CN201152256Y - Triangular rotor hydraulic pump - Google Patents

Abstract

A triangular rotor hydraulic pump comprises a stator and a rotor arranged at the inner cavity of the stator. An oil inlet and an oil outlet which are communicated with the inner cavity are arranged on the stator, the oil inlet and the oil outlet are respectively communicated with an oil sucking port and an oil pressing port through an oil-entry trough and an oil-out trough, the inner cavity of the stator presents a 8-shaped trochoid curve surface, the rotor presents an equilateral triangle, and the center of the rotor is provided with an annular gear engaged with a sun gear on a power input shaft. The rotor of the triangular rotor hydraulic pump presents a triangle, the three top angles of the rotor always contact sufficiently with the inner cavity of the stator at any time of rotating, so that the sealing property is favorable, the self-suction capacity is better, the rotation is smooth, and the noise is less. In addition, because the pump can suck and press oil six times when the rotor rotates one lap, the efficiency is higher.

Description

Triangular rotor hydraulic pump

technical field

The utility model relates to a rotor hydraulic pump, in particular to a triangular rotor hydraulic pump.

Background technique

The rotor hydraulic pump is a device that can provide hydraulic energy with a certain flow and pressure or a lubricating oil source for circulating lubrication in hydraulic systems and mechanical transmissions. Existing hydraulic pumps mainly include gear pumps, vane pumps and plunger pumps. The vane pump belongs to a kind of rotor pump, which is mainly composed of rotor, stator, vane and other parts. The stator has a cylindrical inner surface, and there is an eccentric distance between the stator and the rotor. The blades are installed in the grooves on the rotor and can slide flexibly in the grooves. When the rotor rotates, due to the centrifugal force and the pressure oil at the blade root, the top of the blade is close to the inner surface of the stator, so that several sealed and variable-volume working chambers are formed between every two blades, the stator, and the rotor. , the process of oil absorption and oil pressure can be completed by using the change of the volume of the working chamber. Due to its compact structure, small size and high efficiency, the vane pump is widely used in various medium and low pressure hydraulic systems. However, the vane pump has poor self-priming ability and is sensitive to oil pollution, which limits its application in some occasions.

Contents of the invention

The purpose of the utility model is to overcome the above-mentioned shortcomings of the prior art and provide a triangular rotor hydraulic pump with simple and compact structure and strong self-priming ability.

In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: comprising a stator and a rotor arranged in the inner cavity of the stator, the stator is provided with an oil inlet and an oil outlet communicating with the inner cavity, the oil inlet 2, and The oil outlet is connected to the oil suction port and the oil pressure port respectively through the oil inlet groove and the oil outlet groove. It is characterized in that: the inner cavity of the stator is an "8"-shaped cycloidal curve surface, and the rotor is an equilateral triangle. , and the center of the rotor is also provided with an inner ring gear that meshes with the sun gear on the power input shaft.

The three sides of the rotor of the utility model are all outwardly protruding arcs, and the three sides of the rotor are respectively provided with oil seals; The oil inlet tank and the oil outlet tank are connected.

Since the rotor of the utility model is triangular, at any time during rotation, its three vertices are always in good contact with the inner cavity of the stator, so it has good sealing performance, strong self-priming ability, stable rotation and low noise. Since the rotor sucks and presses oil six times per revolution, it has higher efficiency.

Description of drawings

Fig. 1 is the first working process schematic diagram of the present utility model;

Fig. 2 is the second working process schematic diagram of the present utility model;

Fig. 3 is the 3rd working process schematic diagram of the present utility model;

Fig. 4 is a schematic diagram of the fourth working process of the present invention.

Detailed ways

Below in conjunction with accompanying drawing, structural principle and working principle of the present utility model are described in further detail.

Referring to Fig. 1, the utility model is made up of stator 3 and rotor 4, and stator 3 cavity is the trochoid curve surface of " 8 " shape, and has oil inlet 2, oil inlet 11, oil outlet 5 and Oil outlet 12. The oil inlets 2 and 11 are connected to the oil inlet groove 16 through the oil inlet check valves 17 and 10 respectively, and the oil suction port 14 on the oil inlet groove 16 communicates with the oil tank 13 . The oil outlets 5 and 12 are respectively connected to the oil outlet 6 through the check valve oil outlets 7 and 15, and the oil outlet 6 communicates with the pressure oil port 1. The oil inlet groove 16 and the oil outlet groove 6 are not communicated with each other, and each constitutes an independent passage. The rotor 4 is in the shape of an "equilateral triangle", and each side has a certain outwardly protruding arc. The center of the rotor 4 is equipped with an inner ring gear 9 that can mesh with a sun gear 8 mounted on the power input shaft.

