A plunger pump cylinder capable of reducing noise

Abstract

The utility model relates to hydraulic equipment technical field, concretely is a plunger pump cylinder body that can reduce noise, including plunger pump main part, still including bottom plate, the tail of plunger pump main part is fixedly connected with cylinder body back cover through bolt, the side of plunger pump main part away from cylinder body back cover is fixedly connected with cylinder body front cover through inner hexagonal bolt, the outer surface of plunger pump main part is equipped with oil filler, and the oil filler is threadedly connected with sealing plug, the upper surface of bottom plate is fixedly connected with air bag noise reduction subassembly, the side of air bag noise reduction subassembly away from bottom plate is fixedly connected with the outer surface of plunger pump main part, and the outside wall of bottom plate is fixedly connected with two groups of mounting plate, beneficial effect is: the utility model discloses a air bag noise reduction subassembly is set up, when the plunger pump main part works and produces vibration, the support column pushes the upper pressure plate and moves down, and the rubber air bag is extruded, and the rubber air bag carries out buffering through the air exchange stretch, can absorb and consume vibration energy, thereby reducing the noise that plunger pump main part vibration sends out.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic equipment technology, specifically to a piston pump cylinder body that can reduce noise. Background Technology

[0002] A piston pump is the core power component of a hydraulic system. It changes the sealed volume by the reciprocating motion of the piston in the cylinder to achieve the intake and discharge of liquid. Because the piston and the cylinder are in a precise circular fit, it can withstand high pressure and has high volumetric efficiency. Variable control can be achieved by changing the piston stroke or the swashplate tilt angle. It is suitable for high-pressure, high-flow, and flow regulation-critical applications, such as construction machinery, ships, and CNC machine tools.

[0003] Traditional piston pumps mainly consist of a cylinder block, piston, swashplate, damping and noise reduction auxiliary structures. Internal noise is reduced through a multi-stage damping distribution structure. Specifically, the multi-stage damping distribution structure has three damping grooves: the first-stage damping groove is located in the oil suction area to reduce cavitation noise, the second-stage damping groove is located in the oil discharge area to attenuate pressure impact, and the third-stage damping groove is located in the annular groove to block vibration transmission, thereby reducing the internal noise of the piston pump during operation.

[0004] However, although traditional plunger pumps reduce internal noise to some extent through measures such as multi-stage damping distribution structures, the reciprocating motion of the plunger still causes significant vibration in the plunger pump cylinder during operation, and this vibration still generates noise. Utility Model Content

[0005] The purpose of this invention is to provide a piston pump cylinder body that can reduce noise, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a piston pump cylinder body that can reduce noise, including a piston pump body and a base plate. The rear end of the piston pump body is fixedly connected to a cylinder rear cover by bolts. The side of the piston pump body away from the cylinder rear cover is fixedly connected to a cylinder front cover by internal hex bolts. An oil inlet is provided on the outer surface of the piston pump body, and a sealing plug is connected to the oil inlet by internal threads. An airbag noise reduction component is fixedly connected to the upper surface of the base plate, and the side of the airbag noise reduction component away from the base plate is fixedly connected to the outer surface of the piston pump body.

[0007] Preferably, the outer side wall of the base plate is fixedly connected to two sets of mounting plates, the two sets of mounting plates are symmetrically arranged, each set of mounting plates has two mounting plates, and the upper surface of the mounting plate is provided with a fixing groove.

[0008] Preferably, the airbag noise reduction assembly includes an outer shell fixedly connected to the upper surface of the base plate, a lower pressure plate fixedly connected to the bottom of the inner cavity of the outer shell, a fixed cylinder fixedly connected to the upper surface of the lower pressure plate, a movable column slidably connected to the inner wall of the fixed cylinder, and an upper pressure plate fixedly connected to the end of the movable column away from the fixed cylinder.

[0009] Preferably, an upper mounting ring is fixedly connected to the side of the upper pressure plate near the movable column, and a lower mounting ring is fixedly connected to the side of the lower pressure plate near the fixed cylinder. A spring is sleeved on the outer wall of the fixed cylinder, one end of the spring is inserted into the inner wall of the upper mounting ring, and the other end of the spring away from the upper mounting ring is inserted into the inner wall of the lower mounting ring.

[0010] Preferably, a rubber airbag is fixedly connected between the upper pressure plate and the lower pressure plate. The inner wall of the rubber airbag is provided with a ventilation hole, and a ventilation pipe is fixedly connected to the outer surface of the rubber airbag. The ventilation pipe is connected to the ventilation hole.

