Double-end-face sealing structure

Abstract

The utility model discloses a double-end-face sealing structure, which belongs to the technical field of reaction kettle sealing, and comprises a shell and a main shaft, the shell comprises an upper shell and a lower shell, a sealing cavity jacket is arranged between the upper shell and the lower shell, a sealing assembly is arranged in the lower shell and the sealing cavity jacket, and the main shaft is positioned in the sealing assembly. According to the utility model, the shell and the sealing cavity jacket are arranged, and the sealing assembly is protected by the upper shell and the sealing cavity jacket, so that the time for lubricating oil to permeate into the sealing assembly is prolonged, a worker has sufficient time to find leakage, and the functions of blocking permeation and reducing the failure rate are realized; the volume of the sealing cavity is reduced through the sealing cavity jacket, so that the sealing liquid is saved, the service life of the main shaft is prolonged by arranging the sealing assembly and protecting the main shaft through the shaft sleeve, and the sealing liquid can be automatically pumped by utilizing the rotation of the main shaft when the reaction kettle works by arranging the effect ring, so that the effects of protecting the main shaft and self-circulating the sealing liquid are realized.

Description

TECHNICAL FIELD

[0001] The utility model relates to reaction kettle sealing technical field especially relates to a double end surface sealing structure. BACKGROUND

[0002] Reaction kettle is a kind of comprehensive reaction container for carrying out physical or chemical reaction, stirring rod driven by motor is arranged in reaction kettle, to ensure the sealing property in kettle body, mechanical seal is arranged at the connecting place of reaction kettle and motor, mechanical seal includes oil seal structure and double end surface sealing structure, oil seal structure prevents the lubricating oil in motor from leaking, and double end surface sealing structure is used to prevent the leakage of substance in reaction kettle;

[0003] The existing double end surface sealing structure fills sealing liquid in sealing cavity to realize "zero leakage" effect, but double end surface sealing structure is close to oil seal structure, if worker does not find that oil seal structure fails in time, then it will lead to lubricating oil entering sealing cavity, and the efficiency of liquid seal is affected, sealing liquid circulation assembly needs to be replaced, and working fault tolerance is low;

[0004] The existing double end surface sealing structure directly uses sealing structure and its shell as shaft sleeve, sealing and main shaft are directly contacted during use, wear is easily generated, and then sealing failure is caused. UTILITY MODEL CONTENTS

[0005] The utility model aims at solving the problems of low working fault tolerance of reaction kettle sealing and easy wear of main shaft in prior art, and provides a double end surface sealing structure.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0007] 1. A double end surface sealing structure, comprising a shell and a main shaft, the shell comprises an upper shell body and a lower shell body, a sealing cavity sleeve is arranged between the upper shell body and the lower shell body, a sealing assembly is arranged in the sealing cavity sleeve and the lower shell body, and the main shaft is located inside the sealing assembly.

[0008] The sealing assembly comprises a shaft sleeve, a medium side sealing assembly is arranged on the outer wall of the bottom of the shaft sleeve, an atmosphere side sealing assembly is arranged on the outer wall of the top of the shaft sleeve, and the medium side sealing assembly and the atmosphere side sealing assembly are oppositely arranged.

[0009] Preferably, the bottom of the upper shell body is fixedly connected with the sealing cavity sleeve, and the bottom of the sealing cavity sleeve is fixedly connected with the lower shell body.

[0010] Preferably, a liquid inlet is formed in one side of the upper shell body, a drainage port is formed in one side of the sealing cavity sleeve corresponding to the liquid inlet, and a liquid outlet is formed in one side of the lower shell body.

[0011] Preferably, the outer wall of the center of the shaft sleeve is fixedly provided with a pump efficiency ring.

[0012] Preferably, the medium side sealing assembly comprises a medium side movable ring, the top of the medium side movable ring is matched with the bottom of the shaft sleeve, and the bottom of the medium side movable ring is matched with a medium side static ring.

[0013] Preferably, the atmospheric side sealing assembly comprises an atmospheric side movable ring, the bottom of the atmospheric side movable ring is matched with the top of the pump efficiency ring, and the top of the atmospheric side movable ring is matched with an atmospheric side static ring.

[0014] Preferably, the bottom of the medium side static ring and the top of the atmospheric side static ring are provided with anti-rotation pins, the medium side static ring is connected with the lower shell through the anti-rotation pins, and the atmospheric side static ring is connected with the sealing cavity outer sleeve through the anti-rotation pins.

[0015] Preferably, the medium side static ring is provided with sealing rings between the medium side movable ring, the atmospheric side movable ring and the atmospheric side static ring.

[0016] Preferably, the medium side movable ring and the atmospheric side movable ring are provided with movable ring springs between the medium side movable ring and the atmospheric side movable ring and the shaft sleeve.

