Mechanical seal suitable for narrow filling culvert

Abstract

The utility model relates to the technical field of mechanical seals, and discloses a mechanical seal suitable for a narrow packing culvert, which comprises a shaft sleeve, a first fixing ring fixedly mounted on the inner side of the shaft sleeve, a second fixing ring fixedly mounted on the inner side of the shaft sleeve, a driving ring fixedly mounted on the outer side of the shaft sleeve, and a main static ring arranged on the outer side of the driving ring. A third fixing ring is fixedly installed in the shaft sleeve, a push ring is fixedly installed in the shaft sleeve, a fourth fixing ring is fixedly installed on the outer side of the shaft sleeve, a spring is fixedly installed in the shaft sleeve, an auxiliary static ring is fixedly installed on the outer side of the spring, a first positioning ring is fixedly installed in the shaft sleeve, and a positioning clamp is arranged on the outer side of the shaft sleeve. The mechanical seal suitable for the narrow packing culvert is provided. The compact shaft sleeve and a plurality of fixing rings and positioning rings are arranged to adapt to a narrow pump cavity, the push ring can be conveniently installed through the split flange, the flushing cooling hole is formed, sealing can be normally used, effective cooling and lubricating can be provided, and overheating and damage of parts are prevented.

Description

Technical Field

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

[0002] Mechanical seal, whose full name is mechanical seal, is generally called mechanical seal in the industry. It is a device used to solve the sealing problem between the rotating shaft and the machine body. It consists of at least one pair of end faces perpendicular to the rotating axis, which maintain contact and relative sliding under the action of fluid pressure, the elastic force of the compensation mechanism and the cooperation of auxiliary seals to prevent fluid leakage.

[0003] Although the existing technology can provide normal sealing for the machine, it is necessary to modify the structure of the original pump to adapt it to a mechanical seal, which is not convenient for adapting to the narrow pump chamber, resulting in greater overall limitations. In addition, in the existing technology, it is not convenient to install the push ring on the split flange, and there is no flushing port designed, which affects normal use. Summary of the invention

[0004] The technical problem to be solved by the utility model is to provide a mechanical seal suitable for a narrow stuffing box, which can effectively solve the problems in the prior art that it is not convenient to adapt to a narrow pump chamber, it is not convenient to install a push ring on a split flange, and there is no flushing port.

[0005] The technical scheme adopted by the utility model is: a mechanical seal suitable for a narrow stuffing box, comprising a sleeve, a fixing ring 1 is fixedly installed on the inner side of the sleeve, a fixing ring 2 is fixedly installed on the inner side of the sleeve, an active ring is fixedly installed on the outer side of the sleeve, a main static ring is arranged on the outer side of the active ring, a fixing ring 3 is fixedly installed inside the sleeve, a push ring is fixedly installed inside the sleeve, a fixing ring 4 is fixedly installed on the outer side of the sleeve, a spring is fixedly installed inside the sleeve, a secondary static ring is fixedly installed on the outer side of the spring, a positioning ring 1 is fixedly installed inside the sleeve, a positioning clip is arranged on the outer side of the positioning clip, a hexagonal screw 1 is arranged on the outer side of the positioning clip, a set screw is fixedly installed inside the sleeve, a hexagonal screw 2 is arranged on the outer side of the positioning clip, a driving ring is fixedly installed on the outer side of the sleeve, a positioning ring 2 is fixedly installed on the bottom of the driving ring, a secondary dynamic ring is arranged on the bottom of the driving ring, an anti-rotation pin is arranged inside the secondary dynamic ring, a connecting flange is arranged on the bottom of the secondary dynamic ring, a positioning ring 3 is fixedly installed on the outer side of the connecting flange, a static ring seat is fixedly installed on the outer side of the connecting flange, and a flushing and cooling hole is opened on the connecting flange.

