CN103388676A - Efficient coupling variable-frequency speed regulating system and speed regulating method - Google Patents
Efficient coupling variable-frequency speed regulating system and speed regulating method Download PDFInfo
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- CN103388676A CN103388676A CN2013103217627A CN201310321762A CN103388676A CN 103388676 A CN103388676 A CN 103388676A CN 2013103217627 A CN2013103217627 A CN 2013103217627A CN 201310321762 A CN201310321762 A CN 201310321762A CN 103388676 A CN103388676 A CN 103388676A
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Abstract
The invention discloses an efficient coupling variable-frequency speed regulating system and a speed regulating method, wherein a hydraulic coupler for completing the mechanical energy transfer mainly consists of a speed change system and a regulation, lubrication and cooling system, the speed change system consists of a pump wheel and a turbine, the regulation, lubrication and cooling system consists of an oil pump, an oil pipeline, an oil cooler and a scoop pipe, an external oil pump and an oil overflow valve are additionally arranged outside a box body of the hydraulic coupler, an inlet of the external oil pump is communicated with an oil pool arranged at the lower part of the box body of the hydraulic coupler, an outlet of the external oil pump is communicated with an inlet pipeline of a lubricating oil cooler, and a mode of realizing the parallel connection between outlet pipelines of an auxiliary oil pump and a main oil pump is formed, and the oil overflow valve and the external oil pump form the series connection relationship. The efficient coupling variable-frequency speed regulating system and the speed regulating method can solve the technical problems to realize the effects that on the basis of not changing the internal structure of the hydraulic coupler and the connection mode of the existing electric motor, the hydraulic coupler and an auxiliary machine shaft system, an external oil system of the hydraulic coupler is modified, the variable-frequency regulation is realized, the work efficiency of an auxiliary machine transmission system of the hydraulic coupler is improved, and the like.
Description
Technical field
The invention belongs to AC asynchronous motor and drag the large-scale subsidiary engine of hydraulic couplers gear, transmission system and speed regulating methods such as pump, blower fan, compressor, rolling mill.
Background technique
The large-scale favourable turn such as pump, blower fan, compressor, rolling mill is the most popular subsidiary engines of industry such as oil, chemical industry, mine, metallurgy, electric power, and its air horsepower is more than 3000kW.Since China in 1978 introduces the hydraudynamic drive technology, hydraulic couplers comparatively is widely used on the gear of the high-power subsidiary engines such as the pump, blower fan, compressor, rolling mill of the industries such as oil, chemical industry, mine, metallurgy, electric power, and the present society recoverable amount is over 300,000.According to torque drive characteristics such as variable speed model hydraulic couplerss as can be known, Coupler transmission efficiency
(n
2: hydraulic couplers secondary speed, n
1The fluid coupling pump impeller rotating speed).In actual production, these pumps, blower fan, compressor, rolling mill are exerted oneself and can not be reached the equipment design load, even only have design load to obtain 60%, η lower than design load, and even less than 60%.Such 4～40% mechanical energy that are input on fluid coupling pump impeller will be converted into used heat; , for keeping the normal working temperature of Coupler, also to consume a large amount of electric energy and provide cooling water for it.The energy waste of working under the hydraulic couplers low-load is larger.
Along with the development of High-voltage Frequency Conversion Technology, the high high voltage converter of speed-regulating range width, efficiency is successful Application on the subsidiary engine of the industries such as oil, chemical industry, mine, metallurgy, electric power.But for the subsidiary engine that hydraulic couplers is installed, because device location is fixed, system connects complicated, install high voltage converter additional after removing hydraulic couplers, being subjected to axle is the restriction of connection, construction location, duration and gas, water system transformation again, and investment is large, the engineering difficulty is large, and success rate is low.For reducing the power consumption of these hydraulic couplers transmission subsidiary engines, reduce production of units total value energy consumption (" 12 " national planning is than the last reduction by 16% of Eleventh Five-Year Plan), it is very necessary adopting simple, reliable mode to carry out Frequency Conversion Modification to existing hydraulic couplers transmission auxiliary system.
