CN104179536B - Determine expansion ratio rock gas radial-inward-flow turbine expansion power generation unit - Google Patents
Determine expansion ratio rock gas radial-inward-flow turbine expansion power generation unit Download PDFInfo
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- CN104179536B CN104179536B CN201410389767.8A CN201410389767A CN104179536B CN 104179536 B CN104179536 B CN 104179536B CN 201410389767 A CN201410389767 A CN 201410389767A CN 104179536 B CN104179536 B CN 104179536B
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Abstract
The invention provides one and determine expansion ratio rock gas radial-inward-flow turbine expansion power generation unit.This is determined expansion ratio rock gas radial-inward-flow turbine expansion power generation unit and comprises: radial-inward-flow turbine, and it comprises multi-disc stator; Gear-box, comprises intermeshing high gear and low speed gear, and wherein, the gear shaft of high gear is connected with the impeller shaft of radial-inward-flow turbine; Generator set, its main shaft is connected with the gear shaft of the low speed gear of gear-box, and its moment of torsion utilizing the gear shaft of low speed gear to export generates electricity; And current output module 40, the electric energy that generator set produces outwards exports by it.The present invention by rock gas energy regenerating, produces electric energy by radial-inward-flow turbine, thus solves the problem of energy waste.
Description
Technical field
The present invention relates to electromechanical industries fluid generator technical field, particularly relate to one and determine expansion ratio rock gas radial-inward-flow turbine expansion power generation unit.
Background technique
In recent years, along with the extensive use of rock gas, the consumption figure of rock gas constantly rises.Pressure energy of natural gas is reclaimed and utilizes it to generate electricity to become the research and development focus in related domain.At present, the device pressure energy of natural gas not reclaimed.
In addition, rock gas gas consumption has stage, in one day, the peak-to-valley ratio of gas consumption is larger, the pressure almost constant of natural gas transport major network, the pressure of user side pipe network also remains unchanged substantially, therefore pressure energy of natural gas recovering device needs to adapt to different gas discharge and the pressure almost constant keeping user's pipe network, existing radial-inward-flow turbine expansion power generation unit can not meet this generic request.
Summary of the invention
(1) technical problem that will solve
In view of above-mentioned technical problem, the invention provides one and determine expansion ratio rock gas radial-inward-flow turbine expansion power generation unit, to realize the effective recovery to pressure energy of natural gas.
(2) technological scheme
The present invention determines expansion ratio rock gas radial-inward-flow turbine expansion power generation unit and comprises: radial-inward-flow turbine 10, and it comprises multi-disc stator; Gear-box 20, comprises intermeshing high gear 21 and low speed gear 22, and wherein, the gear shaft of high gear is connected with the impeller shaft of radial-inward-flow turbine 10; Generator set 30, its main shaft is connected with the gear shaft of the low speed gear of gear-box 20, and its moment of torsion utilizing the gear shaft of low speed gear to export generates electricity; And current output module 40, the electric energy that generator set 30 produces outwards exports by it.
Preferably, the present invention determines in expansion ratio rock gas radial-inward-flow turbine expansion power generation unit, and the connection part of radial-inward-flow turbine 10 and gear-box 20 adopts dry gas sealing structure 15 to seal, and blanket gas is nitrogen.
Preferably, the present invention determines in expansion ratio rock gas radial-inward-flow turbine expansion power generation unit, and the gear shaft of high gear 21 is directly connected with the impeller shaft of radial-inward-flow turbine 10.
Preferably, the present invention determines in expansion ratio rock gas radial-inward-flow turbine expansion power generation unit, and the gear shaft of high gear adopts radial bearing; Arrange thrust disc 23 respectively in the both sides of the tooth of high gear, the below of this thrust disc 23 contacts with the both sides of the tooth of low speed gear, and the axial force that high gear bears passes to low speed gear by this thrust disc 23; Arrange thrust bearing 24 in the both sides of low speed gear, the axial force transmitted by thrust disc 23 is offset by this thrust bearing 24.
Preferably, the present invention determines in expansion ratio rock gas radial-inward-flow turbine expansion power generation unit, and radial-inward-flow turbine 10 comprises: multi-disc stator; And stator angle adjustment parts 14, it adjusts the angle of multi-disc stator.
Preferably, the present invention determines in expansion ratio rock gas radial-inward-flow turbine expansion power generation unit, and generator set comprises: exciting current adjustment module 31, the field current of generator in its regulator generator group 30, and then changes the load of radial-inward-flow turbine 10.
Preferably, the present invention determines in expansion ratio rock gas radial-inward-flow turbine expansion power generation unit, and current output module 40 comprises: normal output channel, and the electric energy produced by generator set 30 is directly to outer output; And rectification output channel, the electric energy rectification produced by generator set 30 is the backward outer output of rated frequency; Wherein, normal output channel and rectification output channel one of them be communicated with, wherein another disconnects, thus is outwards exported by the electric energy that generator set 30 produces.
Preferably, the present invention determines in expansion ratio rock gas radial-inward-flow turbine expansion power generation unit, normal output channel comprises: the first magnetic switch 41, and its front end is connected to the power take-off of generator set 30, and its rear end is connected to the power take-off determining expansion ratio rock gas radial-inward-flow turbine expansion power generation unit; Rectification output channel comprises: rectifier 42, its front end is connected to the power take-off of generator set 30 by the second magnetic switch 43, its rear end is connected to the power take-off determining expansion ratio rock gas radial-inward-flow turbine expansion power generation unit by the 3rd magnetic switch 44, it carries out frequency adjustment to the electric current flowed through.
Preferably, the present invention determines expansion ratio rock gas radial-inward-flow turbine expansion power generation unit and also comprises: flow transducer 11, is arranged at entrance or the outlet of radial-inward-flow turbine 10; Inlet pressure transducer 12 and outlet pressure sensor 13, be arranged at the entrance and exit of radial-inward-flow turbine 10 respectively; And speed probe 25, its gear shaft to low speed gear, the gear shaft of high gear, or the main shaft of generator set 30, rotating speed detect.