[0006] Preferably, the positioning clip is in an "L"-shaped structure, the second hexagonal screw passes through the positioning clip and extends to the interior of the sleeve, and the first hexagonal screw passes through the positioning clip and extends to the interior of the connecting flange.

[0007] Through the above technical solution, through the design of the positioning clip, the second hexagonal screw can play a fixing role for the sleeve, and the first hexagonal screw can play a fixing role for the connecting flange, which can ensure the accurate alignment and connection between the positioning clip and the sleeve and the connecting flange, thereby improving the stability and sealing effect of the seal.

[0008] Preferably, the set screws penetrate the connecting flange and extend to the interior of the sleeve, and a plurality of the set screws are provided, and the plurality of the set screws are distributed in a ring shape.

[0009] Through the above technical solution, through the design of the set screw, not only can the pressure be evenly dispersed and the sealing effect and stability between the connecting flange and the shaft sleeve be enhanced, but also the push ring can be easily installed through the split connecting flange.

[0010] Preferably, the stationary ring seat is located at the bottom of the connecting flange, and the flushing cooling hole has a "circular" structure.

[0011] Through the above technical solution, through the design of the stationary ring seat, combined with the circular structure of the flushing cooling hole, not only can effective cooling and lubrication be provided while ensuring sealing, thereby preventing overheating and damage of components.

[0012] Preferably, the fixing ring 1, the fixing ring 2, the fixing ring 3 and the fixing ring 4 are in a "circular" structure, and the fixing ring 1, the fixing ring 2, the fixing ring 3 and the fixing ring 4 are made of hexafluoropropylene copolymer rubber material.

[0013] Through the above technical scheme, the fixing rings 1, 2, 3 and 4 made of hexafluoropropylene copolymer rubber material can effectively protect the connection parts and extend the service life because of their good corrosion resistance and wear resistance, so they are suitable for corrosive liquids containing particles and improve the diversity of use of the overall device.

[0014] Preferably, the auxiliary dynamic ring and the anti-rotation pin are matched, and the positioning ring three is located between the connecting flange and the stationary ring seat.

[0015] Through the above technical solution, through the design of the secondary dynamic ring and the anti-rotation pin, not only can the accurate matching between the axial position of the secondary dynamic ring and the static ring seat be ensured, but the presence of the anti-rotation pin can effectively prevent the secondary dynamic ring from rotating during use.

[0016] Preferably, the second positioning ring is located between the driving ring and the auxiliary dynamic ring, and the stationary ring seat is made of 304 stainless steel.

[0017] Through the above technical solution, the presence of the second positioning ring helps to maintain the stability of the sealing gap between the drive ring and the auxiliary dynamic ring, which can not only effectively prevent leakage and provide a lasting seal, but also the stationary ring seat is made of 304 stainless steel material, which has good corrosion resistance and wear resistance, so that the stationary ring seat can maintain its structural integrity and stability during long-term use, thereby extending the life of the mechanical seal.

[0018] Compared with the prior art, the utility model provides a mechanical seal suitable for narrow stuffing jars, which has the following beneficial effects:

[0019] 1. This mechanical seal is suitable for narrow stuffing boxes. It is equipped with a compact sleeve and multiple fixing rings and positioning rings to adapt to the narrow pump chamber. The split flange is convenient for installing the push ring and flushing cooling holes are set to ensure the normal use of the seal. It can also provide effective cooling and lubrication to prevent overheating and damage of components.

[0020] 2. This mechanical seal, which is suitable for narrow stuffing boxes, helps to maintain the stability of the sealing gap between the drive ring and the auxiliary dynamic ring through the presence of the second positioning ring, which can not only effectively prevent leakage and provide a lasting seal, but also through the design of the auxiliary dynamic ring and the anti-rotation pin, it can not only ensure that the axial position of the auxiliary dynamic ring is accurately matched with the static ring seat, but also the presence of the anti-rotation pin can effectively prevent the auxiliary dynamic ring from rotating during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The three-dimensional structure of the utility model is shown in FIG. Figure 1 ;

[0022] Figure 2 The three-dimensional structure of the utility model is shown in FIG. Figure 2 ;

[0023] Figure 3 The three-dimensional structure of the utility model is shown in FIG. Figure 3 ;

[0024] Figure 4 This is a schematic diagram of the cross-sectional structure of the utility model;

[0025] Figure 5 For this utility model Figure 4 Enlarged structural diagram at A in the middle.

