CN112302942A - A sliding valve structure and screw compressor - Google Patents
A sliding valve structure and screw compressor Download PDFInfo
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- CN112302942A CN112302942A CN202011359356.6A CN202011359356A CN112302942A CN 112302942 A CN112302942 A CN 112302942A CN 202011359356 A CN202011359356 A CN 202011359356A CN 112302942 A CN112302942 A CN 112302942A
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- spool valve
- slide valve
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- 230000001154 acute effect Effects 0.000 claims description 3
- 238000009434 installation Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C28/00—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids
- F04C28/10—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids characterised by changing the positions of the inlet or outlet openings with respect to the working chamber
- F04C28/12—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids characterised by changing the positions of the inlet or outlet openings with respect to the working chamber using sliding valves
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
Abstract
本发明提供了一种滑阀结构及螺杆压缩机，涉及空调器技术领域，解决了现有正圆形的滑阀结构易产生圆周偏摆的技术问题。该滑阀结构的滑阀体的横截面包括与阴转子腔内壁对应的阴侧圆弧、与阳转子腔内壁对应的阳侧圆弧以及自锁区段，且自锁区段由多段线构成，使滑阀体形成多棱柱形防转结构，滑阀体装配至螺杆压缩机的壳体后不会产生自转，防止了滑阀体的偏摆，无需设置限位装置，避免了结构的复杂化，控制了螺杆压缩机的成本，而且提高了螺杆压缩机的可靠性；由正圆形变为自锁多段线后大幅缩小滑阀结构的径向尺寸，使得压缩机的高度或宽度尺寸更加紧凑。
The invention provides a slide valve structure and a screw compressor, relates to the technical field of air conditioners, and solves the technical problem that the existing perfect circular slide valve structure is easy to produce circumferential deflection. The cross section of the spool valve body of the spool valve structure includes a female side arc corresponding to the inner wall of the female rotor cavity, a male side arc corresponding to the inner wall of the male rotor cavity and a self-locking section, and the self-locking section is composed of multi-segment lines , so that the spool valve body forms a polygonal anti-rotation structure, and the spool valve body will not rotate after being assembled to the shell of the screw compressor, which prevents the spool valve body from swinging, does not need to set a limit device, and avoids the complexity of the structure The cost of the screw compressor is controlled, and the reliability of the screw compressor is improved; the radial dimension of the spool valve structure is greatly reduced after changing from a perfect circle to a self-locking polyline, which makes the height or width of the compressor more compact. compact.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a sliding valve structure and a screw compressor.
Background
Slide valve is a regulating mechanism that is very common in screw compressors and is commonly used for capacity regulation of the compressor, or internal compression ratio regulation of the compressor. As shown in FIG. 1, the cross-sectional profile of the spool valve 02 generally comprises a projection of the curved surfaces of the rotor bore, i.e., the arc of each of the female and male rotor bores. Theoretically, it is desirable that the curved surfaces (male rotor cavity inner wall curved surface 011 and female rotor cavity inner wall curved surface 012) completely coincide with the rotor cavity inner wall curved surfaces (slide valve male side arc 021 and slide valve female side arc 022) to ensure that a complete and smooth rotor cavity inner wall is formed, properly wrapping the male and female rotors, and ensuring compressor efficiency and reliable operation.
The applicant has found that the prior art has at least the following technical problems:
in practical application, as a reciprocating slide valve part, the two curved surfaces cannot be completely matched with the curved surfaces of the inner walls of the rotor cavities of the two curved surfaces due to the processing precision, the assembly precision, the reciprocating motion, the difference of thermal expansion forms and the like; when the curved surface is higher than the curved surface of the inner wall of the rotor cavity (forming an intruding part 04), the rotor can be rubbed with the curved surface of the slide valve to cause faults; when the curved surface is lower than the curved surface of the inner wall of the rotor cavity, the clearance 03 between the tooth top of the rotor and the curved surface of the slide valve is larger than the clearance between the tooth top of the rotor and the curved surface of the inner wall of the rotor cavity, extra leakage is caused, and the efficiency of the compressor is reduced.
