CN201808207U - Screw axial and radial double-sealing structure for double-screw machine - Google Patents
Screw axial and radial double-sealing structure for double-screw machine Download PDFInfo
- Publication number
- CN201808207U CN201808207U CN201020537020XU CN201020537020U CN201808207U CN 201808207 U CN201808207 U CN 201808207U CN 201020537020X U CN201020537020X U CN 201020537020XU CN 201020537020 U CN201020537020 U CN 201020537020U CN 201808207 U CN201808207 U CN 201808207U
- Authority
- CN
- China
- Prior art keywords
- screw
- double
- sealing structure
- materials
- radial
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/252—Drive or actuation means; Transmission means; Screw supporting means
- B29C48/2522—Shaft or screw supports, e.g. bearings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/254—Sealing means
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sealing Devices (AREA)
Abstract
The utility model relates to a screw axial and radial double-sealing structure for a double-screw machine. A general single-contact type mechanical sealing structure can cause leakage after being used for a period of time due to processing errors in components of the sealing structure, and safety accidents are easy to be caused when micron-size powdery materials or inflammable and explosive materials with high corrosivity enter a rotation body. An annular groove is arranged on the inner side of a flange, sealing packing is disposed in the groove, and pure polytetrafluoroethylene packing is adopted as filler. The screw axial and radial double-sealing structure realizes double-sealing for inflammable and explosive materials with high corrosivity, leads the materials to be incapable of entering a rotation component along rotation axial and radial directions, effectively avoids safety accidents caused by mechanical friction among the materials and the rotation body, eliminates potential safety hazards, is simple in structure and convenient in use, and is economical and practical.
Description
Technical field
The utility model relates to the dual-screw-stem machine apparatus field, is specifically related to a kind of dual-screw-stem machine screw rod diameter of axle double sealing structure.
Background technology
In dual-screw-stem machine, the screw rod hermetically-sealed construction generally comprises screw shaft, screw, flange and sealing ring, has axis hole on the flange, and axle passes the axis hole on the flange, flange puts by the screw shaft that screw is fixed in dual-screw-stem machine, and sealing ring is arranged on the screw shaft of flange inboard.This single contact mechanical seal structure, exist following problem:, after use a period of time, will produce seepage because there is mismachining tolerance in the parts of hermetically-sealed construction, micron-sized powder material or inflammable, explosive, severe corrosive material enter in the revolving body, easily cause security incident.
Summary of the invention
The purpose of this utility model provides a kind of dual-screw-stem machine screw rod diameter of axle double sealing structure, to solve in the prior art because mismachining tolerance causes micron-sized powder material or inflammable, explosive, severe corrosive material to enter in the revolving body, thereby cause the problem of security incident.
For achieving the above object, technical scheme provided by the utility model is:
A kind of dual-screw-stem machine comprises screw shaft, screw, flange and sealing ring with screw rod diameter of axle double sealing structure, and it is characterized in that: the inboard of described flange is provided with the groove of ring-type, is provided with the airtight and watertight padding layer in groove.
Described airtight and watertight padding layer is the tetrafluoro packing.
With respect to prior art, the utility model has the advantages that:
1, inflammable, explosive, severe corrosive material is adopted double-layer seal, make material not enter pivoting part, effectively avoided the generation mechanical friction of material and revolving body and the security incident that causes, eliminated potential safety hazard along the revolution diameter of axle;
2, this hermetically-sealed construction is simple, and is easy to use, economical and practical.
Description of drawings
Fig. 1 is the utility model structural representation;
Description of reference numerals is as follows:
The 1-screw shaft, 2-screw, 3-flange, 4-sealing ring, 5-airtight and watertight padding layer.
The specific embodiment
Below in conjunction with accompanying drawing the utility model is described in detail.
Referring to Fig. 1, a kind of dual-screw-stem machine comprises screw shaft 1, screw 2, flange 3 and sealing ring 4 with screw rod diameter of axle double sealing structure.Said flange 3 is connected with screw shaft 1, and fixing by screw 2, sealing ring 4 is enclosed within on the screw shaft 1.The inboard of said flange 3 is provided with the groove of ring-type, is provided with airtight and watertight padding layer 5 in groove, and airtight and watertight padding layer 5 is the tetrafluoro packing.
Sealing ring 4 and airtight and watertight padding layer 5 form double sealing structure.
Claims (2)
1. a dual-screw-stem machine is with screw rod diameter of axle double sealing structure, comprise screw shaft (1), screw (2), flange (3) and sealing ring (4), it is characterized in that: the inboard of described flange (3) is provided with the groove of ring-type, is provided with airtight and watertight padding layer (5) in groove.
2. a kind of dual-screw-stem machine according to claim 1 screw rod diameter of axle double sealing structure, it is characterized in that: described airtight and watertight padding layer (5) is the tetrafluoro packing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020537020XU CN201808207U (en) | 2010-09-21 | 2010-09-21 | Screw axial and radial double-sealing structure for double-screw machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020537020XU CN201808207U (en) | 2010-09-21 | 2010-09-21 | Screw axial and radial double-sealing structure for double-screw machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201808207U true CN201808207U (en) | 2011-04-27 |
Family
ID=43891151
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201020537020XU Expired - Fee Related CN201808207U (en) | 2010-09-21 | 2010-09-21 | Screw axial and radial double-sealing structure for double-screw machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201808207U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102305292A (en) * | 2011-06-10 | 2012-01-04 | 张家港市兰航机械有限公司 | Shaft sealing device |
| CN102950741A (en) * | 2011-08-20 | 2013-03-06 | 苏州敏喆机械有限公司 | Screw extruder protective gas sealing device |
-
2010
- 2010-09-21 CN CN201020537020XU patent/CN201808207U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102305292A (en) * | 2011-06-10 | 2012-01-04 | 张家港市兰航机械有限公司 | Shaft sealing device |
| CN102950741A (en) * | 2011-08-20 | 2013-03-06 | 苏州敏喆机械有限公司 | Screw extruder protective gas sealing device |
| CN102950741B (en) * | 2011-08-20 | 2016-02-24 | 苏州敏喆机械有限公司 | A kind of protective gas seal device for screw extruder |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110427 Termination date: 20120921 |