CN105972194B - A kind of lubricating and cooling system for vehicle gear box - Google Patents
A kind of lubricating and cooling system for vehicle gear box Download PDFInfo
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- CN105972194B CN105972194B CN201610490698.9A CN201610490698A CN105972194B CN 105972194 B CN105972194 B CN 105972194B CN 201610490698 A CN201610490698 A CN 201610490698A CN 105972194 B CN105972194 B CN 105972194B
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- gear box
- lubricating
- temperature
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- 238000001816 cooling Methods 0.000 title claims abstract description 46
- 230000001050 lubricating effect Effects 0.000 title claims abstract description 28
- 239000007788 liquid Substances 0.000 claims abstract description 154
- 239000002828 fuel tank Substances 0.000 claims abstract description 73
- 238000005259 measurement Methods 0.000 claims description 14
- 238000000605 extraction Methods 0.000 claims description 8
- 239000002245 particle Substances 0.000 claims description 8
- 239000000284 extract Substances 0.000 claims description 7
- 238000001914 filtration Methods 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 7
- 230000005540 biological transmission Effects 0.000 claims 1
- 239000003921 oil Substances 0.000 abstract description 307
- 239000010687 lubricating oil Substances 0.000 abstract description 23
- 238000005461 lubrication Methods 0.000 abstract description 6
- 238000009825 accumulation Methods 0.000 abstract description 5
- 239000012535 impurity Substances 0.000 description 18
- 239000003638 chemical reducing agent Substances 0.000 description 6
- 230000003134 recirculating effect Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 230000005484 gravity Effects 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- 239000012530 fluid Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000011897 real-time detection Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000010705 motor oil Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/0412—Cooling or heating; Control of temperature
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/0402—Cleaning of lubricants, e.g. filters or magnets
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/0402—Cleaning of lubricants, e.g. filters or magnets
- F16H57/0404—Lubricant filters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/0405—Monitoring quality of lubricant or hydraulic fluids
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/0434—Features relating to lubrication or cooling or heating relating to lubrication supply, e.g. pumps; Pressure control
- F16H57/0436—Pumps
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Quality & Reliability (AREA)
- General Details Of Gearings (AREA)
Abstract
The invention discloses a kind of lubricating and cooling systems for vehicle gear box, it include: fuel tank, oil-feed pump, the first variable-frequency motor, the first temperature sensor, scavenge oil pump, the second variable-frequency motor and controller, the first variable-frequency motor is for driving oil-feed pump to extract the oil inlet that oil liquid is input to vehicle gear box from fuel tank；First temperature sensor is used to measure the oil liquid temperature in fuel tank；Controller is for various sensor signals in acquisition system and gives and the feedback such as controls, alarms.Lubrication when working at low ambient temperatures the present invention is especially suitable for vehicle, controller controls the work of the first variable-frequency motor in low or first gear under low temperature environment；So that the torque of the first variable-frequency motor and the viscosity of oil is matched, extends electrical machinery life.By the way that scavenge oil pump is arranged, the lubricating oil accumulated in gear-box can be extracted, accumulation of the lubricating oil in gear-box is efficiently avoided.
Description
Technical field
The present invention relates to vehicle gear box cooling system more particularly to a kind of lubrication systems for vehicle gear box
System.
Background technique
With the development of exploitation of mineral resources industry, large-tonnage engineering truck demand is increasing, on large-tonnage engineering truck
Hub reduction gear driving power in gear-box is big and compact-sized, causes gear-box calorific value very high, reducer shell heat dissipation
Can not fully meet cooling requirement, part large-tonnage engineering truck retarder start to be lubricated by the way of outer circulation fuel feeding and
It is cooling.
