CN201526456U - Screw compressor - Google Patents
Screw compressor Download PDFInfo
- Publication number
- CN201526456U CN201526456U CN2009202180573U CN200920218057U CN201526456U CN 201526456 U CN201526456 U CN 201526456U CN 2009202180573 U CN2009202180573 U CN 2009202180573U CN 200920218057 U CN200920218057 U CN 200920218057U CN 201526456 U CN201526456 U CN 201526456U
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- circle
- helical
- compressor
- compression chamber
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Abstract
The utility model provides a screw compressor which comprises a machine body, a compressor rotor, a bearing piece and a slide valve, wherein the machine body is provided with a slide valve cavity used for containing the slide valve and a compression cavity used for containing the compressor rotor; the compressor rotor is supported in the compression cavity by the bearing piece; and the distance d1 between the bottommost end of a circumcircle of the compressor rotor and the bottommost end of the compression cavity is longer than the distance between the topmost end of the circumcircle of the compressor rotor and the topmost end of the compression cavity. In the loading process of the screw compressor, scuffing phenomenon of the compressor rotor and the machine body compression cavity can be efficiently avoided, thereby achieving the effects of eliminating generation of abnormal sounds of the compressor and enhancing the reliability of the screw compressor.
Description
Technical field
The utility model relates to the air conditioner field, in particular to a kind of helical-lobe compressor.
Background technique
The helical-lobe compressor of prior art is in the capacity loading procedure, because the effect (guiding valve generally is in the top of compressor drum) of guiding valve side exhaust pressure, the radial force of compressor drum increases with effective reduction length of compressor drum.The compressor drum two ends are supported by bearing member (for example comprising radial bearing and angular contact bearing), reason owing to bearing clearance, vertical misalignment takes place in compressor drum under the effect of compressor drum radial force, at the guiding valve opposition side, gap between compressor drum and the body will reduce, cause helical-lobe compressor compressor drum and the abrasive phenomenon of body may occur like this in loading procedure, abnormal sound appears in helical-lobe compressor, causes the helical-lobe compressor can not reliable operation.
The inventor finds that there are the following problems at least in the prior art: the compressor drum of prior art in loading procedure easily and body rub, cause the helical-lobe compressor can not reliable operation.
The model utility content
The utility model aims to provide a kind of helical-lobe compressor, the compressor drum that can solve prior art in loading procedure easily and body rub, cause the problem that helical-lobe compressor can not reliable operation.
In embodiment of the present utility model, a kind of helical-lobe compressor is provided, comprising: body; Compressor drum; Bearing member; Guiding valve; Body has piston chamber that holds guiding valve and the compression chamber that holds compressor drum; Compressor drum is supported in the compression chamber by bearing member; The compressor drum circumcircle arrive bottom compression chamber bottom arrive compression chamber distance topmost apart from d1 topmost greater than the compressor drum circumcircle.
Preferably, compressor drum comprises: male rotor that is meshed and female rotor; The axle center of male rotor and the axle center of female rotor are positioned on the same horizontal plane.
Preferably, the compression chamber longitudinal cross-section comprises: the circular-arc cavity in upper end, and it has first center of circle and the 3rd center of circle that is positioned at same horizontal plane; The circular-arc cavity in lower end, it has second center of circle and the 4th center of circle that is positioned at same horizontal plane; The circular-arc cavity in upper end is connected by intermediate portion with the circular-arc cavity in lower end; Second center of circle be positioned at first center of circle under; The 4th center of circle be positioned at the 3rd center of circle under; The initial shaft core position of first home position and male rotor coincides; The initial shaft core position of the 3rd home position and female rotor coincides.
Preferably, the perpendicular distance d2 in first center of circle and second center of circle is greater than the radial internal clearance of bearing member.
Preferably, the perpendicular distance d2 in first center of circle and second center of circle equals the radial internal clearance of bearing member.
Preferably, the radial internal clearance of bearing member is 0.04～0.07mm.
Preferably, the perpendicular distance d2 in first center of circle and second center of circle is 0.05～0.08mm.
Compressor drum takes place vertically to offset downward under the effect of rotor radial power, because adopted the compressor drum circumcircle arrive bottom compression chamber bottom arrive compression chamber distance topmost apart from d1 topmost greater than the compressor drum circumcircle, when compressor drum takes place vertically to offset downward, compressor drum also still and leave the space between the body, so overcome compressor drum in the prior art owing to be subjected to from the guiding valve side exhaust pressure effect above the compressor drum, displacement downwards takes place vertically in compressor drum because of radial force increases, easy and body rubs, cause helical-lobe compressor to move insecure problem, and then reached elimination compressor abnormal sound, improve the effect of helical-lobe compressor operational reliability.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present utility model, constitutes the application's a part, and illustrative examples of the present utility model and explanation thereof are used to explain the utility model, do not constitute improper qualification of the present utility model.In the accompanying drawings:
Fig. 1 has schematically shown the main TV structure according to a kind of helical-lobe compressor of the utility model embodiment;
Fig. 2 has schematically shown the cross-section structure according to a kind of helical-lobe compressor of the utility model embodiment;
Fig. 3 has schematically shown the structure according to the compression chamber of a kind of helical-lobe compressor of the utility model embodiment.
