CN216078282U

CN216078282U - Mechanical seal capable of moving axially and radially simultaneously

Info

Publication number: CN216078282U
Application number: CN202023274432.1U
Authority: CN
Inventors: 张思哲; 张茂旺; 漆为民
Original assignee: Shanghai Chuangyi Fluid Machine Co ltd
Current assignee: Shanghai Chuangyi Fluid Machine Co ltd
Priority date: 2020-12-30
Filing date: 2020-12-30
Publication date: 2022-03-18
Anticipated expiration: 2030-12-30

Abstract

The utility model discloses a mechanical seal capable of simultaneously moving axially and radially, which comprises a rotating shaft, wherein a limiting key is arranged on the outer surface of the top of the rotating shaft, the limiting key comprises an upper limiting position and a lower limiting position, a shaft sleeve is sleeved outside the rotating shaft, a copper sleeve a and a copper sleeve b are respectively arranged at two end parts of the shaft sleeve, the copper sleeve a and the copper sleeve b are respectively positioned at the top of the rotating shaft and the bottom of the rotating shaft, a flange is fixedly arranged at the outer side of the shaft sleeve, and a corrugated pipe compensator is also arranged at the bottom end part of the shaft sleeve and at the outer side of the bottom end of the rotating shaft. According to the utility model, two groups of copper sleeves are respectively fixed at two ends of the shaft sleeve, so that softer copper and harder copper can rub against each other, the rotating shaft can normally run without damaging the copper sleeves, the running period of the mechanical seal is greatly prolonged, a large amount of running cost is saved, the problem of axial movement is solved by arranging the copper sleeves, and the axial and radial movement can be realized simultaneously.

Description

Mechanical seal capable of moving axially and radially simultaneously

Technical Field

The utility model relates to the field of mechanical seal, in particular to a mechanical seal capable of moving axially and radially simultaneously.

Background

The mechanical seal is a device for preventing fluid leakage, which is formed by at least one pair of end faces perpendicular to the rotation axis, and the end faces are kept in fit and relatively slide under the action of fluid pressure and the elastic force (or magnetic force) of a compensation mechanism and the cooperation of an auxiliary seal.

The rotating shaft of the mechanical seal of the filtering washing dryer in the pharmaceutical industry needs to move axially (lift and descend) while rotating, so that the inner hole of the shaft sleeve of the mechanical seal needs to rub with the shaft in a reciprocating manner, and the stainless steel shaft sleeve and the shaft rub against each other to cause damage, which is not beneficial to the operation and maintenance of equipment.

SUMMERY OF THE UTILITY MODEL

The utility model solves the technical problem of overcoming the defects of the prior art and provides a mechanical seal capable of simultaneously moving in the axial direction and the radial direction.

In order to solve the technical problems, the utility model provides the following technical scheme:

the utility model provides a mechanical seal capable of simultaneously moving axially and radially, which comprises a rotating shaft, wherein a limiting key is arranged on the outer surface of the top of the rotating shaft, the limiting key comprises an upper limiting position and a lower limiting position, a shaft sleeve is sleeved outside the rotating shaft, a copper sleeve a and a copper sleeve b are respectively arranged at two end parts of the shaft sleeve, the copper sleeve a and the copper sleeve b are respectively positioned at the top of the rotating shaft and the bottom of the rotating shaft, a flange is fixedly arranged at the outer side of the shaft sleeve, and a corrugated pipe compensator is also arranged at the bottom end part of the shaft sleeve and at the outer side of the bottom end of the rotating shaft.

Compared with the prior art, the utility model has the following beneficial effects:

according to the utility model, two groups of copper sleeves (namely the copper sleeve a and the copper sleeve b) are respectively fixed at two ends of the shaft sleeve, so that softer copper is rubbed with a harder shaft, the shaft can normally run without damaging the copper sleeves, the running period of the mechanical seal is greatly improved, the axial movement of the shaft is solved by arranging the copper sleeves, the simultaneous axial and radial movement of the mechanical seal and the shaft can be realized, the running period of the mechanical seal is greatly improved, and a large amount of running cost is saved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the principles of the utility model and not to limit the utility model. In the drawings:

FIG. 1 is a block diagram of the present invention;

in the figure: 1. a rotating shaft; 2. a limiting key; 21. an upper limit position; 22. a lower limit position; 3. a lower limit key; 4. a shaft sleeve; 5. a copper sleeve a; 6. a copper sleeve b; 7. a flange; 8. a bellows compensator.

Detailed Description

The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation. Wherein like reference numerals refer to like parts throughout.

In addition, if a detailed description of the known art is not necessary to show the features of the present invention, it is omitted. It should be noted that the terms "front," "back," "left," "right," "upper" and "lower" used in the following description refer to directions in the drawings, and the terms "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.

Example 1

Referring to fig. 1, the present invention provides a mechanical seal capable of moving axially and radially simultaneously, which includes a rotating shaft 1, a limit key 2 is disposed on an outer surface of a top portion of the rotating shaft 1, the limit key includes an upper limit position 21 and a lower limit position 22, a shaft sleeve 4 is sleeved outside the rotating shaft 1, a copper bush a5 and a copper bush b6 are respectively mounted at two end portions of the shaft sleeve 4, the copper bush a5 and the copper bush b6 are respectively located at the top portion of the rotating shaft 1 and at the bottom portion of the rotating shaft 1, a flange 7 is fixedly mounted at an outer side of the shaft sleeve 4, and a bellows compensator 8 is further mounted at a bottom end portion of the shaft sleeve 4 and at an outer side of a bottom end of the rotating shaft 1.

The rotating shaft 1 is connected with a base through a corrugated pipe compensator 8 to complete axial sealing.

The rotating shaft 1 is fixedly provided with a mechanical sealing structure through a flange 7.

The upper limit position 21 and the lower limit position 22 represent the upper and lower movement limits of the upper key of the limit key 2, respectively.

Furthermore, two groups of copper sleeves (namely the copper sleeve a5 and the copper sleeve b6) are arranged and fixed at two ends of the shaft sleeve 4 respectively, so that softer copper and harder copper can rub against each other, the rotating shaft 1 can normally operate without damaging the copper sleeves, the axial movement of the rotating shaft is solved by the arrangement of the copper sleeves, the simultaneous axial and radial movement of the mechanical seal and the shaft can be realized, the operation period of the mechanical seal is greatly prolonged, and a large amount of operation cost is saved.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the utility model. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a can axial and radial simultaneous movement's mechanical seal, includes pivot (1), its characterized in that, be provided with spacing key (2) on the top surface of pivot (1), spacing key contains upper limit position (21) and lower limit position (22), axle sleeve (4) have been cup jointed to the outside of pivot (1), copper sheathing a (5) and copper sheathing b (6) are installed respectively to the both ends of axle sleeve (4), copper sheathing a (5) and copper sheathing b (6) are located the top of pivot (1) and the bottom of pivot (1) respectively, the outside fixed mounting of axle sleeve (4) has flange (7), bellows compensator (8) are still installed to the bottom portion of axle sleeve (4) and the bottom outside that is located pivot (1).