CN207485490U - A kind of Organic Rankine Cycle multikilowatt power generator - Google Patents

Abstract

The utility model is related to a kind of Organic Rankine Cycle multikilowatt power generator, including radial-inward-flow turbine, reduction box, shaft coupling and generator；The high speed shaft of reduction box is directly connected to radial-inward-flow turbine, and the slow-speed shaft of reduction box is connect by shaft coupling with generator；Its improvements is：The radial-inward-flow turbine includes spiral case, impeller, nozzle blade cascade, seal casinghousing and sealing system；Seal casinghousing is fixedly mounted on reduction box, and spiral case is mounted on by bolt on seal casinghousing；Impeller is located inside spiral case and is fixedly mounted on the high speed shaft of reduction box；Nozzle blade cascade is installed in the channel that spiral case is formed with seal casinghousing；Nozzle blade cascade is for annular and on the excircle of impeller.The purpose of this utility model is that making power unit system compact, efficient, reliable, while accomplish zero leakage of organic working medium.

Description

A kind of Organic Rankine Cycle multikilowatt power generator

Technical field

The utility model belongs to organic working medium technical field of power generation, and in particular to a kind of Organic Rankine Cycle multikilowatt power generation Device.

Background technology

High temperature waste heat is substantially achieved and makes full use of in industrial production at present, but less than 200 DEG C of low temperature exhaust heat but because For it is dispersed strong, grade is low, quantity is small etc., and reasons can not use conventional steam turbine technology to carry out recycle.Organic Rankine follows Ring replaces water, using the characteristic of organic working medium low boiling point, can be produced under relatively low heat source temperature as medium using organic working medium The raw saturation of elevated pressures or low overheat steam, acting power generation.Organic Rankine Cycle (ORC) can utilize low-temperature flue gas, heat Water, saturated vapor, conduction oil heat generate electricity.Organic Rankine Cycle technology has been applied to recycle industrial exhaust heat hair at present The fields such as low-temperature heat power generation, geothermal power generation, biomass power generation and the power generation of gas turbine internal combustion engine cascade utilization in electricity, solar energy.

Main two big type of expanding machine in present Organic Rankine Cycle power generator：Displacement type expander and velocity profile are swollen Swollen machine.The general output power of displacement type expander is small, efficiency is low, is chiefly used in below 100kW microminiature ORC systems.Velocity profile is swollen It the advantages of swollen equipment high efficiency, high expansion ratio, big enthalpy drop, has a clear superiority in large and medium-sized ORC system.

Velocity profile expanding machine is to change the fluid of high temperature and pressure being changed into using the flow area of nozzle and impeller channel High-velocity fluid pushes impeller rotation output mechanical work, is divided into two kinds of axial-flow turbine and radial-inward-flow turbine.Wherein axial-flow turbine is due to list The grade small flow of pressure ratio is big, and multistage leaf grating is generally required in ORC, causes machine packet size larger, complicated, radial-inward-flow turbine has The advantages that efficient, compact-sized, high expansion ratio, big enthalpy drop.

Utility model content

In view of the deficiencies of the prior art, the utility model provides a kind of towards multikilowatt low-temperature heat source cogeneration field Organic working medium radial-inward-flow turbine power generator, it is therefore intended that make power unit system compact, efficient, reliable, while accomplish organic Zero leakage of working medium.

The specific technical solution of the utility model is：

The utility model provides a kind of Organic Rankine Cycle multikilowatt power generator, including radial-inward-flow turbine, reduction box, shaft coupling Device and generator；The high speed shaft of reduction box is directly connected to radial-inward-flow turbine, and the slow-speed shaft of reduction box passes through shaft coupling and power generation Machine connects；

Its improvements is：

The radial-inward-flow turbine includes spiral case, impeller, nozzle blade cascade, seal casinghousing and sealing system；

Seal casinghousing is fixedly mounted on reduction box, and spiral case is mounted on by bolt on seal casinghousing；Impeller is located at spiral case It is internal and be fixedly mounted on the high speed shaft of reduction box；Nozzle leaf is installed in the channel that spiral case is formed with seal casinghousing Grid；Nozzle blade cascade is for annular and on the excircle of impeller；

Sealing system include Double End contacting mechanical seal component, resistance oil sealing petrol station, throttle valve, overflow valve, flowmeter, Annular seal space temperature sensor, annular seal space pressure sensor, charge oil pressure sensor, fuel and vapor separator, gas-drying apparatus, resistance oil sealing Supply and recovery pipe；

The Double End contacting mechanical seal component is mounted on the high speed shaft of reduction box and in seal casinghousing Portion；Resistance oil sealing oil-feed port and resistance oil sealing oil return opening are offered on seal casinghousing；Oil sealing oil-feed port is hindered by hindering oil sealing supply line It is connected with resistance oil sealing petrol station；Resistance oil sealing oil return opening is connected by hindering oil sealing recovery pipe with resistance oil sealing petrol station；

Annular seal space pressure sensor and annular seal space temperature sensor are installed on the seal casinghousing；

Hinder installation overflow valve, flowmeter, charge oil pressure sensor on oil sealing supply line；It is installed in resistance oil sealing recovery pipe Throttle valve.

