CN217121658U - Improved structure of heat-resistant steel volute riser pressure nest - Google Patents
Improved structure of heat-resistant steel volute riser pressure nest Download PDFInfo
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- CN217121658U CN217121658U CN202220668491.7U CN202220668491U CN217121658U CN 217121658 U CN217121658 U CN 217121658U CN 202220668491 U CN202220668491 U CN 202220668491U CN 217121658 U CN217121658 U CN 217121658U
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Abstract
The utility model provides a heat-resistant steel spiral case rising head pressure nest improves structure belongs to heat-resistant steel spiral case casting technical field. Improved structure of heat-resistant steel spiral case riser pressure nest, including the air flue casing, be provided with the air flue bolt on the air flue casing, be provided with the riser on the air flue bolt, the riser comprises riser neck, first riser portion, second riser portion top middle part is provided with the pressure nest, the pressure nest is the triangular prism form. The improvement of the dead head structure effectively eliminates the shrinkage porosity problem generated at the root of the air passage bolt.
Description
Technical Field
The utility model belongs to the technical field of heat-resistant steel spiral case casting, concretely relates to heat-resistant steel spiral case rising head pressure nest improves structure.
Background
In the development process of a material forming process, casting is the longest process in history, and compared with other part forming processes, the casting forming process has the characteristics of low production cost, high process flexibility, no limitation of the size of a part and the complexity of a shape structure and the like. The mass of the cast product can be from several grams to hundreds of tons, and the wall thickness can be from 0.3mm to more than 1 m. Modern casting technology occupies an important position in modern mass production. The cast part accounts for 40-80% of the total mass in a common machine, but the manufacturing cost only accounts for 25-30% of the total cost of the machine.
The whole appearance and the inner cavity of the volute are in a spiral streamline design. The function of the compressor is to suck the fluid into the compressor and convert the kinetic energy of the fluid into pressure in the process of discharge, thereby realizing the pressure balance of the whole compressor. The volute must have a wall thickness to withstand the pressure and its inner cavity surface must be smooth and free of protrusions to avoid turbulence. Because of the special structure of the volute product and the high requirements on the quality of the volute product, the production and the forming of the volute product are generally realized by a casting technology.
In the production of volute products by casting techniques, shrinkage porosity is a common phenomenon in the casting process. The forming principle of shrinkage porosity is an alloy with wide crystallization temperature interval, the temperature gradient inside and outside a casting is small in the solidification process, the boundary between solid and liquid phases is not obvious, dendritic crystals are developed in the crystallization process, liquid is divided into small areas which are not communicated with each other, so that external molten metal cannot be fed, and fine holes are generated among the dendritic crystals and in the dendritic crystals, namely the shrinkage porosity. The shrinkage porosity phenomenon often occurs at the place where the wall thickness of the casting is large or the wall thickness change is obvious because the shrinkage cannot be timely fed. The strategies adopted in the industry for solving the shrinkage porosity are generally sequential solidification, reasonable determination of the position of an ingate and reasonable application of riser, chilling block and other technological measures.
The volute air passage of the partial volute product is provided with the air passage bolt, when the volute air passage is cast, metal liquid flows to the air passage bolt, and the root of the air passage bolt cannot be effectively fed due to the fact that the thickness of the metal liquid changes suddenly, so that shrinkage porosity is often formed at the root of the air passage bolt, and the overall performance and quality of the volute product are affected.
The publication No. CN204867311U discloses an atmospheric pressure riser for casting, and the publication No. CN109648045A discloses a ventilation sand core assembly of the atmospheric pressure riser of a heat-resistant stainless steel turbine shell, wherein risers arranged in the two documents are all universal atmospheric pressure risers without considering the problem of shrinkage porosity generated when the wall thickness of a casting is suddenly changed. The utility model discloses the shrinkage porosity problem that produces to outstanding air flue bolt root on the air flue casing has improved the structure of heat-resistant steel spiral case rising head pressure nest to spiral case air flue bolt root shrinkage porosity problem has finally been solved.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that, to prior art not enough, provide a heat-resistant steel spiral case rising head pressure nest and improve structure to solve the unable effective feeding to air flue bolt root of the metal liquid in the rising head among the current structure, thereby the problem of shrinkage porosity appears at air flue bolt root.
