Labyrinth seal transmission main shaft assembly for powder material mixing equipment

Abstract

The utility model relates to the technical field of powder material mixing equipment, in particular to a labyrinth seal transmission main shaft assembly for powder material mixing equipment, which comprises a transmission main shaft connected with a fixed flange at the end part of a charging barrel and penetrating through the charging barrel; the bearing assembly is arranged on the periphery of the transmission main shaft in a sleeving mode and connected with the fixing flange, a sealing cavity is formed in the side, close to the fixing flange, of the bearing assembly, and the side, not provided with the sealing cavity, of the bearing assembly is covered with a bearing cover; the sealing assembly is arranged in the sealing cavity and connected with the fixing flange in a pressing mode, and the sealing assembly comprises a packing, a first static sealing ring, a movable sealing ring and a second static sealing ring. The device is relatively simple in structure, few in parts and easy to maintain; and a labyrinth seal formed by the packing, the first static sealing ring, the movable sealing ring and the second static sealing ring can greatly reduce dust and impurities in the charging barrel from entering the bearing, so that the service life of the bearing is prolonged, and the smoothness of mechanical transmission work is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of powder material mixing equipment, in particular to a labyrinth seal drive main shaft assembly for powder material mixing equipment. Background Art

[0002] In the mechanical drive of existing powder material mixing equipment, the drive main shaft is usually matched with a pair of bearings, and corresponding spacer sleeves or connecting seats are installed on the bearing surfaces. However, in this structure, the bearings are exposed outside the fixed flange of the barrel, which usually causes dust and impurities inside the barrel to enter the bearings or their connection positions, resulting in a reduced service life of the bearings or a situation where the drive work gets stuck. Summary of the Utility Model

[0003] The purpose of the utility model is to solve the defects existing in the prior art, and provide a labyrinth seal drive main shaft assembly for powder material mixing equipment, including:

[0004] A drive main shaft, which is connected to the fixed flange at the end of the barrel and penetrates through the barrel;

[0005] A bearing assembly, sleeved on the periphery of the drive main shaft and connected to the fixed flange. A seal cavity is provided on one side of the bearing assembly close to the fixed flange, and a bearing cover is sleeved on the side of the bearing assembly without a seal cavity;

[0006] A seal assembly, configured in the seal cavity and tightly connected to the fixed flange. The seal assembly includes packing, a first static seal ring, a dynamic seal ring, and a second static seal ring.

[0007] Further, the bearing assembly includes a bearing sleeve, a bearing, a stop washer, and a round nut that are sequentially sleeved on the periphery of the drive main shaft;

[0008] The bearing sleeve is connected to the fixed flange by a first bolt.

[0009] Further, a first seal groove is provided at one end of the fixed flange that is not connected to the barrel; a second seal groove is provided on the side of the bearing sleeve close to the fixed flange, and the first seal groove and the second seal groove form the seal cavity.

[0010] Further, the packing is arranged in the seal groove; one side of the first static seal ring close to the fixed flange is placed in the first seal groove, and the other side is placed in the second seal groove; the second static seal ring is placed in the second seal groove, and the dynamic seal ring is arranged in the dynamic seal ring accommodation gap between the first static seal ring and the second static seal ring.

[0011] Further, the sealing assembly is connected to the fixed flange through a second bolt, and the second bolt passes through the second static seal ring and the first static seal ring and is connected to the fixed flange.

[0012] Further, a discharge hole is provided on the bearing sleeve, and the discharge hole communicates the sealing cavity with the outside.

[0013] Further, the bearing cover and the bearing sleeve are fixedly connected through a third bolt.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0015] The sealing assembly of the labyrinth seal drive main shaft assembly for a powder material mixing device of the present utility model includes packing, a first static seal ring, a dynamic seal ring, and a second static seal ring. The structure is relatively simple, with fewer parts and easy maintenance. Moreover, the labyrinth seal formed by the packing, the first static seal ring, the dynamic seal ring, and the second static seal ring can greatly reduce the entry of dust and impurities inside the barrel into the bearing, thereby improving the service life of the bearing and enhancing the smoothness of mechanical transmission work. Description of the Drawings

[0016] The drawings are used to provide a further understanding of the present utility model and constitute a part of the specification. Together with the embodiments of the present utility model, they are used to explain the present utility model and do not constitute a limitation to the present utility model. In the drawings:

[0017] Figure 1 is a schematic structural diagram of a labyrinth seal drive main shaft assembly for a powder material mixing device of the present utility model.

[0018] Reference Signs

[0019] 1: Drive main shaft;

[0020] 2: Barrel;

[0021] 3: Fixed flange;

[0022] 4: Bearing assembly;

[0023] 41: Bearing sleeve; 42: Bearing; 43: Lock washer; 44: Round nut;

[0024] 5: Sealing cavity;

[0025] 6: Bearing cover;

[0026] 7: Sealing assembly;

[0027] 71: Packing; 72: First static seal ring; 73: Dynamic seal ring; 74: Second static seal ring. Detailed Embodiments

[0028] In order to make the objectives, technical solutions, and advantages of the present utility model clearer and more understandable, the present utility model will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0029] Embodiment 1

[0030] Please refer to Figure 1 , the technical solution of a labyrinth seal drive main shaft assembly for a powder material mixing device provided in this embodiment is as follows:

[0031] A drive main shaft 1, which is connected to a fixed flange 3 at the end of a material cylinder 2 and penetrates through the material cylinder 2;

[0032] A bearing assembly 4, sleeved on the periphery of the drive main shaft 1 and connected to the fixed flange 3. A sealing cavity 5 is provided on one side of the bearing assembly 4 close to the fixed flange 3, and a bearing cover 6 is sleeved on the side of the bearing assembly 4 without the sealing cavity 5;

[0033] A sealing assembly 7, configured in the sealing cavity 5 and tightly connected to the fixed flange 3. The sealing assembly 7 includes packing 71, a first static seal ring 72, a dynamic seal ring 73, and a second static seal ring 74.