The equipment that affect the mechanical energy transmission in existing hydraulic couplers transmission auxiliary system is hydraulic couplers, the regulation and control that the speed variator system that it mainly is comprised of pump impeller and turbine and oil pump, oil-piping, oil cooler and scoop tube form, lubricate, cooling system forms.Pump impeller and turbine are the primary components that hydraulic couplers mechanical energy is transmitted, and change its chamber trapped fuel amount, can change turbine output speed and air horsepower.Regulation and control, lubricated, cooling system regulation and control pump impeller and turbine trapped fuel amount, thus realize turbine stepless change output; The lubricant oil of necessity is provided for the rotatable parts of hydraulic couplers and service subsidiary engine thereof; By each oil temperature of oil cooler maintenance medium mechanical couple in predetermined range.
Summary of the invention
The purpose of this invention is to provide a kind of efficient coupling frequency conversion speed-adjusting system and speed regulating method, solving not changing hydraulic couplers internal structure and existing motor, hydraulic couplers, the subsidiary engine axle is on the basis of connecting mode, hydraulic couplers oil outer system is transformed, realize variable frequency adjustment, improve the technical problems such as hydraulic couplers transmission auxiliary system working efficiency.
In order to realize the foregoing invention purpose, the technical solution adopted in the present invention is as follows:
A kind of efficient coupling frequency conversion speed-adjusting system, the equipment of wherein completing the mechanical energy transmission is hydraulic couplers, and the regulation and control that the speed variator system that this hydraulic couplers mainly is comprised of pump impeller and turbine and oil pump, oil-piping, oil cooler and scoop tube form, lubricated, cooling system form; Install external oil pump and spill valve additional outside the hydraulic couplers casing; External oil pump entrance is connected with hydraulic couplers lower box oil sump; The outlet of external oil pump with lubricate the oil cooler inlet pipe and be connected, formation and main oil pump, auxiliary oil pump outlet conduit mode in parallel, lubricant oil enter between the kinematic pair of each bearing and hydraulic couplers driving gear, driven gear through lubricated oil cooler and lubricant oil feeding pipe road; Described spill valve and external oil pump form series relationship.
Described hydraulic couplers is connected in series frequency variator between power supply, lower circuit breaker and motor, during frequency control of motor speed, lower isolating switch on lower circuit breaker, frequency variator and frequency variator branch road is closed, and the by-pass switch that is attempted by frequency variator and lower isolating switch series arm disconnects.
A kind of efficient coupling frequency Varying and speed changing method, is characterized in that, utilizes described efficient coupling frequency conversion speed-adjusting system, and normally in service, under circuit breaker, frequency variator, isolating switch is closed, and by-pass switch disconnects; External oil pump and spill valve put into operation, and the auxiliary oil pump interlock is standby; Insert the scoop tube in chamber between fluid coupling pump impeller, turbine and be placed in maximum opening, keep the maximum oil-filled amount of chamber between fluid coupling pump impeller, turbine; Adjust the frequency variator output frequency, adjust the subsidiary engine rotating speed, thereby meet need of production; During frequency control of motor speed, AC asynchronous motor is accepted the Ac lower than work frequency of frequency variator input, and the AC asynchronous motor rotor rotates, by the hydraulic couplers driving gear with transmission of torque to driven gear, drive simultaneously main oil pump work; Fluid coupling pump impeller and driven gear are fixed on same axle, and by the working oil between pump impeller and turbine with transmission of torque to turbine; Turbine is by the axle with its rigid joint, with transmission of torque to subsidiary engine, thereby realized that the frequency control of motor speed of subsidiary engine efficiently moves.During this time, main oil pump coordinates with external oil pump, spill valve, keeps the required lubrication pressure of lubricating oil system and lubricants capacity; Pressure maintaining valve on main oil pump and working oil circulation loop matches with the pumping ability of fluid coupling pump impeller, turbine, by working oil cooler maintenance medium mechanical couple working oil in normal range (NR); In running, if frequency converter failure, circuit breaker and isolating switch disconnect, and the interlock by-pass switch is closed, and AC asynchronous motor continues to keep on the go; The hydraulic couplers scoop tube, from motion tracking subsidiary engine rotating speed, returns to this invention and uses front working state simultaneously.
