CN205399533U - Large -duty loader formula cooling air automatic regulating system that induced drafts - Google Patents
Large -duty loader formula cooling air automatic regulating system that induced drafts Download PDFInfo
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- CN205399533U CN205399533U CN201620156885.9U CN201620156885U CN205399533U CN 205399533 U CN205399533 U CN 205399533U CN 201620156885 U CN201620156885 U CN 201620156885U CN 205399533 U CN205399533 U CN 205399533U
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Abstract
The utility model discloses a large -duty loader formula cooling air automatic regulating system that induced drafts, including engine cooling system, hydraulic power cooling system, hydraulic means cooling system and cooling air system, the cooling air system includes the aircraft bonnet air intake, the aircraft bonnet air outlet, the wind scooper, dc motor, induced draught fan, regulating unit, the wind scooper is fixed on the chassis frame on one side of radiator block and engine are relative, the central point that dc motor fixed at the wind scooper puts and is continuous with the vehicle -mounted storage battery of loader, regulating unit includes rotary speed controller, a single -chip microcomputer, still include the feed liquor pipe department that is located engine radiator respectively that links to each other with the singlechip, the hydraulic radiator enter oil pipe department, the thermocouple that enters oil pipe department of hydraulic pressure radiator. The utility model discloses a heat dissipation of induced drafting, induced draught fan is driven by dc motor, through automatic control system control induced draught fan's rotational speed, realizes the automatically regulated of cooling ventilating current volume.
Description
Technical field
This utility model relates to the loader technical field in engineering machinery, specifically a kind of large-duty loader air draught type cooling air automatic regulating system.
Background technology
Loader is a kind of restoration in earth-rock construction machinery being widely used in the construction projects such as highway, railway, building, water power, harbour, mine, and it is mainly used in the bulk materials such as shovel dress soil, sandstone, Calx, coal, it is possible to the slightly shovel such as Ore, pan soil is dug operation.
Each parts of loader all should work at optimum temperature, too high or too low for temperature, all can cause relatively early damaging and energy transition loss of machine components, even affect normal operation.The cooling system of loader is made up of engine cooling system, hydraulic power cooling system, hydraulic means cooling system and the multiple subsystem of cooling air system, and the Warm status of loader is by its workload is big, randomness is strong, thermal source is many and the impact of the more unfavorable factor such as changeable, poor working environment.Current Chinese large-sized loader all adopts forced heat radiation mode, its radiator fan is directly driven by electromotor, because rotation speed of the fan can not be regulated according to cooling requirements by engine speed restriction, space and position because installing these systems are very restricted again, make to also exist between each subsystem more complicated coupled relation, certain difficulty is brought to the design and installation of cooling system, when the higher and big load of ambient temperature works long hours, it occur frequently that superheating phenomenon, affect the normal operation of loader, even cause parts to damage.
Specifically, fan and electromotor directly connect that there are the following problems:
1. when hot environment and big working under load, coolant temperature is significantly high, and fan should increase heat radiation air quantity by high speed rotating, the specific heat load of enhancing system, but when adopting fan and engine direct connection structure, it is possible to mechanical part superheating phenomenon occurs not because of specific heat load, there is potential safety hazard.
2. when ambient temperature is relatively low, general coolant temperature is relatively low, and the specific heat load that system needs is less, sometimes fan work is not needed, when fan and electromotor direct connection, the waste of energy will be brought more greatly because of specific heat load, it is also possible to because temperature is too low, parts are adversely affected.
3. the power that fan consumes is directly proportional to the cube of its rotating speed, and when the big load operation of loader, rotation speed of the fan is accelerated to consume the effective power that electromotor is bigger, and this has a negative impact to completing big load operation.
4. fan can be only installed in the small space between radiator and electromotor, and air channel is unobstructed not, makes air flow resistance relatively big, the radiating effect of influential system.
5. electromotor, wind scooper must be separately fixed on vehicle frame, in order to avoid vehicle causes fan and fan housing to collide because of vibration, deformation at work, the radial clearance value of fan blade and fan housing is at least 15～20mm, because this gap width reduces more greatly the volumetric efficiency of fan, also the mechanical efficiency and the flow efficiency that make fan decrease, and cause its aggregate efficiency relatively low.
