CN210461170U - Compressor casing with built-in spiral plate - Google Patents
Compressor casing with built-in spiral plate Download PDFInfo
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- CN210461170U CN210461170U CN201920975213.4U CN201920975213U CN210461170U CN 210461170 U CN210461170 U CN 210461170U CN 201920975213 U CN201920975213 U CN 201920975213U CN 210461170 U CN210461170 U CN 210461170U
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Abstract
The utility model discloses a compressor casing with a built-in spiral plate, which comprises a casing inner wall (2), a casing bottom plate (3), a casing outer wall (4), an exhaust port (5) and an air inlet (6); the casing bottom plate is fixed with two spiral plates which are sequentially spirally wound in a circumferential space between the inner wall and the outer wall of the casing, namely one spiral plate is spirally installed in a space of 0-180 degrees of the circumference, the other spiral plate is spirally installed in a space of 180-360 degrees of the circumference, and the heights of the ends of the two spiral plates are staggered at the 180-degree position of the circumferential space, so that the two spiral plates respectively extend spirally from the position right above one exhaust port to the other exhaust port, and two reducing flow passages are formed between the inner wall of the casing and the outer wall of the casing. The utility model discloses a flow cross-section that the spiral plate made the casing gradually reduces, reaches the purpose of diffusion, satisfies the flow demand that the air current passes through two exports.
Description
Technical Field
The utility model relates to a compressor housing structure especially relates to a compressor housing of built-in spiral plate.
Background
The advanced machining means of 'casting instead of welding' in the world mechanical manufacturing has been expanded to the field of large centrifugal compressors, and the past mode of consistently adopting cast steel structures and realizing welding mechanisms is changed. The welding structure has the advantages of flexible design, no limitation of a wood mold and a sand box, low cost, high compression strength, smooth surface, attractive appearance, short manufacturing period and the like. And is therefore used in large quantities by compressor manufacturers known in the world.
Because the gas has a large circumferential angle change in the flow channel during the gas flows out of the compressor impeller, the flow rate of the gas at different sections of the casing will be different, so that the traditional welded casing with the uniform section along the circumference cannot adapt to the flow rate well, and the higher the gas velocity is, the lower the efficiency of the casing with the uniform section is, and the more unbalanced the flow rate of the two exhaust ports is. However, the impeller is simple to manufacture and can be subjected to surface machining, so that the impeller is still adopted at present, and the working efficiency of the impeller is greatly influenced.
Disclosure of Invention
An object of the utility model is to provide a compressor casing of built-in spiral plate makes the gradual reducing of circulation cross-section of casing through the spiral plate, reaches the purpose of diffusion, satisfies the flow demand that the air current passes through two exports.
The utility model discloses a realize like this:
a compressor shell with a built-in spiral plate comprises a shell inner wall, a shell bottom plate, a shell outer wall, an exhaust port and an air inlet; the inner wall and the outer wall of the shell are respectively welded on the bottom plate of the shell, and the air inlet, the inner wall and the outer wall of the shell are sequentially arranged from inside to outside; the two exhaust ports are symmetrically arranged on the bottom plate of the shell and are positioned between the inner wall and the outer wall of the shell;
the casing bottom plate is fixed with two spiral plates which are sequentially spirally wound in a circumferential space between the inner wall and the outer wall of the casing, namely one spiral plate is spirally installed in a space of 0-180 degrees of the circumference, the other spiral plate is spirally installed in a space of 180-360 degrees of the circumference, and the heights of the ends of the two spiral plates are staggered at the 180-degree position of the circumferential space, so that the two spiral plates respectively extend spirally from the position right above one exhaust port to the other exhaust port, and two reducing flow passages are formed between the inner wall of the casing and the outer wall of the casing.
The spiral plate is of a semi-circumferential spiral structure, so that the two reducing runners are of a semi-circumferential spiral structure.
The two spiral plates are symmetrically arranged relative to the center of the air inlet.
