Low-pulsation plunger pump with dynamic variable flow distribution pre-compression angle

Abstract

The invention relates to the technical field of mechanical hydraulic pressure, in particular to a low-pulsation plunger pump with a dynamic variable flow distribution pre-compression angle, the low-pulsation plunger pump with the dynamic variable flow distribution pre-compression angle comprises a plunger pump, a shell and an adjusting piece, the plunger pump is fixedly connected with the shell, an oil distribution cover is fixedly connected in the shell, the oil distribution cover is rotatably connected with a flow distribution plate, and the flow distribution plate is fixedly connected with the shell. A blocking piece is fixedly connected to the surface of the valve plate, a groove is formed in the surface of the oil distribution cover, a push rod is slidably connected into the groove, the blocking piece is connected with the push rod in an inserted mode, the push rod is elastically connected with a limiting plate, the limiting plate is in threaded connection with the adjusting piece through a screw rod, and an oil return opening is formed in the groove and communicated with the interior of the shell. The valve plate has the beneficial effects that in a dynamic balance state, the elastic force of the spring and the hydraulic force are balanced in real time, so that the pre-compression angle is automatically adjusted along with the pressure of the oil discharge kidney-shaped hole, and the pressure transition process is always in an optimal state, so that the valve plate can adapt to the working condition change, and the flow pulsation is effectively inhibited and optimized.

Description

Technical Field

[0001] This invention relates to the field of mechanical hydraulic technology, specifically to a low-pulsation piston pump with a dynamically variable pre-compression angle. Background Technology

[0002] As a core power component in hydraulic systems, piston pumps are widely used in industry, transportation, energy, and other fields, and their technology is relatively mature. Currently, a mature piston pump structure mainly consists of key components such as the pump body, piston assembly, swashplate, distributor plate, and drive shaft.

[0003] A plunger pump uses the reciprocating motion of a plunger within a cylinder to periodically change the sealed volume, thus achieving oil intake and discharge. During the alternating intake and discharge process, the oil flow rate cannot remain constant due to variations in plunger speed and the structural characteristics of the distribution plate, resulting in flow pulsation.

[0004] Currently, the distributor plate in plunger pumps is typically installed by fixing it to the distributor cap with a cylindrical pin. This fixed structure prevents the distributor plate from rotating, resulting in a constant pre-compression angle during the distribution process. However, the output pressure and flow rate vary under different operating conditions, making it difficult for the fixed pre-compression angle to adapt to these changes and effectively suppress and optimize flow pulsation. Therefore, this invention proposes a low-pulsation plunger pump with a dynamically variable distribution pre-compression angle to solve the aforementioned problems. Summary of the Invention

[0005] The purpose of this invention is to provide a low-pulsation plunger pump with a dynamically variable pre-compression angle to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a low-pulsation plunger pump with a dynamically variable pre-compression angle, comprising: a plunger pump, a housing, and an adjusting component. The plunger pump is fixedly connected to the housing. An oil distributor cap is fixedly connected inside the housing. A distribution plate is rotatably connected to the oil distributor cap. A baffle is fixedly connected to the surface of the distribution plate. A groove is formed on the surface of the oil distributor cap. A push rod is slidably connected inside the groove. The baffle is inserted into the push rod. A limit plate is elastically connected to the push rod. The limit plate is threadedly connected to the adjusting component via a screw. An oil return port is formed inside the groove and communicates with the inside of the housing.

[0007] Preferably, one end of the plunger pump is connected to a prime mover, the output end of the prime mover is fixedly connected to the plunger pump, the side of the plunger pump is fixedly connected to the housing, the inner wall of the housing is fixedly connected to the side of the oil separator cap, and a fixing column is fixedly connected to the surface of the plunger pump.

[0008] Preferably, both sides of the distribution plate are provided with a lubricating coating. The lubricating coating on one side is in close contact with the plunger pump, and the lubricating coating on the other side is in close contact with the surface of the oil separator cover. The baffle is fixedly connected to the surface of the distribution plate.

[0009] Preferably, the surfaces of the distribution plate and the oil distribution cover are provided with through-holes for oil suction and oil discharge, and the two are symmetrically arranged. A through-hole is provided at the midpoint of the surface of the distribution plate, and the through-hole communicates with the interior of the housing. The oil suction and oil discharge holes are located on both sides of the through-hole.

