CN115596636A - Single-plunger hydraulic pump - Google Patents

Single-plunger hydraulic pump Download PDF

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Publication number
CN115596636A
CN115596636A CN202211274442.6A CN202211274442A CN115596636A CN 115596636 A CN115596636 A CN 115596636A CN 202211274442 A CN202211274442 A CN 202211274442A CN 115596636 A CN115596636 A CN 115596636A
Authority
CN
China
Prior art keywords
oil
cylinder
piston
water
hydraulic pump
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202211274442.6A
Other languages
Chinese (zh)
Inventor
赵东方
王增义
周开锋
杨超
闫睿
于丽昕
李银
曾新宇
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Beijing Drainage Group Co Ltd
Original Assignee
Beijing Drainage Group Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Beijing Drainage Group Co Ltd filed Critical Beijing Drainage Group Co Ltd
Priority to CN202211274442.6A priority Critical patent/CN115596636A/en
Publication of CN115596636A publication Critical patent/CN115596636A/en
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
    • F04B9/08—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid
    • F04B9/10—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid
    • F04B9/103—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having only one pumping chamber
    • F04B9/105—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having only one pumping chamber reciprocating movement of the pumping member being obtained by a double-acting liquid motor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/02—Packing the free space between cylinders and pistons
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/14—Pistons, piston-rods or piston-rod connections
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/16—Casings; Cylinders; Cylinder liners or heads; Fluid connections
    • F04B53/162—Adaptations of cylinders

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)

Abstract

The invention discloses a single-column hydraulic pump, which relates to the field of hydraulic reciprocating pumps and comprises: the oil cylinder is provided with a first oil port and a second oil port at two ends respectively; the first piston is movably arranged in the oil cylinder, and the first oil port and the second oil port can realize the reciprocating motion of the first piston through the switching of an oil inlet state and an oil outlet state; the water tank is provided with a first water inlet and outlet assembly and a second water inlet and outlet assembly at two ends respectively; the second piston is arranged in the water cylinder and is connected with the first piston through a first piston rod; the single-plunger hydraulic pump has the advantages that a power machine and a crank link mechanism of a power reciprocating pump are replaced by a hydraulic pump and a hydraulic cylinder at a power end, the hydraulic pump and the hydraulic cylinder are arranged into double cylinders of an oil cylinder and a water cylinder, one cylinder absorbs oil and presses oil while the other cylinder absorbs liquid to press out liquid by adjusting the movement of a piston, and the flow of the pump is kept constant when the two cylinders are connected, the pressure is not fluctuated, and the single-plunger hydraulic pump has the characteristics of high rated pressure, large flow and compact structure.

