High-precision ultrahigh-pressure two-way variable radial plunger pump

Abstract

The invention relates to the technical field of radial plunger pumps, and discloses a high-precision ultrahigh-pressure two-way variable radial plunger pump which comprises a plunger pump shell and a driving shaft rotationally arranged in the plunger pump shell, and a plurality of plungers are arranged on the side portion of the plunger pump shell in a sliding and penetrating mode. An adjusting and discharging mechanism used for driving the plungers to move is arranged between the plunger pump shells and the driving shaft, an air inlet bin and a heat dissipation bin are fixedly arranged at the positions, located at the two ends of the driving shaft, of the outer walls of the plunger pump shells correspondingly, and piston cylinders are fixedly arranged at the bottoms of the inner walls of the air inlet bin and the heat dissipation bin correspondingly. The outer walls of the two piston cylinders are provided with a first air inlet pipe, a first air outlet pipe, a second air inlet pipe and a second air outlet pipe in a communicating mode correspondingly, and the first air inlet pipe and the second air outlet pipe penetrate out of the air inlet bin and the heat dissipation bin correspondingly and extend to the outside. According to the high-precision ultrahigh-pressure two-way variable radial plunger pump, the moving distance of the multiple plungers can be adjusted according to the using environment and using requirements of the plunger pump, and therefore precise displacement adjustment is completed.

Description

Technical Field

[0001] This invention relates to the field of radial piston pump technology, specifically a high-precision, ultra-high-pressure bidirectional variable radial piston pump. Background Technology

[0002] A radial piston pump is a type of hydraulic pump whose core feature is that the pistons are arranged radially. During operation, the radially distributed pistons are usually driven to reciprocate within the cylinder by structures such as eccentric wheels, cams, or eccentric rings. Oil suction and discharge are achieved by utilizing the change in the sealed volume formed by the pistons and the cylinder.

[0003] However, traditional radial piston pumps currently have certain drawbacks in use: First, under low-speed conditions, traditional radial piston pumps are prone to a sharp drop in volumetric efficiency due to increased leakage between the piston and cylinder and aggravated pressure fluctuations, making it difficult to meet the flow stability requirements of precision control systems. At the same time, existing variable displacement pumps mostly use proportional valves or servo motors to drive the variable displacement mechanism, which has problems of adjustment lag and insufficient accuracy. Furthermore, under ultra-high pressure conditions, the sealing structure is prone to failure due to stress concentration, and the material strength of key components such as pistons and cylinders is also difficult to match the high pressure requirements, resulting in increased leakage and poor volumetric efficiency stability. In addition, when operating under ultra-high pressure, the plunger pump generates a large amount of heat due to liquid shearing, component friction and pressure loss. Under low-speed conditions, the efficiency of the traditional heat dissipation method that relies on its own oil circulation decreases significantly, causing the pump temperature to rise rapidly. Excessive temperature will not only aggravate the oxidation and deterioration of the oil, reduce its viscosity and lubrication performance, but also cause changes in the fit clearance of metal components such as plungers and cylinders due to thermal expansion, further increasing leakage.

[0004] Therefore, we propose a high-precision, ultra-high pressure bidirectional variable radial piston pump to solve the above problems. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a high-precision, ultra-high pressure, bidirectional variable radial piston pump. This pump features the ability to drive a stepper motor to adjust the rotation range of an eccentric ring, thereby adjusting the piston's movement distance and achieving precise displacement control. Simultaneously, it provides effective active air intake and heat dissipation within the piston pump, improving heat dissipation and ensuring stable operation of internal components. This solves the problems of existing piston pumps where the fixed piston movement distance prevents precise stepless displacement adjustment, and where heat dissipation through internal and external casing materials is ineffective.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a high-precision ultra-high pressure bidirectional variable radial plunger pump, comprising a plunger pump housing and a drive shaft rotatably disposed inside the plunger pump housing, wherein a plurality of plungers are slidably disposed on the side of the plunger pump housing, and an adjustment and discharge mechanism for driving the plurality of plungers to move is provided between the plurality of plunger pump housings and the drive shaft. An air intake chamber and a heat dissipation chamber are fixedly provided on the outer wall of the plunger pump housing at both ends of the drive shaft. A piston cylinder is fixedly provided at the bottom of the inner wall of the air intake chamber and the heat dissipation chamber. A first air intake pipe, a first air outlet pipe, a second air intake pipe, and a second air outlet pipe are respectively connected to the outer wall of the two piston cylinders. The first air intake pipe and the second air outlet pipe pass through the air intake chamber and the heat dissipation chamber and extend to the outside. The ports of the first air outlet pipe and the second air intake pipe both pass into the interior of the plunger pump housing. An air intake and ventilation mechanism is provided between the piston rod portion of the two piston cylinders and the shaft wall of the drive shaft for driving the two piston cylinders to reciprocate pumping and discharging.