[0026] Among them: 1. Bushing; 2. Fixed ring 1; 3. Fixed ring 2; 4. Active ring; 5. Main static ring; 6. Fixed ring 3; 7. Push ring; 8. Fixed ring 4; 9. Spring; 10. Auxiliary static ring; 11. Positioning ring 1; 12. Positioning clip; 13. Hexagonal screw 1; 14. Set screw; 15. Hexagonal screw 2; 16. Driving ring; 17. Positioning ring 2; 18. Auxiliary dynamic ring; 19. Anti-rotation pin; 20. Connecting flange; 21. Positioning ring 3; 22. Static ring seat; 23. Flushing cooling hole. DETAILED DESCRIPTION

[0027] 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.

[0028] Embodiment 1: Figure 1-5 As shown, the utility model provides a mechanical seal suitable for a narrow stuffing jar, including a sleeve 1, a fixing ring 1 2 is fixedly installed on the inner side of the sleeve 1, a fixing ring 2 3 is fixedly installed on the inner side of the sleeve 1, an active ring 4 is fixedly installed on the outer side of the sleeve 1, a main static ring 5 is arranged on the outer side of the active ring 4, a fixing ring 3 6 is fixedly installed inside the sleeve 1, a push ring 7 is fixedly installed inside the sleeve 1, a fixing ring 4 8 is fixedly installed on the outer side of the sleeve 1, a spring 9 is fixedly installed inside the sleeve 1, a secondary static ring 10 is fixedly installed on the outer side of the spring 9, a positioning ring 11 is fixedly installed inside the sleeve 1, and a positioning clip 1 is arranged on the outer side of the sleeve 1 2. A hexagonal screw 13 is arranged on the outer side of the positioning clip 12, a set screw 14 is fixedly installed inside the sleeve 1, a hexagonal screw 2 15 is arranged on the outer side of the positioning clip 12, a driving ring 16 is fixedly installed on the outer side of the sleeve 1, a positioning ring 2 17 is fixedly installed on the bottom of the driving ring 16, an auxiliary dynamic ring 18 is arranged on the bottom of the driving ring 16, an anti-rotation pin 19 is arranged inside the auxiliary dynamic ring 18, a connecting flange 20 is arranged on the bottom of the auxiliary dynamic ring 18, a positioning ring 3 21 is fixedly installed on the outer side of the connecting flange 20, a static ring seat 22 is fixedly installed on the outer side of the connecting flange 20, and a flushing cooling hole 23 is opened on the connecting flange 20.

[0029] Specifically, the positioning clip 12 has an "L"-shaped structure, the hexagonal screw 15 passes through the positioning clip 12 and extends to the inside of the sleeve 1, and the hexagonal screw 13 passes through the positioning clip 12 and extends to the inside of the connecting flange 20. The advantage is that through the design of the positioning clip 12, the hexagonal screw 15 can fix the sleeve 1, and the hexagonal screw 13 can fix the connecting flange 20, which can ensure the accurate alignment and connection between the positioning clip 12 and the sleeve 1 and the connecting flange 20, thereby improving the stability and sealing effect of the seal.

[0030] Specifically, the set screws 14 penetrate the connecting flange 20 and extend to the interior of the sleeve 1. The set screws 14 are provided in a plurality, and the plurality of set screws 14 are distributed in a ring shape. The advantage is that, through the design of the set screws 14, not only can the pressure be evenly dispersed, the sealing effect and stability between the connecting flange 20 and the sleeve 1 be enhanced, but also the push ring 7 can be easily installed through the split connecting flange 20.

