Compressible spring-loaded shaft seal gasket ring

Abstract

This utility model relates to the field of mechanical seal technology, and particularly to a compressible spring-loaded shaft seal gasket ring, comprising a first annular base, a second annular base, and an elastic connecting plate. Each of the first and second annular bases has a plurality of through-holes at corresponding positions. Insert rods are inserted into each pair of these through-holes. First threaded grooves are formed on the front and rear surfaces of each insert rod. Each of the first threaded grooves is threaded with a fastening nut. The outer surface of each fastening nut has a plurality of anti-slip grooves. The compressible spring-loaded shaft seal gasket ring of this utility model, through the bellows structure of the elastic transition cylinder and the arc-shaped design of the elastic connecting plate, can adapt to the radial runout and axial movement of the shaft, absorbing vibration energy through elastic deformation, reducing wear on the sealing surface, and lowering the risk of leakage.

Description

Technical Field

[0001] This utility model relates to the field of mechanical seal technology, and in particular to a compressible spring-loaded shaft seal gasket ring. Background Technology

[0002] In the field of mechanical transmission, the sealing between the rotating shaft and the equipment housing is a key technology to prevent media leakage (such as liquids and gases) and the intrusion of external impurities.

[0003] Traditional shaft sealing devices (such as mechanical seals and packing seals) have the following core problems: 1. Traditional sealing structures are mostly rigid and fixed, which makes it difficult to adapt to the radial runout or axial movement of the shaft, and easily leads to wear and leakage of the sealing surface; 2. The compression of traditional seals needs to be adjusted one by one by gaskets or bolts, which is cumbersome and has low precision, and it is difficult to ensure uniform sealing preload. Utility Model Content

[0004] The main purpose of this invention is to provide a compressible, spring-loaded shaft seal gasket ring, which can effectively solve the problems in the background art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A compressible, resilient shaft seal gasket ring includes a first annular base, a second annular base, and an elastic connecting plate. The first and second annular bases each have a plurality of through-holes at corresponding positions. A rod is inserted into each pair of the positioning holes. The front and rear surfaces of the rods each have a first threaded groove. Each of the first threaded grooves is threaded with a fastening nut. The outer surfaces of the fastening nuts each have a plurality of anti-slip grooves.

[0007] The second annular base has a second threaded groove, and an axial adjustment tube is threadedly connected to the second threaded groove. An elastic transition cylinder is fixedly connected to the front end of the axial adjustment tube. A main sealing ring is fixedly connected to the front end of the elastic transition cylinder. An auxiliary sealing ring is connected to the main sealing ring through an elastic connecting plate. An elastic buffer ring is fixed to the inner wall of the auxiliary sealing ring. A dustproof sealing ring is fixed to the inner ring of the elastic buffer ring.

[0008] Preferably, a plurality of elastic connecting plates are provided, the rear ends of the plurality of elastic connecting plates are fixedly connected to the front end of the main sealing ring, and the inner wall surfaces of the plurality of elastic connecting plates are fixedly connected to the outer surface of the auxiliary sealing ring.

[0009] Preferably, the number of positioning holes in both the first annular base and the second annular base is eight, and they are evenly distributed along the circumference.

[0010] Preferably, the outer diameter of the insertion rod and the inner diameter of the positioning hole form a clearance fit, and the length of the insertion rod is greater than the sum of the thicknesses of the first annular base and the second annular base.

[0011] Preferably, the elastic transition cylinder is a corrugated tube structure, and the number of corrugated tube crests is five.

[0012] Preferably, all of the elastic connecting plates are L-shaped structures, and the bending direction of the L-shaped structure is toward the axis of the elastic transition cylinder.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. In this utility model, the bellows structure of the elastic transition cylinder and the arc design of the elastic connecting plate can adapt to the radial runout and axial movement of the shaft. The elastic deformation absorbs vibration energy, reduces wear on the sealing surface, and lowers the risk of leakage.

[0015] 2. In this utility model, the axial adjustment tube, the second threaded groove, and the insert rod ensure that the main sealing ring and the auxiliary sealing ring are subjected to uniform force, thus avoiding the problem of local stress concentration in traditional bolt adjustment. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall exploded view of the compressible spring-loaded shaft seal gasket ring of this utility model;

[0017] Figure 2 This is a schematic diagram showing the overall connection structure of the compressible spring-loaded shaft seal gasket ring of this utility model;

[0018] Figure 3 This is a schematic diagram showing the overall front connection of the compressible spring-loaded shaft seal gasket ring of this utility model;

[0019] Figure 4 This is a schematic diagram of the partially disassembled connection structure of the compressible spring-loaded shaft seal gasket ring of this utility model.

