CN101886630A - Double-screw air compressor - Google Patents
Double-screw air compressor Download PDFInfo
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- CN101886630A CN101886630A CN 201010236962 CN201010236962A CN101886630A CN 101886630 A CN101886630 A CN 101886630A CN 201010236962 CN201010236962 CN 201010236962 CN 201010236962 A CN201010236962 A CN 201010236962A CN 101886630 A CN101886630 A CN 101886630A
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Abstract
The invention discloses a double-screw air compressor, which belongs to an air compressor. The double-screw air compressor comprises a compressor host assembly and a driving assembly, wherein the compressor host assembly comprises a compressor body, a male rotor, a female rotor, a suction end cover, an exhaust end cover and an exhaust cover. The double-screw air compressor is characterized in that: the driving assembly is a permanent magnet synchronous motor; the permanent magnet synchronous motor comprises a motor shell, a motor rear cover, a motor front cover, a stator component, a rotor component and a motor shaft; the motor rear cover and the motor front cover are arranged on a left port and a right port in the length direction of the motor shell, the motor shell is fixed on the suction end cover, and the stator component is placed in a die cavity of the motor shell and fixed with the inner wall of the motor shell; and the motor shaft is formed by extending a male rotor shaft of the male rotor to the die cavity direction of the motor shell, and the rotor component is arranged on the motor shaft and corresponds to the stator component. The double-screw air compressor has the advantages of overcoming the defect of low efficiency of the primary asynchronous motor, obtaining a small integral volume, realizing multiple flexible arrangements, preventing the motor shaft from being magnetized, enabling the motor to work normally, having low cost and improving the running stability of the compressor.
Description
Technical field
The invention belongs to the air compressor technical field, be specifically related to a kind ofly directly drive the straight connection type double-screw air compressor of male rotor axle by permagnetic synchronous motor, is the improvement to the driver part structure of existing double-screw air compressor.
Background technique
Prime mover of traditional screw air compressor adopts asynchronous motor usually, adopts usually by coupling to drive or utilize the speedup of belt or gear to drive on driving mode.The shortcoming that drives with asynchronous motor is: first, the rotating speed of asynchronous motor is fixed, when compressor is fully loaded with work, the asynchronous motor working efficiency reaches the highest, and when the work of compressor section load or no-load, asynchronous motor is still with the rotary speed working of full load, efficient reduces even is in idle running, and the load factor that compressor uses may surpass 90% hardly, so its complete machine energy consumption height, efficient is low; Second, because the asynchronous motor volume ratio is bigger, and need come the Driven Compressor host work by coupling, cause the machine shape size bigger, consider from the angle of the whole compressor unit of making small volume, wherein comprise the bearing that is used for fixing motor in the compressor unit, obvious this compressor is irrational.Utilize the shortcoming of the speedup driving of belt or gear to be: described compressor is used to hold the gear-box of overdrive gear except one of needs, also need many parts, for example be used to rotate and support overdrive gear bearing, be used to install the running shaft of this overdrive gear, have the speedup effect and be used for the belt of transferring power and belt pulley or the like, thereby make the cost of compressor increase.
And for example, China utility model patent notice of authorization CN2568841Y discloses a kind of " helical-lobe compressor variable transmission mechanism ", it comprises helical-lobe compressor fuselage and the gear-box that links to each other with fuselage, be positioned at the driving gear and the driven gear of gear-box, driven gear is fixed on the male rotor axle head, and at the female rotor axle head, driving gear and gear shaft are affixed to be integral driving gear by built-in Bearing Installation, gear shaft shaft extension end can be installed elastic coupling flexible coupling, links with driving machine (motor).The advantage that this structure has is: this helical-lobe compressor driving mechanism is installed on the yin, yang rotor shaft owing to driving and driven gear, elastic coupling flexible coupling can be installed, the impact that produces in the time of can reducing working gear, make the assembly precision of gear pair that raising and assurance arranged, corresponding prolongation of life-span can be widely used on the helical-lobe compressor that needs the speed change transmission.But, also there is following shortcoming in actual use in said structure: at first, under the installing space condition of limited, need the compressor unit structure simpler and compact, this helical-lobe compressor is owing to installed the bigger asynchronous motor of gear-box, coupling and volume, make that the outer generating gear of compressor is bigger, compactedness is also relatively poor, therefore is not suitable for little space mounting; Secondly, this helical-lobe compressor needs devices such as mounting teeth roller box, coupling, and it is not too reasonable to consider from the angle of saving cost; Once more, this helical-lobe compressor with asynchronous motor as driver part, so efficient is low, not energy-conservation.