The contour of the valve body of the current main slide valve is mostly in a perfect circle shape (except the two curved surfaces, the other parts are circular arc sections), so that the slide valve 02 inevitably has circumferential deflection in two directions at random, and no matter which direction the slide valve 02 deflects, the curved surface is higher than or lower than the curved surface of the inner wall of the rotor cavity, see fig. 2. In order to limit the excessive circumferential runout of the slide valve 02, a limiting device, such as a positioning key, is usually arranged again, so that the complexity of the slide valve mechanism is increased, the cost of the compressor is increased, and the reliability is reduced.
In addition, the diameter of the perfect circular slide valve is often large, especially for the slide valve 02 with low internal volume ratio and large orifice, after the shape requirement of the radial exhaust orifice of the slide valve 02 is met, the diameter of the slide valve is even close to the diameter of the rotor of the compressor, so that the size, the weight and the cost of the compressor are obviously increased.
Disclosure of Invention
The invention aims to provide a slide valve structure and a screw compressor, which can at least solve the technical problem that the circular slide valve structure in the prior art is easy to generate circumferential deflection. The technical effects that can be produced by the preferred technical scheme in the technical schemes provided by the invention are described in detail in the following.
In order to achieve the purpose, the invention provides the following technical scheme:
the cross section of the slide valve body comprises a female side circular arc corresponding to the inner wall of a female rotor cavity, a male side circular arc corresponding to the inner wall of a male rotor cavity and a self-locking section, and the self-locking section is formed by a plurality of sections, so that the slide valve body forms a polygonal anti-rotation structure and can limit the self-rotation of the slide valve body.
Optionally, the self-locking section is comprised of a plurality of straight segments.
Optionally, a plurality of said straight segments are rounded off.
Optionally, the self-locking section comprises three straight segments.
Optionally, the self-locking section comprises a first section, a second section and a third section, the first section being horizontally disposed.
Optionally, the second segment and the third segment are symmetrically disposed along a perpendicular bisector of the first segment.
Optionally, an included angle between the second section and the first section is α, an included angle between the third section and the first section is β, and both the included angle α and the included angle β are acute angles.
Optionally, the angle α ═ β.
Optionally, the self-locking section tapers from a bottom side away from the rotor cavity to a direction closer to the rotor cavity.
The invention provides a screw compressor, which comprises a shell and any one of the slide valve structures.
According to the slide valve structure and the screw compressor with the same, the cross section of the slide valve body comprises the female side circular arc corresponding to the inner wall of the female rotor cavity, the male side circular arc corresponding to the inner wall of the male rotor cavity and the self-locking section, and the self-locking section is formed by multiple sections of lines, so that the slide valve body forms a polygonal anti-rotation structure, the slide valve body cannot rotate after being assembled to a shell of the screw compressor, the slide valve body is prevented from deflecting, a limiting device is not required to be arranged, the complexity of the structure is avoided, the cost of the screw compressor is controlled, and the reliability of the screw compressor is improved; the radial size of the slide valve structure is greatly reduced after the circle is changed into a self-locking multi-segment line, so that the height or width of the compressor is more compact.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic cross-sectional view of a prior art screw compressor with a right circular slide valve;
FIG. 2 is a schematic view of the spool valve configuration of FIG. 1 in a state of deflection;
FIG. 3 is a schematic view of a first slide valve configuration according to an embodiment of the present invention installed in a screw compressor;
fig. 4 is a schematic structural view of a second slide valve structure according to an embodiment of the present invention installed in a screw compressor.
In the figure 01, the compressor housing; 011. the inner wall of the cavity of the male rotor is curved; 012. the inner wall of the cavity of the female rotor is curved; 02. a spool valve; 021. the slide valve is in a male side arc shape; 022. the female side of the slide valve is arc-shaped; 03. a gap; 04. an intrusion section;
1. a housing; 11. the inner wall of the male rotor cavity; 12. the inner wall of the female rotor cavity; 2. a spool valve body; 21. the arc of the male side; 22. a female side arc; 23. a self-locking section; 231. a first section; 232. a second section; 233. a third section.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.