In order to solve the technical problem, the utility model discloses the technical scheme who adopts is:
improved structure of heat-resistant steel spiral case riser pressure nest, including the air flue casing, be provided with the air flue bolt on the air flue casing, be provided with the riser on the air flue bolt, the riser comprises riser neck, first riser portion, second riser portion top middle part is provided with the pressure nest, the pressure nest is the triangular prism form.
Furthermore, the length of the pressure nest is 15-18 mm, the width of the pressure nest is 11-20 mm, and the height of the pressure nest is 8-10 mm.
Furthermore, the pressure socket penetrates through the second riser part and is connected with the first riser part.
Further, the riser neck is arranged on the side wall of the air flue bolt.
Furthermore, the length of the riser is 42-44mm, the sum of the widths of the first riser part and the second riser part is 46-50mm, and the height of the riser is 74-78 mm.
Further, the longitudinal section area of the first riser part gradually increases along the direction away from the air passage shell.
Furthermore, the longitudinal section area of the second riser part gradually decreases along the direction far away from the air passage shell.
Compared with the prior art, the beneficial effects of the utility model are as follows:
the utility model discloses to spiral case air flue bolt root shrinkage porosity problem, set up the rising head at air flue bolt lateral wall. The riser comprises a riser neck, a first riser part and a second riser part. The riser neck is arranged on the side wall of the air passage bolt, so that the subsequent reprocessing process is facilitated, and the problem of cracks caused by stress concentration is avoided as much as possible; the first dead head part is obliquely arranged, and the area of the longitudinal section of the first dead head part is gradually increased along the direction far away from the air flue shell, so that the design is favorable for effectively feeding the root part of the air flue bolt by molten metal under the self-gravity condition; the second rising head top sets up the pressure nest, the pressure nest is the triangular prism form, the pressure nest link up the second and burst the portion and meet with first burst portion, pressure nest length is 15 ~ 18mm, and the width is 11 ~ 20mm, highly is 8 ~ 10mm just the second bursts the longitudinal section area of oral area along keeping away from air flue casing direction degressive gradually, enlarges the improvement through length, width and the height with the pressure nest to the feeding for the rising head provides appropriate pressure support, is favorable to effectively feeding air flue bolt root, and finally solves the shrinkage porosity problem that air flue bolt root appears.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings.
FIG. 1: and the overall structure schematic diagram of the riser after the pressure nest of the heat-resistant steel volute riser is improved.
FIG. 2: the length of the pressure nest after the pressure nest of the heat-resistant steel volute feeder is improved is shown schematically.
FIG. 3: the width of the pressure nest after the pressure nest of the heat-resistant steel volute feeder is improved is shown schematically.
FIG. 4: and the height of the pressure nest after the pressure nest of the heat-resistant steel volute feeder is improved is shown.
FIG. 5: the length and height of the riser after the pressure nest of the heat-resistant steel volute riser is improved are shown schematically.
FIG. 6: and (3) a riser width schematic diagram after the pressure nest of the refractory steel volute riser is improved.
FIG. 7: and the side overall structure schematic diagram of the improved heat-resistant steel volute feeder pressure nest.
The air channel bolt is 1, the second riser part is 2, the air channel shell is 3, the pressure nest is 4, the first riser part is 5, the riser neck is 6, and the riser is 7.
Detailed Description
For a better understanding of the present invention, the contents of the present invention will be further clarified below by referring to examples, but the present invention is not limited to the following examples. In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art, that the present invention may be practiced without one or more of these specific details.
Example 1
Referring to fig. 1-7, the improved structure of the refractory steel volute riser pressure nest: including air flue casing 3, be provided with air flue bolt 1 on the air flue casing 3, be provided with rising head 7 on the air flue bolt 1, rising head 7 is the slope form and sets up 1 lateral wall of air flue bolt, rising head 7 comprises riser neck 6, first riser portion 5, second riser portion 2, the height of rising head 7 is 76.2mm, the width sum of first riser portion 5 and second riser portion 2 is 49mm, the length of rising head 7 is 43.6 mm. The air flue shell is characterized in that the longitudinal section area of the first riser part 5 gradually increases along the direction of being far away from the air flue shell 3, the longitudinal section area of the second riser part 2 gradually decreases along the direction of being far away from the air flue shell 3, the middle part of the top end of the second riser part 2 is provided with a pressure socket 4, the length of the pressure socket 4 is 17.5mm, the width of the pressure socket is 19.3mm, and the height of the pressure socket is 8.2 mm. The root of the air passage bolt cast by the dead head pressure nest structure has no shrinkage porosity.
