through the vacuum layer 24 provided inside the sound absorbing component 2. The vacuum layer 24 uses the principle of physical isolation to effectively block the sound propagation path, thereby achieving a more efficient noise control effect. The sound absorbing component 2 can not only absorb the sound directly generated by the hydraulic pump, but also isolate the noise interference that may be transmitted from the surrounding environment, providing multiple guarantees for the quiet operation of the equipment.

[0027] The stabilizing component 3 is installed on the side of the sound absorbing component 2, and the stabilizing component 3 plays an important role in the overall operation of the device. Its main function is to fix the non-displacement hydraulic pump body 4, and at the same time reduce the shaking of the mounting bolts 6 during operation and the additional noise caused by it. Through the precisely designed stable structure, the stabilizing component 3 effectively reduces the noise problem caused by the loose connection parts of the equipment, and further improves the stability and reliability of the device operation.

[0028] The non-displacement hydraulic pump body 4 is installed inside the sound absorbing component 2 and is the core working unit of the device. A positioning block 5 is installed at the rear center of the hydraulic pump body to accurately locate the position of the hydraulic pump in the sound absorbing component 2 to ensure the stability and reliability of the equipment during operation. In addition, mounting bolts 6 are installed at the four corners of the rear of the pump body. These bolts further strengthen the fixing effect of the hydraulic pump through the synergistic effect of the stabilizing component 3, effectively avoiding the noise problem caused by loosening or vibration of the bolts.

[0029] In general, the hydraulic pump achieves comprehensive optimization from vibration absorption, noise isolation to stability improvement through the coordinated work of the noise reduction mechanism 1, the sound absorbing component 2 and the stabilizing component 3. This design not only effectively reduces the noise and vibration during the operation of the non-positive displacement hydraulic pump, but also significantly improves the working performance and service life of the equipment, providing an innovative solution to the demand for efficient and silent hydraulic equipment in industrial scenarios.

[0030] like Figure 4 As shown, the cushion 12 is made of rubber material. The rubber material itself has good elasticity and flexibility, and can effectively absorb the vibration and impact force generated during the operation of the hydraulic pump, thereby reducing the spread of vibration noise. The trapezoidal cross-section design enables the cushion 12 to gradually deform when subjected to vertical pressure, effectively dispersing the load and further improving the shock absorption effect. The vertical cross-sectional shape of the cushion 12 is set to a trapezoid. The trapezoidal cross-section is wide at the bottom and narrow at the top, and the bottom contact area is large, which helps to increase the contact area with the bottom of the outer shell 11 and provide better support and stability. This structure can effectively prevent the cushion 12 from displacement or sliding during the operation of the hydraulic pump, ensuring that the hydraulic pump body always remains stable.

[0031] The telescopic ring 13 and the telescopic rod 14 are coaxially arranged, and the interior of the telescopic rod 14 is arranged as a hollow structure, which is used to conveniently contain hydraulic oil so as to use the hydraulic oil for buffering and shock reduction. The telescopic ring 13 and the telescopic rod 14 are coaxially arranged to ensure structural stability and operation accuracy. The interior of the telescopic rod 14 is hollow and is used to store hydraulic oil. The flow of hydraulic oil absorbs and buffers vibration, thereby achieving a more efficient shock reduction effect, thereby reducing vibration and noise during the operation of the hydraulic pump.

[0032] like Figure 5 As shown, the fixing assembly 16 includes a fixing sleeve 161, a matching annular groove 162, a hollow fixing column 163 and a connecting flow channel 164; The fixed sleeve 161 is installed inside the housing 11, and the matching annular groove 162 is provided inside the fixed sleeve 161. The matching annular groove 162 is used to accommodate the telescopic ring 13 so that it can move up and down. The hollow fixed column 163 is provided in the middle of the fixed sleeve 161. The hollow fixed column 163 is used to accommodate the telescopic rod 14 so that it can move up and down. The connecting flow channel 164 is provided between the matching annular groove 162 and the hollow fixed column 163. The connecting flow channel 164 connects the hollow fixed column 163 and the matching annular groove 162, so that the two form a connected oil circuit, so that when the housing 11 is pressed down or moved up, the hydraulic oil can flow adaptively according to the pressure, thereby improving the stability and uniformity of the hydraulic oil shock absorption. The fixed sleeve 161 is located inside the housing 11, and the matching annular groove 162 inside is used to accommodate the telescopic ring 13 so that it can move up and down smoothly. The hollow fixed column 163 is located in the center of the sleeve, and is used to accommodate and guide the telescopic rod 14 to slide up and down. The matching annular groove 162 and the hollow fixed column 163 are connected through the connecting flow channel 164 to form a through oil path. When the housing 11 is pressurized or moves upward, the hydraulic oil flows adaptively according to the pressure through the flow channel, ensuring that the shock absorption process is more stable and uniform, and effectively improving the shock absorption performance and stability of the hydraulic pump during operation.