As shown in fig. 3 and 4, the present invention provides a slide valve structure, which includes a slide valve body 2, wherein a cross section of the slide valve body 2 includes a female side arc 22 corresponding to an inner wall 12 of a female rotor cavity, a male side arc 21 corresponding to an inner wall 11 of a male rotor cavity, and a self-locking section 23, and the self-locking section 23 is formed by a plurality of segments, so that the slide valve body 2 forms a multi-prism anti-rotation structure, which can limit the rotation of the slide valve body 2.
The cross section of the slide valve body 2 comprises a self-locking section 23, the self-locking section 23 is formed by a plurality of sections, so that the slide valve body 2 forms a polygonal anti-rotation structure, the slide valve body 2 cannot rotate after being assembled to the shell 1 of the screw compressor, the deflection of the slide valve body 2 is prevented, a limiting device is not required to be arranged, the complexity of the structure is avoided, the cost of the screw compressor is controlled, and the reliability of the screw compressor is improved.
As an alternative embodiment, the latching section 23 is formed by a plurality of straight segments, so that a self-rotation of the slide valve body 2 is effectively avoided.
As an optional implementation mode, the multiple straight line segments are rounded off, and collision damage is reduced.
As an alternative embodiment, the self-locking section 23 comprises three straight segments, respectively a first section 231, a second section 232 and a third section 233, the first section 231 being arranged horizontally. On the basis of preventing the slide valve body 2 from rotating, the structure is simple and the processing is convenient; the first section 231 is horizontally arranged, which is beneficial to reducing the size in the vertical direction, namely reducing the radial size of the slide valve structure, simplifying the structure and saving the cost.
As an alternative embodiment, the second segment 232 and the third segment 233 are symmetrically arranged along the perpendicular bisector of the first segment 231, so that the installation is not distinguished, and is quick and convenient.
As an alternative embodiment, the included angle between the second section 232 and the first section 231 is α, the included angle between the third section 233 and the first section 231 is β, and both the included angle α and the included angle β are acute angles, so that a tapered structure with a lower dimension larger than an upper dimension is formed, and the spool body 2 is prevented from being lifted up.
As an alternative embodiment, the included angle α ═ β, the structure is symmetrical, and the processing and installation are convenient.
As an alternative embodiment, the self-locking section 23 tapers from the bottom side away from the rotor cavity to the direction close to the rotor cavity, which can simultaneously ensure that the slide valve does not have a lifting hazard without adding an additional limiting mechanism.
As shown in fig. 3, the cross-sectional profile of the spool valve is composed of a spool valve male side circular arc 21, a spool valve female side circular arc 22, a spool valve male side plane as the second section 232 of the self-locking section 23, a spool valve female side plane as the third section 233, and a spool valve bottom plane as the first section 231. The cross section of the shape ensures that the sliding valve body 2 does not deflect in the circumferential direction after being assembled in the shell 1 of the screw compressor, so that other deflection-preventing structural designs are not needed. Meanwhile, except for the slide valve male side arc 21 and the slide valve female side arc 22 in the cross-sectional profile of the slide valve body 2, the rest sections are not formed by an arc, but by a plurality of planes with projections as straight line segments, so that the vertical distance H from the first section 231 to the center of the rotor cavity can be set at will according to actual conditions, and can be reduced to the minimum value according to manufacturability, so that the slide valve body 2 does not additionally increase the overall width or height of the compressor, and the overall appearance of the whole compressor is more compact.
As shown in fig. 4, the slide valve male side plane and the slide valve female side plane are respectively inclined toward the middle by the angles α and β, so that the slide valve body 2 is "locked" by the casing 1 of the screw compressor, and the upward lifting of the slide valve body 2 is restricted.
In practical application, the lengths of the arc 21 on the male side of the slide valve and the arc 22 on the female side of the slide valve can be adjusted arbitrarily according to the size of the discharge hole of the compressor, and are not limited by the dimension H. In the conventional circular slide valve, after the distance from the axis to the connecting line of the axes of the male rotor cavity and the female rotor cavity is determined, the size H is obtained by adding the radius of the circular slide valve. When the slide valve is not designed according to a perfect circle, the slide valve is not limited by the radius, namely the slide valve can be made to be flat, the size H is reduced, the size of the compressor is further reduced, and the screw compressor is more compact.