[0010] Preferably, the distribution plate has an inner drainage hole, an outer drainage hole, and a manifold on the side near the plunger pump. One end of the manifold is connected to the outer drainage hole, and the other end of the manifold is connected to the inner drainage hole. The manifold, the inner drainage hole, and the outer drainage hole are internally connected.

[0011] Preferably, the groove extends through the oil distributor cap, a limiting groove is formed on the inner wall of the groove, one end of the groove contacts the oil return port and the two are connected, and the oil return port is connected to the oil suction waist-shaped hole on the surface of the oil distributor cap.

[0012] Preferably, the inner wall of the groove is slidably connected to the push rod, one end of the inner wall of the groove is fixedly connected to a limiting tube, and the other end of the limiting tube is fixedly connected to the oil separator cover.

[0013] Preferably, one end of the push rod has a through slot, the baffle contacts the inner wall of the slot and is inserted into the push rod, a spring is fixedly connected to one side of the push rod, the other end of the spring is fixedly connected to the limiting plate, the spring is sleeved on the surface of the limiting tube, the limiting plate is H-shaped, and the limiting plate is slidably connected to the limiting groove.

[0014] Preferably, one end of the adjusting component passes through the housing and is fixedly connected to a fixing cylinder. The inner wall of the fixing cylinder is threadedly connected to the screw. The other end of the screw is fixedly connected to the limiting plate. Both the adjusting component and the fixing cylinder are rotatably connected to the housing through an interference fit of bearings. The screw is rotatably connected to the oil distributor cover.

[0015] Preferably, the inner wall of the center hole on the surface of the oil distributor cap is fixedly connected to the fixing post, and the center hole on the surface of the distribution plate is sleeved with the fixing post.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: the preload of the spring can keep the distribution plate at the minimum pre-compression angle position. When the plunger pump is in the pressure rise stage, the increase in outlet pressure can push the push rod to overcome the spring force. At this time, the distribution plate starts to rotate and the pre-compression angle increases. In the dynamic equilibrium state, the spring force and the hydraulic pressure are balanced in real time, so that the pre-compression angle is automatically adjusted with the pressure of the oil discharge orifice, ensuring that the pressure transition process is always in the optimal state. Thus, the distribution plate can adapt to changes in working conditions, thereby effectively suppressing and optimizing the flow pulsation. Attached Figure Description

[0017] Figure 1 This is a three-dimensional schematic diagram of the overall structure of the present invention;

[0018] Figure 2 This is a cross-sectional schematic diagram of the prime mover of the present invention;

[0019] Figure 3 This is a side view of the fixing column of the present invention;

[0020] Figure 4 This is a side view of the distribution plate of the present invention;

[0021] Figure 5 This is a schematic cross-sectional view of the distribution plate of the present invention;

[0022] Figure 6 This is a cross-sectional schematic diagram of the oil separator cap of the present invention;

[0023] Figure 7 For the present invention Figure 6 Enlarged view of the structure of region A in the middle.

[0024] In the diagram: 1. Housing; 2. Distribution plate; 3. Oil distributor cap; 4. Prime mover; 5. Piston pump; 6. Fixed column; 7. Lubricating coating; 8. Oil suction slot; 9. Oil discharge slot; 10. Center hole; 11. External drain hole; 12. Manifold; 13. Internal drain hole; 14. Baffle; 15. Push rod; 16. Slot; 17. Spring; 18. Limiting groove; 19. Limiting plate; 20. Screw; 21. Fixed cylinder; 22. Adjusting component; 23. Groove; 24. Oil return port; 25. Limiting tube. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the present invention clear and complete, the embodiments of the present invention 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 the present invention, and are merely illustrative of the embodiments of the present invention. They are not intended to limit the embodiments of the present invention. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] Please see Figures 1 to 7This invention provides a technical solution: a low-pulsation plunger pump with dynamically variable pre-compression angle. The low-pulsation plunger pump includes a plunger pump 5, a housing 1, and an adjusting component 22. The plunger pump 5 drives the flow of hydraulic oil in the oil tank, and can continuously perform oil suction and pressure operations. One end of the plunger pump 5 is connected to a prime mover 4, which drives the plunger pump 5 to work. The output end of the prime mover 4 is fixedly connected to the plunger pump 5. The side of the plunger pump 5 is fixedly connected to the housing 1, and the housing 1 protects the plunger pump 5. The position of the entire component can be fixed. The inner wall of the housing 1 is fixedly connected to the side of the oil distributor cover 3. The surface of the plunger pump 5 is fixedly connected to the fixing column 6. The fixing column 6 facilitates the fixing of the distribution plate 2 and the oil distributor cover 3. Both sides of the distribution plate 2 are provided with a lubricating coating 7. The lubricating coating 7 on one side is in close contact with the plunger pump 5, and the lubricating coating 7 on the other side is in close contact with the surface of the oil distributor cover 3. The lubricating coating 7 is a lubricating substance. When the distribution plate 2 rotates, it can reduce the friction force during rotation, thereby improving the adjustment accuracy. The baffle 14 is fixedly connected to the surface of the distribution plate 2.