[0033] Hydraulic oil is injected into the ring groove, the hollow fixed column 163 and the connecting flow channel 164 to form a complete hydraulic shock absorption system. During the operation of the hydraulic pump, when the telescopic rod 14 and the telescopic ring 13 are pressed down due to vibration or external force, the hydraulic oil is squeezed and quickly enters the hollow cavity on the upper layer of the telescopic rod 14. The hydraulic oil effectively absorbs and disperses the vibration energy during the flow process, buffering the original violent up and down movement into a smooth hydraulic flow.

[0034] The presence of hydraulic oil gradually attenuates the vibration, reducing the impact of mechanical vibration on the outside world from the source. Subsequently, the residual vibration energy is further absorbed and soundproofed by the outer shell 11 and the cushion 12 to prevent the spread of noise. The multi-layer shock absorption and noise reduction structure work together to significantly reduce the noise leakage problem during equipment operation, improve the quiet performance of the hydraulic pump and the comfort of the use environment, and meet the high requirements for low-noise equipment.

[0035] like Figure 3 and 6 As shown, the sound-absorbing assembly 2 is composed of a sound-absorbing shell 21, a sound-absorbing block 22, a connecting sleeve 23, a vacuum layer 24 and a mounting hole 25. The overall design is intended to effectively absorb and isolate the noise generated during the operation of the hydraulic pump, thereby improving the quiet performance of the equipment. The sound-absorbing shell 21 is installed on the periphery of the non-volumetric hydraulic pump body 4, fully wrapping the hydraulic pump body to form the first layer of sound insulation barrier. Sound-absorbing blocks 22 are arranged on both the upper and lower surfaces of the shell to ensure that the noise generated by the hydraulic pump is absorbed from multiple directions, reducing the possibility of sound propagation outward.

[0036] The sound-absorbing block 22 adopts a honeycomb design. This structure is not only beautiful and lightweight, but more importantly, its complex porous path can greatly improve the sound absorption effect, effectively capture and disperse sound waves, thereby reducing noise reflection. In addition, the sound-absorbing block 22 is made of loose and porous material, which further enhances the sound absorption performance, so that the sound is gradually consumed after entering the porous structure, reducing the noise intensity heard by the outside world.

[0037] A connecting sleeve 23 is provided on the side of the sound-absorbing shell 21 for connecting with other components or structures to maintain the stability and coordination of the whole device. A vacuum layer 24 is designed inside the sound-absorbing shell 21, which can isolate the air propagation path, prevent noise from spreading outward, and achieve a more significant sound insulation effect. The mounting hole 25 below facilitates the connection of the sound-absorbing component 2 with the hydraulic pump body or other fixed structures, ensuring convenient and firm installation.

[0038] Overall, the sound-absorbing component 2 significantly improves the noise reduction effect of the hydraulic pump through its multi-layer structure and innovative material design, providing important guarantees for the stability and quiet environment of the equipment during operation.

[0039] like Figure 7 As shown, the stabilizing assembly 3 is composed of a stabilizing plate 31, a positioning ring 32 and a shock absorbing assembly 33, which is intended to improve the operating stability of the hydraulic pump and reduce the impact of vibration. The stabilizing plate 31 is fixedly installed on the side of the sound absorbing assembly 2, and serves as the main supporting structure of the stabilizing assembly 3, providing lateral support for the hydraulic pump to prevent displacement or shaking of the equipment during operation.