[0031] Specifically, the stationary ring seat 22 is located at the bottom of the connecting flange 20, and the flushing cooling hole 23 is a "circular" structure. The advantage is that the design of the stationary ring seat 22, combined with the circular structure of the flushing cooling hole 23, can not only ensure sealing, but also provide effective cooling and lubrication to prevent overheating and damage of components.

[0032] Embodiment 2: Figure 2-5 As shown, as an improvement to the previous embodiment.

[0033] Specifically, the fixing ring 1 2, the fixing ring 2 3, the fixing ring 3 6 and the fixing ring 4 8 are in a "circular" structure, and the fixing ring 1 2, the fixing ring 2 3, the fixing ring 3 6 and the fixing ring 4 8 are made of hexafluoropropylene copolymer rubber material. The advantage is that the fixing ring 1 2, the fixing ring 2 3, the fixing ring 3 6 and the fixing ring 4 8 made of hexafluoropropylene copolymer rubber material have good corrosion resistance and wear resistance, can effectively protect the connection parts and extend the service life, so that they are suitable for corrosive liquids containing particles, and improve the diversity of use of the overall device.

[0034] Specifically, the secondary dynamic ring 18 and the anti-rotation pin 19 are matched with each other, and the positioning ring three 21 is located between the connecting flange 20 and the stationary ring seat 22. The advantage is that, through the design of the secondary dynamic ring 18 and the anti-rotation pin 19, not only can the axial position of the secondary dynamic ring 18 and the stationary ring seat 22 be accurately matched, but the existence of the anti-rotation pin 19 can effectively prevent the secondary dynamic ring 18 from rotating during use.

[0035] Specifically, the positioning ring 17 is located between the drive ring 16 and the auxiliary movable ring 18, and the stationary ring seat 22 is made of 304 stainless steel. The advantage is that the presence of the positioning ring 17 helps to maintain the stability of the sealing gap between the drive ring 16 and the auxiliary movable ring 18, which can not only effectively prevent leakage and provide a durable seal, but also the stationary ring seat 22 is made of 304 stainless steel, which has good corrosion resistance and wear resistance, so that the stationary ring seat 22 can maintain its structural integrity and stability during long-term use, thereby extending the life of the mechanical seal.

[0036] Working principle: When in use, the design of the positioning clip 12 can make the hexagonal screw 2 15 fix the shaft sleeve 1, and the hexagonal screw 13 can fix the connecting flange 20, which can ensure the accurate alignment and connection between the positioning clip 12 and the shaft sleeve 1 and the connecting flange 20, and improve the stability and sealing effect of the seal. The design of the set screw 14 can not only evenly disperse the pressure and enhance the sealing effect and stability between the connecting flange 20 and the shaft sleeve 1, but also facilitate the installation of the push ring 7 through the split connecting flange 20. The design of the static ring seat 22, combined with the circular structure of the flushing cooling hole 23, can not only provide effective cooling and lubrication while ensuring the sealing, but also prevent the parts from overheating and damage. The fixing ring 1 2, the fixing ring 2 3, the fixing ring 3 6 and the fixing ring made of hexafluoropropylene copolymer rubber material The fixed ring 4 8 has good corrosion resistance and wear resistance, can effectively protect the connection parts and extend the service life, so it is suitable for corrosive liquids containing particles and improves the diversity of use of the overall device. Through the design of the auxiliary dynamic ring 18 and the anti-rotation pin 19, not only can the axial position of the auxiliary dynamic ring 18 and the static ring seat 22 be accurately matched, but the presence of the anti-rotation pin 19 can effectively prevent the auxiliary dynamic ring 18 from rotating during use. The presence of the positioning ring 2 17 helps to maintain the stability of the sealing gap between the drive ring 16 and the auxiliary dynamic ring 18, which can not only effectively prevent leakage and provide a long-lasting seal, but also the static ring seat 22 is made of 304 stainless steel material, which has good corrosion resistance and wear resistance, which enables the static ring seat 22 to maintain its structural integrity and stability during long-term use and extend the life of the mechanical seal.