The outer side ends of the two spiral plates are respectively welded and fixed with the outer wall of the shell, and the inner side ends of the two spiral plates are respectively welded and fixed with the inner wall of the shell.
Compared with the prior art, the utility model, following beneficial effect has:
1. the utility model discloses a flow channel cross-section that the spiral plate structure made air inlet to gas vent changes, and the sectional area of the inside air current of casing changes along circumference to reach the purpose that the air current was collected.
2. The utility model discloses a spiral plate structure makes the air current in the whole spiral case reach the purpose of equalling divide from air inlet to gas vent.
The utility model discloses a form of welding spiral plate makes the circulation cross-section of casing progressively reducing, has solved along the circumference angle difference, the tolerance is different, the different problem of its required flow area, reaches the purpose of diffusion, satisfies the flow demand that the air current passes through two exports.
Drawings
FIG. 1 is a cross-sectional view of a compressor housing with a built-in screw plate according to the present invention;
FIG. 2 is a top view of the compressor housing with a built-in screw plate of the present invention;
fig. 3 is a schematic view of the internal structure of the compressor casing with the built-in spiral plate according to the present invention.
In the figure, 1 spiral plate, 2 inner wall of the casing, 3 bottom plate of the casing, 4 outer wall of the casing, 5 exhaust port and 6 air inlet.
Detailed Description
The invention will be further explained with reference to the drawings and the specific embodiments.
Referring to fig. 1 and 2, a compressor casing with a built-in spiral plate comprises a casing inner wall 2, a casing bottom plate 3, a casing outer wall 4, an exhaust port 5 and an air inlet 6; the inner wall 2 and the outer wall 4 of the shell are respectively welded on the bottom plate 3 of the shell, and the air inlet 6, the inner wall 2 and the outer wall 4 of the shell are sequentially arranged from inside to outside; two air outlets 5 are symmetrically arranged on the bottom plate 3 of the machine shell, and the two air outlets 5 are positioned between the inner wall 2 and the outer wall 4 of the machine shell.
Referring to the attached drawing 3, two spiral plates 1 are welded and fixed on the bottom plate 3 of the casing, the two spiral plates 1 are sequentially spirally wound in a circumferential space between the inner wall 2 of the casing and the outer wall 4 of the casing, that is, one spiral plate 1 is spirally installed in a space of 0 to 180 degrees of the circumference, the other spiral plate 1 is spirally installed in a space of 180 to 360 degrees of the circumference, and the ends of the two spiral plates 1 are arranged in a staggered manner at 180 degrees of the circumferential space, so that the two spiral plates 1 spirally extend from the right top of one exhaust port 5 to the other exhaust port 5, two reducing flow passages are formed between the inner wall 2 of the casing and the outer wall 4 of the casing, and the purpose of pressure expansion of compressed gas is achieved.
The spiral plate 1 is of a semi-circumferential spiral structure, so that the two variable-diameter flow passages are of the semi-circumferential spiral structure, air flow in each semi-circumferential space between the inner wall 2 of the casing and the outer wall 4 of the casing can be discharged through the two exhaust ports 5, and the exhaust values of the two exhaust ports 5 are basically consistent.
The two spiral plates 1 are symmetrically arranged around the center of the air inlet 6.
The outer side ends of the two spiral plates 1 are respectively welded and fixed with the outer wall 4 of the machine shell, and the inner side ends of the two spiral plates 1 are respectively welded and fixed with the inner wall 2 of the machine shell.
The utility model discloses a design, mounting method specifically are:
according to the performance requirement of the compressor, the spiral plate 1 is shaped by three-dimensional software, so that the molded line of the spiral plate can meet the change requirement of the section of the exhaust runner, namely the section of the exhaust volute is kept consistent or close to the design value due to the height change of the spiral plate 1 in the shell; and welding and fixing the bottom end of the shaped spiral plate 1 on a bottom plate 3 of the machine shell, confirming whether the top end height of the spiral plate 1 is consistent with the modeling design height, and respectively welding and fixing the inner side end and the outer side end of the spiral plate 1 on the inner wall 2 of the machine shell and the outer wall 4 of the machine shell after confirming consistency. Finally, an inner cavity of the shell is formed, and the welded shell is basically consistent with the design form of the drawing.
