CN219055260U - Small-gap sealing structure of screw extrusion granulator shafting - Google Patents
Small-gap sealing structure of screw extrusion granulator shafting Download PDFInfo
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- CN219055260U CN219055260U CN202223528246.5U CN202223528246U CN219055260U CN 219055260 U CN219055260 U CN 219055260U CN 202223528246 U CN202223528246 U CN 202223528246U CN 219055260 U CN219055260 U CN 219055260U
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Abstract
The utility model discloses a small gap sealing structure of a screw extrusion granulator shafting, and belongs to the technical field of screw extrusion devices. The novel screw thread sealing device comprises a main shaft, a template, a screw rod, a barrel, a transparent cover and an inter-shaft seal, wherein the main shaft drives the screw rod to rotate in the barrel, the template is arranged at one end of the screw rod, which is far away from the main shaft, the inter-shaft seal and the transparent cover are arranged in front of the inter-shaft seal, the inter-shaft seal is arranged on the main shaft and rotates along with the main shaft, the inter-shaft seal comprises a pushing thread inner sleeve and a pushing thread outer sleeve, the pushing thread outer sleeve is detachably arranged on the pushing thread inner sleeve, the pushing thread inner sleeve is arranged on the main shaft, and external threads are arranged on the outer surface of the pushing thread outer sleeve. Through providing a little clearance seal structure of screw extrusion granulator shafting, by barrel, the seal structure that is covered and this seal forms realize keeping off a large amount of leakage materials in this sealed department thoroughly to alleviate the load of rear end interaxial seal, extension shaft end sealed life-span.
Description
Technical Field
The utility model relates to a small gap sealing structure of a screw extrusion granulator shafting, and belongs to the technical field of screw extrusion devices.
Background
The screw extrusion granulator belongs to one of the powder material forming devices, and the screw extruder depends on the pressure and the shearing force generated by the rotation of the screw, so that the materials can be fully compressed and pushed, and the materials are extruded and formed through a machine head template, and the screw extruder can be basically classified into a double screw extruder, a single screw extruder, a few multi-screw extruders and the like.
A clearance fit is typically used between the extruder barrel and the screw, but because the material is reacted by the die plate of the extruder, there is some intermittent counter-movement of the material between the screw and the barrel (relative to the discharge end of the pelletizer), and thus an inter-shaft seal is provided between the extruder screw spindle and the barrel gland, typically in the form of a combined skeletal and packing seal.
Because the cylinder body and the penetrating cover are static parts, the screw rod and the shaft system (including the main shaft) are rotating parts, intermittent coordination is realized among the cylinder body, the penetrating cover and the shaft system, the intermittent coordination is larger to achieve millimeter level (1 millimeter to a few millimeters, specific data are related to the outer diameter of the shaft system, the rotating speed of the main shaft and the like) in consideration of the degree of coiling of the shaft system and the swinging during rotation, so that materials are in an actual non-defense state among the cylinder body, the penetrating cover and the shaft system, directly enter an inter-shaft seal, and after powder materials enter the inter-shaft seal, the powder materials are easy to cause seal damage and lose efficacy, and the materials leak from between a static sealing element and the rotating main shaft.
The existing extruder has single inter-shaft sealing structure, directly faces leakage materials, increases the load of inter-shaft sealing, and shortens the service life of the inter-shaft sealing.
Disclosure of Invention
The technical problems to be solved by the utility model are as follows: the utility model provides a little clearance seal structure of screw extrusion granulator shafting, it has solved among the prior art seal structure between the extruder barrel and has had single structure, sealed effect poor and installation stability poor, can't satisfy the problem of user demand.
The technical problems to be solved by the utility model are realized by adopting the following technical scheme:
the small gap sealing structure of the screw extrusion granulator shafting comprises a main shaft, a template, a screw, a barrel, a transparent cover and an inter-shaft seal, wherein the main shaft drives the screw to rotate in the barrel, the template is arranged at one end of the screw far away from the main shaft;
the seal comprises a pushing thread inner sleeve and a pushing thread outer sleeve, wherein the pushing thread outer sleeve is detachably arranged on the pushing thread inner sleeve, the pushing thread inner sleeve is arranged on the main shaft, and an external thread is arranged on the outer surface of the pushing thread outer sleeve.