Summary of the invention
Task of the present invention be to provide a kind of simple and compact for structure, volume is little, transmission total efficiency height, cost are low, good energy-conserving effect and be easy to the double-screw air compressor arranging and install.
Task of the present invention is finished like this, a kind of double-screw air compressor, comprise compressor host parts and driver part, described compressor host parts comprise body, male rotor, female rotor, air-breathing end cap, the exhaust end cap, and exhaust cap, described air-breathing end cap, the exhaust end cap is separately fixed at the left side of body length direction, on the right-hand member port, described male rotor places in the die cavity of body, the two ends of male rotor place the bearing support of air-breathing end cap and exhaust end cap respectively rotationally by the male rotor axle, described female rotor places in the die cavity of body and with male rotor and is meshing with each other, the two ends of female rotor place the bearing support of air-breathing end cap and exhaust end cap respectively rotationally by the female rotor axle, described exhaust cap is fixed on the right-hand member port of exhaust end cap length direction, be characterized in: described driver part is a permagnetic synchronous motor, this permagnetic synchronous motor comprises motor casing, the motor bonnet, the motor protecgulum, stator component, rotor part, and motor shaft, described motor bonnet, the motor protecgulum is installed in the left side of motor casing length direction respectively, on the right-hand member port, described motor casing covers by the suction end that the motor protecgulum is fixed on the compressor host parts, and described stator component places in the die cavity of motor casing and fixes with the inwall of motor casing; Described motor shaft is directly extended by the die cavity direction of the male rotor axial direction electric machine shell on the male rotor and constitutes, the axle head of motor shaft places the bearing support of motor bonnet rotationally, and described rotor part is installed on the motor shaft and is corresponding with described stator component.
In a specific embodiment of the present invention, described rotor part comprises gland, rotor body, punching, permanent magnet and fan, described rotor body is to be cast as ring-type by NULL, this rotor body is set on the described motor shaft, on the excircle of rotor body, be arranged with plural number piece punching along its length, the elongated slot that radially offers interruption-like distribution in each punching, the position of the elongated slot in each punching is corresponding, in elongated slot, be embedded with permanent magnet, be respectively arranged with gland and the fan that is used for fixing permanent magnet at the two ends of permanent magnet length direction.
In another specific embodiment of the present invention, described motor shaft is equipped with first oil sealing, second oil sealing that seals in the end end near air-breathing end cap, and described first oil sealing, second oil sealing are fixed in the oil sealing fitting seat of motor protecgulum.
Go back in the specific embodiment of the present invention, described motor shaft is fixed on rotor part on the motor shaft with locking nut after installing rotor part.
In another specific embodiment of the present invention, the axle head of described motor shaft places the bearing support of motor bonnet rotationally by bearing, has additional O type circle on the radially outer ring of described bearing.
In another specific embodiment of the present invention, an end of described male rotor axle is installed in the bearing support of air-breathing end cap rotationally by the male rotor clutch shaft bearing; The other end of described male rotor axle is installed in the bearing support of exhaust end cap rotationally by male rotor second bearing, male rotor the 3rd bearing, and puts the male rotor end ring again after axle head is with the locking of male rotor locking nut.
In of the present invention and then specific embodiment, an end of described female rotor axle is installed in the bearing support of air-breathing end cap rotationally by the female rotor clutch shaft bearing, and the female rotor clutch shaft bearing that secures the above with back-up ring at axle head; The other end of described female rotor axle is installed in the bearing support of exhaust end cap rotationally by female rotor second bearing, female rotor the 3rd bearing, and puts the female rotor end ring again after axle head is with the locking of female rotor locking nut.
More of the present invention and in specific embodiment, the elongated slot of offering in the described punching be shaped as regular polygon.
In again of the present invention and then specific embodiment, described body and exhaust end cap are that integral production forms.
Of the present invention again more and in specific embodiment, described body and exhaust end cap are to fix by fastening piece behind the split production.