In China, loader design time, using loader cooling system as total system account for relatively fewer, and cooling system design and calculation method is also perfect not, wherein Study on Problems is also thorough not, and design has certain blindness, is inevitably present some design defect.The heat-sinking capability being typically designed is all bigger than normal, not only increases manufacturing cost but also waste fuel.Otherwise when hot environment and big load operation, superheating phenomenon will be there is, even affect normal operation.
Due to the restriction of technical conditions, the problems of excessive heat of loader is still one of principal element affecting its service behaviour, governs China's loader and keeps the large-scale development.In recent years, domestic and international many research worker have built up and have developed the three-dimensional computations hydrodinamical model of vehicle motor cooling air-flow, this model is applicable to the flowing of the air to cooling system and carries out detailed Calculation and Study, use for reference some research methoies of automobile, engineering machinery is also carried out, has inquired into the method for numerical simulation of air flowing in loader case.Loader independence cooling system air channel is optimized analysis by Zhang Hengbiao, Zhao Ming etc., by to the actual test in multiple air channel and sunykatuib analysis, the method determining Optimal improvements air channel, can pass through to improve loader cooling wind speed, improve the heat-sinking capability of cooling system.High temperature area loader cooling system has been improved by Zhang Birong etc., change the arrangement form of existing radiator, adopt water-oil cooler technology, change the former rearmounted form of fan into fan mid-, the loader cooling system that exploitation adapts to high temperature area has reference, also adopt system simulation technology, engineering machinery thermal management technology has been studied, propose some corrective measures for thermal balance question.New-energy automobile radiator fan drive system has been carried out simulation study by Zhang Cheng etc., and the actual control for vehicle-mounted radiator fan provides new thinking.Engine-cooling system is carried out analogue simulation by Zhou Bing, Li Xianghua etc., have studied the cooling system sensitivity to ambient temperature, cylinder heat dissipation capacity.Sheng Feng, Li Guofang etc. devise electric-controlled hydraulic cooling system, and this system according to the temperature change of cooling medium, can be adjusted according to predetermined control strategy, it is achieved the stepless speed regulation of fan.
Some large-scale engineering machinery manufacturing firms of China are also constantly trying to and improve the cooling system that research and development are novel, but yet there are no the best cooling system structure of performance recognized within the industry up till now and put into practical application.
Utility model content
This utility model technical issues that need to address are to provide the large-duty loader air draught type cooling air automatic regulating system of a kind of optimization, the rotating speed of fan can be automatically controlled, realize being automatically adjusted of cooling air delivery, meet loader under various operating modes, all can keep the requirement of good Warm status.
For solving above-mentioned technical problem, this utility model be the technical scheme is that
nullA kind of large-duty loader air draught type cooling air automatic regulating system，Including engine cooling system、Hydraulic power cooling system、Hydraulic means cooling system and cooling air system，Described engine cooling system includes the engine radiator for absorbing Engine Cylinder Wall heat、Contain the coolant reservoirs of coolant、Drive the water pump that the coolant in coolant reservoirs circulates between electromotor and engine radiator，Described hydraulic power cooling system includes the fluid power radiator for absorbing fluid torque-converter heat、Contain the oil sump of transmission oil、Drive the gear pump that the transmission oil in oil sump circulates between fluid torque-converter and fluid power radiator，Described hydraulic means cooling system includes the hydraulic pressure radiator for absorbing hydraulic means heat、Contain the fuel tank of hydraulic oil、Drive the oil pump that the hydraulic oil in fuel tank circulates between hydraulic means and hydraulic pressure radiator，Described engine radiator、Fluid power radiator、Hydraulic pressure radiator is arranged in the rear end face of electromotor，Form radiator panel，After improvement，
Described cooling air system includes hood air inlet, hood air outlet, wind scooper, dc motor, induced draught fan, regulon；Described hood air inlet is opened between electromotor and radiator panel on the hood of top and the chassis frame of lower section；Described hood air outlet is opened on the hood of radiator panel and electromotor opposite side；Described wind scooper is arranged on the side that radiator panel is relative with electromotor, and wind scooper is fixing with radiator panel and chassis frame to be connected；Described dc motor is fixed on the center of wind scooper and is connected with the Vehicular accumulator cell of loader；Described induced draught fan is connected to dc motor just on the output shaft of radiator panel side；The single-chip microcomputer that the rotational speed governor that described regulon includes being connected with dc motor is connected with rotational speed governor, also includes the thermocouple for measuring temperature at the oil inlet pipe place laying respectively at the feed tube place of engine radiator, the oil inlet pipe place of fluid power radiator, hydraulic pressure radiator being connected with single-chip microcomputer.