Description

Single-plunger hydraulic pump
Technical Field
The invention belongs to the field of hydraulic reciprocating pumps, and particularly relates to a single-column hydraulic pump.
Background
In recent years, hydraulic reciprocating pumps are developed at home and abroad, the traditional structure of the reciprocating pump is broken through structurally by utilizing hydraulic drive, a crank connecting rod mechanism of a motor reciprocating pump is replaced by a power oil cylinder, the uniform linear motion of a piston is realized by adopting a hydraulic drive mode, the constant suction and discharge flow is achieved, the motion characteristic and the power characteristic of the reciprocating pump are realized, and the requirements of long stroke, low stroke frequency, large cylinder diameter and variable displacement can be easily realized.
At present, hydraulic drive reciprocating pumps are in the research and development stage in China, and no mature products appear in the domestic market. The traditional reciprocating pump in China has many problems while the technology is mature day by day. The motion and power characteristics determined by the traditional crank connecting rod mechanism limit the application range and the development of the reciprocating pump, and the ideal requirements of constant flow and no pressure fluctuation cannot be realized.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides a single-plunger hydraulic pump, wherein a power machine and a crank connecting rod mechanism of a power reciprocating pump are replaced by a hydraulic pump and a hydraulic cylinder at a power end, the hydraulic pump and the hydraulic cylinder are arranged into double cylinders of an oil cylinder and a water cylinder, one cylinder sucks oil and presses oil while the other cylinder sucks liquid to press out liquid by regulating the movement of a piston, and the flow of the pump is kept constant when the two cylinders are connected, the pressure is not fluctuated, and the single-plunger hydraulic pump has the characteristics of high rated pressure, large flow and compact structure.
In order to achieve the above object, the present invention provides a single plunger hydraulic pump comprising:
the oil cylinder is provided with a first oil port and a second oil port at two ends respectively;
the first piston is movably arranged in the oil cylinder, and the first oil port and the second oil port can realize the reciprocating motion of the first piston through the switching of an oil inlet state and an oil outlet state;
the water tank is provided with a first water inlet and outlet assembly and a second water inlet and outlet assembly at two ends respectively;
and the second piston is arranged in the water cylinder and is connected with the first piston through a first piston rod.
Optionally, the cylinder body is separated by a middle end cover to form the oil cylinder and the water cylinder, and the first piston rod penetrates through the middle end cover.
Optionally, an oil cylinder cover and a water tank cover are respectively arranged at two ends of the cylinder body.
Optionally, a second piston rod penetrates through the oil cylinder cover, and one end of the second piston rod is connected with the first piston rod through a connecting seat.
Optionally, the first water inlet and outlet assembly comprises a first water inlet and a first water outlet, and the second water inlet and outlet assembly comprises a second water inlet and a second water outlet.
Optionally, the first water inlet and the first water outlet are arranged in a direction perpendicular to each other.
Optionally, a first control valve is disposed between the first water inlet and the second water inlet.
Optionally, a second control valve is arranged between the first water outlet and the second water outlet.
Optionally, a first sealing ring is arranged between the first piston and the oil cylinder, a second sealing ring is arranged between the middle end cover and the cylinder body, and a third sealing ring is arranged between the first piston rod and the middle end cover.
Optionally, the first oil port and the second oil port are respectively connected with a hydraulic pump.
The invention provides a single-plunger hydraulic pump, which has the beneficial effects that: the single-plunger hydraulic pump has the advantages of being capable of achieving constant flow, free of pressure fluctuation and even in discharge capacity, the oil cylinder and the water cylinder are integrally formed, the oil cylinder and the water cylinder are connected in a sealing mode through the sealing ring, anti-pollution capacity is improved, transmission efficiency is high, energy consumption can be saved, in addition, the single-plunger hydraulic pump is simple and compact in structure, small in size and few in parts, and accordingly manufacturing cost of the hydraulic pump is effectively controlled.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent by describing in more detail exemplary embodiments thereof with reference to the attached drawings, in which like reference numerals generally represent like parts throughout.
Fig. 1 shows a schematic view of a single-plunger hydraulic pump according to an embodiment of the present invention.
Fig. 2 shows a right side view of fig. 1.
Fig. 3 showsbase:Sub>A cross-sectional view alongbase:Sub>A-base:Sub>A of fig. 2.
Fig. 4 shows a cross-sectional view taken along line B-B of fig. 2.
Description of reference numerals:
1. an oil cylinder; 2. a first oil port; 3. a second oil port; 4. a first piston; 5. a water vat; 6. a second piston; 7. a first piston rod; 8. a cylinder body; 9. a middle end cap; 10. an oil cylinder cover; 11. a water tank cover; 12. a nut; 13. a second piston rod; 14. a connecting seat; 15. a first water inlet; 16. a first water outlet; 17. a second water inlet; 18. a second water outlet; 19. a second control valve; 20. a first seal ring; 21. a second seal ring; 22. a third seal ring; 23. a first control valve.
Detailed Description
Preferred embodiments of the present invention will be described in more detail below. While the following describes preferred embodiments of the present invention, it should be understood that the present invention may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
The invention provides a single-plunger hydraulic pump, comprising:
the oil cylinder is provided with a first oil port and a second oil port at two ends respectively;
the first piston is movably arranged in the oil cylinder, and the first oil port and the second oil port can realize the reciprocating motion of the first piston through the switching of an oil inlet state and an oil outlet state;
the water tank is provided with a first water inlet and outlet assembly and a second water inlet and outlet assembly at two ends respectively;
and the second piston is arranged in the water cylinder and is connected with the first piston through the first piston rod.
Concretely, this hydro-cylinder and water cylinder are connected through first piston rod and second piston rod, when the hydro-cylinder goes out the oil from the second hydraulic fluid port from first hydraulic fluid port oil feed simultaneously, under the promotion of hydraulic oil, first piston just can follow first hydraulic fluid port and move to second hydraulic fluid port direction, thereby drive first piston rod and the linkage of second piston rod, the second piston just can drive the second piston synchronous motion in the water cylinder like this, make the both sides space of second piston change like this, one side in crescent space begins to draw water through business turn over water assembly, one side in decreased space begins to drain through business turn over water assembly gradually, thereby realize the drainage of constant flow, and because the oil pressure is in the change of subassembly, too big fluctuation can not appear, the pressure of drainage also can remain stable like this.