Preferably, the present invention determines in expansion ratio rock gas radial-inward-flow turbine expansion power generation unit, current output module also comprises: controller 45, its signal input part is connected to flow transducer 11, inlet pressure transducer 12, outlet pressure sensor 13, speed probe 25, its signal output part is connected to stator angle adjustment parts 14, exciting current adjustment module 31, normal output channel, rectification output channel, for passing through adjustment stator angle adjustment parts 14 or exciting current adjustment module 31, make the actual expansion ratio of radial-inward-flow turbine consistent with default expansion ratio, simultaneously, by controlling the opening and closing of normal output channel and rectification output channel, make the output frequency of generator set consistent with predeterminated frequency.
Preferably, the present invention determines in expansion ratio rock gas radial-inward-flow turbine expansion power generation unit, and the control flow of controller 45 comprises: the actual flow Q obtaining radial-inward-flow turbine 10 according to inlet flow rate sensor 11
r; As actual flow Q
rtime in the first preset range, send instruction to stator angle adjustment part 14, ensure that the actual expansion ratio of radial-inward-flow turbine is consistent with default expansion ratio by the stator angle of adjusting centripetal turbine 10, and outwardly export electric energy by normal output channel; As actual flow Q
routside the first preset range, and time in the second preset range, instruction is sent to exciting current adjustment module 31, by the rotating speed of generator in regulator generator group, and then the rotating speed of adjusting centripetal turbine, ensure that the actual expansion ratio of radial-inward-flow turbine is consistent with default expansion ratio, and outwardly export electric energy by rectification output channel; Wherein, second preset range and the first preset range all set according to the design discharge of radial-inward-flow turbine 10, and the second preset range is more compared with the first preset range off-design flow, the force value that the actual expansion ratio of radial-inward-flow turbine is obtained by inlet pressure transducer 12 and outlet pressure sensor 13 calculates.
Preferably, the present invention determines in expansion ratio rock gas radial-inward-flow turbine expansion power generation unit, in the control flow of controller, as actual flow Q
rtime in the first preset range, send instruction to stator angle adjustment part 14 and comprise: step C: as actual flow Q
rat design discharge Q
d100%-120% within the scope of time, send instruction to stator angle adjustment part 14, make its increase lead leaf divergence; Step D: as actual flow Q
rat design discharge Q
d80%-100% within the scope of time, send instruction to stator angle adjustment part 14, make its reduction lead leaf divergence.
Preferably, the present invention determines in expansion ratio rock gas radial-inward-flow turbine expansion power generation unit, in the control flow of controller, instruction is sent to stator angle adjustment part 14 in step C, make its increase lead leaf divergence comprise: sub-step C1, send instruction to stator angle adjustment part 14, make it increase guide vane opening gradually according to the angle coarse adjustment steps preset, the actual expansion ratio of radial-inward-flow turbine is adjusted in the Coarse adjustment range of default expansion ratio; And sub-step C2, send instruction to stator angle adjustment part 14, make it increase guide vane opening gradually according to the angle fine tuning step-length preset, the actual expansion ratio of radial-inward-flow turbine is adjusted within the scope of the fine tuning of default expansion ratio.
Preferably, the present invention determines in expansion ratio rock gas radial-inward-flow turbine expansion power generation unit, in the control flow of controller, instruction is sent to stator angle adjustment part 14 in step D, make it reduce to lead leaf divergence comprise: sub-step D1, send instruction to stator angle adjustment part 14, make it reduce guide vane opening gradually according to the angle coarse adjustment steps preset, the actual expansion ratio of radial-inward-flow turbine is adjusted in the Coarse adjustment range of default expansion ratio; And sub-step D2, send instruction to stator angle adjustment part 14, make it reduce guide vane opening gradually according to the angle fine tuning step-length preset, the actual expansion ratio of radial-inward-flow turbine is adjusted within the scope of the fine tuning of default expansion ratio.
Preferably, the present invention determines in expansion ratio rock gas radial-inward-flow turbine expansion power generation unit, and in the control flow of controller, angle coarse adjustment steps is 1 °, and angle fine tuning step-length is 0.1 °.
Preferably, the present invention determines in expansion ratio rock gas radial-inward-flow turbine expansion power generation unit, in the control flow of controller, as actual flow Q
routside the first preset range, and time in the second preset range, send instruction to exciting current adjustment module 31 and comprise: step e: as actual flow Q
rat design discharge Q
dless than 80% time, send instruction to exciting current adjustment module 31, make it reduce field current, increase the rotating speed of generator set 30, and then increase radial-inward-flow turbine rotating speed gradually.
Preferably, the present invention determines in expansion ratio rock gas radial-inward-flow turbine expansion power generation unit, in the control flow of controller, step e comprises: sub-step E1, instruction is sent to exciting current adjustment module 31, make it increase the rotating speed of generator in generator set 30 gradually according to the rotating speed coarse adjustment steps preset, and then increase radial-inward-flow turbine rotating speed gradually, the actual expansion ratio of radial-inward-flow turbine is adjusted in the Coarse adjustment range of default expansion ratio; And sub-step E2, instruction is sent to exciting current adjustment module 31, make it increase the rotating speed of generator in generator set 30 gradually according to the rotating speed fine tuning step-length preset, and then increase radial-inward-flow turbine rotating speed gradually, the actual expansion ratio of radial-inward-flow turbine is adjusted within the scope of the fine tuning of default expansion ratio; Wherein, the rotating speed of generator set 30 is obtained by speed probe 25.
Preferably, the present invention determines in expansion ratio rock gas radial-inward-flow turbine expansion power generation unit, and in the control flow of controller, rotating speed coarse adjustment steps is 50r/min, and rotating speed fine tuning step-length is 5r/min.
