CN217462504U

CN217462504U - Eccentric shaft channel of double-end plunger pump body

Info

Publication number: CN217462504U
Application number: CN202220942691.7U
Authority: CN
Inventors: 陈浩; 余刚
Original assignee: Suzhou Xiaoke Cleaning Technology Co ltd
Current assignee: Suzhou Xiaoke Cleaning Technology Co ltd
Priority date: 2022-04-22
Filing date: 2022-04-22
Publication date: 2022-09-20
Anticipated expiration: 2032-04-22

Abstract

The utility model discloses an eccentric shaft passageway of the double-end plunger pump body, it is crossing perpendicularly to perforate with the plunger, and crossing department is equipped with the spacing limit structure of base bearing axial, and the eccentric shaft passageway has unified internal diameter, limit structure is for setting up the discontinuous step on eccentric shaft passageway inner wall, can carry out the axial to the base bearing spacing. The eccentric shaft channel structure aims to eliminate a large-diameter section structure and a small-diameter section structure which are designed for axially limiting the main bearing in the prior art, and provides a larger space for the rotation of the eccentric bearing so as to improve the water pumping quantity of the plunger.

Description

Eccentric shaft channel of double-end plunger pump body

Technical Field

The utility model relates to a high pressure cleaner, concretely relates to high pressure cleaner's plunger pump.

Background

The double-end plunger pump comprises a pump body provided with a plunger through hole, a plunger matched in the plunger through hole, an eccentric bearing matched with the middle part of the plunger, and an eccentric shaft matched with the eccentric bearing, wherein the eccentric shaft is driven by a motor through a speed reducer. Plunger chamber covers are respectively installed on two sides of the pump body, each plunger chamber cover and the pump body form a plunger chamber, and two ends of the plunger are respectively located in the two plunger chambers. The plunger cavity is provided with a first type of one-way valve connected with the upper water inlet channel of the pump body, and the plunger cavity is provided with a second type of one-way valve connected with the upper water outlet channel of the pump body. Under the drive of the motor, the eccentric shaft drives the plunger piston to do reciprocating linear motion, under the action of the motion of the plunger piston, external water enters the cavity of the plunger piston through the water inlet channel, is pressurized and then is sprayed out through the water outlet channel.

The pump body is designed with an eccentric shaft channel, and the eccentric shaft passes through the eccentric shaft channel and transmits power to the eccentric bearing and the plunger. To stabilize the eccentric shaft, a main bearing (possibly more than one) is mounted between the eccentric shaft channel and the eccentric shaft. If the eccentric bearing is arranged at the front end of the eccentric shaft, a main bearing (front main bearing for short) positioned at the forefront of the eccentric shaft needs a limiting step to limit the axial direction of the main bearing. The limiting step is arranged on the inner wall of the eccentric shaft channel, the eccentric shaft channel is designed into a large-diameter section and a small-diameter section according to the prior art, the front main bearing is positioned in the large-diameter section, and the front end of the front main bearing is abutted against the limiting step formed by the large-diameter section and the small-diameter section. The small diameter section is vertically penetrated by the plunger perforation, the eccentric bearing is positioned at the intersection of the plunger perforation and the small diameter section, and the diameter of the maximum excircle movement track formed by the rotation motion of the outer ring of the eccentric bearing around the eccentric axis (set as the diameter of the gyration containing cavity of the eccentric bearing) cannot be larger than the inner diameter of the small diameter section due to the limitation of the size of the inner diameter of the small diameter section, otherwise, the diameter will interfere with the inner wall of the small diameter section. Therefore, the outer diameter of the front main bearing is larger than the diameter of the maximum excircle movement track formed by the rotation motion of the eccentric bearing outer ring around the eccentric axis.

SUMMERY OF THE UTILITY MODEL

The utility model solves the technical problem that: on the premise that the overall size of the double-head plunger pump is not changed, the water pumping quantity of the double-head plunger pump is increased.

In order to solve the technical problem, the utility model provides a following technical scheme: the eccentric shaft channel of the double-head plunger pump body is vertically intersected with the plunger through hole, a limiting structure for axially limiting the main bearing is arranged at the intersection, the eccentric shaft channel has a uniform inner diameter, the limiting structure is a discontinuous step arranged on the inner wall of the eccentric shaft channel, and the diameter of a gyration containing cavity of the eccentric bearing is equal to or smaller than the outer diameter of the main bearing.

The discontinuous steps are equivalent to a plurality of convex structures arranged on the inner wall of the eccentric shaft channel, and can axially limit the main bearing.

