CN101398007A - Energy-saving speed regulation method and device for high power fluid machinery - Google Patents
Energy-saving speed regulation method and device for high power fluid machinery Download PDFInfo
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Abstract
The invention pertains to the technical field of energy conservation and speed regulation, in particular to a energy conservation and speed regulation method applied to the flow regulation of a high-power fluid machinery and a device thereof; the device constructs a reasonable differential gear train to realize the split-power transfer on the basis of the property of composing and decomposing power (rotation speed) of a planetary gear train; the main power of a system is efficiently transferred in a mode of mechanical transmission by the differential gear train, and the split power is superimposed on the differential gear train by a speed regulating device so as to regulate an output rotation speed and to meet the full power speed regulation requirement by regulating speed with a small power. The method solves the problem that a converter motor can not be applied to the high-power speed regulation and combines the variable speed regulation and the throttle regulation simultaneously, which further reduces the output power of the motor, achieves an effect of saving energy and provides a solution for the problem that a fluid driven speeding regulating device can not be prevented from suffering power losses. The device can be used in the flow regulation of pumps and blowers and has the advantages of low cost, high reliability and good energy saving effect.
Description
Technical field
The invention belongs to the energy-saving speed regulating technique field, be specifically related to a kind of energy-saving speed regulation method and device that high power fluid machinery drives that be applied to.
Background technique
Pumps ﹠ Fans is a kind of mechanical energy to be converted into the potential energy of fluid and the power equipment of kinetic energy, is widely used in industries such as petrochemical industry, electric power, cement, coal, metallurgy, accounts for national energy consumption 30%.Power Plant in China is an electrical production unit, also is the power consumption rich and influential family, and the power consumption of its Pumps ﹠ Fans generally accounts for 5%-10% of generating total amount, and therefore energy-saving and cost-reducing research is significant about this kind equipment.
In power industry, because grid generation amounts at different levels and social power consumption (i.e. load) exist transient equilibrium, and power consumption is with social demand and season, the different variation round the clock, the thermal power plant must be adjusted generated energy at any time, therefore, relative water, wind, the consumption of coal also must change, and must regulate the flow of Pumps ﹠ Fans.In like manner, industries such as petrochemical industry, cement, metallurgy also must be regulated the flow of Pumps ﹠ Fans because of the variation of load.
The Flow-rate adjustment of Pumps ﹠ Fans mainly is that throttling adjusting and speed change are regulated.Throttling is regulated tradition and simply, is regulated flow with turning down valve opening with the way that changes the system head characteristics curve exactly.The change that this regulative mode is artificial the system head characteristics curve, improved the pressure head of system, caused a large amount of restriction losses.And speed change to regulate be under the constant situation of system resistance curve, reach required flow and pressure by the operation curve that changes Pumps ﹠ Fans, make pump and blower fan be in the efficiency operation district all the time, reduce the additional drag loss, reach better energy-saving effect.Based on these characteristics, high-power Pumps ﹠ Fans Flow-rate adjustment is advocated to regulate replacement conventional throttle adjusting comprehensively with speed change, becomes the energy-saving and cost-reducing in recent years important method of actively promoting.
At present, speed regulating method mainly contains variable-frequency motor speed governing and hydraulic speed-regulating both at home and abroad, and their common feature all is the full power speed governing.Frequency control of motor speed is used more under the operating mode of middle low power, and speed adjustable range is big, the efficient height, but under powerful situation,, use less owing to be subjected to the influence of technology, cost and reliability.Hydraulic speed-regulating normally utilizes sticking clutch of liquid or fluid coupling to carry out the adjustment of output speed, in powerful device, be widely used, cost is relatively low, but its speed control principle has determined its inevitable power loss, the linear decline of efficient and speed ratio, particularly efficient is low when revolutional slip is big, has bigger power loss, and its energy-saving effect is subjected to certain restriction.
Summary of the invention
The present invention is directed to existing high power fluid machinery when carrying out Flow-rate adjustment, the throttling regulation loss is big, the incomplete shortcoming of speed change regulation technology, and a kind of energy-saving speed regulation method and device that is used for high power fluid machinery is provided.
