Shaft seal mechanism used for kneading machine stirring paddle shaft and aiming at tiny powder materials

Abstract

The utility model relates to a shaft seal mechanism for a kneading machine stirring paddle shaft aiming at tiny powder materials, which comprises a shell, a gland, a framework oil seal, a spacer bush and a filler, the shell comprises a sleeve-shaped main body, an inner connecting flange, an annular positioning step, an inner annular boss and an outer connecting flange, and the filler and the framework oil seal are arranged between the sleeve-shaped main body and the stirring paddle shaft. The gland is connected with the outer connecting flange of the shell, an axial pressing table of the gland is extruded on the outer side of the filler, the framework oil seals are installed on the inner side of the inner annular boss, the spacer bushes are installed between the multiple framework oil seals, and the inner sides of the multiple framework oil seals are extruded on the bottom of the annular groove. And an inflating hole for inflating inert gas is formed in the sleeve-shaped main body corresponding to the mounting position of the spacer bush. The sealing device has the advantages of being ingenious in design, reasonable and compact in structure, good in sealing effect and durable, effectively eradicating leakage of tiny powder, reducing abrasion of materials to the shaft neck position, and prolonging the service life. The vacuum degree in the cylinder is improved; the product quality is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of kneading machine, concretely relates to a shaft seal mechanism for extremely small powder material for kneading machine stirring paddle shaft. BACKGROUND

[0002] The vacuum kneading machine is widely used in the following fields: chemical production: suitable for the production of silicone rubber, glass glue, butyl rubber, hot melt adhesive and the like. Food industry: can be used for the production of food glue. Pharmaceutical preparation: ensure the purity and quality of the medicine. Other fields: such as the production of chewing gum, chocolate, plastic, rubber and the like. The function of vacuuming improves the product quality. Through vacuuming, the kneading machine can effectively remove the air bubbles in the liquid mixture, ensure that the final product has no air bubbles, and thus improve the appearance and performance of the product. For the stirring of extremely small powder material, the shaft seal mechanism of the installation position of the stirring paddle shaft is very important. However, the traditional shaft seal mechanism is easy to wear and tear, and the sealing effect is not good, which cannot meet the kneading and processing requirements of the kneading machine. SUMMARY

[0003] In order to solve the above technical problems, the utility model provides a shaft seal mechanism for extremely small powder material for kneading machine stirring paddle shaft, which is designed ingeniously, has a reasonable and compact structure, good sealing effect and durability.

[0004] The technical scheme of the utility model comprises the following steps:

[0005] This is a shaft sealing mechanism for the mixing impeller shaft of a kneader, designed for extremely fine powder materials. The mixing impeller shaft of the kneader is mounted on the side plate of the kneader's cylinder via the shaft sealing mechanism. The shaft sealing mechanism includes a housing, a pressure cap, a skeleton oil seal, a spacer, and packing. The housing includes a sleeve-shaped body, an inner connecting flange, an annular positioning step, an inner annular boss, and an outer connecting flange. The inner end of the sleeve-shaped body has an axially protruding annular positioning step. The outer circumference of the sleeve-shaped body near the inner end has an inner connecting flange, and the outer circumference of the sleeve-shaped body near the end has an outer connecting flange. The inner hole of the sleeve-shaped body near the middle has a radially protruding inner annular boss. The side plate of the cylinder has a circular hole for mounting the mixing impeller shaft, and the outer opening of the circular hole has an annular groove. After the mixing impeller shaft passes through the circular hole, the sleeve-shaped body is fitted onto the outside of the mixing impeller shaft. The sleeve-shaped body is connected via an annular groove. The positioning step is installed in the annular groove, and the sleeve-shaped body is installed on the outside of the side plate of the cylinder body through the inner connecting flange. The sleeve-shaped body and the impeller shaft are equipped with packing and a skeleton oil seal. The packing is installed on the outside of the inner annular boss, and the gland is also sleeved on the outside of the impeller shaft. The inner side of the gland is designed with an axial pressure plate. The gland is connected to the outer connecting flange of the shell, and the axial pressure plate of the gland is pressed against the outside of the packing. The inner side of the packing is pressed against the outside of the inner annular boss. The skeleton oil seal is designed with multiple layers. The skeleton oil seal is installed on the inner side of the inner annular boss. Spacers are installed between the multiple skeleton oil seals. The outer side of the multiple skeleton oil seals is pressed against the inner side of the inner annular platform. The inner side of the multiple skeleton oil seals is pressed against the bottom of the annular groove. The sleeve-shaped body corresponding to the spacer installation position is provided with an inflation hole for inert gas inflation. An inflation valve is installed at the inflation hole position. The inner cavity of the cylinder body is designed as a vacuum cavity.