Optionally, the cylinder body is separated by a middle end cover to form an oil cylinder and a water cylinder, and the first piston rod penetrates through the middle end cover.
Specifically, the oil cylinder and the water cylinder are arranged in a common cylinder body and are separated through the middle end cover, so that redundant transmission components do not need to be arranged between the first piston rod and the second piston rod, the movement synchronism of the first piston and the second piston is guaranteed, the same loss of drainage pressure and oil pressure is guaranteed, and the flow can be kept constant.
Optionally, both ends of the cylinder body are respectively provided with an oil cylinder cover and a water tank cover.
Specifically, the two ends of the cylinder body are respectively sealed through the oil cylinder cover and the water tank cover, so that the motion power of the first piston is completely from the pressure of hydraulic oil, and the pressure of water discharged by the water inlet and outlet assembly of the water tank is completely from the pushing of the second piston, so that the water pressure discharged by the single-plunger hydraulic pump can be controlled through the pressure of the hydraulic oil.
Optionally, a second piston rod penetrates through the oil cylinder cover, and one end of the second piston rod is connected with the first piston rod through a connecting seat.
Specifically, the second piston rod is movably arranged on the oil cylinder cover, the first piston and the second piston can be controlled outside the cylinder body through the second piston rod, and when no hydraulic oil is used for driving, the single-plunger hydraulic pump can also achieve the effect of a drainage pump.
Optionally, the first water inlet and outlet assembly comprises a first water inlet and a first water outlet, and the second water inlet and outlet assembly comprises a second water inlet and a second water outlet.
Optionally, the first water inlet and the first water outlet are arranged in a direction perpendicular to each other.
Specifically, first water inlet and first delivery port set up the one side at the second piston, second water inlet and second delivery port set up the opposite side at the second piston, when the hydro-cylinder drives first piston and removes to the jar direction, drive the second piston and remove in the jar, thereby make first water inlet water absorption and second delivery port drainage, and when the hydro-cylinder drives first piston and removes to keeping away from the jar direction, the second piston carries out reverse movement, thereby make second water inlet water absorption and first delivery port drainage, first piston can give the jar in succession and provide power under the drive of hydraulic oil like this, realize that this single-plunger hydraulic pump is continuous, the constant current drainage.
Optionally, a first control valve is provided between the first water inlet and the second water inlet.
Optionally, a second control valve is disposed between the first water outlet and the second water outlet.
Specifically, control valves are installed at two water outlets and two water inlets, and the water inlet and the water outlet can be opened in one direction and closed in the opposite direction in a group of water inlet and outlet assemblies. The first water outlet and the second water outlet are communicated and can keep continuously conveying outwards.
Optionally, a first sealing ring is arranged between the first piston and the oil cylinder, a second sealing ring is arranged between the intermediate end cover and the cylinder body, and a third sealing ring is arranged between the first piston rod and the intermediate end cover.
Specifically, the sealing rings are arranged on the peripheries of the first piston, the middle end cover and the first piston rod respectively, so that the spaces can be not communicated with each other, the first piston and the second piston can stably move, and the oil pressure and the water pressure are enabled to be free of fluctuation.
Optionally, the first oil port and the second oil port are respectively connected with a hydraulic pump.
Specifically, the oil cylinder provides power through the hydraulic pump to control the pressure of hydraulic oil entering the oil cylinder, so that the hydraulic pressure discharged by the water cylinder is convenient to control, and the operation is stable and reliable.
Examples
As shown in fig. 1 to 4, the present invention provides a single plunger hydraulic pump including:
the oil cylinder comprises an oil cylinder 1, wherein a first oil port 2 and a second oil port 3 are respectively arranged at two ends of the oil cylinder 1;
the first piston 4 is movably arranged in the oil cylinder 1, and the first oil port 2 and the second oil port 3 can realize the reciprocating motion of the first piston 4 through the switching of an oil inlet state and an oil outlet state;
the water tank 5 is provided with a first water inlet and outlet component and a second water inlet and outlet component at two ends of the water tank 5 respectively;
and a second piston 6 disposed in the water tank 5, the second piston 6 being connected to the first piston 4 through a first piston rod 7.
In this embodiment, the hydraulic cylinder further comprises a cylinder body 8, the cylinder body 8 is separated by an intermediate end cover 9 to form the oil cylinder 1 and the water cylinder 2, and the first piston rod 7 penetrates through the intermediate end cover 9.
In this embodiment, the cylinder block 8 is provided with an oil cylinder cover 10 and a water tank cover 11 at both ends thereof, and the water tank cover 11 is connected to the cylinder block 8 by a nut 12.
In this embodiment, the cylinder head 10 is provided with a second piston rod 13, and one end of the second piston rod 13 is connected to the first piston rod 7 through a connecting seat 14.
In this embodiment, the first water inlet and outlet assembly comprises a first water inlet 15 and a first water outlet 16, and the second water inlet and outlet assembly comprises a second water inlet 17 and a second water outlet 18.
In this embodiment, the first water inlet 15 and the first water outlet 16 are disposed in a direction perpendicular to each other.
In this embodiment, a first control valve 23 is arranged between the first water inlet 15 and the second water inlet 17.
In this embodiment, a second control valve 19 is disposed between the first water outlet 16 and the second water outlet 18.
In this embodiment, a first sealing ring 20 is disposed between the first piston 4 and the oil cylinder 1, a second sealing ring 21 is disposed between the intermediate end cover 9 and the cylinder body 8, and a third sealing ring 22 is disposed between the first piston rod 7 and the intermediate end cover 9.
In this embodiment, the first port 2 and the second port 3 are respectively connected to a hydraulic pump.
To sum up, the working parameters of the single-plunger hydraulic pump are respectively as follows: the continuous working pressure is 15MPa, the maximum working pressure is 20MPa, the maximum working displacement is 250 liters/minute, and the working stroke is 337mm. The oil cylinder 1 and the water cylinder 5 are independent closed containers, the volumes of two sides of the oil cylinder 1 and the volumes of two sides of the water cylinder 5 are changed by means of reciprocating motion of the first piston 4 and the second piston 6 respectively, the oil cylinder 1 can absorb and press oil, the water cylinder 4 can absorb and press water, the whole structure is a double-cylinder double-acting horizontal pump, hydraulic driving and electric control are mainly used, and the effects that water flow is kept constant and pressure is not fluctuated are finally achieved.
Having described embodiments of the present invention, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments.

