Double-end-face sealing element with cooling circulation

Abstract

The utility model relates to the technical field related to sealing, in particular to a double-end-face sealing piece with a cooling circulation function. The left side outside the shaft sleeve is sleeved with a first movable ring; a second sealing ring is mounted between the first moving ring and the shaft sleeve; a screw mechanism is processed in the middle of the outer surface of the shaft sleeve; a gland is rotationally mounted on the shaft sleeve through a screw mechanism; a gland pad is attached to the side wall of the gland. The right side outside the shaft sleeve is sleeved with a second movable ring; a first static ring is arranged between the first movable ring outside the shaft sleeve and the gland; a second static ring is mounted between the gland outside the shaft sleeve and the second moving ring; a transmission ring sleeves the right end part of the shaft sleeve; the double-end-face sealing piece with the cooling circulation function is reasonable in structure, good in heat dissipation effect and capable of prolonging the service life of a mechanical seal and reducing the failure rate of the mechanical seal.

Description

Technical Field

[0001] The utility model belongs to the technical field related to sealing, and in particular relates to a double-end face sealing component with a cooling cycle. Background Art

[0002] The existing mechanical seal structure has low heat dissipation efficiency, mainly because the contact surface between the mechanical seal and the flushing medium is small, and the water flow is circulated by pressurizing the flushing system. Once the pressure is lost or the flushing system fails and stops running, it will cause devastating damage to the mechanical seal. The principle of mechanical seal means that the flushing scheme plays a vital role in the sealing effect. Once the flushing and heat dissipation equipment stops running, while the mechanical equipment is still running, the mechanical seal will dry grind, causing irreversible and serious damage to the mechanical seal within 30 seconds, resulting in leakage. The process is very fast, and it is often too late to make effective remedial operations in time, which in turn causes a series of safety accidents and economic losses. Utility Model Content

[0003] The utility model aims to provide a double-end face seal with cooling cycle which has reasonable structure, good heat dissipation effect, can increase the service life of mechanical seal and can reduce the failure rate of mechanical seal.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a double-end face seal with a cooling cycle, comprising a first sealing ring, a sleeve, a second sealing ring, a first dynamic ring, a first static ring, a pressure cover, a second static ring, a third sealing ring, a second dynamic ring, a transmission ring and a spiral mechanism, wherein the sleeve adopts a structure with a hollow interior and open ends; the first sealing ring is embedded and installed inside the sleeve; the first dynamic ring is sleeved on the left side of the exterior of the sleeve; the second sealing ring is installed between the first dynamic ring and the sleeve; a spiral mechanism is processed on the middle position of the outer surface of the sleeve; the sleeve is rotatably installed with a pressure cover through the spiral mechanism; a pressure cover gasket is attached to the side wall of the pressure cover; the second dynamic ring is sleeved on the right side of the exterior of the sleeve; the first static ring is installed between the first dynamic ring and the pressure cover outside the sleeve; the second static ring is installed between the pressure cover and the second dynamic ring outside the sleeve; the transmission ring is sleeved and installed on the right end of the sleeve; and the third sealing ring is installed between the transmission ring and the second dynamic ring.

[0005] As a further improvement of the utility model, the gland and the transmission ring are installed together by overlapping with positioning blocks.

[0006] As a further improvement of the utility model, a groove structure is provided at the extended portion of the lower end of the transmission ring and a retaining spring is installed in the groove structure via a set screw.

[0007] As a further improvement of the utility model, the surface of the positioning block is fixedly mounted on the upper part of the transmission ring by means of cylindrical head screws.

[0008] As a further improvement of the present invention, a fourth sealing ring is installed between the inner side wall of the transmission ring and the outer side wall of the shaft sleeve.

[0009] As a further improvement of the utility model, a fifth sealing ring is installed between the gland and the first stationary ring, and between the gland and the second stationary ring.

[0010] As a further improvement of the present invention, the adjacent ends of the first stationary ring and the second stationary ring are connected to each other via a spring.

[0011] As a further improvement of the utility model, the upper end of the gland is provided with a liquid inlet; the lower end of the gland is provided with a liquid outlet.