The present invention is because after adopting said structure, the beneficial effect that has: first, with the driver part of permagnetic synchronous motor as the compressor host parts, be a kind of high efficiency, can change the drive motor of rotating speed by control, when compressor is fully loaded with work, the Permanent Magnet and Electric function is efficiently moved, when compressor section load or no-load operation, the Permanent Magnet and Electric function is regulated rotating speed or is stopped operating, and in adjustment process, still can keep high efficient, cut down the consumption of energy, so solved the shortcoming of original asynchronous motor inefficiency; Second, the motor shaft of permagnetic synchronous motor and the male rotor axle of compressor host parts are adopted same running shaft, saved a step bearing of original asynchronous motor, make complete machine on boundary dimension, realize minimizing, particularly shortened 40% on the length direction, not only reduced cost, little for client's use simultaneously owing to volume, can realize multiple layout flexibly; The 3rd, rotor body is formed by the NULL casting, avoids motor shaft to be magnetized; The 4th, if motor shaft is unsettled, because the action of gravity motor shaft of rotor part can produce deflection deformation, rub so, burn stator thereby rotor part and stator component are produced, shorten motor working life, so the axle head at motor shaft is installed bearing, sets up O type circle again on the outer ring of bearing, can overcome the deflection deformation of motor shaft like this, reduce the ricing in gap between rotor part and the stator component, make the motor proper functioning; At last, omitted the overdrive gear in the prior art, belt and similar speeder, thereby made this compressor compact integral structure, light, thereby made compressor set cheap and can improve its stability.
Description of drawings
Fig. 1 is one embodiment of the invention structural representation
Fig. 2 is the sectional view of permagnetic synchronous motor for driver part of the present invention
Among the figure: 1. motor bonnet; 2. motor casing; 3. stator component; 4. rotor part; 5. motor protecgulum; 6. air-breathing end cap; 7. male rotor clutch shaft bearing; 8. body; 9. male rotor; 10. exhaust end cap; 11. male rotor second bearing; 12. male rotor the 3rd bearing; 13. male rotor locking nut; 14. male rotor end ring; 15. exhaust cap; 16. female rotor end ring; 17. female rotor locking nut; 18. female rotor the 3rd bearing; 19. female rotor second bearing; 20. female rotor; 21. male rotor axle; 22. female rotor axle; 23. female rotor clutch shaft bearing; 24. back-up ring; 25. second oil sealing; 26. first oil sealing; 27. motor shaft; 28. gland; 29. rotor body; 30. punching; 31. permanent magnet; 32. locking nut; 33. fan; 34. bearing; 35.O type circle; 36. end cap; 37. elongated slot.
Embodiment
For the auditor that the makes Patent Office especially public can be expressly understood technical spirit of the present invention and beneficial effect more, the claimant general elaborates in conjunction with the accompanying drawings in embodiment's mode below, but to embodiment's description all is not restriction to the present invention program, any according to the present invention's design done only for pro forma but not substantial equivalent transformation all should be considered as technological scheme category of the present invention.
See also Fig. 1 and in conjunction with Fig. 2, a kind of double-screw air compressor, comprise compressor host parts and driver part, described compressor host parts comprise body 8, male rotor 9, female rotor 20, air-breathing end cap 6, exhaust end cap 10 and exhaust cap 15, described air-breathing end cap 6, exhaust end cap 10 are separately fixed on the left and right end port of body 8 length directions, wherein: described body 8 can be that both integral productions form with exhaust end cap 10, also can be to be connected and fixed by fastening piece behind both split productions again; Described male rotor 9 places in the die cavity of body 8, and the two ends of male rotor 9 have male rotor axle 21 respectively, and wherein: an end of male rotor axle 21 is installed in the bearing support of air-breathing end cap 6 rotationally by male rotor clutch shaft bearing 7; The other end of described male rotor axle 21 is installed in the bearing support of exhaust end cap 10 rotationally by male rotor second bearing 11, male rotor the 3rd bearing 12, and puts male rotor end ring 14 again after axle head is with 13 lockings of male rotor locking nut; Described female rotor 20 places in the die cavity of body 8 and with male rotor 9 and is meshing with each other, the two ends of female rotor 20 have female rotor axle 22 respectively, wherein: an end of described female rotor axle 22 is installed