[0011] Preferably, a limiting groove is formed through the outer surface of the outer shell, a limiting block is slidably connected to the inner wall of the limiting groove, the side of the limiting block away from the limiting groove is fixedly connected to the outer wall of the upper pressure plate, a support column is fixedly connected to the upper surface of the upper pressure plate, and the side of the support column away from the upper pressure plate is fixedly connected to the outer surface of the plunger pump body.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] This invention incorporates an airbag noise reduction component. When the plunger pump body vibrates during operation, the support column pushes the upper pressure plate downward, compressing the rubber airbag. The rubber airbag buffers the vibration through air exchange and expansion, absorbing and dissipating the vibration energy, thereby reducing the noise generated by the vibration of the plunger pump body. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the sealing plug structure of this utility model;

[0016] Figure 3 This is a schematic diagram of the airbag noise reduction component structure of this utility model;

[0017] Figure 4 This is a schematic diagram of the internal structure of the outer shell of this utility model;

[0018] Figure 5 This is a schematic diagram of the internal structure of the rubber airbag of this utility model.

[0019] In the diagram: 1. Piston pump body; 2. Oil inlet; 3. Cylinder block rear cover; 4. Airbag noise reduction assembly; 41. Outer shell; 42. Support column; 43. Limiting block; 44. Limiting groove; 45. Upper pressure plate; 46. Air exchange pipe; 47. Lower pressure plate; 48. Rubber airbag; 49. Movable column; 410. Upper mounting ring; 411. Spring; 412. Fixed cylinder; 413. Lower mounting ring; 5. Base plate; 6. Mounting plate; 7. Sealing plug; 8. Cylinder block front cover. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this utility model clear and complete, the embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some, not all, embodiments of this utility model, and are merely used to explain the embodiments of this utility model. They are not intended to limit the embodiments of this utility model. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0021] Please see Figures 1-5 The present invention provides the following two preferred embodiments:

[0022] Example 1: A piston pump cylinder body with noise reduction capability includes a piston pump body 1 and a base plate 5. A cylinder rear cover 3 is bolted to the tail of the piston pump body 1. A cylinder front cover 8 is bolted to the side of the piston pump body 1 away from the cylinder rear cover 3. An oil inlet 2 is provided on the outer surface of the piston pump body 1, and a sealing plug 7 is threaded into the oil inlet 2. An airbag noise reduction component 4 is fixedly connected to the upper surface of the base plate 5. The side of the airbag noise reduction component 4 away from the base plate 5 is fixedly connected to the outer surface of the piston pump body 1. Two sets of mounting plates 6 are fixedly connected to the outer side wall of the base plate 5. The two sets of mounting plates 6 are symmetrically arranged, and there are two mounting plates in each set. A fixing groove is provided through the upper surface of the mounting plate 6 to facilitate fixing the entire piston pump cylinder body 1 in the use position.

[0023] In actual use, when the plunger pump body 1 is in use, the base plate 5 is fixed in the use position by using bolts and other fasteners through the fixing groove on the mounting plate 6, and the output end of the plunger pump body 1 is connected to the external components, so that the plunger pump body 1 can work.

[0024] Example 2: The airbag noise reduction assembly 4 includes an outer shell 41 fixedly connected to the upper surface of the base plate 5. A lower pressure plate 47 is fixedly connected to the bottom of the inner cavity of the outer shell 41. A fixed cylinder 412 is fixedly connected to the upper surface of the lower pressure plate 47. A movable column 49 is slidably connected to the inner wall of the fixed cylinder 412. An upper pressure plate 45 is fixedly connected to the end of the movable column 49 away from the fixed cylinder 412. The movable column 49 is slidably connected to the inner wall of the fixed cylinder 412. This design can ensure that the upper pressure plate 45 moves stably in the vertical direction. An upper mounting ring 410 is fixedly connected to the side of the upper pressure plate 45 near the movable column 49. A lower mounting ring 413 is fixedly connected to the side of the lower pressure plate 47 near the fixed cylinder 412. A spring 411 is sleeved on the outer wall of the fixed cylinder 412. One end of the spring 411 is inserted into the inner wall of the upper mounting ring 410, and the end of the spring 411 away from the upper mounting ring 410 is inserted into the inner wall of the lower mounting ring 413. The upper mounting ring 410 and the lower mounting ring 413 are connected in a slidable manner. The ring 413 facilitates the installation and fixation of the spring 411, enabling the spring 411 to accurately exert its elastic recovery function and ensuring that the upper pressure plate 45 can be smoothly reset. A rubber air bladder 48 is fixedly connected between the upper pressure plate 45 and the lower pressure plate 47. A ventilation hole is opened through the inner wall of the rubber air bladder 48, and a ventilation pipe 46 is fixedly connected to the outer surface of the rubber air bladder 48. The ventilation pipe 46 is connected to the ventilation hole. A limit groove 44 is opened through the outer surface of the outer shell 41. A limit block 43 is slidably connected to the inner wall of the limit groove 44. The side of the limit block 43 away from the limit groove 44 is fixedly connected to the outer wall of the upper pressure plate 45. The cooperation of the limit groove 44 and the limit block 43 restricts the movement trajectory of the upper pressure plate 45 and prevents the upper pressure plate 45 from deviating during movement. A support column 42 is fixedly connected to the upper surface of the upper pressure plate 45. The side of the support column 42 away from the upper pressure plate 45 is fixedly connected to the outer surface of the plunger pump body 1.

