KR20170077306A

KR20170077306A - Oil seal for pump

Info

Publication number: KR20170077306A
Application number: KR1020150187044A
Authority: KR
Inventors: 이준기
Original assignee: 수광산업 주식회사; 이준기
Priority date: 2015-12-28
Filing date: 2015-12-28
Publication date: 2017-07-06
Also published as: KR101803774B1

Abstract

The present invention relates to a seal body having a horizontal shaft insertion hole at the center thereof; An annular housing protruding from the left side of the seal body and surrounding bearings axially coupled to the shaft; And a gasket disposed in the insertion hole of the seal body and surrounding the shaft,
Wherein the insertion hole of the seal body is divided into a left side region, an intermediate region and a right side region, an inner flange surrounding the shaft is formed in the left region, a middle space portion formed along the inner circumference of the inner flange is formed in the intermediate region, And an outer space portion having a larger inner diameter than the middle space portion and disposed with the gasket is formed in the right side region of the inner flange, And the fluid discharged through the gap between the shaft and the inner flange is collected to the inside of the housing through the respective flow holes.

Description

Oil seal for pump {OIL SEAL FOR PUMP}

The present invention realizes a housing in which a bearing is housed and a seal body for preventing leakage of fluid, and a separate independent space is formed in the insertion hole of the seal body so that the leaked fluid can be collected, To the inside of the housing through the flow holes.

BACKGROUND ART [0002] With respect to an oil seal for preventing leakage of lubricating oil stored in a housing of a bearing during operation of various rotating machines,

Korean Patent Registration No. 10-0499798 (registered on June 28, 2005) "Oil room" is proposed,

A shaft hole through which the rotating shaft of the annular body passes is made larger in diameter than the diameter of the rotating shaft and an isolating groove is formed on the inner peripheral surface of the shaft hole so that a blocking jaw is formed on the outer side of the main surface of the shaft hole. A lower portion of the inner side cut-off portion of a lower portion of the body when the body is uprighted forms a flow hole communicating a lower portion of the isolation groove and an inner side surface of the body, And a center shaft hole is provided with a shield plate having the same diameter as that of the body. The centrifugal force generated by the centrifugal force generated by the high-speed rotation of the rotary shaft and the bearing causes the lubricant, And is prevented from flowing into the gap between the ball and the rotary shaft, thereby preventing the leakage more effectively.

literature. Korea Patent Registration No. 10-0499798 (registered on June 28, 2005)

In the present invention, a housing in which a bearing is housed, and a seal body for preventing fluid leakage such as lubricating oil are integrally formed, and a shaft inserting hole of a seal body is divided into three regions, And a lubricating oil discharged through a gap between the shaft and the inner flange is refined and collected.

It is another object of the present invention to provide an oil seal for a pump in which lubricating oil collectively collected in the middle space portion can be recovered to the inside of the housing by forming the flow holes in the upper and lower sides of the inner flange.

It is another object of the present invention to provide an oil seal for a pump that simplifies the structure of the oil seal, reduces manufacturing cost, and is easy to replace and repair.

According to an aspect of the present invention, there is provided an oil seal for a pump,

A seal body having a horizontal shaft insertion hole in the center;

An annular housing protruding from the left side of the seal body and surrounding bearings axially coupled to the shaft; And

A gasket disposed in the insertion hole of the seal body and surrounding the shaft;

, &Lt; / RTI >

The insertion hole of the seal body is divided into a left side region, an intermediate region, and a right side region,

An inner flange surrounding the shaft is formed in the left region,

A middle space portion formed along the inner circumferential surface thereof is formed in the intermediate region,

Wherein the right side region is formed along an inner circumferential surface thereof with an outer space portion having an inner diameter larger than that of the middle space portion and in which the gasket is disposed,

Wherein the inner flange is provided with a plurality of through holes that pass through the inside of the housing and the middle space so as to communicate with each other so that fluid flowing out through the gap between the shaft and the inner flange is collected into the inside of the housing through the through holes, .

