CN221569417U

CN221569417U - Anti-collision mechanical sealing structure

Info

Publication number: CN221569417U
Application number: CN202420228861.4U
Authority: CN
Inventors: 林祥春; 苏京鹏; 丁敏
Original assignee: Zhejiang Weizhen Sealing Technology Co ltd
Current assignee: Zhejiang Weizhen Sealing Technology Co ltd
Priority date: 2024-01-30
Filing date: 2024-01-30
Publication date: 2024-08-20
Anticipated expiration: 2034-01-30

Abstract

The utility model provides an anti-collision mechanical sealing structure, which belongs to the technical field of mechanical sealing and is used for being assembled with a rotating shaft, and comprises an organic sealing seat, a stationary ring arranged on the organic sealing seat and a moving ring assembly arranged in a rotating way relative to the stationary ring, wherein the moving ring assembly and the rotating shaft synchronously rotate; when the spring seat is impacted, the spring can reduce impact force directly transmitted to the movable ring, stable and reliable sealing fit is formed between the movable ring and the static ring, and meanwhile, the spring can provide certain sealing compensation after the sealing surfaces of the movable ring and the static ring are worn.

Description

Anti-collision mechanical sealing structure

Technical Field

The utility model relates to the technical field of mechanical sealing, in particular to an anti-collision mechanical sealing structure.

Background

A mechanical seal is a sealing device for pumps and rotating equipment, the main function of which is to prevent leakage of fluid along the axis of rotation. It is more effective than a packing seal and is therefore very common in applications where tight control of leakage is required. The mechanical seal works on the principle that two sealing surfaces (a movable ring and a static ring) are tightly contacted under the action of spring force, one sealing surface is fixed, the other sealing surface rotates along with a shaft, and fluid leakage is prevented by friction.

The inventor of the present application discloses a bidirectional pressure-bearing static ring compensation double-end-face mechanical sealing device, wherein the anti-collision capability of a movable ring in the mechanical sealing device is weak, and the sealing performance is easy to be reduced when the movable ring is impacted by external force, in the prior application number 202322059797X.

Disclosure of utility model

The utility model aims to overcome the defects and the shortcomings of the prior art and provide an anti-collision mechanical sealing structure.

The technical scheme adopted by the utility model is as follows: an anticollision mechanical seal structure for with pivot assembly, including organic seal seat, the quiet ring of setting on the quick-witted seal seat and the rotating ring subassembly of relative quiet ring rotation setting, the rotating ring subassembly rotates in step with the pivot, the rotating ring subassembly is including the rotating ring seat, install moving ring and the spring holder at moving ring seat inner periphery, moving ring and quiet ring looks butt form sealedly, the spring holder is provided with the mounting hole along the axial direction of pivot, be provided with the spring in the mounting hole, the spring butt is between mounting hole and moving ring seat, the one end that the spring holder is close to the moving ring seat has the removal space along the axial direction of pivot.

The movable ring assembly further comprises a shaft sleeve, the shaft sleeve is sleeved outside the rotating shaft, the inner periphery of the shaft sleeve is in sealing fit with the rotating shaft, and the outer periphery of the shaft sleeve is in sealing fit with the movable ring assembly.

The automatic sealing device is characterized by further comprising a spacer bush, wherein one end of the shaft sleeve, which is close to the stationary ring, is provided with a moving space along the axial direction of the rotating shaft, the lower end of the spacer bush is connected with the machine sealing seat in a sealing way, the upper end of the spacer bush is close to the shaft sleeve, a cavity is formed among the machine sealing seat, the spacer bush, the shaft sleeve, the moving ring and the stationary ring, and a flushing outlet and a flushing inlet which are communicated with the cavity are arranged on the machine sealing seat.

Still including quiet ring gland, be provided with quiet ring mounting groove on the quick-witted seal seat, the periphery circumference of quiet ring is provided with bulge loop portion, bulge loop portion supports and presses between quiet ring mounting groove and quiet ring gland to all be provided with the sealing washer between up end and the quiet ring gland of bulge loop portion and between the lower terminal surface of bulge loop portion and the diapire of quiet ring mounting groove.

The periphery of the stationary ring gland extends towards the spring seat to form an annular plate, the upper end of the annular plate is provided with a liquid box cover, the liquid box cover is provided with an opening for the movable ring assembly to pass through, and the annular plate is not lower than the lowest end face of the spring seat.

