CN207212415U - A kind of radial impeller for ORC TRTs - Google Patents
A kind of radial impeller for ORC TRTs Download PDFInfo
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- CN207212415U CN207212415U CN201720906576.3U CN201720906576U CN207212415U CN 207212415 U CN207212415 U CN 207212415U CN 201720906576 U CN201720906576 U CN 201720906576U CN 207212415 U CN207212415 U CN 207212415U
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- wheel disc
- orc
- trts
- radial impeller
- groove
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Abstract
The utility model belongs to Low and mid temperature heat recovery reutilization technology field, more particularly to a kind of radial impeller for ORC TRTs, wheel disc including centrally disposed mounting hole and the multiple blades being evenly arranged in the front of wheel disc, runner is formed between adjacent two blades；The back side of wheel disc is coaxially arranged with a circular groove and an annular boss from inside to outside；The aperture of mounting hole is axially sequentially reduced along wheel disc from the back side to front；Blade includes the linearly extended direct current portion radially set from the outside to the core along wheel disc and helically twisted guide part；A circumferentially positioned groove and multiple axial threaded hole are provided with around the positive mounting hole of wheel disc.Radial impeller provided by the utility model for ORC TRTs have level enthalpy drop is big, single-stage expansion than it is high the advantages of, the continual and steady operation of high workload rotating speed and big centrifugal load can be kept on wider vibration frequency band, not only efficiently but also securely and reliably.
Description
Technical field
The utility model belongs to Low and mid temperature heat recovery reutilization technology field, and in particular to one kind is used for ORC generating dresses
The radial impeller put.
Background technology
Energy-saving and emission-reduction are the inevitable choices built a resource-conserving and environment-friendly society.The recovery of industrial exhaust heat is sharp again
With the UTILIZATION OF VESIDUAL HEAT IN of the key measure for being energy-saving and emission-reduction, especially middle-low grade, have very important significance.
It is a kind of effectively low grade residual heat recovery technology that Organic Rankine Cycle (ORC), which generates electricity, and it is using organic that ORC, which generates electricity,
Working medium overheated gas replaces water vapour to promote turbine acting, but because organic working medium molecular weight is big, critical-temperature and pressure
Low, hot physical property etc. is dramatically different with conventional water vapour, so turbine design turns into the core technology for restricting ORC development.
Utility model content
In order to solve the technical problem that existing turbine restricts ORC power generation operation efficiency, the utility model provides one kind and is used for
The radial impeller of ORC TRTs.
Technical solution of the present utility model is：A kind of radial impeller for ORC TRTs, it is characterised in that：
Wheel disc including centrally disposed mounting hole and the multiple blades being evenly arranged in the front of wheel disc, structure between adjacent two blades
Into runner；The back side of the wheel disc is coaxially arranged with a circular groove and an annular boss from inside to outside；The mounting hole
Aperture be axially sequentially reduced along wheel disc from the back side to front；
The blade includes the linearly extended direct current portion radially set from the outside to the core along wheel disc and helically twisted guiding
Portion；The height of the blade radially increases successively from the outside to the core along wheel disc, and the thickness of blade is sequentially reduced from root to top, leaf
The root of piece and the front of wheel disc connect as one；
The end face that the blade is located at mounting hole side sets rounding, and chamfer radius linearly reduce from root to top；
A circumferentially positioned groove and multiple axial threaded hole are provided with around the positive mounting hole of wheel disc.
It is preferred that being provided with labyrinth teeth sealing structure on the excircle of above-mentioned annular boss, wheel is not only significantly reduced
The leakage rate of disk back side working medium, and reduce the axial thrust suffered by impeller.
It is preferred that above-mentioned blade root and wheel disc positive junction set rounding, chamfer radius along wheel disc radially
It is linear from the outside to the core to reduce, maximize the bonding strength for improving blade and wheel disc.
It is preferred that the balance pipe of an insertion wheel disc, Suo Youping are provided with runner between each two adjacent blades
Hole weigh on same circumference, and is uniformly distributed so that axial thrust ensures in a suitable scope.
It is preferred that above-mentioned balance pipe sets rounding in the exit at the wheel disc back side, it can prevent what minor radius pore area from coming
Stress raisers.
