CN202707490U - Single screw compressor - Google Patents
Single screw compressor Download PDFInfo
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- CN202707490U CN202707490U CN 201220234205 CN201220234205U CN202707490U CN 202707490 U CN202707490 U CN 202707490U CN 201220234205 CN201220234205 CN 201220234205 CN 201220234205 U CN201220234205 U CN 201220234205U CN 202707490 U CN202707490 U CN 202707490U
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Abstract
The utility model discloses a single screw compressor. A large angle of engagement a t containing a leakage angle theta is left in advance between a screw rod and a star wheel engagement pair, wherein the large angle of engagement a t is larger than 94.5 degrees and equal to or less than 98.1818 degrees, and the value range of the leakage angle theta is larger than 0 degree and equal to or less than 3.6818 degrees. The length of the air inflow end of the screw rod is increased from 123.5 millimeters to 133.5 millimeters, and the length of a segmentation groove of a shell body is increased by 10 millimeters. After the air inflow end of a screw rod groove is closed, the screw rod groove can be fully closed only when the star wheel rotates over the theta. The volume of air inflow end opening theta is several or dozens of times larger than the volume of the air outlet end opening theta, and in addition, the rotating speed of the screw rod is nearly 3000 revolutions per minute (r. p. m), and the air density inside the closed screw rod groove is large, so that the air output volume of the compressor is increased, the volume efficiency eta is improved and the inner pressure ratio epsilon is increased. And further optimizing chosen appropriate an air inlet angle theta can reduce the specific power kilowatt / cubic meter per minute.
Description
Technical field
The utility model relates to a kind of single screw compressor.
Background technique
The major part of single screw compressor has screw rod, star-wheel and housing, and CP type single screw compressor forms engagement pair by 6 groove cylindrical screws and two 11 teeth star-wheels that the center is arranged symmetrically with on horizontal plane, is contained in the housing to consist of.Screw spiral trough, inner walls and spider piece tooth and end face consist of the basic circle volume of sealing.The power of High Rotation Speed passes to screw rod and drives the rotation of star-wheel gear piece by its spiral chute, make air enter air aspiration cavity by screw rod chamfering end face, sealed by the star-wheel gear piece again, when reducing gradually air and be compressed into design pressure along with the basic circle volume, discharged through the exhaust passage by the subtriangular relief opening of opening in inner walls.
Have spray hole on the housing of single screw compressor, oil, water or coolant are sprayed into compression chamber play cooling, sealing, absorbing, noise elimination and the effect such as lubricated after nozzle atomization.
The single-screw compressor screw head is counted Z
1=6, the spider piece tooth number Z
2=11, screw rod turns 180 °, and the spider piece tooth turns 180 ° of X 6/11=98.1818 °, and early stage data recommendation single screw compressor working pressure angle at ≈ 90 ° ， Sui the product discharge capacity and progressively increase, and foreign country and domestic production company have now selected 94.5 ° of at ≈.Compressor housing parting plane groove width B has determined that housing leaks angle θ (0)=2sin-1 (B/d1), that is determined the size of engagement pair maximum leakage angle θ max=6 (0)/11, " generally believe that working pressure angle at is too large; when at+ θ max＞98.1818 °; increased the flow inlet angle a ' of angle θ at inlet end; can be at large leakage angle θ such as exhaust end generations; the screw slot volume gas that has increased flow inlet angle θ can be by large whole light leaks of leakage angle θ volume such as exhaust ends, do not adopt large working pressure angle at so most of single screw compressor company all considers.
Based on the deficiency of above-mentioned existing single screw compressor, the utility model people has developed a kind of reservation contains the large working pressure angle at single screw compressor that leaks angle θ.
Summary of the invention
The technical problems to be solved in the utility model is: a kind of single screw compressor is provided, with change increase that prior art exists the screw slot volume gas of flow inlet angle by large deficiencies such as the whole light leaks of leakage angle volume such as exhaust ends.
The utility model is by the following technical solutions: single screw compressor of the present utility model, comprise that 6 groove cylindrical screws and two 11 teeth star-wheels that the center is arranged symmetrically with on horizontal plane of being installed in the housing form engagement pair, screw rod, star-wheel engagement pair are reserved and are contained the large working pressure angle at that leaks angle θ: 98.1818 ° 〉=at 〉=94.5 °; The span of described leakage angle θ is: 0 °＜θ≤3.6818 °.