[0027] Connect the plunger pump 5 to the prime mover 4. When the prime mover 4 starts, the plunger pump 5 starts to work. At this time, the plunger inside the plunger pump 5 starts to work. Install the distributor plate 2 inside the oil distributor cover 3. At this time, the plunger pump 5 can draw in the oil from the oil tank. The plunger pump 5 enters the oil tank after passing through the oil distributor cover 3 and the distributor plate 2 in sequence. During the rotation of the plunger pump 5, the hydraulic oil can be pumped out from the plunger pump 5 again. At this time, the hydraulic oil passes through the distributor plate 2 and the oil distributor cover 3 in sequence and is discharged.

[0028] Both the distribution plate 2 and the oil distributor cap 3 have through-holes 8 and 9. The suction hole 8 allows hydraulic oil to be drawn in when the piston pump 5 rotates, and the discharge hole 9 allows hydraulic oil to be discharged during the rotation of the piston pump 5. The discharge hole 9 and suction hole 8 are symmetrically arranged. A through-hole 10 is located at the midpoint of the distribution plate 2's surface, communicating with the interior of the housing 1. The suction hole 8 and discharge hole 9 are located on either side of the through-hole 10, facilitating their fixation. The distribution plate 2 has a through-hole 8 on the side closest to the piston pump 5. The system includes an inner drain hole 13, an outer drain hole 11, and a manifold 12. The manifold 12 is arc-shaped, with one end connected to the outer drain hole 11 and the other end connected to the inner drain hole 13. The manifold 12, inner drain hole 13, and outer drain hole 11 are internally interconnected. The wrap angle of the manifold 12 covers the high-pressure area on the distribution plate 2. The manifold 12 is located outside the drain waist-shaped hole 9 and does not affect the static pressure support of the plunger pump 5. The manifold 12 is used to collect the oil squeezed out from the side. The outer drain hole 11 is used to connect the manifold 12, thereby sending the oil in the manifold 12 to the oil distributor cover 3.

[0029] When the plunger pump 5 rotates, hydraulic oil will flow continuously through the plunger pump 5. During the process of hydraulic oil being discharged through the drain hole 9, a small amount of hydraulic oil will enter from the outer drain hole 11. After passing through the manifold 12, it will be discharged from the inner drain hole 13 into the oil distributor cover 3, thereby cooling the surface of the distribution plate 2.

[0030] The groove 23 penetrates the oil distributor cover 3. A limiting groove 18 is formed on the inner wall of the groove 23. The groove 23 is arc-shaped. One end of the groove 23 contacts the oil return port 24 and the two are connected. The oil return port 24 facilitates the discharge of hydraulic oil in the groove 23. The oil return port 24 is connected to the oil suction waist-shaped hole 8 on the surface of the oil distributor cover 3. The inner wall of the groove 23 is slidably connected to the push rod 15. When external high-pressure hydraulic oil enters through the groove 23 and contacts the push rod 15, the push rod 15 will slide under the pressure. One end of the inner wall of the groove 23 is fixedly connected to the limiting tube 25. The other end of the limiting tube 25 passes through the push rod 15 and is connected to the oil distributor cover 3. The cover 3 is fixedly connected, and the sliding of the push rod 15 can be guided and limited by the limiting tube 25. One end of the push rod 15 has a through slot 16. The baffle 14 contacts the inner wall of the slot 16 and is inserted into the push rod 15. The slot 16 facilitates the fixing of the baffle 14. When the push rod 15 slides, it can drive the baffle 14 to rotate, thereby causing the distribution plate 2 to rotate, thus changing the pre-compression angle. A spring 17 is fixedly connected to one side of the push rod 15, and the other end of the spring 17 is fixedly connected to the limiting plate 19. The spring 17 facilitates the sliding of the push rod 15 and the back-and-forth rotation of the distribution plate 2.

