Mechanical sealing structure at rotary joint

Abstract

The utility model discloses a mechanical sealing structure for a rotary joint, relates to the technical field of sealing structures, and aims to provide the mechanical sealing structure for the rotary joint, which is good in sealing performance and long in service life, and comprises a shell component, a rotating shaft, a moving ring, a static ring and a compensation component, a first sealing ring is arranged between the moving ring and the rotating shaft and used for static sealing between the moving ring and the rotating shaft, a second sealing ring is arranged between the static ring and the shell assembly and used for static sealing between the static ring and the shell assembly, and the compensation assembly is installed on the side, away from medium extrusion, of the static ring and connected with the static ring. According to the mechanical sealing structure, the compensation assembly acts on the static ring and does not rotate along with rotation of the rotating shaft, the service life of the mechanical sealing structure can be prolonged, the compensation assembly does not make contact with media, and corrosion or rusting of the mechanical sealing structure caused by the media can be effectively avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to a sealing structure technical field more specifically, it relates to a kind of mechanical sealing structure at rotary connection. BACKGROUND

[0002] The elutriator is a kind of common washing equipment, for washing various table cloth, bed sheet, quilt cover, napkin, clothing, bath towel, towel and other fabrics.Its basic structure includes shell and the stirring vane for being stirred to clothing, and the stirring vane is rotated by the rotating shaft that one end extends out of shell and is connected with motor, to effectively wash and dewater operation to clothing.

[0003] However, in the actual use process of the elutriator, since the rotating shaft and the shell need to be relatively rotated, a certain gap exists between the two, thereby generating relative movement.The relative movement makes the sealing performance of the elutriator poor, and liquid leakage phenomenon is prone to occur.

[0004] In order to solve the above problems, improve the sealing performance of the elutriator, and avoid the occurrence of liquid leakage phenomenon, it is particularly important to design a mechanical sealing structure for the rotary connection between the rotating shaft and the shell.

[0005] Common mechanical sealing structure mostly includes static ring which is relatively stationary with shell and dynamic ring which is sleeved on rotating shaft and rotates with rotating shaft, and the dynamic ring has compensation structure for abutting the dynamic ring against the static ring to make its contact surface fit and ensure its sealing effect.In this structure, the compensation structure is mostly compensated by spring, and the dynamic ring is often extruded towards the medium, and the medium pressure and the spring jointly push the dynamic ring to tightly abut against the static ring, but this structure has the following defects:

[0006] Firstly, the compensation structure is installed on the dynamic ring, and is prone to shift, deform or other damage under the action of vibration or centrifugal force during rotation, which shortens the service life of the compensation structure;

[0007] Secondly, the compensation structure is located in the medium, and is also prone to corrosion and rust due to medium pollution, which also shortens its service life. INVENTION CONTENTS

[0008] In view of the problems existing in the prior art, the utility model provides a mechanical sealing structure at rotary connection to solve the technical problems mentioned in the background art.

[0009] To achieve the above purpose, the utility model provides the following technical scheme: a mechanical sealing structure at rotary connection, comprising a shell assembly, a rotating shaft, a dynamic ring, a static ring and a compensation assembly, wherein,

[0010] The dynamic ring and the static ring both have abutting sealing end faces, and the side of the dynamic ring extruded towards the medium,

[0011] The rotating ring is mounted outside the rotating shaft, and a first sealing ring is provided between the rotating ring and the rotating shaft for static sealing.

[0012] The stationary ring is installed inside the housing assembly, and a second sealing ring is provided between the stationary ring and the housing assembly for static sealing.

[0013] The compensation component is installed on the side of the stationary ring away from the medium compression, and the compensation component is connected to the stationary ring to compress the stationary ring so that it comes into contact with the moving ring.

[0014] The present invention is further configured such that the edge of the moving ring has a surrounding portion facing the stationary ring, which is used to block the medium and prevent the medium from squeezing the stationary ring and causing it to separate from the moving ring.

[0015] The present invention is further configured such that the housing assembly includes a first housing and a second housing, the first housing being the washer-extractor body for washing and extracting clothes, the second housing being connected to the first housing by bolts and nuts, the stationary ring and the compensation assembly being placed inside the second housing, and the second housing having a first through hole for the rotating shaft to extend out.

[0016] The present invention is further configured such that the compensation component includes a fixed ring and a spring, and a connecting ring is fixed on both the fixed ring and the stationary ring, and the two ends of the spring are fixedly sleeved on the connecting ring.