The long L ' of screw rod inlet end rises to 133.5mm from 123.5, corresponding flow inlet angle a '=sin-1 (L '/R2) increase to 40.9970 °, working pressure angle at=a1+a ' increases to 97.9413 °, inlet end surface chamfer β=a '-δ increases to 32.5766 °, and housing slot segmentation appearance should lengthen 10mm.
The beneficial effect of single screw compressor of the present utility model is: the utility model has been broken the routine of seeing leakage Jiu Zhi Walk, take full advantage of the material that can increase the screw slot actual volume and lengthen the inlet end length L ' increase actual volume, namely adopt large working pressure angle to increase and let out rear calculated pump rate
, improve volumetric efficiency η, can improve 2% according to the verification experimental verification volumetric efficiency, also increased inner pressure ratio ε simultaneously, expanded the advantage that single screw compressor is produced the middle high-pressure product.
Description of drawings
Fig. 1 is the structural representation of prior art, is working pressure angle at when leaking among the figure, equals exhaust angle a1 and adds flow inlet angle a ', adds compressor maximum leakage angle θ max and be at=a1+a '+θ max≤98.1818 °; Star-wheel Z2=11, two horizontal plane Central Symmetries; Spiral shell Z1=6.
Fig. 2 is structural representation of the present utility model, at is for to have strengthened angle θ＞0-3.6818 ° flow inlet angle a ' at inlet end among the figure, exist to give at exhaust end and θ＞0-3.6818 ° at large leakage angle, a1+{a '+(0-3.6818 °) such as establish '≤98.1818 °; Star-wheel Z2=11, two horizontal plane Central Symmetries; Spiral shell Z1=6.
Fig. 1, the implication of reference character and numerical value are among Fig. 2: screw diameter d1=370mm, star-wheel radius R 2=203.5mm, centre distance A=296mm, core wheel is apart from a=111mm, the wide b=59.6mm of groove (tooth), the dark h=92.5 of groove (tooth), the wide half-angle δ of groove (tooth)=8.4205 °, air inlet end face angle β=28.9437 °, screw rod total length L=330mm, inlet end identity distance L '=123.5mm, screw rod revolution n1=2980 r.p.m, star-wheel revolution n2 ≈ 1625.4545 r.p.m.
Embodiment
Embodiment of the present utility model: the utility model comprises that 6 groove cylindrical screws and two 11 teeth star-wheels that the center is arranged symmetrically with on horizontal plane of being installed in the housing form engagement pair, screw rod, star-wheel engagement pair are reserved and contained the large working pressure angle at that leaks angle θ: 98.1818 ° 〉=at 〉=94.5 °, the span of leaking angle θ is: 0 °＜θ≤3.6818 °.
The long L ' of screw rod inlet end was 123.5 mm originally, lengthening 10mm after improving is 133.5mm, flow inlet angle a '=sin-1 (L '/R2), all corresponding increases of working pressure angle at=a '+a1, screw rod end face undercut ss=a '-δ { δ=sin-1 (b/2R2) }.Feature is that working pressure angle at has increased flow inlet angle θ at inlet end, and working pressure angle at the large leakage angle θ such as is reserved with at exhaust end.
Anticipate as shown in Figure 2, a kind of single screw compressor forms engagement pair by 6 groove cylindrical screws and two 11 teeth star-wheels that the center is arranged symmetrically with on horizontal plane, is contained in the housing to consist of.Screw spiral trough, inner walls and spider piece tooth and end face consist of the basic circle volume of sealing, originally there are many places to have all the time leakage during the single screw compressor normal operation, drive star-wheel gear piece by its spiral chute and rotate along with the power of High Rotation Speed passes to screw rod, when after suction port is by the sealing of star-wheel gear piece, turning over flow inlet angle θ, screw slot just all is closed, the basic circle volume begins to diminish gradually, when air is compressed into design pressure, discharged through the exhaust passage by the subtriangular relief opening of opening in inner walls.After the improvement, described screw rod, star-wheel engagement pair are reserved and are contained the large working pressure angle at that leaks angle θ and be: 98.1818 〉=at 〉=94.5 °.When at=98.1818 ° at maximum engagement angle, theoretical displacement is maximum, the high-pressure exhaust end exists the approximate little triangle of leakage angle θ formation and the less leakage volume that star-wheel facewidth b forms, and forms several times to the large admission space of decades of times and should have mutually first-class large flow inlet angle θ to form larger approximate quadrilateral and the star-wheel facewidth b of area at the suction port end.
