CN209704638U - A kind of tandem single-screw expander group and power generator - Google Patents
A kind of tandem single-screw expander group and power generator Download PDFInfo
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- CN209704638U CN209704638U CN201920370221.6U CN201920370221U CN209704638U CN 209704638 U CN209704638 U CN 209704638U CN 201920370221 U CN201920370221 U CN 201920370221U CN 209704638 U CN209704638 U CN 209704638U
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Abstract
The utility model relates to a kind of tandem single-screw expander group and power generator, including the first single-screw expander (1), second single-screw expander (2), first shaft coupling (3), second shaft coupling (4) and pipeline (6), first single-screw expander (1) and the second single-screw expander (2) pass through first shaft coupling (3) differential concatenation, second single-screw expander (2) is connect by second shaft coupling (4) with generator (5), pipeline (6) is connected to the first single-screw expander (1) and the second single-screw expander (2).Single-screw expander quantity is generally only one in the prior art, the deficiency that there are energy conversion efficiencies is low, system is unstable and working speed is excessively high, this expansion unit is using the segmentation expansion of multimachine differential concatenation, the enthalpy drop ratio that single expanding machine can be reduced improves the energy conversion efficiency and stability and economy of system.
Description
Technical field
The utility model relates to single-screw expander technical fields, are a kind of tandem single-screw expander groups specifically
And power generator.
Background technique
The waste heat overbottom pressure of China's industry is resourceful, and extensive Chong Huaxing industrial production enterprise has been carried out utilization, but by
In the limitation of expanding machine technology, the small-scale waste heat overbottom pressure resource of the distributing being widely present is not used effectively also.
Single-screw expander is as a kind of new device for converting heat energy into mechanical energy, mainly by star-wheel, screw rod, screw rod
Axis and casing are constituted.Compared to traditional steam turbine, the structurally simple, economical property of single-screw expander is good, high reliablity, installs dimension
Repair conveniently, stress balance it is good, it is high pressure resistant, be easy to Miniaturization Design, be recycle the small-scale waste heat overbottom pressure resource of distributing reason
Think device.But in technical solution of the existing single-screw expander for waste heat overbottom pressure resource reclaim, single-screw expander
Quantity is generally one, and the prior art has that excessive single machine expansion ratio, low efficiency, working speed are excessively high, affects remaining
High efficiency, stability and the economy of hot overbottom pressure resource reclaim.Therefore, it is necessary to based on being expanded in the prior art using single screw rod
The technical issues of machine, improves, improve waste heat overbottom pressure resource utilization efficiency, combine expander system stability and
Economy.
Utility model content
The technical problem to be solved by the present invention is to provide a kind of energy conversion efficiency is higher, stability is more preferable and warp
Ji property more preferably single-screw expander group.
To solve the above problems, the utility model provides a kind of tandem single-screw expander group, including the first single screw rod
Expanding machine 1, the second single-screw expander 2, first shaft coupling 3, second shaft coupling 4, pipeline 6, the first single-screw expander 1 and
Two single-screw expanders 2 pass through second shaft coupling 4 and power generation by 3 differential concatenation of first shaft coupling, the second single-screw expander 2
Machine 5 connects, and pipeline 6 is connected to the first single-screw expander 1 and the second single-screw expander 2.
First single-screw expander 1 includes the first casing 11, the first star-wheel 12, the first screw rod 13 and the first screw shaft 14,
Wherein, the first star-wheel 12 is distributed in 13 two sides of the first screw rod, and the first screw rod 13 is intermeshed and is mounted on the first star-wheel 12
In first casing 11；Second single-screw expander 2 includes the second casing 21, the second star-wheel 22, the second screw rod 23 and the second screw rod
Axis 24, wherein the second star-wheel 22 is distributed in 23 two sides of the second screw rod, and the second screw rod 23 is intermeshed and pacifies with the second star-wheel 22
In the second casing 22.