[0007] Preferably, the regulating discharge mechanism includes a rotating wheel, which is located inside the plunger pump housing and is fixedly sleeved with the shaft wall of the drive shaft. The outer wall of the rotating wheel is provided with a stepless adjustment mechanism, and a connecting shaft is provided through the stepless adjustment mechanism. Multiple push plates are rotatably sleeved on the outer wall of the connecting shaft, and the ends of the multiple push plates are rotatably connected to a support shaft, which is fixedly connected to the end of the plunger.

[0008] Preferably, the multiple push plates are stacked.

[0009] Preferably, the stepless adjustment mechanism includes a motor, the rotating wheel has an adjustment groove inside, the inner wall of the adjustment groove is rotatably provided with a drive screw, the drive screw has a slider threadedly fitted on its wall, the slider is in contact with the inner wall of the adjustment groove, the connecting shaft is fixedly connected to the slider, and the motor is fixedly disposed in the adjustment groove and fixedly connected to the drive screw.

[0010] Preferably, the motor is a waterproof DC motor.

[0011] Preferably, the air intake and ventilation mechanism includes a worm and a worm wheel. The worm is rotatably disposed on the side of the air intake chamber and the heat dissipation chamber. The worm wheel is fixedly sleeved with the drive shaft and cooperates with the worm. A rotating rod is rotatably disposed on the inner wall of both the air intake chamber and the heat dissipation chamber. A rotating plate is fixedly sleeved on the rod wall of the rotating rod. A push rod is fixedly inserted inside the rotating plate. A movable plate is contacted on the back side of the rotating plate. A movable groove is formed inside the movable plate. The push rod slides within the movable groove. A connecting plate is fixedly disposed at the lower end of the side wall of the movable plate. The connecting plate is fixedly sleeved with the piston rod of the piston cylinder. A guide telescopic rod is fixedly disposed between the movable plate and the bottom of the inner wall of the air intake chamber. A bevel gear is fixedly sleeved at one end of both the worm and the rotating rod, and the two bevel gears cooperate. Preferably, both ends of the worm are rotatably engaged with the sides of the air intake chamber and the heat dissipation chamber via sealed bearings.

[0012] Preferably, the walls of the first air inlet pipe, the second air inlet pipe, the first air outlet pipe, and the second air outlet pipe are all fixedly fitted with one-way gas valves.

[0013] Preferably, a dust filter screen is fixedly provided at the inlet of the first air intake pipe.

[0014] Compared with the prior art, the present invention provides a high-precision, ultra-high pressure bidirectional variable radial piston pump, which has the following beneficial effects: 1. This high-precision, ultra-high pressure bidirectional variable radial piston pump, through its piston pump housing, pistons, drive shaft, regulating discharge mechanism, and stepless adjustment mechanism, can adjust the movement distance of multiple pistons according to the operating environment and requirements of the piston pump, thereby achieving precise displacement adjustment.

[0015] 2. This high-precision, ultra-high pressure bidirectional variable radial piston pump, through its piston pump housing, air inlet chamber, heat dissipation chamber, and air exchange mechanism, can allow cold air to enter the piston pump housing through external active air exchange to complete gas exchange, ensuring that the heat inside the piston pump can be quickly and stably handled, and minimizing the risk of overheating of the internal components of the piston pump and reducing operational stability. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of a high-precision, ultra-high pressure, bidirectional variable radial piston pump proposed in this invention. Figure 2 This is a side view of the plunger pump in this invention; Figure 3 for Figure 1 A schematic diagram of the central drive shaft and the regulating emission mechanism; Figure 4 for Figure 3 Schematic diagram of the rotating wheel; Figure 5 for Figure 2Enlarged view of the structure of part A in the middle.

