Double-end-face mechanical sealing structure

Abstract

The utility model relates to a double-end-face mechanical sealing structure which comprises a gland structure, a system assembly, an end face cover and a fastening screw, a bearing can conveniently penetrate through the gland structure through an arranged adaptive structure, space is provided for movement of a buckle block, a connecting rod and a spring, and when the front end of the buckle block is pushed by a bearing seat, the front end of the buckle block is locked. The connecting rod can be driven to move back and forth under the elastic cooperation of the spring, then the position of the buckle block is adjusted, the buckle block can adapt to different bearing pedestal diameter widths conveniently, the position fixing effect on the bearing pedestal is achieved, the connecting rod penetrates through the guide seat and the follow-up seat and can be clamped on the anti-deviation plate in a sliding mode through the anti-deviation block, and therefore the bearing pedestal can rotate along with the buckle block, and the bearing pedestal can rotate along with the buckle block. And the bearing penetrating through the bearing seat can conveniently rotate in the column cavity.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical seals, in particular to a double-end surface mechanical seal structure. Background Art

[0002] Double-end mechanical seals have higher reliability, lower risk of leakage, and can better protect the safety of equipment and working environment. In addition, due to the more complex structure of double-end mechanical seals, it requires higher manufacturing costs and more sophisticated installation and maintenance. However, since double-end mechanical seals provide better performance, they are often widely used in industrial fields with higher leakage requirements, such as chemical, petroleum and pharmaceutical.

[0003] When optimizing the existing double-face mechanical seal structure, most of the focus is on how to make the sealing structure more convenient to assemble, compact in structure, and reduce the size occupied by the mechanical seal. For example, the Chinese utility model patent with application number CN202021789141.3 discloses "A double-face mechanical seal structure". In this device, the sealing seat is sleeved on the transmission shaft, and the two end surfaces of the sealing seat are respectively provided with a first mounting cavity and a second mounting cavity, the first static ring and the second static ring are respectively arranged in the first mounting cavity and the second mounting cavity, the first moving ring is sleeved on the transmission shaft and connected to the first static ring, the second moving ring is sleeved on the transmission shaft and connected to the second static ring, one end of the transmission pin is passed through the transmission shaft and the other end is passed through the first moving ring, the clamping plate is fixed on the transmission shaft and presses the second moving ring. The double-face mechanical seal is very convenient to assemble and has a compact structure, thereby reducing the size occupied by the mechanical seal.

[0004] Although the above-mentioned double-end mechanical seal structure has certain advantages in improving its assembly convenience, it still has certain disadvantages: for the device to operate, the transmission shaft bearing needs to pass through the inside and outside of the device, and the column cavity provides a rotation space for the bearing. However, the column cavity has a fixed diameter, and cannot provide a good rotational directional force for the bearings of different diameters, resulting in poor adaptability of the device. Utility Model Content

[0005] 1. Technical issues to be resolved

[0006] In order to solve the above technical problems, the utility model provides a double-end surface mechanical seal structure.

[0007] (II) Technical solution

[0008] Based on this, the utility model provides the following technical solutions: a double-end mechanical seal structure, including a gland structure, a system component, an end face cover and a captive screw, wherein the captive screw bolt is installed on the outer end face of the gland structure, the gland structure is installed on the front end face of the system component through the captive screw, and the end face cover is installed at the other end face position of the system component; the gland structure includes a disc face cover, a shaft through-hole, a stationary ring and a dynamic ring, the shaft through-hole and the disc face cover are an integrated structure and are through-set at the middle position thereof, the stationary ring is connected to the inner side of the disc face cover, and the dynamic ring is adjacent to the stationary ring and movably matched.

[0009] Preferably, the system component includes an outer protective block, a column cavity and an adapter structure, the column cavity passes through the interior of the outer protective block and is set through, the adapter structure is embedded in the interior of the outer protective block, and the adapter structure ring is located on the outer side of the column cavity.

