CN218670627U

CN218670627U - Sealing structure of horizontal dynamic rake dryer

Info

Publication number: CN218670627U
Application number: CN202223040169.9U
Authority: CN
Inventors: 邓军兵; 苑志兵; 喻文勇
Original assignee: Zhejiang Chengxin Pharm & Chem Equipment Co ltd
Current assignee: Zhejiang Chengxin Pharm & Chem Equipment Co ltd
Priority date: 2022-11-15
Filing date: 2022-11-15
Publication date: 2023-03-21
Anticipated expiration: 2032-11-15

Abstract

The utility model provides a seal structure of horizontal developments harrow formula desiccator belongs to desiccator technical field. It has solved the easy problem of damaging of current seal structure. The drying machine comprises a main shaft arranged in a shell in a penetrating mode, wherein the sealing structure comprises a mechanical seal arranged between the shell and the main shaft, a sealing cavity arranged between the shell and the main shaft and a sealing plate sleeved outside the main shaft, a sealing channel is formed between the sealing plate and the shell, the sealing cavity is communicated with a working cavity in the drying machine through the sealing channel, a collecting cavity is arranged between the mechanical seal and the shell, and the collecting cavity and the sealing cavity are separated through the mechanical seal. The sealing structure has the advantages of preventing the mechanical seal from losing efficacy and prolonging the service life of the mechanical seal.

Description

Sealing structure of horizontal dynamic rake dryer

Technical Field

The utility model belongs to the technical field of the desiccator, a seal structure of horizontal developments harrow formula desiccator is related to.

Background

The rake vacuum drier is suitable for drying slurry, paste and powder material and may be used widely in medicine, food, chemical industry and other industry. The rake vacuum drier comprises a main shaft, and a mechanical seal is arranged outside the main shaft.

For example, chinese patent literature discloses a mechanical seal structure adapted to large axial displacement [ application No.: 201921987852.9; authorization notice number: CN210830485U ], which comprises an axle body, the axle body outside is provided with the axle sleeve, the axle sleeve outside is provided with the spring holder, the spring holder right side is provided with the throw-out collar, the spring holder top is provided with the stopper, be provided with drive screw in the spring holder, be provided with the cap screw in the stopper, drive screw and cap screw are corresponding, the inside holding screw that is provided with of axle sleeve, and holding screw sets up in the axle sleeve bottom, the axle sleeve bottom is provided with the rotating ring, the rotating ring left side is provided with the bearing liner ring, all be provided with the driving pin in bearing liner ring and the rotating ring, be provided with little spring oil blanket between rotating ring and the bearing liner ring, the rotating ring right side is provided with the stationary ring, the stationary ring outside is provided with the gland, be provided with the bolt in the gland, the bearing liner ring outside is provided with the bearing frame, be provided with thrust ball bearing and skeleton oil blanket in the bearing frame, the skeleton oil blanket sets up in thrust ball bearing both sides, be provided with the position sleeve between bearing liner ring and the gland.

The mechanical seal of this kind of structure, the axis body has along the problem of self axial float, and this just leads to the mechanical seal of this kind of structure when using in horizontal developments harrow formula vacuum drying machine, and the material has the problem of squeezing into the sealed inside, leads to mechanical seal to become invalid, reduces mechanical seal's life.

SUMMERY OF THE UTILITY MODEL

The utility model aims at the above-mentioned problem that exists among the prior art, provide a seal structure of horizontal developments harrow formula desiccator, the technical problem of solution makes mechanical seal be difficult for becoming invalid, improves mechanical seal's life.

The purpose of the utility model can be realized by the following technical proposal: the utility model provides a horizontal developments harrow formula desiccator's seal structure, the desiccator is including wearing to establish the main shaft in the casing, and seal structure is including setting up the mechanical seal between casing and main shaft, its characterized in that, seal structure still including setting up sealed chamber between casing and main shaft and the cover establish the closing plate outside the main shaft, form sealed passageway between closing plate and the casing, sealed chamber is linked together through the working chamber in sealed passageway and the desiccator, mechanical seal and casing between have and collect the chamber, it separates through mechanical seal to collect chamber and sealed chamber.

The sealed chamber lets in nitrogen gas, and nitrogen gas blows in the working chamber in the desiccator through sealed passageway, makes the material in the working chamber can not enter into mechanical seal, makes mechanical seal be difficult for becoming invalid, improves mechanical seal's life. When the mechanical seal works, foreign matters can be generated due to friction and enter the collecting cavity, and the collecting cavity is separated from the sealing cavity through the mechanical seal, namely the foreign matters cannot enter the working cavity in the dryer.