The method of the invention and device are based on planetary gear train and possess the characteristic that power (rotating speed) is synthetic and decompose, and realize dividing the transmission of power speed change by the structure differential gear train, regulate the Flow-rate adjustment of realization fluid machinery and energy-conservation in conjunction with throttling.System master's power transmits with the mechanical transmission form by differential gear train, divides power to be added to by arrangements for speed regulation and realizes the adjusting of output speed on the differential gear train, realizes the demand of full power speed governing with minute power speed control.
A kind of energy saving speed regulating device that is used for high power fluid machinery is characterized in that, described device is formed by becoming level differential gear system, branch power speed control unit, throttling regulon and the gearbox that ends with lock; In the described change grade differential gear system, the external tooth of the internal tooth of gear ring 7 and planet wheel 8 is meshed, the external tooth of gear ring 7 and the engagement of shifting slide gear 5 variable stages, and the internal tooth of planet wheel 8 and sun gear 9 engagements, shifting slide gear 5 is connected with shifting slide gear controller 4; The output shaft of main motor 1 is connected with the primary input axle 3 that becomes level differential gear system by first coupling 2, is delivered to gear ring 7 by shifting slide gear 5 and constitutes the input of differential gear owner power; In the described minute power speed control unit, drive hydraulic speed-regulating device 20, realize dividing the power speed control input by auxiliary-motor 21; The described gearbox that ends with lock is made up of axle locking engagement 17 and speed changer 18, divide the power speed control unit to link to each other with speed changer 18 by second coupling 19, the output of branch power speed control unit constitutes differential gear train through the speed changer 18 that ends gearbox with lock by secondary input shaft 16 driving planet carriers 6 and divides the power input; The input of two-way power is after change level differential gear system synthesizes, and sun gear 9 is exported as power is synthetic, is linked to each other with fluid machinery 10 by the 3rd coupling 13 by output shaft 14, realizes that power synthesizes and rotating speed synthesizes, and realizes speed change output; The throttling regulon of being made up of pipe throttle valve 11 and throttle valve controller 12 is installed on fluid machinery 10.
Described fluid machinery 10 comprises Pumps ﹠ Fans.
Described shifting slide gear 5 comprises two-stage speed change and the engagement of multi-stage gear speed change.
The power speed control unit comprised following implementation in described minute: adopt auxiliary-motor 21 and hydraulic speed-regulating device 20 to form and divide power input and speed governing, main motor 1 splitter section power and hydraulic speed-regulating device 20 compositions to divide power input and speed governing or variable-frequency motor to carry out power input and speed governing.
Described shifting slide gear controller 4, throttle valve controller 12, axle locking engagement 17 and branch power speed control unit are by control unit 15 Control work.
The present invention also provides a kind of energy-saving speed regulation method that is used for high power fluid machinery, it is characterized in that, may further comprise the steps:
(1) pipe throttle valve 11 is adjusted to maximum opening, the minimum gear engagement of the number of teeth is opened in shifting slide gear 5 and gear ring 7 external tooths, divides the power speed control unit to be in output torque minimum position, starts main motor 1;
(2) divide the power speed control unit to be set to maximum speed output, make system be in the rated power operating mode;
(3) convection cell machinery 10 carries out speed governing, and the branch following several stages is carried out:
A. reduction of speed is regulated: divide the power speed control unit to adopt auxiliary-motor and hydraulic speed-regulating device to form or main motor 1 splitter section power and hydraulic speed-regulating device composition form, when fluid machinery 10 needs of work reduce flow, control unit 15 sends instruction to hydraulic speed-regulating device 20, divide power speed control unit output speed to descend, the corresponding decline of system's output speed after change level differential gear system is synthetic, the corresponding decline of fluid machinery 10 output flows;
B. throttling is regulated: when a minute power speed control unit output speed reduced to 0, control unit 15 sent instruction to axle locking engagement 17, with speed changer 18 lockings, disconnected simultaneously and divided the power speed control unit; Control unit 15 sends instruction to throttle valve controller 12, the aperture of pilot line throttle valve 11, and the corresponding continuation of fluid machinery 10 output flows descends;
C. throttling adjusting again behind the reduction of speed: pipe throttle valve 11 apertures reach predefined value, and control unit 15 sends instruction to shifting slide gear controller 4, and mobile shifting slide gear 5 is adjusted the velocity ratios relation; Control unit 15 sends instruction to throttle valve controller 12, and throttle valve controller 12 pilot line throttle valve 11 apertures are adjusted to maximum, and keep fluid machinery 10 output flows constant this moment; Control unit 15 sends instruction to throttle valve controller 12, the aperture of pilot line throttle valve 11, and the corresponding continuation of fluid machinery 10 output flows descends;
D. reduction of speed is regulated after the throttling: pipe throttle valve 11 apertures reach predefined value, and control unit 15 sends instruction to axle locking engagement 12, and speed changer 13 is removed locking, start simultaneously and divide the power speed control unit; Control unit 15 sends instruction to throttle valve controller 12, and throttle valve controller 12 pilot line throttle valve 11 apertures are adjusted to maximum; Control unit 15 sends instruction to hydraulic speed-regulating device 20, divides power speed control unit output reverse speed, and the corresponding acquisition of system's output speed descends after change level differential gear system is synthetic, the corresponding continuation decline of fluid machinery 10 output flows.
