A wet granulator stirring spindle sealing structure

Abstract

The utility model relates to wet granulator stirring main shaft sealing related technical field discloses a kind of wet granulator stirring main shaft sealing structure, including end cover and fixed shaft;The fixed shaft is arranged in the shaft hole in the middle part of end cover, and sealing sleeve is arranged between the fixed shaft and shaft hole, the upper end of the sealing sleeve is flush with the upper end of end cover, the upper end of the sealing sleeve is attached with sealing pad, and the sealing pad is sleeved on the outer surface of the upper end of fixed shaft.The wet granulator stirring main shaft sealing structure, sealing between the fixed shaft and shaft hole is carried out by sealing sleeve, sealing pad is attached and set in the connecting place of the upper end of end cover and fixed shaft, further improve sealing effect, reach the effect of double sealing, heat dissipation component is embedded in movable pressing plate, improve the heat dissipation effect of connecting place, prevent heat accumulation, sealing pad can be replaced, prevent wear and tear during long-term use from leading to sealing failure.

Description

Technical Field

[0001] This utility model relates to the technical field of sealing the mixing shaft of a wet granulator, specifically a sealing structure for the mixing shaft of a wet granulator. Background Technology

[0002] In granulation processes used in pharmaceuticals, food, and chemicals, wet granulation machines are one of the core pieces of equipment. They use a stirring shaft to drive a high-speed rotating impeller, achieving the mixing and granulation of materials and binders. The sealing structure of the stirring shaft, as a critical component, directly affects the equipment's operational stability, material purity, and production safety.

[0003] As disclosed in CN205948824U, a sealing structure for the stirring mechanism of a wet granulation machine includes a frame, a granulation pot, and a stirring mechanism. The stirring mechanism includes a stirring paddle and a drive shaft. A bushing is fitted around the drive shaft and connected to the drive shaft via a bearing. The upper end of the bushing extends into the granulation pot and is sealed to the inner wall of the bottom of the granulation pot. The lower part of the stirring paddle has a cavity. The upper end of the bushing extends into the cavity of the stirring paddle and transitions with the side wall of the cavity to form an annular first sealing channel. The upper end of the bushing, the inner wall of the cavity, and the drive shaft form a buffer cavity. The stirring paddle transitions with the inner wall of the bottom of the granulation pot to form an annular second sealing channel. The second sealing channel communicates with the first sealing channel, and the first sealing channel communicates with the buffer cavity. The bushing has several air inlet channels communicating with the buffer cavity, thereby effectively preventing dust particles from entering the rotation gap of the drive shaft.

[0004] However, existing technologies have problems such as the sealing components being prone to wear and failure during high-speed operation, making maintenance and replacement inconvenient, and heat easily accumulating at the sealing points, resulting in poor heat dissipation. For example, the comparative patents listed above have this problem.

[0005] Therefore, this utility model provides a sealing structure for the mixing shaft of a wet granulation machine to solve the problems mentioned above. Utility Model Content

[0006] The purpose of this utility model is to provide a sealing structure for the mixing shaft of a wet granulator, so as to solve the problems mentioned in the background art, that the sealing components are prone to wear and failure during high-speed operation, which is inconvenient to maintain and replace, and that heat is easily accumulated at the sealing point, resulting in poor heat dissipation.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a sealing structure for the mixing shaft of a wet granulation machine, comprising an end cover and a fixed shaft;

[0008] Also includes:

[0009] The fixed shaft passes through the shaft hole opened in the middle of the end cover, and a sealing sleeve is provided between the fixed shaft and the shaft hole. A fixing key is fixed on the inner side of the sealing sleeve.

[0010] The upper end of the sealing sleeve is flush with the upper end of the end cover. A sealing gasket is fitted to the upper end of the sealing sleeve. The sealing gasket is sleeved on the outer surface of the upper end of the fixed shaft. A movable pressure plate for pressing and limiting is fitted to the upper end of the sealing gasket. A heat dissipation component is provided in the movable pressure plate. The movable pressure plate and the sealing gasket form a detachable structure at the upper end of the end cover.

[0011] Preferably, the sealing sleeve is fitted inside the shaft hole, and the fixing key is engaged in the corresponding keyway opened on the outside of the fixing shaft.

[0012] Preferably, the lower end of the movable pressure plate is fixed with protrusions for positioning on both the left and right sides, and the protrusions are inserted into the end cover. The upper end of the movable pressure plate is provided with a mounting groove, and a heat dissipation component is embedded in the mounting groove.

[0013] Preferably, the heat dissipation assembly includes a heat sink and heat dissipation fins evenly distributed at the upper and lower ends of the heat sink.

[0014] Preferably, both ends of the movable pressure plate are fixedly connected to a fixing block with an inclined outer surface, and the movable pressure plate and the end cover are limited by fixing components symmetrically arranged on the left and right sides of the movable pressure plate.

[0015] Preferably, the fixing assembly includes a movable pressure block for pressing and fixing, a movable plate fixed to the outside of the movable pressure block, a fixing plate fixed to the upper end of the end cap, a fixing rod fixed to the upper outer side of the fixing plate, and a fixing cap threaded to the outer surface of the fixing rod.