[0040] The positioning ring 32 is arranged on the side of the stabilizing plate 31, and is mainly used to cooperate with the positioning block 5 on the hydraulic pump body to achieve fast and accurate alignment and fixation, simplify the installation process, and improve assembly efficiency. In addition, the presence of the positioning ring 32 ensures that the hydraulic pump body maintains an accurate position during operation, preventing the equipment from being offset due to vibration and affecting working performance.

[0041] A shock absorbing assembly 33 is arranged outside the positioning ring 32 to further absorb and buffer the vibration generated during the operation of the hydraulic pump, thereby reducing the damage to the equipment caused by vibration and extending the service life. The multiple protection design of the stabilizing assembly 3 significantly improves the stability and durability of the hydraulic pump.

[0042] like Figure 8 As shown, the shock absorbing assembly 33 is composed of a mounting groove 331, a shock absorbing spring 332 and a shock absorbing block 333, which is intended to effectively buffer the vibration generated during the operation of the hydraulic pump and improve the overall stability and durability of the equipment. The mounting groove 331 is precisely opened on the outside of the positioning ring 32, providing a stable installation position for the shock absorbing spring 332 and the shock absorbing block 333. One end of the shock absorbing spring 332 is fixed in the mounting groove 331, and the other end is connected to the shock absorbing block 333. Through elastic action, it absorbs and disperses the vibration energy generated during the operation of the hydraulic pump, reducing the impact of vibration on the equipment and the surrounding environment.

[0043] The shock absorbing block 333 is designed to be a fan-shaped ring structure. This shape can not only fit tightly with the positioning ring 32, but also disperse the pressure more evenly during the vibration transmission process, thereby improving the shock absorption effect. The outer end of the shock absorbing block 333 is specially rounded, and this design plays an important role in the installation process. When the mounting bolt 6 is inserted into the mounting groove 331, the rounded corners can effectively reduce the friction with the groove wall, avoid wear problems caused by repeated friction, and thus extend the service life of the shock absorbing block 333.

[0044] Through the combined design of the mounting groove 331, the spring and the shock absorbing block 333, the shock absorbing assembly 33 not only significantly improves the anti-seismic performance of the hydraulic pump, but also enhances the stability and service life of the equipment, providing a strong guarantee for long-term stable operation.

[0045] During operation of the present invention, the non-volumetric hydraulic pump body 4 is installed inside the sound-absorbing shell 21, and the mounting bolt 6 arranged on the back thereof is snapped into the mounting groove 331. The non-volumetric hydraulic pump body 4 will generate vibration during operation. When the mounting bolt 6 shakes in the mounting groove 331, a plurality of shock-absorbing blocks 333 are arranged around the mounting bolt 6 for stabilization, and the shock-absorbing spring 332 is used to reduce the vibration amplitude of the mounting bolt 6, thereby reducing noise and improving installation stability.

[0046] The noise generated by the non-displacement hydraulic pump body 4 during operation will be initially absorbed by the sound absorbing block 22, and when it is transmitted out of the sound absorbing housing 21, it will be further isolated by the vacuum layer 24; When the non-volumetric hydraulic pump body 4 vibrates, the sound-absorbing shell 21 will vibrate accordingly and transmit the vibration to the object fixed to it; the outer shell 11 moves up and down under the force, and the telescopic rod 14 and the telescopic ring 13 move up and down. When pressing down, hydraulic oil is used for buffering and shock absorption. When moving up, the speed is slowed down under the pressure, thereby reducing the amplitude of vibration and thus reducing noise.

[0047] Various modifications to the present disclosure will be apparent to those of ordinary skill in the art, and the general principles defined herein may be applied to other variations without departing from the scope of the present disclosure. Therefore, the present disclosure is not limited to the examples and designs described herein, but should be given the widest scope consistent with the principles and novel features disclosed herein. Although one or more exemplary embodiments of the present disclosure have been described with reference to the accompanying drawings, it will be understood by those of ordinary skill in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the present disclosure as defined in the appended claims.

