Annular high-flow plunger pump

Abstract

The invention relates to the technical field of plunger pumps, in particular to an annular high-flow plunger pump which comprises a base plate, a center wheel is rotationally connected to the base plate and is in transmission connection with a plurality of hydraulic cylinders through a plurality of transmission mechanisms, and the transmission mechanisms are evenly distributed around the center of the center wheel in an annular array mode. The transmission mechanism comprises swing planet wheels, sliding blocks and plungers, the swing planet wheels are meshed with the center wheel, the multiple swing planet wheels are further in meshed transmission connection with the gear ring at the same time, the swing planet wheels are connected with the sliding blocks through hinges, multiple guide rails are formed in the chassis, and the sliding blocks are arranged in the corresponding guide rails in a sliding mode respectively; the end, away from the swing planet wheel, of the sliding block is fixedly connected with a plunger, the plunger is connected with a hydraulic cylinder and can do reciprocating motion in the hydraulic cylinder to suck and discharge liquid, and a liquid inlet and a liquid outlet are formed in the hydraulic cylinder. According to the annular column type plunger pump, multiple sets of liquid suction and drainage actions are conducted at the same time, the liquid conveying amount in unit time is increased, and therefore large-flow output is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of plunger pumps, in particular to a ring-type large-flow plunger pump. Background Art

[0002] High efficiency, high pressure and large flow rate of liquid delivery are widely demanded in modern industrial society. Although the current volumetric pumps and vane pumps have different performances, it is difficult to meet these three requirements at the same time. The plunger pump is a type of volumetric pump. The plunger pump relies on the reciprocating motion of the plunger in the cylinder to change the volume of the sealed working chamber to achieve the suction and discharge of the working medium. It has the advantages of high rated pressure, compact structure, high efficiency and convenient flow regulation. It is widely used in high-pressure equipment, hydraulic platforms, engineering machinery, ships and other occasions that require high pressure and flow regulation.

[0003] Existing plunger pumps have the characteristics of high efficiency and high pressure, but their flow rate is relatively small. Although the flow rate of the plunger pump can be increased by increasing the pump speed, increasing the plunger stroke, and increasing the plunger diameter, it is easy to bring adverse effects in terms of vibration, structure, strength, etc. The industry has conducted long-term research and practice on large-flow plunger pumps, and proposed plunger pumps with multi-connected, opposed, and multi-connected opposed structures. Although the flow rate of the plunger pump has been increased to a certain extent, it still cannot meet the industrial needs of large-flow liquid transportation. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the defects of the prior art and provide a ring-type large-flow plunger pump. The ring-type plunger pump adopts a ring-type arrangement structure and realizes the transportation of working medium by driving the ring-type plungers through a central wheel, so that the flow rate of the plunger pump can be increased several times, which is of great significance to the technological progress and economic and social development in this field.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: A ring-type large-flow plunger pump includes a chassis, a center wheel is rotatably connected to the chassis, and the center wheel is respectively connected to multiple hydraulic cylinders through multiple transmission mechanisms. The multiple transmission mechanisms are evenly distributed around the center ring array of the center wheel. The transmission mechanism includes a swinging planetary wheel, a slider and a plunger. The swinging planetary wheel is meshed with the center wheel, and multiple swinging planetary wheels are also meshed with a gear ring for transmission connection. Multiple swinging planetary wheels form a planetary gear pair with the center wheel and the gear ring. The swinging planetary wheel rotates around the center wheel while rotating itself to achieve a swinging effect. The swinging planetary wheel is connected to the slider through a hinge, and multiple guide rails are provided on the chassis. The sliders are respectively slidably arranged in the corresponding guide rails. One end of the slider away from the swinging planetary wheel is fixedly connected to the plunger, so that the plunger moves horizontally along the guide rail direction to form a moving pair. The plunger is connected to the hydraulic cylinder and the plunger can reciprocate in the hydraulic cylinder to absorb and discharge liquid. A liquid inlet and a liquid discharge port are respectively provided on the hydraulic cylinder. The multiple liquid inlets are connected to the liquid inlet pipe through a pipeline, and the multiple liquid discharge ports are connected to the liquid discharge pipe through a pipeline. When the plunger retreats, the pressure in the hydraulic cylinder chamber decreases, forming a local vacuum, and the fluid is sucked into the chamber through the inlet pipe; when the plunger moves outward, the chamber pressure increases, and the fluid is discharged from the chamber into the discharge pipe.

[0006] When designing a ring-type large-flow plunger pump, multiple swing planetary gears are installed around the center wheel at a certain angle to achieve a ring-type arrangement of multiple transmission mechanisms.

