CN113623162A

CN113623162A - Micro-flow rotary plunger pump

Info

Publication number: CN113623162A
Application number: CN202111037648.2A
Authority: CN
Inventors: 周财华; 徐卫华; 严东楠; 童玥雯
Original assignee: DEPAMU (HANGZHOU) PUMP TECHNOLOGY CO LTD
Current assignee: DEPAMU (HANGZHOU) PUMP TECHNOLOGY CO LTD
Priority date: 2021-09-06
Filing date: 2021-09-06
Publication date: 2021-11-09

Abstract

The invention provides a micro-flow rotary plunger pump, which adopts the technical scheme that the pump comprises an outer shell, wherein a rotatable cylinder body is arranged in the outer shell, a rotating shaft is inserted in the middle of the cylinder body, a swash plate is fixed in the outer shell, a plurality of plungers which are uniformly distributed on the circumference are arranged in the cylinder body, one end of the inclined surface of the swash plate faces the plungers, an annular chute is formed in the swash plate, a spring is connected between each plunger and the cylinder body, and the end of each plunger is always positioned in the annular chute under the action of the spring. The invention can reduce the impact force of the reciprocating motion of the plunger in the working process and prolong the service life of the plunger pump.

Description

Micro-flow rotary plunger pump

Technical Field

The invention belongs to the technical field of plunger pumps, and particularly relates to a micro-flow rotary plunger pump.

Background

The plunger pump is an important device of the hydraulic system. The plunger reciprocates in the cylinder body to change the volume of the sealed working cavity so as to absorb and press oil. The plunger pump has the advantages of high rated pressure, compact structure, high efficiency, convenient flow regulation and the like, and is widely applied to occasions with high pressure, large flow and flow needing to be regulated.

Plunger pump is at practical in-process, through drive arrangement drive plunger reciprocating motion, but in frequent reciprocal, great to the impact of plunger, cause wearing and tearing easily simultaneously, long-time work can cause the flow unstable.

Disclosure of Invention

The invention aims to provide a micro-flow rotary plunger pump with good balance, which can reduce the impact force of the reciprocating motion of a plunger in the working process and prolong the service life of the plunger pump.

The invention provides a micro-flow rotary plunger pump, which adopts the technical scheme that the pump comprises an outer shell, wherein a rotatable cylinder body is arranged in the outer shell, a rotating shaft is inserted in the middle of the cylinder body, a swash plate is fixed in the outer shell, a plurality of plungers which are uniformly distributed on the circumference are arranged in the cylinder body, one end of the inclined surface of the swash plate faces the plungers, an annular chute is formed in the swash plate, a spring is connected between each plunger and the cylinder body, the end head of each plunger is always positioned in the annular chute under the action of the spring, a spherical head is arranged at the end head of each plunger, and a flow distribution plate is arranged in the outer shell.

Preferably, the spherical head is connected with the plunger in a spherical hinge mode, the section of the annular chute is a spherical surface, and the outer surface of the spherical head is always in contact with the side wall of the annular chute.

Preferably, the end of plunger is equipped with and is used for the installation the spherical installation department of spherical head, be equipped with the buffer layer on the lateral wall of spherical installation department.

Preferably, the side wall of the annular chute is provided with a wear-resistant layer.

Preferably, the valve plate is connected with the cylinder body in a sealing mode, a waist-shaped feeding hole and a waist-shaped discharging hole are formed in the valve plate, and the feeding hole and the discharging hole are symmetrically arranged.

Preferably, the number of plungers is 3, 4, 5 or 6.

Preferably, the maximum movement range of the plunger is 5-8 cm.

In summary, the technical scheme of the invention at least has the following beneficial effects:

1. by arranging the annular sliding groove, the plunger piston can be better contacted with the swash plate, and the stability is improved;

2. through setting up spherical head structure, make the plunger rotate the in-process and contact with the sloping cam plate all the time to guarantee the transmission of moment, avoid producing the moment of torsion phenomenon.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic front view of the overall structure of the present invention;

FIG. 2 is a top view of the distribution of the plungers on the cylinder of the present invention;

FIG. 3 is a bottom view of the ramp structure of the swashplate of the present invention;

FIG. 4 is a top view of the port plate construction of the present invention;

fig. 5 is an enlarged view of a portion of fig. 1 of the present invention.

