Mechanical sealing element

Abstract

The utility model provides a mechanical sealing element, which belongs to the technical field of mechanical sealing elements and comprises a sealing rotor and a static ring, the sealing rotor is fixed on a rotating shaft, the static ring is fixed on an equipment shell, a plurality of grooves are circumferentially arranged at one end of the static ring, limiting elements are mounted in the grooves, and the limiting elements are fixed on the static ring. The limiting piece is used for being connected with an equipment shell and limiting axial rotation of the static ring. The groove is formed in the end of the static ring, the limiting piece protruding outwards is installed in the groove and used for connecting the static ring with the equipment shell, the limiting piece and the equipment shell are fixed in an interference mode, and the stability of the static ring is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical seals, in particular to a mechanical seal. Background Art

[0002] When the working surfaces of the moving ring and the stationary ring in a mechanical seal rotate at a relatively high speed, since the power of the moving ring's rotation generally comes from the main shaft of the engine, vibration during the rotation process is inevitable, and the frequency of the vibration is usually very high, which will not only affect the performance of the elastic parts at the moving ring, but also cause the moving ring to get stuck on the stationary ring, causing the stationary ring to rotate circumferentially, affecting the sealing performance of the stationary ring.

[0003] The existing patent document with publication number CN216666499U provides a self-locking mechanical seal, which improves the performance of the mechanical seal by preventing the dynamic ring and the static ring from getting stuck together. The application has good effects, but due to its complex internal structure, the maintenance frequency is high under high-intensity working rings. The contact between the dynamic ring and the static ring is caused by the increase of friction force, which causes the static ring to move. Similarly, enhancing the fixing effect of the static ring can also have good effects. Utility Model Content

[0004] The utility model aims at the deficiencies in the prior art and provides a mechanical seal, in which a groove is arranged at the end of a stationary ring, and a limit piece protruding outward is installed in the groove, so as to connect the stationary ring with a device housing, and the limit piece is fixed with the device housing by interference fit, thereby improving the stability of the stationary ring.

[0005] In order to solve the above technical problems, the utility model solves the problem that the dynamic ring and the static ring are stuck, causing the static ring to move and affect the sealing through the following technical solutions.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A mechanical seal comprises a sealing rotor and a stationary ring, wherein the sealing rotor is fixed on a rotating shaft, and the stationary ring is fixed on a device housing. A plurality of grooves are circumferentially arranged at one end of the stationary ring, and a limit piece is installed in the groove. The limit piece is used to connect to the device housing and limit the axial rotation of the stationary ring.

[0008] Preferably, the sealed rotor consists of an end seat and a moving ring, the end seat is fixed to the rotating shaft by bolts, the moving ring is installed on the side of the end seat and is frictionally fixed to the rotating shaft by a rubber ring; the side of the end seat is provided with a clamp that penetrates into the moving ring.

[0009] Preferably, the end seat and the movable ring are axially slidably matched, and an elastic member is provided between the end seat and the movable ring.

[0010] Preferably, the elastic member is composed of a gasket and a spring, a plurality of protruding rods are evenly distributed circumferentially on the side of the gasket, and the spring is sleeved on the protruding rods; a plurality of limiting holes are evenly distributed circumferentially on the side of the end seat, and the spring and the protruding rods are both inserted into the limiting holes.

[0011] Preferably, one end of the spring contacts the gasket and the other end contacts the bottom of the limiting hole, and the spring in an extended state is longer than the length of the protruding rod.

[0012] Preferably, a vent hole penetrating through the end seat is provided at the end of the limiting hole.

[0013] Preferably, the groove is arranged in a cross structure, and the limiting member is installed inside the groove and protrudes outside.

[0014] Preferably, a flange seat is installed on the side of the moving ring, and the limiting member is fixed on the flange seat.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] The utility model provides a mechanical seal composed of a sealing rotor and a stationary ring, a groove is arranged at the end of the stationary ring, and a stopper protruding outward is installed inside the groove, which is used to connect the stationary ring with an equipment housing, and the stopper is fixed with the equipment housing by interference fit, thereby improving the stability of the stationary ring.

[0017] In the utility model, one end of the limiter is made of elastic material and protrudes outward from the groove surface to contact with the device housing to achieve interference fit, and the other end is made of hard material to maintain its surface deformation without affecting the bottom surface, thereby avoiding friction between the limiter and the rotating shaft; the present application sets a groove 3 on the basis of the static ring and fills the limiter, so that the stability of the installation is improved while maintaining the shape of the dynamic ring, and the assembly and disassembly are convenient, and will not affect the device housing.

