Non-uniform distribution hydraulic plunger pump cylinder body

Abstract

The invention discloses a non-uniform distribution hydraulic plunger pump cylinder body, and relates to the technical field of hydraulic equipment, the non-uniform distribution hydraulic plunger pump cylinder body comprises a cylinder body used for being matched with an oil distribution disc, and is characterized in that the cylinder body is provided with a plurality of plunger holes which are arranged at equal radians, the included angle between every two adjacent plunger holes is a, each plunger hole is connected with a kidney-shaped oil groove, and the included angles of every two adjacent kidney-shaped oil grooves are different. Wherein a ranges from 30 degrees to 45 degrees, and the included angle difference value of every two adjacent kidney-shaped oil grooves ranges from + / -4 degrees. The kidney-shaped oil ports are non-uniformly distributed in the positions matched with the plunger holes, so that the switching time of each plunger hole between the suction stroke and the discharge stroke is changed, and the effects of smoothing and dispersing pressure fluctuation and effectively reducing noise are achieved. Meanwhile, on the basis of 71 displacement, the noise is reduced to be lower than 45 decibels from higher than 75 decibels, and meanwhile the effect of effectively controlling and improving the cost increase of the cylinder body structure is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of hydraulic equipment, and more specifically to a non-uniformly distributed hydraulic plunger pump cylinder. Background Art

[0002] In the field of industrial hydraulics, the working environment has a significant impact on the workers, especially the noise level will directly affect the physical and mental health of the workers. Therefore, there are certain restrictions on the low noise standards for indoor hydraulic piston pumps. For example, in the 71 displacement requirement, the noise needs to be lower than 75 decibels.

[0003] In the prior art, in order to reduce the impact of noise and reduce the cost increase caused by improving the structure of the cylinder, workers are usually required to wear earplugs or other covering or blocking methods to reduce noise.

[0004] However, since the noise and vibration of the pump are mainly attributed to the discharge pressure pulsation caused by the pressure change of the working fluid in the cylinder hole when the cylinder body rotates, that is, the high pressure in the discharge stroke and the low pressure in the suction stroke generate corresponding noise and vibration. In order to smooth and disperse the pressure fluctuation, it is generally achieved through the structure of the eyebrow groove of the valve plate, but this structure is difficult to effectively reduce the noise and needs to be improved. Summary of the invention

[0005] In view of this, the purpose of this application is to provide a non-uniform hydraulic piston pump cylinder to achieve the purpose of significantly reducing noise. The specific solution is as follows: A non-uniformly distributed hydraulic piston pump cylinder body, including a cylinder body for matching with an oil distribution plate, wherein the cylinder body is provided with a plurality of piston holes arranged with equal arcs, the angle between two adjacent piston holes is a, each of the piston holes is connected with a waist-shaped oil groove, and the angles between two adjacent waist-shaped oil grooves are different; wherein a is 30-45°, and the angle difference between two adjacent waist-shaped oil grooves is ±4°.

[0006] Preferably: a is 40°, and 9 plunger holes are formed on the cylinder body, wherein the angle between two plunger holes is b, b is smaller than a, and the angles between three adjacent plunger holes arranged in a clockwise direction and the plunger hole located at the boundary are c, d and e respectively; the angles between four adjacent plunger holes arranged in a counterclockwise direction and the plunger hole located at the boundary are a, f, g and h respectively; wherein c, e and g are positive integer multiples of a.

[0007] Preferably, b is 38°, c is 80°, d is 118°30', e is 160°, f is 80°30', g is 120° and h is 161°.

[0008] Preferably: a is 45°, and 8 plunger holes are formed on the cylinder body, wherein the angle between two plunger holes is b, b is smaller than a, and the angles between two adjacent plunger holes arranged in a clockwise direction and the plunger hole located at the boundary are c and d respectively; the angles between four adjacent plunger holes arranged in a counterclockwise direction and the plunger hole located at the boundary are a, e, f and g respectively; wherein c and f are positive integer multiples of a.

[0009] Preferably, b is 43°, c is 90°, d is 133°30', e is 90°30', f is 135°, and g is 181°.

[0010] Preferably: a is 30°, and 12 plunger holes are formed on the cylinder body, wherein the angle between two plunger holes is b, b is smaller than a, and the angles between the five adjacent plunger holes arranged in a clockwise direction and the plunger hole located at the boundary are c, d, e, f and g respectively; the angles between the four adjacent plunger holes arranged in a counterclockwise direction and the plunger hole located at the boundary are a, h, i, j and k respectively; wherein c, e, g, i and k are positive integer multiples of a.