In order to be detached, then organic working medium is recycled to organic working medium and resistance oil sealing, which further includes Working medium recovery pipe；Working medium and resistance oil sealing mixture floss hole are offered on seal casinghousing；Pure working medium is provided on spiral case to return It closes up；Working medium recovery pipe has been connected between working medium and resistance oil sealing mixture floss hole and pure working medium recovery port；Working medium is returned Fuel and vapor separator and gas-drying apparatus are installed successively along the flow direction of organic working medium in closed tube road.

In order to the lubricating oil recycling in the resistance oil sealing and gear-box in turbine.The system further includes lubricating oil and returns Closed tube road and oil recycling storage tank；Lubricating oil recovery port is further opened on gear box casing；Lubricating oil recovery pipe is connected to oil It recycles between storage tank and lubricating oil recovery port.

Specifically, multiple leaves that impeller includes the wheel disc of centrally disposed mounting hole and is evenly arranged in the front of wheel disc Piece forms runner between adjacent two blades；The back side of the wheel disc be coaxially disposed from inside to outside there are one circular groove and One annular convex platform；The aperture of the mounting hole is sequentially reduced along wheel disc is axial 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 successively increases 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 are connected as one；

There are one circumferentially positioned slot and multiple axial threaded hole for setting around the positive mounting hole of wheel disc；Above-mentioned annular convex platform Excircle on setting labyrinth teeth seal, not only significantly reduce leakage rate, but also reduce axial thrust.

Preferably, the root of above-mentioned blade and the positive junction setting rounded corner of wheel disc, chamfer radius line from inside to outside Property reduce, maximize the bonding strength for improving blade and wheel disc.

Preferably, being respectively provided between the adjacent blade of each two there are one the balance hole of perforation wheel disc, the balance hole exists It is uniformly distributed on same circumference so that axial thrust ensures in a suitable range.

Preferably, above-mentioned balance hole sets rounded corner, the office that can prevent minor radius from bringing in the exit at the wheel disc back side Portion's stress concentration.

Preferably, the quantity of blade is the integral multiple of the sum of circumferentially positioned slot and axial thread hole number, circumferentially positioned slot Between being respectively positioned on two adjacent blades with threaded hole, it can be effectively prevented from weakening the intensity of blade.Above-mentioned wheel hub is parallel to wheel A circumferentially positioned slot and multiple threaded holes are along the circumferential direction evenly arranged on the outer end face of disk；The circumferentially positioned slot edge wheel The radial direction perforation setting of hub, circumferential position are generally taken among runner exit, radial impeller are carried out for preferably circumferential solid It is fixed, ensure that impeller circumferential direction installation site is constant during being dismounted for multiple times；The threaded hole is set along the axial direction of wheel hub, facilitates tearing open for impeller Dress.

Preferably, be provided with shape of threads oil guide groove on medial surface where the mounting hole of above-mentioned wheel hub, in installation or Hydraulic oil is filled when dismantling radial impeller.

Specifically, nozzle blade cascade includes forepart shroud, back chassis and multiple guide vanes；Forepart shroud and back bottom Disk is arranged in parallel, and multiple guide vanes are evenly distributed in the circumferential direction between forepart shroud and back chassis；The forepart shroud Sealing ring is installed between spiral case；The back chassis is positioned with seal casinghousing by along the circumferential direction uniformly distributed multiple pins It is connected with screw；Guide vane number and impeller blade number are relatively prime；The guide vane is transonic airfoil prismatic blade.

Specifically, above-mentioned spiral case includes spiral case chamber, internal stiffeners and outlet diffuser pipe；The spiral case chamber is cut Face is circle, and center of circle busbar is eccentric screw line, and area of section streamwise is gradually reduced；The internal stiffeners are multiple And it is uniformly mounted between spiral case chamber outlet and the guide vane；The internal stiffeners are symmetrical template, and import is semicircle Shape, outlet are located on anchor ring；The internal stiffeners at the cut water arrange, be 46 ° with radial direction angle；The reinforcement Muscle number is the half or a quarter of guide vane number；The outlet diffuser pipe is connected with spiral case chamber and and volute chamber The working medium entrances direction of room is mutually perpendicular to.

