Energy-saving high-pressure hydraulic pump device and use method for ultra-high pressure fluid conditions

Abstract

An energy-saving high-pressure hydraulic pump device and a method of use for ultra-high pressure fluid conditions. The internal cavity of the device is cylindrical, and the cavity is divided into a pump cylinder and a drive cylinder by a transversely moving piston. The pump cylinder on one side is arranged with a pump outlet and a liquid inlet, and the drive cylinder on the other side is arranged with a high-pressure liquid inlet and a liquid discharge port. The pump outlet and the high-pressure liquid inlet are connected to the external ultra-high pressure fluid, and are opened and closed at the same time. The piston movement is driven by the motor and the high-pressure liquid in the drive cylinder to effectively reduce the required motor input power. The piston is connected to a cylindrical slide that fits tightly to the wall of the hydraulic pump cavity. The piston and the cylindrical slide rotate while reciprocating. By slotting the slide, the pump outlet and the high-pressure liquid inlet are connected and closed with the external high-pressure fluid, and the liquid inlet and the liquid discharge port are opened and closed. The present invention can reduce the energy consumption of the hydraulic pump, safely dispose of the discharge of ultra-high pressure fluid, and is of great significance to the effective recovery and reuse of energy.

Description

Technical Field

[0001] The present invention belongs to the technical field of fluid hydraulic pumps, and particularly relates to a low-energy high-pressure hydraulic pump technology and device for an external ultra-high-pressure fluid environment. Background Art

[0002] In practical applications such as environmental engineering, chemical engineering, and biomedical engineering, fluid transportation problems under ultra-high-pressure fluids (fluid pressures of 100 to 1000 atmospheres) are often encountered. In the process of driving fluid transportation, high-pressure pump technology plays a very crucial role. Currently, most high-pressure hydraulic pumps are plunger-type hydraulic pumps, which use high-power motors to drive the movement of the plunger and change the volume of the plunger rod to suck and press the liquid. It not only consumes a huge amount of energy, but also has potential problems such as sealing and safety in the pump body structure. The maximum outlet pressure of the pumped liquid is also limited by the maximum power of the motor. On the other hand, the discharge of ultra-high-pressure fluids mostly involves reducing the pressure and discharging it to the external environment, which not only wastes the fluid energy and ignores the recovery and utilization of energy, but also poses important safety problems during the pressure reduction process. To address the above problems, there is an urgent need for a high-pressure hydraulic pump technology and device that can recover and reuse fluid energy and is low-energy and high-efficiency under ultra-high-pressure fluid transportation conditions. Summary of the Invention

[0003] To solve the above technical problems, the present invention provides a low-energy hydraulic pump technology and device for ultra-high-pressure fluid conditions. By adding a drive cylinder to recover the energy of the high-energy fluid discharged during ultra-high-pressure fluid transportation and enabling it to drive the piston movement together with the motor, the energy consumption of the hydraulic pump is significantly reduced. At the same time, the problem of ultra-high-pressure fluid leakage is solved, and the safety of the high-pressure hydraulic pump is significantly improved.

[0004] This device realizes the above technical objectives through the following technical solutions.

[0005] For an energy-saving high-pressure hydraulic pump device under ultra-high-pressure fluid conditions, it includes a liquid pumping cylinder 1, a drive cylinder 2, a pump outlet 3 of the liquid pumping cylinder, a liquid inlet 4 of the liquid pumping cylinder, a high-pressure liquid inlet 5 of the drive cylinder, a liquid discharge port 6 of the drive cylinder, a hydraulic pump housing 7, a piston 8, a cylindrical sliding vane 9, a piston shaft rod 10, a crank and connecting rod mechanism 11, a two-axis omnidirectional hinge 12, a connecting shaft 13, bearings 14, a servo motor 15, a small gear 16, and a large gear 17;

[0006] The cylindrical sliding vane 9 is fixedly connected to the piston 8, and slots are arranged on the cylindrical sliding vane 9; the pump outlet 3 of the liquid pumping cylinder and the high-pressure liquid inlet 5 of the drive cylinder are connected to the external ultra-high-pressure fluid and are respectively opened and closed through a pump-out slot 3-a and a high-pressure liquid slot 5-a on the cylindrical sliding vane 9; the liquid inlet 4 of the liquid pumping cylinder is connected to the supply water and is opened and closed through an inlet slot 4-a on the cylindrical sliding vane 9; the liquid discharge port 6 of the drive cylinder is opened and closed through a liquid discharge slot 6-a;

[0007] The reciprocating motion of the piston is jointly driven by the servo motor 15 and the high-pressure fluid in the drive cylinder. One end of the crank connecting rod mechanism 11 is fixed, and the other end is hinged to the connecting shaft 13 through a two-axis omnidirectional hinge 12. The connecting shaft 13 is connected to the piston shaft rod 10 through a bearing 14. A large gear 17 is fixed on the piston shaft rod 10, and the large gear 17 meshes with a small gear 16. By driving the small gear 16 and the large gear 17 with the servo motor 15, the rotational motion of the piston shaft rod 10, the piston 8, and the cylindrical slide vane 9 is realized.