[0037] 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 mechanical seal suitable for a narrow stuffing box, comprising a sleeve (1), characterized in that: A fixing ring 1 (2) is fixedly installed on the inner side of the shaft sleeve (1), a fixing ring 2 (3) is fixedly installed on the inner side of the shaft sleeve (1), an active ring (4) is fixedly installed on the outer side of the shaft sleeve (1), a main static ring (5) is arranged on the outer side of the active ring (4), a fixing ring 3 (6) is fixedly installed on the inner side of the shaft sleeve (1), a push ring (7) is fixedly installed on the inner side of the shaft sleeve (1), a fixing ring 4 (8) is fixedly installed on the outer side of the shaft sleeve (1), a spring (9) is fixedly installed on the inner side of the shaft sleeve (1), a secondary static ring (10) is fixedly installed on the outer side of the spring (9), a positioning ring 1 (11) is fixedly installed on the inner side of the shaft sleeve (1), a positioning clip (12) is arranged on the outer side of the shaft sleeve (1), and a A hexagonal screw (13) is provided, a set screw (14) is fixedly installed inside the shaft sleeve (1), a hexagonal screw (15) is arranged on the outside of the positioning clip (12), a driving ring (16) is fixedly installed on the outside of the shaft sleeve (1), a positioning ring (17) is fixedly installed on the bottom of the driving ring (16), an auxiliary dynamic ring (18) is arranged on the bottom of the driving ring (16), an anti-rotation pin (19) is arranged inside the auxiliary dynamic ring (18), a connecting flange (20) is arranged on the bottom of the auxiliary dynamic ring (18), a positioning ring (21) is fixedly installed on the outside of the connecting flange (20), a stationary ring seat (22) is fixedly installed on the outside of the connecting flange (20), and a flushing cooling hole (23) is opened on the connecting flange (20).

2. A mechanical seal suitable for a narrow stuffing box according to claim 1, characterized in that: The positioning clip (12) is in an "L"-shaped structure, the second hexagonal screw (15) passes through the positioning clip (12) and extends to the interior of the shaft sleeve (1), and the first hexagonal screw (13) passes through the positioning clip (12) and extends to the interior of the connecting flange (20).

3. A mechanical seal suitable for a narrow stuffing box according to claim 1, characterized in that: The set screws (14) penetrate the connecting flange (20) and extend into the interior of the shaft sleeve (1). The set screws (14) are provided in equal numbers, and the plurality of set screws (14) are distributed in a ring shape.

4. A mechanical seal suitable for a narrow stuffing box according to claim 1, characterized in that: The stationary ring seat (22) is located at the bottom of the connecting flange (20), and the flushing cooling hole (23) is in a "circular" structure.

5. A mechanical seal suitable for a narrow stuffing box according to claim 1, characterized in that: The fixing ring 1 (2), the fixing ring 2 (3), the fixing ring 3 (6) and the fixing ring 4 (8) are in a "circular" structure, and the fixing ring 1 (2), the fixing ring 2 (3), the fixing ring 3 (6) and the fixing ring 4 (8) are made of hexafluoropropylene copolymer rubber material.

6. A mechanical seal suitable for a narrow stuffing box according to claim 1, characterized in that: The auxiliary dynamic ring (18) and the anti-rotation pin (19) are matched, and the positioning ring three (21) is located between the connecting flange (20) and the stationary ring seat (22).

7. A mechanical seal suitable for a narrow stuffing box according to claim 1, characterized in that: The second positioning ring (17) is located between the driving ring (16) and the auxiliary moving ring (18), and the stationary ring seat (22) is made of 304 stainless steel.

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