The utility model has the advantage of：

1st, the utility model takes a series of modular designs to carry out frequency modulation anti-vibrations, spiral case at the working medium entrances pipe cloth Reinforcing rib is put, the air-flow weakened using guide functions at working medium entrances pipe is uneven；Guide vane number and impeller blade number are relatively prime, Weaken impeller inlet gas, reduce the dynamic stress of impeller；Movable vane piece blade profile takes untuned to design；Impeller axle is designed as just Property axis.The utility model is from weakening flow-induced vibration, avoid excited frequency, reduce gas-flow bending stress, improve the rigid several sides of high speed shaft Face comprehensive design improves the strength vibration characteristic of turbine, improves reliability.

2nd, the utility model passes through Double End contacting mechanical seal component, throttle valve, overflow valve, flowmeter, annular seal space Temperature sensor, annular seal space pressure sensor, charge oil pressure sensor etc. constitute the resistance oil sealing of a strong closed loop of leakproofness Oil circuit is not only avoided that organic working medium leaks out, moreover it is possible to air be prevented to enter power generator, and with heat source fluctuations, section Valve, overflow valve feedback temperature, pressure sensor signal are flowed, resistance oil sealing fuel supply flow rate, pressure are actively adjusted, improve system sealing Performance.

3rd, the utility model uses working medium recovery pipe, fuel and vapor separator and gas-drying apparatus in order to organic working medium and resistance Oil sealing is detached, then pure organic working medium is recycled, and saves resource.

4th, the utility model recycles storage tank in order to the resistance oil sealing in turbine and tooth using lubricating oil recovery pipe and oil Lubricating oil recycling in roller box, further saves resource.

5th, the radial impeller provided by the utility model for ORC power generator has that grade enthalpy drop is big, single-stage expansion is than high The advantages of, the continual and steady operation of high working speed and big centrifugal load can be kept on wider vibration frequency band, it is both high Effect is again safe and reliable.

6th, the utility model by the back side of radial impeller set boss, on the one hand increase the intensity of impeller, it is another Aspect can adjust the intrinsic frequency of impeller by adjusting the position of boss, and impeller is avoided to resonate.

7th, the impeller of the utility model uses the conical bore with helicla flute, is linked and packed using circular cone interference in reduction box height Fast axis external part is convenient to mount and dismount without heating cooling.Special locking and setting element is designed in shaft end, convenient for the repetition of impeller Assembly and disassembly, will not both damage impeller and axis, without additional dynamic balance treatment.

8th, the impeller of the utility model can be under the premise of ensureing that vane profile size shape is constant by adjusting blade Thickness distribution, adjusts flow and adjusting power processing at the adjustment progress frequency modulation for flowing to the cooperation guide vane such as angular distribution, number of blade, completely Change turbine other component is not required to, makes the unit that there is fabulous maintainability and interchangeability.

9th, the spiral case of the utility model is designed using eccentric section variable area, ensures that air-flow circumferential distribution is uniform.Spiral case Chamber is integrally formed stationary parts with impeller, outlet diffuser pipe, reduces the outside leak point of working medium, while cause turbine Structure simplifies, size reduction.Reinforcing rib between volute outlet and guide vane is set, improves spiral case rigidity, Reducing distortion is reduced Interior leakage loss.Reinforcing rib number selects the half or a quarter of guide vane number, avoids the flow-induced vibration for causing impeller.

10th, the impeller of the utility model designs balance hole, annular convex platform and labyrinth teeth sealing to control impeller on wheel disc Axial thrust is determined reasonably to balance bore dia, the sealing number of teeth and gap by numerical simulation, reduces axial thrust, without setting Put additional axial force balance part.

11st, the guide vane of the utility model is prismatic blade, and processing is simple, and guide vane, back chassis integrated machine add rear with before Portion's shroud is by being formed by welding a separate part.Back chassis is fixed on using screw on seal casinghousing, and rotation is prevented to be used in combination It is positioned in assembling.Forepart shroud setting sealing ring prevents from revealing as static seal, and nozzle blade cascade is simple in structure, part is few, assembling It is convenient.

Description of the drawings

Fig. 1 is the structure diagram of the utility model；

Fig. 2 is the sealing system structure chart of the utility model；

Fig. 3 is the partial structural diagram after spiral case, impeller and seal casinghousing assembling.