It is preferred that the quantity of blade is the integral multiple of circumferentially positioned groove and axial thread hole number sum, circumferentially positioned groove
Between being respectively positioned on two adjacent blades with axial threaded hole, it can be effectively prevented from weakening the intensity of blade.
It is preferred that shape of threads oil guide groove is provided with above-mentioned mounting hole, for effective when installing or removing radial impeller
Fill hydraulic oil in ground.
It is preferred that above-mentioned radial impeller also includes fastener, the fastener includes installation axle, pad and nut,
The installation axle is connected after sequentially passing through mounting hole and pad with nut；
The installation axle includes a taper construction section, a cylindrical section and being adapted with nut positioned at cylindrical section top
Thread segment；The outer circumference surface of the taper construction section is connected with the taper surface interference in the mounting hole；The thread segment
Outer circumference surface is connected with nut, and a keyway vertically is provided with outer circumference surface；
The pad is towards being provided with a circumferentially positioned key, the circumferentially positioned key and the circumference on the side of wheel disc
Locating slot is adapted；An axial bond, the circumferentially positioned key and the thread segment are provided with the inner periphery of the pad
Keyway is adapted.
It is preferred that several grooves are evenly arranged with the outer face of above-mentioned nut；The axial bond of the pad is towards spiral shell
Extension is provided with female direction, the extension is adapted with the groove on nut outer face.
It is preferred that the groove of above-mentioned nut is radially arranged on the outer face parallel to pad, the extension of the axial bond
Section is adapted after radially bending with the groove.
The beneficial effects of the utility model are：
(1) radial impeller provided by the utility model for ORC TRTs has that level enthalpy drop is big, single-stage expansion is than high
The advantages of, the continual and steady operation of high workload rotating speed and big centrifugal load can be kept on wider vibration frequency band, it is both high
Effect is again safe and reliable.
(2) on the one hand the utility model adds impeller intensity by setting annular boss at the back side of radial impeller,
On the other hand the intrinsic frequency of impeller can be adjusted by adjusting the positions and dimensions of annular boss, avoids impeller from occurring altogether
Shake.
(3) fastener of the radial impeller provided by the utility model for ORC TRTs can be to radial impeller
Firm axially position and radial positioning are carried out, impeller eliminates dynamic balancing detection when repeating and assembling and disassembling, has saved great amount of cost,
It is effectively improved economy.
Brief description of the drawings
Fig. 1 is the preferred embodiment 3-D view for the radial impeller that the utility model is used for ORC TRTs.
Fig. 2 is the preferred embodiment cross section view for the radial impeller that the utility model is used for ORC TRTs.
Fig. 3 is the fastener structural representation for the radial impeller that the utility model is used for ORC TRTs.
Wherein, reference is：10- radial impellers, the circumferentially positioned grooves of 11-, 12- blades, 13- wheel discs, 14- balance pipes,
15- axial threaded hole, 16- mounting holes, the sealing of 17- labyrinth teeths, 18- annular boss, 19- circular grooves, 20- installation axles, 21- cones
Shape construction section, 22- cylindrical sections, 23- thread segments, 24- keyways, 30- pads, the circumferentially positioned keys of 31-, 32- axial bonds, 40- nuts,
41- grooves, 42- nut threads hole.
Embodiment
Referring to Fig. 1-2, the preferred embodiment structure bag of the radial impeller provided by the utility model for ORC TRTs
Wheel disc 13 and multiple blades 12 are included, wheel disc 13 is provided centrally with mounting hole 16, runner is formed between adjacent two blades 12,
The aperture of mounting hole 16 is axially sequentially reduced along wheel disc 13 from the back side to front.The back side of wheel disc 13 is provided with a circular groove
19 and annular boss 18, stair-stepping annular compartment is formed when installing and using.The external diameter of wheel disc 13 is in the present embodiment
300mm。
Blade 12 includes the linearly extended direct current portion radially set from the outside to the core along wheel disc 13 and helically twisted guiding
Portion；The height of blade 12 radially increases successively from the outside to the core along wheel disc 13, and the thickness of blade 12 is sequentially reduced from root to top,
The root of blade 12 and the front of wheel disc 13 connect as one.The root of blade 12 sets rounding with the positive junction of wheel disc 13
Angle, chamfer radius are radially linearly changed into R5mm from R4mm from the outside to the core along wheel disc, and the connection for maximizing raising blade and wheel disc is strong
Degree.
