CN207261047U - High-power diesel engine waste heat recovery two-stage screw expander structure - Google Patents
High-power diesel engine waste heat recovery two-stage screw expander structure Download PDFInfo
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- CN207261047U CN207261047U CN201721023415.6U CN201721023415U CN207261047U CN 207261047 U CN207261047 U CN 207261047U CN 201721023415 U CN201721023415 U CN 201721023415U CN 207261047 U CN207261047 U CN 207261047U
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Abstract
It the utility model is related to screw expander technical field, specially a kind of high-power diesel engine waste heat recovery two-stage screw expander structure, it can effectively solve the problem that the problem of expansion ratio is small, it includes level-one housing, the level-one male rotor and level-one female rotor of cooperation are installed in the rotor chamber of the level-one housing, the level-one shell one end connects level-one air inlet end cap, it is characterized in that, described level-one housing other end connection secondary shell one end, the two level male rotor and two level female rotor of cooperation are installed in the rotor chamber of the secondary shell, connected between the level-one male rotor and the two level male rotor by shaft coupling, the secondary shell other end connects secondary exhaust end cap.
Description
Technical field
Screw expander technical field is the utility model is related to, is specially a kind of high-power diesel engine waste heat recovery two-stage
Screw expander structure.
Background technology
As the energy is increasingly in short supply and the protrusion of problem of environmental pollution, energy-saving and emission-reduction receive the concern of common people.Wherein, extensively
The general waste heat recovery applied to diesel engines of industry such as heavy-duty car, motorbus, engineering machinery, ship, generating sets is gradual
It is taken seriously.According to investigation, the heat true translation that is produced after general powerful diesel fuel burning is into effective output work
Part only accounts for 50% or so, remaining is thermal loss, wherein about 30% heat is taken away by exhaust gas, temperature is up in exhaust pipe
400 DEG C or so, this partial heat accounts for the 10% of fuel Tong,-a, and taste is higher, and it is big to recycle potentiality；About 15% heat is cooled water
Take away, but it only accounts for the 4% of fuel Tong,-a, and taste is relatively low, and it is little to recycle value；Other thermal loss account for 5%.
At present the method for most promising waste gas residual heat recycling be using the power generation of ORC organic rankine cycle systems or
Directly band dynamic load is done work, which is made of evaporator, expanding machine, condenser and working medium pump, as shown in Figure 1.Working medium is in work
After carrying out isentropic Compression in matter pump, the isobaric heating of evaporator is entered, absorbs the heat in the exhaust gas of diesel engine, and evaporation becomes
The steam of high temperature and pressure, enters constant entropy expansion in expanding machine afterwards, outwardly exports mechanical work, and the steam after expansion enters cold
Condenser, is condensed into liquid with cooling media for heat exchange and equipressure, finally reenters in working medium pump the circulation started next time.System
Overall performance includes working medium evaporating pressure, condensing pressure, working medium flow, expansion ratio, system heat recovery efficiency and total heat exchange area
Deng.
Wherein expansion ratio refers to expander inlet and exports the ratio of power pressure, its size not only affects expanded
The enthalpy drop of journey, and play an important role to the design selection of system expanding machine.In middle-size and small-size system, generally use single-stage
Expanding machine, such as scroll expansion machine, radial-inward-flow turbine formula expanding machine, such expanding machine are generally difficult to realize larger expansion ratio.
The expansion ratio of working medium increases with the increase of evaporating temperature, and amplification has the trend gradually accelerated, but in powerful diesel oil
Machine residual neat recovering system, current technology scheme are also difficult to meet the requirements.
The content of the invention
To solve the above-mentioned problems, it is swollen to provide a kind of high-power diesel engine waste heat recovery two-stage screw rod for the utility model
Swollen machine structure, it can effectively solve the problem that the problem of expansion ratio is small.
Its technical solution is such：A kind of high-power diesel engine waste heat recovery two-stage screw expander structure, it is wrapped
Level-one housing is included, the level-one male rotor and level-one female rotor of cooperation, the level-one are installed in the rotor chamber of the level-one housing
Shell one end connects level-one air inlet end cap, it is characterised in that described level-one housing other end connection secondary shell one end, described two
The two level male rotor and two level female rotor of cooperation, the level-one male rotor and two level sun are installed in the rotor chamber of level housing
Connected between rotor by shaft coupling, the secondary shell other end connects secondary exhaust end cap.
It is further characterized by, and is provided with level-one air inlet end bearing block on the level-one housing, on the secondary shell
Secondary inlet end bearing block is provided with, the level-one air inlet end bearing block is connected with the level-one air inlet end cap, and described two is grading
Gas end bearing block is connected with the level-one housing other end；
Axle envelope seat is installed on the secondary exhaust end cap；
The level-one housing tip is provided with the main oil inlet being vertically arranged, and upper end is provided with described in connection in the level-one housing
The horizontal oil duct of main oil inlet, the second oil of connection corresponding with the horizontal oil duct is provided with the secondary inlet end bearing block
Road, the horizontal oil duct are provided with the sector for connecting the level-one housing gas passage close to the secondary inlet end bearing block side
Groove；
The scalloped recess depth is 0.2-0.3mm.
After the structure of the utility model, two-stage screw expander is together in series, level-one male rotor turns with two level sun
Connected between son by shaft coupling, increase effectively expansion ratio, increase the output power of expanding machine, improve recovering energy for system
And organic efficiency；Further, horizontal oil duct is provided with connection level-one housing gas passage close to secondary inlet end bearing block side
Scalloped recess, add middle concurrent heating oil spout point, for improving the temperature of secondary inlet working medium, further improve doing for system
Function power.