Application No. is 201320815164.0 Chinese patents to disclose a kind of wheel side speed reducer lubrication cooling system, including
Hydraulic pressure pump group, driving unit, filter element and cooling unit, driving unit are connect with hydraulic pressure pump group, the inlet port of hydraulic pressure pump group
It is connected by the oil outlet of oil pipe and wheel side speed reducer, the oil outlet of hydraulic pressure pump group is connected by the oil inlet of oil circuit and filter element
Connect, the oil outlet of filter element is connected by the oil inlet of oil circuit and cooling unit, the oil outlet of cooling unit by oil circuit with
The oil inlet of wheel side speed reducer connects.The patent uses single oil pump by the way that lubrication cooling system is arranged on wheel side speed reducer
In gear-box oil inlet fuel feeding, oil return opening gravity oil return.Solves the insufficient technology of traveling vehicle wheel side speed reducer lubrication heat dissipation
Problem.But the prior art has the following problems:
(1) lower with lubricating oil inlet oil temperature due to cooling, when starting lubricating system at low temperature, oil when oil temperature is very low
Viscosity is big, especially since vehicle general work is outdoor, under the low-down extreme case of environment temperature, oily viscosity is very
Greatly, unsmooth so as to cause gravity oil return, cause lubricating oil to be constantly deposited in inside gear-box, make to be formed inside gear-box high pressure from
And oil liquid is caused to be revealed, and long-time internal high pressure can bring damage to sealing element；
(2) existing oil pump driving motor torque is fixed, since in high temperature and cold-starting, oil viscosity differs greatly,
Start motor when low temperature, actually required torque is greater than Rated motor torque, and motor is not easy to start and be easily damaged；And it is opened under high temperature
Dynamic motor, actually required torque are much smaller than Rated motor torque.
Summary of the invention
To solve the above-mentioned problems, the present invention provides a kind of lubricating and cooling systems for vehicle gear box, comprising: oil
Case, oil-feed pump, the first variable-frequency motor, the first temperature sensor, scavenge oil pump, the second variable-frequency motor and controller, wherein
For driving the oil-feed pump to extract oil liquid from the fuel tank, the oil liquid of extraction passes through first variable-frequency motor
Oil inlet pipe is input to the oil inlet of vehicle gear box；
First temperature sensor is used to measure the oil liquid temperature in the fuel tank；
The oil liquid of the oil liquid that second variable-frequency motor is used to that the scavenge oil pump to be driven to extract in vehicle gear box, extraction is logical
It crosses oil return line and enters the fuel tank；
The controller is used to obtain the oil liquid temperature of the first temperature sensor acquisition, and according to the oil liquid temperature
Adjust the revolving speed of first variable-frequency motor.
It further, further include heater, the heater is for heating the oil liquid in the fuel tank；The control
Device processed is also used to when the oil liquid temperature is lower than preset threshold value, controls the heater work, and in the oil liquid temperature
When higher than preset threshold value, controls the heater and stop working.
It further, further include cooler, the cooler is arranged in the oil inlet pipe, for cooling down the oil inlet
Oil liquid in pipeline.
It further, further include thermostat valve and the first branch, the first branch and the oil inlet pipe are in parallel；The temperature
Control valve is used to open valve when the temperature of measurement is higher than preset threshold value, makes the oil inlet pipe where oil liquid from the cooler
Outflow, and valve is closed when the temperature of measurement is not higher than preset threshold value, so that oil liquid is not passed through the cooler, from described
First branch outflow.
Further, the controller is also used to the temperature in first temperature sensor measurement lower than preset threshold value
When control the cooler and stop working.
It further, further include second temperature sensor, the second temperature sensor is for measuring the oil return line
In oil liquid temperature；The controller is also used to adjust second variable-frequency motor according to the oil liquid temperature in the oil return line
Revolving speed.
Further, pressure sensor is additionally provided in the oil inlet pipe, the pressure sensor is described for measuring
Oil liquid pressure in oil inlet pipe；
It further include overflow valve and second branch, the overflow valve is arranged in the second branch, and the overflow valve is used for
It is opened when the oil liquid pressure of pressure sensor measurement is higher than preset threshold value, oil liquid is made to flow back to oil from the second branch
Case.