[0017] In the diagram: 1. Plunger pump housing; 2. Drive shaft; 3. Plunger; 4. Inlet chamber; 5. Heat dissipation chamber; 6. Piston cylinder; 7. First inlet pipe; 8. First outlet pipe; 9. Second inlet pipe; 10. Second outlet pipe; 11. Rotating wheel; 12. Connecting shaft; 13. Push plate; 14. Support shaft; 15. Motor; 16. Adjustment groove; 17. Drive screw; 18. Worm gear; 19. Worm wheel; 20. Rotating rod; 21. Rotating plate; 22. Push rod; 23. Moving plate; 24. Connecting plate; 25. Guide telescopic rod; 26. Bevel gear; 27. Gas check valve; 28. Dust filter; 29. ​​Slider. Detailed Implementation

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0019] Please see Figure 1-5 A high-precision, ultra-high pressure, bidirectional variable radial piston pump includes a piston pump housing 1 and a drive shaft 2 rotatably disposed inside the piston pump housing 1. Multiple pistons 3 are slidably disposed on the side of the piston pump housing 1. An adjusting and discharging mechanism for driving the multiple pistons 3 is provided between the multiple piston pump housing 1 and the drive shaft 2. The adjusting and discharging mechanism includes a rotating wheel 11, which is disposed inside the piston pump housing 1 and fixedly sleeved with the shaft wall of the drive shaft 2. A stepless adjustment mechanism is provided on the outer wall of the rotating wheel 11, and a connecting shaft 12 is provided through the stepless adjustment mechanism. Multiple pistons 3 are rotatably sleeved on the outer wall of the connecting shaft 12. Multiple push plates 13 are stacked and arranged. Each end of the push plates 13 is rotatably connected to a support shaft 14. The support shaft 14 is fixedly connected to the end of the plunger 3. The stepless adjustment mechanism includes a motor 15, which is a waterproof DC motor. An adjustment groove 16 is opened inside the rotating wheel 11. A drive screw 17 is rotatably provided on the inner wall of the adjustment groove 16. A slider 29 is threaded on the rod wall of the drive screw 17. The slider 29 contacts and engages with the inner wall of the adjustment groove 16. A connecting shaft 12 is fixedly connected to the slider 29. The motor 15 is fixedly installed in the adjustment groove 16 and fixedly connected to the drive screw 17.

[0020] An air intake chamber 4 and a heat dissipation chamber 5 are fixedly installed on the outer wall of the plunger pump housing 1 at both ends of the drive shaft 2. Piston cylinders 6 are fixedly installed at the bottom of the inner walls of both the air intake chamber 4 and the heat dissipation chamber 5. A first air intake pipe 7, a first air outlet pipe 8, a second air intake pipe 9, and a second air outlet pipe 10 are respectively connected to the outer walls of the two piston cylinders 6. The first air intake pipe 7 and the second air outlet pipe 10 pass through the air intake chamber 4 and the heat dissipation chamber 5 and extend to the outside. A dust filter screen 28 is fixedly installed at the opening of the first air intake pipe 7. The ports of the first air outlet pipe 8 and the second air intake pipe 9 both penetrate into the interior of the plunger pump housing 1. An air intake and ventilation mechanism for driving the two piston cylinders 6 to reciprocate between the piston rod portion of the two piston cylinders 6 and the shaft wall of the drive shaft 2 is provided. The air intake and ventilation mechanism includes a worm gear 18 and a worm wheel 19. The worm gear 18 is rotatably located on the side of the air intake chamber 4 and the heat dissipation chamber 5. Both ends of the worm gear 18 are connected to the air intake chamber 4 and the heat dissipation chamber 5 via sealed bearings. The side of the heat dissipation chamber 5 is rotated and fitted. The worm gear 19 is fixedly sleeved with the drive shaft 2 and is configured to cooperate with the worm 18. The inner walls of the air intake chamber 4 and the heat dissipation chamber 5 are both rotatably equipped with rotating rods 20. The rod wall of the rotating rod 20 is fixedly sleeved with a rotating plate 21. A push rod 22 is fixedly inserted inside the rotating plate 21. The back side of the rotating plate 21 is in contact with a moving plate 23. The moving plate 23 has a moving groove inside. The push rod 22 is slidably disposed in the moving groove. The lower end of the side wall of the moving plate 23 is fixedly equipped with a connecting plate 24. The connecting plate 24 is fixedly sleeved with the piston rod of the piston cylinder 6. A guide telescopic rod 25 is fixedly installed between the moving plate 23 and the bottom of the inner wall of the air intake chamber 4. The worm 18 and the rotating rod 20 are both fixedly sleeved with bevel gears 26. The two bevel gears 26 are configured to cooperate. The walls of the first air intake pipe 7, the second air intake pipe 9, the first air outlet pipe 8 and the second air outlet pipe 10 are all fixedly sleeved with gas one-way valves 27.