[0020] In the figure: 1. First annular base; 2. Second annular base; 3. Positioning hole; 4. Insert rod; 5. First threaded groove; 6. Fastening nut; 7. Anti-slip groove; 8. Second threaded groove; 9. Axial adjustment tube; 10. Elastic transition cylinder; 11. Main sealing ring; 12. Elastic connecting plate; 13. Auxiliary sealing ring; 14. Elastic buffer ring; 15. Dustproof sealing ring. Detailed Implementation

[0021] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0022] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] Please see Figure 1-4 This utility model provides a technical solution:

[0025] A compressible, resilient shaft seal gasket ring includes a first annular base 1, a second annular base 2, and an elastic connecting plate 12. The first annular base 1 and the second annular base 2 each have a plurality of through-holes 3 at corresponding positions. Insert rods 4 are inserted into each pair of corresponding holes 3. First threaded grooves 5 are formed on the front and rear surfaces of each insert rod 4. Fastening nuts 6 are threadedly connected to each of the first threaded grooves 5. Several anti-slip grooves 7 are formed on the outer surfaces of each fastening nut 6.

[0026] In this embodiment, a second threaded groove 8 is provided in the second annular base 2. An axial adjustment tube 9 is threadedly connected to the second threaded groove 8. An elastic transition cylinder 10 is fixedly connected to the front end of the axial adjustment tube 9. A main sealing ring 11 is fixedly connected to the front end of the elastic transition cylinder 10. An auxiliary sealing ring 13 is connected to the main sealing ring 11 through an elastic connecting plate 12. An elastic buffer ring 14 is fixed to the inner wall of the auxiliary sealing ring 13. A dustproof sealing ring 15 is fixed to the inner ring of the elastic buffer ring 14.

[0027] Through the above scheme: the second threaded groove 8 is threadedly engaged with the axial adjustment tube 9. Rotating the axial adjustment tube 9 can push the elastic transition cylinder 10 to move axially, causing the main sealing ring 11 to compress the elastic connecting plate 12 and the auxiliary sealing ring 13, so that the elastic buffer ring 14 and the dustproof sealing ring 15 are tightly attached to the shaft surface. The corrugated structure of the elastic transition cylinder 10 and the deformation capability of the elastic connecting plate 12 can compensate for the shaft offset and vibration, ensuring the reliability of the seal.

[0028] In this embodiment, several elastic connecting plates 12 are provided. The rear ends of several elastic connecting plates 12 are fixedly connected to the front ends of the main sealing ring 11, and the inner wall surfaces of several elastic connecting plates 12 are fixedly connected to the outer surfaces of the auxiliary sealing ring 13. The number of positioning holes 3 of the first annular base 1 and the second annular base 2 are eight, and they are evenly distributed along the circumference. The outer diameter of the insertion rod 4 and the inner diameter of the positioning hole 3 form a clearance fit. The length of the insertion rod 4 is greater than the sum of the thicknesses of the first annular base 1 and the second annular base 2. The elastic transition cylinder 10 is a bellows structure with five corrugated peaks. The several elastic connecting plates 12 are all L-shaped structures, and the bending direction of the L-shaped structure is towards the axis of the elastic transition cylinder 10.

[0029] Through the above scheme: the elastic connecting plate 12 is L-shaped and bent towards the axis, with the rear end connected to the main sealing ring 11 and the inner wall connected to the auxiliary sealing ring 13, forming an elastic support structure. When the main sealing ring 11 is pushed by the axial adjustment tube 9, the auxiliary sealing ring 13 moves synchronously through the L-shaped elastic connecting plate 12. Its elastic deformation can compensate for the radial offset of the axis. The eight positioning holes 3 are evenly distributed to ensure the coaxiality of the first annular base 1 and the second annular base 2. The gap fit between the insertion rod 4 and the positioning hole 3 allows for fine adjustment. The length is greater than the sum of the thickness of the base to pass through and fix it. It is locked by the front and rear end fastening nuts 6 to ensure installation stability. The five-peaked bellows structure of the elastic transition cylinder 10 provides buffer through corrugated expansion and contraction during axial movement, absorbs vibration energy, and transmits axial force to the main sealing ring 11, realizing dynamic adjustment and stable support of the sealing pre-tightening force.

