Mechanical sealing structure

Abstract

The utility model discloses a mechanical seal structure, which relates to the technical field of sealing, and comprises a fixing ring and two groups of buffer pieces, the two groups of buffer pieces are slidably arranged at the two ends of the fixing ring, the fixing ring comprises a metal liner, a plurality of groups of buffer springs and a limiting bolt, and the buffer springs are symmetrically arranged at the two sides of the metal liner. The six sets of limiting bolts are symmetrically arranged on the outer wall of the metal inner container, the buffering piece comprises a sliding ring, a connecting piece, a fixing table, an outer rubber gasket and a sealing ring, the rear side of the connecting piece is rotationally connected to the front side of the sliding ring, and the outer rubber gasket is arranged on the front side of the fixing table in a sleeved mode. The same buffer parts are arranged at the two ends of the mechanical seal, the mechanical seal can be directly used without distinguishing the front side and the back side in actual use, the two buffer parts are the same in structure, the two-way buffer stroke can be provided, the buffer stroke is longer compared with a one-way buffer mechanical seal, and the overall sealing performance and the fault-tolerant rate can be improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to sealing technical field, concretely is a mechanical seal structure. BACKGROUND

[0002] Mechanical seal, also known as face seal, is a kind of shaft seal device of rotating machinery, its main function is to prevent fluid from the shaft and shaft sleeve of machine equipment such as pump, compressor, reaction kettle etc. Leakage, or prevent external impurities such as air or solid particles from invading the machine interior, mechanical seal is composed of at least one pair of end faces perpendicular to the rotation axis, these end faces are under the action of fluid pressure and compensation mechanism elasticity, and the cooperation of auxiliary seal, keep close and relative sliding, thereby constitute the sealing device that prevents fluid leakage.

[0003] At present, the mechanical seal on the market mostly only configures a set of buffer structure, which leads to the relatively short buffer stroke, when the fluid pressure difference inside the pump body changes greatly, this single buffer structure is often difficult to withstand the huge pressure change, thereby increasing the risk of sealing failure, in addition, the two-end interface design of most mechanical seals is not unified, which means that during installation, the operator must carefully distinguish the positive and negative directions of the seal to ensure its correct installation, this design not only increases the complexity of installation, but also may cause sealing failure due to misoperation, and there is certain improvement space in structure. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a kind of mechanical seal structure to solve the problems raised in the above background technology.

[0005] To achieve the above object, the utility model provides the following technical scheme: a kind of mechanical seal structure, including fixed ring and buffer piece, the buffer piece is equipped with two groups and is slidably arranged in the both ends of the fixed ring, the fixed ring includes metal inner bag, buffer spring and limit bolt, the buffer spring is equipped with several groups and is symmetrically arranged in the two sides of the metal inner bag, the limit bolt is equipped with six groups and is symmetrically arranged in the outer wall of the metal inner bag.

[0006] Preferably, the buffer piece includes sliding ring, connecting piece, fixed table, outer rubber gasket and sealing ring, the rear side of the connecting piece is rotatably connected to the front side of the sliding ring, the rear side of the fixed table is fixedly connected with the front side of the connecting piece, the outer rubber gasket is sleeved on the front side of the fixed table, and the sealing ring is fixed to the rear side of the sliding ring.

[0007] Preferably, the sliding ring comprises a sliding sleeve, an inner rubber gasket, a sliding groove, an outer fixed ring and an inner fixed ring, the sliding groove is provided with three groups and is uniformly arranged on the outer side of the sliding sleeve, the outer fixed ring is fixedly connected to the inner wall of the front end of the sliding sleeve, the inner fixed ring is fixedly connected to the inner wall of the rear end of the sliding sleeve, and the inner rubber gasket is mounted in the gap between the outer fixed ring and the inner fixed ring.

[0008] Preferably, the front side of the sealing ring is attached to the outer side of the inner fixed ring, and the rear side of the sealing ring is fixed with the buffer spring.

[0009] Preferably, the limiting bolt corresponds to the sliding groove, and the sliding connection between the buffer and the fixed ring is realized by the sliding of the limiting bolt in the sliding groove.

[0010] Compared with the prior art, the beneficial effects of the utility model are:

[0011] The mechanical sealing structure provided by the utility model has the same buffer at both ends, can be directly used without distinguishing the front and back in actual use, and has the same structure of the two buffers, so that bidirectional buffer stroke can be provided, the buffer stroke is longer than that of the mechanical sealing part with unidirectional buffer, and the overall sealing performance and fault tolerance can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0012] The utility model will be further described in connection with the drawings:

[0013] Fig. 1 It is a schematic view of the mechanical sealing structure of the utility model;

[0014] Fig. 2 It is a disassembled view of the mechanical sealing structure of the utility model;

[0015] Fig. 3 It is a schematic view of the sliding ring of the mechanical sealing structure of the utility model.

[0016] As shown in the drawings: 1, fixed ring; 11, metal inner container; 12, buffer spring; 13, limiting bolt; 2, buffer; 21, sliding ring; 211, sliding sleeve; 212, inner rubber gasket; 213, sliding groove; 214, outer fixed ring; 215, inner fixed ring; 22, connecting piece; 23, fixed table; 24, outer rubber gasket; 25, sealing ring. DETAILED DESCRIPTION

[0017] In order to more clearly illustrate the overall concept of the utility model, the following will be described in detail in the form of example in combination with the drawings.

[0018] It should be noted that in the following description, many specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced in a variety of ways beyond the specific details set forth herein, and the present application's scope is not limited to the details as described in the following description.