in the bearing support of air-breathing end cap 6 rotationally by female rotor clutch shaft bearing 23, and the female rotor clutch shaft bearing 23 that secures the above with back-up ring 24 at axle head; The other end of described female rotor axle 22 is installed in the bearing support of exhaust end cap 10 rotationally by female rotor second bearing 19, female rotor the 3rd bearing 18, and puts female rotor end ring 16 again after axle head is with 17 lockings of female rotor locking nut; Described exhaust cap 15 is fixed on the right-hand member port of exhaust end cap 10 length directions.Described driver part is a permagnetic synchronous motor, this permagnetic synchronous motor comprises motor casing 2, motor bonnet 1, motor protecgulum 5, stator component 3, rotor part 4 and motor shaft 27, and described motor bonnet 1, motor protecgulum 5 are installed on the left and right end port of motor casing 2 length directions by coupling respectively; Described motor casing 2 is fixed on the air-breathing end cap 6 of compressor host parts by motor protecgulum 5; Described stator component 3 places in the die cavity of motor casing 2 and fixes with the inwall of motor casing 2; Described motor shaft 27 is directly extended and constitutes to the die cavity direction of motor casing 2 by the male rotor axle 21 of male rotor 9, and the axle head of motor shaft 27 places the bearing support of motor bonnet 1 rotationally, be that motor shaft 27 adopts same running shaft with male rotor axle 21, an end end that is close to air-breathing end cap 6 at motor shaft 27 is equipped with first oil sealing 26 that seals, second oil sealing 25, described first oil sealing 26, second oil sealing 25 is fixed in the oil sealing fitting seat of motor protecgulum 5, first oil sealing 26, second oil sealing 25 is mainly used in and prevents that body 8 interior lubricant oil from leaking outside and extraneous dust enters in the body 8, axle head end at motor shaft 27 is equipped with bearing 34, be arranged with O type circle 35 on the radially outer ring of bearing 34, play the effect of support and vibration damping, end cap 36 is installed on the motor bonnet 1 by connecting piece in the axial outside of bearing 34 again; Described rotor part 4 is installed on the motor shaft 27 and is corresponding with described stator component 3, specifically: with locking nut 32 rotor part 4 is fixed on the motor shaft 27 after being sleeved on rotor part 4 on the motor shaft 27 again; Described rotor part 4 comprises gland 28, rotor body 29, punching 30, permanent magnet 31, with fan 33, described rotor body 29 is positioned at the middle part of rotor part 4, it is to be cast as ring-type by NULL, this rotor body 29 is set on the described motor shaft 27, on the excircle of rotor body 29, be arranged with plural number piece punching 30 along its length, the elongated slot that radially offers interruption-like distribution 37 in each punching 30, the shape of elongated slot 37 is not subjected to any restriction, can be preferably regular polygon, preferred regular polygon is a rectangular in present embodiment (shown in Figure 2), the position of the elongated slot 37 in each punching 30 is corresponding, in elongated slot 37, be embedded with permanent magnet 31, be respectively arranged with gland 28 and the fan 33 that is used for fixing permanent magnet 31 at the two ends of permanent magnet 31 length directions, described fan 33 had both played the effect of fixed permanent magnet 31, played the effect that reduces the permagnetic synchronous motor temperature again.
Please continue to consult Fig. 1 and in conjunction with Fig. 2, compressor of the present invention is when work, stator component 3 energisings of permagnetic synchronous motor produce the magnetic field interaction that the permanent magnet 31 on alternating magnetic field and the rotor part 4 produces, produce torque, torque connects 9 rotations of drive male rotor by key, the rotation of male rotor 9 drives 20 rotations of the female rotor that is engaged with again, female rotor 20, the male rotor 9 rotation pressurized gas that is meshing with each other, thus make the helical-lobe compressor proper functioning.In the course of the work, in the gas medium that a large amount of lubricant oil is compressed by spraying into, play a part lubricated, cooling and reduce noise, and enter in the oily separation system, after Oil-gas Separation, cooling, filtration, recycle again with pressurized air.
The present invention is owing to adopt permagnetic synchronous motor directly to drive the direct connection driving mode of male rotor, no longer need be such as overdrive gear, belt and similar speeder, thereby make this compressor unit compactness, light and cheap, motor shaft and male rotor axle adopt same running shaft, thereby make compressor set cheap and can improve its stability.
Claims (10)
1. double-screw air compressor, comprise compressor host parts and driver part, described compressor host parts comprise body (8), male rotor (9), female rotor (20), air-breathing end cap (6), exhaust end cap (10), and exhaust cap (15), described air-breathing end cap (6), exhaust end cap (10) is separately fixed at the left side of body (8) length direction, on the right-hand member port, described male rotor (9) places in the die cavity of body (8), the two ends of male rotor (9) place the bearing support of air-breathing end cap (6) and exhaust end cap (10) respectively rotationally by male rotor axle (21), described female rotor (20) places in the die cavity of body (8) and with male rotor (9) and is meshing with each other, the two ends of female rotor (20) place the bearing support of air-breathing end cap (6) and exhaust end cap (10) respectively rotationally by female rotor axle (22), described exhaust cap (15) is fixed on the right-hand member port of exhaust end cap (10) length direction, it is characterized in that described driver part is a permagnetic synchronous motor, this permagnetic synchronous motor comprises motor casing (2), motor bonnet (1), motor protecgulum (5), stator component (3), rotor part (4), and motor shaft (27), described motor bonnet (1), motor protecgulum (5) is installed in the left side of motor casing (2) length direction respectively, on the right-hand member port, described motor casing (2) is fixed on by motor protecgulum (5) on the air-breathing end cap (6) of compressor host parts, and described stator component (3) places in the die cavity of motor casing (2) and fixes with the inwall of motor casing (2); Described motor shaft (27) is directly extended and constitutes to the die cavity direction of motor casing (2) by the male rotor axle (21) on the male rotor (9), the axle head of motor shaft (27) places the bearing support of motor bonnet (1) rotationally, and it is last and corresponding with described stator component (3) that described rotor part (4) is installed in motor shaft (27).
2. a kind of double-screw air compressor according to claim 1, it is characterized in that described rotor part (4) comprises gland (28), rotor body (29), punching (30), permanent magnet (31), and fan (33), described rotor body (29) is to be cast as ring-type by NULL, this rotor body (29) is set on the described motor shaft (27), on the excircle of rotor body (29), be arranged with plural number piece punching (30) along its length, the elongated slot that radially offers interruption-like distribution (37) in each punching (30), the position of the elongated slot (37) in each punching (30) is corresponding, in elongated slot (37), be embedded with permanent magnet (31), be respectively arranged with gland (28) and the fan (33) that is used for fixing permanent magnet (31) at the two ends of permanent magnet (31) length direction.
3. a kind of double-screw air compressor according to claim 1, it is characterized in that described motor shaft (27) is equipped with first oil sealing (26), second oil sealing (25) that seals in the end end near air-breathing end cap (6), described first oil sealing (26), second oil sealing (25) are fixed in the oil sealing fitting seat of motor protecgulum (5).
4. a kind of double-screw air compressor according to claim 1 is characterized in that described motor shaft (27) after installing rotor part (4), is fixed on rotor part (4) on the motor shaft (27) with locking nut (32).
5. a kind of double-screw air compressor according to claim 1, the axle head that it is characterized in that described motor shaft (27) places the bearing support of motor bonnet (1) rotationally by bearing (34), has additional O type circle (35) on the radially outer ring of described bearing (34).
6. a kind of double-screw air compressor according to claim 1 is characterized in that an end of described male rotor axle (21) is installed in the bearing support of air-breathing end cap (6) rotationally by male rotor clutch shaft bearing (7); The other end of described male rotor axle (21) is installed in the bearing support of exhaust end cap (10) rotationally by male rotor second bearing (11), male rotor the 3rd bearing (12), and puts male rotor end ring (14) again after axle head is with male rotor locking nut (13) locking.
7. a kind of double-screw air compressor according to claim 1, an end that it is characterized in that described female rotor axle (22) is installed in the bearing support of air-breathing end cap (6) rotationally by female rotor clutch shaft bearing (23), and the female rotor clutch shaft bearing (23) that secures the above with back-up ring (24) at axle head; The other end of described female rotor axle (22) is installed in the bearing support of exhaust end cap (10) rotationally by female rotor second bearing (19), female rotor the 3rd bearing (18), and puts female rotor end ring (16) again after axle head is with female rotor locking nut (17) locking.
8. a kind of double-screw air compressor according to claim 2 is characterized in that the regular polygon that is shaped as of the elongated slot (37) offered in the described punching (30).
9. a kind of double-screw air compressor according to claim 1 is characterized in that described body (8) and exhaust end cap (10) form for integral production.
10. a kind of double-screw air compressor according to claim 1 is characterized in that described body (8) and exhaust end cap (10) are to fix by fastening piece behind the split production.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010236962 CN101886630A (en) | 2010-07-27 | 2010-07-27 | Double-screw air compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010236962 CN101886630A (en) | 2010-07-27 | 2010-07-27 | Double-screw air compressor |
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| CN101886630A true CN101886630A (en) | 2010-11-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN 201010236962 Pending CN101886630A (en) | 2010-07-27 | 2010-07-27 | Double-screw air compressor |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102536821A (en) * | 2012-02-29 | 2012-07-04 | 大连亿斯德制冷设备有限公司 | Semi-closed screw refrigerating compressor for ammonia |
| CN103711696A (en) * | 2013-12-29 | 2014-04-09 | 大连亿莱森玛机电有限公司 | Magnetic transmission screw refrigerating compressor |
| CN104153992A (en) * | 2014-07-25 | 2014-11-19 | 温岭市鑫磊空压机有限公司 | Integral screw compressor |
| CN104204530A (en) * | 2012-02-28 | 2014-12-10 | 阿特拉斯·科普柯空气动力股份有限公司 | Screw compressor |
| CN104753254A (en) * | 2015-03-04 | 2015-07-01 | 苏州通润驱动设备股份有限公司 | Permanent magnet synchronous motor and screw rod compressor containing permanent magnet synchronous motor |
| CN106567920A (en) * | 2015-10-07 | 2017-04-19 | 阿特拉斯·科普柯空气动力股份有限公司 | Transmission and compressor device of the same |
| CN106703894A (en) * | 2016-12-30 | 2017-05-24 | 山西易通环能科技集团有限公司 | Semi-closed screw power machine for low temperature electricity generation |
| CN106939888A (en) * | 2017-04-28 | 2017-07-11 | 湖北富升智能装备股份有限公司 | The helical-lobe compressor directly driven without frame permagnetic synchronous motor |
| CN107035689A (en) * | 2017-06-08 | 2017-08-11 | 浙江德拉戈机械有限公司 | A kind of twin-screw efficient permanent magnet air compressor machine |
| CN109162927A (en) * | 2018-08-28 | 2019-01-08 | 安徽省华欣能源装备科技有限公司 | A kind of supporting arrangement of helical-lobe compressor |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104204530A (en) * | 2012-02-28 | 2014-12-10 | 阿特拉斯·科普柯空气动力股份有限公司 | Screw compressor |
| CN102536821A (en) * | 2012-02-29 | 2012-07-04 | 大连亿斯德制冷设备有限公司 | Semi-closed screw refrigerating compressor for ammonia |
| CN103711696A (en) * | 2013-12-29 | 2014-04-09 | 大连亿莱森玛机电有限公司 | Magnetic transmission screw refrigerating compressor |
| CN104153992A (en) * | 2014-07-25 | 2014-11-19 | 温岭市鑫磊空压机有限公司 | Integral screw compressor |
| CN104753254A (en) * | 2015-03-04 | 2015-07-01 | 苏州通润驱动设备股份有限公司 | Permanent magnet synchronous motor and screw rod compressor containing permanent magnet synchronous motor |
| CN106567920A (en) * | 2015-10-07 | 2017-04-19 | 阿特拉斯·科普柯空气动力股份有限公司 | Transmission and compressor device of the same |
| CN106567920B (en) * | 2015-10-07 | 2021-08-17 | 阿特拉斯·科普柯空气动力股份有限公司 | Transmission and compressor installation provided with said transmission |
| CN106703894A (en) * | 2016-12-30 | 2017-05-24 | 山西易通环能科技集团有限公司 | Semi-closed screw power machine for low temperature electricity generation |
| CN106939888A (en) * | 2017-04-28 | 2017-07-11 | 湖北富升智能装备股份有限公司 | The helical-lobe compressor directly driven without frame permagnetic synchronous motor |
| CN107035689A (en) * | 2017-06-08 | 2017-08-11 | 浙江德拉戈机械有限公司 | A kind of twin-screw efficient permanent magnet air compressor machine |
| CN109162927A (en) * | 2018-08-28 | 2019-01-08 | 安徽省华欣能源装备科技有限公司 | A kind of supporting arrangement of helical-lobe compressor |
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Open date: 20101117 |