(3) beneficial effect
As can be seen from technique scheme, the present invention determines expansion ratio rock gas radial-inward-flow turbine expansion power generation unit and has following beneficial effect:
(1) by radial-inward-flow turbine by rock gas energy regenerating, produce electric energy, thus solve the problem of energy waste;
(2) dry gas sealing structure seals the centripetal turbine wheel back of the body, and automatically regulates blanket gas pressure according to gas pressure after radial-inward-flow turbine stator, can ensure the sealing effect under different operating mode;
(3) gear shaft of high gear is directly connected with the impeller shaft of radial-inward-flow turbine, and compared to the connection of traditional radial-inward-flow turbine and gear-box, eliminate shaft joint and two cover bearings, make the lower power consumption of whole unit, generated energy increases;
(4) to centripetal turbine vane and rotational speed regulation, ensure that radial-inward-flow turbine expansion ratio is constant;
(5) generator produces electric energy has two paths to flow to electricity consumption end, automatically regulates, keep electric energy frequency-invariant according to signals of rotational speed sensor;
(6) radial-inward-flow turbine axial force passes to low speed gear axle by high speed gear shaft, reduces thrust bearing power consumption, improves unit generation efficiency.
Accompanying drawing explanation
Fig. 1 is the structural representation determining expansion ratio rock gas radial-inward-flow turbine expansion power generation unit according to the embodiment of the present invention;
Fig. 2 is the control flow determining expansion ratio rock gas radial-inward-flow turbine expansion power generation unit middle controller shown in Fig. 1.
[primary component symbol description]
10-radial-inward-flow turbine;
11-flow transducer; 12,13-pressure transducer;
14-stator adjustment member; 15-dry gas sealing structure;
20-gear-box;
21-high gear; 22-low speed gear;
23-thrust disc; 24-low speed thrust bearing;
25-speed probe;
30-generator set;
31-exciting current adjustment module;
40-current output module;
42-rectifier; 41,43,44-magnetic switch;
45-controller.
Embodiment
For making the object, technical solutions and advantages of the present invention clearly understand, below in conjunction with specific embodiment, and with reference to accompanying drawing, the present invention is described in more detail.It should be noted that, in accompanying drawing or specification describe, similar or identical part all uses identical figure number.The implementation not illustrating in accompanying drawing or describe is form known to a person of ordinary skill in the art in art.In addition, although herein can providing package containing the demonstration of the parameter of particular value, should be appreciated that, parameter without the need to definitely equaling corresponding value, but can be similar to corresponding value in acceptable error margin or design constraints.
The present invention utilizes the pressure reduction of rock gas major network and user's pipe network, produce mechanical shaft work drive electrical generators by radial-inward-flow turbine and produce electric energy, by adjusting centripetal turbine vane aperture and rotating speed, keep the expansion ratio of radial-inward-flow turbine constant, according to the rotating speed of radial-inward-flow turbine, control the path of generator and electricity consumption end, keep exporting electric energy frequency-invariant.
In one exemplary embodiment of the present invention, provide one and determine expansion ratio rock gas radial-inward-flow turbine expansion power generation unit.Fig. 1 is the structural representation determining expansion ratio rock gas radial-inward-flow turbine expansion power generation unit according to the embodiment of the present invention.As shown in Figure 1, the present embodiment is determined expansion ratio rock gas radial-inward-flow turbine expansion power generation unit and is comprised: radial-inward-flow turbine 10, and it comprises multi-disc stator, and its entrance is connected to rock gas major network, and its outlet is connected to user's pipe network; Gear-box 20, comprises intermeshing high gear 21 and low speed gear 22, and wherein the gear shaft of high gear 21 is connected with the impeller shaft of radial-inward-flow turbine 10; Generator set 30, its main shaft is connected with the gear shaft of the low speed gear of gear-box 20; Current output module 40, the electric energy that generator set 30 produces outwards exports by it.
The present embodiment determines expansion ratio rock gas radial-inward-flow turbine expansion power generation unit by radial-inward-flow turbine by rock gas energy regenerating, produces electric energy, achieves the effective recovery to pressure energy of natural gas, thus solves the problem of energy waste
Below each constituent element that the present embodiment determines expansion ratio rock gas radial-inward-flow turbine expansion power generation unit is described in detail.
In the present embodiment, this radial-inward-flow turbine 10 comprises: the stator angle adjustment parts 14 that multi-disc stator and the angle to this multi-disc stator adjust.Wherein, at entrance inlet porting flow transducer 11 and the inlet pressure transducer 12 of this radial-inward-flow turbine, its outlet arranges outlet pressure sensor 13.
In prior art, the radial-inward-flow turbine with stator angle regulating function occurs in the prior art, is no longer described in greater detail herein.
In the present embodiment, flow transducer also can be arranged in the outlet of radial-inward-flow turbine; it will be appreciated by those skilled in the art that; arrange that the flow measurement function that flow transducer realizes is the same at radial-inward-flow turbine entrance and exit, therefore radial-inward-flow turbine outlet arranges flow transducer also within protection scope of the present invention.
The impeller shaft of radial-inward-flow turbine 10 is connected on the gear shaft of the high gear of gear-box 20.At radial-inward-flow turbine 10 connection part with gear-box, adopt dry gas sealing structure, prevent rock gas in radial-inward-flow turbine 10 to outward leakage.Wherein, this dry gas sealing structure 15 adopts nitrogen as blanket gas, and the pressure at the pressure ratio radial-inward-flow turbine impeller back of this nitrogen is slightly high.
In gear-box 20, the gear shaft of high gear is directly connected with the impeller shaft of radial-inward-flow turbine, and compared to the connection of traditional radial-inward-flow turbine and gear-box, eliminate shaft joint and two cover bearings, make the lower power consumption of whole unit, generated energy increases.
