Mechanical seal sealing structure capable of preventing looseness

Abstract

The utility model discloses an anti-loosening mechanical seal sealing structure which comprises a shaft sleeve, a movable ring is sleeved on the outer surface of the shaft sleeve, a static ring is installed on the inner ring of the movable ring, an anti-rotating pin is installed inside the static ring, a spiral inner sleeve is installed on the bottom face of the anti-rotating pin, and a shell is sleeved on the outer surface of the static ring. The outer surface of the shaft sleeve is sleeved with two first sealing rings, the outer surfaces of the two first sealing rings make contact with the movable ring, and two second sealing rings are placed between the outer ring of the static ring and the inner ring of the shell. The spiral inner sleeve and the anti-rotating pin are installed between the shaft sleeve and the static ring, looseness between the shaft sleeve and the shell can be reduced, the service life of the device can be prolonged, the sealing effect of a mechanical seal sealing structure is achieved, and therefore the problem that due to repeated use of an existing device, the sealing effect is poor is effectively solved through the device. And the device is easy to loosen, so that the sealing structure is loosened.

Description

Technical Field

[0001] This application relates to the field of mechanical seal, and particularly to a mechanical seal structure that prevents loosening. Background Art

[0002] At present, there are many types of mechanical seal devices, and the structures of the assembled type are relatively unified. They mainly consist of four parts: a seal ring, a buffer compensation mechanism, an auxiliary sealing ring, and a transmission mechanism, achieving a certain mechanical seal effect.

[0003] Chinese Patent with Publication No. CN206072349U discloses an assembled mechanical seal structure, including a shaft sleeve, a mechanical seal end cover and a stationary ring seat sleeved on the shaft sleeve, a spring with two ends respectively in contact with the mechanical seal end cover and the stationary ring seat, and a stationary ring clamped on the stationary ring seat. There is a sealing groove between the mechanical seal end cover and the stationary ring seat, and a sealing ring is installed in the sealing groove. The sealing ring seals the spring between the mechanical seal end cover and the stationary ring seat. The axial depth of the sealing groove is greater than the cross-sectional diameter of the sealing ring. However, in the existing device sealing structure, during the use process, due to repeated use, it is easy to cause the device to loosen, thus resulting in the loosening of the sealing structure. Therefore, we propose a mechanical seal structure that prevents loosening to solve the above problems. Utility Model Content

[0004] The purpose of the present utility model is to provide a mechanical seal structure that prevents loosening to solve the problems raised in the above background art.

[0005] The embodiments of this application adopt the following technical solutions:

[0006] A mechanical seal structure that prevents loosening, including a shaft sleeve. A moving ring is sleeved on the outer surface of the shaft sleeve, a stationary ring is installed in the inner ring of the moving ring, an anti-rotation pin is installed inside the stationary ring, a spiral inner sleeve is installed on the bottom surface of the anti-rotation pin, and a housing is sleeved on the outer surface of the stationary ring.

[0007] Preferably, two first sealing rings are sleeved on the outer surface of the shaft sleeve, and the outer surfaces of both first sealing rings are in contact with the moving ring.

[0008] Preferably, two second sealing rings are placed between the outer ring of the stationary ring and the inner ring of the housing, and a ball retaining ring is placed on the right side surface of one of the second sealing rings.

[0009] Preferably, a plurality of drive pins are installed on the outer ring of the shaft sleeve, and each drive pin is clamped with the moving ring.

[0010] Preferably, a spring is installed in the inner ring of the stationary ring.

[0011] Preferably, a shaft-use circlip is sleeved on the outer surface of the shaft sleeve.

[0012] The above at least one technical solution adopted in the embodiments of the present application can achieve the following beneficial effects:

[0013] A mechanical seal structure for preventing loosening in the utility model. By installing a spiral inner sleeve and an anti-rotation pin between the outer ring of the shaft sleeve and the inner ring of the stationary ring, the loosening between the shaft sleeve and the housing can be reduced, thereby improving the service life of the device to achieve the sealing effect of the mechanical seal structure. Therefore, through this device, the problem that the existing device is prone to loosening due to repeated use, resulting in the loosening of the sealing structure, is effectively solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The drawings described herein are used to provide a further understanding of the present application and form a part of the present application. The schematic embodiments and descriptions thereof are used to explain the present application and do not constitute an improper limitation of the present application. In the drawings:

[0015] Figure 1 It is: a front sectional structure schematic diagram of a mechanical seal structure for preventing loosening in the utility model;

[0016] Figure 2 It is: a mechanical seal structure for preventing loosening in the utility model Figure 1 The enlarged structure schematic diagram at position A in;

[0017] Figure 3 It is: a side sectional structure schematic diagram of a mechanical seal structure for preventing loosening in the utility model.