[0006] The aforementioned skeleton oil seal has a skeleton made of stainless steel and an internal oil seal lip made of a fluorosilicone blend wear-resistant elastic material.

[0007] The aforementioned skeleton oil seal is configured with three layers, and the spacer design is installed on the inner side of the first skeleton oil seal, which is closer to the outer side.

[0008] The packing material is made of graphite braided material.

[0009] The spacer is a wear-resistant copper spacer.

[0010] The housing is a stainless steel sealed housing.

[0011] The cap is a copper cap.

[0012] The stirring paddle shaft passes through the pressure cap and is mounted on the outside of the cylinder body via a bearing support.

[0013] The utility model discloses a design is ingenious, and the structure is reasonable compact, and the sealing effect is good, durable, can effectively prevent the leakage of extremely small powder, reduces the wear and tear of material to the journal position, increases the service life, improves the vacuum degree in the cylinder, promotes the product quality, and has great help to the quality promotion of material. BRIEF DESCRIPTION OF DRAWINGS

[0014] Fig. 1 It is the shaft seal mechanism application schematic drawing of the utility model.

[0015] Fig. 2 It is the casing local enlarged schematic drawing of the utility model. CONCRETE IMPLEMENTING

[0016] Referring to the drawings Figs. 1-2 For the shaft seal mechanism of the pinching machine stirring paddle shaft 1 to extremely small powder material, the pinching machine stirring paddle shaft 1 is installed on the side plate 2 of the cylinder body of the pinching machine through the shaft seal mechanism, and the shaft seal mechanism includes a casing 3, a gland 4, a skeleton oil seal 5, a spacer sleeve 6 and a packing 7, the casing 3 includes a sleeve main body 31, an inner connecting flange 32, an annular positioning step 33, an inner annular boss 34 and an outer connecting flange 35, the inner side end of the sleeve main body 31 is designed with the annular positioning step 33 protruding axially, the outer circumferential surface of the sleeve main body 31 is provided with the inner connecting flange 32 close to the inner side end, the outer circumferential surface of the sleeve main body 31 is provided with the outer connecting flange 35 close to the end, and the inner hole of the sleeve main body 31 is provided with the inner annular boss 34 protruding radially close to the middle position; The side plate 2 of the cylinder body is provided with a round hole for installing the stirring paddle shaft 1, and the outer side opening of the round hole is designed with an annular groove; After the stirring paddle shaft 1 penetrates through the round hole, the sleeve main body 31 is sleeved on the outer side of the stirring paddle shaft 1, the sleeve main body 31 is installed in the annular groove through the annular positioning step 33, and the sleeve main body 31 is installed on the outer side of the side plate 2 of the cylinder body through the inner connecting flange 32, the packing 7 and the skeleton oil seal 5 are installed between the sleeve main body 31 and the stirring paddle shaft 1, the packing 7 is installed on the outer side of the inner annular boss 34, the gland 4 is also sleeved on the outer side of the stirring paddle shaft 1, the inner side of the gland 4 is designed with an axial pressing table, the gland 4 is connected with the outer connecting flange 35 of the casing 3, the axial pressing table of the gland 4 is extruded on the outer side of the packing 7, the inner side of the packing 7 is extruded on the outer side of the inner annular boss 34, the skeleton oil seal 5 is designed with multiple rows, the skeleton oil seal 5 is installed on the inner side of the inner annular boss 34, the spacer sleeve 6 is installed between the multiple rows of skeleton oil seals 5, the outer side of the multiple rows of skeleton oil seals 5 is extruded on the inner side of the inner annular table, and the inner side of the multiple rows of skeleton oil seals 5 is extruded on the bottom of the annular groove, the spacer sleeve 6 is installed on the sleeve main body 31, and the sleeve main body 31 is provided with a gas filling hole 36 for filling inert gas, and the gas filling valve is installed on the position of the gas filling hole 36; The inner cavity of the cylinder body is designed as a vacuumized inner cavity.

[0017] The skeleton oil seal 5 is made of stainless steel, and the inner oil seal lip is made of fluorosilicone blended wear-resistant elastic material.

[0018] The skeleton oil seal 5 is arranged in three rows, and the spacer sleeve 6 is arranged at the inner side of the first row of skeleton oil seals 5 close to the outer side.

[0019] The filler 7 is a graphite woven filler 7.

[0020] The spacer sleeve 6 is a wear-resistant copper spacer sleeve 6.

[0021] The shell 3 is a stainless steel sealing shell 3.

[0022] The gland 4 is a copper gland 4.

[0023] The stirring paddle shaft 1 is installed outside the cylinder through the bearing support seat 8 after passing through the gland 4.

