Lip seal structure for granulator

Abstract

A lip seal structure for a granulator comprises a main shaft, a gear box and a lip seal assembly. The lip seal assembly comprises a lip seal framework, an outer lip seal, a containing groove and an inner lip seal. The lip seal framework comprises a framework body, an assembling groove and a clamping piece. The outer lip seal comprises an outer lip seal body and a sealing ring outer lip edge. The inner lip seal comprises an inner lip seal body and a sealing ring inner lip edge. One end of the outer lip edge of the sealing ring abuts against the outer side wall of the gear box, and the inner lip edge of the sealing ring abuts against the side wall of the main shaft, so that dust is prevented from entering the gear box. According to the lip seal structure for the granulator, dust is prevented from entering the gear box, the sealing effect is improved, and the service life of the gear box is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of granulator equipment, in particular to a lip seal structure used for a granulator. Background Art

[0002] Granulators are widely used in industries such as pharmaceuticals, food, and fine chemicals. Existing cone-type granulators typically consist of a frame, a feed hopper, a granulation mechanism, and a gearbox. The gearbox is a key component in the granulator, primarily responsible for transmitting and converting power. It contains multiple gears, bearings, and other transmission components, which interact to drive the various parts of the granulator.

[0003] However, the granulator generates a large amount of dust during the processing of raw materials. This dust may enter the gearbox through the gaps in the gearbox and mix with the grease to form sludge. The sludge not only reduces the lubricating effect of the grease, but also accelerates the wear of the internal components of the gearbox, shortening the service life of the gearbox. Utility Model Content

[0004] In view of this, the utility model provides a lip seal structure for a granulator that increases the life of a gear box to meet industrial needs.

[0005] A lip seal structure for a pelletizing machine includes a main shaft inserted into a feed hopper, a gearbox disposed at the end of the main shaft facing away from the feed hopper, and a lip seal assembly fixedly connected to the main shaft and disposed between the feed hopper and the gearbox. The lip seal assembly includes a lip seal frame disposed on the main shaft, an outer lip seal disposed on the lip seal frame, a receiving groove disposed at the end of the gearbox facing the lip seal frame, and an inner lip seal disposed at one end of the gearbox. The lip seal frame includes a frame body disposed on the main shaft, an assembly groove disposed at the end of the frame body facing the gearbox, and a clamping member disposed within the assembly groove. The outer lip seal includes an outer lip seal body disposed on the clamping member and an outer lip of a sealing ring disposed on the outer lip seal body. The inner lip seal includes an inner lip seal body accommodated in the receiving groove and an inner lip of a sealing ring disposed on the inner lip seal body. One end of the outer lip of the sealing ring abuts against the outer side wall of the gear box, and the inner lip of the sealing ring abuts against the side wall of the main shaft to prevent dust from entering the gear box.

[0006] Furthermore, the lip seal frame further includes at least one sealing ring arranged at an end of the frame body facing away from the gear box.

[0007] Furthermore, the outer lip seal and the inner lip seal are arranged concentrically, and the minimum inner diameter of the outer lip seal is greater than the maximum diameter of the inner lip seal.

[0008] Furthermore, the inner lip seal further includes a groove provided on the inner side wall of the inner lip seal body.

[0009] Furthermore, the inner lip seal body is accommodated in the accommodating groove, and the outer diameter of the inner lip seal body is the same as the diameter of the accommodating groove.

[0010] Furthermore, the clamping member includes a clamping member body and a mounting groove provided on the clamping member body.

[0011] Furthermore, the outer lip seal body is accommodated in the mounting groove, and in the cross section along the central axis of the clip, the outer contour of the clip body is "L"-shaped, and the outer diameter of the outer lip seal body is equal to the diameter of the mounting groove.

[0012] Furthermore, the outer lip edge of the sealing ring is inclined away from one end of the lip seal frame, and the inner lip edge of the sealing ring is inclined toward one end of the lip seal frame.