Referring to fig. 7, the riser neck 6 is arranged on the side wall of the air passage bolt 1, so that on one hand, the problem of cracks generated at the root of the air passage bolt 1 due to over-concentrated stress can be avoided as much as possible, and on the other hand, the riser neck is also beneficial to the expansion of the subsequent processing technology; the first overflow opening part 5 is obliquely arranged, the area of the longitudinal section of the first overflow opening part is gradually increased along the direction far away from the air flue shell 3, the design is favorable for effectively feeding the root of the air flue bolt 1 by molten metal under the action of self gravity, the total volume of the first overflow opening part 5 and the second overflow opening part 2 is large and is about 116574.71mm3, and sufficient molten metal can be provided for feeding the root of the air flue bolt; the middle part of the top end of the second overflow opening part 2 is provided with a pressure socket 4, the pressure socket 4 penetrates through the second overflow opening part 2 to be connected with the first overflow opening part 5, and the length, the width and the height of the pressure socket 4 are respectively enlarged by 3.2mm, 9.1mm and 1mm before improvement. The longitudinal section area of second cap portion 2 diminishes gradually along keeping away from 3 directions of air flue casing, improves through the optimization to pressure nest 4 and second cap portion 2 for the metal liquid produces suitable pressure in second cap portion 2 during the casting, thereby carries out the feeding more effectively to 1 root of air flue bolt, and finally solves the shrinkage porosity problem of air flue bolt root.
Finally, the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and other modifications or equivalent replacements made by the technical solutions of the present invention by those of ordinary skill in the art should be covered within the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solutions of the present invention.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. Improved structure of heat-resistant steel volute riser pressure nest, its characterized in that: including the air flue casing, be provided with the air flue bolt on the air flue casing, be provided with the rising head on the air flue bolt, the rising head comprises riser neck, first riser portion, second riser portion top middle part is provided with the pressure nest, the pressure nest is the triangular prism form.
2. The improved structure of the heat-resistant steel volute riser pressure socket as defined in claim 1, wherein: the length of the pressure nest is 15-18 mm, the width of the pressure nest is 11-20 mm, and the height of the pressure nest is 8-10 mm.
3. The improved structure of the pressure nest of the heat-resistant steel volute feeder according to claim 1, characterized in that: the pressure socket penetrates through the second cap part and is connected with the first cap part.
4. The improved structure of the pressure nest of the heat-resistant steel volute feeder according to claim 1, characterized in that: the riser neck is arranged on the side wall of the air duct bolt.
5. The improved structure of the pressure nest of the heat-resistant steel volute feeder according to claim 1, characterized in that: the height of the riser is 74-78mm, the length of the riser is 42-44mm, and the sum of the widths of the first riser part and the second riser part is 46-50 mm.
6. The improved structure of the pressure nest of the heat-resistant steel volute feeder according to claim 1, characterized in that: the longitudinal section area of the first riser part gradually increases along the direction far away from the air passage shell.
7. The improved structure of the pressure nest of the heat-resistant steel volute feeder according to claim 1, characterized in that: the longitudinal section area of the second riser part is gradually decreased along the direction far away from the air passage shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220668491.7U CN217121658U (en) | 2022-03-24 | 2022-03-24 | Improved structure of heat-resistant steel volute riser pressure nest |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220668491.7U CN217121658U (en) | 2022-03-24 | 2022-03-24 | Improved structure of heat-resistant steel volute riser pressure nest |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217121658U true CN217121658U (en) | 2022-08-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220668491.7U Active CN217121658U (en) | 2022-03-24 | 2022-03-24 | Improved structure of heat-resistant steel volute riser pressure nest |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217121658U (en) |
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2022
- 2022-03-24 CN CN202220668491.7U patent/CN217121658U/en active Active
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