The invention provides a screw compressor, which comprises a shell 1 and any slide valve structure.
After the screw compressor uses the slide valve structure, the screw compressor can automatically limit the position, prevent the occurrence of deflection and does not need to add extra parts; meanwhile, the radial size of the slide valve structure is greatly reduced, so that the height or width of the compressor is more compact, the cost of the compressor is reduced, the structure of the running part of the compressor is simplified, and the performance and the reliability of the compressor are improved.
In the description of the invention, it is to be noted that "a plurality" means two or more unless otherwise specified; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing and simplifying the description, but do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated, and thus are not to be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood as appropriate to those of ordinary skill in the art.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011359356.6A CN112302942A (en) | 2020-11-27 | 2020-11-27 | A sliding valve structure and screw compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011359356.6A CN112302942A (en) | 2020-11-27 | 2020-11-27 | A sliding valve structure and screw compressor |
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| Publication Number | Publication Date |
|---|---|
| CN112302942A true CN112302942A (en) | 2021-02-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011359356.6A Pending CN112302942A (en) | 2020-11-27 | 2020-11-27 | A sliding valve structure and screw compressor |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4802457A (en) * | 1985-10-14 | 1989-02-07 | Svenska Rotor Maskiner Ab | Internal combustion engine provided with a supercharger |
| CN101258323A (en) * | 2005-09-07 | 2008-09-03 | 开利公司 | Slide valve |
| CN103486038A (en) * | 2012-06-12 | 2014-01-01 | 珠海格力电器股份有限公司 | Slide valve, slide valve adjusting mechanism and screw compressor with slide valve adjusting mechanism |
| CN106089721A (en) * | 2016-08-11 | 2016-11-09 | 成都陵川常友汽车部件制造有限公司 | The quality inspection system of engine noise reduction element |
| WO2016189648A1 (en) * | 2015-05-26 | 2016-12-01 | 三菱電機株式会社 | Screw compressor and refrigeration cycle device comprising screw compressor |
| US20190093657A1 (en) * | 2017-09-28 | 2019-03-28 | Ingersoll-Rand Company | Suction side slide valve for a screw compressor |
| CN110486277A (en) * | 2019-09-18 | 2019-11-22 | 珠海格力电器股份有限公司 | Helical-lobe compressor and air-conditioner set |
| CN214170834U (en) * | 2020-11-27 | 2021-09-10 | 珠海格力电器股份有限公司 | Slide valve structure and screw compressor |
-
2020
- 2020-11-27 CN CN202011359356.6A patent/CN112302942A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4802457A (en) * | 1985-10-14 | 1989-02-07 | Svenska Rotor Maskiner Ab | Internal combustion engine provided with a supercharger |
| CN101258323A (en) * | 2005-09-07 | 2008-09-03 | 开利公司 | Slide valve |
| CN103486038A (en) * | 2012-06-12 | 2014-01-01 | 珠海格力电器股份有限公司 | Slide valve, slide valve adjusting mechanism and screw compressor with slide valve adjusting mechanism |
| WO2016189648A1 (en) * | 2015-05-26 | 2016-12-01 | 三菱電機株式会社 | Screw compressor and refrigeration cycle device comprising screw compressor |
| CN106089721A (en) * | 2016-08-11 | 2016-11-09 | 成都陵川常友汽车部件制造有限公司 | The quality inspection system of engine noise reduction element |
| US20190093657A1 (en) * | 2017-09-28 | 2019-03-28 | Ingersoll-Rand Company | Suction side slide valve for a screw compressor |
| CN110486277A (en) * | 2019-09-18 | 2019-11-22 | 珠海格力电器股份有限公司 | Helical-lobe compressor and air-conditioner set |
| CN214170834U (en) * | 2020-11-27 | 2021-09-10 | 珠海格力电器股份有限公司 | Slide valve structure and screw compressor |
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