In the oil seal for a pump according to the present invention,

A seal housing for housing a bearing and a seal body for preventing leakage of a fluid such as a lubricating oil are integrally structured and the shaft insertion hole of the seal body is divided into three areas and the inner flange of the left area and the outer space of the right area There is a great effect that the lubricating oil discharged through the gap between the shaft and the inner flange is refined and collected by forming one middle space defined by the gasket disposed in the portion.

In addition, by forming the flow holes in the upper and lower sides of the inner flange, the lubricating oil collected in the middle space can be recovered to the inside of the housing, and the structure of the oil seal can be simplified to reduce the manufacturing cost and improve the market competitiveness, It is easy to replace and repair parts and the like.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a sectional structural view showing an oil seal for a pump according to the present invention; Fig.
Fig. 2 is a partially left side view of Fig. 1,
3 is a cross-sectional view showing a state in which a pump oil seal according to the present invention is applied to a pump,
Fig. 4 is an enlarged configuration view of "A"

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Prior to this, terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary terms, and the inventor should appropriately interpret the concepts of the terms appropriately It should be interpreted in accordance with the meaning and concept consistent with the technical idea of the present invention based on the principle that it can be defined. Therefore, the embodiments described in the present specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention and are not intended to represent all of the technical ideas of the present invention. Therefore, various equivalents It should be understood that water and variations may be present.

The inner flange side is designated as the left portion or the left side and the outer space portion side is defined as the right portion or the right side with reference to Fig.

1 to 4, in the oil seal for a pump according to the present invention,

A seal body 10, a housing 20, and a gasket 30.

Looking at each configuration,

The seal body (10)

As shown in Figs. 1 and 2,

An insertion hole 11 through which the horizontal shaft 1 passes,

As shown in FIG.

At this time, the insertion hole 11 of the seal body 10 is divided into a left region, an intermediate region, and a right region,

An inner flange 111 surrounding the shaft 1 is formed in the left region,

The middle region is formed with a middle space portion 112 which is recessed along an inner circumferential surface thereof,

The outer space 113 is formed in the right region along the inner circumferential surface thereof and has an inner diameter larger than that of the middle space portion 112 and in which the gasket 30 is disposed.

Particularly, the inner flange 111 is formed with a plurality of through holes 114 through which the inner space of the housing 20 and the middle space 112 communicate with each other.

As shown in FIG. 2, each of the flow holes 114 is disposed at one location on the upper side and two locations on the lower side when the inner flange 111 is viewed from the left.

The seal body 10 is formed with an outer flange 12 extending along the circumference of the seal body 10 and having a plurality of bolt fastening holes 121.

The housing 20

As shown in Figure 1,

And has an annular columnar structure protruding from the left side of the seal body 10 and surrounding bearings 2 axially coupled to the shaft 1.

The gasket (30)

As shown in Figures 1 and 4,

To prevent leakage of the fluid introduced into the insertion hole (11) of the seal body (10) to the outside,

A gasket body 31 of an elastic body disposed in the insertion hole 11 of the seal body 10 and surrounding the shaft 1,

A shrink ring 32 made of a coil spring or the like is inserted into the space recessed to the right along the left periphery of the gasket body 31,

.

According to the use state of the oil seal for a pump according to the present invention,

Although the oil seal of the present invention is generally referred to as a pump for the purpose of illustration, the present invention is not limited to this, but a fluid such as a lubricating oil is accommodated and the shaft is rotated. In order to prevent the leakage of fluid such as lubricating oil It is obvious that the present invention can be applied to various rotating machines.