A circumferentially positioned groove 11 and four axial threaded hole 15 are provided with around the positive mounting hole 16 of wheel disc, it is all
Axial threaded hole is located on same circumference.Circumferentially positioned groove 11 is used for circumferentially fixed to radial impeller progress.Axial threaded hole
15, along the axially arranged of wheel disc, facilitate the dismounting of radial impeller.Shape of threads oil guide groove is additionally provided with mounting hole 16, for pacifying
Hydraulic oil is filled when dress or dismounting radial impeller.
Blade number is 15 in the present embodiment, and the flat of insertion wheel disc is provided between the adjacent blade of each two
Weighing apparatus hole 14 so that axial thrust ensures in a suitable scope.A diameter of 4mm of balance pipe 14, the convection current of overall balance hole
Dynamic influence and technological requirement, balance pipe center are arranged in centered on impeller axis, a diameter of 75mm~80mm circle
Zhou Shang.For the stress raisers for preventing minor radius from bringing, impeller back balance pipe entrance is provided with rounding angle φ 1mm.
On the one hand the setting of annular boss 18 adds the intensity of impeller, on the other hand can be by adjusting annular boss
Positions and dimensions adjust the intrinsic frequency of impeller, avoid impeller from resonating.In the present embodiment, by finite element analysis, when
The minimum diameter of annular boss 18 takes φ 165mm~φ 175mm, and axial length takes 10mm, when radial height takes 12.5mm, impeller
Resonance meets margin of safety requirement.
Further, set labyrinth teeth to seal 17 on the excircle of annular boss 18, not only significantly reduce leakage rate,
And reduce axial thrust.In the present embodiment, by finite element analysis, when the radial clearance of labyrinth teeth is less than 0.4mm, let out
Leakage quantity and axial thrust are substantially reduced, significant sealing affection increase, and labyrinth teeth radial clearance is smaller, and sealability is stronger.
Impeller profile of the present utility model is on the basis of one-dimensional design, carries out three-dimension curved surface molded design, and blade profile is cut
Face is defined using the mean camber line mode of adding thickness, the folded three-dimensional free surface covering forming for taking non-straight burr of three-dimensional product, meridian plane type
Line then takes three rank Bezier curves to construct.The impeller of design declared working condition lower whorl week efficiency high up to 88%, impeller can be
High-efficiency operation in wider scope, meet the off design performance requirement that industrial exhaust heat utilizes.
Referring to Fig. 3, the radial impeller in the present embodiment also includes fastener, and fastener includes installation axle 20, pad
30 and nut 40, installation axle 20 be connected after sequentially passing through mounting hole 16 and pad 30 with nut 40.
Installation axle 20 includes a taper construction section 21, cylindrical section 22 and is adapted positioned at cylindrical section top with nut 40
Thread segment 23, the outer circumference surface of taper construction section 21 is that the taper surface interference that is adapted with the mounting hole of radial impeller 16 connects
Connect, a keyway 24 vertically is provided with the outer circumference surface of thread segment 23.
Pad 30 towards being provided with a circumferentially positioned key 31 on the side of impeller 10, circumferentially positioned key 31 with it is circumferentially positioned
Groove 11 is adapted.An axial bond 32 is provided with the inner periphery of pad 30, the phase of keyway 24 of axial bond 32 and thread segment 23 is fitted
Match somebody with somebody.
Fluted 41 are set on the outer face of nut 40, axial bond 32 is provided with extension on the direction towards nut,
Extension is adapted with the groove 41 on nut surface.
In the present embodiment, the groove of nut is radially arranged on the outer face parallel to pad, the extension edge of axial bond
It is adapted after bent radial with groove.
The circumferentially positioned of radial impeller is realized by the keyway connection between pad 30, impeller 10 and installation axle 20,
By controlling the screwing force of nut 40 to realize the axially position of radial impeller so that radial impeller eliminates dynamic when repeating and assembling and disassembling
Balance detection, great amount of cost is saved, be effectively improved economy.
