CN218151277U

CN218151277U - Multi-plunger hydraulic pump

Info

Publication number: CN218151277U
Application number: CN202221318849.XU
Authority: CN
Inventors: 张宝奎
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-05-30
Filing date: 2022-05-30
Publication date: 2022-12-27
Anticipated expiration: 2032-05-30

Abstract

A multi-plunger hydraulic pump comprises a swash plate, a cylinder body and a plurality of plunger components, wherein one end of each plunger component is arranged on the cylinder body and is pressed on the inclined surface of the swash plate; a distribution groove is arranged on the stroke of the swash plate from the high point to the low point and is communicated with the cavity of the water hydraulic pump. The utility model discloses a set up the flow distribution groove on the sloping cam plate, realize intaking simultaneously from the both ends of plunger to increased the flow that absorbs water, also reduced return stroke dish axial atress simultaneously. The generation of bubbles is reduced, the cavitation phenomenon is reduced, and the working noise is obviously reduced. The water inlet at the swash plate also lubricates and cools the sliding friction between the swash plate and the plunger assembly, reduces the abrasion between each part, reduces the working temperature of the pump body, and greatly prolongs the service life of the hydraulic pump. The utility model discloses the rotational speed can reach 3000 r/min, and work efficiency realizes doubling, and simultaneously because the increase of motor speed can use the rotational speed higher, the lower dipolar motor of price relatively, the volume is littleer, and the cost is lower.

Description

Multi-plunger hydraulic pump

Technical Field

The utility model belongs to the technical field of the fluid pump, especially, relate to a many plungers hydraulic pump.

Background

The working principle of the multi-plunger fluid pump is that a plurality of plungers slide along a slope to generate axial movement of the plungers, so that fluid is sucked and pumped out. When the plunger slides from the high point to the low point of the swash plate, negative pressure is generated in the fluid pump cavity to suck fluid, and when the plunger slides from the low point to the high point of the swash plate, high pressure is generated in the plunger cavity to pump out the fluid.

In the working process of a plunger fluid pump in the prior art, when negative pressure water is absorbed in a pump cavity, the axial stress of a return disc is serious, the return disc rotates forcibly (the plunger absorbs water axially) to generate bubbles when rotating, the cavitation phenomenon is serious when more bubbles exist, and abnormal sound is generated in the operation process. Therefore, the running speed of the existing plunger fluid pump is 1500-1800r/min, and the problems of unbalanced stress of product parts, high working noise, short service life and the like exist due to the cavitation phenomenon.

Disclosure of Invention

The utility model aims to provide a many plungers hydraulic pump that the rotational speed is high, the flow is big, noise at work is low, long service life to prior art's defect.

The utility model discloses a realize above-mentioned purpose, adopt following technical scheme:

a multi-plunger hydraulic pump comprises a swash plate, a cylinder body and a plurality of plunger assemblies, wherein one end of each plunger assembly is arranged on the cylinder body and is pressed against the inclined surface of the swash plate; the method is characterized in that: a distribution groove is arranged on the stroke of the swash plate from a high point to a low point and is communicated with the cavity of the water hydraulic pump. Set up the distribution groove on the sloping cam plate, when the plunger slides from the high point of sloping cam plate to the low point, negative pressure absorbs water in the pump cavity, and rivers flow into the plunger top this moment, through the cavity clearance until in the distribution groove cavity, realize intaking simultaneously from the both ends of plunger to the flow of absorbing water has been increased, has also reduced return stroke dish axial atress simultaneously. The generation of bubbles is reduced along with the increase of the flow, the cavitation phenomenon is reduced, and the working noise is obviously reduced. The water inlet at the swash plate also lubricates and cools the sliding friction between the swash plate and the plunger assembly, reduces the abrasion between each part, reduces the working temperature of the pump body, and greatly prolongs the service life of the hydraulic pump.

Preferably: the distribution groove is a kidney-shaped groove, the shape of the kidney-shaped groove corresponds to the stroke track of the plunger assembly, and the lubricating and cooling effects on the friction surface are guaranteed.