The spring seat is provided with a locking hole along the radial direction of the rotating shaft, a locking bolt is arranged in the locking hole, the spring seat and the rotating shaft synchronously rotate through the locking bolt, the spring seat is provided with a linkage pin along the axial direction of the rotating shaft, a linkage hole for the linkage pin to be inserted is formed between the movable ring seat and the movable ring, and the movable ring seat, the movable ring and the rotating shaft synchronously rotate through the linkage pin.

And a gap is reserved between the tail end of the linkage pin and the bottom of the linkage hole.

The lower part of the machine seal seat is provided with a cooling cavity along the circumference of the rotating shaft, the cooling cavity is isolated from the rotating shaft, and the machine seal seat is provided with a cooling outlet communicated with the cooling cavity and a flushing cooling inlet.

The movable ring seat is made of metal materials, and a movable ring mounting groove for embedding a movable ring is formed in the movable ring seat.

The mounting hole is provided with an adjusting hole penetrating through the spring seat along the axial direction of the rotating shaft.

The beneficial effects of the utility model are as follows: when the spring seat is impacted, the spring can reduce impact force directly transmitted to the movable ring, stable and reliable sealing fit is formed between the movable ring and the static ring, and meanwhile, the spring can provide certain sealing compensation after the sealing surfaces of the movable ring and the static ring are worn.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions of the prior art, the drawings which are required in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the utility model, and that it is within the scope of the utility model to one skilled in the art to obtain other drawings from these drawings without inventive faculty.

FIG. 1 is a schematic illustration of the present utility model;

FIG. 2 is an enlarged view of FIG. 1 at A;

FIG. 3 is an enlarged view at B in FIG. 1;

Fig. 4 is an enlarged view at C in fig. 1.

Detailed Description

The utility model will now be described in further detail with reference to the accompanying drawings. The drawings are simplified schematic representations which merely illustrate the basic structure of the utility model and therefore show only the structures which are relevant to the utility model.

In the description of the present application, it should be understood that the terms "longitudinal," "radial," "length," "width," "thickness," "upper," "lower," "left," "right," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application. In the description of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art.

In the description of the present utility model, it should be noted that, in the embodiments of the present utility model, all the expressions "first" and "second" are used for distinguishing two entities with the same name and non-same parameters, and it is noted that the "first" and "second" are merely for convenience of description, and should not be construed as limiting the embodiments of the present utility model, and the following embodiments are not described in any way.

Embodiment one:

As shown in fig. 1 to 4, an anti-collision mechanical seal structure is used for being assembled with a rotating shaft 1, and comprises an organic seal seat 2, a static ring 3 arranged on the organic seal seat 2 and a moving ring assembly 4 which is rotatably arranged relative to the static ring 3, wherein the moving ring assembly 4 and the rotating shaft 1 synchronously rotate, the moving ring assembly 4 comprises a moving ring seat 41, a moving ring 42 and a spring seat 44 which are arranged on the inner periphery of the moving ring seat 41, the moving ring 42 and the static ring 3 are abutted to form a seal, the spring seat 44 is provided with a plurality of mounting holes 441 along the axial direction of the rotating shaft 1, the mounting holes 441 can be circumferentially provided with a plurality of springs 45, one end, close to the moving ring seat 41, of the spring seat 44 has a moving space along the axial direction of the rotating shaft 1, namely, under the action of the springs 45, a gap is reserved between the lower end face of the spring seat 44 and the upper end face of the moving ring seat 41, so that when the spring seat 44 is impacted, the springs 45 can reduce the impact force directly transferred to the moving ring 42, the springs 45 can ensure that the static ring 3 and the static ring 3 can be stably matched with the sealing surface 42 and can reliably compensate for abrasion after the static ring 3 is formed.

The movable ring assembly 4 further comprises a shaft sleeve 43, the shaft sleeve 43 is sleeved outside the rotating shaft 1, the inner periphery of the shaft sleeve 43 is in sealing fit with the rotating shaft 1, the outer periphery of the shaft sleeve is in sealing fit with the movable ring assembly 4, the sealing performance of the whole structure is improved through double sealing, external pollutants are effectively isolated, and the direct friction between the movable ring 42 and the rotating shaft can be reduced through the sealing fit between the shaft sleeve 43 and the rotating shaft 1, so that abrasion is reduced, and the service life of a sealing element is prolonged.