Embodiment
Below with reference to the accompanying drawings and in conjunction with the embodiments, describe the utility model in detail.
Fig. 1 to Fig. 3 has schematically shown the structure according to a kind of helical-lobe compressor of the utility model embodiment, as shown in the figure, comprising: body 6; Compressor drum 3 for example comprise the male rotor 36 and the female rotor 37 that are meshed, and the axle center of the axle center of male rotor 36 and female rotor 37 is positioned on the same horizontal plane; Bearing member 1; Guiding valve; Body 6 has piston chamber 7 that holds guiding valve and the compression chamber that holds compressor drum 3; Compressor drum 3 is supported in the compression chamber by bearing member 1; Compressor drum 3 circumcircles arrive bottom compression chamber bottom arrive compression chamber distance topmost apart from d1 topmost greater than the compressor drum circumcircle.Above-mentioned compression chamber is meant the compression chamber inwall bottom bottom; Compression chamber is meant the top of compression chamber inwall topmost.The helical-lobe compressor of prior art, compressor drum 3 circumcircles are bottom to compression chamber equaling compressor drum 3 circumcircles apart from d1 and arrive compression chamber distance topmost topmost bottom, compressor drum 3 can be done normal operation just in compression chamber, compressor drum 3 takes place vertically to offset downward under the effect of rotor radial power, and compressor drum 3 lower ends are easy to abrade with the lower end of compression chamber.According to a kind of helical-lobe compressor of the present utility model because adopted compressor drum 3 circumcircles arrive bottom compression chamber bottom arrive the distance of compression chamber the top topmost greater than compressor drum 3 circumcircles apart from d1.Like this when compressor drum 3 takes place vertically to offset downward under the effect of exhaust pressure and rotor radial power, compressor drum 3 also still and leave suitable gap between the body 6, compressor drum 3 can not produce friction with body 6, has avoided the generation of helical-lobe compressor abnormal sound.
Preferably, the compression chamber longitudinal cross-section comprises: the circular-arc cavity 51 in upper end, and it has first center of circle 55 and the 3rd center of circle 57 that is positioned at same horizontal plane; The circular-arc cavity 52 in lower end, it has second center of circle 56 and the 4th center of circle 58 that is positioned at same horizontal plane; The circular-arc cavity in upper end circular-arc cavity 51 and lower end 52 is connected by intermediate portion; Second center of circle 56 be positioned at first center of circle 55 under; The 4th center of circle 58 be positioned at the 3rd center of circle 57 under; 55 positions, first center of circle and male rotor 36 initial shaft core positions coincide; 57 positions, the 3rd center of circle and female rotor 37 initial shaft core positions coincide.
Preferred embodiment according to a kind of helical-lobe compressor of the present utility model is as described below: described helical-lobe compressor is a double-screw compressor, and compressor drum 3 comprises that the axle center is positioned at male rotor 36 and the female rotor 37 on the same horizontal plane; The circular-arc cavity 51 in upper end is fit to hold the rotation of male rotor 36 and female rotor 37, the circular-arc cavity 51 in upper end has first center of circle 55 and the 3rd center of circle 57 that is positioned at same horizontal plane, first center of circle 55 coincides with the initial shaft core position of male rotor 36, and the 3rd center of circle 57 coincides with the initial shaft core position of female rotor 37.Circular-arc cavity 51 and circular-arc cavity 52 equal and opposite in directions in described lower end, symmetrical configuration generally speaking.The circular-arc cavity 52 in lower end is fit to hold the rotation of male rotor 36 and female rotor 37, and the circular-arc cavity 52 in lower end has second center of circle 56 and the 4th center of circle 58 that is positioned at same horizontal plane.For example the perpendicular distance d2 in first center of circle 55 and second center of circle 56 equals the radial internal clearance of bearing member 3, male rotor 36 and female rotor 37 are under the effect of rotor radial power, because there is radial internal clearance in bearing member 1, male rotor 36 and female rotor 37 are along the skew that is directed downwards of rotor radial power, even when male rotor 36 and female rotor 37 reach maximum vertical misalignment amount, this moment, the axle center and second center of circle 56 of male rotor 36 coincided, the axle center of female rotor 37 and the 4th center of circle 58 coincide, male rotor 36 and female rotor 37 also still can normal rotation, do not produce friction, thereby avoided the generation of helical-lobe compressor abnormal sound with body 6.