[0034] Specifically, the bearing assembly 4 includes a bearing sleeve 41, a bearing 42, a stop washer 43, and a round nut 44 that are sequentially sleeved on the periphery of the drive main shaft 1;

[0035] The bearing sleeve 41 is connected to the fixed flange 3 by a first bolt.

[0036] Preferably, since in the prior art the bearing 42 is exposed outside the fixed flange 3 of the material cylinder 2, it usually causes dust and impurities inside the material cylinder 2 to enter the bearing 42 or its connection position. Therefore, in essence, this design adds a sealing assembly 7 between the bearing 42 and the material cylinder 2 to achieve a certain degree of dust barrier.

[0037] Specifically, one end of the fixed flange 3 not connected to the material cylinder 2 is provided with a first sealing groove; one side of the bearing sleeve 41 close to the fixed flange 3 is provided with a second sealing groove, and the first sealing groove and the second sealing groove form the sealing cavity 5.

[0038] Specifically, the packing 71 is arranged in the sealing groove; one side of the first static seal ring 72 close to the fixed flange 3 is placed in the first sealing groove, and the other side is placed in the second sealing groove; the second static seal ring 74 is placed in the second sealing groove, and the dynamic seal ring 73 is arranged in the dynamic seal ring accommodation gap between the first static seal ring 72 and the second static seal ring 74.

[0039] Preferably, the first static seal ring 72, the dynamic seal ring 73 and the second static seal ring 74 cooperate with each other to form a plurality of annular seal teeth arranged in sequence around the transmission main shaft 1. A series of throttling gaps and expansion cavities are formed between the teeth. When the medium to be sealed passes through the gaps of the zigzag labyrinth, a throttling effect is generated to achieve the purpose of leakage prevention.

[0040] Specifically, the seal assembly 7 is connected to the fixed flange 3 through a second bolt. The second bolt passes through the second static seal ring 74 and the first static seal ring 72 and is connected to the fixed flange 3.

[0041] Specifically, a discharge hole is provided on the bearing sleeve 41, and the discharge hole communicates the seal cavity 5 with the outside.

[0042] Specifically, the bearing cover 6 and the bearing sleeve 41 are fixedly connected through a third bolt.

[0043] Preferably, the installation steps of the present device are as follows: In the first step, install the barrel 2, the transmission main shaft 1, and the fixed flange 3. In the second step, install the packing 71, the first static seal ring 72, the dynamic seal ring 73, and the second static seal ring 74 in sequence. Pass the second bolt through the second static seal ring 74 and the first static seal ring 72 to the fixed flange 3 to compress the packing 71, the first static seal ring 72, the dynamic seal ring 73, and the second static seal ring 74. In the third step, install the bearing sleeve 41 and fix the bearing sleeve 41 on the fixed flange 3 with a first bolt. In the fourth step, install the bearing 42, the stop washer 43, and the round nut 44. In the fifth step, install the third bolt to fix the bearing cover 6 on the bearing sleeve 41.

[0044] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A labyrinth seal transmission spindle assembly for a powder material mixing device, characterized in that: include: A transmission main shaft connected to a fixed flange at the end of the barrel and passing through the barrel; A bearing assembly is sleeved on the periphery of the transmission main shaft and connected to the fixed flange. A sealing cavity is provided on the side of the bearing assembly close to the fixed flange, and a bearing cover is provided on the side of the bearing assembly not provided with the sealing cavity; The sealing assembly is arranged in the sealing cavity and is tightly connected with the fixed flange. The sealing assembly comprises a packing, a first static sealing ring, a dynamic sealing ring and a second static sealing ring.

2. The labyrinth seal transmission spindle assembly for powder material mixing equipment according to claim 1, characterized in that: The bearing assembly comprises a bearing sleeve, a bearing, a stop washer and a round nut which are sequentially sleeved on the periphery of the transmission main shaft; The bearing sleeve is connected to the fixing flange via a first bolt.

3. The labyrinth seal transmission spindle assembly for powder material mixing equipment according to claim 2, characterized in that: A first sealing groove is provided at the end of the fixed flange that is not connected to the barrel; a second sealing groove is provided at the side of the bearing sleeve close to the fixed flange, and the first sealing groove and the second sealing groove form the sealing cavity.

4. The labyrinth seal transmission spindle assembly for powder material mixing equipment according to claim 3, characterized in that: The packing is arranged in the sealing groove; the first static sealing ring is placed in the first sealing groove on one side close to the fixed flange, and the other side is placed in the second sealing groove; the second static sealing ring is placed in the second sealing groove, and the dynamic sealing ring is arranged in the dynamic sealing ring accommodating gap between the first static sealing ring and the second static sealing ring.

5. The labyrinth seal transmission spindle assembly for powder material mixing equipment according to claim 1, characterized in that: The sealing assembly is connected to the fixed flange via a second bolt, and the second bolt passes through the second static sealing ring and the first static sealing ring and is connected to the fixed flange.

6. The labyrinth seal transmission spindle assembly for powder material mixing equipment according to claim 2, characterized in that: The bearing sleeve is provided with a discharge hole, and the discharge hole is connected with the sealing cavity and the outside.

7. The labyrinth seal transmission spindle assembly for powder material mixing equipment according to claim 2, characterized in that: The bearing cover and the bearing sleeve are fixedly connected by a third bolt.

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