[0011] Preferably, b is 29°, c is 60°, d is 89°30', e is 120°, f is 149°, g is 180°, h is 60°30', i is 90°, j is 121° and k is 150°.

[0012] Preferably, the oil distribution plate is provided with a damping hole and an eyebrow groove matching the damping hole.

[0013] Preferably: a plunger body is inserted into the plunger hole.

[0014] It can be seen from the above scheme that the present application provides a non-uniform hydraulic plunger pump cylinder body, which changes the time for each plunger hole to switch between the suction stroke and the discharge stroke by arranging the waist-shaped oil ports non-uniformly at positions matching the plunger holes, thereby achieving the effect of smoothing and dispersing pressure fluctuations and effectively reducing noise. At the same time, on the basis of 71 displacement, the noise is reduced from more than 75 decibels to less than 55 decibels, while effectively controlling the increased cost of improving the cylinder structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of this embodiment; Figure 2 It is a schematic cross-sectional structural diagram of this embodiment.

[0016] Explanation of the reference numerals: 1. cylinder body; 11. plunger hole; 12. waist-shaped oil groove; 2. oil distribution plate; 21. damping hole; 22. eyebrow groove; 3. plunger body. DETAILED DESCRIPTION

[0017] In order to make the technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application.

[0018] The non-uniformly distributed hydraulic piston pump cylinder of the present application will be described in detail below.

[0019] like Figure 1 As shown, a non-uniform hydraulic piston pump cylinder includes a cylinder 1. A plurality of piston holes 11 arranged in equal arcs are arranged on the cylinder 1. A piston body 3 is inserted into the piston hole 11, thereby sealing one end of the piston hole 11 to form a fluid path for fluid flow.

[0020] It should be noted that if Figure 1 , Figure 2 As shown, an angle a is formed between two adjacent plunger holes 11. At the same time, a waist-shaped oil groove 12 is connected to the end of each plunger hole 11 away from the plunger body 3, and the angles of two adjacent waist-shaped oil grooves 12 are different. Among them, a is 30-45°, so that 12 plunger holes 11 are formed when a is 30°, 11 plunger holes 11 are formed when a is 32.7°, 10 plunger holes 11 are formed when a is 36°, 9 plunger holes 11 are formed when a is 40°, and 8 plunger holes 11 are formed when a is 45°.

[0021] It should be mentioned that the angle difference between two adjacent waist-shaped oil grooves 12 is ±4°. The end of the cylinder body 1 away from the plug-in plunger body 3 is used to match the oil distribution plate 2 and form a channel for fluid flow, so that the time for switching between the suction stroke and the discharge stroke of the fluid between the multiple plunger holes 11 in the cylinder body 1 is effectively adjusted, and the difference formed significantly improves the smoothness and dispersion of the pressure fluctuation, thereby achieving the purpose of reducing noise.

[0022] like Figure 2 As shown, the oil distribution plate 2 is provided with a damping hole 21 and an eyebrow groove 22 matching the damping hole 21. The arrangement of the damping hole 21, the eyebrow groove 22 and the waist-shaped oil groove 12 cooperates with each other to solve the cost pressure and difficulty brought by improving the structure of the eyebrow groove 22 in the prior art, and achieve a significantly improved noise reduction effect. Example

[0023] like Figure 1As shown, a non-uniform hydraulic piston pump cylinder includes a cylinder 1. A plurality of piston holes 11 arranged in equal arcs are arranged on the cylinder 1. A piston body 3 is inserted into the piston hole 11, thereby sealing one end of the piston hole 11 to form a fluid path for fluid flow.

[0024] It should be noted that if Figure 1 , Figure 2 As shown, an angle a is formed between two adjacent plunger holes 11. In the first embodiment of the present application, a is 40°, so that 9 plunger holes 11 are formed on the cylinder body 1, wherein the angle between two plunger holes 11 is b, b is smaller than a, and the angles between the three adjacent plunger holes 11 arranged clockwise and the plunger hole 11 located at the boundary are c, d and e respectively; the angles between the four adjacent plunger holes 11 arranged counterclockwise and the plunger hole 11 located at the boundary are a, f, g and h respectively. Wherein, c, e and g are positive integer multiples of a.

[0025] In the first embodiment of the present application, b is 38°, c is 80°, d is 118°30', e is 160°, f is 80°30', g is 120° and h is 161°.

[0026] According to testing, the noise level of the first embodiment of the present application at a displacement of 71 is 49 decibels, which is 55 decibels lower than the acceptable decibel value for the human body, and has the effect of significantly improving the noise reduction performance.