[0031] When hydraulic oil is continuously discharged from the drain hole 9, the pressure on the side of the groove 23 will change accordingly. At this time, the pressure on the push rod 15 changes, thereby causing the push rod 15 to slide. The push rod 15 can drive the distribution plate 2 to rotate through the baffle 14, thereby changing the pre-compression angle.

[0032] Spring 17 is sleeved on the surface of limiting tube 25. Limiting plate 19 is H-shaped. Through the upper and lower ends of limiting plate 19, limiting plate 19 is slidably connected to limiting groove 18. Limiting groove 18 can guide and limit the sliding of limiting plate 19. One end of adjusting member 22 passes through housing 1 and is fixedly connected to fixed cylinder 21. Adjusting member 22 can drive fixed cylinder 21 to rotate. The inner wall of fixed cylinder 21 is threadedly connected to screw 20. The other end of screw 20 is fixedly connected to limiting plate 19. Next, when the fixed cylinder 21 rotates, the limiting plate 19 begins to slide along the limiting groove 18 under the action of the screw 20, thereby changing the extension range of the spring 17. The adjusting component 22 and the fixed cylinder 21 are rotatably connected to the housing 1 through the interference fit of the bearing. The screw 20 is rotatably connected to the oil distributor 3. The inner wall of the center hole 10 on the surface of the oil distributor 3 is fixedly connected to the fixed column 6. The center hole 10 on the surface of the distribution plate 2 is sleeved with the fixed column 6. At this time, the distribution plate 2 can rotate with the fixed column 6 as the axis.

[0033] When it is necessary to adjust the stiffness and pre-compression of spring 17, the adjusting component 22 can be rotated. At this time, the fixed cylinder 21 rotates, and the limiting plate 19 begins to slide along the limiting groove 18 during the rotation of screw 20.

[0034] When this device is working, in the initial state, the preload of spring 17 can keep the distribution plate 2 at the minimum pre-compression angle position. At this time, the plunger pump 5 transitions from the oil suction area to the oil pressure area. When the internal pressure of the plunger pump 5 increases, the outlet pressure begins to rise. When the high-pressure oil passes through the oil drain hole 9, the hydraulic oil pressure increases. At this time, the push rod 15 can be pushed to overcome the elastic force of spring 17. At this time, the distribution plate 2 begins to rotate, and the pre-compression angle increases. As the pressure increases, the distribution plate 2 will continue to rotate to the maximum angle. At this time, the pre-compression angle reaches the maximum value. Under dynamic equilibrium, the elastic force of spring 17 and the hydraulic pressure are balanced in real time, so that the pre-compression angle is automatically adjusted with the pressure of the oil drain hole 9, ensuring that the pressure transition process is always in the optimal state.

[0035] Although embodiments of the 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 invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A low-pulsation plunger pump with dynamically variable pre-compression angle, characterized in that: The low-pulsation plunger pump with dynamic variable distribution pre-compression angle includes: a plunger pump (5), a housing (1) and an adjusting component (22). The plunger pump (5) is fixedly connected to the housing (1). An oil distributor cover (3) is fixedly connected inside the housing (1). A distribution plate (2) is rotatably connected to the oil distributor cover (3). A baffle plate (14) is fixedly connected to the surface of the distribution plate (2). A groove (23) is opened on the surface of the oil distributor cover (3). A push rod (15) is slidably connected inside the groove (23). The baffle plate (14) is inserted into the push rod (15). The push rod (15) is elastically connected to a limiting plate (19). The limiting plate (19) is threadedly connected to the adjusting component (22) through a screw (20). An oil return port (24) is opened inside the groove (23). The oil return port (24) is connected to the housing (1).