Above-mentioned large-duty loader air draught type cooling air automatic regulating system, arranges, between rear end face and the radiator panel of described electromotor, the dividing plate improving cooling airflow dynamic characteristic.
Above-mentioned large-duty loader air draught type cooling air automatic regulating system, the payload ratings of described large-duty loader is 5 tons, distance between rear end face and the radiator panel of electromotor is 500～600mm, and the distance of the rear end face of described radiator panel and wind scooper exit end face is 160～180mm.
Above-mentioned large-duty loader air draught type cooling air automatic regulating system, described single-chip microcomputer sets the ceiling temperature of engine cooling system, hydraulic power cooling system, the work of hydraulic means cooling system, the coolant ceiling temperature at engine radiator feed tube place is 95 DEG C, the transmission oil ceiling temperature at fluid power radiator oil inlet pipe place is 110 DEG C, and the hydraulic oil ceiling temperature at hydraulic pressure radiator oil inlet pipe place is 100 DEG C.
This utility model, after adopting technique scheme, has the effect of following technological progress:
This utility model is the Optimal improvements structure of a kind of loader cooling system, adopt air draught radiating mode, induced draught fan is driven by dc motor, rotating speed by automatic controlling system induced draught fan, realize being automatically adjusted of cooling air delivery, meet loader under various operating modes, all can keep the requirement of good Warm status.
This utility model compared with prior art has significant advantage, is embodied in the following aspects:
1. improve the reliability of loader.By being automatically adjusted of induced draught fan rotating speed, reach to control the purpose of specific heat load, make loader each system when any operating mode works all can be in optimum temperature range, it is to avoid component of machine is made be damaged because of too high or too low for temperature.Under manufacturing cost same with former type and working environment, each system temperature decline 2～4oC can be made.
2. improve the economy of loader.Adopting separate type fans drive mode, bring bigger motility to the mounting arrangements of parts each in hood, the position that can make them is more scientific and reasonable, it may be achieved the optimization design of cooling air runner；During or Smaller load relatively low in ambient temperature work, it is necessary to heat dissipation capacity less, rotation speed of the fan is relatively low, and consumed energy is less；Owing to the cooling air of air draught type radiating mode flows more smooth and easy, cooling air, when by radiator panel, is distributed more uniform everywhere, so air draught type radiating mode has better heat dispersion than bleed type at radiator panel；Adopting separate type fans drive mode, induced draught fan and wind scooper can be integrally attached on chassis frame as one, and the blade of induced draught fan and the radial clearance of fan housing can reduce, thus improving the volumetric efficiency of induced draught fan, make induced draught fan aggregate efficiency be improved.Adopting numerical method that cooling system is calculated emulation, result shows that this utility model consumes in equal-wattage situation at induced draught fan, and effective cooling air flow increases by more than 8%, and induced draught fan efficiency can improve more than 5%.Accordingly, it is capable to minimizing fuel consumption, improve the economy of loader.
3. improve the dynamic property of loader.Adopt this utility model, induced draught fan is powered by Vehicular accumulator cell, the power of not direct consumption of engine, improves the electromotor power to walking and equipment transmission, namely improve dynamic property during the big load operation of loader, approximate estimation can improve working performance more than 4%.
4. air draught type cooling air system structure also has simple in construction, advantage easy for installation.
Accompanying drawing explanation
Fig. 1 is fundamental diagram of the present utility model；
Fig. 2 is structural representation of the present utility model.
In figure, each label is expressed as: 1, electromotor, and 2, engine radiator, 3, fluid power radiator, 4, hydraulic pressure radiator, 5, dc motor, 6, induced draught fan, 7, wind scooper, 8, hood, 9, dividing plate, 10, water pump, 11, cylinder body water jacket, 12, cylinder cover water jacket, 13, outlet pipe, 14, thermostat, 15, partial circulating pipe, 16, fuel tank, 17, cleaner, 18, oil pump, 19, hydraulic means, 20, oil sump, 21, gear pump, 22, fluid torque-converter, 23, change speed gear box, 24, cooling air.