[0016] Preferably, the movable pressure block and the fixed block are tightly fitted together, and the inner surface of the movable pressure block matches the outer inclined surface of the fixed block.

[0017] Preferably, the movable plate and the fixed plate form a left-right sliding structure, a fixed rod is provided through the end of the movable plate away from the movable pressure block, and the movable plate and the fixed cap are fitted together.

[0018] Compared with the prior art, the beneficial effects of this utility model are as follows: The sealing structure of the mixing shaft of the wet granulator seals the fixed shaft and the shaft hole through the sealing sleeve, and the sealing gasket is fitted to the connection between the upper end of the end cover and the fixed shaft, which further improves the sealing effect and achieves a double sealing effect. The sealing gasket is pressed and fixed by the movable pressure plate, which improves the tightness of the sealing gasket. Moreover, the movable pressure plate is embedded with heat dissipation components to improve the heat dissipation effect at the connection and prevent heat accumulation. Furthermore, the sealing gasket can be quickly and conveniently replaced by disassembling the movable pressure plate, preventing wear and tear during long-term use that could lead to sealing failure.

[0019] 1. It is equipped with a sealing sleeve, a fixing key and a sealing gasket. The sealing sleeve and sealing gasket are both fitted on the outside of the fixed shaft, which can achieve a double sealing effect. Moreover, the fixing key is engaged in the keyway, which improves the stability of the sealing sleeve outside the fixed shaft.

[0020] 2. It is equipped with a movable pressure plate and a heat dissipation component. The movable pressure plate presses and fixes the sealing gasket, improving the stability of the sealing gasket. Combined with the heat dissipation component, it can dissipate the heat at the connection point to the outside, avoiding heat accumulation.

[0021] 3. A fixing component is provided, symmetrically arranged on the left and right sides of the movable pressure plate. It includes a movable pressure block, a movable plate, a fixed plate, a fixed rod, and a fixed cap. The fixing component facilitates the limiting of the movable pressure plate and allows the sealing gasket to be disassembled and replaced. Attached Figure Description

[0022] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0023] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0024] Figure 2 This is a frontal sectional view of the present invention.

[0025] Figure 3 This is an exploded structural diagram of the fixed shaft and sealing sleeve of this utility model;

[0026] Figure 4 This is an exploded view of the sealing gasket, movable pressure plate, and heat sink of this utility model;

[0027] Figure 5 This utility model Figure 1 Enlarged structural diagram at point A in the middle;

[0028] Figure 6 This is a bottom view of the overall structure of the fixing component of this utility model.

[0029] In the diagram: 1. End cap; 2. Shaft hole; 3. Fixed shaft; 4. Keyway; 5. Sealing sleeve; 6. Fixed key; 7. Sealing gasket; 8. Movable pressure plate; 9. Protrusion; 10. Mounting groove; 11. Heat sink; 12. Heat sink fin; 13. Fixed block; 14. Movable pressure block; 15. Movable plate; 16. Fixed plate; 17. Fixed rod; 18. Fixed cap. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] Please see Figures 1-6 The present invention provides the following technical solution:

[0032] To address the problems in existing technologies where sealing components are prone to wear and failure during high-speed operation, making maintenance and replacement inconvenient, and where heat easily accumulates at the seal, resulting in poor heat dissipation, this solution provides a sealing structure for the mixing shaft of a wet granulator. The structure includes an end cover 1 and a fixed shaft 3. The fixed shaft 3 passes through a shaft hole 2 located in the middle of the end cover 1. A sealing sleeve 5 is provided between the fixed shaft 3 and the shaft hole 2. A fixing key 6 is fixed to the inner side of the sealing sleeve 5. The upper end of the sealing sleeve 5 is flush with the upper end of the end cover 1. A sealing gasket 7 is fitted onto the upper end of the sealing sleeve 5 and is sleeved on the outer surface of the upper end of the fixed shaft 3. A movable pressure plate 8 for pressing and limiting is fitted onto the upper end of the sealing gasket 7. A heat dissipation component is also provided in the movable pressure plate 8. The movable pressure plate 8 and the sealing gasket 7 form a detachable structure at the upper end of the end cover 1.

[0033] like Figure 1 , Figure 2 and Figure 3As shown, the sealing sleeve 5 is fitted onto the outside of the fixed shaft 3 and fits snugly against the inside of the shaft hole 2. Simultaneously, the sealing sleeve 5 drives the fixed key 6 to engage in the keyway 4 on the outer wall of the fixed shaft 3, positioning the sealing sleeve 5. The upper end of the sealing sleeve 5 is flush with the upper end of the end cover 1. The sealing gasket 7 is fitted onto the outside of the fixed shaft 3, with its inner diameter equal to the diameter of the fixed shaft 3. The sealing gasket 7 fits snugly against the upper end of the sealing sleeve 5. Then, the movable pressure plate 8 is fitted onto the outside of the fixed shaft 3. The movable pressure plate 8 drives the protrusion 9 to insert into the upper end of the end cover 1, positioning the movable pressure plate 8 and the end cover 1. Simultaneously, the movable pressure plate 8 presses and limits the sealing gasket 7. Through the arrangement of the sealing gasket 7 and the sealing sleeve 5, a double sealing effect is achieved at the connection between the shaft hole 2 and the end cover 1. Figure 4 As shown, a heat dissipation component is embedded in the movable pressure plate 8, which includes a heat sink 11 and a heat dissipation fin 12. The lower heat dissipation fin 12 is engaged in the mounting groove 10 to increase the contact area with the movable pressure plate 8. Heat is conducted outward through the heat sink 11 and the upper heat dissipation fin 12 to provide heat dissipation protection for the connection.