Fig. 4 is the preferred embodiment 3-D view of impeller；

Fig. 5 is the preferred embodiment cross section view of impeller；

Fig. 6 is the attachment structure schematic diagram for the high speed shaft that the utility model is impeller and reduction box；

Fig. 7 is the vertical section structure schematic diagram of nozzle blade cascade；

Fig. 8 is the cross-sectional structure schematic diagram of nozzle blade cascade；

Fig. 9 is the vertical section structure schematic diagram of spiral case；

Figure 10 is the cross-sectional structure schematic diagram of spiral case.

1- hinders oil sealing supply line, 2- radial-inward-flow turbines, 3- annular seal space temperature sensors, 4- annular seal space pressure sensors, 5- Double End contacting mechanical seal component, 6- gear-boxes, 7- generators, 8- lubricating oil recovery pipes, 9- oil recycling storage tank, 10- Hinder oil sealing petrol station, 11- resistance oil sealing recovery pipes, 12- throttle valves, 13- fuel and vapor separators, 14- gas-drying apparatus, the pure works of 15- Matter recovery pipe, 16- charge oil pressure sensors, 17- overflow valves, 18- flowmeters, 19- impellers, the circumferentially positioned slots of 111-, 112- Blade, 113- wheel discs, 114- balance holes, 115- annular convex platform, the sealing of 116- labyrinth teeths, 117- axial threaded hole, 118- installations Hole, 119- circular grooves, 120- installation axles, 121- taper construction sections, 122- thread segments, 123- keyways, 130- gaskets, 131- Circumferentially positioned key, 132- axial bonds, 140- nuts, 141- grooves, 20- seal casinghousings, the high speed shaft of 21- reduction boxes, 22- resistances Oil sealing oil return opening, 23- resistances oil sealing supply opening, 24- organic working mediums and resistance oil sealing mixture floss hole, the pure working medium recovery ports of 25-, 26- lubricating oil recovery port, 27- spiral cases, 271- outlets diffuser pipe, 272- spiral case chambers, 273- internal stiffeners, 28- nozzles Leaf grating, 281- foreparts shroud, 282- guide vanes, 283- backs chassis, 284- sealed grooves, 285- pin holes.

Specific embodiment

As shown in Figure 1, the utility model provides a kind of Organic Rankine Cycle multikilowatt power generator, including radial-inward-flow turbine 2, Reduction box 6, shaft coupling and generator 7；The high speed shaft of reduction box 6 is directly connected to radial-inward-flow turbine 2, the slow-speed shaft of reduction box 6 It is connect by shaft coupling with generator 7；

Radial-inward-flow turbine includes spiral case 27, impeller 19, nozzle blade cascade 28, seal casinghousing 20 and sealing system；

Seal casinghousing 20 is fixedly mounted on reduction box 6, and spiral case 27 is mounted on by bolt on seal casinghousing 20；Impeller 19 Positioned at 27 inside of spiral case and it is fixedly mounted on the high speed shaft of reduction box 6；In the channel that spiral case 27 is formed with seal casinghousing 20 It is installed with nozzle blade cascade 28；Nozzle blade cascade 28 is for annular and on the excircle of impeller 19；

As shown in Figures 2 and 3, sealing system includes Double End contacting mechanical seal component 5, annular seal space temperature sensor 3rd, annular seal space pressure sensor 4, resistance oil sealing petrol station 10, throttle valve 12, resistance oil sealing supply line 1, overflow valve 17, flowmeter 18, Charge oil pressure sensor 16 and resistance oil sealing recovery pipe 11；

Double End contacting mechanical seal component 5 is mounted on the high speed shaft 21 of reduction box and in seal casinghousing Portion；The Double End contacting mechanical seal component 5 in the side seal close to spiral case 27 inner impeller 19, prevent organic working medium to External world's leakage；Sealing close to 6 side of gear-box, prevents non-condensing air to generating set internal leakage；It is opened on seal casinghousing 20 Equipped with resistance oil sealing oil-feed port 23 and resistance oil sealing oil return opening 22；Resistance oil sealing petrol station 10 is supplied by hindering oil sealing supply line 1 with resistance oil sealing Hydraulic fluid port 23 connects；Resistance oil sealing oil return opening 22 is connected by hindering oil sealing recovery pipe 11 with resistance oil sealing petrol station 10；

Annular seal space pressure sensor 4 and annular seal space temperature sensor 3 are installed on seal casinghousing 20；In resistance envelope recovery pipe 11 Throttle valve 12 is installed；Hinder installation overflow valve 17, flowmeter 18 and charge oil pressure sensor 16 on oil sealing supply line 1.