[0008] Furthermore, the cylindrical slide vane 9 is closely attached to the inner wall of the hydraulic pump cavity and simultaneously performs reciprocating motion and rotational motion along the axial direction of the piston. Through the periodic docking of the pump outlet 3 of the pump cylinder with the pump-out groove 3-a, the high-pressure liquid inlet 5 of the drive cylinder with the high-pressure liquid groove 5-a, the liquid inlet 4 of the pump cylinder with the liquid inlet groove 4-a, and the liquid discharge port 6 of the drive cylinder with the liquid discharge groove 6-a, the opening and closing of each fluid inlet and outlet are realized.

[0009] Furthermore, the pump-out groove 3-a and the high-pressure liquid groove 5-a on the cylindrical slide vane 9 are arranged along the axial direction of the cylindrical slide vane 9, and the liquid inlet groove 4-a and the liquid discharge groove 6-a are also arranged along the axial direction of the cylindrical slide vane 9; while the pump-out groove 3-a and the liquid inlet groove 4-a, as well as the high-pressure liquid groove 5-a and the liquid discharge groove 6-a, are respectively arranged periodically along the circumferential direction of the cylindrical slide vane 9.

[0010] Furthermore, every time the piston 8 reciprocates once, each groove on the cylindrical slide vane 9 alternates periodically, realizing one opening and closing process of each fluid inlet and outlet.

[0011] For the above-mentioned usage method of the energy-saving high-pressure hydraulic pump device under ultra-high pressure fluid conditions, the outside of the pump outlet 3 of the pump cylinder and the high-pressure liquid inlet 5 of the drive cylinder is ultra-high pressure fluid; during the process of pumping out liquid, the piston 8 moves towards the pump outlet direction, and at the same time, the pump-out groove 3-a and the high-pressure liquid groove 5-a on the cylindrical slide vane 9 are respectively communicated with the pump outlet 3 of the pump cylinder and the high-pressure liquid inlet 5 of the drive cylinder, and the pump outlet 3 of the pump cylinder and the high-pressure liquid inlet 5 of the drive cylinder are opened, so that the high-pressure fluid in the drive cylinder pushes the piston 8 to move; during this process, the liquid inlet 4 of the pump cylinder and the liquid discharge port 6 of the drive cylinder are closed through the cylindrical slide vane 9; during the process of supplying liquid to and discharging liquid from the pump body, the piston 8 is driven by the servo motor 15 to move towards the liquid discharge port 6 of the drive cylinder, and at the same time, the liquid inlet groove 4-a and the liquid discharge groove 6-a on the cylindrical slide vane 9 are respectively communicated with the liquid inlet 4 of the pump cylinder and the liquid discharge port 6 of the drive cylinder, and the liquid inlet 4 of the pump cylinder and the liquid discharge port 6 of the drive cylinder are opened, realizing the supply of fluid to the hydraulic pump and the discharge of the liquid in the pump. At this time, both the pump outlet 3 of the pump cylinder and the high-pressure liquid inlet 5 of the drive cylinder are closed through the cylindrical slide vane 9.

[0012] The beneficial effects of the present invention are as follows: The present invention introduces external ultra-high pressure fluid into the pump body through the driving cylinder, which drives the piston to move during the pumping process, realizing the effective recovery and utilization of the energy of high-pressure fluid and greatly reducing the energy consumption of the motor to drive the piston movement. It solves the problem of flow leakage and pressure reduction in the transportation of ultra-high pressure fluid. Through the work done by the high-pressure fluid on the piston in the driving cylinder, the energy of the discharged fluid is greatly reduced and the fluid pressure is reduced, improving the safety of the hydraulic pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 FIG. 1 is a schematic structural diagram of a low-energy consumption hydraulic pump device according to the present invention under ultra-high pressure fluid conditions.

[0014] FIG. 2(a) is a front view of the piston and the sliding vane, and FIG. 2(b) is a cross-sectional view of the piston and the sliding vane.

[0015] Figure 3 FIG. 3 is a schematic diagram of the gear system meshing on the rotating piston shaft.

[0016] Figure 4 FIG. 4 is a cross-sectional view of the connection shaft and the bearing structure.

[0017] Figure 5 FIG. 5 is a schematic diagram of a two-axis omnidirectional hinge.