[0012] As a further improvement of the present invention, the first sealing ring, the second sealing ring, the third sealing ring, the fourth sealing ring and the fifth sealing ring all adopt an O-type rubber sealing ring structure.

[0013] Compared with the prior art, the beneficial effects of the utility model are as follows: the technical solution sets up a spiral self-circulating structure, and utilizes the flow impact force of the flowing liquid entering and exiting the device to drive the rotatable spiral structure to move. In theory, it will not be damaged, and the simple pure mechanical structure brings more stable reliability; the technical solution has a forced self-circulation effect, and the better heat exchange efficiency greatly extends the service life of the mechanical seal. The forced self-circulation reduces the requirements of the mechanical seal support system. Even if the support system is damaged or the power is off, the cooling medium can still be continuously flushed and keep running with the main shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall internal structure of the utility model.

[0015] Figure 2 It is a schematic diagram of the structure of the right side end portion of the shaft sleeve of the utility model.

[0016] In the figure: 1. first sealing ring; 2. sleeve; 3. second sealing ring; 4. first moving ring; 5. first stationary ring; 6. gland; 7. second stationary ring; 8. third sealing ring; 9. second moving ring; 10. positioning block; 11. cylindrical head screw; 12. transmission ring; 13. retaining ring; 14. set screw; 15. fourth sealing ring; 16. fifth sealing ring; 17. spring; 18. spiral mechanism; 19. liquid inlet; 20. liquid outlet. 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 Figure 1 to Figure 2 The utility model provides a technical solution: a double-end face seal with cooling cycle, including a first sealing ring 1, a sleeve 2, a second sealing ring 3, a first dynamic ring 4, a first static ring 5, a pressure cover 6, a second static ring 7, a third sealing ring 8, a second dynamic ring 9, a transmission ring 12 and a spiral mechanism 18. The sleeve 2 adopts a structure with a hollow interior and open ends; the first sealing ring 1 is embedded and installed inside the sleeve 2; the first dynamic ring 4 is sleeved on the left side of the outer side of the sleeve 2; the second sealing ring 3 is installed between the first dynamic ring 4 and the sleeve 2; the middle part of the outer surface of the sleeve 2 The shaft sleeve 2 is provided with a spiral mechanism 18; the shaft sleeve 2 is rotatably installed with a gland 6 through the spiral mechanism 18; the side wall of the gland 6 is fitted with a gland gasket; the outer right side of the shaft sleeve 2 is sleeved with a second dynamic ring 9; the first static ring 5 is installed between the first dynamic ring 4 outside the shaft sleeve 2 and the gland 6; the second static ring 7 is installed between the gland 6 outside the shaft sleeve 2 and the second dynamic ring 9; the right end of the shaft sleeve 2 is sleeved with a transmission ring 12; the third sealing ring 8 is installed between the transmission ring 12 and the second dynamic ring 9; the gland 6 and the transmission ring 12 are overlapped and installed together by using a positioning block 10.

[0019] A groove structure is provided at the lower extension of the transmission ring 12 and a retaining ring 13 is installed in the groove structure via a set screw 14 ; the surface of the positioning block 10 is fixedly installed on the upper part of the transmission ring 12 via a cylindrical head screw 11 .

[0020] A fourth sealing ring 15 is installed between the inner wall of the transmission ring 12 and the outer wall of the shaft sleeve 2 ; a fifth sealing ring 16 is installed between the gland 6 and the first stationary ring 5 , and between the gland 6 and the second stationary ring 7 .

[0021] The adjacent ends of the first stationary ring 5 and the second stationary ring 7 are connected to each other through a spring 17; a liquid inlet 19 is provided at the upper end of the pressure cover 6; a liquid outlet 20 is provided at the lower end of the pressure cover 6; the first sealing ring 1, the second sealing ring 3, the third sealing ring 8, the fourth sealing ring 15 and the fifth sealing ring 5 all adopt an O-type rubber sealing ring structure.

