CN204591659U - A kind of plunger head rolling structure without piston shoes being applicable to radial plunger hydraulic pump - Google Patents

Abstract

A kind of plunger head rolling structure without piston shoes being applicable to radial plunger hydraulic pump, comprise the stators and rotators of axle flow distribution radial plunger pump, the offset of stator and rotor is adjustable, rotor is contained on pintle, circumferencial direction along rotor has uniform plunger hole, plunger is configured in plunger hole, rolling structure is adopted to be connected between plunger with stator, stator and swing frame are connected, swing frame crossbeam is connected with swing frame, stator, swing frame outside is provided with radial plunger pump casing, in the course of the work, without piston shoes mechanism between plunger and stator, it is rolling friction between plunger and stator, frictional force is much smaller than sliding friction, in addition without the need to the high pressure oil in plunger cavity is extracted lubrication, and then decrease the leakage of high pressure oil, realize energy-conservation.

Description

A sliding-shoe plunger head rolling structure suitable for radial plunger hydraulic pumps

technical field

The utility model belongs to the technical field of radial plunger hydraulic pumps, in particular to a sliding shoe-free plunger head rolling structure suitable for radial plunger hydraulic pumps.

Background technique

In the hydraulic system, the function of the hydraulic pump is to convert the mechanical energy of the prime mover such as the electric motor or the internal combustion engine into the pressure energy of the liquid, provide pressure oil to the system and drive the actuator to work, which belongs to the hydraulic power component.

There are many structural forms of radial piston pumps, but the common feature is that each plunger is arranged in the radial direction of the transmission shaft, that is, the centerline of each plunger is perpendicular to the centerline of the transmission shaft. The radial piston pump has a stator and a rotor, which are arranged eccentrically. The rotor is installed on the flow distribution shaft. There are many uniformly distributed plunger holes along the circumferential direction of the rotor, and the plunger can move flexibly in it. When the transmission shaft drives the rotor to rotate, the plunger reciprocates in the rotor plunger hole to realize the change of the sealing volume. Every time the rotor rotates once, each plunger reciprocates once to complete an oil suction and oil discharge process. The hydraulic oil enters the plunger cavity from the oil suction port of the pump body through the internal channel of the distribution shaft when the rotor rotates to the second half cycle. supply to the implementing agency. At present, the cooperation between the plunger and the stator of this type of pump is mainly connected by a sliding shoe mechanism. There is a pressure balance surface and a lubricating oil groove on the sliding shoe, so there is a problem of high-pressure oil leakage, resulting in energy waste. In addition, due to the gap between the sliding shoe and the stator It is surface contact, and it is sliding friction during exercise. The friction force is relatively large, the wear of the sliding boots is serious, and sometimes the sliding boots are stuck and crushed.

Contents of the invention

In order to overcome the above-mentioned shortcomings of the prior art, the purpose of this utility model is to provide a plunger head rolling structure without sliding shoes suitable for radial plunger hydraulic pumps, which reduces the leakage of high-pressure oil and realizes energy saving.

In order to achieve the above object, the technical scheme of the utility model is as follows:

A sliding shoe-less piston head rolling structure suitable for radial piston hydraulic pumps, including a stator 5 and a rotor 2 of a radial piston pump with axial flow distribution, the eccentricity of the stator 5 and the rotor 2 is adjustable, and the rotor 2 Installed on the flow distribution shaft 1, there are uniformly distributed plunger holes 3 along the circumferential direction of the rotor 2, the plunger 4 is arranged in the plunger hole 3, the plunger 4 and the stator 5 are connected by a rolling structure, and the stator 5 and the The swing frame 6 is fixedly connected, the swing frame beam 7 is connected with the swing frame 6, and the stator 5 and the swing frame 6 are provided with a radial plunger pump casing 8 outside.

The top of the plunger 4 has a groove 4-1, the steel ball 4-2 is laid in the groove 4-1, the cylinder 4-3 is pressed on the steel ball 4-2, and the other side of the cylinder 4-3 is topped On the inner surface of the stator 5, the cover plate 4-4 is connected with the plunger 4, and the cylinder 4-3 is clamped in the groove 4-1.

The top of the plunger 4 has a groove 4-1, the steel ball 4-2 is laid in the groove 4-1, the ball 4-6 is pressed on the steel ball 4-2, and the other side of the ball 4-6 tops On the inner surface groove of the stator 5, the cover plate 4-4 is connected with the plunger 4, and the ball 4-6 is clamped in the groove 4-1.

The utility model has the advantages: in the working process, there is no sliding shoe mechanism between the plunger and the stator, and there is rolling friction between the plunger and the stator, and the friction force is much smaller than the sliding friction; in addition, there is no need to draw out the high-pressure oil in the plunger cavity for lubrication , thereby reducing the leakage of high-pressure oil and realizing energy saving.

Description of drawings

Figure 1 is a schematic diagram of the overall structure of the utility model.

Fig. 2-1 is the assembly diagram of a kind of mode of plunger 4 of the present utility model; Fig. 2-2 is three views of plunger 4, wherein (a) is the sectional view of main view along the central symmetrical plane, (b) is Left view, (c) is top view.