The side of first casing 11 is provided with the first single-screw expander air inlet 111, and the other side of the first casing 11 is provided with
First single-screw expander gas outlet 112.The side of second casing 21 is provided with the second single-screw expander air inlet 211, and second
The other side of casing 21 is provided with the second single-screw expander gas outlet 212.Pipeline 6 respectively with the first single-screw expander gas outlet
112 and second single-screw expander air inlet 211 be tightly connected.
First screw shaft, 14 both ends are respectively the first screw shaft input terminal 141 and the first screw shaft output end 142, and second
24 both ends of screw shaft are respectively the second screw shaft input terminal 241 and the second screw shaft output end 242.First screw shaft output end
142 are docked with the second screw shaft input terminal 241 by the first shaft coupling 3.
Since the new technical solution that the utility model is taken is that multiple single-screw expanders are cascaded, can make remaining
Hot overbottom pressure gas segmentation expansion, reduces the expansion ratio of each single machine, each single machine can be made in the state closer to isentropic enthalpy drop ratio
Lower work improves the efficiency that thermal energy is converted into mechanical energy.Single machine expansion ratio reduces, and can also greatly reduce gas flow rate, change
Kind flow behavior, reduces the flow losses of gas.Since single-screw expander is positive-displacement expansion engine, volume flow, which is proportional to, to be turned
Speed is connected using multimachine after being segmented expansion, and single machine expansion ratio reduces, and casing internal volume flow reduces therewith, therefore each single spiral shell
The revolving speed of screw rod and star-wheel revolute pair in bar expanding machine casing reduces, and is conducive to the service life for improving bearing and sealing element,
System stability enhancing；In addition, being expanded when conversion has the waste heat overbottom pressure gas of energy as much using tandem single screw rod
The scheme of unit is compared with the scheme that a single-screw expander is used only, the screw shaft output end that connect with generator input terminal
Revolving speed can be greatly reduced, can be under conditions of not needing deceleration mechanism through shaft coupling and generator direct connection, and economy is more
It is good.
As a kind of perferred technical scheme, first shaft coupling and second shaft coupling and by other single-screw expander strings
The shaft coupling being linked togather is plum-blossom type elastic coupling.Plum-blossom type elastic coupling is with certain elasticity and has slow
The function of punching property compensation displacement, can reduce the installation requirement of tandem single-screw expander group, as connector convenient for setting
Standby care and maintenance.
As a kind of perferred technical scheme, duct coupling is heat preservation connecting tube.It can be reduced using heat preservation connecting tube remaining
Heat loss of the hot overbottom pressure gas in pipeline flow process.
The content of the utility model further includes a kind of industrial exhaust heat top pressure power generation dress containing above-mentioned single-screw expander group
It sets.The waste heat overbottom pressure of China's industry is resourceful, and in extensive Chong Huaxing industrial production, enterprise has been carried out utilization, still, right
In the small-scale waste heat overbottom pressure resource of distributing being widely present, since the limitation of expanding machine technology is not used effectively also.Using
Tandem single-screw expander group and power generator provided by the utility model can be used for the small-scale waste heat overbottom pressure resource of distributing
Effective use, supplemented in the small-scale waste heat overbottom pressure utilization of resources field of distributing, the deficiency of expanding machine technology.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of tandem single-screw expander；
Fig. 2 is a kind of pipe link relation schematic diagram of tandem single-screw expander.
Appended drawing reference involved in attached drawing and component part are as follows:
First single-screw expander 1, the second single-screw expander 2, first shaft coupling 3, second shaft coupling 4, generator 5,
Pipeline 6, the first casing 11, the first star-wheel 12, the first screw rod 13, the first screw shaft 14, the first screw shaft input terminal 141, first
Screw shaft output end 142, the second casing 21, the second star-wheel 22, the second screw rod 23, the second screw shaft 24, the input of the second screw shaft
Hold the 241, second screw shaft output end 242, the first single-screw expander air inlet 111, the first single-screw expander gas outlet
112, the second single-screw expander air inlet 211, the second single-screw expander gas outlet 212.
Specific embodiment
Fig. 1, the first embodiment Fig. 2 shows the utility model.
