CN212803702U

CN212803702U - Shockproof pump shaft assembly and magnetic pump

Info

Publication number: CN212803702U
Application number: CN202021552713.6U
Authority: CN
Inventors: 吴继泉; 陈明; 吴晓苹; 肖红玲; 李成; 朱永鹏
Original assignee: Yankuang Lunan Chemical Co ltd; Yankuang Group Corp Ltd
Current assignee: Yankuang Lunan Chemical Co ltd; Yankuang Group Corp Ltd
Priority date: 2020-07-30
Filing date: 2020-07-30
Publication date: 2021-03-26
Anticipated expiration: 2030-07-30

Abstract

The utility model relates to a shockproof pump shaft assembly and magnetic drive pump, including the pump shaft, the excircle side cover of pump shaft is equipped with the axle sleeve, is provided with the rubber piston ring between the excircle side of axle sleeve and pump shaft, and the excircle side of rubber piston ring is formed by inner ring surface and extrados combination to make the section profile of rubber piston ring be D-shaped; the side surface of the outer circle of the pump shaft is provided with an annular groove, the inner ring surface of the rubber piston ring is attached to the ring surface of the annular groove, and the outer arc surface of the rubber piston ring protrudes out of the annular groove to provide elastic support for the shaft sleeve. The pump shaft is provided with a cooling flow passage, the cooling flow passage penetrates through the pump shaft along the direction of the central axis of the pump shaft, an oil hole is formed in the outer circle side face of the pump shaft, and the oil hole can communicate the outer circle side face of the pump shaft with the cooling flow passage.

Description

Shockproof pump shaft assembly and magnetic pump

Technical Field

The utility model belongs to the technical field of the magnetic drive pump, concretely relates to shockproof pump shaft assembly and magnetic drive pump.

Background

The shaft sleeve and the shaft are connected into two types in the magnetic pump: a rigid connection, i.e. direct contact between the shaft sleeve and the shaft; the second is a flexible connection, i.e. a metal support piston ring. The piston pump is arranged between a pump shaft and a shaft sleeve by utilizing the principle of elasticity and memory of metal, and an expansion ring drives the shaft sleeve to move together through friction force by means of the elasticity of the expansion ring.

The inventor believes that the pump shaft assembly of the current magnetic pump has the following disadvantages:

1. the metal supporting piston ring is a sheet-shaped object, the processing difficulty is high, higher concentricity cannot be achieved, the degree of fitting with the shaft sleeve is low, and the dynamic balance is poor.

2. The magnetic pump is generally used under the working condition of high temperature and corrosion resistance, the requirement on the material of the shaft sleeve supporting piston ring is particularly high, and the shaft sleeve piston ring is easier to corrode and deposit dirt because the shaft sleeve piston ring is in a running state, particularly the shaft sleeve piston ring is positioned in a narrow space between a shaft sleeve and a shaft. After a period of use, the sleeve support piston ring is invalid.

3. The installation operation is complicated, and the in-process that supports the piston ring at the axle sleeve impress very easily leads to the axle sleeve damaged, simultaneously, in later stage magnetic drive pump maintenance process, dismantles the difficulty, selects to break and tears open and can cause unnecessary maintenance loss.

4. In the rubber piston ring known by the inventor, the rubber piston ring is formed by enclosing three ring surfaces and an outer arc surface, an inner ring surface of the three ring surfaces is attached to an inner ring surface of the annular groove, an outer ring surface of the three ring surfaces is attached to a side ring surface of the annular groove, and the part participating in elastic deformation is only the outer arc surface, so that the annular groove is required to be deep enough, the rubber piston ring cannot provide enough elastic allowance, and the abrasion between the shaft sleeve and the pump shaft is possible.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a shockproof pump shaft assembly and magnetic drive pump can solve one of above-mentioned technical problem at least.

In order to achieve the above object, a first aspect of the present invention provides a shockproof pump shaft assembly, including a pump shaft, wherein a shaft sleeve is sleeved on an outer circumferential side surface of the pump shaft, a rubber piston ring is arranged between the shaft sleeve and the outer circumferential side surface of the pump shaft, and the outer circumferential side surface of the rubber piston ring is formed by combining an inner annular surface and an outer cambered surface, so that a cross-sectional profile of the rubber piston ring is D-shaped;

the side surface of the outer circle of the pump shaft is provided with an annular groove, the inner ring surface of the rubber piston ring is attached to the ring surface of the annular groove, and the outer arc surface of the rubber piston ring protrudes out of the annular groove to provide elastic support for the shaft sleeve.