Because the eccentric shaft channel has a uniform inner diameter, the large-diameter section and the small-diameter section are not distinguished any more, so the outer diameter of the main bearing positioned at the rear side of the non-continuous step can be equal to the diameter of the maximum excircle movement track formed by the rotary motion of the outer ring of the eccentric bearing positioned at the front side of the non-continuous step around the eccentric axis. So, compare in prior art, under the unchangeable prerequisite of double-end plunger pump overall dimension, the diameter (eccentric bearing gyration appearance chamber diameter) of the biggest excircle movement track that the eccentric bearing outer lane constitutes around eccentric axis rotary motion has grown, and the linear reciprocal range grow of plunger, and then the pump water yield of double-end plunger pump has promoted.

Eccentric shaft channel structure, aim at canceling prior art eccentric shaft channel and for the big footpath section and the path section structure that the spacing base bearing of axial designed, provide bigger space for eccentric bearing's rotation to promote the pump water yield of plunger.

Drawings

The invention will be further explained with reference to the drawings:

FIG. 1 is a schematic view of a dual head plunger pump body;

FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;

fig. 3 is a schematic view of the structure of the double-headed plunger pump body combined with the eccentric shaft 31, the main support bearing 30, the eccentric bearing 32, the plunger 21, and the plunger chamber cover 51;

fig. 4 is a sectional view taken along line B-B in fig. 3.

The symbols in the drawings illustrate that:

10. an eccentric shaft channel; 20. perforating a plunger; 21. a plunger; 30. a main bearing; 31. an eccentric shaft; 32. an eccentric bearing; 40. a non-continuous step; 50. a double-headed plunger pump body; 51. a plunger chamber cover.

Detailed Description

Referring to fig. 2 and 4, the eccentric shaft channel of the double-headed plunger pump body is perpendicularly intersected with the plunger through hole 20, a limiting structure for axially limiting the main bearing 30 is arranged at the intersection, the eccentric shaft channel 10 has a uniform inner diameter, the limiting structure is a discontinuous step 40 arranged on the inner wall of the eccentric shaft channel, and the diameter of the gyration accommodating cavity of the eccentric bearing is equal to or smaller than the outer diameter of the main bearing.

Alternatively, when the diameter of the eccentric bearing gyration accommodating cavity is smaller than the outer diameter of the main bearing, the difference between the diameter of the eccentric bearing gyration accommodating cavity and the outer diameter of the main bearing is within 2 mm.

During actual installation, the plunger 21 is installed in the plunger through hole 20 and is matched with the eccentric shaft 31 and the eccentric bearing 32, and the eccentric bearing 32 enters from the eccentric shaft channel 10 and is matched with the installation groove formed in the middle of the plunger after passing through the discontinuous step 40. The main bearing 30 is matched on the eccentric shaft 31 and is abutted against the discontinuous step 40, and the discontinuous step axially limits the main bearing.

Alternatively, the discontinuous step 40 comprises two steps, the two steps are oppositely arranged, and any one step vertically passes through a plane where the central line of the eccentric shaft channel and the central line of the plunger through hole are located. And setting the plane of the central line of the eccentric shaft channel and the central line of the plunger through hole as a C plane, wherein the discontinuous step 40 is positioned at the intersection of the C plane and the plunger through hole 20.

The rear face of the non-continuous step 40 can abut against the main bearing 30 to axially limit the main bearing. The front face of the non-continuous step follows the inner edge of the plunger bore 20 and provides radial support for the plunger 21.

The above description is only for the preferred embodiment of the present invention, and for those skilled in the art, there are variations on the detailed description and the application scope according to the idea of the present invention, and the content of the description should not be construed as a limitation to the present invention.

Claims

1. The eccentric shaft passageway of double-end plunger pump body, it is crossing perpendicularly with plunger perforation (20), crossing department is equipped with the limit structure to main bearing (30) axial spacing, its characterized in that: the eccentric shaft channel (10) is provided with a uniform inner diameter, the limiting structure is a non-continuous step (40) arranged on the inner wall of the eccentric shaft channel, and the diameter of the eccentric bearing gyration containing cavity is equal to or less than the outer diameter of the main bearing.

2. The eccentric shaft passage of the double-headed plunger pump body according to claim 1, wherein: the non-continuous step (40) comprises two sections of steps which are arranged oppositely, and any one section of step vertically penetrates through a plane where the central line of the eccentric shaft channel and the central line of the plunger through hole are located.

3. The eccentric shaft passage of the double-headed plunger pump body according to claim 2, wherein: the rear face of the discontinuous step (40) can be abutted against the main bearing (30), and the front face of the discontinuous step is profiled to the inner edge of the plunger through hole (20).