[0017] The present invention is further configured such that the end of the stationary ring near the rotating ring has a flared section, which allows the stationary ring to fit more closely to the rotating ring under the pressure of the medium.

[0018] The present invention is further configured such that both the moving ring and the rotating shaft have a second through hole for bolts to pass through, and the moving ring and the rotating shaft are connected at the second through hole by a bolt and nut.

[0019] Compared with the prior art, this utility model provides a mechanical seal structure for a rotating connection, which has the following advantages:

[0020] 1. In this mechanical seal structure, the compensation component acts on the stationary ring and does not rotate with the rotating shaft, which can extend its service life. In addition, the compensation component does not come into contact with the medium, which can effectively prevent it from being corroded or rusted by the medium.

[0021] 2. In this mechanical seal structure, the rotating ring has a surrounding part to prevent the medium pressure from acting directly on the stationary ring and pushing the stationary ring to separate from the rotating ring. The stationary ring also has a flared section. When the medium pressure acts on the outer wall of the stationary ring, it can squeeze the flared section, so that the stationary ring is squeezed on the rotating ring, thereby improving the sealing performance. Attached Figure Description

[0022] Figure 1 This is a schematic cross-sectional view of the mechanical seal structure in this utility model;

[0023] Figure 2 This is a schematic diagram of the static ring and compensation assembly in this utility model;

[0024] Figure 3 This is a cross-sectional view of the present invention showing the dynamic ring and stationary ring in an unconnected state.

[0025] Figure 4 This is a schematic diagram of the structure of the second shell in this utility model.

[0026] In the figure: 1. Housing assembly; 101. First housing; 102. Second housing; 1021. First through hole; 1022. Positioning pin; 2. Rotating shaft; 3. Moving ring; 301. Enclosing part; 302. First sealing groove; 4. Stationary ring; 401. Flared section; 402. Second sealing groove; 5. Compensation assembly; 501. Fixed ring; 5011. Positioning hole; 502. Spring; 503. Connecting ring; 6. Sealing end face; 7. First sealing ring; 8. Second sealing ring; 9. Second through hole. Detailed Implementation

[0027] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0028] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0029] In this utility model, unless otherwise stated, the orientations used, such as "up" and "down", usually refer to the direction shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" usually refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0030] Please see Figures 1-4The mechanical seal structure at the rotational connection between the washer body and the rotating shaft includes a housing assembly 1, a rotating shaft 2, a rotating ring 3, a stationary ring 4, and a compensation assembly 5. Both the rotating ring 3 and the stationary ring 4 have abutting sealing end faces 6, with the rotating ring 3 facing the side subjected to media compression. The rotating ring 3 is mounted outside the rotating shaft 2, and a first sealing ring 7 is provided between the rotating ring 3 and the rotating shaft 2 for static sealing. The stationary ring 4 is mounted inside the housing assembly 1, and a second sealing ring 8 is provided between the stationary ring 4 and the housing assembly 1 for static sealing. The compensation assembly 5 is mounted on the side of the stationary ring 4 away from the side subjected to media compression and is connected to the stationary ring 4. It is used to compress the stationary ring 4 so that it abuts against the rotating ring 3. The edge of the rotating ring 3 has a surrounding portion 301 facing the stationary ring 4 to block the media and prevent the media from compressing the stationary ring 4 and causing it to separate from the rotating ring 3. The housing assembly 1 includes a first housing 101 and a second housing 102. The first housing 101 is the washer body. Used for washing and removing clothes, the second housing 102 is connected to the first housing 101 by bolts and nuts. The stationary ring 4 and the compensation component 5 are both placed inside the second housing 102. The second housing 102 has a first through hole 1021 for the rotating shaft 2 to extend out. The compensation component 5 includes a fixed ring 501 and a spring 502. A connecting ring 503 is fixed on both the fixed ring 501 and the stationary ring 4. The two ends of the spring 502 are fixedly sleeved on the connecting ring 503. The end of the stationary ring 4 near the moving ring 3 has a flared section 401. Under the pressure of the medium, the stationary ring 4 can fit more closely to the rotating ring 3. Both the rotating ring 3 and the rotating shaft 2 have a second through hole 9 for bolts to pass through. The rotating ring 3 and the rotating shaft 2 are connected at the second through hole 9 by bolt and nut. The rotating ring 3 has a first sealing groove 302 for the first sealing ring 7 to be inserted, and the stationary ring 4 has a second sealing groove 402 for the second sealing ring 8 to be inserted. The fixed ring 501 has a positioning hole 5011, and the second housing 102 has a matching positioning pin 1022.