The speed regulation process of described convection cell machinery 10 also is:
A. reduction of speed is regulated: divide the power speed control unit to adopt the variable-frequency motor form, when fluid machinery 10 needs of work reduce flow, control unit 15 sends instruction to a minute power speed control unit, divide power speed control unit output speed to descend, the corresponding decline of system's output speed after change level differential gear system is synthetic, the corresponding decline of fluid machinery 10 output flows;
B. oppositely speedup is regulated: when a minute power speed control unit output speed is 0, control unit 15 sends instruction to a minute power speed control unit, divide power speed control unit output speed reverse speedup, the corresponding decline of system's output speed after change level differential gear system is synthetic, the corresponding continuation of fluid machinery 10 output flows descends;
C. throttling is regulated: when minute power speed control unit reverse speedup of output speed reached rated speed, control unit 15 sent instruction to shifting slide gear controller 4, and mobile shifting slide gear 5 is adjusted the velocity ratio relation; Control unit 15 sends instruction to axle locking engagement 17, with speed changer 18 lockings, disconnects simultaneously and divides the power speed control unit; Control unit 15 sends instruction to throttle valve controller 12, the aperture of pilot line throttle valve 11, and the corresponding continuation of fluid machinery 10 output flows descends, and realizes that the throttling under the slow-speed of revolution condition is regulated.
The adjusting direction of described method is reversible.
Beneficial effect of the present invention is: described arrangements for speed regulation have solved the problem that variable-frequency motor can not be applied to high-power speed-adjusting, can be by the speed change demand that technology is ripe relatively, middle low power variable-frequency motor that cost is relatively low, reliability is higher satisfies powerful device, simultaneously, regulate and the pipe throttle adjusting in conjunction with speed change, to further reduce the output power of motor and reach energy-conservation effect, provide solution for reducing hydraulic speed-regulating device inevitable power loss in speed regulation process; The present invention can be used for the Flow-rate adjustment of pump and blower fan, has that cost is low, reliability is high, the characteristics of good energy-conserving effect.
Description of drawings
Fig. 1 is an energy saving speed regulating device structural representation of the present invention;
Fig. 2 is the schematic representation that concerns of hydraulic speed-regulating device working power and fluid machinery rotating ratio;
Fig. 3 regulates the engagement process schematic representation for dividing power hydraulic speed-regulating and throttling.
Number in the figure:
1-master's motor; 2-first coupling; 3-primary input axle; 4-shifting slide gear controller; The 5-shifting slide gear;
The 6-planet carrier; The 7-gear ring; The 8-planet wheel; The 9-sun gear; The 10-fluid machinery; 11-pipe throttle valve;
The 12-throttle valve controller; 13-the 3rd coupling; The 14-output shaft; The 15-control unit; The secondary input shaft of 16-;
17-axle locking engagement; The 18-speed changer; 19-second coupling; 20-hydraulic speed-regulating device; The 21-auxiliary-motor.