Advantage of the present invention is:
Compare with traditional hydraulic couplers transmission Frequency Conversion Modification, need not remove hydraulic couplers or change Coupler pump impeller and turbine into be fixedly connected clutch, do not change shafting structure, do not need gas, water, oil system transformation to correspondence, the retrofit work amount is little, and the duration is short, invests little.
The present invention is not only applicable to the feed water pump group of fluid power couple drive, but also is applicable to the Frequency Conversion Modification of pump that the industry hydraulic couplerss such as oil, chemical industry, mine, metallurgy, electric power drive, blower fan, compressor, rolling mill, and is applied widely; In the situation that realize same function, do not need to remove by the shaft-driven main oil pump of hydraulic couplers input, do not need hydraulic couplers is disintegrated, to the maintainer without special technical requirement.
System is simple, when the hydraulic couplers main oil pump be the work oil pump, when lubricating pump splits, external oil pump only need arrange one, system connects simple.
Reliability is high, and external oil pump and auxiliary oil pump are standby each other.
Description of drawings
Fig. 1 is mechanical part structural representation of the present invention;
Fig. 2 is electric part connection diagram of the present invention.
Embodiment
The present invention does not need to change hydraulic couplers internal structure and existing motor, hydraulic couplers, the subsidiary engine axle is connecting mode, only hydraulic couplers external install additional one with the hydraulic couplers body in the external oil pump that is complementary of oil pump (auxiliary oil pump), external oil pump inlet pipe is connected to the fuel tank oil sump, outlet conduit is connected with lubricated oil cooler inlet pipe after by spill valve, thereby guaranteed that the subsidiary engine axle is that the required lubrication pressure of work is stable, realized simultaneously the output of hydraulic couplers turbine constant speed, the subsidiary engine axle is speed change output.Spill valve and external oil pump form series relationship.
The present invention is connected in series frequency variator 20 between power supply 22, lower circuit breaker 23 and motor 1, during frequency control of motor speed, lower isolating switch 19 closures on lower circuit breaker 23, frequency variator 20 and frequency variator branch road, be attempted by frequency variator 20 and disconnect with the by-pass switch 21 of lower isolating switch 19 series arms.Above circuit structure is referring to Fig. 2.
The present invention is normally in service, circuit breaker 23,20 times isolating switch 19 closures of frequency variator, and by-pass switch 21 disconnects; External oil pump 16 and spill valve 17 put into operation, and auxiliary oil pump 14 interlocks are standby; Insert the scoop tube 6 in chamber between fluid coupling pump impeller 7, turbine 8 and be placed in maximum opening, keep the maximum oil-filled amount of chamber between fluid coupling pump impeller 7, turbine 8.Adjust frequency variator 20 output frequencies, adjust subsidiary engine 11 rotating speeds, thereby meet need of production.During frequency control of motor speed, AC asynchronous motor 1 is accepted the Ac lower than work frequency of frequency variator 20 input, and AC asynchronous motor 1 rotor rotates, by hydraulic couplers driving gear 2 with transmission of torque to driven gear 5, drive simultaneously main oil pump 18 work; Fluid coupling pump impeller 7 is fixed on same axle with driven gear 5, and by the working oil between pump impeller 7 and turbine 8 with transmission of torque to turbine 8; Turbine 8 is by the axle with its rigid joint, with transmission of torque to subsidiary engine 11, thereby realized that the frequency control of motor speed of subsidiary engine efficiently moves.During this time, main oil pump 18 coordinates with external oil pump 16, spill valve 17, keeps the required lubrication pressure of lubricating oil system and lubricants capacity; Pressure maintaining valve on main oil pump 18 and working oil circulation loop 3 matches with the pumping ability of fluid coupling pump impeller 7, turbine 8, by working oil cooler 4 maintenance medium mechanical couple working oils in normal range (NR).