Further, a cooling flow passage is arranged in the pump shaft, the cooling flow passage penetrates through the pump shaft along the direction of the central axis of the pump shaft, an oil hole is formed in the outer circle side face of the pump shaft, and the oil hole can be communicated with the outer circle side face of the pump shaft and the cooling flow passage.

Furthermore, a second oil hole and a third oil hole are formed in the outer circle side face of the shaft shoulder, and the central axes of the second oil hole and the third oil hole are perpendicular to each other.

A second aspect of the present invention provides a magnetic drive pump, utilizing the anti-vibration pump shaft assembly.

The beneficial effects of one or more of the above technical solutions are as follows:

(1) the utility model discloses with metal piston ring replacement for the rubber piston ring, utilize the elasticity of rubber, can reach better shock attenuation effect.

(2) The rubber processing degree of consistency is high, adopts the rubber piston ring that the section is D shape, and its concentricity compensation is better, has guaranteed the concentricity of pump shaft and axle sleeve after the installation for the operation is more steady, and the vibration is little.

(3) The rubber piston ring is provided with an inner ring surface only on the surface attached to the annular groove, and the other positions are outer arc surfaces, so that the whole rubber piston ring is elastically deformed, larger elastic allowance can be provided, and the direct contact between the shaft sleeve and the pump shaft and the abrasion can be avoided.

(4) The shaft shoulder is provided with the second oil hole and the third oil hole which are vertical to each other, and after one oil hole on the shaft shoulder is blocked, the other oil hole can form a circulating oil path, so that the structure of the pump shaft is optimized, and the cooling effect of the pump shaft assembly is ensured;

drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.

Fig. 1 is a schematic structural view of the overall structure of the embodiment of the present invention after removing the shaft sleeve;

FIG. 2 is a schematic view of a cooling channel disposed in a pump shaft according to an embodiment of the present invention;

fig. 3 is a schematic sectional view of a D-shaped rubber piston ring according to an embodiment of the present invention.

In the figure: 1. a pump shaft; 2. a cooling flow channel; 3. a shaft shoulder; 4. an annular groove; 501. a first oil hole; 502. a second oil hole; 503. a third oil hole; 6. a rubber piston ring; 601. an inner ring surface; 602. an outer arc surface.

Detailed Description

It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

Example 1

As shown in fig. 1-3, a shockproof pump shaft assembly is characterized by comprising a pump shaft 1, wherein a shaft sleeve is sleeved on the outer circumferential side surface of the pump shaft 1, a rubber piston ring 6 is arranged between the shaft sleeve and the outer circumferential side surface of the pump shaft 1, and the outer circumferential side surface of the rubber piston ring 6 is formed by combining an inner annular surface 601 and an outer cambered surface 602, so that the cross-sectional profile of the rubber piston ring 6 is in a D shape;

the side surface of the excircle of the pump shaft 1 is provided with an annular groove 4, the inner ring surface 601 of the rubber piston ring 6 is attached to the ring surface of the annular groove 4, and the outer arc surface 602 of the rubber piston ring 6 protrudes out of the annular groove 4 so as to provide elastic support for the shaft sleeve.

The pump shaft is characterized in that a cooling flow passage 2 is arranged in the pump shaft 1, the cooling flow passage 2 penetrates through the pump shaft 1 along the direction of the central axis of the pump shaft 1, an oil hole is formed in the outer circle side face of the pump shaft 1, and the oil hole can be communicated with the outer circle side face of the pump shaft 1 and the cooling flow passage 2. The two ends of the cooling flow channel 2 are respectively provided with an oil inlet and an oil outlet, the oil inlet is used for being communicated with a liquid supply pipeline, and the oil outlet is used for being communicated with a liquid return pipeline. The central axis of the oil hole is vertical to the central axis of the pump shaft 1.

It is understood that the cooling flow channels in this embodiment are generally circular in cross-section, but in other embodiments, the cooling flow channels may take the form of square or other regular polygonal configurations, which may be configured by one skilled in the art.

The pump shaft comprises a pump shaft 1 and is characterized in that a shaft shoulder 3 is arranged in the pump shaft 1, two sides of the shaft shoulder 3 are respectively sleeved with a shaft sleeve, and the surface of the pump shaft 1 is provided with a first oil hole 501 at the position matched with the shaft sleeves.

The outer circle side surface of the shaft shoulder 3 is provided with a second oil hole 502 and a third oil hole 503, and the central axes of the second oil hole 502 and the third oil hole 503 are vertical to each other.