[0022] This technical solution improves the internal structure design, which has the benefit of increasing the size of the internal cavity to accommodate more cooling medium, directly improving the heat exchange efficiency. In addition, this technical solution adds a sleeve with a spiral structure inside, which will rotate with the main shaft. The direction of the spiral is opposite to that of the cooling medium, which means that the cooling medium will continue to circulate until the main shaft stops rotating. This directly solves the problem of continuous flushing of the mechanical seal when the cooling flushing system occasionally fails and stops running.

[0023] The O-rings used in this technical solution are static seals. The dynamic and static rings form a liquid film on the friction end faces through mutual friction, which is the dynamic sealing point. The flushing medium is the source of the liquid film, which lubricates the dynamic sealing point and has a good heat dissipation effect. The spring provides compensation for the two static rings, so that the end faces always fit together evenly to ensure the sealing effect. The spiral sleeve is driven by the rotation of the main shaft of the mechanical equipment. When the spiral rotation direction is opposite to the flushing medium, it will drive the circulation of the flushing medium, perfectly overcoming the previous technical shortcomings.

[0024] The above description is only a preferred example of the present invention and is not intended to limit the present invention. Although the present invention is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions described in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A double end seal with cooling cycle, characterized in that: The invention comprises a first sealing ring (1), a shaft sleeve (2), a second sealing ring (3), a first moving ring (4), a first stationary ring (5), a pressure cover (6), a second stationary ring (7), a third sealing ring (8), a second moving ring (9), a transmission ring (12) and a spiral mechanism (18), wherein the shaft sleeve (2) has a hollow interior and is open at both ends; the first sealing ring (1) is embedded and installed inside the shaft sleeve (2); the first moving ring (4) is sleeved on the left side of the exterior of the shaft sleeve (2); the second sealing ring (3) is installed between the first moving ring (4) and the shaft sleeve (2); the spiral mechanism (18) is processed at the middle position of the outer surface of the shaft sleeve (2); 8); the shaft sleeve (2) is rotatably mounted with a pressure cover (6) through a screw mechanism (18); a pressure cover gasket is attached to the side wall of the pressure cover (6); a second moving ring (9) is sleeved on the right side of the outside of the shaft sleeve (2); a first stationary ring (5) is installed between the first moving ring (4) outside the shaft sleeve (2) and the pressure cover (6); a second stationary ring (7) is installed between the pressure cover (6) outside the shaft sleeve (2) and the second moving ring (9); a transmission ring (12) is sleeved on the right end of the shaft sleeve (2); a third sealing ring (8) is installed between the transmission ring (12) and the second moving ring (9).

2. A double end seal with cooling cycle according to claim 1, characterized in that: The gland (6) and the transmission ring (12) are mounted together by overlapping with a positioning block (10).

3. A double end seal with cooling cycle according to claim 2, characterized in that: A groove structure is provided at the extended portion of the lower end of the transmission ring (12), and a retaining spring (13) is installed in the groove structure via a set screw (14).

4. A double end seal with cooling cycle according to claim 3, characterized in that: The surface of the positioning block (10) is fixedly mounted on the upper part of the transmission ring (12) by means of cylindrical head screws (11).

5. A double end seal with cooling cycle according to claim 4, characterized in that: A fourth sealing ring (15) is installed between the inner wall of the transmission ring (12) and the outer wall of the shaft sleeve (2).

6. A double end seal with cooling cycle according to claim 5, characterized in that: A fifth sealing ring (16) is installed between the gland (6) and the first stationary ring (5), and between the gland (6) and the second stationary ring (7).

7. A double end seal with cooling cycle according to claim 1, characterized in that: The adjacent ends of the first stationary ring (5) and the second stationary ring (7) are connected to each other via a spring (17).

8. The double end seal with cooling cycle according to claim 1, characterized in that: The upper end of the pressure cover (6) is provided with a liquid inlet (19); and the lower end of the pressure cover (6) is provided with a liquid outlet (20).

9. A double end seal with cooling cycle according to claim 6, characterized in that: The first sealing ring (1), the second sealing ring (3), the third sealing ring (8), the fourth sealing ring (15) and the fifth sealing ring (16) all adopt an O-type rubber sealing ring structure.

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