Further, filter is additionally provided in the oil inlet pipe, the filter is used for in the oil inlet pipe
Oil liquid be filtered.
It further, further include differential pressure transmitter device, the differential pressure transmitter device is for measuring the filter two sides
Alarm signal is sent to controller when pressure difference is greater than the set value, the controller is used to receive the differential pressure transmitter device hair
Standby signal is issued after the alarm signal sent.
It further, further include liquid-level switch, the liquid-level switch is arranged in the fuel tank, for sensing the fuel tank
The height of middle oil liquid.
Further, air filter is additionally provided on the fuel tank, the air filter is used for entrance fuel tank
Air is filtered.
Further, online particle collector is additionally provided in the oil return line, the online particle collector is used for
Measure the cleannes of oil liquid in oil return line.
Further, filter screen is additionally provided in the fuel tank, the lower section of the oil return line is arranged in the filter screen.
Further, oil inlet flowmeter is additionally provided in the oil inlet pipe, the oil inlet flowmeter is described for measuring
Oil liquid flow in oil inlet pipe；Return flow meter is additionally provided in the oil return line, the return flow meter is for measuring
Oil liquid flow in the oil return line；The controller is also used to the measurement according to the oil inlet flowmeter and return flow meter
As a result the revolving speed of first variable-frequency motor and the second variable-frequency motor is adjusted.
It further, further include the first check valve and second one-way valve；First check valve is arranged in the oil inlet pipe
On the road, the oil liquid one-way flow for extracting the oil-feed pump；The second one-way valve is arranged on the oil return line, uses
In the oil liquid one-way flow for extracting the scavenge oil pump.
It further, further include third temperature sensor, the third temperature sensor setting is leaned in the oil inlet pipe
One end of the nearly vehicle gear box, for measuring the temperature of oil liquid in oil inlet pipe.
Further, the filter screen is magnetic filtration screen.
The invention has the following beneficial effects:
(1) present invention is by setting the first temperature sensor and the first variable-frequency motor, being capable of oil in real-time monitoring fuel tank
Temperature adjusts the revolving speed of the first variable-frequency motor according to oil temperature, the first variable-frequency motor when high temperature and low temperature is made to work at different rates,
To make motor work on suitable revolving speed, motor is protected, the service life of motor is extended.The present invention is especially suitable in low temperature ring
In border, when the oil temperature in fuel tank is lower than preset temperature, controller controls the work of the first variable-frequency motor in low or first gear；Work as fuel tank
In oil temperature be higher than preset temperature when, controller control the first variable-frequency motor work in top gear, to make the first variable-frequency electric
The torque of machine and the viscosity of oil match, to extend electrical machinery life.
(2) present invention setting having heaters, can be heated to suitable temperature for oil when the oil temperature in fuel tank is too low,
Facilitate oil liquid flowing, reduce oil liquid viscosity, to effectively mitigate the pressure of the first variable-frequency motor of oil-feed pump.
(3) present invention is provided with scavenge oil pump, can extract the lubricating oil accumulated in gear-box, promotes to make the profit in gear-box
Lubricating oil successfully flows back in fuel tank, efficiently avoids accumulation of the lubricating oil in gear-box.To solve in the prior art
Lubricating oil is deposited in inside gear-box, makes to be formed high pressure inside gear-box so as to cause oil liquid leakage, and internal for a long time high
The problems such as crushing bad gearbox seals part.Lubrication when working at low ambient temperatures the present invention is especially suitable for vehicle, in low temperature
When lower starting lubricating system, the viscosity of oil is big when oil temperature is very low, unsmooth so as to cause gravity oil return, and lubricating oil is caused constantly to accumulate
Inside gear-box, make to be formed high pressure inside gear-box so as to cause oil liquid leakage, and long-time internal high pressure can be to sealing element
Bring damage.Scavenge oil pump is set, the lubricating oil accumulated in gear-box can be extracted, promotion makes the lubricating oil in gear-box successfully
It flows back in fuel tank, efficiently avoids accumulation of the lubricating oil in gear-box.