[0027] like Figure 2 As shown, the end of the cylinder body 1 away from the plug-in plunger body 3 is used to match with the oil distribution plate 2 and form a channel for fluid flow, so that the time for switching between the suction stroke and the discharge stroke of the fluid between the multiple plunger holes 11 in the cylinder body 1 can be effectively adjusted, and the difference formed significantly improves the smoothness and dispersion of the pressure fluctuation, thereby achieving the purpose of reducing noise. At the same time, the oil distribution plate 2 is provided with a damping hole 21 and an eyebrow groove 22 matching the damping hole 21. The arrangement of the damping hole 21, the eyebrow groove 22 and the waist-shaped oil groove 12 cooperates with each other to solve the cost pressure and difficulty brought about by improving the structure of the eyebrow groove 22 in the prior art, and achieves the effect of significantly improving the noise reduction performance. Example

[0028] like Figure 1 As shown, a non-uniform hydraulic piston pump cylinder includes a cylinder 1. A plurality of piston holes 11 arranged in equal arcs are arranged on the cylinder 1. A piston body 3 is inserted into the piston hole 11, thereby sealing one end of the piston hole 11 to form a fluid path for fluid flow.

[0029] It should be noted that if Figure 1 , Figure 2As shown, an angle a is formed between two adjacent plunger holes 11. In the first embodiment of the present application, a is 45°, so that 8 plunger holes 11 are formed on the cylinder body 1, wherein the angle between two plunger holes 11 is b, b is smaller than a, and the angles between two adjacent plunger holes 11 arranged clockwise and the plunger hole 11 located at the boundary are c and d, respectively. The angles between four adjacent plunger holes 11 arranged counterclockwise and the plunger hole 11 located at the boundary are a, e, f and g, respectively. Among them, c and f are positive integer multiples of a.

[0030] In the second embodiment of the present application, b is 38°, c is 80°, d is 118°30', e is 160°, f is 80°30', g is 120° and h is 161°.

[0031] According to testing, the noise level of the first embodiment of the present application at a displacement of 71 is 52 decibels, which is lower than the human body's acceptable decibel value of 55 decibels, and has the effect of significantly improving the noise reduction performance.

[0032] like Figure 2 As shown, the end of the cylinder body 1 away from the plug-in plunger body 3 is used to match with the oil distribution plate 2 and form a channel for fluid flow, so that the time for switching between the suction stroke and the discharge stroke of the fluid between the multiple plunger holes 11 in the cylinder body 1 can be effectively adjusted, and the difference formed significantly improves the smoothness and dispersion of the pressure fluctuation, thereby achieving the purpose of reducing noise. At the same time, the oil distribution plate 2 is provided with a damping hole 21 and an eyebrow groove 22 matching the damping hole 21. The arrangement of the damping hole 21, the eyebrow groove 22 and the waist-shaped oil groove 12 cooperates with each other to solve the cost pressure and difficulty brought about by improving the structure of the eyebrow groove 22 in the prior art, and achieves the effect of significantly improving the noise reduction performance. Example

[0033] like Figure 1 As shown, a non-uniform hydraulic piston pump cylinder includes a cylinder 1. A plurality of piston holes 11 arranged in equal arcs are arranged on the cylinder 1. A piston body 3 is inserted into the piston hole 11, thereby sealing one end of the piston hole 11 to form a fluid path for fluid flow.

[0034] It should be noted that if Figure 1 , Figure 2 As shown, an angle a is formed between two adjacent plunger holes 11. In the first embodiment of the present application, a is 30°, so that 12 plunger holes 11 are formed on the cylinder body 1, wherein the angle between two plunger holes 11 is b, b is smaller than a, and the angles between the five adjacent plunger holes 11 arranged in a clockwise direction and the plunger hole 11 located at the boundary are c, d, e, f and g, respectively. The angles between the four adjacent plunger holes 11 arranged in a counterclockwise direction and the plunger hole 11 located at the boundary are a, h, i, j and k, respectively. Among them, c, e, g, i and k are positive integer multiples of a.

[0035] In Example 3 of the present application, b is 29°, c is 60°, d is 89°30', e is 120°, f is 149°, g is 180°, h is 60°30', i is 90°, j is 121° and k is 150°.

[0036] According to the test, the noise level of the first embodiment of the present application at a displacement of 71 is 51 decibels, which is lower than the acceptable decibel value of 55 decibels for the human body, and has the effect of significantly improving the noise reduction performance.