Embodiment
The invention provides a kind of energy-saving speed regulation method and device that is used for high power fluid machinery, the present invention will be further described below by description of drawings and embodiment.
The method of the invention and device are based on planetary gear train and possess the characteristic that power (rotating speed) is synthetic and decompose, and realize dividing the transmission of power speed change by the structure differential gear train, regulate the Flow-rate adjustment of realization fluid machinery and energy-conservation in conjunction with throttling.System master's power transmits with the mechanical transmission form by differential gear train, divides power to be added to by arrangements for speed regulation and realizes the adjusting of output speed on the differential gear train, realizes the demand of full power speed governing with minute power speed control.
Fig. 2 is the schematic representation that concerns of hydraulic speed-regulating device working power and fluid machinery rotating ratio.Wherein: P is the output power of motor, and N is the air horsepower of pump, and Δ N is the wasted power of system.As seen along with rotating speed descends, system loss power Δ N compares with the air horsepower of the actual demand of pump, and proportion is increasing.And the wasted power immediate cause is exactly the hydraulic speed-regulating device is the self-energy consumption that mode of speed regulation must occur, and is inevitable.
Fig. 3 regulates the engagement process schematic representation for dividing power hydraulic speed-regulating and throttling.Based on the synthetic speed control principle of minute power, will further reduce the output power of motor and reach energy-conservation effect in conjunction with speed governing and pipe throttle, provide solution for reducing the power loss of hydraulic speed-regulating device in speed regulation process.According to the Pumps ﹠ Fans operating mode, determine its normal revolution working zone and distribution, determine that several Key Points carries out following adjusting: also need reduce flow after dropping to 1 position as rotating speed, cut off the hydraulic speed-regulating device when then keeping output speed constant, then, hydraulic speed-regulating device self energy consumption cause the motor output power to reduce to N curve 1 ' position from former P curve 1 position because of disappearing, the needs that flow descends are then regulated by throttling, and its energy consumption curve is 1 '; When running to 2 positions by the throttling adjusting, adjust transmission system master power input velocity ratio, reduce the pump or fan input speed with mechanical drive mode, then the motor output power is reduced to N curve 2 ' position and is caused energy consumption decline from former P curve 2 positions, the needs that flow descends are then further regulated by throttling and are realized that its energy consumption curve is 2 ' .-3; The rest may be inferred, and can obtain energy consumption curve is 1-1 '-2-2 '-3-3 '-4 or the like, and its energy-saving effect is better than throttling adjusting and full power speed change regulating method.
Fig. 1 is the energy saving speed regulating device structural representation of high-power Pumps ﹠ Fans of the present invention.Described device is formed by becoming level differential gear system, branch power speed control unit, throttling regulon and the gearbox that ends with lock, and fluid machinery 10 uses Pumps ﹠ Fans; In the described change grade differential gear system, the external tooth of the internal tooth of gear ring 7 and planet wheel 8 is meshed, the external tooth of gear ring 7 and the engagement of shifting slide gear 5 variable stages, and the internal tooth of planet wheel 8 and sun gear 9 engagements, shifting slide gear 5 is connected with shifting slide gear controller 4; The output shaft of main motor 1 is connected with the primary input axle 3 that becomes level differential gear system by first coupling 2, is delivered to gear ring 7 by shifting slide gear 5 and constitutes the input of differential gear owner power; In the described minute power speed control unit, drive hydraulic speed-regulating device 20, realize dividing the power speed control input by auxiliary-motor 21; The described gearbox that ends with lock is made up of axle locking engagement 17 and speed changer 18, divide the power speed control unit to link to each other with speed changer 18 by second coupling 19, the output of branch power speed control unit constitutes differential gear train through the speed changer 18 that ends gearbox with lock by secondary input shaft 16 driving planet carriers 6 and divides the power input; The input of two-way power is after change level differential gear system synthesizes, and sun gear 9 is exported as power is synthetic, and output shaft 14 links to each other with the main shaft of Pumps ﹠ Fans by the 3rd coupling 13, realizes that power synthesizes and rotating speed synthesizes, and realizes speed change output; The throttling regulon of being made up of pipe throttle valve 11 and throttle valve controller 12 is installed on the output terminal of Pumps ﹠ Fans.Wherein, shifting slide gear controller 4, throttle valve controller 12, axle locking engagement 17 and branch power speed control unit are by control unit 15 Control work.
