CN216242294U

CN216242294U - Multifunctional double-end-face mechanical seal for reaction kettle

Info

Publication number: CN216242294U
Application number: CN202122910172.0U
Authority: CN
Inventors: 姚周仟
Original assignee: Zhejiang Jiemi Sealing Technology Co ltd
Current assignee: Zhejiang Jiemi Sealing Technology Co ltd
Priority date: 2021-11-25
Filing date: 2021-11-25
Publication date: 2022-04-08
Anticipated expiration: 2031-11-25

Abstract

The utility model relates to the technical field of mechanical sealing, in particular to a multifunctional double-end-face mechanical seal for a reaction kettle, which comprises a shaft sleeve, a moving ring, a static ring and a seal box body, wherein the seal box body is fixedly sleeved with a first static ring seat and a second static ring seat, one ends, opposite to the first static ring seat and the second static ring seat, of the static rings are respectively abutted against the static rings, the moving ring is provided with a longitudinal through hole, the moving ring is positioned in the longitudinal through hole and is internally provided with a longitudinal spring, two ends of the longitudinal spring are abutted against by static ring pressing plates, the static ring pressing plates are abutted against by the static rings, the bottom end of the seal box body is fixedly provided with a flushing return pipe, the bottom end of the shaft sleeve is provided with an annular groove, and the top end of the flushing return pipe extends into the annular groove and is encircled with the shaft sleeve to form a flushing passage with a reversed V-shaped longitudinal section. The utility model can allow the stirring shaft to axially move when rotating, improves the stirring uniformity of the stirring shaft, adopts the sleeve-joint sliding fit of the movable ring and the static ring, has compact fit, small axial displacement and reliable seal, and is suitable for aseptic places such as biological pharmacy and chemical engineering workshops.

Description

Multifunctional double-end-face mechanical seal for reaction kettle

Technical Field

The utility model relates to the technical field of mechanical seal, in particular to a multifunctional double-end-face mechanical seal for a reaction kettle.

Background

The sealing surface of the mechanical seal can play a sealing role only by a certain specific pressure, so that a spring of the mechanical seal needs a certain compression amount to provide a thrust force for the sealing end surface, and the spring rotates to enable the sealing surface to generate the specific pressure required by sealing. To ensure this specific pressure, the mechanical seal requires that the shaft must not have too much play, typically within 0.5 mm. The existing mechanical sealing device can only realize sealing on a stirring shaft which horizontally rotates around a fixed rotating shaft, but cannot realize sealing on the stirring shaft which reciprocates up and down.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a multifunctional double-end-face mechanical seal for a reaction kettle, which aims to solve the problems in the background technology.

In order to achieve the purpose, the utility model provides the following technical scheme: a multifunctional double-end-face mechanical seal for a reaction kettle comprises a shaft sleeve rotationally connected with a stirring shaft, a movable ring fixedly connected with the outer wall of the shaft sleeve, two stationary rings distributed on the upper side and the lower side of the movable ring, and a seal box body sleeved on the peripheries of the movable ring and the stationary rings, wherein the bottom of the outer wall of the stirring shaft is fixedly connected with a first spline, the stirring shaft is positioned on the lower surface of the first spline and fixedly connected with a limit plate abutted against the shaft sleeve, the shaft sleeve is provided with a first spline groove matched with the first spline, the top of the outer wall of the stirring shaft is fixedly connected with a second spline, the shaft sleeve is provided with a second spline groove for accommodating the longitudinal movement of the second spline, the top of the shaft sleeve is fixedly connected with a baffle cover in sliding fit with the stirring shaft, the shaft sleeve is fixedly provided with a bearing rotationally connected with the seal box body, and the seal box body is fixedly sleeved with a first stationary ring seat and a second stationary ring seat distributed on the upper side and the lower side of the movable ring, the sealing device comprises a shaft sleeve, a sealing box body and a first static ring seat, wherein a first sealing cavity of a closed bearing is enclosed by the shaft sleeve, the sealing box body and the first static ring seat, a static ring is arranged at one end, opposite to the first static ring seat, of the first static ring seat and the second static ring seat in an abutting mode, a longitudinal through hole is formed in a movable ring, a longitudinal spring is arranged in the longitudinal through hole in a movable ring, a static ring pressing plate is arranged at two ends of the longitudinal spring in an abutting mode, one end, far away from the longitudinal spring, of the static ring pressing plate in an abutting mode is provided with the static ring, the static ring is in sliding connection with the movable ring, a flushing return pipe is fixedly installed at the bottom end of the sealing box body, a ring groove is formed in the bottom end of the shaft sleeve, the top end of the flushing return pipe stretches into the ring groove and is enclosed by the shaft sleeve with a flushing passage with a longitudinal section in a shape, and a flushing inlet and a flushing outlet which are communicated with the flushing passage are formed in the sealing box body.