[0010] Preferably, the adaptation structure includes a ring frame block, an anti-deviation plate, a snap block, a connecting rod, a follower seat, a spring, an anti-deviation block and a guide seat, the anti-deviation plate is embedded and connected to the inner wall surface of the ring frame block, the rear end of the snap block is embedded and connected to the front end of the connecting rod, the spring is wrapped and connected to the outer side of the connecting rod and movably cooperates, the connecting rod passes through the interior of the follower seat, the anti-deviation block is embedded and connected to the outer end of the follower seat, the guide seat is fixedly connected to the outer side of the follower seat, and the anti-deviation block is embedded and pressed into the interior of the anti-deviation plate and slidably engaged.

[0011] Preferably, the disc cover is mounted on the front end surface of the system component by means of captive screws.

[0012] Preferably, the front and rear end faces of the outer protective block are respectively installed with the pressure cover structure and the end cover bolts, and the column cavity is connected with the shaft through-hole, and the column cavity provides a movable space for the bearing penetrating into the system component.

[0013] Preferably, the adapting structure is arranged adjacent to the moving ring, and the adapting structure is an annular structure with an annular groove cavity inside.

[0014] Preferably, the outer side of the ring frame block is embedded and connected to the inside of the outer protective block, the snap block moves on the inner side of the column cavity, the connecting rod passes through the outer side of the column cavity, the snap block, the connecting rod and the follower seat are a group for coordinated movement, two groups are provided and are symmetrically arranged, the middle part of the anti-deviation plate is in a hollow opening state, and the anti-deviation block slides and moves in a circular shape along the anti-deviation plate, so that the auxiliary snap block can be clamped and installed on the bearing seat and rotate with the bearing.

[0015] (III) Beneficial effects

[0016] Compared with the prior art, the utility model provides a double-end mechanical seal structure with the following features:

[0017] Beneficial effects:

[0018] 1. This double-end mechanical seal structure is convenient for bearing insertion through the provided adaptation structure, and provides space for the activities of the snap block, the connecting rod and the spring. When the front end of the snap block is subjected to the pushing pressure of the bearing seat, the connecting rod can be driven to move forward and backward under the elastic cooperation of the spring, thereby adjusting the position of the snap block to facilitate its adaptation to different bearing seat diameters and widths, and has a retaining effect on the bearing seat. The connecting rod passes through the guide seat, and the follower seat can be slidably engaged with the anti-deviation plate through the anti-deviation block, so that the bearing seat can rotate with the snap block, which is convenient for the bearing that passes through the bearing seat to rotate in the column cavity.

[0019] 2. This double-end mechanical seal structure has a gland structure and an end cover installed on both sides of the system component, and the bearings pass through the gland structure, the system component and the end cover one by one. The two ends of the bearing are connected to the external pump respectively. When the operation starts, the static ring does not rotate along the axis, and the dynamic ring moves axially under the thrust of the spring. The end faces of the dynamic ring and the static ring form an oil film under high-speed rotation to achieve a sealing effect and prevent leakage of the inlet and outlet media. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0021] Figure 2 It is a three-dimensional structural schematic diagram of the gland structure of the utility model;

[0022] Figure 3 It is a three-dimensional structural diagram of the system components of the utility model;

[0023] Figure 4 It is a schematic diagram of the cross-sectional structure of the outer protective block of the utility model;

[0024] Figure 5 It is a schematic diagram of the cross-sectional structure of the adaptation structure of the utility model.

[0025] In the figure: gland structure-1, system component-2, end cover-3, locking screw-4, disc cover-11, shaft opening-12, static ring-13, dynamic ring-14, outer protective block-21, column cavity-22, adapter structure-23, ring frame block-231, anti-deviation plate-232, snap block-233, connecting rod-234, follower seat-235, spring-236, anti-deviation block-237, guide seat-238. DETAILED DESCRIPTION

[0026] 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.