Detailed description of the invention
Below in conjunction with drawings and Examples, this utility model is described in further details:
A kind of large-duty loader air draught type cooling air automatic regulating system, fundamental diagram as shown in Figure 1 and structural representation as shown in Figure 2, including engine cooling system, hydraulic power cooling system, hydraulic means cooling system and cooling air system.
Described engine cooling system includes engine radiator 2, water pump 10, thermostat 14.Coolant is contained in coolant reservoirs, extracted by water pump 10 and enter cylinder body water jacket 11 through distributive pipe, electromotor 1 is cooled down by cylinder cover water jacket 12, then thermostat 14 is entered by outlet pipe 13, coolant enters engine radiator 2 afterwards, coolant, after heat is left by engine radiator 2, is again introduced into coolant reservoirs and enters next one circulation.When coolant temperature is relatively low, part or all of coolant can enter in coolant reservoirs through thermostat 14 and partial circulating pipe 15, constitutes coolant partial circulating；Wherein the water inlet pipe place of engine radiator 2 arranges the thermocouple measuring coolant temperature.
Described hydraulic power cooling system includes fluid power radiator 3, oil sump 20, gear pump 21.Transmission oil is contained in oil sump 20, under the driving of gear pump 21, the filtered device 17 of transmission oil flows through fluid torque-converter 22, the transmission oil of flowing absorbs the heat produced when fluid torque-converter 22 works, the fluid power radiator 3 of transmission oil entrance subsequently dispels the heat, and the transmission oil after heat radiation enters through change speed gear box 23 and carries out subsequent cycle in oil sump 20.Wherein, the oil inlet pipe place of fluid power radiator 3 arranges the thermocouple measuring transmission oil temperature.
Described hydraulic means cooling system includes hydraulic pressure radiator 4, fuel tank 16, oil pump 18.Hydraulic oil is contained in described fuel tank 16, hydraulic oil is under the driving of oil pump 18, the filtered device 17 of hydraulic oil enters hydraulic means 19, absorb the heat produced when hydraulic means 19 works, it is partly into hydraulic pressure radiator 4 through flow divider to be left by heat, it is again introduced into fuel tank 16 and carries out subsequent cycle, be directly entered fuel tank 16 through another part of flow divider and carry out subsequent cycle.The oil inlet pipe place of hydraulic pressure radiator 4 arranges the thermocouple measuring hydraulic fluid temperature.
Described engine radiator 2, fluid power radiator 3, hydraulic pressure radiator 4 couple for radiator panel with connection in series-parallel combining form.The surrounding of radiator panel is blocked, it is prevented that hot air reflux is to the import of radiator panel.Radiator panel is arranged in the correct position place of the rear end face of electromotor 1.
Described cooling air system includes hood air inlet, hood air outlet, wind scooper 7, dc motor 5, induced draught fan 6, regulon.Described hood air inlet is between electromotor 1 and radiator panel, including the lower air inlet on the enterprising air port of hood 8 above, the chassis frame that is positioned below.Described hood air outlet is arranged on hood 8 backmost, offers multiple air outlet as a grid.Described wind scooper 7 is fixed on the side that radiator panel is relative with electromotor 1, and the air inlet of wind scooper 7 and radiator panel are fixed.Described wind scooper 7 closes up from radiator panel side gradually to air outlet direction, and induced draught fan 6 is installed at the center of closing in.Induced draught fan 6 is arranged on inside the closing in of wind scooper 7, i.e. just side to radiator panel.Outlet (outside of closing up) the fixing dc motor 5 being joined directly together with induced draught fan 6 of wind scooper.Described dc motor 5 is provided energy by the Vehicular accumulator cell being installed on loader, and the capacity of Vehicular accumulator cell increases than former vehicle, with the power consumption requirement of satisfied driving induced draught fan 6.Described regulon includes the rotational speed governor being connected with dc motor 5, and rotational speed governor connects the single-chip microcomputer of a pre-write measurement and control program.Rotational speed governor accepts the control signal that single-chip microcomputer sends, for regulating the rotating speed of dc motor 5.Single-chip microcomputer is connected with three thermocouples at the above-mentioned oil inlet pipe place being arranged on the feed tube place of engine radiator 2, the oil inlet pipe place of fluid power radiator 3, hydraulic pressure radiator 4, for gathering the temperature signal of above-mentioned position.