The height of the spiral plate 1 is 380mm, the thread pitch is 760mm, the inclination angle is 120.96mm/rad, and the radial width of the spiral plate 1 is 500 mm. One of the spiral plates 1 is installed at a position of 0 DEG to 180 DEG, and the flow area is 0 at 0 DEG and 0.182m at 180 DEG2At 0 deg. the gas flow is close to 0m3H, the gas flow is about 27000m at 180 DEG3H; the other spiral plate 1 is arranged at a position of 180-360 degrees, the flow area is 0 at 180 degrees and 0.182m at 360 degrees2Gas flow rate close to 0m at 180 DEG3H, the gas flow is about 27000m at 360 DEG3The exhaust values of the two exhaust ports 5 are equivalent.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and should not be taken as limiting the scope of the present invention, therefore, any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention should be included in the scope of the present invention.
Claims (4)
1. A compressor shell with a built-in spiral plate comprises a shell inner wall (2), a shell bottom plate (3), a shell outer wall (4), an exhaust port (5) and an air inlet (6); the inner wall (2) and the outer wall (4) of the shell are respectively welded on the bottom plate (3) of the shell, and the air inlet (6), the inner wall (2) and the outer wall (4) of the shell are sequentially arranged from inside to outside; the two exhaust ports (5) are symmetrically arranged on the bottom plate (3) of the machine shell, and the two exhaust ports (5) are positioned between the inner wall (2) of the machine shell and the outer wall (4) of the machine shell;
the method is characterized in that: the improved air conditioner is characterized in that two spiral plates (1) are fixed on the machine shell bottom plate (3), the two spiral plates (1) are sequentially spirally wound in a circumferential space between the machine shell inner wall (2) and the machine shell outer wall (4), namely one spiral plate (1) is spirally mounted in a space of 0-180 degrees of the circumference, the other spiral plate (1) is spirally mounted in a space of 180-360 degrees of the circumference, and the heights of the ends of the two spiral plates (1) are staggered at 180-degree positions of the circumferential space, so that the two spiral plates (1) respectively extend spirally from the position right above one exhaust port (5) to the other exhaust port (5), and two reducing flow channels are formed between the machine shell inner wall (2) and the machine shell outer wall (4).
2. The compressor casing with built-in screw plate according to claim 1, wherein: the spiral plate (1) is of a semi-circumferential spiral structure, so that the two reducing runners are of a semi-circumferential spiral structure.
3. The compressor casing with built-in screw plate according to claim 1 or 2, wherein: the two spiral plates (1) are symmetrically arranged around the center of the air inlet (6).
4. The compressor casing with built-in screw plate according to claim 1 or 2, wherein: the outer side ends of the two spiral plates (1) are respectively welded and fixed with the outer wall (4) of the casing, and the inner side ends of the two spiral plates (1) are respectively welded and fixed with the inner wall (2) of the casing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920975213.4U CN210461170U (en) | 2019-06-26 | 2019-06-26 | Compressor casing with built-in spiral plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920975213.4U CN210461170U (en) | 2019-06-26 | 2019-06-26 | Compressor casing with built-in spiral plate |
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| Publication Number | Publication Date |
|---|---|
| CN210461170U true CN210461170U (en) | 2020-05-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920975213.4U Active CN210461170U (en) | 2019-06-26 | 2019-06-26 | Compressor casing with built-in spiral plate |
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| CN (1) | CN210461170U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112922861A (en) * | 2021-01-29 | 2021-06-08 | 西安交通大学 | Compact low-rotation-speed centrifugal compressor |
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2019
- 2019-06-26 CN CN201920975213.4U patent/CN210461170U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112922861A (en) * | 2021-01-29 | 2021-06-08 | 西安交通大学 | Compact low-rotation-speed centrifugal compressor |
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