[0013] Furthermore, the outer lip seal and the inner lip seal are both made of rubber.

[0014] Compared to the prior art, the lip seal structure for a pelletizing machine provided by the present invention protects the gearbox through a lip seal assembly disposed on the gearbox. The lip seal assembly includes a lip seal frame disposed on the main shaft, an outer lip seal disposed on the lip seal frame, a receiving groove disposed on the end of the gearbox facing the lip seal frame, and an inner lip seal disposed at one end of the gearbox. The lip seal frame includes an assembly groove on the end of the frame body facing the gearbox, and a snap-fit member disposed within the assembly groove. The outer lip seal body of the outer lip seal is disposed on the snap-fit member, and the outer lip edge of the sealing ring is disposed on the outer lip seal body. The inner lip seal body of the inner lip seal is accommodated in the receiving groove, and the inner lip edge of the sealing ring is disposed on the inner lip seal body. One end of the outer lip of the sealing ring abuts the outer wall of the gearbox, while the inner lip of the sealing ring abuts the side wall of the main shaft. Thus, the outer lip seal seals the outer wall of the gearbox and seals between one end of the gearbox and the main shaft. In other words, the outer and inner lip seals prevent dust from entering the gearbox. This shows that the lip seal structure for the pelletizing machine prevents dust from entering the gearbox, improves the sealing effect, and increases the life of the gearbox. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The utility model is a schematic cross-sectional view of the lip seal structure for a granulator. DETAILED DESCRIPTION

[0016] The following is a further detailed description of specific embodiments of the present invention. It should be understood that the description of the embodiments of the present invention herein is not intended to limit the scope of protection of the present invention.

[0017] like Figure 1 Figure 1 is a schematic diagram of the lip seal structure for a pelletizing machine provided by the present invention. The lip seal structure for a pelletizing machine comprises a main shaft 1 inserted into a feed hopper (not shown), a gearbox 2 disposed at the end of the main shaft 1 facing away from the feed hopper, and a lip seal assembly 10 fixedly connected to the main shaft 1 and disposed between the feed hopper and the gearbox 2. The lip seal structure for a pelletizing machine also includes other functional modules, such as assembly components, which are well known to those skilled in the art and will not be described in detail here.

[0018] One end of the main shaft 1 is connected to the gear box 2, and the other end of the main shaft 1 is disposed in a feed hopper (not shown). Driven by the gear box 2, the main shaft 1 rotates, thereby stirring the material in the feed hopper. The main shaft 1 and the gear box 2 are both prior art and will not be described in detail here.

[0019] The lip seal assembly 10 includes a lip seal frame 11 mounted on the main shaft 1, an outer lip seal 12 mounted on the lip seal frame 11, a receiving groove 13 mounted on the end of the gearbox 2 facing the lip seal frame 11, and an inner lip seal 14 mounted on one end of the gearbox 2. The lip seal assembly 10 is sleeved on the main shaft 1 and disposed between the feed hopper and the gearbox 2. The lip seal assembly 10 is used to prevent dust from entering the gearbox 2. The outer lip seal 12 and the inner lip seal 14 are both made of rubber, allowing them to fit snugly against the gearbox 2 and the main shaft 1.

[0020] The lip seal skeleton 11 includes a skeleton body 111 arranged on the main shaft 1, an assembly groove 112 arranged at the end of the skeleton body 111 facing the gear box 2, a clamping member 113 arranged in the assembly groove 112, and at least one sealing ring 114 arranged at the end of the skeleton body 111 facing away from the gear box 2.

[0021] The skeleton body 111 is arranged on the main shaft 1. In this embodiment, the skeleton body 111 and the main shaft 1 are screwed together. The connection structure between the skeleton body 111 and the main shaft 1 is a prior art and will not be described here.