Claims (10)
- A kind of 1. radial impeller for ORC TRTs, it is characterised in that：Wheel disc including centrally disposed mounting hole and taking turns Multiple blades that the front of disk is evenly arranged, runner is formed between adjacent two blades；The back side of the wheel disc is from inside to outside It is coaxially arranged with a circular groove and an annular boss；The aperture of the mounting hole along wheel disc axially from the back side to front according to Secondary reduction；The blade includes the linearly extended direct current portion radially set from the outside to the core along wheel disc and helically twisted guide part；Institute State the height of blade radially increases successively from the outside to the core along wheel disc, and the thickness of blade is sequentially reduced from root to top, blade Root and the front of wheel disc connect as one；A circumferentially positioned groove and multiple axial threaded hole are provided with around the positive mounting hole of wheel disc.
- 2. the radial impeller according to claim 1 for ORC TRTs, it is characterised in that：The annular boss Labyrinth teeth sealing structure is provided with excircle.
- 3. the radial impeller according to claim 2 for ORC TRTs, it is characterised in that：The root of the blade Rounding is set with the positive junction of wheel disc, chamfer radius reduce along wheel disc is radially linear from the outside to the core.
- 4. the radial impeller according to claim 3 for ORC TRTs, it is characterised in that：Each two adjacent blades Between runner in be provided with the balance pipe of an insertion wheel disc, all balance pipes are evenly arranged on same circumference.
- 5. the radial impeller according to claim 4 for ORC TRTs, it is characterised in that：The balance pipe is being taken turns The exit at the disk back side sets rounding.
- 6. the radial impeller according to claim 5 for ORC TRTs, it is characterised in that：The circumferentially positioned groove Circumferentially it is evenly arranged with axial threaded hole, the quantity of blade is the integer of circumferentially positioned groove and axial thread hole number sum Times, circumferentially positioned groove and axial threaded hole are respectively positioned between two adjacent blades.
- 7. the radial impeller according to claim 6 for ORC TRTs, it is characterised in that：Set in the mounting hole It is equipped with shape of threads oil guide groove.
- 8. according to any described radial impeller for ORC TRTs in claim 1-7, it is characterised in that：Also include Fastener, the fastener include installation axle, pad and nut, the installation axle sequentially pass through after mounting hole and pad with Nut is connected；The installation axle includes a taper construction section, a cylindrical section and the spiral shell being adapted with nut positioned at cylindrical section top Line section；The outer circumference surface of the taper construction section is connected with the taper surface interference in the mounting hole；The cylindrical section and installation Cylindrical section gap coordinates in hole；The outer circumference surface of the thread segment is connected with nut, and one is provided with outer circumference surface vertically Keyway；The pad towards being provided with a circumferentially positioned key on the side of wheel disc, the circumferentially positioned key with it is described circumferentially positioned Groove is adapted；An axial bond is provided with the inner periphery of the pad, the axial bond is circumferentially positioned with the thread segment Keyway is adapted.
- 9. the radial impeller according to claim 8 for ORC TRTs, it is characterised in that：The outer end of the nut Several grooves are evenly arranged with face；The axial bond of the pad is provided with extension on the direction towards nut, described to prolong Section is stretched to be adapted with the groove on nut outer face.
- 10. the radial impeller according to claim 9 for ORC TRTs, it is characterised in that：The groove of the nut It is radially arranged on the outer face parallel to pad, the extension of the axial bond is mutually fitted after radially bending with the groove Match somebody with somebody.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720906576.3U CN207212415U (en) | 2017-07-25 | 2017-07-25 | A kind of radial impeller for ORC TRTs |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720906576.3U CN207212415U (en) | 2017-07-25 | 2017-07-25 | A kind of radial impeller for ORC TRTs |
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| Publication Number | Publication Date |
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| CN207212415U true CN207212415U (en) | 2018-04-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201720906576.3U Active CN207212415U (en) | 2017-07-25 | 2017-07-25 | A kind of radial impeller for ORC TRTs |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107313811A (en) * | 2017-07-25 | 2017-11-03 | 航天推进技术研究院 | A kind of radial impeller for ORC TRTs |
-
2017
- 2017-07-25 CN CN201720906576.3U patent/CN207212415U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107313811A (en) * | 2017-07-25 | 2017-11-03 | 航天推进技术研究院 | A kind of radial impeller for ORC TRTs |
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