CN210175812U - Variable-pitch screw shaft for aluminum liquid transmission - Google Patents
Variable-pitch screw shaft for aluminum liquid transmission Download PDFInfo
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- CN210175812U CN210175812U CN201920719840.1U CN201920719840U CN210175812U CN 210175812 U CN210175812 U CN 210175812U CN 201920719840 U CN201920719840 U CN 201920719840U CN 210175812 U CN210175812 U CN 210175812U
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Abstract
The utility model provides a variable pitch screw axis is transmitted to aluminium liquid, variable pitch screw axis includes screw axis 1, helical blade 2, and the geometry key element is helical blade diameter phiD, screw axis diameter phid, helical blade front end pitch Pi, helical blade rear end pitch Pi and helical blade thickness S, helix lead angle β, helical blade medial margin helix lead angle α, phiD =130mm, phid =40mm, Pi =200mm, PII =300mm, S =20mm, α =87 °, β =100 °, the screw axis adopts silicon nitride ceramic combined material preparation shaping, non-stick melting, to aluminium liquid transportation pollution-free, carry out the machine tooling after the sintering again, helical blade adopts the variable pitch structure, helical blade front end pitch is less than helical blade rear end pitch, and the slip plane of aluminium liquid changes and discharges impurity in the aluminium liquid, the transmission of aluminium liquid with higher speed is suitable for using as aluminium liquid transmission.
Description
Technical Field
The utility model relates to a spiral transmission of aluminium liquid especially relates to the spiral axle of aluminium liquid transmission.
Background
At present, the transportation of the aluminum liquid adopts a transportation casting ladle for transportation, the aluminum liquid in a smelting furnace is guided into the transportation casting ladle in the process, the transportation casting ladle is transported by a forklift, then the aluminum liquid is poured into a final die to manufacture a product, and the process has the defects of loss of the temperature of the aluminum liquid, pollution of unknown impurities in the air to the aluminum liquid in the transportation process, cost generated by personnel and equipment in the transportation process and the like.
The material conveying device is characterized in that a horizontal screw conveyor transmission mode is usually adopted for omitting a transfer ladle, a main component of the horizontal screw conveyor transmission mode is a screw shaft, when the screw shaft of the machine is started to rotate, materials are subjected to the action of normal thrust of screw blades and axially move along a material groove under the action of axial component force of the normal thrust of the blades, and therefore the materials are conveyed. At present, most of spiral shafts in the market are made of cold rolled steel, the material has no problem in the transportation of common materials, but the transportation of high-purity aluminum liquid can pollute the purity of aluminum liquid, and the spiral shafts are easy to deform at high temperature and have short service life. Due to poor toughness of ceramic materials, the machining process is difficult, and for complex parts such as the screw shaft, fracture is easy to occur in the machining process, and the angle and the pitch of the screw blade are ensured. Therefore, no ceramic screw shaft exists in the market at present. The ceramic material can meet the use requirement of conveying the aluminum liquid, and the purity of the aluminum liquid cannot be polluted, so that the high-purity aluminum liquid power screw shaft is hard to develop, and has important significance.
Disclosure of Invention
In order to solve the problem that the aluminum liquid is polluted and the purity of the aluminum liquid is influenced in the aluminum liquid transportation process, the utility model provides an aluminum liquid transmission variable pitch screw shaft. The screw shaft is manufactured and molded by adopting a silicon nitride ceramic composite material, the aluminum liquid is conveyed from one end of the conveyor to the other end by the variable-pitch helical blades at a lower rotating speed, the sintered ceramic has high hardness, does not stick molten aluminum, has no pollution to aluminum liquid transportation, and solves the technical problem of influencing the purity in the aluminum liquid transportation.
The utility model provides a scheme that technical problem adopted is:
the variable-pitch screw shaft comprises a screw shaft 1 and screw blades 2, and the geometric elements comprise a screw blade diameter phi D, a screw shaft diameter phi D, a screw blade front end pitch Pi, a screw blade rear end pitch Pi and a screw blade thickness S, a helix angle β and a helix angle α at the inner edge of each screw blade;
phid =130mm, phid =40mm, pi =200mm, pii =300mm, S =20mm, α =87 °, β =100 °;
the spiral shaft is made of a silicon nitride ceramic composite material.
The positive effect, because the utility model adopts the silicon nitride ceramic composite material for manufacturing and molding, the molten aluminum liquid is not stuck, and the transportation of the aluminum liquid is not polluted; and machining is carried out after sintering, the spiral blade adopts a variable-pitch structure, the pitch of the front end of the spiral blade is smaller than that of the rear end of the spiral blade, the sliding surface of the aluminum liquid is changed, impurities in the aluminum liquid are discharged, and the transmission of the aluminum liquid is accelerated. The spiral conveying shaft is suitable for being used as an aluminum liquid conveying spiral shaft.