[0018] In the figure: 1, shaft sleeve; 2, second sealing ring; 3, ball retaining ring; 4, spiral inner sleeve; 5, drive pin; 6, spring; 7, moving ring; 8, shaft circlip; 9, first sealing ring; 10, stationary ring; 11, anti-rotation pin; 12, housing. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] To make the purpose, technical solutions and advantages of the present application clearer, the technical solutions of the present application will be clearly and completely described below in conjunction with the specific embodiments of the present application and the corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0020] The following will detail the technical solutions provided by the embodiments of the present application in conjunction with the drawings.

[0021] Please refer to Figures 1-3 , the utility model provides a technical solution for a mechanical seal structure for preventing loosening:

[0022] A mechanical seal structure for preventing loosening, including a shaft sleeve 1. A dynamic ring 7 is sleeved on the outer surface of the shaft sleeve 1. A static ring 10 is installed on the inner ring of the dynamic ring 7. An anti-rotation pin 11 is installed inside the static ring 10. A spiral inner sleeve 4 is installed on the bottom surface of the anti-rotation pin 11. A housing 12 is sleeved on the outer surface of the static ring 10. Specifically, by installing a spiral inner sleeve 4 and an anti-rotation pin 11 between the outer ring of the shaft sleeve 1 and the inner ring of the static ring 10, the loosening between the shaft sleeve 1 and the housing 12 can be reduced, thereby improving the service life of the device to achieve the sealing effect of the mechanical seal structure. Therefore, through this device, the problem that the existing device is prone to loosening due to repeated use, resulting in the loosening of the sealing structure, is effectively solved;

[0023] In this embodiment, two first sealing rings 9 are sleeved on the outer surface of the shaft sleeve 1. The outer surfaces of both first sealing rings 9 are in contact with the dynamic ring 7. Two second sealing rings 2 are placed between the outer ring of the static ring 10 and the inner ring of the housing 12. A ball retaining ring 3 is placed on the right side surface of one of the second sealing rings 2. Specifically, through the cooperation of the multiple first sealing rings 9 and the second sealing rings 2 provided, the sealing effect of the device can be further improved;

[0024] In this embodiment, a plurality of drive pins 5 are installed on the outer ring of the shaft sleeve 1. Each drive pin 5 is engaged with the dynamic ring 7. A spring 6 is installed on the inner ring of the static ring 10. A shaft-use elastic retaining ring 8 is sleeved on the outer surface of the shaft sleeve 1. Specifically, through the spring 6 and the shaft-use elastic retaining ring 8 provided, the loosening of the device can be better reduced.

[0025] Working principle: When this mechanical seal structure for preventing loosening is in use, first, a plurality of first sealing rings 9 are installed on the outer surface of the shaft sleeve 1. Under the cooperation of the drive pins 5 and the shaft-use elastic retaining ring 8 provided, the dynamic ring 7 and the static ring 10 are installed on the outer surface of the shaft sleeve 1. Then, the spiral inner sleeve 4 and the anti-rotation pin 11 are installed on the inner ring of the static ring 10. Then, the device is installed in the inner ring of the housing 12 through a plurality of second sealing rings 2. At the same time, a ball retaining ring 3 is installed on the outer surface of one of the second sealing rings 2, so that the device can be used normally.

[0026] It should also be noted that the term "including", "comprising" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, commodity or device. Without further limitation, an element defined by the statement "including one..." does not exclude the existence of another identical element in the process, method, commodity or device including the said element.

[0027] The above are only embodiments of the present application and are not intended to limit the present application. For those skilled in the art, various modifications and changes can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the scope of the claims of the present application.

Claims

1. A mechanical seal structure for preventing loosening, comprising a shaft sleeve (1), characterized in that: The outer surface of the shaft sleeve (1) is sleeved with a dynamic ring (7), the inner ring of the dynamic ring (7) is installed with a static ring (10), the interior of the static ring (10) is installed with an anti-rotation pin (11), the bottom surface of the anti-rotation pin (11) is installed with a spiral inner sleeve (4), and the outer surface of the static ring (10) is sleeved with an outer shell (12).

2. The anti-loosening mechanical seal structure according to claim 1, characterized in that: Two first sealing rings (9) are sleeved on the outer surface of the shaft sleeve (1), and the outer surfaces of the two first sealing rings (9) are in contact with the moving ring (7).

3. The anti-loosening mechanical seal structure according to claim 1, characterized in that: Two second sealing rings (2) are placed between the outer ring of the stationary ring (10) and the inner ring of the outer shell (12), and a bead retaining ring (3) is placed on the right side of one of the second sealing rings (2).

4. The anti-loosening mechanical seal structure according to claim 1, characterized in that: The outer ring of the shaft sleeve (1) is provided with a plurality of transmission pins (5), and each of the transmission pins (5) is clamped with a moving ring (7).

5. The anti-loosening mechanical seal structure according to claim 1, characterized in that: The inner ring of the stationary ring (10) is provided with a spring (6).

6. The anti-loosening mechanical seal structure according to claim 1, characterized in that: The outer surface of the shaft sleeve (1) is sleeved with a shaft elastic retaining ring (8).

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