[0017] Compared with the prior art, the utility model has the beneficial effects that:

[0018] 1. The utility model discloses a sealing assembly is protected by the upper shell body and the sealing cavity outer sleeve, and the time required for lubricating oil to penetrate to the sealing assembly is prolonged, so that workers have sufficient time to find leakage, the function of hindering penetration and reducing the failure rate is realized, simultaneously, the volume of the sealing cavity is reduced through the sealing cavity outer sleeve, and the use of sealing liquid is saved.

[0019] 2. The utility model discloses a sealing assembly is protected by the shaft sleeve, and when the main shaft rotates, the large-area shaft body is covered by the shaft sleeve and is rubbed with the sealing assembly, so that the abrasion of the main shaft is reduced, and the service life of the main shaft is improved, and through the setting of the efficiency ring, the sealing liquid can be automatically pumped when the reaction kettle works, the effect of protecting the main shaft and self-circulating sealing liquid is realized. DRAWINGS

[0020] Figure 1 It is a three-dimensional structure schematic view of a double-end-face sealing structure of the utility model;

[0021] Figure 2 It is a three-dimensional structure sectional view of a double-end-face sealing structure of the utility model;

[0022] Figure 3 It is a structure assembly drawing of a double-end-face sealing structure of the utility model;

[0023] Figure 4 The utility model provides a structure assembly drawing of a sealing assembly in a double end face sealing structure.

[0024] In the figure: 1, main shaft, 2, upper shell, 3, lower shell, 4, sealing cavity outer sleeve, 5, shaft sleeve, 6, liquid inlet, 7, drainage port, 8, liquid outlet, 9, pump efficiency ring, 10, medium side moving ring, 11, medium side static ring, 12, atmospheric side moving ring, 13, atmospheric side static ring, 14, anti-rotation pin, 15, sealing ring, 16, moving ring spring. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the utility model will be apparently and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0026] Reference Figures 1-4 A double end face sealing structure, comprising a shell and a main shaft 1, the shell comprises an upper shell 2 and a lower shell 3, a sealing cavity outer sleeve 4 is arranged between the upper shell 2 and the lower shell 3, a sealing assembly is arranged in the sealing cavity outer sleeve 4, and the main shaft 1 is located in the sealing assembly.

[0027] The sealing assembly comprises a shaft sleeve 5, the outer wall of the bottom of the shaft sleeve 5 is provided with a medium side sealing assembly, the outer wall of the top of the shaft sleeve 5 is provided with an atmospheric side sealing assembly, and the medium side sealing assembly and the atmospheric side sealing assembly are oppositely arranged.

[0028] Further, the bottom of the upper shell 2 is fixedly connected with the sealing cavity outer sleeve 4, the bottom of the sealing cavity outer sleeve 4 is fixedly connected with the lower shell 3, one side of the upper shell 2 is provided with a liquid inlet 6, one side of the sealing cavity outer sleeve 4 is provided with a drainage port 7 corresponding to the liquid inlet, and one side of the lower shell 3 is provided with a liquid outlet 8.

[0029] The further benefits of the above are that the sealing assembly is protected by the upper shell 2 and the sealing cavity outer sleeve 4, the time required for lubricating oil to penetrate into the sealing assembly is prolonged, the volume of the sealing cavity is reduced through the sealing cavity outer sleeve 4, and sealing liquid is saved.

[0030] Further, the outer wall of the center of the shaft sleeve 5 is fixedly installed with a pump efficiency ring 9.

[0031] It should be noted that the outer wall of the pump efficiency ring 9 is provided with a spiral groove, and when the reaction kettle works, the main shaft 1 is rotated to drive the pump efficiency ring 9 to rotate, and the sealing liquid is automatically pumped through the spiral groove.

[0032] Further, the medium side sealing assembly comprises a medium side dynamic ring 10, the top of the medium side dynamic ring 10 is matched with the bottom of the shaft sleeve 5, the bottom of the medium side dynamic ring 10 is matched with a medium side static ring 11, the atmospheric side sealing assembly comprises an atmospheric side dynamic ring 12, the bottom of the atmospheric side dynamic ring 12 is matched with the top of the pump efficiency ring 9, the top of the atmospheric side dynamic ring 12 is matched with an atmospheric side static ring 13, the bottom of the medium side static ring 11 and the top of the atmospheric side static ring 13 are provided with anti-rotation pins 14, the medium side static ring 11 is connected with the lower shell 3 through the anti-rotation pins 14, and the atmospheric side static ring 13 is connected with the sealing cavity sleeve 4 through the anti-rotation pins 14.