Brief description of the drawings
Fig. 1 is typical ORC organic rankine cycle systems figure；
Fig. 2 is single stage screw expanding machine structure diagram；
Fig. 3 is the utility model main view to partial cutaway schematic；
Fig. 4 is the main view of level-one housing in the utility model to schematic diagram；
Fig. 5 is the main view of secondary inlet end bearing block in the utility model to schematic diagram；
Fig. 6 is concurrent heating oil spout point main view among the utility model to partial cutaway schematic；
Fig. 7 is concurrent heating oil spout point part section enlarged diagram among the utility model.
Embodiment
As shown in Fig. 3 to Fig. 7, a kind of high-power diesel engine waste heat recovery two-stage screw expander structure, it includes one
Level housing 3, the level-one male rotor 5 and level-one female rotor 6 of cooperation, level-one housing are provided with the primary rotor chamber 4 of level-one housing 3
3 one end connect level-one air inlet end cap 2 by level-one air inlet end bearing block 1, and 3 other end of level-one housing passes through secondary inlet end bearing
Seat 7 connects 8 one end of secondary shell, and two level male rotor 10 and the two level that cooperation is provided with the secondary rotor chamber 9 of secondary shell 8 are cloudy
Rotor 11, is connected between level-one male rotor 5 and two level male rotor 10 by positive coupling 14, the connection of 8 other end of secondary shell
Secondary exhaust end cap 12, is provided with axle envelope seat 13 on secondary exhaust end cap 12.
3 top of level-one housing is provided with the main oil inlet 17 being vertically arranged, and upper end is provided with the main oil inlet of connection in level-one housing 3
17 horizontal oil duct 15, the second oil duct 18 of connection corresponding with horizontal oil duct 15, horizontal oil are provided with secondary inlet end bearing block 7
Road 15 is provided with the scalloped recess 16 of 3 gas passage 19 of connection level-one housing, scalloped recess close to 7 side of secondary inlet end bearing block
16th, the plane 3-3 on level-one housing 3, the plane 7-7 on secondary inlet end bearing block 7 collectively constitute middle concurrent heating structure.
When unit works, lubricating oil enters host from main oil inlet 17, is shunted by horizontal oil duct 15, the second oil duct 18
To two level host, lubricating oil is when by scalloped recess 16, the pressure that is higher than due to the pressure of lubricating oil herein in gas passage 19
Power, so under the action of pressure difference, spirt gas passage 19 is entered two level host, then by lubricating oil together with working gas
Participate in expansion and discharge process.Sector structure can guide the injection direction of lubricating oil, and fan-shaped tail area is big, be conducive to improve
Heating effect.Meanwhile the depth of scalloped recess 16 is very shallow, stock size 0.2-0.3mm will not be to the profit in the second oil duct 18
Lubricating oil pressure produces big influence.
Shown in Fig. 2 for existing single stage screw expanding machine structure diagram.
Claims (5)
1. a kind of high-power diesel engine waste heat recovery two-stage screw expander structure, it includes level-one housing, the level-one shell
The level-one male rotor and level-one female rotor of cooperation are installed, the level-one shell one end connects level-one inlet end in the rotor chamber of body
Lid, it is characterised in that the level-one housing other end connects secondary shell one end, is provided with the rotor chamber of the secondary shell
The two level male rotor and two level female rotor of cooperation, are connected between the level-one male rotor and the two level male rotor by shaft coupling
Connect, the secondary shell other end connects secondary exhaust end cap.
2. a kind of high-power diesel engine waste heat recovery two-stage screw expander structure according to claim 1, its feature
It is, level-one air inlet end bearing block is provided with the level-one housing, secondary inlet end bearing is provided with the secondary shell
Seat, the level-one air inlet end bearing block are connected with the level-one air inlet end cap, the secondary inlet end bearing block and the level-one
The housing other end connects.
3. a kind of high-power diesel engine waste heat recovery two-stage screw expander structure according to claim 1, its feature
It is, axle envelope seat is installed on the secondary exhaust end cap.
4. a kind of high-power diesel engine waste heat recovery two-stage screw expander structure according to claim 1, its feature
It is, the level-one housing tip is provided with the main oil inlet being vertically arranged, and upper end is provided with the connection master in the level-one housing
The horizontal oil duct of oil inlet, the second oil duct of connection corresponding with the horizontal oil duct is provided with the secondary inlet end bearing block,
The horizontal oil duct is provided with the fan-shaped recessed of the connection level-one housing gas passage close to the secondary inlet end bearing block side
Groove.
5. a kind of high-power diesel engine waste heat recovery two-stage screw expander structure according to claim 4, its feature
It is, the scalloped recess depth is 0.2-0.3mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721023415.6U CN207261047U (en) | 2017-08-16 | 2017-08-16 | High-power diesel engine waste heat recovery two-stage screw expander structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721023415.6U CN207261047U (en) | 2017-08-16 | 2017-08-16 | High-power diesel engine waste heat recovery two-stage screw expander structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207261047U true CN207261047U (en) | 2018-04-20 |
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ID=61925117
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721023415.6U Active CN207261047U (en) | 2017-08-16 | 2017-08-16 | High-power diesel engine waste heat recovery two-stage screw expander structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207261047U (en) |
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2017
- 2017-08-16 CN CN201721023415.6U patent/CN207261047U/en active Active
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