[0025] In actual use, when the plunger pump body 1 vibrates during operation, the support column 42 will cause the upper pressure plate 45 to slide within the outer casing 41. When the support column 42 slides downward, it pushes the upper pressure plate 45 downward, forcing the upper pressure plate 45 to move towards the lower pressure plate 47. The upper pressure plate 45 then compresses the rubber air bladder 48. The rubber air bladder 48, compressed by the upper pressure plate 45, expels excess air from its interior through the ventilation hole and ventilation pipe 46. The expansion and contraction of the rubber air bladder 48 provides cushioning, thereby reducing the vibration of the plunger pump body 1 and lowering the noise generated by the vibration. After the springs 411 of the upper mounting ring 410 and the lower mounting ring 413 elastically return to their original positions, they push the upper pressure plate 45 back to its original position, causing the rubber air bladder 48 to expand and then return to its original position. While the rubber air bladder 48 expands, it draws in fresh air from the outside through the ventilation pipe 46 and ventilation hole, facilitating the next cushioning operation.

[0026] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A piston pump cylinder body with noise reduction capability, comprising a piston pump body (1) and a base plate (5), wherein a cylinder rear cover (3) is bolted to the tail of the piston pump body (1), and a cylinder front cover (8) is bolted to the side of the piston pump body (1) away from the cylinder rear cover (3), wherein an oil inlet (2) is provided on the outer surface of the piston pump body (1), and a sealing plug (7) is threaded into the oil inlet (2), characterized in that: An airbag noise reduction component (4) is fixedly connected to the upper surface of the base plate (5), and the side of the airbag noise reduction component (4) away from the base plate (5) is fixedly connected to the outer surface of the plunger pump body (1).

2. The piston pump cylinder body with noise reduction capability according to claim 1, characterized in that: The outer side wall of the base plate (5) is fixedly connected to two sets of mounting plates (6). The two sets of mounting plates (6) are arranged symmetrically, and there are two mounting plates (6) in each set. The upper surface of the mounting plate (6) is provided with a fixing groove.

3. The piston pump cylinder body with noise reduction capability according to claim 1, characterized in that: The airbag noise reduction assembly (4) includes an outer shell (41) fixedly connected to the upper surface of the base plate (5). A lower pressure plate (47) is fixedly connected to the bottom of the inner cavity of the outer shell (41). A fixed cylinder (412) is fixedly connected to the upper surface of the lower pressure plate (47). A movable column (49) is slidably connected to the inner wall of the fixed cylinder (412). An upper pressure plate (45) is fixedly connected to one end of the movable column (49) away from the fixed cylinder (412).

4. A piston pump cylinder body with noise reduction capability according to claim 3, characterized in that: The upper pressure plate (45) is fixedly connected to an upper mounting ring (410) on the side near the movable column (49), and the lower pressure plate (47) is fixedly connected to a lower mounting ring (413) on the side near the fixed cylinder (412). A spring (411) is sleeved on the outer wall of the fixed cylinder (412). One end of the spring (411) is inserted into the inner wall of the upper mounting ring (410), and the other end of the spring (411) away from the upper mounting ring (410) is inserted into the inner wall of the lower mounting ring (413).

5. A piston pump cylinder body with noise reduction capability according to claim 4, characterized in that: A rubber airbag (48) is fixedly connected between the upper pressure plate (45) and the lower pressure plate (47). The inner wall of the rubber airbag (48) is provided with a ventilation hole. A ventilation pipe (46) is fixedly connected to the outer surface of the rubber airbag (48). The ventilation pipe (46) is connected to the ventilation hole.

6. A piston pump cylinder body with noise reduction capability according to claim 3, characterized in that: A limiting groove (44) is formed through the outer surface of the outer shell (41). A limiting block (43) is slidably connected to the inner wall of the limiting groove (44). The side of the limiting block (43) away from the limiting groove (44) is fixedly connected to the outer wall of the upper pressure plate (45). A support column (42) is fixedly connected to the upper surface of the upper pressure plate (45). The side of the support column (42) away from the upper pressure plate (45) is fixedly connected to the outer surface of the plunger pump body (1).

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