Embodiment 1
As shown in Figure 1, a kind of tandem single-screw expander group, including the first single-screw expander 1, the second single screw rod are swollen
Swollen machine 2, first shaft coupling 3, second shaft coupling 4, pipeline 6.First single-screw expander 1 and the second single-screw expander 2 pass through
3 differential concatenation of first shaft coupling, the second single-screw expander 2 are connect by second shaft coupling 4 with generator 5.First single screw rod
Expanding machine 1 includes the first casing 11, the first star-wheel 12, the first screw rod 13 and the first screw shaft 14, wherein the distribution of the first star-wheel 12
In 13 two sides of the first screw rod, and the first screw rod 13 and the first star-wheel 12 are intermeshed and are mounted in the first casing 11.Second is single
Screw expander 2 includes the second casing 21, the second star-wheel 22, the second screw rod 23 and the second screw shaft 24, wherein the second star-wheel
22 are distributed in 23 two sides of the second screw rod, and the second screw rod 23 and the second star-wheel 22 are intermeshed and are mounted in the second casing 22.
The side of first casing 11 is provided with the first single-screw expander air inlet 111, and the other side of the first casing 11 is provided with first single spiral shell
Bar expanding machine gas outlet 112.The side of second casing 21 is provided with the second single-screw expander air inlet 211, the second casing 21
The other side is provided with the second single-screw expander gas outlet 212.First screw shaft, 14 both ends are respectively the first screw shaft input terminal 141
With the first screw shaft output end 142,24 both ends of the second screw shaft are respectively the second screw shaft input terminal 241 and the second screw shaft
Output end 242.First screw shaft output end 142 is docked with the second screw shaft input terminal 241 by first shaft coupling 3.
As shown in Fig. 2, pipeline 6 is connected to the first single-screw expander 1 and the second single-screw expander 2.Specific connection type
For pipeline 6 is tightly connected with the first single-screw expander gas outlet 112 and the second single-screw expander air inlet 211 respectively.
The tandem single-screw expander group is applied to industrial exhaust heat top pressure power generation.
When the tandem single-screw expander runs well, the waste heat gas of high temperature and pressure passes through the first single-screw expander
Air inlet 111 enters expansion in the first casing 11, drives screw rod rotation acting, then passes through the first single-screw expander exhaust outlet
112 enter expansion work in the second casing 21 by the second single-screw expander air inlet 211 via heat preservation connecting pipe 6, will
Thermal energy is converted into the mechanical energy of the second screw shaft 24, and mechanical energy is passed to generator again by the second screw shaft output end 242, power generation
Mechanical energy is converted electric energy by machine, and residual gas is by completing waste heat outside 212 discharge system of the second single-screw expander exhaust outlet
The conversion of overbottom pressure resource.
Since the new technical solution that the present embodiment 1 is taken is to expand the first single-screw expander 1 and the second single screw rod
Machine 2 is cascaded, and can make the segmentation expansion of waste heat overbottom pressure gas, reduce the first single-screw expander 1 and the second single screw rod is swollen
The expansion ratio of swollen machine 2 can work in the state of closer to isentropic enthalpy drop ratio, improve the effect that thermal energy is converted into mechanical energy
Rate.Single machine expansion ratio reduces, and can also greatly reduce gas flow rate, then improve flow behavior, reduces the flowing damage of gas
It loses.Since single-screw expander is positive-displacement expansion engine, volume flow is proportional to revolving speed, is connected after being segmented expansion using multimachine,
Single machine expansion ratio reduces, and casing internal volume flow reduces therewith, therefore the first star-wheel 12, the first screw rod in the first casing 11
13, the revolving speed reduction of the second star-wheel 22 in the first screw shaft 14 and the second casing 21, the second screw rod 23, the second screw shaft 24,
Be conducive to improve the service life of bearing and sealing element, system stability enhancing；In addition, having as much more than energy in conversion
When hot overbottom pressure gas, the scheme using tandem single-screw expander group and the scheme phase using only a single-screw expander
Than the revolving speed of the second screw shaft output end 242 can be greatly reduced, and can pass through second under conditions of not needing deceleration mechanism
Axis device 4 and 5 direct connection of generator, economy are more preferable.
