CN212318569U

CN212318569U - End face sealing device for ball cage coupler

Info

Publication number: CN212318569U
Application number: CN202021139398.4U
Authority: CN
Inventors: 魏巍; 冯卫国; 刘明云; 庄素文
Original assignee: XIANGYANG YUQING TRANSMISSION TECHNOLOGY CO LTD
Current assignee: XIANGYANG YUQING TRANSMISSION TECHNOLOGY CO LTD
Priority date: 2020-06-18
Filing date: 2020-06-18
Publication date: 2021-01-08
Anticipated expiration: 2030-06-18

Abstract

A end face sealing device for a ball cage coupler is characterized in that a flange outer sleeve, a retainer, steel balls and an inner sleeve shaft form a single-joint ball cage coupler, a convex spigot is arranged on the right end face of the flange outer sleeve, a concave large spigot matched with the convex spigot is arranged on the left end face of a gland, a concave small spigot is arranged on the right end face of the gland, a mechanical sealing sleeve is arranged between the flange outer sleeve and the gland, the large end face of the mechanical sealing sleeve is fixed between the convex spigot of the flange outer sleeve and the large spigot of the gland, two small port parts formed by bending a central hole to the left side and the right side are in interference fit with the inner sleeve shaft, the radius of the bending radian of the small port part on the left side is smaller than that of the bending radian of the small port part on the; the large end face of the rubber sealing sleeve is fixed in a small spigot at the other end of the gland, and the small spigot part is fastened in the annular groove of the inner sleeve ring through a clamp; the environmental adaptability and the reliability of the ball cage coupler are improved.

Description

End face sealing device for ball cage coupler

Technical Field

The utility model relates to a face seal device for ball cage shaft coupling.

Background

The end face seal of the existing ball cage coupler generally adopts a seal sleeve made of chloroprene rubber, one end of the seal sleeve is fixed on the end face of an outer sleeve of the ball cage coupler through a gland screw, and the other end of the seal sleeve is fixed on an inner sleeve shaft of the ball cage coupler through a small hoop. Under the good condition of ball cage shaft coupling operational environment, can preserve the grease, prevent that external dust from getting into inside the ball cage shaft coupling body. However, in downhole operation and severe environments such as moisture and corrosion, the situations of sealing damage, grease leakage and the like are easy to occur, so that the inside of the coupler is lack of lubrication, the service life of the coupler is shortened, and soil pollution and water pollution are caused. Particularly, when the petroleum machinery is used for field drilling operation, the traditional sealing structure is difficult to meet the use requirement of the ball cage coupler under the severe working condition.

Disclosure of Invention

The utility model is novel in order to overcome above-mentioned prior art not enough to a terminal surface sealing device for ball cage shaft coupling is provided, improves ball cage shaft coupling's environmental suitability and reliability.

The technical scheme of the utility model is that: a end face sealing device for a ball cage coupler is characterized in that a flange outer sleeve, a retainer, steel balls and an inner sleeve shaft form a single-joint ball cage coupler, a convex spigot is arranged on the right end face of the flange outer sleeve, a concave large spigot matched with the convex spigot is arranged on the left end face of a gland, a concave small spigot is arranged on the right end face of the gland, a mechanical sealing sleeve is arranged between the flange outer sleeve and the gland, the large end face of the mechanical sealing sleeve is fixed between the convex spigot of the flange outer sleeve and the large spigot of the gland, two small port parts formed by bending a central hole to the left side and the right side are in interference fit with the inner sleeve shaft, the radius of the bending radian of the small port part on the left side is smaller than that of the bending radian of the small port part on the; the large end face of the rubber sealing sleeve is fixed in a small spigot at the other end of the gland, and the small spigot part is fastened in the annular groove of the inner sleeve ring through a clamp.

The cross section of one side of the mechanical sealing sleeve is herringbone.

The large end face of the rubber sealing sleeve, the gland, the large end face of the mechanical sealing sleeve and the corresponding part of the flange outer sleeve are provided with threaded holes and are fastened through bolts and gaskets.

The radius of the circle where the small port part at the left side is bent is 25mm, and the radius of the circle where the small port part at the right side is bent is 15 mm.

The utility model discloses set up chevron shape mechanical seal cover between big tang of gland and overcoat terminal surface, constitute the combined end face sealing device with the rubber seal cover of the little tang face of gland, differentiate and only by the function such as grease leakage prevention that the rubber seal cover has, waterproof, dustproof and prevent that the foreign matter collides with, the mechanical seal cover can effectively solve the problem that grease outwards leaked from terminal surface and hold-down bolt hole position in the moist environment in the pit, prevent water pollution and soil pollution; the rubber sealing sleeve has the functions of preventing water, dust and foreign matter collision and the like.