Divide the power speed control unit except that dividing power input and the speed governing above-mentioned the composition, also comprise two kinds of implementations: 1) adopt variable-frequency motor to carry out power input and speed governing with auxiliary-motor and hydraulic speed-regulating device; 2) main motor 1 splitter section power and hydraulic speed-regulating device are formed and are divided power input and speed governing.
When minute power speed control unit adopts auxiliary-motor and hydraulic speed-regulating device to form the implementation of branch power input and speed governing or main motor 1 splitter section power and power input of hydraulic speed-regulating device composition branch and speed governing, the flow of Pumps ﹠ Fans is regulated according to following steps:
(1) pipe throttle valve 11 is adjusted to maximum opening, the minimum gear engagement (accompanying drawing 1 position) of the number of teeth in the external tooth of shifting slide gear 5 and gear ring 7 divides the power speed control unit to be in output torque minimum position, starts main motor 1;
(2) divide the power speed control unit to be set to maximum speed output, make system be in the rated power operating mode;
(3) convection cell machinery 10 carries out Flow-rate adjustment, and the branch following several stages is carried out:
A. reduction of speed is regulated: divide the power speed control unit to adopt auxiliary-motor and hydraulic speed-regulating device to form or main motor 1 splitter section power and hydraulic speed-regulating device composition form, when fluid machinery 10 needs of work reduce flow, control unit 15 sends instruction to hydraulic speed-regulating device 20, divide power speed control unit output speed to descend, the corresponding decline of system's output speed after change level differential gear system is synthetic, the corresponding decline of fluid machinery 10 output flows;
B. throttling is regulated: when a minute power speed control unit output speed reduced to 0, control unit 15 sent instruction to axle locking engagement 17, with speed changer 18 lockings, disconnected simultaneously and divided the power speed control unit; Control unit 15 sends instruction to throttle valve controller 12, the aperture of pilot line throttle valve 11, and the corresponding continuation of fluid machinery 10 output flows descends;
C. throttling adjusting again behind the reduction of speed: pipe throttle valve 11 apertures reach predefined value, and control unit 15 sends instruction to shifting slide gear controller 4, and mobile shifting slide gear 5 (being moved to the left as accompanying drawing 1) is adjusted the velocity ratio relation; Control unit 15 sends instruction to throttle valve controller 12, and throttle valve controller 12 pilot line throttle valve 11 apertures are adjusted to maximum, and keep fluid machinery 10 output flows constant this moment; Control unit 15 sends instruction to throttle valve controller 12, the aperture of pilot line throttle valve 11, and the corresponding continuation of fluid machinery 10 output flows descends;
D. reduction of speed is regulated after the throttling: pipe throttle valve 11 apertures reach predefined value, and control unit 15 sends instruction to axle locking engagement 12, and speed changer 13 is removed locking, start simultaneously and divide the power speed control unit; Control unit 15 sends instruction to throttle valve controller 12, and throttle valve controller 12 pilot line throttle valve 11 apertures are adjusted to maximum; Control unit 15 sends instruction to hydraulic speed-regulating device 20, divides power speed control unit output reverse speed, and the corresponding acquisition of system's output speed descends after change level differential gear system is synthetic, the corresponding continuation decline of fluid machinery 10 output flows.
