CN203906023U - Double-split-face gearbox and multistage turbine integrated expansion unit - Google Patents
Double-split-face gearbox and multistage turbine integrated expansion unit Download PDFInfo
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- CN203906023U CN203906023U CN201420305361.2U CN201420305361U CN203906023U CN 203906023 U CN203906023 U CN 203906023U CN 201420305361 U CN201420305361 U CN 201420305361U CN 203906023 U CN203906023 U CN 203906023U
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- box
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- turbine
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Abstract
The utility model relates to a double-split-face gearbox and multistage turbine integrated expansion unit. According to the specific structure, a gearbox is provided with an upper split face and a lower split face, and three to five input shafts driven by turbines and a mechanical work output shaft are arranged on the two split faces. The turbines recycling high-pressure gas expansion work are arranged at one or two ends of each input shaft, the turbines comprise centripetal turbines or mixed-flow turbines or single-stage or multistage axial-flow type turbines, a cantilever or two-end supporting structure is adopted, the rotating speeds of the shafts can be different so that the optimal scheme of turbine air operating and overall structure design can be achieved. Shaft work generated by the turbines is transmitted to an engine or an industrial power machine through the output shaft after speed change of the gearbox. The number of the turbines is three to ten. The gearbox and multistage turbine integrated expansion unit is more compact in space arrangement, the air operating and structural design of the turbines are more flexible and reasonable, the energy utilization rate of the unit is high, the rotor dynamic characteristic is more stable, and the unit is suitable for expansion units with various expansion ratios.
Description
Technical field
The utility model relates to the multistage expansion turbine group in fluid machinery, specifically the integrated expansion unit of a kind of gear-box with two splits and multistage turbine.
Background technique
In recent years, utilize the Turbine expansion unit application of gas working medium pressure energy and heat energy very extensive, structural type is also varied, for industrial production, people's life provide electric power and power.For make per unit volume equipment high efficiency export mechanical energy as much as possible, the inlet pressure of Turbine expansion unit Working medium gas and temperature are all improving constantly, and generally adopt multistage turbine to complete the output of expansion work.When the inlet temperature of working medium is not too high, need to adopt the mode of turbine reheat in stage to promote Temperature of Working, and turbine not at the same level is integrated on same gear-box, concentrate output mechanical energy to generator or industrial dynamic power machine, make unit reach the object of compact structure, efficient output mechanical energy.
At present, gear-box type multistage expansion turbine group only has single split, single turbine type (is divided centripetal, mixed flow, axial flow three classes) and turbine supporting structure type (point cantilever type and two end supports formula), there is following shortcoming in it: one, along with improving constantly of expansion unit inlet pressure and power level, need more turbine and heat exchange progression, if adopt the scheme that more than 3 input shaft is arranged in parallel on same split, on lower velocity shaft, between gearwheel and high speed input shaft gear, need to arrange medium speed's intermediate gear, for speed change transition and transmission shaft work, the flank of tooth both sides of this intermediate gear are stressed uneven with wearing and tearing, and the impact of the high speed shaft that can be engaged with vibration, the transmission stability of this structure is poor, the design difficulty of intermediate gear is large and fragile, therefore the gear-box type expansion unit of single split is difficult to meet design requirement, two, in inflation process, the volume flowrate excursion of working medium is large, the turbine of single type can not adapt to the pneumatic design scheme of turbine, and when turbine size, weight increase or progression increases, the cantilevered support structure of turbine can not meet rotor dynamics stability requirement, therefore needs to adopt multiple turbine type and supporting structure pattern to meet the design parameter of new gear-box type multistage expansion turbine group.
For solving the structural design of gear-box type multistage expansion turbine group of working medium high inlet pressure, large flow and the demand of operation stability, the utility model proposes the integrated expansion unit of a kind of gear-box with two splits and multistage turbine.