And a plurality of rubber piston rings 6 are arranged between each shaft sleeve and the outer circle side surface of the pump shaft 1.

In the present embodiment, as shown in fig. 1, two rubber packing rings are provided at the mounting position of each shaft sleeve, the two rubber packing rings being symmetrical with respect to the shaft sleeve to equally divide the load between the shaft sleeve and the pump shaft; it is understood that in other embodiments, three, four or other numbers of rubber piston rings may be provided at each position of the shaft sleeve, and the number of the rubber piston rings matches with the number of the annular grooves, as long as the design requirements can be met, and the rubber piston rings can be set by a person skilled in the art, and are not described herein again.

In order to adapt to extreme working conditions, such as high temperature and high pressure beyond the normal working range, in the embodiment, the rubber piston ring 6 is made of perfluoro-ether rubber. It can be understood that rubber made of other materials can be adopted under the condition of meeting the use requirement of extreme working conditions, and the rubber can be specifically set by a person skilled in the art, and is not described herein again.

In this embodiment, the material of the shaft sleeve is cemented carbide silicon carbide or graphite. It can be understood that, in other embodiments, the material of the shaft sleeve may be set by a person skilled in the art, as long as the use requirement can be met, and the description is not repeated herein.

The working principle is as follows: when the device is used, the rubber piston ring, the shaft sleeve and other parts are sequentially arranged on the outer circle side surface of the pump shaft, and then the components such as the bearing and the like are arranged.

When the pump shaft assembly is used, the outer arc surface of the rubber piston ring can absorb the load at the shaft sleeve, so that the vibration in the pump shaft assembly is reduced, and the stability of the system is improved. After one of the second oil hole or the third oil hole is blocked, the other oil hole can still play a role in guiding flow, so that cooling liquid can circulate among oil supply parts such as the cooling flow passage, the oil hole and the oil tank.

Example 2

This embodiment provides a magnetic drive pump that utilizes the anti-vibration pump shaft assembly described in embodiment 1.

Although the present invention has been described with reference to the accompanying drawings, it is not intended to limit the scope of the present invention, and those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without inventive work are still within the scope of the present invention.

Claims

1. A shockproof pump shaft assembly is characterized by comprising a pump shaft, wherein a shaft sleeve is sleeved on the outer circle side surface of the pump shaft, a rubber piston ring is arranged between the shaft sleeve and the outer circle side surface of the pump shaft, and the outer circle side surface of the rubber piston ring is formed by combining an inner ring surface and an outer arc surface, so that the section profile of the rubber piston ring is D-shaped;

2. The anti-vibration pump shaft assembly according to claim 1, wherein a cooling flow passage is provided in the pump shaft, the cooling flow passage extends through the pump shaft along a central axis of the pump shaft, and an oil hole is provided in an outer circumferential side surface of a side surface of the pump shaft, and the oil hole can communicate the outer circumferential side surface of the pump shaft with the cooling flow passage.

3. The anti-vibration pump shaft assembly according to claim 2, wherein a shaft shoulder is formed in the pump shaft, a shaft sleeve is respectively sleeved on both sides of the shaft shoulder, and a first oil hole is respectively formed at a position where the surface of the pump shaft is matched with the shaft sleeve.

4. The anti-vibration pump shaft assembly according to claim 3, wherein a second oil hole and a third oil hole are formed in an outer circumferential side surface of the shaft shoulder, and center axes of the second oil hole and the third oil hole are perpendicular to each other.

5. The anti-vibration pump shaft assembly of claim 2, wherein a central axis of the oil bore is perpendicular to a central axis of the pump shaft.

6. The anti-vibration pump shaft assembly according to claim 2, wherein the cooling channel has openings at both ends thereof, namely an oil inlet and an oil outlet, the oil inlet being communicated with a liquid supply pipeline, and the oil outlet being communicated with a liquid return pipeline.

7. The anti-vibration pump shaft assembly according to claim 1, wherein a plurality of said rubber piston rings are disposed between each shaft sleeve and the outer circumferential side of the pump shaft.

8. The anti-seismic pump shaft assembly of claim 1, wherein said rubber piston ring is comprised of a perfluoroether rubber.

9. The anti-vibration pump shaft assembly according to claim 1, wherein the material of the shaft sleeve is cemented carbide silicon carbide or graphite.

10. A magnetic drive pump, characterized in that a vibration-proof pump shaft assembly according to any one of claims 1-9 is used.