Optionally, the sealing box body comprises a top end cover located at the top end of the bearing, a bearing cover which is fixedly connected with the bottom end of the top end cover and is in interference fit with an outer ring of the bearing, a first static ring cover which is fixedly connected with the bottom end of the bearing cover and is sleeved with a first static ring seat, a second static ring cover which is fixedly connected with a second static ring seat and a flushing return pipe, a movable ring cover which is fixedly arranged between the first static ring cover and the second static ring cover, and a corrugated pipe seat which is fixedly connected with the bottom end of the second static ring cover, wherein a bolt preformed hole is formed in the bottom of the corrugated pipe seat.

Optionally, the shaft sleeve, the sealing box body, the first stationary ring seat and the second stationary ring seat enclose a second sealing cavity which encloses the closed moving ring and the closed stationary ring, and the moving ring cover is provided with a cooling medium inlet and a cooling medium outlet which are communicated with the second sealing cavity.

Optionally, bearing oil seals are arranged between the top end cover and the bearing and between the first stationary ring seat and the bearing.

Optionally, the stirring shaft comprises a sealing ring, the sealing ring is arranged between the sealing box body and the first static ring seat, between the sealing box body and the second static ring seat, between the shaft sleeve and the static ring, and between the baffle cover and the stirring shaft, the sealing ring is arranged, and the sealing ring is an O-shaped sealing ring.

Compared with the prior art, the utility model has the following beneficial effects:

1. the utility model can allow the stirring shaft to axially move when rotating, improves the stirring uniformity of the stirring shaft, adopts the sleeve sliding fit of the movable ring and the static ring, has compact fit, small axial displacement and reliable seal, and is suitable for aseptic places such as biological pharmacy and chemical engineering workshops;

2. the corrugated pipe seat is arranged at the bottom of the sealing box body, can freely rotate in 360 degrees and extend for a certain length, meets the requirements of certain installation size and specific position degree required by the installation of the traditional sealing box body and the reaction kettle, and is simple to install and convenient to maintain.

Drawings

FIG. 1 is a schematic structural view of the present invention as a whole;

fig. 2 is an enlarged schematic view of a portion a in fig. 1.

In the figure: 1. a shaft sleeve; 2. sealing the box body; 201. a top end cap; 202. a bearing cap; 203. a first stationary ring cover; 204. a second stationary ring cover; 205. a movable ring cover; 206. a bellows seat; 207. flushing the inlet; 208. a flush outlet; 209. a media inlet; 210. a media outlet; 3. a bearing; 4. bearing oil seal; 5. a moving ring; 6. a stationary ring; 7. a first stationary ring seat; 8. a second stationary ring seat; 9. a longitudinal spring; 10. a stationary ring pressing plate; 11. flushing the return pipe; 12. a seal ring; 13. a stirring shaft; 14. a first spline; 15. a second spline; 16. a blocking cover; 17. and a limiting plate.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example (b): referring to fig. 1 and 2, the present invention provides a multifunctional double mechanical seal for a reaction kettle, which includes a shaft sleeve 1 rotatably connected to a stirring shaft 13, a rotating ring 5 fixedly connected to an outer wall of the shaft sleeve 1, two stationary rings 6 disposed at upper and lower sides of the rotating ring 5, and a seal box 2 sleeved on peripheries of the rotating ring 5 and the stationary rings 6.