Above-mentioned cooling air system, heat, under the driving of induced draught fan 6, through hood air inlet, radiator panel, wind scooper 7, induced draught fan 6, hood air outlet, is taken out of and is scattered in air by cooling air.The temperature signal that wherein regulon can gather according to thermocouple, compares with the temperature given value set, and forms control signal, sends into the rotational speed governor of dc motor 5, it is achieved being automatically adjusted of induced draught fan 6 rotating speed.When ambient temperature is relatively low, when needing heat dissipation capacity less, induced draught fan rotating speed can be allowed relatively low or do not turn.Technology requirement according to loader work and parts, the OK range of engine cooling system, hydraulic power cooling system, hydraulic means cooling system operating temperature can be set, automatic control system by regulating the rotating speed of induced draught fan 6, can make system temperature be maintained in the temperature range of requirement；Also can setting the higher limit of above-mentioned each heat dissipation subsystem temperature, generally set the ceiling temperature of engine coolant as 95 DEG C, the ceiling temperature of torque converter drive oil is 110 DEG C, and the ceiling temperature of hydraulic means hydraulic oil is 100 DEG C.Measured temperature compares formation control signal with set-point, take the temperature of engine coolant, transmission oil and hydraulic oil with the immediate temperature signal of its set-point as master signal, by regulating induced draught fan rotating speed, make the master signal temperature not higher than this system specialization.
Owing to adopting the air draught mode separated to dispel the heat, cooling system has bigger Installation Flexibility.Utilize Flow Field Numerical Calculation analytical technology to optimize cooling air runner physical dimension in hood, rationally determine the riding position of each parts.Such as the large-duty loader for 5 tons of payload ratings, the distance between rear end face and the radiator panel of electromotor 1 is 500～600mm, and the distance of the rear end face of radiator panel and wind scooper 7 exit end face is 160～180mm.In order to improve the flow behavior of cooling air, between rear end face and the radiator panel of electromotor 1, dividing plate 9 is set.
Cooling air flow and each system temperature simulation result are as shown in table 1, it can be seen that compared with prior art, radiating effect of the present utility model is greatly improved.
Table 1
Claims (4)
- null1. a large-duty loader air draught type cooling air automatic regulating system，Including engine cooling system、Hydraulic power cooling system、Hydraulic means cooling system and cooling air system，Described engine cooling system includes the engine radiator (2) for absorbing Engine Cylinder Wall heat、Contain the coolant reservoirs of coolant、Drive the water pump (10) that the coolant in coolant reservoirs circulates between electromotor (1) and engine radiator (2)，Described hydraulic power cooling system includes the fluid power radiator (3) for absorbing fluid torque-converter (22) heat、Contain the oil sump (20) of transmission oil、Drive the gear pump (21) that the transmission oil in oil sump (20) circulates between fluid torque-converter (22) and fluid power radiator (3)，Described hydraulic means cooling system includes the hydraulic pressure radiator (4) for absorbing hydraulic means (19) heat、Contain the fuel tank (16) of hydraulic oil、Drive the oil pump (18) that the hydraulic oil in fuel tank (16) circulates between hydraulic means (19) and hydraulic pressure radiator，Described engine radiator (2)、Fluid power radiator (3)、Hydraulic pressure radiator (4) is arranged in the rear end face of electromotor (1),Form radiator panel，It is characterized in that:Described cooling air system includes hood air inlet, hood air outlet, wind scooper (7), dc motor (5), induced draught fan (6), regulon；Described hood air inlet is opened on hood (8) and the chassis frame of lower section of top between electromotor (1) and radiator panel；Described hood air outlet is opened on the hood of radiator panel and electromotor (1) opposite side；Described wind scooper (7) is arranged on the side that radiator panel is relative with electromotor (1), and wind scooper (7) is fixing with radiator panel and chassis frame to be connected；Described dc motor (5) is fixed on the center of wind scooper (7) and is connected with the Vehicular accumulator cell of loader；Described induced draught fan is connected to dc motor just on the output shaft of radiator panel side；The single-chip microcomputer that the rotational speed governor that described regulon includes being connected with dc motor (5) is connected with rotational speed governor, also includes the thermocouple for measuring temperature at the oil inlet pipe place laying respectively at the feed tube place of engine radiator (2), the oil inlet pipe place of fluid power radiator (3), hydraulic pressure radiator (4) being connected with single-chip microcomputer.