In the working procedure of radial-inward-flow turbine, impeller can produce along the outside axial force of outlet.Because the impeller shaft of radial-inward-flow turbine is connected with the gear shaft of gearbox high-speed gear, this axial force transmission gives the gear shaft of high gear.Generally, the both sides of the gear shaft of high gear adopt high speed thrust bearing to eliminate this axial force, but power loss can be caused so excessive.
In the present embodiment, the gear shaft of high gear adopts radial bearing, and arrange thrust disc 23 respectively in the both sides of the tooth of high gear, the below of this thrust disc contacts with the both sides of low speed gear tooth.The axial force that high gear bears passes to low speed gear by this thrust disc.In the both sides of low speed gear, low speed thrust bearing 24 is set.The axial force transmitted by thrust disc 23 is offset by this low speed thrust bearing.
Those skilled in the art can see and draw, in same axial force situation, the power consumption that the power dissipation ratio high speed thrust bearing that low speed thrust bearing produces produces is much smaller, by axial force transmission that the gear-bearing of high gear is subject to low speed gear, and then offset by low speed thrust bearing, power loss can be reduced greatly, improve unit efficiency.
Generator set 30 is the adjustable generator set of field current, and its main shaft is connected with the gear shaft of gear-box 20 low speed gear, generates electricity for the moment of torsion utilizing the gear shaft of low speed gear to export.Be the field current of regulator generator by exciting current adjustment module 31, change the size of radial-inward-flow turbine load, thus the rotating speed of adjusting centripetal turbine.
The shell of gear-box 20 is provided with speed probe 25, to detect the rotating speed of the gear shaft of low speed gear.It will be apparent to those skilled in the art that this speed probe can be arranged on the gear shaft of generator set main shaft place or high gear equally, can the present invention be realized equally.
Current output module 40, outwards exports for the electric energy produced by generator set, comprising: normal output channel, rectification output channel and controller 45.
Please refer to Fig. 1, normal output channel comprises: the first magnetic switch 41, and its front end is connected to the power take-off of generator set 30, and its rear end is connected to the power take-off determining expansion ratio rock gas radial-inward-flow turbine expansion power generation unit.Rectification output channel comprises: rectifier 42, its front end is connected to the power take-off of generator set 30 by the second magnetic switch 43, its rear end is connected to the power take-off determining expansion ratio rock gas radial-inward-flow turbine expansion power generation unit by the 3rd magnetic switch 44, be converted to preset frequency for the electric energy produced generator set.
In rectification output channel, when the electric energy that generator produces departs from rated frequency, the frequency conversion of electric energy is rated frequency 50Hz or the 60Hz of electrical network by rectifier.In order to avoid causing adverse effect to rectifier, at rectifier and front-end and back-end, all magnetic switch is set, but the present invention is not as limit.In other embodiments of the present invention, also a magnetic switch can be only set in the front end of rectifier or rear end, can the present invention be realized equally.
Controller, its signal input part is connected to described inlet flow rate sensor 11, inlet pressure transducer 12, outlet pressure sensor 13, speed probe 25, its signal output part is connected to described stator angle adjustment parts 14, exciting current adjustment module 31, first magnetic switch 41, second magnetic switch 43 and the 3rd magnetic switch 44, for being calculated the actual expansion ratio of radial-inward-flow turbine by inlet pressure transducer and outlet pressure sensor, and by the described stator angle adjustment parts of adjustment, exciting current adjustment module, normal output channel, rectification output channel, make described actual expansion ratio compared with the default expansion ratio of radial-inward-flow turbine, float in preset range.
Fig. 2 is the control flow determining expansion ratio rock gas radial-inward-flow turbine expansion power generation unit middle controller shown in Fig. 1.As shown in Figure 2, the control flow of controller is as follows:
Steps A, obtains the actual flow Q of radial-inward-flow turbine according to inlet flow rate sensor 11
r;
Step B, by actual flow Q
rwith the design discharge Q of radial-inward-flow turbine
dcontrast, as the actual flow Q of radial-inward-flow turbine
rat design discharge Q
d100%-120% within the scope of, perform step C; As the actual flow Q of radial-inward-flow turbine
rat design discharge Q
d80%-100% within the scope of, perform step D; As the actual flow Q of radial-inward-flow turbine
rat design discharge Q
dless than 80%, perform E;
Step C, stator angle adjustment parts 14 send instruction, make its increase lead leaf divergence, keep the expansion ratio of radial-inward-flow turbine constant, and outwardly export electric energy by normal output channel;
In this step, along with flow increases, the expansion ratio of radial-inward-flow turbine will increase, and need to reduce radial-inward-flow turbine expansion ratio by increasing radial-inward-flow turbine guide vane opening, keep the expansion ratio of radial-inward-flow turbine constant
The step C that should be undertaken regulating by stator specifically comprises:
Sub-step C1, sends instruction to stator angle adjustment part 14, makes it increase guide vane opening gradually according to the angle coarse adjustment steps preset, is adjusted in the Coarse adjustment range of default expansion ratio by the actual expansion ratio of radial-inward-flow turbine;
In the coarse adjustment of this sub-step C1, the amplitude of accommodation of the stator angle aperture of coarse adjustment steps is 1 °, and it specifically comprises:
Son is C1a step by step, sends instruction to stator angle adjustment part 14, makes it increase radial-inward-flow turbine stator angle 1 °;
Son is C1b step by step, gather the force value of inlet pressure transducer 12 and outlet pressure sensor 13, obtain the force value that after increasing radial-inward-flow turbine stator angle, radial-inward-flow turbine is imported and exported, obtain the actual expansion ratio of radial-inward-flow turbine, and compare with the expansion ratio that radial-inward-flow turbine is preset;
Son is C1c step by step, if actual expansion ratio is higher than default expansion ratio, re-executes sub-step C1a, C1b;
Son is C1d step by step, if actual expansion ratio is lower than default expansion ratio, then sends instruction to stator angle adjustment part 14, makes it reduce radial-inward-flow turbine stator angle 1 °.