In running, if frequency variator 20 faults, circuit breaker 23 and isolating switch 19 disconnect, interlock by-pass switch 21 closures, and AC asynchronous motor continues to keep on the go; Hydraulic couplers scoop tube 6, from motion tracking subsidiary engine rotating speed, returns to this invention and uses front working state simultaneously.
Using method of the present invention:
(1) select reply subsidiary engine characteristic before frequency variator fully to analyze, select the permanent torque that characteristic with it is complementary or become torque output type frequency variator;
(2) selected frequency variator reliability is high, and performance parameter should meet the requirement of DL/T994-2006 " thermal power plant's high-voltage frequency converter for wind pump " and other technical standards;
(3) flow of selected external oil pump 16 should be consistent with the flow that hydraulic couplers lubricating oil system before transformation is distributed, and lift equates with former coupler system resistance;
(4) the oil spilling ability of selected spill valve 17 should be consistent with the flow of external oil pump 16, and bearing capacity is not less than 1.25 times of piping pressure maximum;
(5) external oil pump 16 inlet ducts, from the interface position of hydraulic couplers casing 10, should be able to guarantee oil pump trouble free service needs;
(6) oil spill pipe of spill valve 17 should access separately hydraulic couplers casing 10.
Claims (3)
1. efficient coupling frequency conversion speed-adjusting system, the equipment of wherein completing the mechanical energy transmission is hydraulic couplers, and the regulation and control that the speed variator system that this hydraulic couplers mainly is comprised of pump impeller and turbine and oil pump, oil-piping, oil cooler and scoop tube form, lubricated, cooling system form; It is characterized in that, install external oil pump and spill valve additional outside the hydraulic couplers casing; External oil pump entrance is connected with hydraulic couplers lower box oil sump; The outlet of external oil pump with lubricate the oil cooler inlet pipe and be connected, formation and main oil pump, auxiliary oil pump outlet conduit mode in parallel, lubricant oil enter between the kinematic pair of each bearing and hydraulic couplers driving gear, driven gear through lubricated oil cooler and lubricant oil feeding pipe road; Described spill valve and external oil pump form series relationship.
2. a kind of efficient coupling frequency conversion speed-adjusting system according to claim 1, it is characterized in that, described hydraulic couplers is connected in series frequency variator between power supply, lower circuit breaker and motor, during frequency control of motor speed, lower isolating switch on lower circuit breaker, frequency variator and frequency variator branch road is closed, and the by-pass switch that is attempted by frequency variator and lower isolating switch series arm disconnects.