[0007] The liquid inlet is provided with a liquid inlet check valve, and the liquid outlet is provided with a liquid discharge check valve. When the plunger retreats, the pressure in the hydraulic cylinder chamber decreases, forming a partial vacuum, the liquid inlet check valve opens, and the fluid is sucked into the chamber; when the plunger moves outward, the chamber pressure increases, the liquid inlet check valve closes, the liquid discharge check valve opens, and the fluid is discharged from the chamber.

[0008] The liquid inlet pipe is provided with a total liquid inlet, and the liquid discharge pipe is provided with a total liquid discharge port.

[0009] The number of the transmission mechanisms and hydraulic cylinders can be set according to demand, and multiple transmission mechanisms and hydraulic cylinders are arranged in a ring array around the central wheel and are symmetrically distributed.

[0010] The center wheel is rotatably connected to the chassis via a center shaft, and a motor drives the center shaft and the center wheel to rotate.

[0011] The swing planetary wheel is rotationally connected with the slider via a hinge shaft, and the hinge shaft and the center of the swing planetary wheel are eccentrically arranged to form a rotating pair.

[0012] The beneficial effects achieved by the present invention are: As a type of plunger pump, the annular large-flow plunger pump has the main advantages of a plunger pump, with high rated pressure, compact structure, high efficiency and convenient flow regulation. Based on the above structural characteristics, it contains multiple pump chambers, which can enable the annular plunger pump to perform multiple groups of suction and discharge actions at the same time, increasing the liquid delivery volume per unit time, thereby achieving a large flow output.

[0013] The swinging planetary gear in the annular plunger pump is installed at a certain angle, so that the plungers work alternately, which can effectively reduce the flow pulsation rate. Reasonable annular layout can make the design of the pump cavity more compact, reduce the residual liquid in the pump, and thus improve the volumetric efficiency.

[0014] In addition, the slider, piston and other moving parts are arranged in a ring and symmetrically distributed evenly on the circumference of the center wheel. The radial forces generated by the plunger at work will offset each other, reducing the unbalanced radial forces borne by the pump body, having better dynamic performance, making the plunger pump more stable during operation, and reducing vibration and noise caused by uneven force.

[0015] In addition, each transmission mechanism connected by the swinging planetary gear can be regarded as an independent working unit. Each working unit can be designed and manufactured relatively independently, and then assembled into a complete device. When maintaining the equipment, a single module can be easily inspected, repaired or replaced without large-scale disassembly of the entire equipment, reducing maintenance costs and difficulty. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings: Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 It is a partial structural schematic diagram of the present invention.

[0017] In the figure: 1. drain pipe; 2. inlet pipe; 3. guide rail; 4. chassis; 5. hydraulic cylinder; 6. plunger; 7. slider; 8. swing planetary gear; 9. center wheel; 10. drain port; 11. hinge shaft; 12. main inlet port; 13. main drain port; 14. ring gear. DETAILED DESCRIPTION

[0018] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0019] Example: like Figure 1 , Figure 2As shown, a ring-type large-flow plunger pump includes a chassis 4, a center wheel 9 is rotatably connected to the chassis 4, and the center wheel 9 is respectively connected to multiple hydraulic cylinders 5 through multiple transmission mechanisms, and the multiple transmission mechanisms are evenly distributed around the central ring array of the center wheel 9. The transmission mechanism includes a swinging planetary wheel 8, a slider 7 and a plunger 6. The swinging planetary wheel 8 is meshed with the center wheel 9, and multiple swinging planetary wheels 8 are also meshed with the ring gear 14. The multiple swinging planetary wheels 8, the center wheel 9 and the ring gear 14 form a planetary gear pair, and the swinging planetary wheel 8 rotates with the center wheel 9 to achieve a swinging effect.

[0020] The swing planetary wheel 8 is connected to the slider 7 by a hinge. Specifically, the swing planetary wheel 8 is rotatably connected to the slider 7 by a hinge shaft 11. The hinge shaft 11 is eccentrically arranged with the center of the swing planetary wheel 8 to form a rotating pair. A plurality of guide rails 3 are provided on the chassis 4. The guide rails 3 are linear slotted structures. The sliders 7 are respectively slidably arranged in the corresponding guide rails 3. The end of the slider 7 away from the swing planetary wheel 8 is fixedly connected to the plunger 6, so that the plunger 6 moves horizontally along the guide rail 3 to form a moving pair. The plunger 6 is connected to the hydraulic cylinder 5 to form a moving pair. The plunger 6 can extend into the interior of the hydraulic cylinder 5 and serve as the plunger rod of the hydraulic cylinder 5. A liquid inlet (not shown in the figure) and a liquid discharge port 10 are respectively arranged on the hydraulic cylinder 5. The plurality of liquid inlets are connected to the liquid inlet pipe 2 through a pipeline, and the plurality of liquid discharge ports 10 are connected to the liquid discharge pipe 1 through a pipeline. A liquid inlet check valve is arranged at the liquid inlet, and a liquid discharge check valve is arranged at the liquid discharge port 10. When the plunger 6 retreats, the pressure in the chamber of the hydraulic cylinder 5 decreases, forming a local vacuum, the liquid inlet check valve opens, and the fluid is sucked into the chamber; when the plunger 6 moves outward, the chamber pressure increases, the liquid inlet check valve closes, the liquid discharge check valve opens, and the fluid is discharged from the chamber.