[0024] In use, the stirring paddle shaft passes through the round hole, and two rows of skeleton oil seals are slidably mounted on the stirring paddle shaft, and then the spacer sleeve is sleeved on the stirring paddle shaft, and the outermost row of skeleton oil seals is slidably sleeved on the stirring paddle shaft, and then the shell is sleeved on the outer side of the stirring paddle shaft, and the skeleton oil seal and the spacer sleeve are tightly sealed, the shell is installed in the annular groove outside the side plate through the annular positioning step, and the shell is fixed to the side plate outside the cylinder through the inner connecting flange; then the filler is filled between the shell and the stirring paddle shaft, the shell is sleeved on the outer side of the stirring paddle shaft through the gland, the gland is fixedly connected with the shell, and the gland tightly fills the filler through the axial pressing table, and the inner side of the filler is supported by the inner annular boss; the part of the stirring paddle shaft extending out of the gland is installed on the rack outside the cylinder through the bearing support seat, and then the spacer sleeve position is filled with inert gas through the inflation device from the inflation hole position, and the cylinder is vacuumized during work; the leakage of extremely small powder can be effectively prevented, the wear of the shaft journal position by the material is reduced, the service life is increased, the vacuum degree in the cylinder is improved, the product quality is improved, and the quality of the material is greatly improved.

Claims

1. A shaft seal mechanism for extremely fine powder materials for a kneader agitator shaft, the kneader agitator shaft being installed on the kneader cylinder's side plate by the shaft seal mechanism, characterized in that, The shaft sealing mechanism comprises a shell, a gland, a skeleton oil seal, a spacer and a packing, the shell comprises a sleeve body, an inner connecting flange, an annular positioning step, an inner annular boss and an outer connecting flange, the inner side end of the sleeve body is designed with an axially protruding annular positioning step, the outer circumferential surface of the sleeve body is provided with the inner connecting flange near the inner side end, the outer circumferential surface of the sleeve body is provided with the outer connecting flange near the end, and the inner hole of the sleeve body is provided with a radially protruding inner annular boss near the middle position; the side plate of the cylinder body is provided with a circular hole for installing the stirring paddle shaft, and the outer side opening of the circular hole is designed with an annular groove; after the stirring paddle shaft penetrates through the circular hole, the sleeve body is sleeved outside the stirring paddle shaft, the sleeve body is installed in the annular groove through the annular positioning step, and the sleeve body is installed outside the side plate of the cylinder body through the inner connecting flange; the packing and the skeleton oil seal are installed between the sleeve body and the stirring paddle shaft, the packing is installed outside the inner annular boss, the gland is also sleeved outside the stirring paddle shaft, the inner side of the gland is designed with an axial pressing table, the gland is connected with the outer connecting flange of the shell, the axial pressing table of the gland is extruded outside the packing, the inner side of the packing is extruded outside the inner annular boss, the skeleton oil seal is designed with multiple channels, the skeleton oil seal is installed inside the inner annular boss, the spacer is installed between the multiple skeleton oil seals, the outer side of the multiple skeleton oil seals is extruded inside the inner annular boss, the inner side of the multiple skeleton oil seals is extruded at the bottom of the annular groove, the spacer is installed at the position corresponding to the sleeve body, the upper surface of the sleeve body is provided with an inflation hole for inflating inert gas, and the inflation hole is provided with an inflation valve; the inner cavity of the cylinder body is designed as a vacuumized inner cavity.

2. A shaft seal mechanism for extremely fine powder materials for a kneader paddle shaft as claimed in claim 1, characterized by, The skeleton oil seal is made of stainless steel, and the inner oil seal lip is made of fluorosilicone blended wear-resistant elastic material.

3. A shaft seal mechanism for extremely fine powder materials for a kneader paddle shaft as claimed in claim 1, wherein, The skeleton oil seal is provided with three channels, and the spacer is designed to be installed at the inner side position of the first channel of the skeleton oil seal.

4. A shaft seal mechanism for extremely fine powder materials for a mixing paddle shaft of a kneader according to claim 1, characterized by, The packing is made of graphite woven packing.

5. A shaft seal mechanism for extremely fine powder materials for a mixing paddle shaft of a kneader according to claim 1, characterized by, The spacer is a wear-resistant copper spacer.

6. A shaft seal mechanism for extremely fine powder materials for a mixing paddle shaft of a kneader according to claim 1, characterized by, The shell is a stainless steel sealing shell.

7. A shaft seal mechanism for extremely fine powder materials for a mixing paddle shaft of a kneader according to claim 1, characterized by, The gland is a copper gland.

8. A shaft seal mechanism for extremely fine powder materials for a mixing paddle shaft of a kneader according to claim 1, characterized by, The stirring paddle shaft is installed outside the cylinder body through the bearing support seat after penetrating through the gland.

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