Drawings
Fig. 1 is a sectional view of the structure of the present invention.
In the figure, 1 is a screw shaft, 2 is a screw blade, phi D is the diameter of the screw blade, phi d is the diameter of the screw shaft, Pi is the pitch of the front end of the screw blade, Pi is the pitch of the rear end of the screw blade, S is the thickness of the screw blade, β is the lead angle, α is the lead angle of the inner edge of the screw blade.
Detailed Description
As shown in the figure, the variable-pitch screw shaft comprises a screw shaft 1 and a screw blade 2, and the geometrical form factors comprise a screw blade diameter phi D, a screw shaft diameter phi D, a screw pitch Pi at the front end of the screw blade, a screw pitch Pi at the rear end of the screw blade and a screw blade thickness S, a helix angle β and a helix angle α at the inner edge of the screw blade;
phid =130mm, phid =40mm, pi =200mm, pii =300mm, S =20mm, α =87 °, β =100 °.
The spiral shaft is made of a silicon nitride ceramic composite material.
The utility model discloses a theory of operation:
the high-purity aluminum liquid has high requirements on tools, is extremely easy to pollute in the transportation process, omits the continuous transmission of a transfer casting ladle screw shaft structure, can realize the transportation, loading and unloading of the high-purity aluminum liquid, can finish the technological operations of mixing, stirring, heating and the like in the transportation process according to the actual requirements, and realizes the transportation of high-temperature materials. The spiral shaft has simple and durable structure, small and compact volume, is completely sealed, can ensure dustproof and sealed design, does not lose the heat of the aluminum liquid, realizes closed conveying and reduces the pollution of the environment to the aluminum liquid.
The nominal diameter phid of the screw blade is an important parameter of the horizontal screw conveyor and is directly related to the throughput and the structural dimensions of the screw conveyor. If the mass transfer Q is known, the nominal diameter phid of the helical blade is pre-calculated according to a formula, and then checking calculation can be performed after other parameters are determined.
The screw pitch S determines the magnitude of a helix angle β, the magnitude of the helix angle directly influences the component force of an aluminum block in the conveying process, and directly influences the conveying state of aluminum in the conveying process.
The shaft neck diameter phid of the screw shaft and the pitch of the screw shaft jointly determine the magnitude of the helix angle α at the inner edge of the screw blade, the size of the shaft neck is related to the pitch of the screw, and the magnitude of the shaft neck is also related to the slip direction and the velocity distribution of the material, so that a reasonable shaft neck diameter phid is determined in relation to the pitch of the screw, and the reasonable shaft neck and pitch relation is determined in consideration of (1) the frictional relationship of the helical surface and the aluminum material, and (2) the proper distribution of the velocity component.
The utility model has the advantages that:
the screw shaft is made of a silicon nitride ceramic composite material, so that the high-purity aluminum liquid is free from pollution, high-temperature resistant and non-stick to molten aluminum liquid, and the problem that the high-purity aluminum liquid is easy to pollute in the transportation process is solved.
Claims (2)
1. The aluminum liquid transmission variable-pitch screw shaft is characterized by comprising a screw shaft (1) and helical blades (2), wherein the geometric form factors comprise a helical blade diameter phi D, a screw shaft diameter phi D, a helical blade front end pitch Pi, a helical blade rear end pitch PII, a helical blade thickness S, a helix angle β and a helix angle α at the inner edge of the helical blade;
phid =130mm, phid =40mm, pi =200mm, pii =300mm, S =20mm, α =87 °, β =100 °.
2. The aluminum liquid conveying variable-pitch screw shaft as claimed in claim 1, which is characterized in that: the spiral shaft is made of a silicon nitride ceramic composite material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920719840.1U CN210175812U (en) | 2019-05-20 | 2019-05-20 | Variable-pitch screw shaft for aluminum liquid transmission |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920719840.1U CN210175812U (en) | 2019-05-20 | 2019-05-20 | Variable-pitch screw shaft for aluminum liquid transmission |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210175812U true CN210175812U (en) | 2020-03-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920719840.1U Active CN210175812U (en) | 2019-05-20 | 2019-05-20 | Variable-pitch screw shaft for aluminum liquid transmission |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210175812U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110127305A (en) * | 2019-05-20 | 2019-08-16 | 江苏新伊菲科技有限公司 | A kind of molten aluminum transmission variable-pitch auger axis |
-
2019
- 2019-05-20 CN CN201920719840.1U patent/CN210175812U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110127305A (en) * | 2019-05-20 | 2019-08-16 | 江苏新伊菲科技有限公司 | A kind of molten aluminum transmission variable-pitch auger axis |
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