The seal consists of a pushing thread inner sleeve and a pushing thread outer sleeve which are arranged on a main shaft, wherein the pushing thread outer sleeve is formed by adopting nonmetallic material for finish machining, and an outer circle is machined into a small-pitch thread which is in the same direction with the rotating speed of the main shaft so as to push leakage materials to a discharge end, and a small gap seal is added before the shaft of the extruder is sealed, so that the first seal and most leakage materials are sealed.
As a preferable example, an inner sleeve and an outer sleeve fixing screw are arranged between the pushing thread inner sleeve and the pushing thread outer sleeve, and the pushing thread inner sleeve and the pushing thread outer sleeve are connected together through the inner sleeve fixing screw and the outer sleeve fixing screw.
The pushing thread outer sleeve is sleeved on the pushing thread inner sleeve, and the inner sleeve and the outer sleeve fixing screws penetrate through the pushing thread outer sleeve along the radial direction of the inner sleeve and the outer sleeve so as to connect and fix the inner sleeve and the outer sleeve together.
As a preferred example, the number of the inner and outer set screws is plural.
The number of the fixing screws of the inner sleeve and the outer sleeve is four.
As a preferred example, the pushing thread jacket comprises two semicircular rings.
The pushing thread sleeve is processed into two semicircular rings, and the two semicircular rings do not need to be taken down along the axial direction of the main shaft during replacement, and only the inner sleeve and the outer sleeve fixing screws are taken down and taken down for replacement after being taken down in half.
As a preferable example, the pushing thread jacket is made of nonmetallic materials.
The pushing thread jacket is formed by adopting metal material through finish machining, and is arranged on the main shaft through a metal key and rotates along with the main shaft.
As a preferred example, the pushing thread inner sleeve is connected with a main shaft key.
The beneficial effects of the utility model are as follows:
1. the sealing structure formed by the cylinder body, the transparent cover and the sealing structure is used for realizing the blocking of a large amount of leakage materials at the sealing position, thereby reducing the load of the rear end shaft sealing and prolonging the service life of the shaft end sealing.
2. The sealing jacket is made of nonmetal, so that the problems of equipment failure and material pollution caused by friction scraps due to hard friction easily caused by poor sealing effect when a gap between a shafting and a cylinder body is large and the intermittent time are avoided.
3. The combination mode of quick disassembly and assembly of the metal inner sleeve and the nonmetal outer sleeve is adopted, so that the service life of the sealing inner sleeve is prolonged, the sealing replacement process is simplified, and the maintenance time and the workload are greatly saved.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the present utility model;
FIG. 2 is a schematic cross-sectional view of the present seal;
fig. 3 is a schematic structural view of the inner and outer jacket fixing screws.
In the figure: 1. a main shaft; 2. a template; 3. a screw; 4. a cylinder; 41. a feed inlet; 42. a discharge port; 5. sealing; 51. pushing a threaded inner sleeve; 52. pushing a threaded jacket; 53. the inner sleeve and the outer sleeve are provided with fixed screws; 6. a transparent cover; 7. and sealing between shafts.
Detailed Description
The utility model will be further described with reference to the following detailed drawings, in order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the utility model easy to understand.
As shown in figure 1, the small gap sealing structure of the screw extrusion granulator shafting comprises a main shaft 1, a template 2, a screw 3 and a cylinder 4.
The cylinder 4 is provided with a feed inlet 41 and a discharge outlet 42, the feed inlet 41 is arranged at the upper end of the cylinder 4, the discharge outlet 42 is arranged at one end of the cylinder 4 far away from the main shaft 1, the discharge outlet 42 is provided with a template 2, and the screw 3 is arranged in the cylinder 4.
One end of the cylinder 4, which is close to the main shaft 1, is provided with a seal 5, a transparent cover 6 and an inter-shaft seal 7, and the seal 5 is arranged on one side of the transparent cover 6, which is opposite to the inter-shaft seal 7. The main shaft 1 drives the screw 3 to rotate in the cylinder 4, and the seal 5 is arranged on the main shaft 1 and rotates along with the main shaft 1.
As shown in fig. 1-3, the present seal 5 includes a pushing thread inner sleeve 51 and a pushing thread outer sleeve 52, an inner and outer sleeve fixing screw 53 is disposed between the pushing thread inner sleeve 51 and the pushing thread outer sleeve 52, and the pushing thread inner sleeve 51 and the pushing thread outer sleeve 52 are screwed together by four inner and outer sleeve fixing screws 53.
The pushing thread inner sleeve 51 is arranged on the main shaft 1, the pushing thread inner sleeve 51 is formed by adopting metal material for finish machining, and the pushing thread inner sleeve 51 is connected with the main shaft 1 in a key way.
