CN201013898Y

CN201013898Y - Squeezing type sealed ring

Info

Publication number: CN201013898Y
Application number: CNU2007201405617U
Authority: CN
Inventors: 董国惠
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-03-16
Filing date: 2007-03-16
Publication date: 2008-01-30
Anticipated expiration: 2017-03-16

Abstract

An extruding sealing ring mainly aims at solving the problem of the poor sealing effect of an 'O'-typed rubber ring on a reduction gearbox of a prior oil pumping machine, characterized in that: an inner wall and an outer wall of an inner ring (1) are respectively a cylindrical surface and a cone surface, an inner wall and an outer wall of an outer ring (2) are respectively a cone surface and a cylindrical surface, and the taper of the cone surface of the outer wall of the inner ring (1) is the same as the taper of the cone surface of the inner wall of the outer ring (2). The extruding sealing ring is characterized by good sealing effect and easy replacement.

Description

Extrusion type sealed circle

Technical field:

The utility model relates to the seal ring on the oil pumping unit reduction gearbox in the oil recovery field, oil field, especially extrusion type sealed circle.

Background technique:

In oil recovery field, oil field, beam pumping unit generally adopts, the Power Train of this pumping unit is made up of motor, speed reducer, crank, connecting rod and walking beam, speed reducer shaft seal on the present this pumping unit is to adopt common " O " type rubber ring, because " O " type rubber ring can not be adjusted, during speed reducer work, axle and the friction of " O " type rubber ring, " O " type rubber ring is easy to damage and produces leakage, and sealing effect is poor.In addition, need dismantle lower crank and open speed reducer when " O " type of replacing rubber ring, waste time and energy, therefore, people usually cut off replacing with " O " type rubber ring, and this mode more is easy to generate leakage.

The model utility content:

In order to overcome the deficiency of " O " type seal with elastometic washer weak effect on the existing oil pumping unit reduction gearbox, the utility model provides a kind of extrusion type sealed circle, and this extrusion type sealed circle has good sealing effect, changes characteristics easily.

The technical solution of the utility model is: this extrusion type sealed circle comprises inner ring and outer ring, the inside and outside wall of inner ring is respectively cylndrical surface and conical surface, the inside and outside wall of outer ring is respectively conical surface and cylndrical surface, and the tapering of the outer wall conical surface of inner ring is identical with the tapering of the circular conical surface of inner wall of outer ring.

The material of above-mentioned inner ring is a rubber, and the material of outer ring is a polyurethane; All have diagonal cut joint in the same way on the sidewall of inner ring and outer ring.

The utlity model has following beneficial effect: owing to take such scheme, inner ring is enclosed within on the speed reducer axle, the outer ring is pressed on the inner ring and is compressed by end cap then, good sealing effect, as damaging, change with the inner ring and the outer ring of band diagonal cut joint, stagger in the diagonal cut joint place of inner ring and outer ring, can not produce leakage after being compressed by end cap, it is convenient to change.

Description of drawings:

Accompanying drawing 1 is a structure sectional view of the present utility model.

1-inner ring among the figure, 2-outer ring, 3-diagonal cut joint.

Embodiment:

The utility model is described in further detail below in conjunction with accompanying drawing:

By shown in Figure 1, this extrusion type sealed circle comprises inner ring 1 and outer ring 2, the inside and outside wall of inner ring 1 is respectively cylndrical surface and conical surface, and the inside and outside wall of outer ring 2 is respectively conical surface and cylndrical surface, and the tapering of the outer wall conical surface of inner ring 1 is identical with the tapering of the circular conical surface of inner wall of outer ring 2.The material of inner ring 1 is a rubber, and better seal is arranged between the axle, and the material of outer ring 2 is a polyurethane, and is not unsmooth when outer ring 2 is pressed into, and is easy to compress; All have diagonal cut joint 3 in the same way on the sidewall of inner ring 1 and outer ring 2, mainly when changing inner ring 1 and outer ring 2, use, diagonal cut joint 3 during installation on inner ring 1 and the outer ring 2 staggers, good sealing effect, it is convenient to change, do not adopt the inner ring 1 and the outer ring 2 that have diagonal cut joint 3 when overhaul, and adopt all-in-one-piece inner ring 1 and outer ring 2, sealing effect is better.

Claims

1. extrusion type sealed circle, comprise inner ring (1) and outer ring (2), it is characterized in that: the inside and outside wall of inner ring (1) is respectively cylndrical surface and conical surface, the inside and outside wall of outer ring (2) is respectively conical surface and cylndrical surface, and the tapering of the outer wall conical surface of inner ring (1) is identical with the tapering of the circular conical surface of inner wall of outer ring (2).

2. extrusion type sealed circle according to claim 1 is characterized in that: the material of inner ring (1) is a rubber, and the material of outer ring (2) is a polyurethane.

3. extrusion type sealed circle according to claim 1 is characterized in that: all have diagonal cut joint (3) in the same way on the sidewall of inner ring (1) and outer ring (2).