[0021] The inlet pipe 2 is provided with a total inlet port 12, and the discharge pipe 1 is provided with a total discharge port 13. Liquid enters the plunger pump through the total inlet port 12, and the liquid in the inlet pipe 2 enters the hydraulic cylinder 5 through the inlet ports on each hydraulic cylinder 5, and then enters the discharge pipe 1 through the discharge port 10, and flows out of the plunger pump through the total discharge port 13.

[0022] The number of the transmission mechanism and the hydraulic cylinder 5 is preferably even, so that the sliding blocks 7, pistons and other moving parts are arranged in a ring array and symmetrically. Specifically, in this embodiment, the transmission mechanism is set to six groups and the hydraulic cylinder 5 is set to six.

[0023] The center wheel 9 is rotatably connected to the chassis 4 via a center shaft, and a motor drives the center shaft and the center wheel 9 to rotate.

[0024] In the ring-type structural design, the connection positions between each swing planetary wheel 8 and the slider 7 are different, so the working state of each plunger 6 unit is different, which can optimize the flow pulsation and power performance. In addition, the swing planetary wheel 8 swings around the center wheel 9 while rotating, and the reciprocating direction of the guide rail 3 and the plunger 6 is the radial direction of the center wheel 9; the six swing planetary wheels 8 and the center wheel 9 form a gear pair with a fixed center distance; the axes of the rotating pair formed by the six swing planetary wheels 8 and the six sliders 7 are parallel to each other and perpendicular to the plane of the center wheel 9; the center wheel 9 is driven by the motor to rotate, driving the working process of the plunger pump, and the center wheel 9 is the prime mover.

Claims

1. A ring-type large flow plunger pump, characterized in that: The invention comprises a chassis (4), a center wheel (9) being rotatably connected to the chassis (4), the center wheel (9) being respectively connected to a plurality of hydraulic cylinders (5) through a plurality of transmission mechanisms, the plurality of transmission mechanisms being evenly distributed in a central annular array around the center wheel (9), the transmission mechanism comprising a swinging planet wheel (8), a slider (7) and a plunger (6), the swinging planet wheel (8) being meshed with the center wheel (9), the plurality of swinging planet wheels (8) being simultaneously meshed with a gear ring (14) and connected to the swinging planet wheel (8) and the slider (7) through a hinge. A plurality of guide rails (3) are provided on the chassis (4), and sliders (7) are slidably arranged in the corresponding guide rails (3). One end of the slider (7) away from the swinging planetary gear (8) is fixedly connected to the plunger (6), and the plunger (6) is connected to the hydraulic cylinder (5) and the plunger (6) can reciprocate in the hydraulic cylinder (5) to absorb and discharge liquid. A liquid inlet and a liquid discharge port (10) are respectively arranged on the hydraulic cylinder (5), and the plurality of liquid inlets are connected to the liquid inlet pipe (2) through pipelines, and the plurality of liquid discharge ports (10) are connected to the liquid discharge pipe (1) through pipelines.

2. The annular large flow plunger pump according to claim 1, characterized in that: The liquid inlet is provided with a liquid inlet check valve, and the liquid discharge port (10) is provided with a liquid discharge check valve.

3. The annular large flow plunger pump according to claim 2, characterized in that: The liquid inlet pipe (2) is provided with a main liquid inlet port (12), and the liquid discharge pipe (1) is provided with a main liquid discharge port (13).

4. The annular large flow plunger pump according to claim 1, characterized in that: The central wheel (9) is rotatably connected to the chassis (4) via a central shaft, and a motor drives the central shaft and the central wheel (9) to rotate.

5. The annular large flow plunger pump according to claim 1, characterized in that: The swing planetary wheel (8) is rotationally connected to the slider (7) via a hinge shaft (11), and the hinge shaft (11) and the swing planetary wheel (8) are eccentrically arranged.

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