(4) present invention is provided with thermostat valve and cooler, and when thermostat valve detects that oil temperature is higher, control oil liquid flows through cooling
Device is cooling, and when oil temperature is not high, control oil liquid is flowed out from the branch in parallel with cooler, to efficiently control oil inlet pipe output
Oil temperature be maintained at reasonable temperature range, improve the cooling effect of system.
(5) present invention provides setting second temperature sensor and the second variable-frequency motor, can be adjusted according to the temperature of oil return
The revolving speed of second variable-frequency motor makes the second variable-frequency motor when high temperature and low temperature work at different rates, so that motor be made to work
On suitable revolving speed, motor is protected, the service life of motor is extended.
(6) present invention is provided with pressure sensor in oil inlet pipe, and overflow valve is arranged, when the oil pressure in oil inlet pipe
When excessively high, a part of oil liquid is discharged by overflow valve, to improve by the oil pressure cntrol in oil inlet pipe in reasonable range
The safety and stability of system.
(7) filter is arranged in the present invention in oil inlet pipe, can effectively be filtered to the oil liquid in oil inlet pipe,
To filter out the impurity in oil inlet pipe, the purity of oil liquid is improved, the impurity being effectively prevented from oil liquid makes vehicle gear box
At damage.
(8) present invention is provided with differential pressure transmitter device at the both ends of filter, and differential pressure transmitter device passes through measurement filter two sides
Oil liquid pressure it is poor, provide the information of filter, such as whether filter work normal, if need replacing filter core, thus
Useful information is provided for user, guarantees that filter works normally, improves the stability of system.
(9) liquid-level switch is arranged in the present invention in fuel tank, is capable of providing liquid level information, when liquid level is too low, controller control
System stalls processed, to avoid because liquid level is too low damage caused by oil-feed pump；When the oil liquid in fuel tank is excessively high, issue
Warning message reminds operator to be adjusted oil liquid, to be effectively protected oil-feed pump, improves the safety of system.
(10) air filter is arranged in the present invention on fuel tank, can be filtered to the air for entering fuel tank, avoid sky
Dust, impurity in gas enter fuel tank, ensure that the purity of oil liquid, and the impurity being effectively prevented from oil liquid makes vehicle gear box
At damage.
(11) online particle collector is arranged in the present invention in oil return line, and the impurity that can be monitored in real time in oil return contains
Amount, remind operator replace the oil liquid in fuel tank in time when impurity content is higher, avoid the oil liquid contained a large amount of impurities into
Enter in vehicle gear box, vehicle gear box is damaged.
(12) magnetic filtration screen is arranged in the present invention in fuel tank, since impurity iron-containing in vehicle gear box is more, uses
Magnetic filtration screen can effectively adsorb the impurity in oil return.
(13) present invention also sets up oil inlet flowmeter in oil inlet pipe, and return flow meter, energy are arranged in oil return line
Enough detect oil inlet quantity and recirculating oil quantity.In addition, controller is adjusted according to the measurement result of the oil inlet flowmeter and return flow meter
The revolving speed of first variable-frequency motor and the second variable-frequency motor, when the difference of oil inlet quantity and recirculating oil quantity is excessive, adjustment first becomes
Frequency motor low-speed running, so that oil inlet quantity and recirculating oil quantity be made to be maintained in reasonable range.
(14) present invention provides setting third temperature sensor, being capable of real-time detection inlet oil temperature.
Detailed description of the invention
It in order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology and advantage, below will be to implementation
Example or attached drawing needed to be used in the description of the prior art are briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is only some embodiments of the present invention, for those of ordinary skill in the art, without creative efforts,
It can also be obtained according to these attached drawings other attached drawings.