Book step by step in, under last stator angle, radial-inflow turboexpaner import and export expansion ratio is larger than design expansion ratio, after increasing by the first coarse adjustment steps, the expansion ratio of radial-inward-flow turbine is less than designing expansion ratio, and then radial-inward-flow turbine guide vane opening gets back to last guide vane opening.
Sub-step C2, sends instruction to stator angle adjustment part 14, makes it increase guide vane opening gradually according to the angle fine tuning step-length preset, the actual expansion ratio of radial-inward-flow turbine is adjusted within the scope of default expansion ratio fine tuning;
In the fine tuning of this sub-step C2, the amplitude of accommodation of the stator angle aperture of fine tuning step-length is 1/10 of the first coarse adjustment steps amplitude of accommodation, and it specifically comprises:
Son is C2a step by step, sends instruction to stator angle adjustment part 14, makes it increase radial-inward-flow turbine stator angle 0.1 °;
Son is C2b step by step, gather the force value of inlet pressure transducer 12 and outlet pressure sensor 13, obtain the force value that after increasing radial-inward-flow turbine stator angle, radial-inward-flow turbine is imported and exported, obtain the actual expansion ratio of radial-inward-flow turbine, and compare with the expansion ratio that radial-inward-flow turbine is preset;
Son is C2c step by step, if actual expansion ratio is higher than default expansion ratio, re-executes sub-step C2a, C2b;
Son is C2d step by step, if actual expansion ratio is lower than default expansion ratio, then sends instruction to stator angle adjustment part 14, makes it reduce radial-inward-flow turbine stator angle 0.1 °.
Equally, book step by step in, it is larger than design expansion ratio that last stator angle radial-inflow turboexpaner imports and exports expansion ratio, and increase the expansion ratio of radial-inward-flow turbine after fine tuning step-length less than design expansion ratio, then radial-inward-flow turbine guide vane opening gets back to last guide vane opening
So far, in this way, progressively reduce the amplitude of accommodation of stator, increase guide vane opening, the error of the actual expansion ratio that radial-inward-flow turbine is imported and exported and design expansion ratio, within 1%, regulates and terminates.
In addition, outwardly export electric energy opened by control first magnetic switch 41 by normal output channel, the second magnetic switch 43 and 44 is closed and is realized.
Step D, sends instruction to stator angle adjustment part 14, makes it lead leaf divergence by reduction, keeps the expansion ratio of radial-inward-flow turbine constant, outwardly exports electric energy by normal output channel;
In this step, along with flow reduces, the expansion ratio of radial-inward-flow turbine will reduce, and needing increases radial-inward-flow turbine expansion ratio by reducing radial-inward-flow turbine guide vane opening, keep the expansion ratio of radial-inward-flow turbine constant.
The step D that should be undertaken regulating by stator specifically comprises:
Sub-step D1, instruction is sent to stator angle adjustment part 14, make it reduce guide vane opening gradually according to the angle coarse adjustment steps preset, the amplitude of accommodation of the stator angle aperture of the first coarse adjustment steps is 1 °, is adjusted in the Coarse adjustment range of default expansion ratio by the actual expansion ratio of radial-inward-flow turbine;
Son is D1a step by step, sends instruction to stator angle adjustment part 14, makes it reduce radial-inward-flow turbine stator angle 1 °;
Son is D1b step by step, gather the force value of inlet pressure transducer 12 and outlet pressure sensor 13, obtain the force value that after reducing radial-inward-flow turbine stator angle, radial-inward-flow turbine is imported and exported, obtain the actual expansion ratio of radial-inward-flow turbine, and compare with the expansion ratio that radial-inward-flow turbine is preset;
Son is D1c step by step, if actual expansion ratio is lower than default expansion ratio, re-executes sub-step D1a, D1b;
Son is D1d step by step, if actual expansion ratio is higher than default expansion ratio, then sends instruction to stator angle adjustment part 14, makes it increase radial-inward-flow turbine stator angle 1 °;
Book step by step in, under last stator angle, to import and export expansion ratio design expansion ratio little for radial-inflow turboexpaner, and the expansion ratio reducing radial-inward-flow turbine after the first coarse adjustment steps is larger than design expansion ratio, and then radial-inward-flow turbine guide vane opening gets back to last guide vane opening.
Sub-step D2, instruction is sent to stator angle adjustment part 14, it is made to reduce guide vane opening gradually according to the fine tuning step-length preset, the amplitude of accommodation of the stator angle aperture of fine tuning step-length is 1/10 of the first coarse adjustment steps amplitude of accommodation, is worth within the scope of 0.1 ° by stator angular adjustment corresponding with default expansion ratio for stator angle corresponding for the actual expansion ratio of radial-inward-flow turbine;
Son is D2a step by step, sends instruction to stator angle adjustment part 14, makes it reduce radial-inward-flow turbine stator angle 0.1 °;
Son is D2b step by step, gather the force value of inlet pressure transducer 12 and outlet pressure sensor 13, obtain the force value that after reducing radial-inward-flow turbine stator angle, radial-inward-flow turbine is imported and exported, obtain the actual expansion ratio of radial-inward-flow turbine, and compare with the expansion ratio that radial-inward-flow turbine is preset;
Son is D2c step by step, if actual expansion ratio is lower than default expansion ratio, re-executes sub-step D2a, D2b;
Son is D2d step by step, if actual expansion ratio is higher than default expansion ratio, then sends instruction to stator angle adjustment part 14, makes it increase radial-inward-flow turbine stator angle 0.1 °.
Equally, book step by step in, it is little that last stator angle radial-inflow turboexpaner imports and exports expansion ratio design expansion ratio, and increase the expansion ratio of radial-inward-flow turbine after fine tuning step-length larger than design expansion ratio, then radial-inward-flow turbine guide vane opening gets back to last guide vane opening.