Summary of the invention
For overcoming the shortcoming and defect of prior art, the utility model discloses the integrated expansion unit of a kind of gear-box with two splits and multistage turbine, relate to the multistage expansion turbine group in fluid machinery, this expansion unit has solved the high inlet pressure of working medium, the structural design of the gear-box type multistage expansion turbine group of large flow and the demand of operation stability, the unit that makes to expand has higher degrees of freedom in expansion sum of series turbine type selecting, pneumatic and the parameter of structure design of turbine is selected more excellent, unit operation is more steady, system effectiveness is higher, there is cost low simultaneously, the feature such as environmentally friendly, have broad application prospects.
For achieving the above object, technical solution of the present utility model is as follows:
There is the integrated expansion unit of the gear-box of two splits and multistage turbine, comprise heat exchanger before gear-box, multiple turbine and turbine, generator or industrial dynamic power machine, it is characterized in that:
--described gear-box at least comprises casing in gear-box lower box, gear-box, gear-box upper box lid, surface of contact in described gear-box lower box and gear-box between casing and in described gear-box the surface of contact between casing and gear-box upper box lid at least form two splits, split in described gear-box lower box and gear-box between casing is split under gear-box, and in described gear-box, between casing and gear-box upper box lid, split is split on gear-box; In described gear-box, arrange many input shafts and at least one output shaft; Each input shaft and output shaft all by bearing arrangement on the described upper and lower split of gear-box; Each described input shaft is delivered to output shaft by gear assembly by power;
--turbine is installed in the one or both ends of the each described input shaft of gear-box, before the suction port of each described turbine, be provided with the front heat exchanger of turbine, described multiple turbine by pipeline and turbine before heat exchanger connect successively, the output shaft of described generator or industrial dynamic power machine and gear-box is affixed.
Preferably, arrange 3～5 input shafts in described gear-box, the installable turbine of unit adds up to 3～10; Before each turbine, heat exchanger is also 3～10, but number can be not corresponding with turbine number.
Preferably, the each described split of gear-box is all set to horizontal plane, on described upper split, arrange 2 input shafts, on described lower split, arrange 2 input shafts and 1 output shaft, this output shaft is arranged on described lower split between 2 input shafts, and the gear on the each input shaft on described upper and lower split all engages with the gear on output shaft simultaneously.
Preferably, the described lower split of gear-box is set to horizontal plane, the broken line face that described upper split is protruding upward in the middle of being set to, both sides are horizontal arrangement, arranges 2 input shafts and 1 output shaft on described lower split, and this output shaft is arranged on described lower split between 2 input shafts; On described upper split, arrange 3 input shafts, wherein 1 input shaft is arranged in the projection of described upper split, and 2 input shafts are arranged in the horizontal component of described upper split; Gear on each input shaft on described upper and lower split all engages with the gear on output shaft simultaneously.
Preferably, the one or both ends of each input shaft are passed by gear housing, and one end of output shaft is passed by gear housing, and each input, output shaft are arranged in parallel.
Preferably, turbines at different levels are arranged on the one or both ends of the each input shaft of gear-box, and the gear on input shaft all engages with the gear on output shaft, and pressurized gas expansion work is passed to generator or industrial dynamic power machine by driving gearbox output shaft simultaneously.
Preferably, arrange 2 input shafts, 1 output shaft on the lower split of gear-box, one end of input shaft is passed by gear-box, and the turbine of cantilever support is installed; 2 input shafts of the same layout of upper split of gear-box, and the turbine of cantilever support is all at one end installed.
Preferably, each input, the output shaft on described upper and lower split all adopts two bearings to complete support and thrust function.
Preferably, for being arranged in the size on split and the larger turbine of weight under gear-box, adopt the structure of two end supports, its input shaft adopts three bearings.
Preferably, first each turbine that a cantilever support is installed in input shaft two ends on split on gear-box, the required bearing number of this rotating shaft is two.
Further, the upper split of gear-box is arranged 3 input shafts, has increased the 5th input shaft, and the turbine of cantilever support is installed in one end of this input shaft.
Gear-box is closed-type gear transmission, and gear, axle and bearing are all arranged in closed box, and lubricating condition is good; Gear-type is straight toothed spur gear, helical gear or herringbone tooth cylindrical gears.