The anti-collision device is characterized by further comprising a spacer 7, wherein one end of the shaft sleeve 43, which is close to the stationary ring 3, is provided with a moving space along the axial direction of the rotating shaft 1, namely, a gap is arranged between the lower end face of the shaft sleeve 43 and the movable ring 42, the lower end of the spacer 7 is connected with the machine seal seat 2 in a sealing way, the upper ends of the spacer 7 are close to the shaft sleeve 43, the two of the spacer 7 are provided with smaller gaps, a cavity 8 is formed among the machine seal seat 2, the spacer 7, the shaft sleeve 43, the movable ring 42 and the stationary ring 3, a flushing outlet FO and a flushing inlet FI which are communicated with the cavity 8 are arranged on the machine seal seat 2, flushing fluid or buffer fluid can be introduced into the cavity 8, the flushing fluid can flush abrasion matters generated between the movable ring 42 and the stationary ring 3, and the buffer fluid can provide floating support for the shaft sleeve 43, and further improve the anti-collision capacity of the spring seat 44. Secondly, the spacer 7 can avoid the damage of 7 flushing fluid or buffer fluid to the rotating shaft.

Still including quiet ring gland 5, be provided with quiet ring mounting groove 21 on the quick-witted seal seat 2, the periphery circumference of quiet ring 3 is provided with bulge loop portion 31, bulge loop portion 31 supports and presses between quiet ring mounting groove 21 and quiet ring gland 5 to all be provided with sealing washer 6 between bulge loop portion 31's the up end and quiet ring gland 5 and between bulge loop portion 31's lower terminal surface and quiet ring mounting groove 21's diapire, provided dual leak protection, this structure makes quiet ring 3 anti deformation ability reinforcing simultaneously, can prevent that medium pressure from too high leading to quiet ring 3 to shift up.

The periphery of the stationary ring gland 5 extends towards the spring seat 44 to form an annular plate 51, a liquid box cover 52 is arranged at the upper end of the annular plate 51, an opening 53 for the moving ring assembly 4 to pass through is formed in the liquid box cover 52, the annular plate 51 is not lower than the lowest end face of the spring seat 44, the annular plate 51 and the liquid box cover 52 form a protective cover, the spring seat 44 is exposed to bear impact force, and the situation that the moving ring, the stationary ring and other fragile structures directly bear impact force is avoided.

The spring seat 44 is provided with a locking hole 442 along the radial direction of the rotating shaft 1, a locking bolt 443 is arranged in the locking hole 442, the spring seat 44 and the rotating shaft 1 synchronously rotate through the locking bolt 443, for example, the tail end of the locking bolt 443 is propped against the rotating shaft, the spring seat 44 is provided with a linkage pin 444 along the axial direction of the rotating shaft 1, a linkage hole 445 for inserting the linkage pin 444 is arranged between the movable ring seat 41 and the movable ring 42, the movable ring seat 41 and the movable ring 42 synchronously rotate through the linkage pin 444, an interference fit is adopted between the movable ring seat 41 and the movable ring 42, and the linkage pin 444 on the spring seat enables the movable ring seat 41 and the movable ring 42 to simultaneously rotate, so that the movable ring and the movable ring assembly 4 form a stable and reliable circumferential linkage fit.

The end of the linkage pin 444 is spaced from the bottom of the linkage hole 445 to ensure that the spring seat 44 has a moving space in the axial direction of the rotating shaft.

A sealing ring is arranged between the radial abutting end surfaces of the static ring gland 5 and the machine seal seat 2, and in the embodiment, an O-shaped sealing ring is adopted as the sealing ring.

The lower part of the machine seal seat 2 is provided with a cooling cavity 22 along the circumferential direction of the rotating shaft 1, the cooling cavity 22 is isolated from the rotating shaft 1, the machine seal seat 2 is provided with a cooling outlet CO communicated with the cooling cavity 22 and a flushing cooling inlet CI, when the movable ring 42 rubs with the static ring 3 to cause fluid temperature rise, the cooling circulation structure can effectively cool the fluid in the cavity.

The movable ring seat 41 is made of metal, the movable ring seat 41 is provided with a movable ring mounting groove 411 for embedding the movable ring 42, and the movable ring seat 41 made of metal can provide higher structural strength and rigidity.

The mounting hole 441 is provided with an adjusting hole 446 penetrating the spring seat 44 along the axial direction of the rotating shaft 1, the adjusting hole 446 is a threaded hole, and the pretightening force of the spring 45 can be adjusted through a bolt, so that effective sealing between the moving ring 42 and the stationary ring 3 is ensured.

The foregoing disclosure is illustrative of the present utility model and is not to be construed as limiting the scope of the utility model, which is defined by the appended claims.