[0018] In the figures: 1 pumping cylinder, 2 driving cylinder, 3 pump outlet of the pumping cylinder, 4 liquid inlet of the pumping cylinder, 5 high-pressure liquid inlet of the driving cylinder, 6 liquid discharge port of the driving cylinder, 7 hydraulic pump housing, 8 piston, 9 cylindrical sliding vane, 10 piston shaft, 11 crank connecting rod mechanism, 12 two-axis omnidirectional hinge, 13 connecting shaft, 14 bearing, 15 servo motor, 16 pinion, 17 large gear, 3-a pump-out groove, 4-a liquid inlet groove, 5-a high-pressure liquid groove, 6-a liquid discharge groove. DETAILED DESCRIPTION OF THE INVENTION

[0019] The present invention will be further described in detail below with reference to the accompanying drawings.

[0020] As Figure 1 shown, the low-energy consumption hydraulic pump device under ultra-high pressure fluid conditions includes a pumping cylinder 1, a driving cylinder 2, a pump outlet 3 of the pumping cylinder, a liquid inlet 4 of the pumping cylinder, a high-pressure liquid inlet 5 of the driving cylinder, a liquid discharge port 6 of the driving cylinder, a hydraulic pump housing 7, a piston 8, a cylindrical sliding vane 9, a piston shaft 10, a crank connecting rod mechanism 11, a two-axis omnidirectional hinge 12, a connecting shaft 13, a bearing 14, a servo motor 15, a pinion 16 and a large gear 17.

[0021] The cavity is divided into two hydraulic cylinders, namely the liquid pumping cylinder and the driving cylinder, by a horizontally moving piston; the cylindrical sliding vane 9 is connected to the piston 8, and the pumping groove 3-a, the high-pressure liquid groove 5-a, the liquid inlet groove 4-a and the liquid discharge groove 6-a are arranged periodically and alternately along the circumference on the cylindrical sliding vane 9. When they are respectively connected to the pump outlet 3, the high-pressure liquid inlet 5, the liquid inlet 4 and the liquid discharge port 6, the respective fluid ports are opened. Taking the example of arranging two groups of grooves along the circumference of the cylindrical sliding vane 9, as shown in FIGS. 2(a) and 2(b), during the process of pumping out liquid, the piston 8 moves towards the pump outlet direction, and the pumping groove 3-a and the high-pressure liquid groove 5-a on the cylindrical sliding vane 9 are respectively connected to the pump outlet 3 and the high-pressure liquid inlet 5, so that the pump outlet 3 and the high-pressure liquid inlet 5 are opened, realizing the driving of the high-pressure fluid in the driving cylinder on the piston 8 and the pumping of water by the hydraulic pump. During this process, the liquid inlet 4 and the liquid discharge port 6 are closed.

[0022] When the cylindrical sliding vane 9 rotates by an angle of π / 2, the piston 8 is driven by the servo motor 15 to move towards the liquid discharge port 6 direction, and the liquid supply and discharge process of the pump body starts. At this time, the liquid inlet groove 4-a and the liquid discharge groove 6-a are respectively connected to the liquid inlet 4 and the liquid discharge port 6, so that the liquid inlet 4 and the liquid discharge port 6 are opened to carry out the supply and discharge of liquid, and at the same time the pump outlet 3 and the high-pressure liquid inlet 5 are closed.

[0023] When the cylindrical sliding vane 9 continues to rotate by more than an angle of π, the above processes of pumping out liquid and liquid supply and discharge are cycled, and the pump outlet 3, the high-pressure liquid inlet 5, the liquid inlet 4 and the liquid discharge port 6 are respectively connected to the pumping groove 3-b, the high-pressure liquid groove 5-b, the liquid inlet groove 4-b and the liquid discharge groove 6-b.

[0024] As Figure 3 shown, the servo motor 15 drives the pinion 16 and drives the large gear 17 to rotate. The large gear 17 is relatively thick, and its thickness exceeds the stroke of the piston 8 and the cylindrical sliding vane 9. The large gear 17 is on the piston shaft rod 10 to ensure the horizontal movement of the piston 8 and the cylindrical sliding vane 9.

[0025] As Figure 4 shown, one side of the bearing 14 is connected to the connecting shaft 13 by bolts, and the other side is connected to the piston shaft rod 10. The connecting shaft 13 and the piston shaft rod 10 are on the same axis, so that the piston shaft rod 10 rotates while moving axially.

[0026] As Figure 5 shown, the articulated connection between the crank and connecting rod mechanism 11 and the connecting shaft 13 is realized through the two-axis omnidirectional hinge 12.