[0033] The further advantage is that the main shaft 1 is protected by the shaft sleeve 5, and wear of the main shaft 1 is avoided.

[0034] Further, the medium side static ring 11 is provided with a sealing ring 15 between the medium side dynamic ring 10, the atmospheric side dynamic ring 12 and the atmospheric side static ring 13, and the medium side dynamic ring 10 and the atmospheric side dynamic ring 12 are provided with dynamic ring springs 16 between the shaft sleeve 5, so that the end face sealing pair is well adhered and the dynamic ring is followed through the compensation and pre-tightening effect of the dynamic ring springs 16.

[0035] When the reaction kettle works, the motor drives the main shaft 1 to rotate, the main shaft 1 is covered by the shaft sleeve 5 in a large area when rotating, and the main shaft 1 is abraded by the friction between the shaft sleeve 5 and the sealing assembly, so that the service life of the main shaft 1 is prolonged, and the pump efficiency ring 9 located on the outer wall of the shaft sleeve 5 is synchronously rotated by the rotation of the main shaft 1, the sealing liquid is automatically pumped through the spiral groove on the outer wall when the pump efficiency ring 9 rotates, and the function of self-circulating sealing liquid is realized.

[0036] When the oil seal fails and lubricating oil leaks, the sealing assembly is protected by the upper shell 2 and the sealing cavity sleeve 4, and the lubricating oil needs to penetrate the upper shell 2, the sealing cavity sleeve 4 and the atmospheric side static ring 13 in sequence to enter the sealing cavity, so that the time required for the lubricating oil to penetrate is prolonged, so that the workers have sufficient time to find the leakage, and the function of hindering penetration and reducing the failure rate is realized.

[0037] The above is only a preferred specific embodiment of the utility model, but the protection scope of the utility model is not limited to this, any skilled person in the art can make equivalent replacement or change according to the technical scheme and the utility model concept of the utility model within the technical range disclosed by the utility model, which should be covered in the protection scope of the utility model.

Claims

1. A double face seal structure comprising a housing and a main shaft (1), characterized in that, The shell comprises an upper shell (2) and a lower shell (3), a sealing cavity sleeve (4) is arranged between the upper shell (2) and the lower shell (3), a sealing assembly is arranged in the sealing cavity sleeve (4), and the main shaft (1) is located inside the sealing assembly; The sealing assembly comprises a shaft sleeve (5), an outer wall at the bottom of the shaft sleeve (5) is provided with a medium side sealing assembly, an outer wall at the top of the shaft sleeve (5) is provided with an atmosphere side sealing assembly, and the medium side sealing assembly and the atmosphere side sealing assembly are oppositely arranged.

2. A double seal structure according to claim 1, wherein: The bottom of the upper shell (2) is fixedly connected with the sealing cavity sleeve (4), and the bottom of the sealing cavity sleeve (4) is fixedly connected with the lower shell (3).

3. A double seal structure according to claim 2, wherein: One side of the upper shell (2) is provided with a liquid inlet (6), one side of the sealing cavity sleeve (4) is provided with a drainage port (7) corresponding to the liquid inlet, and one side of the lower shell (3) is provided with a liquid outlet (8).

4. The double seal structure of claim 1, wherein: An outer wall at the center of the shaft sleeve (5) is fixedly provided with a pump efficiency ring (9).

5. A double seal structure according to claim 4, wherein: The medium side sealing assembly comprises a medium side dynamic ring (10), the top of the medium side dynamic ring (10) is matched with the bottom of the shaft sleeve (5), and the bottom of the medium side dynamic ring (10) is matched with a medium side static ring (11).

6. A double seal structure according to claim 5, wherein: The atmosphere side sealing assembly comprises an atmosphere side dynamic ring (12), the bottom of the atmosphere side dynamic ring (12) is matched with the top of the pump efficiency ring (9), and the top of the atmosphere side dynamic ring (12) is matched with an atmosphere side static ring (13).

7. A double seal structure according to claim 6, wherein: The bottom of the medium side static ring (11) and the top of the atmosphere side static ring (13) are provided with anti-rotation pins (14), the medium side static ring (11) is connected with the lower shell (3) through the anti-rotation pins (14), and the atmosphere side static ring (13) is connected with the sealing cavity sleeve (4) through the anti-rotation pins (14).

8. The double seal structure of claim 6, wherein: Sealing rings (15) are arranged between the medium side static ring (11) and the medium side dynamic ring (10), the atmosphere side dynamic ring (12) and the atmosphere side static ring (13).

9. A double seal structure according to claim 8, wherein: Dynamic ring springs (16) are arranged between the medium side dynamic ring (10) and the shaft sleeve (5) and between the atmosphere side dynamic ring (12) and the shaft sleeve (5).

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