Claims

1. An anti-collision mechanical sealing structure is used for being assembled with a rotating shaft (1), and comprises an organic sealing seat (2), a stationary ring (3) arranged on the organic sealing seat (2) and a movable ring assembly (4) which is arranged in a rotating mode relative to the stationary ring (3), wherein the movable ring assembly (4) rotates synchronously with the rotating shaft (1), and is characterized in that the movable ring assembly (4) comprises a movable ring seat (41), a movable ring (42) arranged on the inner periphery of the movable ring seat (41) and a spring seat (44), the movable ring (42) and the stationary ring (3) are in butt joint to form a seal, the spring seat (44) is provided with a mounting hole (441) along the axial direction of the rotating shaft (1), a spring (45) is arranged in the mounting hole (441), the spring (45) is in butt joint between the mounting hole (441) and the movable ring seat (41), and one end, close to the movable ring seat (41), of the spring seat (44) has a moving space along the axial direction of the rotating shaft (1).

2. An anti-collision mechanical seal structure according to claim 1, wherein the movable ring assembly (4) further comprises a shaft sleeve (43), the shaft sleeve (43) is sleeved outside the rotating shaft (1), the inner periphery of the shaft sleeve is in sealing fit with the rotating shaft (1), and the outer periphery of the shaft sleeve is in sealing fit with the movable ring assembly (4).

3. The anti-collision mechanical seal structure according to claim 2, further comprising a spacer bush (7), wherein one end of the shaft sleeve (43) close to the stationary ring (3) is provided with a moving space along the axial direction of the rotating shaft (1), the lower end of the spacer bush (7) is connected with the machine seal seat (2) in a sealing manner, the upper end of the spacer bush is close to the shaft sleeve (43), a cavity (8) is formed among the machine seal seat (2), the spacer bush (7), the shaft sleeve (43), the movable ring (42) and the stationary ring (3), and a flushing outlet and a flushing inlet which are communicated with the cavity (8) are arranged on the machine seal seat (2).

4. The anti-collision mechanical seal structure according to claim 1, further comprising a stationary ring gland (5), wherein a stationary ring installation groove (21) is formed in the machine seal seat (2), a convex ring portion (31) is circumferentially arranged on the periphery of the stationary ring (3), the convex ring portion (31) is abutted against between the stationary ring installation groove (21) and the stationary ring gland (5), and sealing rings (6) are respectively arranged between the upper end face of the convex ring portion (31) and the stationary ring gland (5) and between the lower end face of the convex ring portion (31) and the bottom wall of the stationary ring installation groove (21).

5. An anti-collision mechanical seal structure according to claim 4, characterized in that the outer periphery of the stationary ring gland (5) extends towards the spring seat (44) to form an annular plate (51), the upper end of the annular plate (51) is provided with a liquid box cover (52), the liquid box cover (52) is provided with an opening (53) for the passage of the movable ring assembly (4), and the annular plate (51) is not lower than the lowest end face of the spring seat (44).

6. The anti-collision mechanical seal structure according to claim 1, wherein the spring seat (44) is provided with a locking hole (442) along the radial direction of the rotating shaft (1), a locking bolt (443) is arranged in the locking hole (442), the spring seat (44) and the rotating shaft (1) synchronously rotate through the locking bolt (443), the spring seat (44) is provided with a linkage pin (444) along the axial direction of the rotating shaft (1), a linkage hole (445) for inserting the linkage pin (444) is arranged between the moving ring seat (41) and the moving ring (42), and the moving ring seat (41) and the moving ring (42) and the rotating shaft (1) synchronously rotate through the linkage pin (444).

7. The crash-proof mechanical seal structure as recited in claim 6, wherein the distal end of said interlock pin (444) is spaced from the bottom of said interlock hole (445).

8. An anti-collision mechanical seal structure according to claim 1, wherein a cooling cavity (22) is arranged at the lower part of the mechanical seal seat (2) along the circumference of the rotating shaft (1), the cooling cavity (22) is isolated from the rotating shaft (1), and a cooling outlet and a flushing cooling inlet which are communicated with the cooling cavity (22) are arranged on the mechanical seal seat (2).

9. The anti-collision mechanical seal structure according to claim 1, wherein the moving ring seat (41) is made of metal, and a moving ring mounting groove (411) into which the moving ring (42) is inserted is provided on the moving ring seat (41).

10. An anti-collision mechanical seal according to claim 1, characterized in that the mounting hole (441) is provided with an adjustment hole (446) penetrating the spring seat (44) in the axial direction of the rotating shaft (1).