The one or both ends of the each input shaft of gear-box are provided with turbine, turbine type is radial inflow, mixed-flow, single-stage or multiple axle streaming, adopts cantilever or two end supports structure, and each axle rotating speed can be different, turbine number and type are determined by overall thermal mechanics design parameter, can install 3～10.
The each rotating shaft of expansion unit needs bearing to complete support and the thrust function of turbine and gear, is arranged on the upper split or lower split of gear-box, and the every required bearing number of input shaft is 2～6; When turbine end thrust is large, composite bearing be can not meet thrust requirement time, the gear both sides in corresponding rotating shaft arrange thrust disc, part or all of end thrust are transferred on the output shaft of gear-box.
Expansion unit turbines at different levels are that directly affixed or coupling is connected with the Placement of the each input shaft of gear-box.
Between each turbine of expansion unit, be provided with inter-stage heat exchanger, heat exchanger is bushing type, shell of pipe type, plate and fin type, jacketed type, heat accumulating type, hybrid or immerse coil pipe type.
In expansion unit, the thermal source of heat exchanger comes from environment, fuel heating, industrial middle-low temperature heat, solar thermal collector, heat-stored device.
The expansion unit that the described gear-box with two splits and multistage turbine are integrated, described in it, pressurized gas working medium is air, nitrogen, oxygen, carbon dioxide, rock gas, ammonia, freon or water vapour.
On two splits of said gear case, adopting the layout of multiple input, output shaft and axle is supporting way, adapt to the structural design of different progression (3～10), type (centripetal, mixed flow, single-stage or multistage axial flow), rotating speed (3～5), size turbine, ensure feasibility, rationality and the stability of gear-box type expansion unit, and improved energy utilization efficiency.
Advantage of the present utility model and beneficial effect are:
1. expansion unit middle gear case arranges 3～5 input shafts, the turbine of 3～10 dissimilar (centripetal, mixed flow, single-stage or multistage axial flows), rotating speed can be installed, to adapt to the designing requirement of different flow, expansion ratio, make the pneumatic design of each turbine and the overall construction design of unit more flexibly, rationally, improve energy utilization efficiency and the stability of expansion unit.
2. the each rotating shaft of gear-box arranges cantilever support and two kinds of modes of two end supports, bearing adopts pure radial load bearing or with radially and the composite bearing of thrust load, when exceeding thrust bearing scope of design, end thrust, in input shaft gear both sides, thrust disc is set, to meet support and the thrust demand of large scale or large end thrust turbine.
3. gear-box has upper and lower two splits, makes 3～5 input shafts can drive 1 output shaft simultaneously, reduces influencing each other of each high speed shaft vibration, and rotor dynamics characteristic is more stable, has ensured the life-span of gear-box traveling comfort and gear.
4. before turbine entrances at different levels, heat exchanger is set, improves the energy utilization efficiency of unit, and prevent that the too low ice that occurs condensing of turbine outlet temperature from causing blocking pipeline, damaging the equipment such as turbine blade.
5. multistage turbine and gear-box are carried out integratedly, the set structure that makes to expand is compacter, and energy utilization efficiency is higher, and power to weight ratio is larger, is applicable to the expansion unit of all kinds of large expansion ratios.
Brief description of the drawings
Fig. 1 is the integrated expansion unit general arrangement structural representation of the gear-box with two splits of the present utility model and multistage turbine.
Fig. 2 is that gear-box split and each gear shaft are arranged schematic diagram (4 input shafts).
Fig. 3 is that gear-box split and each gear shaft are arranged schematic diagram (5 input shafts).
Fig. 4 (a), (b) are the A structural configuration schematic diagram of two splits of gear-box.
Fig. 5 (a), (b) are the B structural configuration schematic diagram of two splits of gear-box.
Fig. 6 (a), (b) are that the C-structure of two splits of gear-box is arranged schematic diagram.
Fig. 7 (a), (b) are the D structural configuration schematic diagram of two splits of gear-box.
Fig. 8 is embodiment's integrated morphology schematic diagram.