The keyed connection is the circumferential fixation between the shaft and the parts on the shaft by means of keys to transfer motion and torque. Some of these types may also achieve axial fixation and transfer of axial forces, and some types may also achieve axial dynamic coupling.
In a keyed assembly, a key (typically made of 45 steel) is a mechanical component used to connect and circumferentially secure parts on a shaft to achieve torque transfer. The connection types include loose key connection, general key connection and tight key connection.
The pushing thread sleeve 52 is formed by adopting nonmetallic material for finish machining, the outer circle of the pushing thread sleeve 52 is machined into small-pitch threads in the same direction with the rotating speed of the main shaft 1 so as to push the leakage material to the discharge end, a small gap seal is added before the inter-shaft seal 7 of the extruder, and the first seal and most of the leakage material are sealed.
The pushing thread outer sleeve 52 is sleeved on the pushing thread inner sleeve 51, and the inner sleeve and outer sleeve fixing screws 53 penetrate along the radial direction of the inner sleeve and outer sleeve so as to connect and fix the inner sleeve and the outer sleeve together.
The pushing thread sleeve 52 comprises two semicircular rings, the pushing thread sleeve 52 is processed into two semicircular rings, and the pushing thread sleeve 52 does not need to be taken down along the axial direction of the main shaft 1 during replacement, but only needs to be taken down and replaced by disassembling the inner and outer sleeve fixing screws 53 in half after disassembling the inner and outer sleeve fixing screws 53.
The foregoing describes in detail preferred embodiments of the present utility model. It should be understood that numerous modifications and variations can be made in accordance with the concepts of the utility model by one of ordinary skill in the art without undue burden. Therefore, all technical solutions which can be obtained by logic analysis, reasoning or limited experiments based on the prior art by the person skilled in the art according to the inventive concept shall be within the scope of protection defined by the claims.
Claims (6)
1. The utility model provides a little clearance seal structure of screw extrusion granulator shafting, includes main shaft (1), template (2), screw rod (3), barrel (4), lid (6) and interaxial seal (7) are thoroughly covered, and main shaft (1) drive screw rod (3) rotate in barrel (4), and template (2) set up in the one end that main shaft (1) was kept away from to screw rod (3), a serial communication port, be provided with this seal (5) before lid (6) are thoroughly covered in interaxial seal (7), this seal (5) set up on main shaft (1) along with main shaft (1) rotation together;
the seal (5) comprises a pushing thread inner sleeve (51) and a pushing thread outer sleeve (52), the pushing thread outer sleeve (52) is detachably arranged on the pushing thread inner sleeve (51), the pushing thread inner sleeve (51) is arranged on the main shaft (1), and external threads are arranged on the outer surface of the pushing thread outer sleeve (52).
2. The small gap sealing structure of the screw extrusion granulator shafting according to claim 1, wherein an inner and outer sleeve fixing screw (53) is arranged between the pushing thread inner sleeve (51) and the pushing thread outer sleeve (52), and the pushing thread inner sleeve (51) and the pushing thread outer sleeve (52) are connected together through the inner and outer sleeve fixing screw (53).
3. The small gap sealing structure of the screw extrusion granulator shafting according to claim 2, characterized in that the number of the inner and outer sleeve fixing screws (53) is plural.
4. The small clearance seal structure of a screw extrusion pelletizer shaft system as claimed in claim 1, wherein said push screw jacket (52) includes two semicircular rings.
5. The small gap seal structure of a screw extrusion granulator shaft system according to claim 4, wherein the pushing screw jacket (52) is made of a nonmetallic material.
6. The small gap sealing structure of the screw extrusion granulator shafting according to claim 1, characterized in that the pushing thread inner sleeve (51) is in key connection with the main shaft (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223528246.5U CN219055260U (en) | 2022-12-28 | 2022-12-28 | Small-gap sealing structure of screw extrusion granulator shafting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223528246.5U CN219055260U (en) | 2022-12-28 | 2022-12-28 | Small-gap sealing structure of screw extrusion granulator shafting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219055260U true CN219055260U (en) | 2023-05-23 |
Family
ID=86347754
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223528246.5U Active CN219055260U (en) | 2022-12-28 | 2022-12-28 | Small-gap sealing structure of screw extrusion granulator shafting |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219055260U (en) |
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2022
- 2022-12-28 CN CN202223528246.5U patent/CN219055260U/en active Active
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