[0030] It should be noted that this utility model is a compressible spring-loaded shaft seal gasket ring. During use, firstly, align the eight positioning holes 3 of the first annular base 1 and the second annular base 2, insert the insert rod 4 so that it passes through both bases, and tighten the fastening nut 6 through the first threaded grooves 5 at the front and rear ends of the insert rod 4. The anti-slip groove 7 enhances the operating friction, locking the relative position of the two bases and ensuring coaxiality. The clearance between the insert rod 4 and the positioning holes 3 allows for slight adjustments to adapt to different installation scenarios. Rotate the axial adjustment tube 9, utilizing its fine-pitch thread transmission with the second threaded groove 8 to push the elastic transition cylinder 10 axially. The five-peaked bellows structure of the elastic transition cylinder 10 expands and contracts accordingly, dissipating the axial force. The force is transferred to the main sealing ring 11, which drives the auxiliary sealing ring 13 to move synchronously through the L-shaped elastic connecting plate 12, compressing the elastic buffer ring 14 and the dustproof sealing ring 15 so that they are tightly attached to the surface of the rotating shaft. The preload is controlled by threaded fine adjustment. When the equipment is running, the arc-shaped elastic deformation of the elastic connecting plate 12 and the expansion and contraction of the bellows compensate for the radial runout and vibration of the shaft in real time. The elastic buffer ring 14 provides radial preload through a rectangular or trapezoidal cross section. The inclined lip of the dustproof sealing ring 15 forms a line contact seal to prevent media leakage and impurity intrusion. The multi-stage sealing structure works together to maintain stable sealing performance in high temperature, high pressure or vibration environments and extend the maintenance cycle.

[0031] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A compressible, resilient shaft seal gasket ring, comprising a first annular base (1), a second annular base (2), and an elastic connecting plate (12), characterized in that: The first annular base (1) and the second annular base (2) are provided with a number of through-holes (3) at corresponding positions. The number of positioning holes (3) are connected to each other with a rod (4). The front and rear of the outer surfaces of the rods (4) are provided with first threaded grooves (5). The first threaded grooves (5) are threaded with fastening nuts (6). The outer surfaces of the fastening nuts (6) are provided with a number of anti-slip grooves (7). The second annular base (2) has a second threaded groove (8) inside, and the second threaded groove (8) is threadedly connected to an axial adjustment tube (9). The front end of the axial adjustment tube (9) is fixedly connected to an elastic transition cylinder (10). The front end of the elastic transition cylinder (10) is fixedly connected to a main sealing ring (11). The main sealing ring (11) is connected to an auxiliary sealing ring (13) through an elastic connecting plate (12). An elastic buffer ring (14) is fixed on the inner wall of the auxiliary sealing ring (13). A dustproof sealing ring (15) is fixed on the inner ring of the elastic buffer ring (14).

2. The compressible spring-loaded shaft seal gasket ring according to claim 1, characterized in that: The elastic connecting plate (12) is provided in a plurality of them. The rear end of the plurality of elastic connecting plates (12) is fixedly connected to the front end of the main sealing ring (11), and the inner wall surface of the plurality of elastic connecting plates (12) is fixedly connected to the outer surface of the auxiliary sealing ring (13).

3. The compressible spring-loaded shaft seal gasket ring according to claim 1, characterized in that: The first annular base (1) and the second annular base (2) each have eight positioning holes (3), which are evenly distributed along the circumference.

4. The compressible spring-loaded shaft seal gasket ring according to claim 1, characterized in that: The outer diameter of the insertion rod (4) and the inner diameter of the positioning hole (3) form a clearance fit, and the length of the insertion rod (4) is greater than the sum of the thicknesses of the first annular base (1) and the second annular base (2).

5. The compressible spring-loaded shaft seal gasket ring according to claim 1, characterized in that: The elastic transition cylinder (10) has a bellows structure, and the bellows have five crests.

6. The compressible spring-loaded shaft seal gasket ring according to claim 1, characterized in that: Several of the elastic connecting plates (12) are L-shaped structures, and the bending direction of the L-shaped structures is toward the axis of the elastic transition cylinder (10).

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