Fig. 1 is the structural schematic diagram for the system that the embodiment of the present invention one provides；
Fig. 2 is the structural schematic diagram of system provided by Embodiment 2 of the present invention；
In figure: 1- fuel tank, 2- heater, the first temperature sensor of 3-, 4- liquid-level switch, 5- air filter, 6- oil inlet
Pump, the first variable-frequency motor of 7-, the first check valve of 8-, 9- overflow valve, 10- differential pressure transmitter device, 11- filter, 12- thermostat valve, 13-
Cooler, 14- third temperature sensor, 15- pressure sensor, 16- oil inlet flowmeter, the second variable-frequency motor of 17-, 18- oil return
Pump, 19- second one-way valve, 20- return flow meter, 21- second temperature sensor, the online particle collector of 22-, 23- filter screen,
24- controller.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art without making creative work it is obtained it is all its
His embodiment, shall fall within the protection scope of the present invention.
Embodiment one:
As shown in Figure 1, the present invention provides a kind of lubricating and cooling systems for vehicle gear box, comprising: fuel tank 1, into
Oil pump 6, the first variable-frequency motor 7, the first temperature sensor 3, scavenge oil pump 18, the second variable-frequency motor 17 and controller 24.
First variable-frequency motor 7 is for driving the oil-feed pump 6 to extract oil liquid, the oil liquid of extraction from the fuel tank 1
The oil inlet of vehicle gear box is input to by oil inlet pipe；Wherein, oil liquid be for vehicle gear box be lubricated with it is cold
But lubricating fluid, viscosity is very big at low temperature for oil liquid.Heretofore described oil liquid refers to for moistening to vehicle gear box
Sliding lubricating oil.
First temperature sensor 3 is arranged in fuel tank, for measuring the oil liquid temperature in the fuel tank 1.
The oil liquid that second variable-frequency motor 17 is used to that the scavenge oil pump 18 to be driven to extract in vehicle gear box, the oil of extraction
Liquid enters the fuel tank 1 by oil return line.Specifically, the oil outlet of vehicle gear box is arranged in scavenge oil pump 18.By
Use lubricating oil inlet oil temperature lower in cooling, when starting lubricating system at low temperature, the viscosity of oil is big when oil temperature is very low, to lead
It causes gravity oil return unsmooth, lubricating oil is caused constantly to be deposited in inside gear-box, make to be formed high pressure inside gear-box so as to cause oil
Liquid leakage, and long-time internal high pressure can bring damage to sealing element.Scavenge oil pump 18 is set, can extract and to be accumulated in gear-box
Lubricating oil, promotion flow back to the lubricating oil in gear-box successfully in fuel tank, efficiently avoid lubricating oil in gear-box
Accumulation.
Oil liquid temperature in fuel tank of the controller 24 for obtaining the acquisition of the first temperature sensor 3, and according to
The oil liquid temperature adjusts the revolving speed of first variable-frequency motor 7.
Specifically, the revolving speed of the first variable-frequency motor 7 is adjustable, for example, can have top gear and low or first gear, certainly,
It may include multiple gears, the present invention is without limitation.When the oil temperature in fuel tank is lower than preset temperature, the control of controller 24 the
One variable-frequency motor works in low or first gear；When the oil temperature in fuel tank is higher than preset temperature, controller 24 controls the first variable-frequency electric
Machine works in top gear, to make the torque of the first variable-frequency motor and the viscosity of oil match, to extend electrical machinery life.
Heater 2 is also provided in fuel tank, the heater is for heating the oil liquid in the fuel tank 1；
The controller 24 is also used to control the heater 2 when the oil liquid temperature is lower than preset threshold value and work, and described
When oil liquid temperature is higher than preset threshold value, controls the heater 2 and stop working.Having heaters is arranged in the present invention, can be in oil
When oil temperature in case is too low, oil is heated to suitable temperature, facilitates oil liquid flowing, oil liquid viscosity is reduced, to effectively subtract
The pressure of first variable-frequency motor of light oil-feed pump.Especially since the oil liquid that the present invention extracts is lubricating fluid, viscosity under low temperature
It is very high, and extract the oil-feed pump of oil liquid since its proper property is unable to reach very high torque, setting heater is preparatory
Heating to low temperature oil liquid can guarantee that oil-feed pump works normally.