The utility model provides high ball cage shaft coupling's environmental suitability and reliability reduce the work failure of ball cage shaft coupling under the abominable operating mode such as humidity, in the pit, and then protection soil and water resource.

Drawings

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

FIG. 2 is a schematic view of a chevron seal configuration.

Fig. 3 is a schematic structural view of the inner sleeve.

Detailed Description

In fig. 1, the flange outer sleeve 1, the retainer 2, the steel ball 3 and the inner sleeve shaft 10 of the utility model form a single-joint ball cage coupling, and the mechanical seal sleeve 4, the rubber seal sleeve 6 and the gland 5 form a combined end face sealing device. The right end face of the flange outer sleeve 1 is provided with a convex spigot, the left end face of the gland 5 is provided with a concave big spigot matched with the convex spigot, the right end face is provided with a concave small spigot, the big end face of the mechanical seal sleeve 4 is fixed between the end face of the flange outer sleeve 1 and the big spigot of the gland 5, two small end parts formed by bending the central hole towards the left side and the right side are in interference fit with the inner sleeve shaft 10, the big end face of the rubber seal sleeve 6 is fixed in the small spigot on the other end face of the gland, and the small end parts of the rubber seal sleeve 6 are fastened on the inner sleeve shaft. The large end face of the rubber sealing sleeve 6, the gland 5, the large end face of the mechanical sealing sleeve 4 and the corresponding part of the flange outer sleeve 1 are provided with threaded holes, and the rubber sealing sleeve 6, the gland 5 and the mechanical sealing sleeve 4 are connected with the flange outer sleeve 1 through bolts 8 and gaskets 9.

In fig. 2, the outer diameter of the large end face of the mechanical seal sleeve 4 is matched with the outer diameter of the male spigot, the radius of the circle where the curvature of the left small port part of the mechanical seal sleeve 4 is smaller than the radius of the circle where the curvature of the right small port part is, when the radius of the circle where the curvature of the left small port part is 25mm and the radius of the circle where the curvature of the right small port part is 15mm, the sealing effect is better; the cross section of one side of the mechanical sealing sleeve 4 is herringbone.

In fig. 3, the small port of the rubber sealing sleeve 6 is fastened in the annular groove of the inner sleeve shaft 10 by a hoop 7, the annular groove is arranged to ensure that the rubber sealing sleeve 6 is more reliably fastened and sealed, the path of water permeating from the gap between the rubber sealing sleeve 6 and the inner sleeve shaft 10 is changed, and the water can be effectively prevented from permeating.

Claims

1. The utility model provides an end face seal device for ball cage shaft coupling, flange overcoat (1), holder (2), steel ball (3), inner sleeve axle (10) constitute a single section ball cage shaft coupling, its characterized in that: the flange sealing sleeve is characterized in that a convex spigot is arranged on the right end face of the flange outer sleeve (1), a concave large spigot matched with the convex spigot is arranged on the left end face of the gland (5), a concave small spigot is arranged on the right end face, a mechanical sealing sleeve (4) is arranged between the flange outer sleeve (1) and the gland (5), the large end face of the mechanical sealing sleeve (4) is fixed between the convex spigot of the flange outer sleeve (1) and the large spigot of the gland (5), two small port parts formed by bending the central hole to the left and right sides are in interference fit with an inner sleeve shaft (10), the radius of the bending radian of the small port part on the left side is smaller than that of the bending radian of the small port part on the right side, and the outer diameter of the large end face of the; the large end face of the rubber sealing sleeve (6) is fixed in a small spigot at the other end of the gland (5), and the small spigot part is fastened in an annular groove of the inner sleeve shaft (10) through a hoop (7).

2. A face seal arrangement for a ball and cage coupling as set forth in claim 1 wherein: the cross section of one side of the mechanical sealing sleeve (4) is herringbone.

3. A face seal arrangement for a ball and cage coupling as set forth in claim 1 wherein: the large end face of the rubber sealing sleeve (6), the gland (5), the large end face of the mechanical sealing sleeve (4) and the corresponding part of the flange outer sleeve (1) are provided with threaded holes and are fastened through bolts (8) and gaskets (9).

4. A face seal arrangement for a ball and cage coupling as set forth in claim 1 wherein: the radius of the circle where the small port part at the left side is bent is 25mm, and the radius of the circle where the small port part at the right side is bent is 15 mm.