High-temperature-resistant mechanical sealing device

Abstract

The utility model discloses a high-temperature-resistant mechanical sealing device which comprises a shaft sleeve and a gland arranged on the outer side of the shaft sleeve, a cavity is formed in the gland, two channels communicated with the cavity are formed in the gland respectively, a liquid inlet connector is installed on the top of one channel, a liquid outlet connector is installed on the top of the other channel, and the liquid outlet connector is connected with the cavity. A sealing piece is movably installed in the cavity, a plurality of springs which are annularly distributed at equal intervals are arranged between the sealing piece and the gland, a compensation piece is movably arranged on the lower portion in the gland, a push ring is installed between the compensation piece and the sealing piece, a second sealing ring is installed on the side wall of the sealing piece, and third sealing rings are installed on the inner wall and the outer wall of the compensation piece. Cooling liquid can be introduced into the cavity through the gland, the liquid outlet connector and the channel to take away heat of the spring, and the problem that due to the fact that the temperature of the spring is too high, original performance is lost, pressure distribution of the end face of the mechanical seal is uneven, and even the mechanical seal completely loses efficacy, and leakage is caused is solved.

Description

Technical Field

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

[0002] A mechanical seal is a device that prevents fluid leakage by having at least one pair of end faces perpendicular to the axis of rotation that remain in close contact and slide relative to each other under the action of fluid pressure, the elastic force of a compensation mechanism, and the cooperation of an auxiliary seal. The spring is one of the key components in a mechanical seal. It ensures that a certain pressure is always maintained between the dynamic ring and the static ring by continuously applying a constant force, thereby keeping the sealing surfaces in close contact and preventing liquid or gas leakage.

[0003] When existing mechanical sealing devices work in a high-temperature environment, the high temperature will cause the fatigue strength of the spring to decrease, making the spring more susceptible to deformation or breakage. In addition, the spring will lose its original performance due to excessive temperature, which will cause uneven pressure distribution on the end face of the mechanical seal or even complete failure, thereby causing leakage problems, thereby affecting the reliability and sealing performance of the mechanical seal. Utility Model Content

[0004] The purpose of the utility model is to provide a high temperature resistant mechanical sealing device to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a high-temperature resistant mechanical sealing device, comprising a shaft sleeve and a pressure cover arranged on the outside of the shaft sleeve, a cavity is arranged inside the pressure cover, and two channels connected to the cavity are respectively arranged on the pressure cover, a liquid inlet joint is installed on the top of one of the channels, and a liquid outlet joint is installed on the top of the other channel, a sealing member is movably installed inside the cavity, a plurality of springs equidistantly distributed in an annular shape are arranged between the sealing member and the pressure cover, a compensating member is movably provided at the lower part of the pressure cover, a push ring is installed between the compensating member and the seal, a second sealing ring is installed on the side wall of the seal, and a third sealing ring is installed on the inner wall and the outer wall of the compensating member.

[0006] As a preferred solution of the present utility model, the cavity is an annular structure.

[0007] As a preferred solution of the utility model, a dynamic ring is installed at the bottom of the outer side of the shaft sleeve, and a transmission pin is installed between the dynamic ring and the shaft sleeve.

[0008] As a preferred solution of the utility model, a static ring is installed on the outer side of the sleeve and below the compensating member, the static ring and the dynamic ring form a sealing end face, and a fourth sealing ring is provided between the compensating member and the static ring.

[0009] As a preferred solution of the utility model, a first sealing ring is provided between the moving ring and the shaft sleeve.

[0010] As a preferred solution of the utility model, a pressure ring is installed on the top of the pressure cover, a second screw is threadedly connected between the pressure ring and the pressure cover, and a plurality of fixing holes are penetrated through the pressure cover.

[0011] As a preferred solution of the utility model, a sleeve ring is sleeved on the top of the shaft sleeve, and a first screw is threadedly connected between the sleeve ring and the shaft sleeve.