In the sealing structure of the horizontal dynamic rake dryer, the casing is provided with the air inlet and the air outlet, the air inlet is located at the top of the casing, the air outlet is located at the bottom of the casing, and the air inlet and the air outlet are both communicated with the collection cavity. The nitrogen is introduced from the air inlet, the foreign matters in the collecting cavity can be discharged from the air outlet, and the position relation between the air inlet and the air outlet can better enable the foreign matters to be discharged from the air outlet.

In the sealing structure of the horizontal dynamic rake dryer, the air inlet is far away from the sealing cavity relative to the air outlet along the axial direction of the main shaft. By adopting the structure, the influence of nitrogen introduced from the air inlet on the sealing cavity is smaller, and the mechanical seal is protected.

In the above sealing structure of the horizontal dynamic rake dryer, the mechanical seal includes a rotating ring fixedly connected to the main shaft and a pair of stationary rings fixedly connected to the housing, the pair of stationary rings are respectively located at two sides of the rotating ring along the axial direction of the main shaft, the length of the collecting cavity along the axial direction of the main shaft is greater than that of the rotating ring along the axial direction of the main shaft, and the friction surfaces of the stationary rings and the rotating ring are located at the end parts of two ends of the collecting cavity. The structure enables the mechanical seal and the collection cavity to be arranged along the axial direction of the main shaft, and the arrangement is reasonable.

In the sealing structure of the horizontal dynamic rake dryer, the housing further has a sealing opening therein, the sealing opening is located at the top of the housing, and the sealing opening is communicated with the sealing cavity. And introducing nitrogen into the sealed cavity through the sealed port.

In the sealing structure of the horizontal dynamic rake dryer, the sealing channel is formed by the sealing plate and the shell through a concave-convex structure, and the sealing channel is in a labyrinth shape. The structure has better sealing effect, and materials are not easy to enter the sealing cavity.

In the sealing structure of the horizontal dynamic rake dryer, the casing is further provided with a leakage detection port, the leakage detection port is positioned at the bottom of the casing, and the mechanical seal is positioned between the sealing cavity and the leakage detection port. The leakage detecting opening is arranged to play a detecting role and detect whether the mechanical seal is damaged or not.

Compared with the prior art, the utility model provides a pair of horizontal developments harrow formula desiccator's seal structure has following advantage:

1. according to the sealing structure of the dryer, nitrogen is filled into the sealing cavity, so that materials in the working cavity of the dryer cannot enter the mechanical seal, the mechanical seal is not prone to failure, and the service life of the mechanical seal is prolonged.

2. According to the sealing structure of the dryer, nitrogen is filled into the collecting cavity, and the mechanical seal discharges foreign matters generated by friction, so that the foreign matters cannot reversely enter the working cavity of the dryer.

Drawings

Fig. 1 is a sectional view showing the overall structure of the sealing structure of the dryer.

In the figure, 1, a housing; 2. a main shaft; 3. mechanical sealing; 31. a moving ring; 32. a stationary ring; 4. sealing the cavity; 5. a sealing plate; 6. sealing the channel; 7. a collection chamber; 8. an air inlet; 9. an air outlet; 10. sealing the opening; 11. and (6) detecting a leakage opening.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in fig. 1, the horizontal dynamic rake dryer includes a housing 1, a main shaft 2 and a sealing structure, wherein the main shaft 2 is inserted into the housing 1, and the sealing structure includes a mechanical seal 3, a sealing cavity 4 and a sealing plate 5.

A mechanical seal 3 is arranged between the housing 1 and the spindle 2, with a collection chamber 7 between the mechanical seal 3 and the housing 1. The mechanical seal 3 comprises a movable ring 31 fixedly connected with the main shaft 2 and a pair of stationary rings 32 fixedly connected with the shell 1, the pair of stationary rings 32 are respectively positioned at two sides of the movable ring 31 along the axial direction of the main shaft 2, the length of the collecting cavity 7 along the axial direction of the main shaft 2 is greater than that of the movable ring 31 along the axial direction of the main shaft 2, and the friction surfaces of the stationary rings 32 and the movable rings 31 are positioned at the end parts of two ends of the collecting cavity 7.