So far, in this way, progressively reduce the amplitude of accommodation of stator, reduce guide vane opening, the error of the actual expansion ratio that radial-inward-flow turbine is imported and exported and design expansion ratio, within 1%, regulates and terminates.
In addition, outwardly export electric energy opened by control first magnetic switch 41 by normal output channel, the second magnetic switch 43 and 44 is closed and is realized.
Step e: send instruction to exciting current adjustment module 31, it is made to reduce field current, thus reduce the load of generator set 30, by the rotating speed of the rotating speed indirect regulation radial-inward-flow turbine of generator set, keep the expansion ratio of radial-inward-flow turbine constant by the rotating speed increasing radial-inward-flow turbine, and export electric energy by rectification output channel.
In this step, along with flow reduces, the expansion ratio of radial-inward-flow turbine will reduce, and needing increases radial-inward-flow turbine expansion ratio by increasing radial-inward-flow turbine rotating speed, keep the expansion ratio of radial-inward-flow turbine constant
The step e should being undertaken regulating by stator specifically comprises:
Sub-step E1, instruction is sent to exciting current adjustment module 31, make it increase the rotating speed of generator in generator set according to the rotating speed coarse adjustment steps preset, and then increase radial-inward-flow turbine rotating speed, the actual expansion ratio of radial-inward-flow turbine is adjusted in the Coarse adjustment range of default expansion ratio;
In book step e 1, the amplitude of accommodation of the radial-inward-flow turbine rotating speed of rotating speed coarse adjustment steps is 50 × (gear-box parameter is than N) r/min, specifically comprises:
Son is E1a step by step, sends instruction to exciting current adjustment module 31, and the rotating speed making it increase generator in generator set gradually increases 50r/min, and then increases radial-inward-flow turbine rotating speed 50 × (gear-box parameter is than N) r/min;
Son is E1b step by step, gather the force value of inlet pressure transducer 12 and outlet pressure sensor 13, obtain the force value that after increasing radial-inward-flow turbine rotating speed, radial-inward-flow turbine is imported and exported, obtain the actual expansion ratio of radial-inward-flow turbine, and compare with the expansion ratio that radial-inward-flow turbine is preset.
Son is E1c step by step, if actual expansion ratio is lower than default expansion ratio, re-executes sub-step E1a, E1b;
Son is E1d step by step, if actual expansion ratio is higher than default expansion ratio, then send instruction to exciting current adjustment module 31, make it increase the rotating speed 50r/min of generator in generator set, and then reduce radial-inward-flow turbine rotating speed 50 × (gear-box parameter is than N) r/min;
Book step by step in, under last radial-inward-flow turbine rotating speed, to import and export expansion ratio less than design expansion ratio for radial-inflow turboexpaner, and increase the expansion ratio of radial-inward-flow turbine after rotating speed coarse adjustment steps larger than design expansion ratio, then the rotating speed of radial-inward-flow turbine gets back to last rotating speed.
Sub-step E2, instruction is sent to exciting current adjustment module 31, it is made to increase the rotating speed of generator in generator set according to the rotating speed fine tuning step-length preset, and then increase radial-inward-flow turbine rotating speed, by adjustment of rotational speed corresponding with default expansion ratio for rotating speed corresponding for the actual expansion ratio of radial-inward-flow turbine within the scope of 5 × (gear-box parameter is than N) r/min;
In this sub-step E2, the amplitude of accommodation of the rotating speed of fine tuning step-length is 1/10 of the rotating speed coarse adjustment steps amplitude of accommodation, specifically comprises:
Son is E2a step by step, sends instruction to exciting current adjustment module 31, makes it increase the rotating speed 5r/min of generator in generator set, and then increases radial-inward-flow turbine rotating speed 5 × (gear-box parameter is than N) r/min;
Son is E2b step by step, gather the force value of inlet pressure transducer 12 and outlet pressure sensor 13, obtain the force value that after increasing radial-inward-flow turbine rotating speed, radial-inward-flow turbine is imported and exported, obtain the actual expansion ratio of radial-inward-flow turbine, and compare with the expansion ratio that radial-inward-flow turbine is preset;
Son is E2c step by step, if actual expansion ratio is lower than default expansion ratio, re-executes sub-step E2a, E2b;
Son is E2d step by step, if actual expansion ratio is higher than default expansion ratio, then send instruction to exciting current adjustment module 31, make it reduce the rotating speed 5r/min of generator in generator set, and then reduce radial-inward-flow turbine rotating speed 5 × (gear-box parameter is than N) r/min.
Equally, book step by step in, under last rotating speed, to import and export expansion ratio less than design expansion ratio for radial-inflow turboexpaner, and increase the expansion ratio of radial-inward-flow turbine after fine tuning step-length larger than design expansion ratio, then radial-inward-flow turbine rotating speed gets back to last rotating speed.
In this way, progressively reduce the amplitude of accommodation of rotating speed, increase radial-inward-flow turbine rotating speed, the error of the actual expansion ratio that radial-inward-flow turbine is imported and exported and design expansion ratio, within 1%, regulates and terminates.
In addition, above-mentioned outwardly exports electric energy by rectification output channel, and close by controlling the first magnetic switch 41, the second magnetic switch 43 and 44 opens realization.
Those skilled in the art should understand, the changes in flow rate scope of natural gas line is larger, and current radial-inward-flow turbine is to determine the flow adjustment range under expansion ratio less, current rock gas expansion power generation unit is all be configured according to the minimum tolerance of pipeline, work under making expansion power generation unit be in rated flow always, the energy of the rock gas unnecessary peak period wastes by this, can not reclaim.By structural type of the present invention, pressure energy of natural gas when different air-flow can be reclaimed, also can ensure expansion ratio constant on natural gas line simultaneously, according to gas inlet air inflow, adjusting centripetal turbine vane or radial-inward-flow turbine rotating speed, realize radial-inward-flow turbine outlet pressure constant, ensure that this radial-inward-flow turbine is the radial-inward-flow turbine determining expansion ratio.