When the central gear 8 on the input shaft rotates clockwise, the central ring gear 9 of the triangular rotor 4 revolves around the central gear 8 of the input shaft, and at the same time, the triangular rotor 4 itself rotates around its center. When the triangular rotor 4 rotates clockwise, the inner ring gear 9 centered on the center of the triangular rotor 4 meshes with the central gear 8 centered on the center of the input shaft, and the ratio of the number of teeth of the inner ring gear 9 to the central gear 8 is 3:2 . The above-mentioned kinematic relationship makes the motion locus of the vertices of the triangular rotor 4 (that is, the shape of the inner cavity of the stator) resemble an "8" shape. The triangular rotor 4 divides the inner cavity of the stator 3 into three independent, closed spaces with variable volumes. The volumes of the three spaces change continuously with the movement of the triangular rotor 4, thereby respectively completing the process of oil absorption and oil pressure. The triangular rotor 4 rotates once, the volume space corresponding to each side absorbs oil and presses oil twice, and the hydraulic pump as a whole absorbs oil and presses oil six times.

In order to obtain better sealing, prolong the life-span of the hydraulic pump, and improve efficiency, oil seals are installed on three sides 18, 19, 20 of the triangular rotor 4.

Referring to FIG. 1 , when the triangular rotor 4 turns to the position shown in FIG. 1 , the volume space corresponding to the side 18 reaches the maximum, and the oil suction reaches saturation, and the oil pressure process is about to begin. As the triangular rotor 4 continues to rotate clockwise, the volume space corresponding to the side 18 gradually decreases, the one-way valve 17 is closed, and the one-way valve 7 is opened to start oil pressure, so that the hydraulic oil flows out from the oil pressure port 1 through the oil outlet groove 6; The volume space corresponding to the side 19 becomes larger, the one-way valve 10 is opened, and the hydraulic oil is sucked into the volume chamber by the oil cylinder 13 through the oil suction port 14 and the oil inlet groove 16; the volume space corresponding to the side 20 becomes smaller, the one-way valve 15 is opened, and the hydraulic oil Discharged from oil pressure port 1.

Referring to Figure 2, when the triangular rotor 4 turns to the position shown in Figure 2, the volume space corresponding to the side 18 becomes the minimum, and the oil pressure ends. With the clockwise rotation of the rotor, the volume space corresponding to the side 18 gradually becomes larger, and the one-way valve 7 is closed, the one-way valve 10 is opened, and the volume space starts to absorb oil; the space corresponding to the side 19 gradually becomes smaller, the one-way valve 15 is opened, and the corresponding volume space starts to press oil; the volume space corresponding to the side 20 becomes larger, and continues to absorb oil.

Referring to FIG. 3 , when the triangular rotor 4 turns to the position shown in FIG. 3 , the volume space corresponding to side 18 completes the oil suction and starts to press oil; the volume space corresponding to side 19 continues to increase and continues to absorb oil. The volume space corresponding to the side 20 continues to shrink, and the oil is continued to be pressed.

Referring to Fig. 4, when the triangular rotor 4 turns to the position in Fig. 4, the oil pressure in the volume space corresponding to side 18 is completed, and oil suction begins; the volume space corresponding to side 19 continues to decrease, and oil pressure continues; the volume space corresponding to side 18 continues to increase , continue to absorb oil.

The three volume spaces corresponding to each side of the triangular rotor 4 change continuously with the clockwise rotation of the triangular rotor 4 , so that the processes of oil absorption and oil pressure are respectively completed successively. The triangular rotor 4 rotates once, the volume space corresponding to each side absorbs oil and presses oil twice, and the hydraulic pump as a whole absorbs oil and presses oil six times.

At any time when the triangular rotor 4 rotates, its three vertices are always in good contact with the inner cavity of the stator 3, so it has good sealing performance, strong self-priming ability, stable rotation and low noise. Since the rotor sucks and presses oil six times per revolution, it has higher efficiency.

Claims (3)

1, a kind of triangular rotor hydraulic pump, comprise stator (3) and be arranged on the rotor (4) of stator (3) inner chamber, stator (3) is provided with the filler opening (2 with its intracavity inter-connection, 11) and oil outlet (5,12), filler opening (2,11) and oil outlet (5,12) respectively by oil-feed tank (16) with go out oil groove (6) and inlet port (13) and press hydraulic fluid port (1) to be connected, it is characterized in that: the inner chamber of said stator (3) is the surplus pendulum curvilinear plane of the figure of eight, said rotor (4) is equilateral triangle, and also is provided with the ring gear (9) that is meshed with central gear (8) on the power input shaft at the center of rotor (4).

2, triangular rotor hydraulic pump according to claim 1 is characterized in that: three limits (18,19,20) of said rotor (4) are export-oriented outstanding arc, and are respectively arranged with oil sealing on three limits (18,19,20) of rotor (4).

3, triangular rotor hydraulic pump according to claim 1 is characterized in that: said filler opening (2,11) and oil outlet (5,12) respectively by filler opening one-way valve (17,10) and oil outlet one-way valve (7,15) with oil-feed tank (16) with go out oil groove (6) and be connected.

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