It should be noted that：The independent oil supply system for being arranged on unit provides the resistance oil sealing incompatible with organic working medium, close Pressure in capsule body is higher than pressure 0.1-0.3MPa at spiral case.Meanwhile 4 He of annular seal space pressure sensor on seal casinghousing Annular seal space temperature sensor 3 for detecting pressure and temperature, and feeds back to throttle valve 12 and overflow valve 17.When turbine variable working condition During operation, pressure changes in spiral case, needs that the charge oil pressure of seal casinghousing is controlled to be consistently greater than by adjusting throttle valve 12 When capsul body temperature is more than set temperature, fuel feeding is controlled by regulation relief valve 17 by pressure 0.1-0.3MPa at spiral case Flow reduces temperature, ensures the secondary normal work of sound friction of Double End contacting mechanical seal component 5.

Sealing system constitutes a closed loop by hindering oil sealing supply line, resistance oil sealing recovery pipe and resistance oil sealing petrol station Resistance oil sealing oil circuit so that recycled in petrol station internal resistance oil sealing, save resource.

In order to be detached, then organic working medium is recycled to organic working medium and resistance oil sealing, which further includes Working medium recovery pipe 15；Organic working medium and resistance oil sealing mixture floss hole 24 are further opened on seal casinghousing 20；It is set on spiral case There is pure working medium recovery port 25；Working medium recovery pipe 15 is connected to organic working medium and resistance oil sealing mixture floss hole 24 and pure work Between matter recovery port 25；The flow direction of 15 upper edge organic working medium of working medium recovery pipe installs fuel and vapor separator 13 and gas dry successively Device 14.The mixture of resistance oil sealing and organic working medium is emitted by organic working medium recovery port in working medium recovery pipe after collecting, and is passed through The fuel and vapor separator of working medium recovery pipe is crossed, the resistance oil sealing deposit fuel and vapor separator bottom after separation is periodically recycled；After separation Organic working medium gas is come back to by pure working medium recovery port and secondary use is carried out in spiral case through drier.

In order to the lubricating oil recycling in the resistance oil sealing and gear-box in turbine.The system further includes lubricating oil and returns Closed tube road 8 and oil recycling storage tank 9；Lubricating oil recovery port 26 is further opened on gear box casing；Lubricating oil recovery pipe 8 connects Between oil recycling storage tank 9 and lubricating oil recovery port 26.The lubricating oil in resistance oil sealing and gear-box in seal casinghousing passes through profit Lubricating oil recovery port is emitted into oil recycling storage tank by lubricating oil recovery pipe.

The axle sealing system being made up of a series of above-mentioned devices realizes that organic working medium, resistance oil sealing, lubricating oil zero leak Leakage, and resistance oil sealing charge oil pressure, flow dynamics adjusting are realized, ensure that mechanical seal is operated in optimum state.

Referring to Fig. 4-6, the preferred embodiment structure that the utility model provides impeller 19 includes wheel disc 113 and multiple blades 112, wheel disc 113 is provided centrally with mounting hole 118, and runner, the hole of mounting hole 118 are formed between adjacent two blades 112 Diameter is sequentially reduced along wheel disc 113 is axial from the back side to front.There are one circular groove 119 and annulars for the back side setting of wheel disc 113 Boss 115 forms stair-stepping annular compartment when installing and using.The outer diameter of wheel disc 113 is 300mm in the present embodiment.

Blade 112 includes the linearly extended direct current portion radially set from the outside to the core along wheel disc 113 and helically twisted leads To portion；The height of blade 112 radially successively increases from the outside to the core along wheel disc 113, the thickness of blade 112 from root to top successively Reduce, the root and the front of wheel disc 113 of blade 112 are connected as one.The root of blade 112 is connect with the front of wheel disc 113 Place's setting rounded corner, chamfer radius radially linearly become R5mm from R4mm from the outside to the core along wheel disc, maximize and improve blade and wheel The bonding strength of disk.

There are one circumferentially positioned slot 111 and four axial threaded hole 117, institutes for positive 118 surrounding of the mounting hole setting of wheel disc Some axial threaded hole are located on same circumference.Circumferentially positioned slot 111 is used to carry out radial impeller circumferentially fixed.It is axial Threaded hole 117 is set along the axial direction of wheel disc, facilitates the dismounting of radial impeller.Shape of threads oil guide groove is additionally provided in mounting hole 118, For filling hydraulic oil when installing or removing radial impeller.