[0034] Combined with the settings of fixed components, such as Figure 5 and Figure 6 As shown, the fixing assembly includes a movable pressure block 14 for clamping and fixing, a movable plate 15 fixed to the outside of the movable pressure block 14, a fixed plate 16 fixed to the upper end of the end cap 1, a fixing rod 17 fixed to the outer side of the upper end of the fixed plate 16, and a fixing cap 18 threaded to the outer surface of the fixing rod 17. The movable plate 15 slides between itself and the fixed plate 16, and also slides between itself and the fixing rod 17. The movable pressure block 14 and the fixed block 13 are tightly fitted together, and the inner surface of the movable pressure block 14 is flush with the fixed block 13. The outer slope fits together to press down and fix the movable pressure plate 8. At the same time, the movable pressure plate 8 squeezes and fixes the sealing gasket 7, improving the tightness of the sealing gasket 7 during use. Then, rotate the fixing cap 18 that is threaded to the outer surface of the fixing rod 17. The fixing cap 18 is fitted to the outer side of the movable plate 15, which facilitates the fixing of the movable pressure block 14. In addition, the movable pressure plate 8 can be disassembled by reversing the above operation, which makes it easy to disassemble and replace the sealing gasket 7 when it is worn.

[0035] All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. In addition, the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here.

[0036] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A sealing structure for the mixing shaft of a wet granulation machine, comprising an end cap (1) and a fixed shaft (3); Its features are, Also includes: The fixed shaft (3) passes through the shaft hole (2) opened in the middle of the end cover (1), and a sealing sleeve (5) is provided between the fixed shaft (3) and the shaft hole (2). A fixing key (6) is fixed on the inner side of the sealing sleeve (5). The upper end of the sealing sleeve (5) is flush with the upper end of the end cover (1). A sealing gasket (7) is fitted to the upper end of the sealing sleeve (5). The sealing gasket (7) is fitted onto the outer surface of the upper end of the fixed shaft (3). A movable pressure plate (8) for pressing and limiting is fitted to the upper end of the sealing gasket (7). A heat dissipation component is provided in the movable pressure plate (8). The movable pressure plate (8) and the sealing gasket (7) form a disassembly structure at the upper end of the end cover (1).

2. The sealing structure for the mixing shaft of a wet granulator according to claim 1, characterized in that: The sealing sleeve (5) is fitted inside the shaft hole (2), and the fixing key (6) is engaged in the keyway (4) corresponding to the outside of the fixing shaft (3).

3. The sealing structure for the mixing shaft of a wet granulator according to claim 1, characterized in that: The lower end of the movable pressure plate (8) is fixed with protrusions (9) for positioning on both the left and right sides, and the protrusions (9) are inserted into the end cover (1). The upper end of the movable pressure plate (8) is provided with a mounting groove (10), and a heat dissipation component is embedded in the mounting groove (10).

4. The sealing structure for the mixing shaft of a wet granulator according to claim 1, characterized in that: The heat dissipation assembly includes a heat sink (11) and heat dissipation fins (12) evenly distributed at the upper and lower ends of the heat sink (11).

5. The sealing structure for the mixing shaft of a wet granulator according to claim 3, characterized in that: The movable pressure plate (8) is fixedly connected to the left and right ends of the movable pressure plate (8) with a fixed block (13) whose outer side is designed to be inclined. The movable pressure plate (8) and the end cover (1) are limited by the fixed components symmetrically arranged on the left and right sides of the movable pressure plate (8).

6. The sealing structure for the mixing shaft of a wet granulator according to claim 5, characterized in that: The fixing assembly includes a movable pressure block (14) for pressing and fixing, a movable plate (15) fixed to the outside of the movable pressure block (14), a fixing plate (16) fixed to the upper end of the end cap (1), a fixing rod (17) fixed to the outer side of the upper end of the fixing plate (16), and a fixing cap (18) threaded to the outer surface of the fixing rod (17).

7. The sealing structure for the mixing shaft of a wet granulator according to claim 6, characterized in that: The movable pressure block (14) and the fixed block (13) are closely fitted together, and the inner side of the movable pressure block (14) matches the outer slope of the fixed block (13).

8. The sealing structure for the mixing shaft of a wet granulator according to claim 6, characterized in that: The movable plate (15) and the fixed plate (16) form a left-right sliding structure. A fixed rod (17) is provided through the end of the movable plate (15) away from the movable pressure block (14). The movable plate (15) and the fixed cap (18) are fitted together.

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