When minute power speed control unit 14 adopts variable-frequency motor to carry out the implementation of input of branch power and speed governing, the flow of Pumps ﹠ Fans is regulated according to following steps:
A. reduction of speed is regulated: divide the power speed control unit to adopt the variable-frequency motor form, when fluid machinery 10 needs of work reduce flow, control unit 15 sends instruction to a minute power speed control unit, divide power speed control unit output speed to descend, the corresponding decline of system's output speed after change level differential gear system is synthetic, the corresponding decline of fluid machinery 10 output flows;
B. oppositely speedup is regulated: when a minute power speed control unit output speed is 0, control unit 15 sends instruction to a minute power speed control unit, divide power speed control unit output speed reverse speedup, the corresponding decline of system's output speed after change level differential gear system is synthetic, the corresponding continuation of fluid machinery 10 output flows descends;
C. throttling is regulated: when minute power speed control unit reverse speedup of output speed reached rated speed, control unit 15 sent instruction to shifting slide gear controller 4, and mobile shifting slide gear 5 (being moved to the left as accompanying drawing 1) is adjusted the velocity ratio relation; Control unit 15 sends instruction to axle locking engagement 17, with speed changer 18 lockings, disconnects simultaneously and divides the power speed control unit; Control unit 15 sends instruction to throttle valve controller 12, the aperture of pilot line throttle valve 11, and the corresponding continuation of fluid machinery 10 output flows descends, and realizes that the throttling under the slow-speed of revolution condition is regulated.
The adjusting direction of described flow rate adjusting method is all reversible.
Claims (8)
1. an energy saving speed regulating device that is used for high power fluid machinery is characterized in that, described device is formed by becoming level differential gear system, branch power speed control unit, throttling regulon and the gearbox that ends with lock; In the described change grade differential gear system, the external tooth of the internal tooth of gear ring (7) and planet wheel (8) is meshed, the external tooth of gear ring (7) and the engagement of shifting slide gear (5) variable stage, the internal tooth of planet wheel (8) and sun gear (9) engagement, shifting slide gear (5) is connected with shifting slide gear controller (4); The output shaft of main motor (1) is connected with the primary input axle (3) that becomes level differential gear system by first coupling (2), is delivered to gear ring (7) by shifting slide gear (5) and constitutes the input of differential gear owner power; In the described minute power speed control unit, drive hydraulic speed-regulating device (20), realize dividing the power speed control input by auxiliary-motor (21); The described gearbox that ends with lock is made up of axle locking engagement (17) and speed changer (18), divide the power speed control unit to link to each other with speed changer (18) by second coupling (19), the output of branch power speed control unit constitutes differential gear train through the speed changer (18) that ends gearbox with lock by secondary input shaft (16) driving planet carrier (6) and divides the power input; The input of two-way power is after change level differential gear system synthesizes, and sun gear (9) is exported as power is synthetic, is linked to each other with fluid machinery (10) by the 3rd coupling (13) by output shaft (14), realizes that power synthesizes and rotating speed synthesizes, and realizes speed change output; Go up the throttling regulon that installation is made up of pipe throttle valve (11) and throttle valve controller (12) at fluid machinery (10).
2. a kind of energy saving speed regulating device that is used for high power fluid machinery according to claim 1 is characterized in that described fluid machinery (10) comprises Pumps ﹠ Fans.
3. a kind of energy saving speed regulating device that is used for high power fluid machinery according to claim 1 is characterized in that, described shifting slide gear (5) comprises two-stage speed change and the engagement of multi-stage gear speed change.
4. a kind of energy saving speed regulating device that is used for high power fluid machinery according to claim 1, it is characterized in that the power speed control unit comprised following implementation in described minute: adopt auxiliary-motor (21) and hydraulic speed-regulating device (20) to form and divide power input and speed governing, main motor (1) splitter section power and hydraulic speed-regulating device (20) composition to divide power input and speed governing or variable-frequency motor to carry out power input and speed governing.
5. a kind of energy saving speed regulating device that is used for high power fluid machinery according to claim 1, it is characterized in that described shifting slide gear controller (4), throttle valve controller (12), axle locking engagement (17) and branch power speed control unit are by control unit (15) Control work.