[0018] In the utility model, the groove is arranged in a cross structure, which can prevent the limiting member from falling off from the groove in the radial direction or the circumferential direction, and maintain the stability of the stationary ring fixation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0021] Figure 2 This is a schematic diagram of the sealed rotor split structure of the utility model;

[0022] Figure 3 This is a schematic diagram of the split bottom view structure of the sealed rotor of the utility model;

[0023] Figure 4 It is a schematic diagram of the split structure of the static ring and the limiter of the utility model;

[0024] Figure 5 This is a schematic diagram of the overall structure of the utility model after the limiter is installed on the flange seat;

[0025] Figure 6 The utility model is a schematic diagram of the structure after the limiter is installed on the flange seat and removed from the stationary ring.

[0026] Explanation of the figure numbers: 1. Sealed rotor; 2. Stationary ring; 3. Groove; 4. Limiting piece; 5. End seat; 51. Limiting hole; 52. Air vent; 6. Moving ring; 7. Clamp; 8. Elastic piece; 81. Gasket; 82. Spring; 83. Protruding rod; 9. Flange seat. DETAILED DESCRIPTION

[0027] The utility model is described in further detail below in conjunction with the accompanying drawings.

[0028] The following description is used to disclose the utility model so that those skilled in the art can implement the utility model. The preferred embodiments described below are only examples, and those skilled in the art can think of other obvious variations. The basic principles of the utility model defined in the following description can be used for other implementation schemes, variations, improvements, equivalent schemes, and other technical solutions that do not deviate from the spirit and scope of the utility model.

[0029] Those skilled in the art should understand that, in the disclosure of the present invention, the directions or positions indicated by the terms "longitudinal", "lateral", "up", "down", "left", "right", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. are based on the directions or positional relationships shown in the accompanying drawings, which are only simplified descriptions for the convenience of describing the present invention, and do not indicate or imply that the device or component referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the above terms should not be understood as limitations on the present invention.

[0030] It is to be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the element may be multiple, and the term "one" should not be understood as a limitation on the quantity. Example

[0031] See also Figure 1-6The present application provides a mechanical seal, including a sealing rotor 1 and a stationary ring 2. The sealing rotor 1 is fixed on a rotating shaft, and the stationary ring 2 is fixed on a device housing.

[0032] The outer ring of the stationary ring 2 is sleeved with a sealing ring in contact with the equipment housing for sealing, and the inner end of the sealed rotor 1 is sealed with the rotating shaft through the sealing ring.

[0033] In the embodiment of the present application, a plurality of grooves 3 are evenly arranged in the circumferential direction at one end of the stationary ring 2 connected to the device housing, and the grooves 3 are arranged in a cross structure. A stopper 4 is installed on each groove 3, and one end of the stopper 4 is made of elastic material and protrudes outward from the surface of the groove 3. When the housing is installed, the stopper 4 fully contacts the device housing to achieve an interference fit. The inner side of the stopper 4 is made of hard material, and after its surface is deformed, it will not cause hardness to the bottom surface. The sealing stopper 4 contacts the rotating shaft to generate friction.

[0034] When the groove 3 is arranged in a cross structure, the limiting member 4 can be prevented from falling off from the groove 3 in the radial direction or the circumferential direction, thereby maintaining the stability of the stationary ring 2.

[0035] The utility model improves the installation stability of the stationary ring 2 and the equipment housing by installing an elastic limiter 4 at the end of the stationary ring 2, and avoids the stationary ring 2 from rotating due to the interference of the sealing rotor 1, which causes sealing problems.

[0036] The utility model arranges a groove 3 on the basis of the stationary ring 2 and fills the limiter 4, so that the stability of installation is improved and the disassembly and assembly are convenient on the basis of maintaining the shape of the dynamic ring 6.

[0037] In the embodiment of the present application, the sealed rotor 1 is composed of an end seat 5 and a moving ring 6, both of which are sleeved on the rotating shaft, and a threaded hole is provided on the side of the end seat 5, and the end seat 5 is fixed to the rotating shaft by installing bolts. The moving ring 6 is located on the side of the end seat 5, and three clamps 7 are fixed circumferentially on the end seat 5. The clamps 7 face the moving ring 6 and penetrate into the clamping groove of the moving ring 6. The end seat 5 will drive the moving ring 6 to rotate synchronously. In addition, the inner side of the moving ring 6 is fixed to the rotating shaft by a rubber ring for sealing.

[0038] The clamping member 7 and the clamping groove are in sliding cooperation, so that the end seat 5 and the moving ring 6 are in sliding cooperation in the axial direction. In the implementation process, an elastic member 8 is provided between the end seat 5 and the moving ring 6, and the moving ring 6 is supported by the elastic member 8 to ensure the close fit of the friction end surface and to maintain compensation after the end surface wear.