[0012] Compared with the prior art, the utility model has the following beneficial effects: the utility model can introduce coolant into the cavity through the provided pressure cover, liquid outlet joint and channel to take away the heat of the spring, thereby preventing the spring from losing its original performance due to excessive temperature, reducing the fatigue strength of the spring, making the spring more susceptible to deformation or breakage, resulting in uneven pressure distribution on the end face of the mechanical seal, or even complete failure, which in turn causes leakage problems. At the same time, it can prevent the spring from aging rapidly and extend its service life, thereby improving the reliability of the mechanical seal. In addition, the provided seal, second sealing ring and third sealing ring can play a multiple sealing role to prevent leakage of the coolant. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0014] Figure 2 It is a front cross-sectional view of the utility model;

[0015] Figure 3 For this utility model Figure 2 Enlarged view of point A in the middle.

[0016] In the figure: 1. sleeve; 2. sleeve ring; 3. first screw; 4. liquid inlet joint; 5. second screw; 6. pressure ring; 7. pressure cover; 8. liquid outlet joint; 9. fixing hole; 10. compensation part; 11. static ring; 12. dynamic ring; 13. channel; 14. transmission pin; 15. first sealing ring; 16. cavity; 17. spring; 18. sealing member; 19. push ring; 20. second sealing ring; 21. third sealing ring; 22. fourth sealing ring. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0018] See also Figures 1 to 3 The utility model provides a technical solution: a high temperature resistant mechanical seal device, comprising a shaft sleeve 1 and a gland 7 arranged on the outside of the shaft sleeve 1, the shaft sleeve 1 and the gland 7 can rotate relative to each other, a cavity 16 is arranged inside the gland 7, two channels 13 connected with the cavity 16 are respectively arranged on the gland 7, a liquid inlet joint 4 is installed on the top of one of the channels 13, and a liquid outlet joint 8 is installed on the top of the other channel 13, the coolant can enter the channel 13 through the liquid inlet joint 4 and flow into the cavity 16, after the coolant absorbs the heat of the spring 17, it flows out of the cavity 16 through the channel 13 and the liquid outlet joint 8, taking away the heat of the spring 17, avoiding the spring 17 from losing its original performance due to excessive temperature, resulting in uneven end face pressure distribution of the mechanical seal, or even complete failure, thereby causing leakage problems, and at the same time preventing the spring 17 from accelerating aging and extending its service life, thereby improving the reliability of the mechanical seal, and the cavity 16 is movably installed with a seal 18 The seal 18 plays a sealing role to prevent the coolant in the cavity 16 from leaking. A plurality of springs 17 equidistantly distributed in an annular shape are arranged between the seal 18 and the gland 7. The spring 17 is used to apply pressure to the seal 18. The seal 18 applies pressure to the compensating member 10 through the push ring 19. The compensating member 10 applies pressure to the static ring 11, thereby generating a pressing force between the static ring 11 and the dynamic ring 12, so that the static ring 11 is close to the dynamic ring 12 to achieve the purpose of sealing. A compensating member 10 is movably arranged at the lower part of the gland 7. A push ring 19 is installed between the compensating member 10 and the seal 18. A second sealing ring 20 is installed on the side wall of the seal 18. The second sealing ring 20 can improve the sealing between the seal 18 and the gland 7, further reducing the possibility of cooling leakage. A third sealing ring 21 is installed on the inner wall and the outer wall of the compensating member 10. The third sealing ring 21 is used to improve the sealing between the compensating member 10 and the gland 7 to prevent the coolant in the cavity 16 from leaking.

[0019] The cavity 16 is an annular structure, which facilitates the circulation of the cooling liquid in the cavity 16 .

[0020] A moving ring 12 is installed at the bottom of the outer side of the sleeve 1 , and a driving pin 14 is installed between the moving ring 12 and the sleeve 1 . The driving pin 14 enables the moving ring 12 to rotate together with the sleeve 1 .

[0021] Among them, a stationary ring 11 is installed on the outside of the sleeve 1 and below the compensating part 10. The stationary ring 11 and the dynamic ring 12 form a sealing end face. A fourth sealing ring 22 is provided between the compensating part 10 and the stationary ring 11. The fourth sealing ring 22 is used to improve the sealing between the compensating part 10 and the stationary ring 11.