2. The low-pulsation plunger pump with dynamic variable flow distribution and pre-compression angle according to claim 1, characterized in that: One end of the plunger pump (5) is connected to the prime mover (4), the output end of the prime mover (4) is fixedly connected to the plunger pump (5), the side of the plunger pump (5) is fixedly connected to the housing (1), the inner wall of the housing (1) is fixedly connected to the side of the oil separator cover (3), and a fixing column (6) is fixedly connected to the surface of the plunger pump (5).

3. The low-pulsation plunger pump with dynamic variable flow distribution and pre-compression angle according to claim 1, characterized in that: Both sides of the distribution plate (2) are provided with a lubricating coating (7). The lubricating coating (7) on one side is in close contact with the plunger pump (5), and the lubricating coating (7) on the other side is in close contact with the surface of the oil separator cover (3). The baffle (14) is fixedly connected to the surface of the distribution plate (2).

4. The low-pulsation plunger pump with dynamic variable flow distribution and pre-compression angle according to claim 1, characterized in that: The distribution plate (2) and the oil distribution cover (3) are both provided with through oil suction waist-shaped holes (8) and oil discharge waist-shaped holes (9) on their surfaces, and the two are arranged symmetrically. A through central hole (10) is provided at the midpoint of the surface of the distribution plate (2). The central hole (10) communicates with the interior of the shell (1). The oil suction waist-shaped holes (8) and oil discharge waist-shaped holes (9) are located on both sides of the central hole (10).

5. A low-pulsation plunger pump with dynamically variable pre-compression angle according to claim 1, characterized in that: The distribution plate (2) has an inner drainage hole (13), an outer drainage hole (11) and a manifold (12) on the side near the plunger pump (5). One end of the manifold (12) is connected to the outer drainage hole (11), and the other end of the manifold (12) is connected to the inner drainage hole (13). The manifold (12), the inner drainage hole (13) and the outer drainage hole (11) are internally connected.

6. A low-pulsation plunger pump with dynamically variable pre-compression angle according to claim 1, characterized in that: The groove (23) penetrates the oil distribution cover (3), and a limiting groove (18) is provided on the inner wall of the groove (23). One end of the groove (23) contacts the oil return port (24) and the two are connected. The oil return port (24) is connected to the oil suction waist-shaped hole (8) on the surface of the oil distribution cover (3).

7. A low-pulsation plunger pump with dynamically variable pre-compression angle according to claim 1, characterized in that: The inner wall of the groove (23) is slidably connected to the push rod (15), and a limit tube (25) is fixedly connected to one end of the inner wall of the groove (23), and the other end of the limit tube (25) is fixedly connected to the oil separator cover (3).

8. A low-pulsation plunger pump with dynamically variable pre-compression angle according to claim 1, characterized in that: One end of the push rod (15) has a through slot (16), the baffle (14) contacts the inner wall of the slot (16) and the baffle (14) is inserted into the push rod (15), a spring (17) is fixedly connected to one side of the push rod (15), the other end of the spring (17) is fixedly connected to the limiting plate (19), the spring (17) is sleeved on the surface of the limiting tube (25), the limiting plate (19) is H-shaped, and the limiting plate (19) is slidably connected to the limiting groove (18).

9. A low-pulsation plunger pump with dynamically variable pre-compression angle according to claim 1, characterized in that: One end of the adjusting component (22) passes through the housing (1) and is fixedly connected to the fixing cylinder (21). The inner wall of the fixing cylinder (21) is threadedly connected to the screw (20). The other end of the screw (20) is fixedly connected to the limiting plate (19). The adjusting component (22) and the fixing cylinder (21) are rotatably connected to the housing (1) through the interference fit of the bearing. The screw (20) is rotatably connected to the oil separator cover (3).

10. A low-pulsation plunger pump with dynamically variable pre-compression angle according to claim 1, characterized in that: The inner wall of the center hole (10) on the surface of the oil distributor cap (3) is fixedly connected to the fixing post (6), and the center hole (10) on the surface of the distribution plate (2) is sleeved with the fixing post (6).

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