[0031] During assembly, the first sealing ring 7 is inserted into the first sealing groove 302, and the moving ring 3 is sleeved on the outside of the rotating shaft 2. The bolt is passed through the second through hole 9 on the moving ring 3 and the rotating shaft 2 and then threaded into the nut. The rotating shaft 2 and the moving ring 3 are placed inside the first housing 101. The spring 502 is sleeved on the connecting ring 503 between the stationary ring 4 and the fixed ring 501. The whole assembly is placed inside the second housing 102, so that the positioning hole 5011 on the fixed ring 501 is adapted to the positioning pin 1022 inside the second housing 102. The second housing 102 and the first housing 101 are connected by bolts and nuts. At this time, the stationary ring 4 and the moving ring 3 are in contact, and the spring 502 is in a compressed state.

[0032] During use, the rotating shaft 2 drives the rotating ring 3 to rotate together. Dynamic sealing is achieved by the sealing end face 6 between the rotating ring 3 and the stationary ring 4. Static sealing is achieved between the rotating ring 3 and the rotating shaft 2 by the first sealing ring 7. Static sealing is achieved between the stationary ring 4 and the second housing 102 by the second sealing ring 8. When friction between the rotating ring 3 and the stationary ring 4 causes the sealing end face 6 to wear, the spring 502 presses the stationary ring 4 to move towards the rotating ring 3, so that it always fits tightly, thus achieving compensation. The surrounding part 301 on the rotating ring 3 can block the medium and prevent the medium pressure from squeezing the stationary ring 4 and causing it to separate from the rotating ring 3. The stationary ring 4 also has a flared section 401, which will squeeze the stationary ring 4 onto the rotating ring 3 under the pressure of the medium.

[0033] In all the solutions mentioned above, although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A mechanical seal structure for a rotating connection, characterized in that, It includes a housing assembly (1), a rotating shaft (2), a moving ring (3), a stationary ring (4), and a compensation assembly (5), wherein, Both the moving ring (3) and the stationary ring (4) have abutting sealing end faces (6), and the moving ring (3) faces the side where the medium is squeezed. The rotating ring (3) is installed outside the rotating shaft (2), and a first sealing ring (7) is provided between the rotating ring (3) and the rotating shaft (2) for static sealing between the rotating ring (3) and the rotating shaft (2). A stationary ring (4) is installed inside the housing assembly (1), and a second sealing ring (8) is provided between the stationary ring (4) and the housing assembly (1) for static sealing between the stationary ring (4) and the housing assembly (1). The compensation component (5) is installed on the side of the stationary ring (4) away from the medium compression, and the compensation component (5) is connected to the stationary ring (4) to compress the stationary ring (4) so ​​that it comes into contact with the moving ring (3).

2. The mechanical seal structure for a rotating connection according to claim 1, characterized in that, The edge of the moving ring (3) has a surrounding portion (301) facing the stationary ring (4).

3. The mechanical seal structure for a rotating connection according to claim 1, characterized in that, The housing assembly (1) includes a first housing (101) and a second housing (102). The second housing (102) is connected to the first housing (101) by bolts and nuts. The stationary ring (4) and the compensation assembly (5) are both placed inside the second housing (102). The second housing (102) has a first through hole (1021) for the rotating shaft (2) to extend out.

4. The mechanical seal structure for a rotating connection according to claim 3, characterized in that, The compensation component (5) includes a fixed ring (501) and a spring (502). A connecting ring (503) is fixed on both the fixed ring (501) and the stationary ring (4). The two ends of the spring (502) are fixedly sleeved on the connecting ring (503).

5. The mechanical seal structure for a rotating connection according to claim 1, characterized in that, The stationary ring (4) has a flared section (401) at the end near the moving ring (3).

6. The mechanical seal structure for a rotating connection according to claim 1, characterized in that, Both the moving ring (3) and the rotating shaft (2) have a second through hole (9) for bolts to pass through. The moving ring (3) and the rotating shaft (2) are connected at the second through hole (9) by bolt and nut.

7. The mechanical seal structure for a rotating connection according to claim 1, characterized in that, The moving ring (3) has a first sealing groove (302) for inserting the first sealing ring (7), and the stationary ring (4) has a second sealing groove (402) for inserting the second sealing ring (8).

8. The mechanical seal structure for a rotating connection according to claim 4, characterized in that, The fixing ring (501) has a positioning hole (5011), and the second housing (102) has a matching positioning pin (1022).

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