Two-degree-of-freedom efficient piston pump

Abstract

The utility model provides a two-degree-of-freedom efficient piston pump, and belongs to the field of piston pumps. The piston pump solves the problem that the efficiency and the stability of a traditional piston pump can be limited when high-flow, high-pressure or special-flow-state fluid conveying is needed in some application scenes. The two-degree-of-freedom efficient piston pump comprises a cylinder body, a containing cavity is formed in the cylinder body, a piston seat used for transmitting power is arranged in the cylinder body, a first piston rod and a second piston rod which are used for transmitting power are arranged at the front end and the rear end of the piston seat respectively, and cams with a fixing function are arranged on the first piston rod and the second piston rod in a sleeving mode. The extending parts of the first piston rod and the second piston rod are respectively provided with a rolling wheel playing a rotating role, the rolling wheels are connected with the cam, and the second piston rod is provided with a coupler used for transmitting motion and torque. The utility model has the advantages that the volumetric efficiency of the pump is improved, and the mechanical efficiency of the pump is also improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of piston pumps and relates to a piston pump, in particular to a double-freedom-degree high-efficiency piston pump. Background Art

[0002] As an energy and power element, the pump has a decisive influence on the performance, efficiency and application areas of the hydraulic system. In particular, the axial piston pump, as a typical representative of hydraulic pumps, has the characteristics of high pressure, high speed and large flow, which meets the development and application requirements of high hydraulic power density. As a symbol of modern hydraulic technology, it has been a hot topic of attention and research since its birth in the early 20th century.

[0003] Traditional piston pumps (including plunger pumps, where the plunger can be seen as a type of plug) generally achieve the function of sucking and discharging oil by forming a periodically changing working chamber through the reciprocating motion of the piston, and complete the switching of the suction and discharge of oil in the working chamber through an independently designed distribution mechanism.

[0004] Traditional piston pumps usually have only one degree of freedom, which is the linear reciprocating motion of the piston in the cylinder. Although this design is simple, its efficiency and stability are limited in certain application scenarios, such as when high flow, high pressure or special flow patterns are required. Summary of the invention

[0005] The utility model aims to provide a dual-freedom high-efficiency piston pump in view of the above-mentioned problems existing in the prior art.

[0006] The purpose of the utility model can be achieved through the following technical solutions: a double-degree-of-freedom high-efficiency piston pump, comprising a cylinder body, a cavity is arranged in the cylinder body, and it is characterized in that a piston seat for transmitting power is arranged in the cylinder body, and a piston rod 1 and a piston rod 2 for transmitting power are respectively arranged on the front end and the rear end of the piston seat, and cams with a fixing function are sleeved on the piston rod 1 and the piston rod 2, and rollers for rotating are installed on the extended parts of the piston rod 1 and the piston rod 2, and the rollers are connected to the cams, and a coupling for transmitting motion and torque is arranged on the piston rod 2, a high-pressure distribution window and a low-pressure distribution window are arranged on the outer wall of the cylinder body, and a distribution groove connected to the high-pressure distribution window and the low-pressure distribution window is arranged on the piston seat.

[0007] In the above-mentioned dual-degree-of-freedom high-efficiency piston pump, a combined sealing ring for preventing air leakage is arranged on the piston rod one and the piston rod two, and the combined sealing ring is located in the cylinder body.

[0008] In the above-mentioned dual-degree-of-freedom high-efficiency piston pump, the cylinder body and the piston seat are both axisymmetric structures.

[0009] In the above-mentioned dual-degree-of-freedom high-efficiency piston pump, the cam is in the shape of a saddle.

[0010] Compared with the prior art, the dual-degree-of-freedom high-efficiency piston pump realizes the function of the pump through reciprocating motion and the function of the valve through rotational motion, which greatly simplifies the structure of the pump and greatly improves the power density. At the same time, it reduces the number of friction pairs and leakage links, thereby improving both the volumetric efficiency of the pump and the mechanical efficiency of the pump, making the pump efficient and long-lasting. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a cross-sectional view of the dual-freedom high-efficiency piston pump.