[0021] In summary, when this high-precision ultra-high pressure bidirectional variable radial piston pump is in use, the drive shaft 2 rotates and drives the rotating wheel 11 to rotate synchronously. The rotating wheel 11 pushes the piston 3 to reciprocate within the piston pump housing 1 through the push plate 13 and the support shaft 14. The oil suction and discharge are achieved by utilizing the change in the sealed volume formed by the piston 3 and the piston pump housing 1. When it is necessary to adjust the displacement, the motor 15 in the stepless adjustment mechanism drives the drive screw 17 to rotate, causing the slider 29 to slide in the adjustment groove 16, which drives the connecting shaft 12 to change its position. The change in the position of the connecting shaft 12 causes the push plate 13 to push the plunger 3 to change its stroke, thereby achieving precise adjustment of the displacement. Simultaneously, when the drive shaft 2 rotates, it drives the worm wheel 19 to rotate. The worm wheel 19 meshes with the worm 18, causing the worm 18 to rotate. The worm 18 drives the rotating rod 20 to rotate through the bevel gear 26. The rotating plate 21 on the rotating rod 20 rotates accordingly. The push rod 22 on the rotating plate 21 slides in the moving groove of the moving plate 23, pushing the moving plate 23 to move up and down. The moving plate 23 drives the piston rod of the piston cylinder 6 to reciprocate through the connecting plate 24. When the piston cylinder 6 in the air intake chamber 4 reciprocates, it draws in external air through the first air intake pipe 7 and sends it into the plunger pump housing 1 through the first air outlet pipe 8. The piston cylinder 6 in the heat dissipation chamber 5 draws in hot air from the plunger pump housing 1 through the second air intake pipe 9 and then discharges it through the second air outlet pipe 10, realizing active ventilation and heat dissipation. The gas one-way valve 27 ensures unidirectional gas flow, while the dust filter 28 prevents impurities from being drawn in. The guide telescopic rod 25 ensures the stable movement of the moving plate 23. This completes the stable operation of the plunger pump.

[0022] It should be noted that the term "comprises" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article, or apparatus that includes a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprises a ..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0023] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A high-precision, ultra-high pressure, bidirectional variable radial piston pump, comprising a piston pump housing (1) and a drive shaft (2) rotatably disposed inside the piston pump housing (1), characterized in that: Multiple plungers (3) are slidably passed through the side of the plunger pump housing (1), and an adjustment and discharge mechanism for driving the multiple plungers (3) to move is provided between the multiple plunger pump housings (1) and the drive shaft (2). The outer wall of the plunger pump housing (1) and the two ends of the drive shaft (2) are respectively provided with an air inlet chamber (4) and a heat dissipation chamber (5). The bottom of the inner wall of the air inlet chamber (4) and the heat dissipation chamber (5) are respectively provided with a piston cylinder (6). The outer walls of the two piston cylinders (6) are respectively connected to a first air inlet pipe (7), a first air outlet pipe (8), a second air inlet pipe (9), and a second air outlet pipe (10). The first air inlet pipe (7) and the second air outlet pipe (10) pass through the air inlet chamber (4) and the heat dissipation chamber (5) and extend to the outside. The ports of the first air outlet pipe (8) and the second air inlet pipe (9) both pass into the interior of the plunger pump housing (1). An air intake and ventilation mechanism is provided between the piston rod portion of the two piston cylinders (6) and the shaft wall of the drive shaft (2) for driving the two piston cylinders (6) to reciprocate pumping and discharging.