[0039] The elastic member 8 is composed of a gasket 81 and a spring 82. First, a plurality of non-penetrating limiting holes 51 are set at one end of the end seat 5 facing the movable ring 6, and a vent hole 52 is set at the bottom end of the limiting hole 51, and the vent hole 52 will penetrate the end seat 5. A convex rod 83 is welded on the side of the gasket 81, and each convex rod 83 faces the limiting hole 51 and is sleeved with a spring 82. During installation, the gasket 81 is abutted against the end of the movable ring 6, and the convex rod 83 penetrates the limiting hole 51. One end of the spring 82 contacts the bottom end of the limiting hole 51, and the other end contacts the gasket 81. During installation, the spring 82 is in a compressed state and abuts against the outer side of the convex rod 83 to slide with it.

[0040] In the present invention, the spring 82 is used to maintain the close fit of the friction end surface of the dynamic ring 6. After the spring 82 is sleeved on the protruding rod 83, the circumferential torsion of the spring 82 when the rotating shaft is working can be offset to prevent the spring 82 from deforming and twisting.

[0041] The provision of the air hole 52 maintains the flow of gas or liquid inside the limiting hole 51 , thereby preventing the pressure resistance from affecting the deformation of the spring 82 when the protruding rod 83 moves.

[0042] In the present application, the dynamic ring 6 and the stationary ring 2 are in contact with each other and generate friction. The spring 82 maintains the tight seal at the dynamic ring 6 and also controls the contact stability between the dynamic ring 6 and the stationary ring 2, making it difficult for the stopper 4 to disengage in the axial direction.

[0043] In some embodiments, according to the structure of the device housing, a flange seat 9 can be installed on the side of the dynamic ring 6, and the limiter 4 can be fixed on the side of the flange seat 9. After the flange seat 9 is fixed, the limiter 4 can be inserted into the groove 3 to engage with it. At this time, the limiter 4 can be made of hard material and does not need to protrude outward. The fixed flange seat 9 can limit the dynamic ring 6 to prevent its circumferential rotation. The plug-in relationship between the limiter 4 and the groove 3 makes it easy to disassemble and replace the dynamic ring 6.

[0044] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are only examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The functions and structural principles of the present invention have been demonstrated and explained in the embodiments. Without departing from the principles, the embodiments of the present invention may be deformed or modified in any way.

Claims

1. A mechanical seal, comprising a sealing rotor (1) and a stationary ring (2), wherein the sealing rotor (1) is fixed on a rotating shaft, and the stationary ring (2) is fixed on a device housing, characterized in that: A plurality of grooves (3) are circumferentially provided at one end of the stationary ring (2). A limiting member (4) is installed in the groove (3), and the limiting member (4) is used to connect to the device housing and limit the axial rotation of the stationary ring (2).

2. A mechanical seal according to claim 1, characterized in that: The sealed rotor (1) is composed of an end seat (5) and a moving ring (6), wherein the end seat (5) is fixed to the rotating shaft by bolts. The moving ring (6) is mounted on the side of the end seat (5) and is frictionally engaged with the rotating shaft through a rubber ring; A clamping piece (7) that penetrates into the moving ring (6) is provided on the side of the end seat (5).

3. A mechanical seal according to claim 2, characterized in that: The end seat (5) and the movable ring (6) are slidably matched along the axial direction, and an elastic member (8) is provided between the end seat (5) and the movable ring (6).

4. A mechanical seal according to claim 3, characterized in that: The elastic member (8) is composed of a gasket (81) and a spring (82); a plurality of protruding rods (83) are evenly distributed in the circumferential direction on the side edge of the gasket (81); and the spring (82) is sleeved on the protruding rods (83); A plurality of limiting holes (51) are evenly arranged in the circumferential direction of the side edge of the end seat (5), and the spring (82) and the protruding rod (83) are both inserted into the limiting holes (51).

5. A mechanical seal according to claim 4, characterized in that: One end of the spring (82) contacts the gasket (81), and the other end contacts the bottom of the limiting hole (51); the spring (82) is longer than the length of the protruding rod (83) in the extended state.

6. A mechanical seal according to claim 5, characterized in that: An air hole (52) penetrating the end seat (5) is provided at the end of the limiting hole (51).

7. A mechanical seal according to claim 6, characterized in that: The groove (3) is arranged in a cross structure, and the limiting member (4) is installed inside the groove (3) and protrudes outside.

8. A mechanical seal according to claim 6, characterized in that: A flange seat (9) is installed on the side of the moving ring (6), and the limiting member (4) is fixed on the flange seat (9).

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