6. an energy-saving speed regulation method that is used for high power fluid machinery is characterized in that, may further comprise the steps:
(1) pipe throttle valve (11) is adjusted to maximum opening, the minimum gear engagement of the number of teeth is opened in shifting slide gear (5) and gear ring (7) external tooth, divides the power speed control unit to be in output torque minimum position, starts main motor (1);
(2) divide the power speed control unit to be set to maximum speed output, make system be in the rated power operating mode;
(3) convection cell machinery (10) carries out speed governing, and the branch following several stages is carried out:
A. reduction of speed is regulated: divide the power speed control unit to adopt auxiliary-motor and hydraulic speed-regulating device to form or main motor (1) splitter section power and hydraulic speed-regulating device composition form, when fluid machinery (10) need of work reduces flow, control unit (15) sends instruction to hydraulic speed-regulating device (20), divide power speed control unit output speed to descend, the corresponding decline of system's output speed after change level differential gear system is synthetic, the corresponding decline of fluid machinery (10) output flow;
B. throttling is regulated: when a minute power speed control unit output speed reduced to 0, control unit (15) sent instruction to axle locking engagement (17), with speed changer (18) locking, disconnected simultaneously and divided the power speed control unit; Control unit (15) sends instruction to throttle valve controller (12), the aperture of pilot line throttle valve (11), and the corresponding continuation of fluid machinery (10) output flow descends;
C. throttling adjusting again behind the reduction of speed: pipe throttle valve (11) aperture reaches predefined value, and control unit (15) sends instruction to shifting slide gear controller (4), and mobile shifting slide gear (5) is adjusted the velocity ratio relation; Control unit (15) sends instruction to throttle valve controller (12), and throttle valve controller (12) pilot line throttle valve (11) aperture is adjusted to maximum, and keep fluid machinery (10) output flow constant this moment; Control unit (15) sends instruction to throttle valve controller (12), the aperture of pilot line throttle valve (11), and the corresponding continuation of fluid machinery (10) output flow descends;
D. reduction of speed is regulated after the throttling: pipe throttle valve (11) aperture reaches predefined value, and control unit (15) sends instruction to axle locking engagement (12), and speed changer (13) is removed locking, starts simultaneously to divide the power speed control unit; Control unit (15) sends instruction to throttle valve controller (12), and throttle valve controller (12) pilot line throttle valve (11) aperture is adjusted to maximum; Control unit (15) sends instruction to hydraulic speed-regulating device (20), divides power speed control unit output reverse speed, and the corresponding acquisition of system's output speed descends after change level differential gear system is synthetic, the corresponding continuation decline of fluid machinery (10) output flow.
7. a kind of energy-saving speed regulation method that is used for high power fluid machinery according to claim 6 is characterized in that, the speed regulation process of described convection cell machinery (10) also is:
A. reduction of speed is regulated: divide the power speed control unit to adopt the variable-frequency motor form, when fluid machinery (10) need of work reduces flow, control unit (15) sends instruction to a minute power speed control unit, divide power speed control unit output speed to descend, the corresponding decline of system's output speed after change level differential gear system is synthetic, the corresponding decline of fluid machinery (10) output flow;
B. oppositely speedup is regulated: when a minute power speed control unit output speed is 0, control unit (15) sends instruction to a minute power speed control unit, divide power speed control unit output speed reverse speedup, the corresponding decline of system's output speed after change level differential gear system is synthetic, the corresponding continuation of fluid machinery (10) output flow descends;
C. throttling is regulated: when minute power speed control unit reverse speedup of output speed reached rated speed, control unit (15) sent instruction to shifting slide gear controller (4), and mobile shifting slide gear (5) is adjusted the velocity ratio relation; Control unit (15) sends instruction to axle locking engagement (17), with speed changer (18) locking, disconnects simultaneously and divides the power speed control unit; Control unit (15) sends instruction to throttle valve controller (12), the aperture of pilot line throttle valve (11), and the corresponding continuation of fluid machinery (10) output flow descends, and realizes that the throttling under the slow-speed of revolution condition is regulated.
8. a kind of energy-saving speed regulation method that is used for high power fluid machinery according to claim 6 is characterized in that the adjusting direction of described method is reversible.
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| CN107202695B (en) * | 2017-07-25 | 2019-02-05 | 太原理工大学 | A kind of large torque liquid viscous couplings experimental rig |
| CN108443435A (en) * | 2018-04-02 | 2018-08-24 | 大连碧蓝节能环保科技有限公司 | Planetary gear stepless speed changing speed increaser |
| CN114856888A (en) * | 2022-05-17 | 2022-08-05 | 张新娥 | Intelligent hydroelectric generation device adopting grading power generation mode |
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