Preferably, the perpendicular distance d2 in first center of circle 55 and second center of circle 56 is greater than the radial internal clearance of bearing member.The radial internal clearance of bearing member is generally 0.04～0.07mm, and the perpendicular distance d2 in first center of circle 55 and second center of circle 56 can be 0.05～0.08mm.For example, when the radial internal clearance of bearing member 1 was 0.04mm, the perpendicular distance d2 in first center of circle 55 and second center of circle 56 can be 0.05mm.Even this moment, compressor drum 3 reached maximum vertically during the amount of offseting downward, the axle center of male rotor 36 is between first center of circle 55 and second center of circle 56, the axle center of female rotor 37 is between the 3rd center of circle 57 and the 4th center of circle 58, and compressor drum can not produce friction with body too.In addition, the compressor drum vertically amount of offseting downward generally can not reach maximum value, as long as compressor drum 3 circumcircles arrive bottom compression chamber bottom arrive the distance of compression chamber the top topmost greater than the compressor drum circumcircle apart from d1, satisfy compressor drum 3 and produce a spot of normal operation after vertically offseting downward and get final product, that is to say that the perpendicular distance d2 in first center of circle 55 and second center of circle 56 also can be less than the radial internal clearance of bearing member.The compression chamber longitudinal cross-section of existing helical-lobe compressor only has the circular-arc cavity 51 in upper end and circular-arc cavity 52, the first centers of circle 55, lower end and second center of circle 56 and coincides, and male rotor 36 axle center and second center of circle 56 coincide; The 3rd center of circle 57 and the 4th center of circle 58 coincide, female rotor 37 axle center and the 4th center of circle 58 coincide, compressor drum 3 can be done normal operation just in compression chamber, like this when male rotor 36 and female rotor 37 take place vertically to offset downward under the effect of guiding valve side exhaust pressure, be easy to rub, just solved the problems referred to above of prior art according to a kind of helical-lobe compressor of the present utility model with body 6.
As can be seen from the above description, the utility model the above embodiments have realized following technique effect:
According to a kind of helical-lobe compressor of the present utility model in loading procedure, the scratch phenomenon that can effectively avoid compressor drum and body in the helical-lobe compressor loading procedure, to occur, reached the generation of eliminating the helical-lobe compressor abnormal sound, improve the reliability of helical-lobe compressor, especially improved the effect of semi-enclosed helical-lobe compressor reliability of operation.
Be preferred embodiment of the present utility model only below, be not limited to the utility model, for a person skilled in the art, the utility model can have various changes and variation.All within spirit of the present utility model and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.
Claims (7)
1. a helical-lobe compressor is characterized in that, comprising:
Body; Compressor drum; Bearing member; Guiding valve;
Described body has piston chamber that holds described guiding valve and the compression chamber that holds described compressor drum;
Described compressor drum is supported in the described compression chamber by described bearing member;
Described compressor drum circumcircle arrive bottom described compression chamber bottom arrive described compression chamber distance topmost apart from d1 topmost greater than described compressor drum circumcircle.
2. a kind of helical-lobe compressor according to claim 1 is characterized in that, described compressor drum comprises: male rotor that is meshed and female rotor; The axle center of described male rotor and the axle center of described female rotor are positioned on the same horizontal plane.
3. a kind of helical-lobe compressor according to claim 2 is characterized in that, described compression chamber longitudinal cross-section comprises: the circular-arc cavity in upper end, and it has first center of circle and the 3rd center of circle that is positioned at same horizontal plane; The circular-arc cavity in lower end, it has second center of circle and the 4th center of circle that is positioned at same horizontal plane; The circular-arc cavity in described upper end is connected by intermediate portion with the circular-arc cavity in described lower end; Described second center of circle be positioned at described first center of circle under; Described the 4th center of circle be positioned at described the 3rd center of circle under; Described first home position and the initial shaft core position of described male rotor coincide; Described the 3rd home position and the initial shaft core position of described female rotor coincide.
4. a kind of helical-lobe compressor according to claim 3 is characterized in that, the perpendicular distance d2 in described first center of circle and described second center of circle is greater than the radial internal clearance of described bearing member.
5. a kind of helical-lobe compressor according to claim 3 is characterized in that, the perpendicular distance d2 in described first center of circle and described second center of circle equals the radial internal clearance of described bearing member.
6. a kind of helical-lobe compressor according to claim 4 is characterized in that, the radial internal clearance of described bearing member is 0.04～0.07mm.
7. a kind of helical-lobe compressor according to claim 4 is characterized in that, the perpendicular distance d2 in described first center of circle and described second center of circle is 0.05～0.08mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202180573U CN201526456U (en) | 2009-11-11 | 2009-11-11 | Screw compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202180573U CN201526456U (en) | 2009-11-11 | 2009-11-11 | Screw compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201526456U true CN201526456U (en) | 2010-07-14 |
Family
ID=42517744
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202180573U Expired - Lifetime CN201526456U (en) | 2009-11-11 | 2009-11-11 | Screw compressor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201526456U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102052315B (en) * | 2009-11-11 | 2012-12-26 | 珠海格力电器股份有限公司 | Screw compressor |
-
2009
- 2009-11-11 CN CN2009202180573U patent/CN201526456U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102052315B (en) * | 2009-11-11 | 2012-12-26 | 珠海格力电器股份有限公司 | Screw compressor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20100714 Effective date of abandoning: 20091111 |
|
| RGAV | Abandon patent right to avoid regrant |