Fig. 3-1 is an assembly drawing of another mode of the plunger 4 of the present invention; Fig. 3-2 is a three-view view of the plunger 4, wherein (a) is a cross-sectional view of the main view along the central symmetrical plane, and (b) is Left view, (c) is top view.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is described in detail.

Referring to Figure 1, a sliding shoe-less plunger head rolling structure suitable for radial piston hydraulic pumps includes a stator 5 and a rotor 2 of a radial piston pump with axial flow distribution, and the eccentricity between the stator 5 and the rotor 2 can be adjusted Adjustment, the rotor 2 is mounted on the flow distribution shaft 1, there are eleven uniformly distributed plunger holes 3 along the circumferential direction of the rotor 2, the plunger 4 is arranged in the plunger hole 3, and the gap between the plunger 4 and the stator 5 is adopted The rolling structure is connected, the stator 5 is fixedly connected with the swing frame 6, the swing frame beam 7 is connected with the swing frame 6, and the stator 5 and the swing frame 6 are provided with a radial plunger pump casing 8 outside.

Referring to Figure 2-1 and Figure 2-2, the top of the plunger 4 has a groove 4-1, the steel ball 4-2 is laid in the groove 4-1, and the cylinder 4-3 is pressed on the steel ball 4-1. 2, so that there is rolling friction between the cylinder 4-3 and the plunger 4, and the other side of the cylinder 4-3 is on the inner surface of the stator 5. When the plunger 4 rotates with the rotor, the cylinder 4-3 is on the inner surface of the stator 5. The inner surface is rolling, and the friction type is rolling friction. The cover plate 4-4 is connected with the plunger 4 through the screw 4-5, and the cylinder 4-3 is stuck in the groove 4-1 to prevent the cylinder 4-3 from falling off during the movement.

Referring to Figure 3-1 and Figure 3-2, the top of the plunger 4 has a groove 4-1, the steel ball 4-2 is laid in the groove 4-1, and the ball 4-6 is pressed on the steel ball 4-1. 2, so that there is rolling friction between the ball 4-6 and the plunger 4, and the other side of the ball 4-6 is on the inner surface groove of the stator 5. When the plunger 4 rotates with the rotor, the ball 4-6 Rolling in the inner surface groove of the stator 5, the friction type is rolling friction, the cover plate 4-4 is connected with the plunger 4 through the screw 4-5, and the ball 4-6 is stuck in the groove 4-1 to prevent the ball 4 -6 shed during exercise.

The working principle of the utility model is:

When the hydraulic pump is working, the plunger 4 reciprocates in the plunger hole 3 of the rotor 2 to realize the change of the sealing volume, and the plunger 4 follows the rotor 2 to make a circular motion. Every time the rotor 2 rotates, each plunger 4 Reciprocate once to complete an oil suction and oil discharge process. The hydraulic oil enters the plunger hole 3 from the oil suction port of the pump body through the internal channel of the distribution shaft 1 when the rotor 2 rotates to the second half cycle. It is discharged from the high-pressure area on the upper half of the distribution shaft 11 through the oil discharge port and supplied to the actuator.

In the groove 4-1 at the top of the plunger 4, a cylinder 4-3 or a ball 4-6 is installed in the groove 4-1, and a layer is laid between the cylinder 4-3 or the ball 4-6 and the plunger 4. The steel ball 4-2, so that the relative friction between the cylinder 4-3, the ball 4-6 and the plunger 4 is rolling friction, and the friction force is very small. The other side of the cylinder 4-3 and the ball 4-6 is on the inner surface of the stator 5. When the plunger 4 rotates with the rotor 2, the cylinder 4-3 and the ball 4-6 roll on the inner surface of the stator 5. The friction type For rolling friction, the friction force is much smaller than sliding friction, so as to achieve the effect of reducing friction.

Claims (3)

1. one kind is applicable to the plunger head rolling structure without piston shoes of radial plunger hydraulic pump, comprise stator (5) and the rotor (2) of axle flow distribution radial plunger pump, it is characterized in that: stator (5) is adjustable with the offset of rotor (2), rotor (2) is contained on pintle (1), circumferencial direction along rotor (2) has uniform plunger hole (3), plunger (4) is configured in plunger hole (3), rolling structure is adopted to be connected between plunger (4) with stator (5), stator (5) and swing frame (6) are connected, swing frame crossbeam (7) is connected with swing frame (6), stator (5), swing frame (6) outside is provided with radial plunger pump casing (8).

2. a kind of plunger head rolling structure without piston shoes being applicable to radial plunger hydraulic pump according to claim 1, it is characterized in that: described plunger (4) top has groove (4-1), steel ball (4-2) place mat is in groove (4-1), cylinder (4-3) is pressed on steel ball (4-2), cylinder (4-3) another side withstands on the internal surface of stator (5), cover plate (4-4) is connected with plunger (4), is stuck in groove (4-1) by cylinder (4-3).

3. a kind of plunger head rolling structure without piston shoes being applicable to radial plunger hydraulic pump according to claim 1, it is characterized in that: described plunger (4) top has groove (4-1), steel ball (4-2) place mat is in groove (4-1), ball (4-6) is pressed on steel ball (4-2), ball (4-6) another side withstands in the inner surface recesses of stator (5), cover plate (4-4) is connected with plunger (4), is stuck in groove (4-1) by ball (4-6).