Embodiment
For making the purpose of this utility model, technological scheme and advantage clearer, referring to the accompanying drawing embodiment that develops simultaneously, the utility model is further described.It should be noted that, the following stated is only preferred embodiment of the present utility model, does not therefore limit protection domain of the present utility model.
As shown in Figure 1, the expansion unit that the gear-box with two splits of the present utility model and multistage turbine are integrated, comprise the front heat exchanger 3H～6H of gear-box 0, multiple turbine 3～6, multiple turbine, generator or the industrial dynamic power machine 8 with two splits, in gear-box 0, arrange 4 input shaft 3a～6a and an output shaft 8a; Each input shaft 3a～6a and output shaft 8a all by bearing arrangement on the split of gear-box 0; Each input shaft 3a～6a is delivered to output shaft 8a by gear assembly by power; Turbine 3～6 is installed in one end of each input shaft 3a～6a, before the suction port of each turbine 3～6, be provided with the front heat exchanger 3H～6H of turbine, turbine 3～6 by pipeline and turbine before heat exchanger 3H～6H connect successively, the admission line of first order turbine 3 is provided with filter 1 and valve 2, and generator or industrial dynamic power machine 8 are affixed with the output shaft 8a of gear-box 0.
Fig. 2,3 shows respectively the structure of arranging 4,5 input shafts on gear-box split.From Fig. 2,3, can find out, the gear-box 0 with two splits of the present utility model comprises casing 0b in gear-box lower box 0a, gear-box, gear-box upper box lid 0c, split 0d under surface of contact formative gear case in gear-box lower box 0a and gear-box between casing 0b, split 0e on the surface of contact formative gear case in gear-box between casing 0b and gear-box upper box lid 0c.
In embodiment shown in Fig. 2, upper split 0e, the lower split 0d of gear-box are horizontal plane, the upper layout of upper split 0e 2 input shaft 3a, the 4a of gear-box, upper 2 input shaft 5a, 6a and the output shaft 8a of arranging of lower split 0d of gear-box, input shaft 3a～6a is delivered to the gear assembly 8b on output shaft 8a by the gear assembly 3b～6b being arranged on axle by power.
In embodiment shown in Fig. 3, the described lower split 0d of gear-box is set to horizontal plane, broken line face protruding upward in the middle of upper split 0e is set to, both sides are horizontal arrangement, upper 2 input shaft 5a, 6a and the output shaft 8a of arranging of lower split 0d of gear-box, upper 3 input shaft 3a, 4a, the 7a of arranging of upper split 0e, wherein input shaft 7a is arranged in the projection of split 0e, and input shaft 3a, 4a are arranged in the horizontal component of split 0e; Input shaft 3a～7a is delivered to the gear assembly 8b on output shaft 8a by the gear assembly 3b～7b being arranged on axle by power.
The integrated morphology of embodiment's article gear-box and five turbines, as Fig. 2, Fig. 5, shown in Fig. 6 and Fig. 8: two turbines (3 installing on first input shaft, 31), first input shaft 3a of gear-box, gear 3b on first input shaft, bearing (3d on first input shaft, 3e), the turbine 4 of installing on second input shaft, second input shaft 4a of gear-box, gear 4b on second input shaft, bearing (4d on second input shaft, 4e), the turbine 5 of installing on the 3rd input shaft, the 3rd input shaft 5a of gear-box, gear 5b on the 3rd input shaft, bearing (5d on the 3rd input shaft, 5e), the turbine 6 of installing on the 4th input shaft, the 4th input shaft 6a of gear-box, gear 6b on the 4th input shaft, thrust disc 6c on the 4th input shaft, bearing (6d on the 4th input shaft, 6e, 6f), the casing 6k of fourth stage turbine, the output shaft 8a of gear-box, gear 8b on gearbox output shaft, bearing (8d on gearbox output shaft, 8e).