In the figure; 1. an outer housing; 2. a cylinder body; 3. a rotating shaft; 4. a swash plate; 5. a plunger; 6. an annular chute; 7. a spring; 8. a spherical head; 9. a buffer layer; 10. a wear layer; 11. a valve plate; 12. a feed inlet; 13. and (4) a discharge port.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The invention provides a micro-flow rotary plunger pump, which comprises an outer shell 1, wherein a rotatable cylinder body 2 is arranged in the outer shell 1, a rotating shaft 3 is inserted in the middle of the cylinder body 2, a swash plate 4 is fixed in the outer shell 1, a plurality of plungers 5 which are uniformly distributed on the circumference are arranged in the cylinder body 2, one end of an inclined surface of the swash plate 4 faces the plungers 5, an annular chute 6 is arranged on the swash plate 4, a spring 7 is connected between each plunger 5 and the cylinder body 2, and the end of each plunger 5 is always positioned in the annular chute 6 under the action of the spring 7. In the course of the work, drive arrangement drives cylinder block 2 through pivot 3 and rotates, and then cylinder block 2 can drive plunger 5 and rotate together, cylinder block 2 rotates the in-process, plunger 5 can rotate 4 swash plates relatively, because the existence on swash plate 4 inclined plane, in the course of the work, along with plunger 5 and the different position contact on inclined plane, can realize plunger 5's reciprocating motion, and through the effect of spring 7, make plunger 5's one end contact with swash plate 4 all the time, avoid producing error and great impact because of the clearance.

In order to enable the contact between the plunger 5 and the swash plate 4 to be more stable, the spherical head 8 is arranged at the end of the plunger 5, the spherical head 8 is connected with the plunger 5 in a spherical hinge mode, the section of the annular chute 6 is a spherical surface, the outer surface of the spherical head 8 is always in contact with the side wall of the annular chute 6, and through the design of the spherical head 8, the spherical head 8 can be in contact with the swash plate 4 better through rotation in the using process, so that the motion stability of the plunger 5 is guaranteed.

In order to realize the installation of the spherical head 8, the end of the plunger 5 is provided with a spherical installation part for installing the spherical head 8, the side wall of the spherical installation part is provided with a buffer layer 9, as shown in figure 5, the spherical head 8 is connected with the spherical installation part through a spherical hinge, and by designing the buffer layer 9, the impact force between the spherical head 8 and the plunger 5 can be reduced, and the service lives of a rod of the plunger 5 and the spherical head 8 are prolonged. In addition, in order to further prolong the service life of the spherical head 8, the wear-resistant layer 10 is arranged on the side wall of the annular chute 6, so that the wear of the swash plate 4 can be reduced in the use process, and the risks of unstable motion and unbalanced flow of the plunger 5 caused by the fit clearance between the swash plate 4 and the plunger 5 due to the wear are avoided.

According to the invention, the valve plate 11 is arranged in the outer shell 1, the valve plate 11 is connected with the cylinder body 2 in a sealing manner, the valve plate 11 is provided with the waist-shaped feeding hole 12 and the waist-shaped discharging hole 13, and the feeding hole 12 and the discharging hole 13 are symmetrically arranged, so that intermittent feeding and discharging are realized along with the movement of the plunger 5 and the matching of the valve plate as shown in the attached drawing.

The number of the plungers 5 in the invention is 3, 4, 5 or 6, and in the actual production process, different numbers of plungers 5 can be designed according to requirements to achieve different flow effects.

The maximum moving range of the plunger 5 is 5-8cm, the moving range of the plunger 5 is not easy to be overlarge, and the requirement for flow stability can be better met due to smaller formation.

While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.

Claims

1. The utility model provides a small flow rotary plunger pump, its characterized in that, includes the shell body, be equipped with rotatable cylinder body in the shell body, the middle part interlude of cylinder body has the pivot, the inside of shell body is fixed with the sloping cam plate, be equipped with the plunger of a plurality of circumference equipartitions in the cylinder body, the inclined plane one end orientation of sloping cam plate the plunger, annular spout, every have been seted up on the sloping cam plate be connected with the spring between plunger and the cylinder body, the end of plunger is located all the time under the effect of spring in the annular spout, the end of plunger is equipped with spherical head, be equipped with the valve plate in the shell body.

2. A micro flow rotary plunger pump as claimed in claim 1, wherein the spherical head is connected with the plunger by a spherical hinge, the section of the annular chute is a spherical surface, and the outer surface of the spherical head is always in contact with the side wall of the annular chute.

3. A micro flow rotary plunger pump as claimed in claim 2, wherein the plunger has a spherical mounting portion at its end for mounting the spherical head, and a buffer layer is provided on the side wall of the spherical mounting portion.

4. A micro flow rotary piston pump as claimed in claim 2 wherein the side walls of said annular chute are provided with a wear resistant layer.

5. The micro-flow rotary plunger pump according to claim 1, wherein the port plate is hermetically connected with the cylinder body, the port plate is provided with a waist-shaped feed port and a discharge port, and the feed port and the discharge port are symmetrically arranged.

6. A micro flow rotary piston pump in accordance with claim 1, wherein the number of the pistons is 3, 4, 5 or 6.

7. A micro flow rotary piston pump in accordance with claim 1, wherein the maximum movement range of the piston is 5-8 cm.