The shell 1 is internally provided with an air inlet 8 and an air outlet 9, the air inlet 8 is positioned at the top of the shell 1, the air outlet 9 is positioned at the bottom of the shell 1, the air inlet 8 and the air outlet 9 are communicated with the collecting cavity 7, and the air inlet 8 is far away from the sealing cavity 4 relative to the air outlet 9 along the axial direction of the main shaft 2.

The seal cavity 4 is located between the shell 1 and the main shaft 2, the shell 1 is provided with a seal port 10, the seal port 10 is located at the top of the shell 1, and the seal port 10 is communicated with the seal cavity 4. The sealing plate 5 is sleeved outside the main shaft 2, the sealing plate 5 and the shell 1 form a sealing channel 6 through a concave-convex structure, the sealing channel 6 is in a labyrinth shape, the sealing cavity 4 is communicated with a working cavity in the drying machine through the sealing channel 6, and the collecting cavity 7 is separated from the sealing cavity 4 through the mechanical seal 3. The shell 1 is also provided with a leakage detection port 11, the leakage detection port 11 is positioned at the bottom of the shell 1, and the mechanical seal 3 is positioned between the seal cavity 4 and the leakage detection port.

When the dryer works, nitrogen is introduced from the sealing port 10 and enters the working cavity of the dryer through the sealing cavity 4 and the sealing channel 6. When the foreign matters are purged, nitrogen is introduced from the air inlet 8, the nitrogen is discharged from the air outlet 9 through the collection cavity 7, and the foreign matters are discharged along with the nitrogen.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions may be made by those skilled in the art to the specific embodiments described without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Although the terms housing 1, main shaft 2, mechanical seal 3, moving ring 31, stationary ring 32, seal chamber 4, seal plate 5, seal channel 6, collection chamber 7, gas inlet 8, gas outlet 9, seal port 10, leak port 11, etc. are used more herein, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed in a manner that is inconsistent with the spirit of the invention.

Claims

1. The utility model provides a seal structure of horizontal developments harrow formula desiccator, the desiccator is including wearing to establish main shaft (2) in casing (1), seal structure is including setting up mechanical seal (3) between casing (1) and main shaft (2), its characterized in that, seal structure is still including setting up sealed chamber (4) between casing (1) and main shaft (2) and establishing closing plate (5) outside main shaft (2), form sealed passageway (6) between closing plate (5) and casing (1), sealed chamber (4) are linked together through sealed passageway (6) and the working chamber in the desiccator, mechanical seal (3) and casing (1) between have collection chamber (7), it separates through mechanical seal (3) to collect chamber (7) and sealed chamber (4).

2. Sealing structure of horizontal dynamic rake dryer according to claim 1, characterized in that the housing (1) has an air inlet (8) and an air outlet (9), the air inlet (8) is located at the top of the housing (1), the air outlet (9) is located at the bottom of the housing (1), and the air inlet (8) and the air outlet (9) are both connected to the collecting chamber (7).

3. Sealing structure of a horizontal dynamic rake dryer according to claim 2, characterized in that the air inlet (8) is distanced from the sealing chamber (4) with respect to the air outlet (9) in the axial direction of the main shaft (2).

4. The sealing structure of the horizontal dynamic rake dryer according to claim 1, 2 or 3, wherein the mechanical seal (3) comprises a movable ring (31) fixedly connected with the main shaft (2) and a pair of stationary rings (32) fixedly connected with the housing (1), the pair of stationary rings (32) are respectively located at two sides of the movable ring (31) along the axial direction of the main shaft (2), the length of the collecting cavity (7) along the axial direction of the main shaft (2) is greater than that of the movable ring (31) along the axial direction of the main shaft (2), and the friction surfaces of the stationary rings (32) and the movable rings (31) are located at the end parts of two ends of the collecting cavity (7).

5. Sealing structure of horizontal dynamic rake dryer according to claim 1 or 2 or 3, characterized in that the housing (1) further has a sealing port (10), the sealing port (10) is located at the top of the housing (1), the sealing port (10) is communicated with the sealing chamber (4).

6. The sealing structure of the horizontal dynamic rake dryer according to claim 1, 2 or 3, wherein the sealing channel (6) is formed by a sealing plate (5) and a shell (1) through a concave-convex structure, and the sealing channel (6) is in a labyrinth shape.

7. Sealing structure of a horizontal dynamic rake dryer according to claim 1, 2 or 3, characterized in that the casing (1) further has a leak detection opening (11), the leak detection opening (11) is located at the bottom of the casing (1), and the mechanical seal (3) is located between the sealing cavity (4) and the leak detection opening.