The welding of the outer wall bottom of (mixing) shaft 13 has first spline 14, and the lower skin weld that (mixing) shaft 13 is located first spline 14 has the limiting plate 17 with the butt of axle sleeve 1, axle sleeve 1 has seted up the identical first spline groove with first spline 14, the welding of the outer wall top of (mixing) shaft 13 has second spline 15, axle sleeve 1 has seted up the second spline groove that holds second spline 15 longitudinal movement, and axle sleeve 1 is located the top of second spline 15 and passes through bolt fixedly connected with and (mixing) shaft 13 sliding fit's fender lid 16. The first spline 14 and the second spline 15 realize synchronous rotation transmission of the shaft sleeve 1 and the stirring shaft 13, and the shaft sleeve 1 can allow the stirring shaft 13 to move up and down as the length of the second spline 15 is smaller than that of the second spline, and the stirring shaft 13 can move up and down when rotating

Axle sleeve 1 has the bearing 3 of being connected with sealed box 2 rotation through jump ring fixed mounting, sealed box 2 is fixed to be cup jointed and to be distributed in first quiet ring seat 7 and the quiet ring seat 8 of second of 5 upper and lower both sides of rotating ring, axle sleeve 1, sealed box 2 encloses the first sealed chamber that has closed sealed bearing 3 with first quiet ring seat 7, the equal butt of one end that first quiet ring seat 7 and the quiet ring seat 8 of second are relative has quiet ring 6, vertical through-hole has been seted up to rotating ring 5, rotating ring 5 is located vertical through-hole and is equipped with vertical spring 9, the both ends butt of vertical spring 9 has quiet ring clamp plate 10, the one end butt that vertical spring 9 was kept away from to quiet ring clamp plate 10 has quiet ring 6. Referring to fig. 2, the movable ring 5 is provided with a groove for accommodating the stationary ring pressing plate 10 and the stationary ring 6, and the stationary ring 6 is slidably connected to the movable ring 5. The movable ring 5 and the static ring 6 are in sleeve sliding fit, the fit is compact, the axial displacement is small, and the sealing is reliable.

The seal box 2 includes a top end cover 201 located at the top end of the bearing 3, a bearing cover 202 fixedly connected with the bottom end of the top end cover 201 and in interference fit with the outer ring of the bearing 3, a first stationary ring cover 203 fixedly connected with the bottom end of the bearing cover 202 and sleeved with the first stationary ring seat 7, a second stationary ring cover 204 fixedly connected with the second stationary ring seat 8 and the flushing return pipe 11, a movable ring cover 205 fixedly arranged between the first stationary ring cover 203 and the second stationary ring cover 204, and a corrugated pipe seat 206 fixedly connected with the bottom end of the second stationary ring cover 204. The top end cover 201 is fixedly connected with the bearing cover 202, the first static ring cover 203 and the movable ring cover 205 in sequence through bolts, the movable ring cover 205 is fixedly connected with the second static ring cover 204 and the corrugated pipe seat 206 in sequence through bolts, bolt preformed holes are formed in the bottom of the corrugated pipe seat 206, the corrugated pipe seat 206 can be directly fixedly connected with the shell of the reaction kettle through bolts, the corrugated pipe seat 206 can freely rotate 360 degrees and extend for a certain length, the problem that the traditional sealing box body 2 and the reaction kettle need a certain installation size and a certain position degree is solved, the sealing box body 2 is simple to install and convenient to maintain.

The shaft sleeve 1, the sealing box body 2, the first stationary ring seat 7 and the second stationary ring seat 8 enclose a second sealing cavity for sealing the moving ring 5 and the stationary ring 6, and the moving ring cover 205 is provided with a cooling medium inlet 209 and a cooling medium outlet 210 which are communicated with the second sealing cavity. Bearing oil seals 4 are arranged between the top end cover 201 and the bearing 3 and between the first stationary ring seat 7 and the bearing 3. The utility model also comprises a sealing ring 12, wherein the sealing ring 12 is arranged between the sealing box body 2 and the first static ring seat 7, between the first static ring cover 203 and the first static ring seat 7, between the second static ring cover 204 and the second static ring seat 8, between the shaft sleeve 1 and the static ring 6, and between the baffle cover 16 and the stirring shaft 13, and the sealing ring 12 is an O-shaped sealing ring.