Gear-box 0 has two splits, and the surface of contact between lower box 0a and middle casing 0b is lower split 0d, and the surface of contact between middle casing 0b and upper box lid 0c is upper split 0e.It is upper that first input shaft 3a of gear-box, second input shaft 4a are arranged in split 0e, and it is upper that the output shaft of the 3rd input shaft 5a, the 4th input shaft 6a and gear-box is arranged in lower split 0d, and each input, output shaft are arranged in parallel.The three-dimensional structure schematic diagram of Fig. 8 combines the structural layout characteristics of Fig. 5 and Fig. 6.
First input shaft 3a two ends of gear-box are all passed by gear housing, and the radial-inward-flow turbine 3 and 31 of a cantilever structure is respectively installed, and complete axle system support and thrust function by bearing 3d and 3e.One end of second input shaft 4a is passed by gear housing, and the radial-inward-flow turbine 4 of a cantilever structure is installed, and is completed and is supported and thrust by bearing 4d and 4e.One end of the 3rd input shaft 5a is passed by gear housing, and the axial-flow turbine 5 of a cantilever structure is installed, and has bearing 5d and 5e to complete and supports and thrust.One end of the 4th input shaft 6a is passed by gear housing, the twin-stage axial-flow turbine of a two end supports structure is installed, impeller axial dimension and the weight of turbine 6 are larger, the support and the thrust function that are completed axle system by the thrust disc 6c of bearing 6d, 6e, 6f and gear 6b both sides, the casing 6k of turbine 6 can be fixed on the lower box 0a and middle casing 0b of gear-box.Output shaft 8a one end of gear-box is passed by gear housing, connecting generator or industrial dynamic power machine 8.Each bearing is pure radial load bearing or the composite bearing with thrust function, is arranged on the lower split 0d or upper split 0e of gear.
Gear 3b, 4b, 5b, 6b on the each input shaft of gear-box engage with the gear 8b on output shaft 8a, pressurized gas expansion work is passed to generator or industrial dynamic power machine 8 by driving gearbox output shaft 8a simultaneously, the rotating speed of each input, output shaft is different, fixed speed ratio.
Foregoing has completed the embodiment of two split gear-box type multistage expansion turbine groups, the upper and lower split of gear-box is arranged 4 input shafts, 1 output shaft, each axle rotating speed difference, each input shaft end is installed 5 turbines (3 radial inflows, 1 single-stage axial, 1 Double-Stage Axial Flow Water) altogether, turbine has cantilever and two kinds of support patterns of two end supports, adopt thrust disc and multiple bearing to complete support and the thrust function of axle system, met the requirement of the different overall thermal mechanics of expansion unit design parameter.
The utility model embodiment is applicable to the expansion unit of all kinds of large expansion ratios.
By above-described embodiment, realize completely effectively the purpose of this utility model.Person skilled in art is appreciated that the utility model includes but not limited to the content of describing in accompanying drawing and above embodiment.Although the utility model just thinks that practicality the most and preferred embodiment describe at present, but should know, the utility model is not limited to the disclosed embodiments, and any amendment that does not depart from function and structure principle of the present utility model all will be included in the scope of claims.
Claims (10)
1. there is the integrated expansion unit of the gear-box of two splits and multistage turbine, comprise heat exchanger before gear-box, multiple turbine and turbine, generator or industrial dynamic power machine, it is characterized in that:
--described gear-box at least comprises casing in gear-box lower box, gear-box, gear-box upper box lid, surface of contact in described gear-box lower box and gear-box between casing and in described gear-box the surface of contact between casing and gear-box upper box lid at least form two splits, split in described gear-box lower box and gear-box between casing is split under gear-box, and in described gear-box, between casing and gear-box upper box lid, split is split on gear-box; In described gear-box, arrange many input shafts and at least one output shaft; Each input shaft and output shaft all by bearing arrangement on the described upper and lower split of gear-box; Each described input shaft is delivered to output shaft by gear assembly by power;
--turbine is installed in the one or both ends of the each described input shaft of gear-box, before the suction port of each described turbine, be provided with the front heat exchanger of turbine, described multiple turbine by pipeline and turbine before heat exchanger connect successively, the output shaft of described generator or industrial dynamic power machine and gear-box is affixed.