[0027] See also Figure 1-2 A double-end mechanical seal structure comprises a gland structure 1, a system component 2, an end face cover 3 and a locking screw 4, wherein the locking screw 4 is bolted on the outer end face of the gland structure 1, the gland structure 1 is mounted on the front end face of the system component 2 through the locking screw 4, and the end face cover 3 is mounted on the other end face of the system component 2; the gland structure 1 comprises a disc face cover 11, a shaft through-hole 12, a stationary ring 13 and a dynamic ring 14, the shaft through-hole 12 and the disc face cover 11 are an integrated structure and are through-set at the middle position thereof, the stationary ring 13 is connected to the inner side of the disc face cover 11, the dynamic ring 14 is adjacently arranged to the stationary ring 13 and movably matched, and the disc face cover 11 is mounted on the front end face of the system component 2 through the locking screw 4.

[0028] See also Figure 3-4 A double-end mechanical seal structure, the system component 2 includes an outer protective block 21, a column cavity 22 and an adapter structure 23, the column cavity 22 passes through the interior of the outer protective block 21 and is set through, the adapter structure 23 is embedded in the interior of the outer protective block 21, the adapter structure 23 is located on the outer side of the column cavity 22, the front and rear end faces of the outer protective block 21 are bolted to the pressure cover structure 1 and the end cover 3 respectively, the column cavity 22 is connected with the shaft through-hole 12, the column cavity 22 provides a movable space for the bearing that passes through the system component 2, the adapter structure 23 is adjacent to the moving ring 14, the adapter structure 23 is an annular structure, and the interior is an annular groove cavity state.

[0029] See also Figure 5A double-end mechanical seal structure, the adapting structure 23 includes a ring frame block 231, an anti-deviation plate 232, a buckle block 233, a connecting rod 234, a follower seat 235, a spring 236, an anti-deviation block 237 and a guide seat 238, the anti-deviation plate 232 is embedded and connected to the inner wall surface of the ring frame block 231, the rear end of the buckle block 233 is embedded and connected to the front end of the connecting rod 234, the spring 236 is wound and connected to the outer side of the connecting rod 234 and movably cooperates, the connecting rod 234 passes through the interior of the follower seat 235, the anti-deviation block 237 is embedded and connected to the outer end of the follower seat 235, and the guide seat 238 is fixedly connected On the outside of the follower seat 235, the anti-deviation block 237 is embedded in the inside of the anti-deviation plate 232 and slidably engaged. The outside of the ring frame block 231 is embedded and connected to the inside of the outer protective block 21. The snap block 233 moves on the inner side of the column cavity 22. The connecting rod 234 passes through the outside of the column cavity 22. The snap block 233, the connecting rod 234, and the follower seat 235 are a group for coordinated movement. There are two groups and they are symmetrically arranged. The middle part of the anti-deviation plate 232 is in an empty opening state. The anti-deviation block 237 slides and moves in a ring shape along the anti-deviation plate 232, so that the auxiliary snap block 233 can be clamped and installed on the bearing seat and then rotates with the bearing.

[0030] In summary, the disc cover 11 is first removed from the double ends of the outer protective block 21 by the locking screws 4, and the bearing seat required for the operation of the auxiliary bearing is placed in the column cavity 22. Through the provided adaptation structure 23, it itself is an annular structure, and the interior is an annular groove cavity state, and the end faces on both sides of the middle are open structures, which are convenient for the insertion of the bearing and provide space for the activities of the snap block 233, the connecting rod 234 and the spring 236. When the front end of the snap block 233 is pushed by the bearing seat, the connecting rod 234 can be driven to move forward and backward under the elastic cooperation of the spring 236, thereby adjusting the position of the snap block 233 to facilitate it to adapt to different bearing seat diameters and widths. After adjustment, it forms a snap position with the outer snap seam of the bearing seat, which has a fixing effect on the bearing seat. The connecting rod 234 passes through the guide seat 238, and the guide seat 238 is fixedly connected to the follower seat 235. The follower seat 235 can be slidably engaged on the anti-deviation plate 232 through the anti-deviation block 237, so that the bearing seat can rotate with the snap block 233, so that the bearing that passes through the bearing seat can rotate in the column cavity 22, and then the pressure cover structure 1 and the end cover 3 are installed, and the bearings pass through the pressure cover structure 1, the system component 2 and the end cover 3 one by one, and the two ends of the bearing are respectively connected to the external pump. When the operation starts, the static ring 13 does not rotate along the axis, and the dynamic ring 14 moves axially under the thrust of the spring. The end faces of the dynamic ring 14 and the static ring 13 form an oil film under high-speed rotation to achieve a sealing effect and prevent leakage of the inlet and outlet media.