[0012] In the figure, 1, cylinder body; 2, chamber; 3, piston seat; 4, piston rod 1; 5, piston rod 2; 6, cam; 7, roller; 8, coupling; 9, high-pressure distribution window; 10, low-pressure distribution window; 11, distribution groove; 12, combined sealing ring. DETAILED DESCRIPTION

[0013] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0014] like Figure 1 As shown, the double-freedom high-efficiency piston pump comprises a cylinder body 1, a cavity 2 is arranged in the cylinder body 1, a piston seat 3 for transmitting power is arranged in the cylinder body 1, a piston rod 1 4 and a piston rod 2 5 for transmitting power are arranged on the front end and the rear end of the piston seat 3 respectively, a cam 6 with a fixing function is sleeved on the piston rod 1 4 and the piston rod 2 5, a roller 7 for rotating is installed on the extended part of the piston rod 1 4 and the piston rod 2 5, and the roller 7 is connected to the cam 6, and the roller 7 is installed on the saddle cam 6 at both ends of the cylinder body 1, and the motor or other input power is arranged on the piston rod 2 5. A coupling 8 for transmitting motion and torque is arranged on the piston rod 2 5. During the operation of the dual-degree-of-freedom piston pump, the piston seat 3 not only performs reciprocating motion to complete the suction and discharge of oil, but also performs rotational motion in the cylinder body 1. The rotation is used to realize the flow distribution function, eliminating the need for an independent flow distribution mechanism. A high-pressure flow distribution window 9 and a low-pressure flow distribution window 10 are provided on the outer wall of the cylinder body 1, and a flow distribution groove 11 connected to the high-pressure flow distribution window 9 and the low-pressure flow distribution window 10 is provided on the piston seat 3. The flow distribution groove 11 provided on the piston seat 3 communicates with the high-pressure and low-pressure flow distribution windows 10 provided on the cylinder body 1 according to different working conditions of the increase or decrease of the working chamber 2, thereby sucking oil from the low-pressure window and discharging oil from the high-pressure window, thereby realizing the flow distribution function.

[0015] To elaborate further, a combined sealing ring 12 for preventing air leakage is provided on the piston rod 1 4 and the piston rod 2 5 , and the combined sealing ring 12 is located in the cylinder body 1 . Installing the combined sealing ring 12 effectively improves the sealing performance of the piston rod 1 4 and the piston rod 2 5 .

[0016] To be more specific, the cylinder body 1 and the piston seat 3 are both axisymmetric structures.

[0017] In further detail, the cam 6 is in the shape of a saddle.

[0018] The specific embodiments described herein are merely examples of the spirit of the present invention. A person skilled in the art of the present invention may make various modifications or additions to the specific embodiments described or replace them in a similar manner, but this will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0019] Although this article uses more terms such as cylinder body 1, chamber 2, piston seat 3, piston rod 1 4, piston rod 2 5, cam 6, roller 7, coupling 8, high-pressure flow distribution window 9, low-pressure flow distribution window 10, flow distribution groove 11, combined sealing ring 12, etc., it does not exclude the possibility of using other terms. These terms are used only to more conveniently describe and explain the essence of the utility model; interpreting them as any additional restrictions is contrary to the spirit of the utility model.

Claims

1. A dual-degree-of-freedom high-efficiency piston pump, comprising a cylinder body (1), wherein a cavity (2) is provided in the cylinder body (1), characterized in that: The cylinder body (1) is provided with a piston seat (3) for transmitting power, and the front end and rear end of the piston seat (3) are respectively provided with a piston rod 1 (4) and a piston rod 2 (5) for transmitting power, and a cam (6) with a fixing function is sleeved on the piston rod 1 (4) and the piston rod 2 (5), and rollers (7) for rotating are installed on the extended parts of the piston rod 1 (4) and the piston rod 2 (5), and the rollers (7) are connected to the cam (6), and a coupling (8) for transmitting motion and torque is provided on the piston rod 2 (5), and a high-pressure distribution window (9) and a low-pressure distribution window (10) are provided on the outer wall of the cylinder body (1), and a distribution groove (11) connected to the high-pressure distribution window (9) and the low-pressure distribution window (10) is provided on the piston seat (3).

2. A dual-degree-of-freedom high-efficiency piston pump according to claim 1, characterized in that: The piston rod one (4) and the piston rod two (5) are provided with a combined sealing ring (12) for preventing air leakage, and the combined sealing ring (12) is located inside the cylinder body (1).

3. A dual-degree-of-freedom high-efficiency piston pump according to claim 1, characterized in that: The cylinder body (1) and the piston seat (3) are both axisymmetric structures.

4. A dual-degree-of-freedom high-efficiency piston pump according to claim 1, characterized in that: The cam (6) is in the shape of a saddle.

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