Embodiment 2
A kind of industrial exhaust heat excess pressure power generating device, including single-screw expander group described in embodiment 1.
The embodiments of the present invention is elaborated above in conjunction with attached drawing, but the utility model is not limited to
Above embodiment can also make many variations to it within the knowledge of one of ordinary skill in the art.
For example, there was only two single-screw expander strings of the first single-screw expander and the second single-screw expander in the above-described embodiment
Connection, it is clear that a kind of technical solution of tandem single-screw expander group described in the utility model can be applicable to 3 or more
The situation that is sequentially connected in series of single-screw expander.
Claims (9)
1. a kind of single-screw expander group, including the first single-screw expander (1), the second single-screw expander (2), the first shaft coupling
Device (3), second shaft coupling (4), generator (5), pipeline (6), which is characterized in that the first single-screw expander (1) and the second list
Screw expander (2) by first shaft coupling (3) differential concatenation, the second single-screw expander (2) by second shaft coupling (4) with
Generator (5) connection, pipeline (6) are connected to the first single-screw expander (1) and the second single-screw expander (2).
2. single-screw expander group according to claim 1, which is characterized in that the first single-screw expander (1) packet
Include the first casing (11), the first star-wheel (12), the first screw rod (13), with the first screw shaft (14), wherein the first star-wheel (12) point
Cloth is in the first screw rod (13) two sides, and the first screw rod (13) and the first star-wheel (12) are intermeshed and are mounted on the first casing (11)
It is interior；Second single-screw expander (2) includes the second casing (21), the second star-wheel (22), the second screw rod (23) and the second spiral shell
Bar axis (24), wherein the second star-wheel (22) is distributed in the second screw rod (23) two sides, and the second screw rod (23) and the second star-wheel (22)
It is intermeshed and is mounted in the second casing (21).
3. single-screw expander group according to claim 2, which is characterized in that the side of first casing (11) is provided with
The other side of first single-screw expander air inlet (111), first casing (11) is provided with the first single-screw expander outlet
Mouth (112)；The side of second casing (21) is provided with the second single-screw expander air inlet (211), second casing
(21) the other side is provided with the second single-screw expander gas outlet (212).
4. single-screw expander group according to claim 3, which is characterized in that the pipeline (6) is respectively with described first
Single-screw expander gas outlet (112) and the second single-screw expander air inlet (211) are tightly connected.
5. single-screw expander group according to claim 2, which is characterized in that the first screw shaft (14) both ends difference
For the first screw shaft input terminal (141) and the first screw shaft output end (142), the second screw shaft (24) both ends are respectively
Two screw shaft input terminals (241) and the second screw shaft output end (242).
6. single-screw expander group according to claim 5, which is characterized in that the first screw shaft output end (142)
It is docked with the second screw shaft input terminal (241) by the first shaft coupling (3).
7. single-screw expander group according to claim 1, which is characterized in that the first shaft coupling (3) and described
Two shaft couplings (4) are plum-blossom type elastic coupling.
8. single-screw expander group according to claim 1, it is characterised in that the pipeline (6) is heat preservation duct coupling.
9. a kind of industrial exhaust heat excess pressure power generating device, which is characterized in that including single spiral shell described in claim 1 to 8 any one
Bar expands unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920370221.6U CN209704638U (en) | 2019-03-22 | 2019-03-22 | A kind of tandem single-screw expander group and power generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920370221.6U CN209704638U (en) | 2019-03-22 | 2019-03-22 | A kind of tandem single-screw expander group and power generator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209704638U true CN209704638U (en) | 2019-11-29 |
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ID=68647346
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920370221.6U Active CN209704638U (en) | 2019-03-22 | 2019-03-22 | A kind of tandem single-screw expander group and power generator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209704638U (en) |
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2019
- 2019-03-22 CN CN201920370221.6U patent/CN209704638U/en active Active
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