[0031] The control method of the present invention is to control by manually starting and closing the switch. The wiring diagram of the power element and the provision of power supply are common knowledge in the field, and the present invention is mainly used to protect mechanical devices, so the present invention will not explain the control method and wiring arrangement in detail.

[0032] The control method of the present invention is automatic control through a controller. The control circuit of the controller can be realized by simple programming by technicians in this field. The provision of power is also common knowledge in this field. The present invention is mainly used to protect mechanical devices, so the present invention will no longer explain the control method and circuit connection in detail.

[0033] 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 double-end mechanical seal structure, characterized in that: It comprises a gland structure (1), a system component (2), an end face cover (3) and a locking screw (4), wherein the locking screw (4) is bolted on the outer end face of the gland structure (1), the gland structure (1) is mounted on the front end face of the system component (2) through the locking screw (4), and the end face cover (3) is mounted on the other end face of the system component (2); The gland structure (1) comprises a disc cover (11), an axial opening (12), a stationary ring (13) and a dynamic ring (14); the axial opening (12) and the disc cover (11) are an integrated structure and are arranged through-through at the middle position thereof; the stationary ring (13) is connected to the inner side of the disc cover (11); and the dynamic ring (14) and the stationary ring (13) are arranged adjacent to each other and are movably matched.

2. A double-end mechanical seal structure according to claim 1, characterized in that: The system component (2) comprises an outer protective block (21), a column cavity (22) and an adapting structure (23); the column cavity (22) passes through the interior of the outer protective block (21) and is arranged through-through; the adapting structure (23) is embedded in the interior of the outer protective block (21); and the adapting structure (23) is located on the outer side of the column cavity (22) in an annular sleeve.

3. A double-end mechanical seal structure according to claim 2, characterized in that: The adapting structure (23) comprises a ring frame block (231), an anti-deviation plate (232), a buckle block (233), a connecting rod (234), a follower seat (235), a spring (236), an anti-deviation block (237) and a guide seat (238); the anti-deviation plate (232) is embedded and connected to the inner wall surface of the ring frame block (231); the rear end of the buckle block (233) is embedded and connected to the front end of the connecting rod (234); the spring (236) is wound and connected to the outer side of the connecting rod (234) and movably cooperates; the connecting rod (234) passes through the interior of the follower seat (235); the anti-deviation block (237) is embedded and connected to the outer end of the follower seat (235); the guide seat (238) is fixedly connected to the outer side of the follower seat (235); the anti-deviation block (237) is embedded and pressed into the interior of the anti-deviation plate (232) and slidably engaged.

4. A double-end mechanical seal structure according to claim 1, characterized in that: The disc surface cover (11) is mounted on the front end surface of the system component (2) via locking screws (4).

5. A double-end mechanical seal structure according to claim 2, characterized in that: The front and rear end faces of the outer protective block (21) are respectively bolted to the gland structure (1) and the end face cover (3); the column cavity (22) is connected to the shaft opening (12); and the column cavity (22) provides a movable space for the bearing that penetrates into the system component (2).

6. A double-end mechanical seal structure according to claim 2, characterized in that: The adapting structure (23) is arranged adjacent to the moving ring (14).

7. A double-end mechanical seal structure according to claim 3, characterized in that: The outer side of the ring frame block (231) is embedded and connected to the inside of the outer protection block (21), the buckle block (233) moves on the inner side of the column cavity (22), and the connecting rod (234) passes through the outer side of the column cavity (22).

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