2. expansion unit according to claim 1, is characterized in that, arranges 3～5 input shafts in described gear-box, and the installable turbine of unit adds up to 3～10; Before each turbine, heat exchanger is also 3～10, but number can be not corresponding with turbine number.
3. expansion unit according to claim 1, it is characterized in that, the each described split of gear-box is all set to horizontal plane, on described upper split, arrange 2 input shafts, on described lower split, arrange 2 input shafts and 1 output shaft, this output shaft is arranged on described lower split between 2 input shafts, and the gear on the each input shaft on described upper and lower split all engages with the gear on output shaft simultaneously.
4. expansion unit according to claim 1, it is characterized in that, the described lower split of gear-box is set to horizontal plane, broken line face protruding upward in the middle of described upper split is set to, both sides are horizontal arrangement, on described lower split, arrange 2 input shafts and 1 output shaft, and this output shaft is arranged on described lower split between 2 input shafts; On described upper split, arrange 3 input shafts, wherein 1 input shaft is arranged in the projection of described upper split, and 2 input shafts are arranged in the horizontal component of described upper split; Gear on each input shaft on described upper and lower split all engages with the gear on output shaft simultaneously.
5. according to the expansion unit described in claim 1 to 4 any one, it is characterized in that, the one or both ends of each input shaft are passed by gear housing, and one end of output shaft is passed by gear housing, and each input, output shaft are arranged in parallel.
6. according to the expansion unit described in claim 1 to 4 any one, it is characterized in that, turbines at different levels are arranged on the one or both ends of the each input shaft of gear-box, gear on input shaft all engages with the gear on output shaft, and pressurized gas expansion work is passed to generator or industrial dynamic power machine by driving gearbox output shaft simultaneously.
7. according to the expansion unit described in claim 1 to 4 any one, it is characterized in that, on the lower split of gear-box, arrange 2 input shafts, 1 output shaft, one end of input shaft is passed by gear-box, and the turbine of cantilever support is installed; 2 input shafts of the same layout of upper split of gear-box, and the turbine of cantilever support is all at one end installed.
8. expansion unit according to claim 7, is characterized in that, the each input on described upper and lower split, output shaft all adopt two bearings to complete and support and thrust function.
9. expansion unit according to claim 8, is characterized in that, for being arranged in the size on split and the larger turbine of weight under gear-box, adopts the structure of two end supports, and its input shaft adopts three bearings.
10. expansion unit according to claim 7, is characterized in that, first each turbine that a cantilever support is installed in input shaft two ends on split on gear-box, and the required bearing number of this rotating shaft is two.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420305361.2U CN203906023U (en) | 2014-06-09 | 2014-06-09 | Double-split-face gearbox and multistage turbine integrated expansion unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420305361.2U CN203906023U (en) | 2014-06-09 | 2014-06-09 | Double-split-face gearbox and multistage turbine integrated expansion unit |
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| Publication Number | Publication Date |
|---|---|
| CN203906023U true CN203906023U (en) | 2014-10-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420305361.2U Withdrawn - After Issue CN203906023U (en) | 2014-06-09 | 2014-06-09 | Double-split-face gearbox and multistage turbine integrated expansion unit |
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| CN (1) | CN203906023U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104047646A (en) * | 2014-06-09 | 2014-09-17 | 中国科学院工程热物理研究所 | Expansion unit with integration of gearbox with dual bisecting surfaces and multistage turbines |
| CN107725113A (en) * | 2017-10-31 | 2018-02-23 | 陈贤 | Two-stage cantilevered axle stream expanding machine |
-
2014
- 2014-06-09 CN CN201420305361.2U patent/CN203906023U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104047646A (en) * | 2014-06-09 | 2014-09-17 | 中国科学院工程热物理研究所 | Expansion unit with integration of gearbox with dual bisecting surfaces and multistage turbines |
| CN107725113A (en) * | 2017-10-31 | 2018-02-23 | 陈贤 | Two-stage cantilevered axle stream expanding machine |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20141029 Effective date of abandoning: 20151007 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20141029 Effective date of abandoning: 20151007 |
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| C25 | Abandonment of patent right or utility model to avoid double patenting |