[0037] like Figure 2 As shown, the end of the cylinder body 1 away from the plug-in plunger body 3 is used to match with the oil distribution plate 2 and form a channel for fluid flow, so that the time for switching between the suction stroke and the discharge stroke of the fluid between the multiple plunger holes 11 in the cylinder body 1 can be effectively adjusted, and the difference formed significantly improves the smoothness and dispersion of the pressure fluctuation, thereby achieving the purpose of reducing noise. At the same time, the oil distribution plate 2 is provided with a damping hole 21 and an eyebrow groove 22 matching the damping hole 21. The arrangement of the damping hole 21, the eyebrow groove 22 and the waist-shaped oil groove 12 cooperates with each other to solve the cost pressure and difficulty brought about by improving the structure of the eyebrow groove 22 in the prior art, and achieves the effect of significantly improving the noise reduction performance.

[0038] In summary, the present application provides a non-uniform hydraulic plunger pump cylinder body, which changes the time for each plunger hole 11 to switch between the suction stroke and the discharge stroke by non-uniformly arranging the waist-shaped oil ports at positions matching the plunger holes 11, thereby achieving the effect of smoothing and dispersing pressure fluctuations and effectively reducing noise. At the same time, on the basis of 71 displacement, the noise is reduced from more than 75 decibels to less than 45 decibels, while effectively controlling the increased cost of improving the cylinder body 1 structure.

[0039] The "first", "second", "third", "fourth", etc. (if any) referred to in this application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods or devices.

[0040] It should be noted that the descriptions involving "first", "second", etc. in this application are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0041] Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea. At the same time, for those skilled in the art, according to the idea of ​​the present application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A non-uniformly distributed hydraulic piston pump cylinder, comprising a cylinder for matching with an oil distribution plate, characterized in that: The cylinder body is provided with a plurality of plunger holes arranged in equal arcs, the angle between two adjacent plunger holes is a, each plunger hole is connected with a waist-shaped oil groove, and the angles between two adjacent waist-shaped oil grooves are different; wherein a is 30-45°, and the angle difference between two adjacent waist-shaped oil grooves is ±4°.

2. The non-uniformly distributed hydraulic piston pump cylinder according to claim 1, characterized in that: The angle a is 40°, and 9 plunger holes are formed on the cylinder body, wherein the angle between two plunger holes is b, b is smaller than a, and the angles between the three adjacent plunger holes arranged in a clockwise direction and the plunger hole located at the boundary are c, d and e respectively; the angles between the four adjacent plunger holes arranged in a counterclockwise direction and the plunger hole located at the boundary are a, f, g and h respectively; wherein c, e and g are positive integer multiples of a.

3. The non-uniformly distributed hydraulic piston pump cylinder according to claim 2, characterized in that: b is 38°, c is 80°, d is 118°30', e is 160°, f is 80°30', g is 120° and h is 161°.

4. The non-uniformly distributed hydraulic piston pump cylinder according to claim 1, characterized in that: The angle a is 45°, and 8 plunger holes are formed on the cylinder body, wherein the angle between two plunger holes is b, b is smaller than a, and the angles between two adjacent plunger holes arranged in a clockwise direction and the plunger hole located at the boundary are c and d respectively; the angles between four adjacent plunger holes arranged in a counterclockwise direction and the plunger hole located at the boundary are a, e, f and g respectively; wherein c and f are positive integer multiples of a.

5. The non-uniformly distributed hydraulic piston pump cylinder according to claim 4, characterized in that: b is 43°, c is 90°, d is 133°30', e is 90°30', f is 135°, and g is 181°.

6. The non-uniformly distributed hydraulic piston pump cylinder according to claim 1, characterized in that: The angle a is 30°, and 12 plunger holes are formed on the cylinder body, wherein the angle between two plunger holes is b, b is smaller than a, and the angles between the five adjacent plunger holes arranged in a clockwise direction and the plunger hole located at the boundary are c, d, e, f and g respectively; the angles between the four adjacent plunger holes arranged in a counterclockwise direction and the plunger hole located at the boundary are a, h, i, j and k respectively; wherein c, e, g, i and k are positive integer multiples of a.

7. The non-uniformly distributed hydraulic piston pump cylinder according to claim 6, characterized in that: b is 29°, c is 60°, d is 89°30', e is 120°, f is 149°, g is 180°, h is 60°30', i is 90°, j is 121° and k is 150°.

8. The non-uniformly distributed hydraulic piston pump cylinder according to claim 1, characterized in that: The oil distribution plate is provided with a damping hole and an eyebrow groove matching the damping hole.

9. The non-uniformly distributed hydraulic piston pump cylinder according to claim 1, characterized in that: A plunger body is inserted into the plunger hole.

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