The bottom end of the sealing box body 2 is fixedly provided with a washing return pipe 11, the bottom end of the shaft sleeve 1 is provided with an annular groove, the top end of the washing return pipe extends into the annular groove and is enclosed with the shaft sleeve 1 to form a washing passage with a vertical section in a shape like a Chinese character 'ji', and the sealing box body 2 is provided with a washing inlet 207 and a washing outlet 208 which are communicated with the washing passage. The zigzag flushing passage delays the retention time of flushing liquid in the sealed box body 2 and improves the flushing effect.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a reation kettle is with multi-functional double mechanical seal, includes and rotates axle sleeve (1) of being connected with (mixing) shaft (13), with outer wall fixed connection's of axle sleeve (1) rotating ring (5), distributes in two quiet rings (6) of both sides about rotating ring (5) to and the sealed box (2) of rotating ring (5) and quiet ring (6) periphery are located to the cover, its characterized in that: the bottom of the outer wall of the stirring shaft (13) is fixedly connected with a first spline (14), the lower surface of the stirring shaft (13) positioned on the first spline (14) is fixedly connected with a limiting plate (17) abutted to the shaft sleeve (1), the shaft sleeve (1) is provided with a first spline groove matched with the first spline (14), the top of the outer wall of the stirring shaft (13) is fixedly connected with a second spline (15), the shaft sleeve (1) is provided with a second spline groove for accommodating the longitudinal movement of the second spline (15), the top of the shaft sleeve (1) positioned on the second spline (15) is fixedly connected with a retaining cover (16) in sliding fit with the stirring shaft (13), the shaft sleeve (1) is fixedly provided with a bearing (3) rotationally connected with the seal box body (2), and the seal box body (2) is fixedly sleeved with a first stationary ring seat (7) and a second stationary ring seat (8) which are distributed on the upper side and the lower side of the movable ring (5), the shaft sleeve (1), the sealing box body (2) and the first static ring seat (7) enclose a first sealing cavity for sealing the bearing (3), one end of the first static ring seat (7) opposite to the second static ring seat (8) is abutted with a static ring (6), the dynamic ring (5) is provided with a longitudinal through hole, the dynamic ring (5) is positioned in the longitudinal through hole and provided with a longitudinal spring (9), two ends of the longitudinal spring (9) are abutted with static ring pressing plates (10), one end of each static ring pressing plate (10) far away from the longitudinal spring (9) is abutted with the static ring (6), the static ring (6) is in sliding connection with the dynamic ring (5), the bottom end of the sealing box body (2) is fixedly provided with a flushing return pipe (11), the bottom end of the shaft sleeve (1) is provided with a ring groove, the top end of the flushing return pipe extends into the ring groove and encloses a flushing passage with the shaft sleeve (1) with a longitudinal section in a shape, and a flushing inlet (207) and a flushing outlet (208) which are communicated with the flushing passage are formed in the sealed box body (2).

2. The multifunctional double-end mechanical seal for the reaction kettle according to claim 1, wherein: the sealing box body (2) comprises a top end cover (201) located at the top end of the bearing (3), a bearing cover (202) which is fixedly connected with the bottom end of the top end cover (201) and is in interference fit with an outer ring of the bearing (3), a first static ring cover (203) which is fixedly connected with the bottom end of the bearing cover (202) and is sleeved with a first static ring seat (7), a second static ring cover (204) which is fixedly connected with a second static ring seat (8) and a flushing return pipe (11), a movable ring cover (205) which is fixedly arranged between the first static ring cover (203) and the second static ring cover (204), and a corrugated pipe seat (206) which is fixedly connected with the bottom end of the second static ring cover (204), wherein a bolt preformed hole is formed in the bottom of the corrugated pipe seat (206).

3. The multifunctional double-end-face mechanical seal for the reaction kettle according to claim 2, wherein: the shaft sleeve (1), the sealing box body (2), the first static ring seat (7) and the second static ring seat (8) enclose a second sealing cavity for sealing the movable ring (5) and the static ring (6), and the movable ring cover (205) is provided with a cooling medium inlet (209) and a cooling medium outlet (210) which are communicated with the second sealing cavity.

4. The multifunctional double-end-face mechanical seal for the reaction kettle according to claim 2, wherein: bearing oil seals (4) are arranged between the top end cover (201) and the bearing (3) and between the first static ring seat (7) and the bearing (3).

5. The multifunctional double-end mechanical seal for the reaction kettle according to claim 1, wherein: including sealing washer (12), between sealed box (2) and first quiet ring holder (7), between sealed box (2) and second quiet ring holder (8), between axle sleeve (1) and quiet ring (6) to and keep off and all be equipped with sealing washer (12) between lid (16) and (mixing) shaft (13), the sealing washer is O shape sealing washer.