- 2. a kind of large-duty loader air draught type cooling air automatic regulating system according to claim 1, it is characterised in that: the dividing plate (9) improving cooling airflow dynamic characteristic is set between rear end face and the radiator panel of described electromotor (1).
- 3. a kind of large-duty loader air draught type cooling air automatic regulating system according to claim 1 and 2, it is characterized in that: the payload ratings of described large-duty loader is 5 tons, distance between rear end face and the radiator panel of electromotor (1) is 500～600mm, and the distance of the rear end face of described radiator panel and wind scooper (7) exit end face is 160～180mm.
- 4. a kind of large-duty loader air draught type cooling air automatic regulating system according to claim 3, it is characterized in that: described single-chip microcomputer sets the ceiling temperature of engine cooling system, hydraulic power cooling system, the work of hydraulic means cooling system, the coolant ceiling temperature at engine radiator (2) feed tube place is 95 DEG C, the transmission oil ceiling temperature at fluid power radiator (3) oil inlet pipe place is 110 DEG C, and the hydraulic oil ceiling temperature at hydraulic pressure radiator (4) oil inlet pipe place is 100 DEG C.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620156885.9U CN205399533U (en) | 2016-03-02 | 2016-03-02 | Large -duty loader formula cooling air automatic regulating system that induced drafts |
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| CN201620156885.9U CN205399533U (en) | 2016-03-02 | 2016-03-02 | Large -duty loader formula cooling air automatic regulating system that induced drafts |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106494639A (en) * | 2016-12-16 | 2017-03-15 | 成都东科信航空自控设备有限公司 | aircraft engine cooler |
| CN107237681A (en) * | 2017-08-15 | 2017-10-10 | 桂林航天工业学院 | A kind of remarkable radiator of temperature reduction performance |
| CN111002819A (en) * | 2018-10-08 | 2020-04-14 | 郑州宇通客车股份有限公司 | Vehicle using blowing type heat sink |
| CN112172512A (en) * | 2020-10-14 | 2021-01-05 | 徐州徐工挖掘机械有限公司 | Heat dissipation system of engineering machinery and adjusting method of heat dissipation system |
| CN113062396A (en) * | 2021-04-09 | 2021-07-02 | 山推工程机械股份有限公司 | Aircraft bonnet and bull-dozer |
| CN115443814A (en) * | 2022-09-26 | 2022-12-09 | 潍柴雷沃智慧农业科技股份有限公司 | Heat dissipation method, system and medium for harvesting machine and agricultural machine |
-
2016
- 2016-03-02 CN CN201620156885.9U patent/CN205399533U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106494639A (en) * | 2016-12-16 | 2017-03-15 | 成都东科信航空自控设备有限公司 | aircraft engine cooler |
| CN107237681A (en) * | 2017-08-15 | 2017-10-10 | 桂林航天工业学院 | A kind of remarkable radiator of temperature reduction performance |
| CN111002819A (en) * | 2018-10-08 | 2020-04-14 | 郑州宇通客车股份有限公司 | Vehicle using blowing type heat sink |
| CN112172512A (en) * | 2020-10-14 | 2021-01-05 | 徐州徐工挖掘机械有限公司 | Heat dissipation system of engineering machinery and adjusting method of heat dissipation system |
| CN113062396A (en) * | 2021-04-09 | 2021-07-02 | 山推工程机械股份有限公司 | Aircraft bonnet and bull-dozer |
| CN115443814A (en) * | 2022-09-26 | 2022-12-09 | 潍柴雷沃智慧农业科技股份有限公司 | Heat dissipation method, system and medium for harvesting machine and agricultural machine |
| CN115443814B (en) * | 2022-09-26 | 2024-03-22 | 潍柴雷沃智慧农业科技股份有限公司 | Harvesting machine heat dissipation method, system, medium and agricultural machine |
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| C14 | Grant of patent or utility model | ||
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160727 Termination date: 20170302 |