Blade number is 15 in the present embodiment, and putting down there are one perforation wheel disc is respectively provided between the adjacent blade of each two Weighing apparatus hole 114 so that axial thrust ensures in a suitable range.A diameter of 4mm of balance hole 114, overall balance hole pair The influence of flowing and technological requirement, balance hole center are arranged in centered on impeller axis, a diameter of 75mm~80mm's On circumference.The stress raisers that minor radius is brought in order to prevent, impeller back balance hole entrance are equipped with rounding angle φ 1mm.

On the one hand the setting of annular convex platform 115 increases the intensity of impeller, on the other hand can be by adjusting the position of boss The intrinsic frequency that impeller is adjusted with size is put, impeller is avoided to resonate.In the present embodiment, by finite element analysis, work as ring The minimum diameter of shape boss 115 takes φ 165mm~φ 175mm, and axial height takes 10mm, when radical length takes 12.5mm, impeller Resonance meets safety margin requirement.

Further, as shown in figure 5, labyrinth teeth is set to seal 116 on the excircle of annular convex platform 115, not only effectively Leakage rate is reduced, and reduces axial thrust.In the present embodiment, by finite element analysis, when the radial clearance of labyrinth teeth During less than 0.4mm, leakage rate and axial thrust are substantially reduced, and significant sealing affection increases, and labyrinth teeth radial clearance is smaller, Sealability is stronger.

The geometry molded line of the impeller blade 112 of the utility model is to obtain root, middle part and top geometry in one-dimensional design On the basis of parameter, three-dimension curved surface molded design is carried out, blade profile section is defined using the mean camber line mode of adding thickness, and three-dimensional product is folded to adopt The three-dimensional free surface covering forming of negated straight burr, meridian surface shape then take three rank Bezier curves to construct.The impeller of design Declared working condition lower whorl week efficiency be up to 88%, impeller can in wider range high-efficiency operation, meet industrial exhaust heat The off design performance requirement utilized.

Referring to Fig. 6, the connection structure of the high speed shaft of the utility model impeller and reduction box includes the high speed shaft of reduction box 120th, gasket 130 and nut 140.

The high speed shaft 120 of reduction box includes a taper construction section 121 and positioned at taper construction section top and nut 140 The thread segment 122 being adapted, the outer circumference surface of taper construction section 121 are the tapers being adapted with the mounting hole of radial impeller 118 Interference face, there are one keyways 123 in an axial direction for setting on the outer circumference surface of thread segment 122.

Gasket 130 is between impeller 19 and nut 140.There are one weeks towards setting on the side of impeller 19 for gasket 130 To positioning key 131, circumferentially positioned key 131 is adapted with the circumferentially positioned slot 111 of impeller 19.It is set on the inner periphery of gasket 130 There are one axial bond 132, axial bond 132 is adapted with the keyway 123 of thread segment 122.

Fluted 141 are set on the outer end face of nut 140, axial bond 132 is provided with extension on the direction towards nut Section, extended segment is adapted with the groove 141 on nut surface.

In the present embodiment, the groove of nut is radially set on the outer end face for be parallel to gasket, the extended segment edge of axial bond It is adapted after bent radial with groove.

The circumferential direction of impeller 19 is realized by the keyway connection between gasket 130, impeller 19 and gear-box installation axle 120 The axially position of impeller 19 is realized in positioning by the screwing force for controlling nut 140 so that impeller is eliminated when repeating and assembling and disassembling Dynamic balancing detects, and has saved great amount of cost, has been effectively improved economy.

It is emphasized that：The impeller 19 of the utility model can be under the premise of ensureing that vane profile size shape is constant Thickness distribution by adjusting blade 112, flow to the fit with nozzle such as angular distribution, number of blade leaf grating 28 adjustment carry out frequency modulation, Flow and adjusting power processing are adjusted, change turbine other component is not required to completely, makes the unit that there is fabulous maintainability and interchangeability.

Referring to Fig. 7 and 8, nozzle blade cascade 28 includes forepart shroud 281, back chassis 283 and multiple guide vanes 282；Before Portion's shroud 281 and back chassis 283 are arranged in parallel, and multiple guide vanes 282 are evenly distributed in the circumferential direction in 281 He of forepart shroud Between back chassis 283；Sealing ring is installed, sealing ring is placed in forepart shroud between the forepart shroud 281 and spiral case 27 In annular seal grooves 284 on 281；Along the circumferential direction uniformly distributed pin hole 285 is provided on the back chassis 283, is used In connecting and position by pin with seal casinghousing 20；112 number of number combination impeller blade of guide vane 282 is selected； The guide vane 282 is transonic airfoil prismatic blade.