It is further characterized in that: the plunger assembly comprises a slipper and a plunger; the sliding shoe is pressed against the inclined plane of the swash plate; the plunger head is provided with a ball head which is pressed in a ball socket of the sliding boot; the ball head is constrained in the ball socket by a return disc. Through the cooperation of the ball head and the ball socket, the sliding of the plunger assembly on the surface of the swash plate is converted into the axial movement of the plunger, so that the suction and the pumping of water flow are realized.

It is further characterized in that: the cylinder body is fixedly connected to the rotating shaft, a shell is arranged outside the cylinder body, and a front end cover and a rear end cover are respectively arranged at two ends of the shell; and a flow distribution plate and a floating plate assembly are sequentially arranged between the rear end cover and the cylinder body.

And further: the position of the distributing groove corresponds to the water inlet groove on the distributing plate.

Preferably: a water flow channel is arranged between the cylinder body and the shell. Through setting up the rivers passageway, can increase the flow that absorbs water to reduce the production of bubble, also can make rivers can be quick reach the sloping cam plate position.

Preferably: the water flow channel is a water feeding groove arranged on the outer circumference of the cylinder body. The water tank is arranged on the outer circumference of the cylinder body, so that the processing of parts is facilitated while the water flow is ensured.

Further: and a central spring is arranged on a rotating shaft between the floating disc assembly and the cylinder body, and one end of a plunger assembly on the cylinder body is pressed on the inclined surface of the swash plate. The plunger assembly can be always pressed on the inclined surface of the swash plate through the arrangement of the central spring, can slide along the inclined surface of the swash plate, and converts the rotation into the axial movement of the plunger.

Further: and the rotating shaft is positioned at the front end cover and is provided with a mechanical seal.

The utility model discloses a set up the flow distribution groove on the sloping cam plate, realize intaking simultaneously from the both ends of plunger to increased the flow that absorbs water, also reduced return stroke dish axial atress simultaneously. The generation of bubbles is reduced, the cavitation phenomenon is reduced, and the working noise is obviously reduced. The water inlet at the swash plate also lubricates and cools the sliding friction between the swash plate and the plunger assembly, reduces the abrasion between all parts, reduces the working temperature of the pump body, and greatly prolongs the service life of the hydraulic pump. The utility model discloses the rotational speed can reach 3000 r/min, and work efficiency realizes doubling, and simultaneously because the increase of motor speed can use the rotational speed higher, the lower dipolar motor of price relatively, the volume is littleer, and the cost is lower.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic view of the swash plate structure.

Fig. 3 is a schematic structural view of the port plate.

Detailed Description

As shown in fig. 1, a multi-plunger hydraulic pump includes a rotary shaft 3, a cylinder block 5, a housing 4, a swash plate 2, and a plurality of plunger assemblies 10. The cylinder body 5 is fixedly connected to the rotating shaft 3, the shell 4 is arranged outside the cylinder body 5, and the front end cover 1 and the rear end cover 8 are respectively arranged at two ends of the shell 4; a valve plate 7 and a floating plate assembly 6 are sequentially arranged between the rear end cover 8 and the cylinder body 5. A central spring 9 is arranged on the rotating shaft 3 between the floating disc assembly 6 and the cylinder body 5, and one end of a plunger assembly 10 on the cylinder body 5 is pressed against the inclined surface of the swash plate 2. As shown in FIG. 3, port plate 7 has an inlet channel 71 at a position from the high point to the low point of swashplate 2, and an outlet channel 72 at a position from the low point to the high point of swashplate 2. The mechanical seal 12 is arranged at the front end cover 1 of the rotating shaft 3. A plurality of plunger assemblies 10 are provided on the cylinder block 5 with one end pressed against the inclined surface of the swash plate 2. As shown in FIG. 2, a waist-shaped distribution groove 21 is arranged on the stroke of the swash plate 2 from a high point to a low point, and the distribution groove 21 is communicated with a water hydraulic pump cavity. The plunger assembly 10 includes a slipper and a plunger; the sliding shoes are pressed on the inclined plane of the swash plate 2; the plunger head has a ball head which bears against a ball socket of the sliding shoe, the ball head being confined in the ball socket by a return disc 11. The sliding of the plunger assembly 10 on the surface of the swash plate 2 is converted into axial movement of the plunger by the cooperation of the ball and socket. The cylinder 5 has a water groove on the outer circumference thereof, and a water flow passage is formed between the cylinder 5 and the housing 4.