Claims

1. Energy-saving high-pressure hydraulic pump device for ultra-high pressure fluid conditions, characterized by: It comprises a pump cylinder (1), a drive cylinder (2), a pump outlet (3) of the pump cylinder, a liquid inlet (4) of the pump cylinder, a high-pressure liquid inlet (5) of the drive cylinder, a liquid discharge port (6) of the drive cylinder, a hydraulic pump housing (7), a piston (8), a cylindrical slide (9), a piston shaft (10), a crank-connecting rod mechanism (11), a two-axis omnidirectional hinge (12), a connecting shaft (13), a bearing (14), a servo motor (15), a small gear (16) and a large gear (17); The cylindrical slide (9) is fixedly connected to the piston (8), and a groove is arranged on the cylindrical slide (9); the pump outlet (3) of the pump cylinder and the high-pressure liquid inlet (5) of the driving cylinder are connected to the external ultra-high-pressure fluid, and are opened and closed respectively through the pump outlet groove (3-a) and the high-pressure liquid groove (5-a) on the cylindrical slide (9); the liquid inlet (4) of the pump cylinder is connected to the supply water, and is opened and closed through the liquid inlet groove (4-a) on the cylindrical slide (9); the liquid discharge port (6) of the driving cylinder is opened and closed through the liquid discharge groove (6-a); The reciprocating motion of the piston is driven by a servo motor (15) and a high-pressure fluid in a driving cylinder. One end of a crank-connecting rod mechanism (11) is fixed, and the other end is hinged to a connecting shaft (13) through a two-axis omnidirectional hinge (12). The connecting shaft (13) is connected to a piston shaft (10) through a bearing (14). A large gear (17) is fixed on the piston shaft (10), and the large gear (17) is meshed with a small gear (16). The servo motor (15) drives the small gear (16) and the large gear (17) to realize the rotational motion of the piston shaft (10), the piston (8) and the cylindrical slide (9).

2. The energy-saving high-pressure hydraulic pump device according to claim 1, characterized in that: The cylindrical sliding vane (9) is in close contact with the inner wall of the hydraulic pump cavity and simultaneously performs reciprocating motion and rotational motion along the axial direction of the piston, and realizes the opening and closing of each fluid inlet and outlet through periodic docking of the pump outlet (3) of the pump cylinder and the pump outlet groove (3-a), the high-pressure liquid inlet (5) of the drive cylinder and the high-pressure liquid groove (5-a), the liquid inlet (4) of the pump cylinder and the liquid inlet groove (4-a), and the liquid discharge port (6) of the drive cylinder and the liquid discharge groove (6-a).

3. The energy-saving high-pressure hydraulic pump device according to claim 1, characterized in that: The pump-out groove (3-a) and the high-pressure liquid groove (5-a) on the cylindrical slide (9) are arranged along the axial direction of the cylindrical slide (9), and the liquid inlet groove (4-a) and the liquid discharge groove (6-a) are also arranged along the axial direction of the cylindrical slide (9); and the pump-out groove (3-a) and the liquid inlet groove (4-a), as well as the high-pressure liquid groove (5-a) and the liquid discharge groove (6-a), are respectively arranged periodically along the circumference of the cylindrical slide (9).

4. The energy-saving high-pressure hydraulic pump device according to claim 3, characterized in that: Each time the piston (8) reciprocates, the grooves on the cylindrical slide (9) periodically alternate, thereby realizing an opening and closing process of each fluid inlet and outlet.

5. The method for using the energy-saving high-pressure hydraulic pump device for ultra-high pressure fluid conditions according to any one of claims 1 to 4, characterized in that: The pump outlet (3) of the pump cylinder and the high-pressure liquid inlet (5) of the drive cylinder are externally filled with ultra-high-pressure fluid; in the process of pumping out the liquid, the piston (8) moves toward the pump outlet, and at the same time, the pump-out groove (3-a) and the high-pressure liquid groove (5-a) on the cylindrical slide (9) are respectively connected to the pump outlet (3) of the pump cylinder and the high-pressure liquid inlet (5) of the drive cylinder, and the pump outlet (3) of the pump cylinder and the high-pressure liquid inlet (5) of the drive cylinder are opened, so that the high-pressure fluid in the drive cylinder pushes the piston (8) to move; in this process, the liquid inlet (4) of the pump cylinder and the liquid discharge port (6) of the drive cylinder are connected through the cylindrical slide. The slide (9) is used to seal the pump body; during the process of supplying and draining the pump body, the piston (8) is driven by the servo motor (15) to move toward the drain port (6) of the driving cylinder, and at the same time, the liquid inlet groove (4-a) and the drain port (6-a) on the cylindrical slide (9) are respectively connected to the liquid inlet (4) of the pump cylinder and the drain port (6) of the driving cylinder, and the liquid inlet (4) of the pump cylinder and the drain port (6) of the driving cylinder are opened to realize the supply of fluid to the hydraulic pump and the discharge of liquid in the pump. At this time, the pump outlet (3) of the pump cylinder and the high-pressure liquid inlet (5) of the driving cylinder are closed by the cylindrical slide (9).

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