2. The high-precision, ultra-high pressure, bidirectional variable radial piston pump according to claim 1, characterized in that: The regulating discharge mechanism includes a rotating wheel (11), which is located inside the plunger pump housing (1) and is fixedly sleeved with the shaft wall of the drive shaft (2). The outer wall of the rotating wheel (11) is provided with a stepless adjustment mechanism, and a connecting shaft (12) is provided through the stepless adjustment mechanism. Multiple push plates (13) are rotatably sleeved on the outer wall of the connecting shaft (12). The ends of the multiple push plates (13) are rotatably passed through a support shaft (14), and the support shaft (14) is fixedly connected to the end of the plunger (3).

3. A high-precision, ultra-high pressure, bidirectional variable radial piston pump according to claim 2, characterized in that: Multiple push plates (13) are stacked.

4. A high-precision, ultra-high pressure, bidirectional variable radial piston pump according to claim 2, characterized in that: The stepless adjustment mechanism includes a motor (15), an adjustment groove (16) is provided inside the rotating wheel (11), a drive screw (17) is rotatably provided on the inner wall of the adjustment groove (16), a slider (29) is threaded on the rod wall of the drive screw (17), the slider (29) is in contact with the inner wall of the adjustment groove (16), the connecting shaft (12) is fixedly connected to the slider (29), and the motor (15) is fixedly installed in the adjustment groove (16) and fixedly connected to the drive screw (17).

5. A high-precision, ultra-high pressure, bidirectional variable radial piston pump according to claim 4, characterized in that: The motor (15) is a waterproof DC motor.

6. A high-precision, ultra-high pressure, bidirectional variable radial piston pump according to claim 1, characterized in that: The air intake and ventilation mechanism includes a worm (18) and a worm wheel (19). The worm (18) is rotatably disposed on the side of the air intake chamber (4) and the heat dissipation chamber (5). The worm wheel (19) is fixedly sleeved with the drive shaft (2) and cooperates with the worm (18). The inner walls of the air intake chamber (4) and the heat dissipation chamber (5) are rotatably provided with rotating rods (20). The rod wall of the rotating rod (20) is fixedly sleeved with a rotating plate (21). A push rod (22) is fixedly inserted inside the rotating plate (21). A movable plate is contacted on the back side of the rotating plate (21). (23) The moving plate (23) has a moving groove inside. The push rod (22) is slidably disposed in the moving groove. A connecting plate (24) is fixedly disposed at the lower end of the side wall of the moving plate (23). The connecting plate (24) is fixedly sleeved with the piston rod of the piston cylinder (6). A guide telescopic rod (25) is fixedly disposed between the moving plate (23) and the bottom of the inner wall of the air inlet (4). A bevel gear (26) is fixedly sleeved at one end of the worm (18) and the rotating rod (20). The two bevel gears (26) are configured to cooperate.

7. A high-precision, ultra-high pressure, bidirectional variable radial piston pump according to claim 6, characterized in that: Both ends of the worm (18) are rotatably connected to the sides of the air intake chamber (4) and the heat dissipation chamber (5) through sealed bearings.

8. A high-precision, ultra-high pressure, bidirectional variable radial piston pump according to claim 1, characterized in that: The walls of the first air inlet pipe (7), the second air inlet pipe (9), the first air outlet pipe (8), and the second air outlet pipe (10) are all fixedly fitted with gas one-way valves (27).

9. A high-precision, ultra-high pressure, bidirectional variable radial piston pump according to claim 1, characterized in that: The inlet of the first air inlet pipe (7) is fixedly equipped with a dust filter (28).

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