Claims

1. A hydraulic pump with sound absorption and noise reduction function, characterized in that: It comprises a noise reduction mechanism (1), a sound absorbing component (2), a stabilizing component (3), a non-displacement hydraulic pump body (4), a positioning block (5) and mounting bolts (6); The noise reduction mechanism (1) is arranged at the bottom, and comprises a housing (11), a soft cushion (12), a telescopic ring (13), a telescopic rod (14), a support spring (15), and a fixing assembly (16); The outer shell (11) is configured to be a hollow cylindrical shape at the bottom, the soft cushion (12) is mounted at the bottom of the outer shell (11), the telescopic ring (13) is mounted inside the outer shell (11), the telescopic rod (14) is mounted at the inner center of the outer shell (11), the support spring (15) is mounted on the periphery of the telescopic rod (14), and the fixing assembly (16) is mounted at the bottom of the telescopic rod (14); The sound absorbing component (2) is mounted on the top of the noise reduction mechanism (1), and the stabilizing component (3) is mounted on the side of the sound absorbing component (2); The non-displacement hydraulic pump body (4) is installed inside the sound absorbing assembly (2), the positioning block (5) is installed at the center of the rear of the non-displacement hydraulic pump body (4), and the mounting bolts (6) are arranged at the four corners of the rear of the non-displacement hydraulic pump body (4).

2. A hydraulic pump with sound absorption and noise reduction function according to claim 1, characterized in that: The soft pad (12) is made of rubber material, and the vertical cross-sectional shape of the soft pad (12) is set to be a trapezoid.

3. The hydraulic pump with sound absorption and noise reduction function according to claim 1, characterized in that: The telescopic ring (13) and the telescopic rod (14) are coaxially arranged, and the interior of the telescopic rod (14) is arranged as a hollow structure.

4. The hydraulic pump with sound absorption and noise reduction function according to claim 1, characterized in that: The fixing assembly (16) comprises a fixing sleeve (161), a matching annular groove (162), a hollow fixing column (163) and a connecting flow channel (164); The fixed sleeve (161) is installed inside the housing (11), the matching annular groove (162) is opened inside the fixed sleeve (161), the hollow fixed column (163) is arranged in the middle of the fixed sleeve (161), and the connecting flow channel (164) is opened between the matching annular groove (162) and the hollow fixed column (163).

5. The hydraulic pump with sound absorption and noise reduction function according to claim 4, characterized in that: Hydraulic oil is provided in the matching annular groove (162), the hollow fixing column (163) and the connecting flow channel (164).

6. The hydraulic pump with sound absorption and noise reduction function according to claim 1, characterized in that: The sound absorbing assembly (2) comprises a sound absorbing shell (21), a sound absorbing block (22), a connecting sleeve (23), a vacuum layer (24) and a mounting hole (25); The sound absorbing shell (21) is mounted on the periphery of the non-displacement hydraulic pump body (4), the sound absorbing block (22) is arranged on the upper and lower surfaces inside the sound absorbing shell (21), the connecting sleeve (23) is arranged on the side surface of the sound absorbing shell (21), the vacuum layer (24) is arranged inside the sound absorbing shell (21), and the mounting hole (25) is opened below the sound absorbing shell (21).

7. The hydraulic pump with sound absorption and noise reduction function according to claim 6, characterized in that: The shape of the sound absorbing block (22) is set to be a honeycomb, and the sound absorbing block (22) is set to be a loose porous structure.

8. The hydraulic pump with sound absorption and noise reduction function according to claim 1, characterized in that: The stabilizing assembly (3) comprises a stabilizing plate (31), a positioning ring (32) and a shock absorbing assembly (33); The stabilizing plate (31) is installed on the side of the sound absorbing component (2), the positioning ring (32) is arranged on the side of the stabilizing plate (31), and the shock absorbing component (33) is arranged on the outside of the positioning ring (32).

9. The hydraulic pump with sound absorption and noise reduction function according to claim 8, characterized in that: The shock absorbing assembly (33) comprises a mounting slot (331), a shock absorbing spring (332) and a shock absorbing block (333); The installation groove (331) is opened on the outside of the positioning ring (32); one end of the shock absorbing spring (332) is arranged in the installation groove (331); and the shock absorbing block (333) is installed on the other end of the shock absorbing spring (332).

10. The hydraulic pump with sound absorption and noise reduction function according to claim 9, characterized in that: The shock absorbing block (333) is arranged in a fan-shaped ring shape, and the outer end of the shock absorbing block (333) is rounded.

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