3. efficient coupling frequency Varying and speed changing method, it is characterized in that, utilize the described efficient coupling frequency conversion speed-adjusting system of claim 1 or 2, normally in service, circuit breaker (23), lower isolating switch (19) closure of frequency variator (20), by-pass switch (21) disconnects; External oil pump (16) and spill valve (17) put into operation, and auxiliary oil pump (14) interlock is standby; Insert the scoop tube (6) in chamber between fluid coupling pump impeller (7), turbine (8) and be placed in maximum opening, keep the maximum oil-filled amount of chamber between fluid coupling pump impeller (7), turbine (8); Adjust frequency variator (20) output frequency, adjust subsidiary engine (11) rotating speed, thereby meet need of production; During frequency control of motor speed, AC asynchronous motor (1) is accepted the Ac lower than work frequency of frequency variator (20) input, AC asynchronous motor (1) rotor rotates, by hydraulic couplers driving gear (2) with transmission of torque to driven gear (5), drive simultaneously main oil pump (18) work; Fluid coupling pump impeller (7) and driven gear (5) are fixed on same axle, and by the working oil between pump impeller (7) and turbine (8) with transmission of torque to turbine (8); Turbine (8) is by the axle with its rigid joint, with transmission of torque to subsidiary engine (11), thereby realized that the frequency control of motor speed of subsidiary engine efficiently moves;
During this time, main oil pump (18) coordinates with external oil pump (16), spill valve (17), keeps the required lubrication pressure of lubricating oil system and lubricants capacity; Pressure maintaining valve on main oil pump (18) and working oil circulation loop (3) matches with the pumping ability of fluid coupling pump impeller (7), turbine (8), by working oil cooler (4) maintenance medium mechanical couple working oil in normal range (NR); In running, if frequency variator (20) fault, circuit breaker (23) and isolating switch (19) disconnect, interlock by-pass switch (21) closure, and AC asynchronous motor continues to keep on the go; Hydraulic couplers scoop tube (6), from motion tracking subsidiary engine rotating speed, returns to this invention and uses front working state simultaneously.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103939556A (en) * | 2014-02-09 | 2014-07-23 | 张文海 | Frequency-variable and energy-saving constant-oil-pressure automatic control system of fuel feed pump of fluid coupler |
| CN110474595A (en) * | 2019-08-16 | 2019-11-19 | 西安陕鼓动力股份有限公司 | A kind of air blower main oil pump control switching circuit and booting, method for handover control |
| CN113114007A (en) * | 2021-04-13 | 2021-07-13 | 硕维科技（杭州）有限公司 | Alternating current variable frequency speed regulation motor with internal circulation heat dissipation |
| CN114739051A (en) * | 2014-09-09 | 2022-07-12 | 开利公司 | Cooler compressor oil regulation |
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| CN202851324U (en) * | 2012-10-16 | 2013-04-03 | 湖南大唐先一能源管理有限公司 | Ensemble speed adjusting device for motor-driven feed pump and booster pump |
| CN202901206U (en) * | 2012-11-09 | 2013-04-24 | 北京电力设备总厂 | Hydraulic coupling and oil supply system thereof |
| CN203463636U (en) * | 2013-07-29 | 2014-03-05 | 北京中唐电工程咨询有限公司 | High-efficiency coupling variable-frequency speed adjusting system |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103939556A (en) * | 2014-02-09 | 2014-07-23 | 张文海 | Frequency-variable and energy-saving constant-oil-pressure automatic control system of fuel feed pump of fluid coupler |
| CN103939556B (en) * | 2014-02-09 | 2016-04-20 | 张文海 | The permanent oil pressure automatic control system of fluid coupling oil feed pump energy-saving and frequency-variable |
| CN114739051A (en) * | 2014-09-09 | 2022-07-12 | 开利公司 | Cooler compressor oil regulation |
| CN110474595A (en) * | 2019-08-16 | 2019-11-19 | 西安陕鼓动力股份有限公司 | A kind of air blower main oil pump control switching circuit and booting, method for handover control |
| CN113114007A (en) * | 2021-04-13 | 2021-07-13 | 硕维科技（杭州）有限公司 | Alternating current variable frequency speed regulation motor with internal circulation heat dissipation |
| CN113114007B (en) * | 2021-04-13 | 2022-03-29 | 硕维科技（杭州）有限公司 | Alternating current variable frequency speed regulation motor with internal circulation heat dissipation |
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Inventor after: Du Xianwei Inventor after: Liu Chaohong Inventor after: Hong Shaobin Inventor after: Zheng Shouzhong Inventor after: Leng Bo Inventor after: Hu Zhenjiang Inventor before: Su Yanai Inventor before: Du Xianwei Inventor before: Liu Chaohong Inventor before: Hong Shaobin Inventor before: Zheng Shouzhong Inventor before: Leng Bo Inventor before: Hu Zhenjiang |
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Application publication date: 20131113 |