As in Figure 3, the pump, one of the rotating machines to which the oil seal is applied,

(3) and an impeller housing (4) surrounding the impeller (3)

A shaft housing (5) accommodating a lubricating oil and surrounding a shaft (1) connected to the impeller (3)

A motor (not shown) connected to the right end of the shaft 1 to transmit rotational power to the shaft 1,

And an oil seal of the present invention mounted on the right end of the shaft housing 5. [

The shaft housing 5 has an opening at its right end and the housing 20 is inserted into the opened portion of the shaft housing 5. The shaft 20 is inserted into the shaft 20, Or two or more bearings 2 are accommodated.

A mounting groove 21 is formed on an inner circumferential surface of the housing 20 to receive a snap ring or the like for preventing the bearings 2 from being fixed and separated from the inner circumferential surface of the housing 20 and between the housing 20 and the shaft housing 5 Two or more O-rings or the like for sealing the joint surface are mounted on the outer circumferential surface of the housing 20.

A bolt inserted into each of the fastening holes 121 of the outer flange 12 is inserted into the shaft housing 5 in a state where the outer flange 12 of the seal body 10 is in close contact with the right end of the shaft housing 5, And is fixedly coupled to the shaft housing 5.

4, when the motor 1 rotates or non-rotates the shaft 1, the lubricating oil contained in the shaft housing 5 is introduced into the insertion hole 11 of the shaft 1 and the seal body 10, Even if it flows out through the gap between the shaft 1 and the inner flange 111 of the insertion hole 11, it is collected and accumulated in the middle space portion 112 formed in the intermediate region of the insertion hole 11, Is returned to the housing (20) and the shaft housing (5) through the respective flow holes (114) formed in the inner flange (111) of the insertion hole (11).

The lubricating oil accumulated on the surface of the shaft 1 is scattered by the centrifugal force of the shaft 1 when the shaft 1 rotates and the lubricating oil is scattered by the centrifugal force of the shaft 1 to the right side of the inner flange 111 of the insertion hole 11 The inner circumferential surface of the middle space portion 112 and the left side portion of the gasket 30 or flows into the respective flow holes 114 and is recovered toward the housing 20 and the shaft housing 5 side.

Therefore, leakage of the lubricating oil is prevented primarily through the respective flow holes 114 and the middle space portion 112 formed in the inner flange 111 of the seal body 10, Through the gasket 30, to prevent secondarily.

While the present invention has been described with reference to the accompanying drawings, it is to be understood that the present invention is not limited to the disclosed embodiments, and various changes and modifications may be made by those skilled in the art. The present invention is not limited thereto.

10: Seal body
11: Insertion ball
111: Inner flange
112: middle space section
113: outer space portion
114: Distribution ball
12: Outer flange
121: fastening hole
20: Housing
21: Mounting groove
30: Gasket
31: Gasket body
32: Shrink ring

Claims

A seal body (10) having a central horizontal shaft (1) insertion hole (11);
An annular housing 20 protruding from the left side of the seal body 10 and surrounding the bearings 2 axially coupled to the shaft 1; And
A gasket (30) disposed in the insertion hole (11) of the seal body (10) and surrounding the shaft (1);
, &Lt; / RTI >

The insertion hole 11 of the seal body 10 is divided into a left region, an intermediate region, and a right region,
An inner flange 111 surrounding the shaft 1 is formed in the left region,
The middle region is formed with a middle space portion 112 which is recessed along an inner circumferential surface thereof,
An outer space portion 113 having an inner diameter larger than that of the middle space portion 112 and having the gasket 30 disposed therein is formed in the right region,
The inner flange 111 is formed with a plurality of through holes 114 through which the inner space of the housing 20 and the middle space 112 communicate with each other. 111) is returned to the inside of the housing (20) through the respective flow holes (114).

The method according to claim 1,
Wherein each of the flow holes (114) is disposed at one location on the upper side and two locations on the lower left side when the inner flange (111) is viewed from the left side.

3. The method according to claim 1 or 2,
Wherein the seal body (10) is formed with an outer flange (12) extending along an outer circumferential surface thereof and having a plurality of bolt fastening holes (121).