[0022] The assembly groove 112 is used to accommodate the clamping member 113, and the outer lip seal 12 is disposed on the clamping member 113. The outer lip seal 12 is concentrically disposed with the inner lip seal 14, and the minimum inner diameter of the outer lip seal 12 is greater than the maximum diameter of the inner lip seal 14. That is, the clamping member 113, the outer lip seal 12, and the inner lip seal 14 can all be accommodated within the assembly groove 112, thereby limiting the positions of the outer lip seal 12 and the inner lip seal 14. The outer lip seal 12 seals the lip seal frame 11 and the outer wall of the gearbox 2, and the inner lip seal 14 seals the gearbox 2 and the main shaft 1. In addition, the clamping member 113 and the assembly groove 112 can be threadedly connected or interference fit. The connection structure between the clamping member 113 and the assembly groove 112 is conventional and will not be described in detail here.

[0023] The clamping member 113 includes a clamping member body 1131 and a mounting groove 1132 provided on the clamping member body 1131. The clamping member body 1131 is provided on the frame body 111, and the mounting groove 1132 is used to accommodate the outer lip seal 12 and connect the outer lip seal 12 to the lip seal frame 11.

[0024] The sealing ring 114 is provided between the skeleton body 111 and the feed hopper to ensure the sealing between the skeleton body 111 and the feed hopper. The sealing ring 114 is a prior art and will not be described in detail here.

[0025] The outer lip seal 12 includes an outer lip seal body 121 disposed on the clip 113, and a sealing ring outer lip 122 disposed on the outer lip seal body 121. The outer lip seal body 121 is accommodated in the mounting groove 1132. In a cross section along the central axis of the clip 113, the outer profile of the clip body 1131 is L-shaped. The outer diameter of the outer lip seal body 121 is equal to the diameter of the mounting groove 1132, thereby ensuring a stable position of the outer lip seal 12 on the clip 113.

[0026] The outer lip 122 of the sealing ring is arranged at an angle, and one end of the outer lip 122 of the sealing ring abuts against the outer wall of the gear box 2, so that the outer lip seal 12 seals the outer wall of the gear box 2, that is, the outer lip seal 12 prevents materials from entering the gear box 2.

[0027] The accommodating groove 13 is used to accommodate the inner lip seal 14 to stabilize the position of the inner lip seal 14 . The accommodating groove 13 will be described in detail in conjunction with the inner lip seal 14 .

[0028] The inner lip seal 14 includes an inner lip seal body 141 accommodated in the accommodating groove 13 , a sealing ring inner lip 142 provided on the inner lip seal body 141 , and a groove 143 provided on the inner side wall of the inner lip seal body 141 .

[0029] The inner lip seal body 141 is accommodated in the accommodating groove 13 . The outer diameter of the inner lip seal body 141 is the same as the diameter of the accommodating groove 13 , so that the position of the inner lip seal body 141 in the accommodating groove 13 is stable.

[0030] The inner lip 142 of the sealing ring is set at an angle, and the inner lip 142 of the sealing ring abuts against the side wall of the main shaft 1, thereby achieving sealing between one end of the gear box 2 and the main shaft 1, preventing grease in the gear box 2 from overflowing, and also protecting dust from entering the gear box 2 again.

[0031] The groove 143 is provided on the inner side wall of the inner lip seal body 141, which saves the material of the inner lip seal body 141 and facilitates the inner lip seal body 141 to change its shape. During use, the inner lip edge 142 of the sealing ring can be attached to the side wall of the main shaft 1. The groove 143 is a prior art and will not be described in detail here.