So far, by reference to the accompanying drawings the embodiment of the present invention has been described in detail.Describe according to above, those skilled in the art should determine expansion ratio rock gas radial-inward-flow turbine expansion power generation unit to the present invention have been had and has clearly been familiar with.
In addition, the above-mentioned definition to each element and method is not limited in various concrete structures, shape or the mode mentioned in embodiment, those of ordinary skill in the art can change simply it or replace, such as: magnetic switch can cut-off way switch to replace with common.
In sum, the present invention determines expansion ratio rock gas radial-inward-flow turbine expansion power generation unit and namely realizes rock gas energy regenerating, the demand of different tolerance can be met again, be applicable to the gas consumption demand of different user end, have that cost is low, working stability, efficiency of energy utilization high, have broad application prospects.
Above-described specific embodiment; object of the present invention, technological scheme and beneficial effect are further described; be understood that; the foregoing is only specific embodiments of the invention; be not limited to the present invention; within the spirit and principles in the present invention all, any amendment made, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (16)
1. determine an expansion ratio rock gas radial-inward-flow turbine expansion power generation unit, it is characterized in that, comprising:
Radial-inward-flow turbine (10), it comprises:
Multi-disc stator; And
Stator angle adjustment parts (14), it adjusts the angle of described multi-disc stator;
Gear-box (20), comprises intermeshing high gear (21) and low speed gear (22), and wherein, the gear shaft of described high gear is connected with the impeller shaft of described radial-inward-flow turbine (10);
Generator set (30), its main shaft is connected with the gear shaft of the low speed gear of described gear-box (20), and its moment of torsion utilizing the gear shaft of low speed gear to export generates electricity, and comprising:
Exciting current adjustment module (31), it regulates the field current of generator in described generator set (30), and then changes the load of described radial-inward-flow turbine (10); And
Current output module (40), the electric energy that described generator set (30) produces outwards exports by it;
Wherein, by adjustment stator angle adjustment parts (14) or exciting current adjustment module (31), make the actual expansion ratio of radial-inward-flow turbine consistent with default expansion ratio.
2. according to claim 1ly determine expansion ratio rock gas radial-inward-flow turbine expansion power generation unit, it is characterized in that, the connection part of described radial-inward-flow turbine (10) and gear-box (20) adopts dry gas sealing structure (15) to seal, and its blanket gas is nitrogen.
3. according to claim 1ly determine expansion ratio rock gas radial-inward-flow turbine expansion power generation unit, it is characterized in that, the gear shaft of described high gear (21) is directly connected with the impeller shaft of described radial-inward-flow turbine (10).
4. according to claim 1ly determine expansion ratio rock gas radial-inward-flow turbine expansion power generation unit, it is characterized in that, the gear shaft of described high gear adopts radial bearing;
Thrust disc (23) is set respectively in the both sides of the tooth of high gear, the below of this thrust disc (23) contacts with the both sides of the tooth of low speed gear, and the axial force that described high gear bears passes to low speed gear by this thrust disc (23);
Thrust bearing (24) is set in the both sides of low speed gear, is transmitted by described thrust disc (23) and next axial force is offset by this thrust bearing (24).
5. according to claim 1ly determine expansion ratio rock gas radial-inward-flow turbine expansion power generation unit, it is characterized in that, described current output module (40) comprising:
Normal output channel, the electric energy produced by generator set (30) is directly to outer output; And
The electric energy rectification that generator set (30) produces is the backward outer output of rated frequency by rectification output channel;
Wherein, described normal output channel and rectification output channel one of them be communicated with, wherein another disconnects, thus is outwards exported by the electric energy that described generator set (30) produces.
6. according to claim 5ly determine expansion ratio rock gas radial-inward-flow turbine expansion power generation unit, it is characterized in that:
Described normal output channel comprises: the first magnetic switch (41), its front end is connected to the power take-off of described generator set (30), and its rear end is connected to the described power take-off determining expansion ratio rock gas radial-inward-flow turbine expansion power generation unit;
Described rectification output channel comprises: rectifier (42), its front end is connected to the power take-off of generator set (30) by the second magnetic switch (43), its rear end is connected to the described power take-off determining expansion ratio rock gas radial-inward-flow turbine expansion power generation unit by the 3rd magnetic switch (44), and it carries out frequency adjustment to the electric current flowed through.
7. according to claim 5ly determine expansion ratio rock gas radial-inward-flow turbine expansion power generation unit, it is characterized in that, also comprise:
Flow transducer (11), is arranged at entrance or the outlet of described radial-inward-flow turbine (10);
Inlet pressure transducer (12) and outlet pressure sensor (13), be arranged at the entrance and exit of described radial-inward-flow turbine (10) respectively; And
Speed probe (25), it detects the rotating speed of the main shaft of the gear shaft of low speed gear, the gear shaft of high gear or generator set (30).
8. according to claim 7ly determine expansion ratio rock gas radial-inward-flow turbine expansion power generation unit, it is characterized in that, described current output module also comprises:
Controller (45), its signal input part is connected to described flow transducer (11), inlet pressure transducer (12), outlet pressure sensor (13), speed probe (25), its signal output part is connected to described stator angle adjustment parts (14), exciting current adjustment module (31), normal output channel, rectification output channel, for passing through the described stator angle adjustment parts (14) of adjustment or exciting current adjustment module (31), make the actual expansion ratio of radial-inward-flow turbine consistent with default expansion ratio, simultaneously, by controlling the opening and closing of normal output channel and rectification output channel, make the output frequency of described generator set consistent with predeterminated frequency.