The utility model has following result by designing and calculating: max calculation discharge capacity V (bmax) deducts and lets out rear calculated pump rate
, obtain leaking discharge capacity and be: 0.3766 m3/min.There is the large ip angle at that leaks angle θ to design in the situation that basic parameter is identical, lets out rear calculated pump rate
=66.4932 m3/min without leak angle θ designing and calculating discharge capacity Vb=64.056 m3/min large 2.4372 m3/min, be to leak 6.47 times of discharge capacity 0.3766 m3/min.For increasing calculated pump rate
Large leakage angle θ can be selected to contain with inner pressure ratio ε, suitable less leakage angle θ must be selected for falling end specific power.When screw slot is sealed by the spider piece tooth at inlet end in the screw slot volume air be to communicate with atmosphere, air not yet is compressed to and turns over flow inlet angle θ exhaust end also to be closed screw slot just totally-enclosed, air in the volume understands some because the nearly 3000r.p.m of screw speed, too soon without time escaping, volume Air content is more, the air area of coming in from suction port is larger, and the wide b of groove (tooth), flow inlet angle is identical with leakage angle θ, therefore air volume is larger, and the less leakage volume of air area that leaks from exhaust end is just little, air entrapment content increases in the screw slot volume, to exhaust end be closed rear screw slot basic circle volume just begin to reduce gradually air begin compressed, so the time actual volume in air density when leaking angle θ air density large, the compressor calculated pump rate
Greatly, the high η of volumetric efficiency, inner pressure ratio ε are large.
In the utility model, the long L ' of screw rod inlet end lengthens 10mm, has increased screw rod flow inlet angle θ and has namely strengthened screw rod flow inlet angle a ', has strengthened screw rod working pressure angle at, has strengthened screw rod end face undercut ss, increased screw rod reservation leakage angle θ.
The above, it only is the example of the utility model single screw compressor, be not that technical scope of the present utility model is imposed any restrictions, any trickle modification, equivalent variations and modification that every foundation technical spirit of the present utility model is done above example all still belong in the scope of arranging the technical program.
Claims (2)
1. single screw compressor, comprise that 6 groove cylindrical screws and two 11 teeth star-wheels that the center is arranged symmetrically with on horizontal plane of being installed in the housing form engagement pair, it is characterized in that: screw rod, star-wheel engagement pair are reserved and are contained the large working pressure angle at that leaks angle θ: 98.1818 ° 〉=at 〉=94.5 °; The span of described leakage angle θ is: 0 °＜θ≤3.6818 °.
2. single screw compressor according to claim 1, it is characterized in that: the long L ' of screw rod inlet end rises to 133.5mm from 123.5mm, and housing slot segmentation appearance should lengthen 10mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220234205 CN202707490U (en) | 2012-05-23 | 2012-05-23 | Single screw compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220234205 CN202707490U (en) | 2012-05-23 | 2012-05-23 | Single screw compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202707490U true CN202707490U (en) | 2013-01-30 |
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ID=47587797
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220234205 Expired - Fee Related CN202707490U (en) | 2012-05-23 | 2012-05-23 | Single screw compressor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202707490U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102661279A (en) * | 2012-05-23 | 2012-09-12 | 贵州中电振华精密机械有限公司 | Single-screw compressor |
-
2012
- 2012-05-23 CN CN 201220234205 patent/CN202707490U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102661279A (en) * | 2012-05-23 | 2012-09-12 | 贵州中电振华精密机械有限公司 | Single-screw compressor |
| CN102661279B (en) * | 2012-05-23 | 2016-01-27 | 贵州中电振华精密机械有限公司 | Single screw compressor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: CHINA ZHENHUA GROUP TECHNOLOGY CO., LTD. Effective date: 20141223 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20141223 Address after: 550081, No. 10, Bashang Road, Changling South Road, Jinyang New District, Guizhou, Guiyang Patentee after: Guizhou CEC Zhenhua Precision Machinery Co., Ltd. Patentee after: China Zhenhua (Group) Science & Technology Co., Ltd. Address before: 550081, No. 10, Bashang Road, Changling South Road, Jinyang New District, Guizhou, Guiyang Patentee before: Guizhou CEC Zhenhua Precision Machinery Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130130 Termination date: 20180523 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |