CN209976582U - Four-screw expander - Google Patents
Four-screw expander Download PDFInfo
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- CN209976582U CN209976582U CN201920430681.3U CN201920430681U CN209976582U CN 209976582 U CN209976582 U CN 209976582U CN 201920430681 U CN201920430681 U CN 201920430681U CN 209976582 U CN209976582 U CN 209976582U
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Abstract
The utility model provides a four-screw expander, which comprises a shell, a male rotor arranged in the shell, and a first female rotor, a second female rotor and a third female rotor which are arranged outside the male rotor and meshed with the male rotor, wherein the first female rotor, the second female rotor and the third female rotor are in the same steering and opposite to the steering of the male rotor; and the included angle between the first female rotor and the second female rotor, between the second female rotor and the third female rotor, and between the first female rotor and the third female rotor is 120 degrees. The first female rotor, the second female rotor and the third female rotor of the utility model are arranged outside the male rotor in a 120-degree circumference manner, so that the radial force applied to the male rotor is balanced, the loading condition is greatly improved, and the output is more stable; the device can bear higher output pressure, the flow is increased by at least 2 times, and the efficiency is higher; reduced the vibrations and the noise of expander simultaneously, the utility model discloses simple structure, unit wearing and tearing have increased the life of equipment less.
Description
Technical Field
The utility model belongs to the technical field of the expander technique and specifically relates to a four screw rod expanders.
Background
The existing power equipment in the field of new energy power generation such as solar photo-thermal power generation uses a steam turbine and a screw expansion power machine. The steam turbine has high requirement on the quality of steam, and the requirement fluctuation is small, so that efficient and stable power generation can be realized, and the steam turbine is suitable for large-scale high-power units. The screw expansion power machine is suitable for the fluid of vapor-liquid two phases, has low requirement on the quality of the steam, and can still keep high power generation efficiency when the working condition of a heat source fluctuates greatly. The double-screw expansion machine is suitable for small-sized low-power generator sets, meets the requirements of a distributed generation energy microgrid system, is used as a prime motor, and is widely applied to a heat energy generation circulating device due to the advantages of high efficiency, suitability for gas-liquid two-phase working media and good self-cleaning capacity.
The existing screw expander is mainly a single screw and a double screw, and the working principle of the single screw expander is as follows: high-pressure gas or steam enters the tooth grooves in the machine to push the screw rod and the star wheel to rotate, the volume between the tooth grooves is gradually increased along with the rotation of the screw rod and the star wheel, the medium is decompressed, cooled, expanded and does work, and finally the medium is discharged from the tail end of the tooth grooves. The rotation of the screw rod can drive the generator to rotate to output power. And for the double-screw expander, the working principle is as follows: the high-pressure gas enters the tooth space volume meshed with the female screw rotor and the male screw rotor to do work by expansion, the internal energy of the high-pressure gas is converted into the kinetic energy of the rotation of the screw to be output, and the high-pressure gas is suitable for superheated or saturated steam and two-phase mixed working media. However, in both single-screw and double-screw expanders, when the pressure of gas is high, the pressure cannot be used in high-pressure occasions due to the influences of the service life and rigidity of relevant parts, and the transmission efficiency and the service life are low.
Disclosure of Invention
To the not enough of prior art, the utility model provides a four screw rod expander.
The technical scheme of the utility model is that: a four-screw expander comprises a shell, a male rotor arranged in the shell, and a first female rotor, a second female rotor and a third female rotor which are arranged outside the male rotor and meshed with the male rotor, wherein the first female rotor, the second female rotor and the third female rotor have the same rotation direction and are opposite to the rotation direction of the male rotor; and the included angle between the first female rotor and the second female rotor, between the second female rotor and the third female rotor, and between the first female rotor and the third female rotor is 120 degrees.
Furthermore, a front end cover and a rear end cover are arranged on two sides of the shell, and two ends of the male rotor, the first female rotor, the second female rotor and the third female rotor are respectively installed on the front end cover and the rear end cover through corresponding bearing seats.
Furthermore, the front end cover is also covered with a front cover.
Furthermore, a gear set is arranged between the front end cover and the front cover, and the gear set is used for ensuring the tooth clearance between the female rotor and the male rotor and transmitting torque.
Further, the gear set comprises a male rotor gear arranged on a screw rotating shaft of the male rotor, and a first female rotor gear, a second female rotor gear and a third female rotor gear arranged on screw rotating shafts of the first female rotor, the second female rotor and the third female rotor, wherein the first female rotor gear, the second female rotor gear and the third female rotor gear are all meshed with the male rotor gear, and included angles between the first female rotor gear and the second female rotor gear, between the second female rotor gear and the third female rotor gear and between the third female rotor gear and the first female rotor gear are 120 degrees.
Furthermore, the front end cover is provided with 3 air inlets, 3 air inlets are respectively communicated with corresponding air inlet channels, and 3 air inlet channels are respectively communicated with the chambers between the first female rotor, the second female rotor, the third female rotor and the male rotor.
Furthermore, the rear end cover is provided with 3 air outlets, the 3 air outlets are respectively communicated with corresponding air outlet channels, and the 3 air outlet channels are respectively communicated with the chambers between the first female rotor, the second female rotor, the third female rotor and the male rotor.
Further, corresponding sealing end covers are arranged on the shaft surfaces of the male rotor, the first female rotor, the second female rotor and the third female rotor, which are in contact with the front end cover and the rear end cover.
Furthermore, a flange coupling is further mounted on the male rotor and connected with the motor through the flange coupling.
Furthermore, the bottom end of the shell is also provided with a base.
Furthermore, a screw head cover is arranged on the screw shaft of the male rotor.
The utility model has the advantages that:
1. the first female rotor, the second female rotor and the third female rotor of the utility model are arranged outside the male rotor in a 120-degree circumference manner, so that the radial force applied to the male rotor is balanced, the loading condition is greatly improved, and the output is more stable;
2. the expander of the utility model can bear higher output pressure, the flow is increased by at least 2 times, and the efficiency is higher;
3. the utility model discloses a with the angular spread of first cloudy rotor, the cloudy rotor of second, the cloudy rotor of third according to 120, further reduced the vibrations of expander to the noise of equipment has been reduced. Meanwhile, the inertia force of a rotary part in the expansion machine is low, higher rotating speed can be obtained, and the working efficiency is improved.
4. The utility model discloses simple structure, four screw rod unit wearing and tearing are few, have further increased the life of equipment.
Drawings
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is an internal structural view of the present invention;
in the figure, 1-shell, 2-front end cover, 3-rear end cover, 4-male rotor, 5-first female rotor, 6-second female rotor, 7-third female rotor, 8-air inlet, 9-air outlet, 10-male rotor gear, 11-first female rotor gear, 12-second female rotor gear, 13-third female rotor gear, 14-screw head cover, 15-sealing end cover, 16-front cover, 17-base.
Detailed Description
The following description of the embodiments of the present invention will be made with reference to the accompanying drawings:
as shown in fig. 1 and 2, a four-screw expander includes a housing 1, a front end cap 2 and a rear end cap 3 are disposed on two sides of the housing 1, a base 17 is disposed at a lower end of the housing, and the expander is fixed by the base 17. The shell 1 is internally provided with a male rotor 4, a first female rotor 5, a second female rotor 6 and a third female rotor 7, the first female rotor 5, the second female rotor 6 and the third female rotor 7 are distributed at the outer side of the male rotor 4, the first female rotor 5, the second female rotor 6 and the third female rotor 7 are all meshed with the male rotor 4, when the expander works, the first female rotor 5, the second female rotor 6 and the third female rotor 7 rotate leftwards, the male rotor 4 rotates rightwards, the first female rotor 5, the second female rotor 6, the third female rotor 7 and the first female rotor 5 and the third female rotor 6 form an included angle of 120 degrees, so that the radial force borne by the male rotor 4 is balanced, the loading condition is greatly improved, the output is more stable, meanwhile, the expander can bear higher output pressure, the flow is increased by at least 2 times, and the efficiency is higher, and reduces the vibration of the expander, thereby reducing the noise of the expander.
Further, as shown in fig. 2, two ends of the male rotor 4, the first female rotor 5, the second female rotor 6, and the third female rotor 7 are respectively mounted on the front end cover 2 and the rear end cover 3 through corresponding bearing seats, and the front end cover 2 is further covered with a front cover 16. A gear set is arranged between the front end cover 2 and the front cover 16, and the gear set is used for ensuring the tooth clearance between the female rotor and the male rotor and transmitting torque. The gear set comprises a male rotor gear 10 arranged on a screw rotating shaft of the male rotor 4, and a first female rotor gear 11, a second female rotor gear 12 and a third female rotor gear 13 arranged on screw rotating shafts of the first female rotor 5, the second female rotor 6 and the third female rotor 7, wherein the first female rotor gear 11, the second female rotor gear 12 and the third female rotor gear 13 are all meshed with the male rotor gear 10, and the included angles between the first female rotor gear 11 and the second female rotor gear 12, between the second female rotor gear 12 and the third female rotor gear 13, and between the third female rotor gear 13 and the first female rotor gear 11 are also 120 degrees.
Furthermore, 3 air inlets 8 are arranged on the front end cover 2, 3 air inlets 8 are respectively communicated with corresponding air inlet channels, and 3 air inlet channels are respectively communicated with chambers between the first female rotor 5, the second female rotor 6, the third female rotor 7 and the male rotor 4. Correspondingly, 3 air outlets 9 are arranged on the rear end cover 3, the 3 air outlets 9 are respectively communicated with corresponding air outlet channels, and the 3 air outlet channels are respectively communicated with the chambers between the first female rotor 5, the second female rotor 6, the third female rotor 7 and the male rotor 4.
Further, the axial surfaces of the male rotor 4, the first female rotor 5, the second female rotor 6 and the third female rotor 7, which are contacted with the front end cover 2 and the rear end cover 3, are provided with corresponding sealing end covers 15. And a screw head cover 14 is also arranged on the screw rotating shaft of the male rotor 4. And a flange coupling is also arranged on the male rotor 4 and is connected with the motor through the flange coupling.
The working principle is as follows: hot water, water vapor or water vapor mixed fluid with certain temperature and pressure enters an air inlet channel in the front end cover 2 through the 3 air inlets 8 and then enters an outlet groove of the male rotor 4, the cavities of the female rotor and the male rotor are gradually enlarged, and the steam or the hot water is cooled, depressurized, expanded and worked to push the female rotor and the male rotor to rotate. The steam or hot water which does work is discharged from the outlet channel below the rear end cover. The power is output from the output end of the male rotor 4, and can drive equipment such as a water pump or a generator and the like. Through being provided with three inlet channel, the volume of admitting air increases the twice, and screw rod expander does work and increases the twice also, and the power of final output also increases the twice correspondingly.
The foregoing embodiments and description have been provided to illustrate the principles and preferred embodiments of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which fall within the scope of the invention as claimed.
Claims (10)
1. A four-screw expander is characterized in that: the rotor comprises a shell, a male rotor arranged in the shell, and a first female rotor, a second female rotor and a third female rotor which are arranged outside the male rotor and meshed with the male rotor, wherein the first female rotor, the second female rotor and the third female rotor have the same rotation direction and are opposite to the rotation direction of the male rotor; and the included angle between the first female rotor and the second female rotor, between the second female rotor and the third female rotor, and between the first female rotor and the third female rotor is 120 degrees.
2. A four screw expander as claimed in claim 1, wherein: the two sides of the shell are also provided with a front end cover and a rear end cover, and the two ends of the male rotor, the two ends of the first female rotor, the two ends of the second female rotor and the two ends of the third female rotor are respectively arranged on the front end cover and the rear end cover through corresponding bearing seats.
3. A four screw expander according to claim 2, wherein: the front end cover is also covered with a front cover.
4. A four screw expander according to claim 3, wherein: a gear set is arranged between the front end cover and the front cover, and the gear set is used for ensuring the tooth clearance between the female rotor and the male rotor and transmitting torque.
5. The four-screw expander according to claim 4, wherein: the gear set comprises a male rotor gear arranged on a screw rotating shaft of the male rotor, and a first female rotor gear, a second female rotor gear and a third female rotor gear arranged on screw rotating shafts of the first female rotor, the second female rotor and the third female rotor, wherein the first female rotor gear, the second female rotor gear and the third female rotor gear are all meshed with the male rotor gear, and included angles between the first female rotor gear and the second female rotor gear, between the second female rotor gear and the third female rotor gear and between the third female rotor gear and the first female rotor gear are 120 degrees.
6. A four screw expander according to claim 2, wherein: the front end cover is provided with 3 air inlets, the 3 air inlets are respectively communicated with corresponding air inlet channels, and the 3 air inlet channels are respectively communicated with a cavity between the first female rotor, the second female rotor, the third female rotor and the male rotor.
7. A four screw expander according to claim 2, wherein: the rear end cover is provided with 3 air outlets, the 3 air outlets are respectively communicated with corresponding air outlet channels, and the 3 air outlet channels are respectively communicated with a cavity between the first female rotor, the second female rotor, the third female rotor and the male rotor.
8. A four screw expander according to claim 2, wherein: and corresponding sealing end covers are arranged on the shaft surfaces of the male rotor, the first female rotor, the second female rotor and the third female rotor, which are contacted with the front end cover and the rear end cover.
9. A four screw expander according to claim 8, wherein: and a screw head cover is also arranged on the screw rotating shaft of the male rotor.
10. A four screw expander as claimed in claim 1, wherein: the bottom end of the shell is also provided with a base.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920430681.3U CN209976582U (en) | 2019-04-01 | 2019-04-01 | Four-screw expander |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920430681.3U CN209976582U (en) | 2019-04-01 | 2019-04-01 | Four-screw expander |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209976582U true CN209976582U (en) | 2020-01-21 |
Family
ID=69256234
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920430681.3U Expired - Fee Related CN209976582U (en) | 2019-04-01 | 2019-04-01 | Four-screw expander |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209976582U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109944641A (en) * | 2019-04-01 | 2019-06-28 | 五邑大学 | A kind of four screw expanders |
-
2019
- 2019-04-01 CN CN201920430681.3U patent/CN209976582U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109944641A (en) * | 2019-04-01 | 2019-06-28 | 五邑大学 | A kind of four screw expanders |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200121 Termination date: 20210401 |
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| CF01 | Termination of patent right due to non-payment of annual fee |