The utility model discloses during operation, 3 drive cylinder body 5 of pivot rotate, drive plunger subassembly 10 on the cylinder body 5 and slide along the inclined plane of sloping cam plate 2. When the plunger slides from the high point to the low point of the swash plate 2, negative pressure is generated in the pump chamber, and water is sucked through the water inlet groove 71 of the port plate 7. At the moment, water flows into the top of the plunger and flows into the cavity of the distribution groove 21 through the cavity gap, so that water is simultaneously fed from two ends of the plunger, the water absorption flow is increased, and the axial stress of the return disc 11 is reduced. Due to the increase of the flow, the generation of bubbles is reduced, the cavitation phenomenon is reduced, and the working noise is obviously reduced. The sliding friction between the swash plate 2 and the plunger assembly 10 is lubricated and cooled down simultaneously to the intaking of swash plate 2 department, has reduced the wearing and tearing between each part, reduces the operating temperature of the pump body, has improved the life of hydraulic pump greatly. When the plunger slides from the low point to the high point of the swashplate 2, high pressure is generated above the plunger, pumping water from the pump chamber out of the outlet channel 72 of the port plate 7. The plunger reciprocates to realize the suction and pumping of water flow.

Because the utility model discloses 11 axial atresss of return stroke dish are little, and the cavitation phenomenon also effectively reduces, and wearing and tearing are little between each part, and operating temperature and low in noise, the rotational speed can reach 3000 r/min, and work efficiency realizes doubling, and simultaneously because the increase of motor speed can use the rotational speed higher, the relatively lower dipolar motor of price, the volume is littleer, and the cost is lower.

Claims

1. A multi-plunger hydraulic pump comprises a swash plate, a cylinder body and a plurality of plunger components, wherein one end of each plunger component is arranged on the cylinder body and is pressed against the inclined surface of the swash plate; the method is characterized in that: a distribution groove is arranged on the stroke of the swash plate from a high point to a low point and is communicated with the cavity of the water hydraulic pump.

2. The multi-plunger hydraulic pump of claim 1, wherein: the distribution groove is a kidney-shaped groove.

3. The multi-plunger hydraulic pump of claim 2, wherein: the plunger assembly comprises a slipper and a plunger; the sliding shoes are pressed on the inclined plane of the swash plate; the plunger head is provided with a ball head which is pressed in a ball socket of the sliding boot; the ball head is restrained in the ball socket by a return disc.

4. The multiple plunger hydraulic pump of any one of claims 1-3, wherein: the cylinder body is fixedly connected to the rotating shaft, a shell is arranged outside the cylinder body, and a front end cover and a rear end cover are respectively arranged at two ends of the shell; and a flow distribution plate and a floating plate assembly are sequentially arranged between the rear end cover and the cylinder body.

5. The multi-plunger hydraulic pump of claim 4, wherein: the position of the distributing groove corresponds to the water inlet groove on the distributing plate.

6. The multi-plunger hydraulic pump of claim 4, wherein: a water flow channel is arranged between the cylinder body and the shell.

7. The multi-plunger water hydraulic pump of claim 6, wherein: the water flow passage is a water channel arranged on the outer circumference of the cylinder body.

8. The multi-plunger hydraulic pump of claim 4, wherein: and a central spring is arranged on a rotating shaft between the floating disc assembly and the cylinder body, and one end of a plunger assembly on the cylinder body is pressed on the inclined surface of the swash plate.

9. The multi-plunger hydraulic pump of claim 4, wherein: and the rotating shaft is positioned at the front end cover and is provided with a mechanical seal.