[0019] In addition, in the description of the present application, it should be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0020] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship of two elements. However, it is noted that direct connection means that the connection between the two main bodies does not form a connection relationship through an excessive structure, but is connected to form a whole only through a transmission structure. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0021] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature. The first and second features can be in direct contact, or the first and second features can be in indirect contact through an intermediate medium. In the description of the present application, the description of the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0022] Please refer to Figs. 1 to 3The utility model provides a technical scheme: a mechanical seal structure, including fixed ring 1 and buffer piece 2, buffer piece 2 is equipped with two groups and is slidably arranged in both ends of fixed ring 1, fixed ring 1 includes metal inner bag 11, buffer spring 12 and limit bolt 13, buffer spring 12 is equipped with several groups and is symmetrically arranged in both sides of metal inner bag 11, limit bolt 13 is equipped with six groups and is symmetrically arranged in the outer wall of metal inner bag 11,

[0023] The mechanical seal has the same buffer piece 2 at both ends, can be directly used without distinguishing positive and negative in actual use, and the two buffer pieces 2 are structurally same, can provide bidirectional buffer stroke, the buffer stroke is longer than that of the mechanical seal piece with unidirectional buffer, and the overall sealing property and fault tolerance can be improved;

[0024] Buffer piece 2 includes sliding ring 21, connecting piece 22, fixed platform 23, outer rubber gasket 24 and sealing ring 25, the rear side of connecting piece 22 is rotationally connected at the front side of sliding ring 21, the rear side of fixed platform 23 is fixedly connected with the front side of connecting piece 22, outer rubber gasket 24 is sleeved at the front side of fixed platform 23, and sealing ring 25 is fixed at the rear side of sliding ring 21.

[0025] In use, outer rubber gasket 24 can improve the friction force when being installed with the pump body, reduces the situation that fluid leaks outward through the gap between the pump body and buffer piece 2, and the use of connecting piece 22 and fixed platform 23 can facilitate the rotation of the pump body with buffer piece 2 during installation, thereby adjusting the angle of pump body installation.

[0026] Sliding ring 21 includes sliding sleeve 211, inner rubber gasket 212, sliding groove 213, outer fixed ring 214 and inner fixed ring 215, sliding groove 213 is provided with three groups and is evenly arranged on the outside of sliding sleeve 211, outer fixed ring 214 is fixedly connected to the front end inner wall of sliding sleeve 211, inner fixed ring 215 is fixedly connected to the rear end inner wall of sliding sleeve 211, and inner rubber gasket 212 is installed in the gap between outer fixed ring 214 and inner fixed ring 215.

[0027] Inner rubber gasket 212 plays a secondary protection role, avoids the outward leakage of fluid in the pump body through the gap between fixed ring 1 and buffer piece 2, and improves the overall sealing property.

[0028] The front side of sealing ring 25 is attached to the outside of inner fixed ring 215, and the rear side of sealing ring 25 is fixed with buffer spring 12.

[0029] Limit bolt 13 corresponds to sliding groove 213, and the sliding connection between buffer piece 2 and fixed ring 1 is realized by the sliding of limit bolt 13 in sliding groove 213.

[0030] During use, if the pressure difference changes in the pump body, the buffer parts 2 at both ends will be squeezed inward or stretched outward. At this time, the buffer spring 12 used for connection will be deformed to achieve a buffering effect. Synchronously, when the buffer part 2 moves, the limit bolt 13 will slide in the slide groove 213. The slide groove 213 can limit the stroke of the limit bolt 13 to avoid the buffer part 2 falling off due to a large pressure difference change.

[0031] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present invention, including the claims, is limited to these examples. Under the concept of the present invention, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity.

[0032] The present invention is intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of protection of the present invention.

Claims

1. A mechanical seal structure comprising a stationary ring (1) and a buffer member (2), characterized in that: The buffer piece (2) is provided with two groups and is slidingly arranged at both ends of the fixed ring (1), the fixed ring (1) comprises a metal inner container (11), a buffer spring (12) and a limiting bolt (13), the buffer spring (12) is provided with several groups and is symmetrically arranged at both sides of the metal inner container (11), and the limiting bolt (13) is provided with six groups and is symmetrically arranged on the outer wall of the metal inner container (11).

2. The mechanical seal structure according to claim 1, characterized by: The buffer piece (2) comprises a sliding ring (21), a connecting piece (22), a fixed table (23), an outer rubber gasket (24) and a sealing ring (25), the rear side of the connecting piece (22) is rotationally connected to the front side of the sliding ring (21), the rear side of the fixed table (23) is fixedly connected to the front side of the connecting piece (22), the outer rubber gasket (24) is sleeved on the front side of the fixed table (23), and the sealing ring (25) is fixed to the rear side of the sliding ring (21).

3. A mechanical seal structure according to claim 2, wherein: The sliding ring (21) comprises a sliding sleeve (211), an inner rubber gasket (212), a sliding groove (213), an outer fixed ring (214) and an inner fixed ring (215), the sliding groove (213) is provided with three groups and is uniformly arranged on the outer side of the sliding sleeve (211), the outer fixed ring (214) is fixedly connected to the inner wall of the front end of the sliding sleeve (211), the inner fixed ring (215) is fixedly connected to the inner wall of the rear end of the sliding sleeve (211), and the inner rubber gasket (212) is mounted in the gap between the outer fixed ring (214) and the inner fixed ring (215).

4. The mechanical seal structure of claim 3, wherein: The front side of the sealing ring (25) is attached to the outer side of the inner fixed ring (215), and the rear side of the sealing ring (25) is fixed with the buffer spring (12).

5. A mechanical seal structure according to claim 4, wherein: The limiting bolt (13) corresponds to the sliding groove (213), and the sliding connection between the buffer piece (2) and the fixed ring (1) is realized by the sliding of the limiting bolt (13) in the sliding groove (213).

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