[0022] A first sealing ring 15 is provided between the dynamic ring 12 and the shaft sleeve 1 , and the first sealing ring 15 is used to improve the sealing performance between the dynamic ring 12 and the shaft sleeve 1 .

[0023] Among them, a pressing ring 6 is installed on the top of the pressure cover 7, and a second screw 5 is threadedly connected between the pressure ring 6 and the pressure cover 7. The second screw 5 is used to fix the pressure ring 6 on the pressure cover 7. A plurality of fixing holes 9 are penetrated on the pressure cover 7, and the fixing holes 9 facilitate the installation and fixation of the pressure cover 7.

[0024] Among them, a sleeve ring 2 is sleeved on the top of the sleeve 1, and a first screw 3 is threadedly connected between the sleeve ring 2 and the sleeve 1. The first screw 3 is used to fix the sleeve ring 2 on the sleeve 1.

[0025] Specifically, when in use, the external coolant pipeline is connected to the liquid inlet joint 4, and the recovery pipeline is connected to the liquid outlet joint 8. The coolant enters the cavity 16 through the liquid inlet joint 4 and the channel 13, and the coolant absorbs the heat of the spring 17. Then the coolant flows out from the liquid outlet joint 8 to avoid leakage when the spring 17 loses its original performance due to excessive temperature. In addition, under the multiple sealing effects of the seal 18, the second sealing ring 20 and the third sealing ring 21, the coolant will not leak.

[0026] In the description of the present invention, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inside", "front", "center", "both ends" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0027] In addition, the terms "first", "second", "third" and "fourth" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first", "second", "third" and "fourth" may explicitly or implicitly include at least one of such features.

[0028] In the present utility model, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated 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 the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the utility model according to the specific circumstances.

[0029] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high temperature resistant mechanical sealing device, comprising a shaft sleeve (1) and a gland (7) arranged outside the shaft sleeve (1), characterized in that: The gland (7) is provided with a cavity (16) inside, and two channels (13) connected to the cavity (16) are provided on the gland (7), wherein a liquid inlet joint (4) is installed at the top of one of the channels (13), and a liquid outlet joint (8) is installed at the top of the other channel (13). A sealing member (18) is movably installed inside the cavity (16), and a plurality of springs (17) are equidistantly distributed in an annular shape are provided between the sealing member (18) and the gland (7). A compensating member (10) is movably provided at the lower part of the gland (7), and a push ring (19) is installed between the compensating member (10) and the sealing member (18). A second sealing ring (20) is installed on the side wall of the sealing member (18), and a third sealing ring (21) is installed on the inner wall and the outer wall of the compensating member (10).

2. A high temperature resistant mechanical sealing device according to claim 1, characterized in that: The cavity (16) is an annular structure.

3. A high temperature resistant mechanical sealing device according to claim 1, characterized in that: A moving ring (12) is installed at the bottom of the outer side of the shaft sleeve (1), and a driving pin (14) is installed between the moving ring (12) and the shaft sleeve (1).

4. A high temperature resistant mechanical sealing device according to claim 1, characterized in that: A stationary ring (11) is installed on the outer side of the shaft sleeve (1) and below the compensating member (10); the stationary ring (11) and the dynamic ring (12) form a sealing end face; a fourth sealing ring (22) is provided between the compensating member (10) and the stationary ring (11).

5. A high temperature resistant mechanical sealing device according to claim 4, characterized in that: A first sealing ring (15) is provided between the moving ring (12) and the shaft sleeve (1).

6. A high temperature resistant mechanical sealing device according to claim 1, characterized in that: A pressure ring (6) is installed on the top of the pressure cover (7), a second screw (5) is threadedly connected between the pressure ring (6) and the pressure cover (7), and a plurality of fixing holes (9) are penetrated through the pressure cover (7).

7. A high temperature resistant mechanical sealing device according to claim 1, characterized in that: A sleeve ring (2) is sleeved on the top of the shaft sleeve (1), and a first screw (3) is threadedly connected between the sleeve ring (2) and the shaft sleeve (1).

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