Claims (10)

1. A single ram hydraulic pump, comprising:
the oil cylinder is provided with a first oil port and a second oil port at two ends respectively;
the first piston is movably arranged in the oil cylinder, and the first oil port and the second oil port can realize the reciprocating motion of the first piston through the switching of an oil inlet state and an oil outlet state;
the water tank is provided with a first water inlet and outlet assembly and a second water inlet and outlet assembly at two ends respectively;
and the second piston is arranged in the water cylinder and is connected with the first piston through a first piston rod.
2. The single ram hydraulic pump of claim 1, further comprising a cylinder block separated by an intermediate end cap to form the cylinder and the water tank, the first piston rod being disposed through the intermediate end cap.
3. The single ram hydraulic pump of claim 2, wherein an oil cylinder cover and a water tank cover are provided at both ends of the cylinder block, respectively.
4. The single-plunger hydraulic pump according to claim 3, wherein a second piston rod is arranged on the cylinder cover in a penetrating manner, and one end of the second piston rod is connected with the first piston rod through a connecting seat.
5. The single ram hydraulic pump of claim 1, wherein the first water in and out assembly includes a first water inlet and a first water outlet, and the second water in and out assembly includes a second water inlet and a second water outlet.
6. The single-plunger hydraulic pump according to claim 5, wherein the first water inlet and the first water outlet are arranged in a direction perpendicular to each other.
7. The single ram hydraulic pump of claim 5, wherein a first control valve is disposed between the first and second water inlets.
8. The single-plunger hydraulic pump of claim 5, wherein a second control valve is disposed between the first water outlet and the second water outlet.
9. The single ram hydraulic pump of claim 3, wherein a first seal ring is disposed between the first piston and the cylinder, a second seal ring is disposed between the intermediate end cap and the cylinder block, and a third seal ring is disposed between the first piston rod and the intermediate end cap.
10. The single ram hydraulic pump of claim 1, wherein the first and second oil ports are respectively connected to a hydraulic pump.
CN202211274442.6A 2022-10-18 2022-10-18 Single-plunger hydraulic pump Pending CN115596636A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202211274442.6A CN115596636A (en) 2022-10-18 2022-10-18 Single-plunger hydraulic pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202211274442.6A CN115596636A (en) 2022-10-18 2022-10-18 Single-plunger hydraulic pump

Publications (1)

Publication Number Publication Date
CN115596636A true CN115596636A (en) 2023-01-13

Family

ID=84847340

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202211274442.6A Pending CN115596636A (en) 2022-10-18 2022-10-18 Single-plunger hydraulic pump

Country Status (1)

Country Link
CN (1) CN115596636A (en)

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