It further include cooler 13 to improve the cooling performance of system, the cooler 13 is arranged in the oil inlet pipe
In, for cooling down the oil liquid in the oil inlet pipe.Another effect of cooler 13 is, in low temperature environment, fuel tank
In oil temperature it is too low, in order to protect the first variable-frequency motor, need to heat oil, and pass through heating oil may have compared with
High temperature, influences cooling effect, and cooler is arranged in oil inlet pipe and is able to solve the problem, guarantees defeated to vehicle gear box
The oil entered maintains lower temperature.
Certainly, it is contemplated that when oil temperature in oil inlet pipe itself is not high, do not need to carry out cooling situation by cooler,
System of the invention further includes thermostat valve 12 and the first branch, and the first branch and the oil inlet pipe are in parallel；The temperature control
Valve 12 is used to open valve when the temperature of measurement is higher than preset threshold value, makes the oil inlet pipe where oil liquid from the cooler 13
Road outflow, and valve is closed when the temperature of measurement is not higher than preset threshold value, so that oil liquid is not passed through the cooler 13, from
The first branch outflow.
It further include second temperature sensor 21, the second temperature sensor 21 is used to measure the oil in the oil return line
Liquid temperature；The controller 24 is also used to adjust second variable-frequency motor 17 according to the oil liquid temperature in the oil return line
Revolving speed.
Oil pressure in order to prevent in filling conduit is excessively high, and pressure biography is also provided in the oil inlet pipe of the invention
Sensor 15, the pressure sensor 15 are used to measure the oil liquid pressure in the oil inlet pipe；
System further includes overflow valve 9 and second branch, and the overflow valve 9 is arranged in the second branch, the overflow
Valve 9 is used to open when the oil liquid pressure that the pressure sensor 15 measures is higher than preset threshold value, makes oil liquid from described second
Branch flows back to fuel tank 1.From in Fig. 1 it can be seen that overflow valve 9 is separately positioned in two pipelines in parallel with the first check valve 8,
The oil liquid extracted in oil-feed pump 6 passes through the upward one-way flow of the first check valve 8, when oil pressure is excessively high, is higher than preset threshold value, overflows
It flows valve 9 to open, a part of oil liquid is flow back into fuel tank 1 from second branch.The present invention is provided with pressure sensing in oil inlet pipe
Device and overflow valve discharge a part of oil liquid by overflow valve, thus by oil inlet pipe when the oil pressure in oil inlet pipe is excessively high
Oil pressure cntrol in reasonable range, improve the safety and stability of system.
Filter 11 can also be set in the oil inlet pipe, and the filter 11 is used for the oil in the oil inlet pipe
Liquid is filtered.Filter is arranged in the present invention in oil inlet pipe, can effectively be filtered to the oil liquid in oil inlet pipe,
To filter out the impurity in oil inlet pipe, the purity of oil liquid is improved, the impurity being effectively prevented from oil liquid makes vehicle gear box
At damage.
Preferably, system can also include differential pressure transmitter device 10, and the differential pressure transmitter device 10 is for measuring
Alarm signal is sent to controller 24 when the pressure difference of 11 two sides of filter is greater than the set value, the controller 24 is used for
Standby signal is issued after receiving the alarm signal that the differential pressure transmitter device 10 is sent.Such as whether filter work is normal, is
It is no to need replacing filter core, to provide useful information for user, guarantees that filter works normally, improve the stability of system.