[0032] Compared to the prior art, the lip seal structure for a pelletizing machine provided by the present invention protects the gearbox 2 through a lip seal assembly 10 disposed on the gearbox 2. The lip seal assembly 10 comprises a lip seal frame 11 disposed on the main shaft 1, an outer lip seal 12 disposed on the lip seal frame 11, a receiving groove 13 disposed on the end of the gearbox 2 facing the lip seal frame 11, and an inner lip seal 14 disposed on one end of the gearbox 2. The lip seal frame 11 has an assembly groove 112 on the end of the frame body 111 facing the gearbox 2, and a snap-fit member 113 disposed within the assembly groove 112. An outer lip seal body 121 of the outer lip seal 12 is disposed on the snap-fit member 113, and a sealing ring outer lip 122 is disposed on the outer lip seal body 121. An inner lip seal body 141 of the inner lip seal 14 is accommodated in the receiving groove 3, and a sealing ring inner lip 142 is disposed on the inner lip seal body 141. One end of the sealing ring outer lip 122 abuts the outer wall of the gearbox 2, and the sealing ring inner lip 132 abuts the side wall of the main shaft 1. Thus, the outer lip seal 12 seals the outer wall of the gearbox 2 and the seal between one end of the gearbox 2 and the main shaft 1. That is, the outer lip seal 12 and the inner lip seal 14 prevent dust from entering the gearbox 2. It can be seen from this that the lip seal structure for the granulator prevents dust from entering the gearbox 2, improves the sealing effect, and increases the life of the gearbox 2.

[0033] The above are only preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent replacements or improvements within the spirit of the present invention are included in the scope of the claims of the present invention.

Claims

1. A lip seal structure for a pelletizing machine, comprising a main shaft inserted into a feed hopper, and a gear box disposed at an end of the main shaft facing away from the feed hopper, characterized in that: The lip seal structure for the granulator includes a lip seal assembly fixedly connected to the main shaft and arranged between the feed hopper and the gear box, the lip seal assembly including a lip seal frame provided on the main shaft, an outer lip seal provided on the lip seal frame, a receiving groove provided at one end of the gear box facing the lip seal frame, and an inner lip seal provided at one end of the gear box, the lip seal frame including a frame body provided on the main shaft, an assembly groove provided at one end of the frame body facing the gear box, a clamping piece provided in the assembly groove, the outer lip seal including an outer lip seal body provided on the clamping piece, and an outer lip edge of a sealing ring provided on the outer lip seal body, the inner lip seal including an inner lip seal body received in the receiving groove, an inner lip edge of a sealing ring provided on the inner lip seal body, one end of the outer lip edge of the sealing ring abuts against the outer wall of the gear box, and the inner lip edge of the sealing ring abuts against the side wall of the main shaft to prevent dust from entering the gear box.

2. The lip seal structure for a granulating machine according to claim 1, characterized in that: The lip seal frame further includes at least one sealing ring arranged at an end of the frame body facing away from the gear box.

3. The lip seal structure for a granulating machine according to claim 1, characterized in that: The outer lip seal is concentrically arranged with the inner lip seal, and the minimum inner diameter of the outer lip seal is greater than the maximum diameter of the inner lip seal.

4. The lip seal structure for a granulating machine according to claim 1, characterized in that: The inner lip seal further comprises a groove arranged on the inner side wall of the inner lip seal body.

5. The lip seal structure for a granulating machine according to claim 1, wherein: The inner lip seal body is accommodated in the accommodating groove, and the outer diameter of the inner lip seal body is the same as the diameter of the accommodating groove.

6. The lip seal structure for a granulating machine according to claim 1, wherein: The clamping member includes a clamping member body and a mounting groove arranged on the clamping member body.

7. The lip seal structure for a granulating machine according to claim 6, characterized in that: The outer lip seal body is accommodated in the mounting groove. On the cross section along the central axis of the clip, the outer contour of the clip body is L-shaped. The outer diameter of the outer lip seal body is equal to the diameter of the mounting groove.

8. The lip seal structure for a granulating machine according to claim 1, wherein: The outer lip edge of the sealing ring is inclined away from one end of the lip seal frame, and the inner lip edge of the sealing ring is inclined toward one end of the lip seal frame.

9. The lip seal structure for a granulating machine according to claim 1, wherein: The outer lip seal and the inner lip seal are both made of rubber.

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