CN212286542U - High-temperature ultra-long span large-torque screw shaft - Google Patents
High-temperature ultra-long span large-torque screw shaft Download PDFInfo
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- CN212286542U CN212286542U CN202020111405.3U CN202020111405U CN212286542U CN 212286542 U CN212286542 U CN 212286542U CN 202020111405 U CN202020111405 U CN 202020111405U CN 212286542 U CN212286542 U CN 212286542U
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Abstract
The utility model provides a high temperature overlength span large-torque screw axis and processing method thereof, the main content of the technical scheme of adoption is as follows. A high-temperature ultra-long span large-torque screw shaft comprises a solid shaft head, a hollow shaft, a helical blade and a hollow shaft head. Wherein, solid spindle nose sets up the one end at the hollow shaft, and solid spindle nose and hollow shaft threaded connection. The hollow shaft head is arranged at the other end of the hollow shaft and is in threaded connection with the hollow shaft. The helical blade is welded on the outer side of the hollow shaft. The invention also provides a processing method of the high-temperature overlong-span large-torque screw shaft, which comprises the following steps of: 1) pre-treating; 2) rough machining; 3) welding; 4) straightening; 5) fine processing; 6) and (5) grinding the shaft. The high-temperature ultra-long span large-torque screw shaft provided by the invention has the advantages of high temperature resistance, high strength, high wear resistance and good machining precision.
Description
Technical Field
The utility model belongs to the technical field of the screw axis processing, concretely relates to high temperature overlength span big moment of torsion screw axis.
Background
The large-scale spiral agitated vessel is a common apparatus in the engineering, is used for the conveyor of water conservancy, cement and domestic waste mostly, and wherein the screw axis is the key component, and the shaft material adopts ordinary carbon steel more, and current spiral processing scheme is: selecting a solid bar as a raw material, carrying out fine machining on the whole hardened and tempered material on a lathe, and finally welding the blade. The proposal is a feasible proposal for a small normal temperature conveying device, but for a screw shaft with the middle span of more than 10 meters under the high temperature environment, the prior technical processing proposal has the following defects:
1) the screw shaft is a solid shaft, so that the weight of the shaft is too large, the length of the shaft is more than 10 meters, the cost is too high, the deflection of the shaft is increased, and a large jumping amount can be generated during processing and equipment operation, so that the later equipment operation is not facilitated.
2) In the pyrolysis reactor, a shaft head is connected with a driving mechanism, the torque is as high as 30 ten thousand N.m, the middle working temperature of a shaft is above 900 ℃, if the whole shaft is made of carbon steel, the shaft head part can not bear large torque to break, and the shaft can bend and deform when the middle temperature of the shaft is above 500 ℃.
3) The processing sequence of finishing the two ends of the shaft and then welding the blades on the shaft can lead the processed shaft to deform when the blades are welded, thus reducing the overall processing precision of the shaft and increasing the rejection rate.
The utility model provides a screw axis amount of deflection that the method can solve prior art existence is big, the wearability is poor, intensity is poor, and the machining precision is low and the shortcoming that the rejection rate is high.
Disclosure of Invention
The utility model mainly aims at providing a high temperature resistant, high strength, high abrasion, machining precision are better, and the diameter is more than 650mm, and length is more than 13m, and the bearing span is the rotation screw axis more than 10m and processing method thereof.
The utility model adopts the technical proposal that:
a high-temperature-resistant rotary screw shaft comprises a solid shaft head, a hollow shaft, a screw blade and a hollow shaft head. Wherein, solid spindle nose sets up the one end at the hollow shaft, and solid spindle nose and hollow shaft threaded connection. The hollow shaft head is arranged at the other end of the hollow shaft and is in threaded connection with the hollow shaft. The helical blade is welded on the outer side of the hollow shaft. The solid shaft head is a part for connecting the high-temperature screw shaft and the driving end, and needs to be precisely matched with a coupler, a mechanical seal and a bearing, the surface smoothness requirement is as high as 1.6 mu m, and finish machining is needed. The hollow shaft head needs to be provided with a bearing and a mechanical seal, the surface roughness height of the matching part is required to be up to 1.6 mu m, and the hollow pipe is mainly welded with propeller blades, so that the requirement on the surface roughness is lower.
The solid spindle nose is made of alloy steel (40 Cr). The alloy steel comprises the following chemical components in percentage by mass: 0.37-0.44 percent of C, 0.17-0.37 percent of Si, 0.50-0.80 percent of Mn, 0.80-1.10 percent of Cr, less than or equal to 0.30 percent of Ni, less than or equal to 0.030 percent of P, less than or equal to 0.030 percent of S, less than or equal to 0.30 percent of Cu, less than or equal to 0.10 percent of Mo, and the balance of Fe.
The hollow shaft is made of 310s stainless steel. The stainless steel comprises the following chemical components in percentage by mass: c is less than or equal to 0.08, Si is less than or equal to 1.500, Mn is less than or equal to 2.00, P is less than or equal to 0.035, S is less than or equal to 0.030, Ni is less than or equal to 19.00-22.00, Cr is less than or equal to 24.00-26.0, and the balance is Fe.
Before the screw shaft is transported to a project site for use, a plurality of tools are uniformly arranged below the horizontally arranged high-temperature ultra-long span large-torque screw shaft for multi-point support, so that the horizontally arranged deformation is prevented.
Wherein the heating temperature in the pretreatment in the step 1) is 600-630 ℃, the annealing treatment is carried out by normally and slowly reducing the temperature to the normal temperature in the air, and the rapid acid cleaning is carried out by using HCl with the concentration of 200g/L at the temperature of 80-85 ℃, so as to ensure that the oxide on the surface of the machined part is washed away.