The nozzle blade cascade 28 of the utility model is utilized in without the conventional supersonic speed blade profile of selection on the basis of TC-2P The Transonic Blade Profile of optimization.Because poor efficiency under the low operating mode of supersonic speed blade profile, very sensitive to machining accuracy.The guide vane 282 section molded line are molded using bez i er battens, are chamfer using throat and are obtained supersonic airstream, for the physical property of organic working medium It optimizes, can ensure higher efficiency in subsonic speed to supersonic envelope, be suitable for the parameter fluctuation and operating mode of waste heat source Variation, without complicated variable working condition regulating mechanism.

The nozzle blade cascade 28 is designed to an individual modular piece, facilitates and carries out seriation extension.It can coordinate Impeller requirement adjustment blade parameter carries out frequency modulation, does not change overall dimension and structure type, in the situation for only replacing guide vane 282 Lower improvement bladed disk vibration characteristic.Impeller adjustment guide vane height, angle can be coordinated to form best flow-rate adjustment, it is quiet not changing The seriation of the unit power grade is formed while stop part, adapts to the demand of different heat sources parameter.

Referring to Fig. 9 and 10, the spiral case 27 of the radial-inward-flow turbine 2 includes outlet diffuser pipe 271, spiral case chamber 272 and inside Reinforcing rib 273；

Spiral case 27 is molded using eccentric section variable area, is protected using the circular rectors design such as one-dimensional, the section of spiral case chamber 272 Card air-flow is circumferentially evenly distributed into nozzle blade cascade 28.Spiral case chamber 272 and outlet one entirety of composition of diffuser pipe 271 are quiet Subassembly reduces the outside leak point of working medium, while turbine structure is caused to simplify size reduction.It is exported in spiral case chamber 272 Internal stiffeners 273 between guide vane 282 are set, improve spiral case rigidity, Reducing distortion reduces interior leakage loss.Reinforcing rib Number selects the half or a quarter of guide vane number, avoids the flow-induced vibration for causing impeller.273 section of reinforcing rib is symmetrical Template, import, to improve inlet air flow, are exported and are arranged on ring section for obtuse to be semicircle.The peace of the reinforcing rib 273 Dress angle and width needs are designed according to the established angle and thickness of guide vane 282.273 established angle of reinforcing rib in the implementation case For with 46 ° of radial direction angle, width 12mm.

The power generator of the utility model is existed using dryness working medium such as R245fa, R1233zd designed for generated output Between 100~1000KW.In waste heat recovery, equipment cost and efficiency and the difficulty of installation manufacture are considered, in 100kw Multiatage axial flow turbine generator is mostly used, therebetween using positive displacement power generator more in more than 1000kw below It is simple in structure efficient mostly using inward flow turbine power generator.The turbine generator uses dryness organic working medium R245fa, R1233zd etc. are working media, nontoxic non-combustible, environmentally friendly, and there is no the erosion problems of expansion condensation.

Embodiment：Using 130 DEG C or so low-pressure saturated steams is heat sources in industrial production, flow 5.4t/h, with R245fa For working medium, rated speed 10676rpm, 110 DEG C of fluid inlet temperature, inlet pressure 1.4Mpa.Turbine designs wheel efficiency 88%, export shaft efficiency 80%.It is verified by different loads working condition tests, turbine power generation efficiency is successful in experiment up to 82% Realize electrical power output from zero load to 320kw.

Claims (10)

1. a kind of Organic Rankine Cycle multikilowatt power generator, including radial-inward-flow turbine, reduction box, shaft coupling and generator；Subtract The high speed shaft of fast case is directly connected to radial-inward-flow turbine, and the slow-speed shaft of reduction box is connect by shaft coupling with generator；

It is characterized in that：

The radial-inward-flow turbine includes spiral case, impeller, nozzle blade cascade, seal casinghousing and sealing system；

Seal casinghousing is fixedly mounted on reduction box, and spiral case is mounted on by bolt on seal casinghousing；Impeller is located inside spiral case And it is fixedly mounted on the high speed shaft of reduction box；Nozzle blade cascade is installed in the channel that spiral case is formed with seal casinghousing； Nozzle blade cascade is for annular and on the excircle of impeller；

Sealing system includes Double End contacting mechanical seal component, resistance oil sealing petrol station, throttle valve, overflow valve, flowmeter, sealing Chamber temperature sensor, annular seal space pressure sensor, charge oil pressure sensor, fuel and vapor separator, gas-drying apparatus, resistance oil sealing supply And recovery pipe；

The Double End contacting mechanical seal component is mounted on the high speed shaft of reduction box and inside seal casinghousing；It is close Resistance oil sealing oil-feed port and resistance oil sealing oil return opening are offered on capsule body；Resistance oil sealing oil-feed port is sealed by hindering oil sealing supply line with resistance Petrol station connects；Resistance oil sealing oil return opening is connected by hindering oil sealing recovery pipe with resistance oil sealing petrol station；

Annular seal space pressure sensor and annular seal space temperature sensor are installed on the seal casinghousing；

Hinder installation overflow valve, flowmeter, charge oil pressure sensor on oil sealing supply line；It hinders and throttling is installed in oil sealing recovery pipe Valve.