9. according to claim 8ly determine expansion ratio rock gas radial-inward-flow turbine expansion power generation unit, it is characterized in that, the control flow of described controller (45) comprising:
Steps A: the flow transducer (11) according to entrance obtains the actual flow Q of described radial-inward-flow turbine (10)
r;
Step B, by actual flow Q
rwith the design discharge Q of radial-inward-flow turbine
dcontrast, as the actual flow Q of radial-inward-flow turbine
rin the first preset range, perform step T '; As the actual flow Q of radial-inward-flow turbine
rin the second preset range, perform step e;
Step T ': as actual flow Q
rtime in the first preset range, instruction is sent to stator angle adjustment part (14), ensure that the actual expansion ratio of radial-inward-flow turbine is consistent with default expansion ratio by the stator angle of adjusting centripetal turbine (10), and outwardly export electric energy by described normal output channel;
Step e: as actual flow Q
routside the first preset range, and time in the second preset range, instruction is sent to exciting current adjustment module (31), by the rotating speed of generator in regulator generator group, and then the rotating speed of adjusting centripetal turbine, ensure that the actual expansion ratio of radial-inward-flow turbine is consistent with default expansion ratio, and outwardly export electric energy by described rectification output channel;
Wherein, second preset range and the first preset range all set according to the design discharge of described radial-inward-flow turbine (10), and the second preset range is more compared with the first preset range off-design flow, the force value that the actual expansion ratio of described radial-inward-flow turbine is obtained by inlet pressure transducer (12) and outlet pressure sensor (13) calculates.
10. according to claim 9ly determine expansion ratio rock gas radial-inward-flow turbine expansion power generation unit, it is characterized in that, in described step T ', as actual flow Q
rtime in the first preset range, send instruction to stator angle adjustment part (14) and comprise:
Step C: as actual flow Q
rat design discharge Q
d100%-120% within the scope of time, send instruction to stator angle adjustment part (14), make its increase lead leaf divergence;
Step D: as actual flow Q
rat design discharge Q
d80%-100% within the scope of time, send instruction to stator angle adjustment part (14), make its reduction lead leaf divergence.
11. according to claim 10ly determine expansion ratio rock gas radial-inward-flow turbine expansion power generation unit, it is characterized in that, send instruction in described step C to stator angle adjustment part (14), make it increase leading leaf divergence comprising:
Sub-step C1, sends instruction to stator angle adjustment part (14), makes it increase guide vane opening gradually according to the angle coarse adjustment steps preset, is adjusted in the Coarse adjustment range of default expansion ratio by the actual expansion ratio of radial-inward-flow turbine; And
Sub-step C2, sends instruction to stator angle adjustment part (14), makes it increase guide vane opening gradually according to the angle fine tuning step-length preset, the actual expansion ratio of radial-inward-flow turbine is adjusted within the scope of the fine tuning of default expansion ratio.
12. according to claim 10ly determine expansion ratio rock gas radial-inward-flow turbine expansion power generation unit, it is characterized in that, send instruction in described step D to stator angle adjustment part (14), make it reduce to lead leaf divergence and comprise:
Sub-step D1, sends instruction to stator angle adjustment part (14), makes it reduce guide vane opening gradually according to the angle coarse adjustment steps preset, is adjusted in the Coarse adjustment range of default expansion ratio by the actual expansion ratio of radial-inward-flow turbine; And
Sub-step D2, sends instruction to stator angle adjustment part (14), makes it reduce guide vane opening gradually according to the angle fine tuning step-length preset, the actual expansion ratio of radial-inward-flow turbine is adjusted within the scope of the fine tuning of default expansion ratio.
13. determine expansion ratio rock gas radial-inward-flow turbine expansion power generation unit according to claim 11 or 12, and it is characterized in that, described angle coarse adjustment steps is 1 °, and described angle fine tuning step-length is 0.1 °.
14. according to claim 9ly determine expansion ratio rock gas radial-inward-flow turbine expansion power generation unit, it is characterized in that, in described step e, as actual flow Q
routside the first preset range, and time in the second preset range, send instruction to exciting current adjustment module (31) and comprise:
As actual flow Q
rat design discharge Q
dless than 80% time, send instruction to exciting current adjustment module (31), make it reduce field current, increase the rotating speed of generator set (30), and then increase radial-inward-flow turbine rotating speed gradually.
15. according to claim 14ly determine expansion ratio rock gas radial-inward-flow turbine expansion power generation unit, and it is characterized in that, described step e comprises:
Sub-step E1, instruction is sent to exciting current adjustment module (31), it is made to increase the rotating speed of generator in generator set (30) gradually according to the rotating speed coarse adjustment steps preset, and then increase radial-inward-flow turbine rotating speed gradually, the actual expansion ratio of radial-inward-flow turbine is adjusted in the Coarse adjustment range of default expansion ratio; And
Sub-step E2, instruction is sent to exciting current adjustment module (31), it is made to increase the rotating speed of generator in generator set (30) gradually according to the rotating speed fine tuning step-length preset, and then increase radial-inward-flow turbine rotating speed gradually, the actual expansion ratio of radial-inward-flow turbine is adjusted within the scope of the fine tuning of default expansion ratio;
Wherein, the rotating speed of described generator set (30) is obtained by described speed probe (25).
16. according to claim 15ly determine expansion ratio rock gas radial-inward-flow turbine expansion power generation unit, and it is characterized in that, described rotating speed coarse adjustment steps is 50r/min, and described rotating speed fine tuning step-length is 5r/min.
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| US5564895A (en) * | 1995-04-26 | 1996-10-15 | Rotoflow Corporation | Active automatic clamping control |
| CN101545403A (en) * | 2009-04-30 | 2009-09-30 | 上海交通大学 | Generator provided with switching catalytic combustion gas turbine |
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Effective date of registration: 20220228 Address after: 903, floor 9, building 3, No. 15, xidawang Road, Chaoyang District, Beijing 100022 Patentee after: Zhongke Jiulang (Beijing) Energy Technology Co.,Ltd. Address before: 100190, No. 11 West Fourth Ring Road, Beijing, Haidian District Patentee before: Institute of Engineering Thermophysics, Chinese Academy of Sciences |