The utility model discloses a show the effect and lie in:
1) the spiral shaft has low part processing cost, 40Cr is selected as a shaft head material, and 310s is selected as a middle hollow shaft material, so that the material cost is greatly reduced; 2) the shaft performance is better, 40Cr is used as a shaft head, the strength is more than 4 times of that of common carbon steel, 310s is used as a middle shaft material and can resist the high temperature of more than 1000 ℃, hard alloy is welded on a blade shaft, the hardness of the blade reaches 70HRC, and the high-temperature ultra-long span large-torque screw shaft of the screw shaft has the characteristics of high temperature resistance, high strength and high wear resistance; 3) the rejection rate is low: the adjusting and processing procedure comprises pretreatment, rough machining, welding, straightening, finish machining and shaft grinding, the risk of shaft deformation caused by welding is eliminated by a method of welding a propeller blade, straightening the shaft and finish machining, and meanwhile, when the shaft is finish machined on a lathe, two adjustable sliding supports with three-point positioning are adopted to ensure that the shaft cannot generate deflection during machining and the accuracy of finish machining is ensured; when the spiral shaft is stored in a storehouse, the shaft is ensured not to deform in the storage and transportation process by adopting the multi-point support of the tool, and the spiral shaft is ensured not to generate permanent deflection.
Drawings
FIG. 1 is a front view of a high temperature ultra-long span high torque screw shaft;
in the figure: 1 is a solid shaft head; 2 is a hollow shaft; 3 is a helical blade; 4 is a hollow shaft head; 5 is a supporting position I; and 6 is a support position II.
Fig. 2 is a support member.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
As shown in figure 1, the utility model provides a high temperature overlength span large torque screw axis.
The utility model provides a technical scheme as follows:
a high-temperature ultra-long span large-torque screw shaft comprises a solid shaft head 1, a hollow shaft 2, a helical blade 3 and a hollow shaft head 4. Wherein, solid axle head 1 sets up the one end at hollow shaft 2, and solid axle head 1 and hollow shaft 2 threaded connection. The hollow shaft head 4 is arranged at the other end of the hollow shaft 2, and the hollow shaft head 4 is in threaded connection with the hollow shaft 2. The helical blades 3 are welded to the outside of the hollow shaft 2.
And a supporting position I5 and a supporting position II 6 are respectively arranged on two sides of the hollow shaft 2.
The solid spindle head 1 is made of alloy steel (40 Cr). The alloy steel comprises the following chemical components in percentage by mass: 0.37-0.44 percent of C, 0.17-0.37 percent of Si, 0.50-0.80 percent of Mn, 0.80-1.10 percent of Cr, less than or equal to 0.30 percent of Ni, less than or equal to 0.030 percent of P, less than or equal to 0.030 percent of S, less than or equal to 0.30 percent of Cu, less than or equal to 0.10 percent of Mo, and the balance of Fe.
The hollow shaft 2 is made of 310s stainless steel. The stainless steel comprises the following chemical components in percentage by mass: c is less than or equal to 0.08, Si is less than or equal to 1.500, Mn is less than or equal to 2.00, P is less than or equal to 0.035, S is less than or equal to 0.030, Ni is less than or equal to 19.00-22.00, Cr is less than or equal to 24.00-26.00, and the balance is Fe.
Before the screw shaft is transported to a project site for use, the processed high-temperature overlong-span large-torque screw shaft is uniformly supported at multiple points by five same tools, so that the screw shaft is ensured not to deform after being placed for a long time.
Claims (6)
1. A high-temperature overlong-span large-torque screw shaft is characterized in that: including solid spindle nose (1), hollow shaft (2), helical blade (3) and hollow spindle nose (4), solid spindle nose (1) sets up the one end at hollow shaft (2), and hollow spindle nose (4) set up the other end at hollow shaft (2), and helical blade (3) welding is in the outside of hollow shaft (2).
2. The high temperature ultra-long span high torque screw shaft of claim 1, wherein: the solid shaft head (1) is in threaded connection with the hollow shaft (2).
3. The high temperature ultra-long span high torque screw shaft of claim 1, wherein: the hollow shaft head (4) is in threaded connection with the hollow shaft (2).
4. The high temperature ultra-long span high torque screw shaft of claim 1, wherein: the solid shaft head (1) is made of alloy steel (40 Cr).
5. The high temperature ultra-long span high torque screw shaft of claim 1, wherein: the hollow shaft (2) is made of 310s stainless steel.
6. The high temperature ultra-long span high torque screw shaft of claim 1, wherein: the solid shaft head (1) is in threaded connection with the hollow shaft (2); the hollow shaft head (4) is in threaded connection with the hollow shaft (2); the solid shaft head (1) is made of alloy steel (40 Cr); the hollow shaft (2) is made of 310s stainless steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020111405.3U CN212286542U (en) | 2020-01-17 | 2020-01-17 | High-temperature ultra-long span large-torque screw shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020111405.3U CN212286542U (en) | 2020-01-17 | 2020-01-17 | High-temperature ultra-long span large-torque screw shaft |
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| Publication Number | Publication Date |
|---|---|
| CN212286542U true CN212286542U (en) | 2021-01-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020111405.3U Active CN212286542U (en) | 2020-01-17 | 2020-01-17 | High-temperature ultra-long span large-torque screw shaft |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113001123A (en) * | 2021-03-17 | 2021-06-22 | 中冶重工（唐山）有限公司 | Manufacturing method of stranding cage shaft based on combination of hollow shaft and solid shaft |
-
2020
- 2020-01-17 CN CN202020111405.3U patent/CN212286542U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113001123A (en) * | 2021-03-17 | 2021-06-22 | 中冶重工（唐山）有限公司 | Manufacturing method of stranding cage shaft based on combination of hollow shaft and solid shaft |
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