2. Organic Rankine Cycle multikilowatt power generator according to claim 1, it is characterised in that：The sealing system is also Including working medium recovery pipe；Working medium and resistance oil sealing mixture floss hole are offered on seal casinghousing；Pure work is provided on spiral case Matter recovery port；Working medium recovery pipe is connected between organic working medium and resistance oil sealing mixture floss hole and pure working medium recovery port； In working medium recovery pipe, fuel and vapor separator and gas-drying apparatus are installed successively along the flow direction of organic working medium.

3. Organic Rankine Cycle multikilowatt power generator according to claim 1 or 2, it is characterised in that：The sealing system System further includes lubricating oil recovery pipe and oil recycling storage tank；Lubricating oil recovery port is offered on gear box casing；Lubricating oil returns Closed tube road is connected between oil recycling storage tank and lubricating oil recovery port.

4. Organic Rankine Cycle multikilowatt power generator according to claim 3, it is characterised in that：Impeller is set including center The multiple blades put the wheel disc of mounting hole and be evenly arranged in the front of wheel disc form runner between adjacent two blades；Institute The back side for stating wheel disc is coaxially disposed from inside to outside there are one circular groove and an annular convex platform；The aperture edge wheel of the mounting hole Dish axle is sequentially reduced to 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 guide part；Institute The height for stating blade radially successively increases 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 are connected as one；

There are one circumferentially positioned slot and multiple axial threaded hole for setting around the positive mounting hole of wheel disc；Outside the annular convex platform It is provided circumferentially about to have labyrinth teeth sealing structure.

5. Organic Rankine Cycle multikilowatt power generator according to claim 4, it is characterised in that：The root of the blade Rounded corner is set with the positive junction of wheel disc, chamfer radius reduces along wheel disc is radially linear from the outside to the core.

6. Organic Rankine Cycle multikilowatt power generator according to claim 5, it is characterised in that：Each two adjacent blades Between runner in be respectively provided with there are one the balance hole of perforation wheel disc, all balance holes are evenly arranged on same circumference；Institute It states balance hole and rounded corner is set in the exit at the wheel disc back side.

7. Organic Rankine Cycle multikilowatt power generator according to claim 6, it is characterised in that：The circumferentially positioned slot It is circumferentially evenly arranged with threaded hole, the quantity of blade is the integral multiple of the sum of circumferentially positioned slot and axial thread hole number, week It is respectively positioned between two adjacent blades to locating slot and threaded hole.

8. Organic Rankine Cycle multikilowatt power generator according to claim 7, it is characterised in that：It is set in the mounting hole It is equipped with shape of threads oil guide groove.

9. Organic Rankine Cycle multikilowatt power generator according to claim 8, it is characterised in that：

The nozzle blade cascade includes forepart shroud, back chassis and multiple guide vanes；Forepart shroud is parallel with back chassis to be set It puts, multiple guide vanes are evenly distributed in the circumferential direction between forepart shroud and back chassis；The forepart shroud and spiral case it Between sealing ring is installed；The back chassis is connected with seal casinghousing by along the circumferential direction uniformly distributed multiple pins positioning and screw It connects；Guide vane number and impeller blade number are relatively prime；The guide vane is transonic airfoil prismatic blade.

10. Organic Rankine Cycle multikilowatt power generator according to claim 9, it is characterised in that：The spiral case includes Spiral case chamber, internal stiffeners and outlet diffuser pipe；The spiral case chamber section is circle, and center of circle busbar is eccentric screw Line, area of section streamwise are gradually reduced；The internal stiffeners for it is multiple and uniformly be mounted on spiral case chamber outlet with Between the guide vane；The internal stiffeners are symmetrical template, and import is semicircle, and outlet is located on anchor ring；In described Portion's reinforcing rib at the cut water arrange, be 46 ° with radial direction angle；The reinforcing rib number for guide vane number half or A quarter；The outlet diffuser pipe is connected with spiral case chamber and is mutually perpendicular to the working medium entrances direction of spiral case chamber.