System can also include liquid-level switch 4, and the liquid-level switch 4 is arranged in the fuel tank 1, for sensing the oil
The height of oil liquid in case 1.Liquid-level switch can be floating ball type switch, be also possible to electronic type liquid-level switch, and the present invention does not limit
It is fixed, as long as liquid level relative altitude can be obtained, it is suitable for the present invention.Liquid-level switch, Neng Gouti is arranged in the present invention in fuel tank
For liquid level information, when liquid level is too low, controller control system stops working, thus avoid because liquid level it is too low to oil-feed pump caused by
Damage；When the oil liquid in fuel tank is excessively high, system can remind operator to be adjusted oil liquid with alert,
To be effectively protected oil-feed pump, the safety of system is improved.
Be additionally provided with air filter 5 on the fuel tank 1, the air filter 5 be used for enter the air of fuel tank into
Row filtering.
Air filter 5 can also be arranged in the present invention on fuel tank 1, be filtered to the air for entering fuel tank, avoid sky
Dust, impurity in gas enter fuel tank, ensure that the purity of oil liquid, and the impurity being effectively prevented from oil liquid makes vehicle gear box
At damage.
Since offline particle collector is all generally arranged in the prior art, the content of well cuts can not be obtained back in real time.
System of the invention is additionally provided with online particle collector 22 in the oil return line, for measuring oil liquid in oil return line
Cleannes remind operator to replace the oil liquid in fuel tank in time when impurity content is higher, avoid the oil contained a large amount of impurities
Liquid enters in vehicle gear box, damages to vehicle gear box.
Filter screen 23 is additionally provided in the fuel tank 1, the lower section of the oil return line is arranged in the filter screen 23.Due to
Iron-containing impurity is more in vehicle gear box, and filter screen is preferably magnetic filtration screen, can effectively be inhaled using magnetic filtration screen
Impurity in attached oil return.Certainly, the filter screen of other forms is also applied for the present invention, as long as the impurity that can be filtered in oil return is equal
Can, for example, fine and closely woven filter screen can be arranged in the position that oil return line imports fuel tank 1.
The present invention is also provided with oil inlet flowmeter 16 in the oil inlet pipe, and oil inlet flowmeter, which is preferably disposed on, to be leaned on
The position of nearly oil inlet；The oil inlet flowmeter 16 is used to measure the oil liquid flow in the oil inlet pipe；The oil return line
In be additionally provided with return flow meter 20, the return flow meter is used to measure the oil liquid flow in the oil return line；The control
Device 24 processed is also used to adjust first variable-frequency motor 7 according to the measurement result of the oil inlet flowmeter 16 and return flow meter 20
With the revolving speed of the second variable-frequency motor 17.
The present invention also sets up oil inlet flowmeter in oil inlet pipe, and return flow meter, Neng Goujian are arranged in oil return line
Survey oil inlet quantity and recirculating oil quantity.In addition, controller is according to the adjusting of the measurement result of the oil inlet flowmeter and return flow meter
The revolving speed of first variable-frequency motor and the second variable-frequency motor adjusts the first variable-frequency electric when the difference of oil inlet quantity and recirculating oil quantity is excessive
Machine low-speed running, so that oil inlet quantity and recirculating oil quantity be made to be maintained in reasonable range.
System of the invention further includes the first check valve 8 and second one-way valve 19；First check valve 8 is arranged described
Oil liquid one-way flow on oil inlet pipe, for extracting the oil-feed pump 6；The second one-way valve 8 is arranged in the oil return
Oil liquid one-way flow on pipeline, for extracting the scavenge oil pump 18.
The present invention provides setting third temperature sensor 14, and the third temperature sensor 14 is arranged in the oil inlet pipe
It, being capable of real-time detection inlet oil temperature close to one end of the vehicle gear box.
Embodiment two:
As shown in Fig. 2, the present invention provides the lubricating and cooling systems that another is used for vehicle gear box, comprising: fuel tank
1, oil-feed pump 6, the first variable-frequency motor 7, the first temperature sensor 3, scavenge oil pump 18, the second variable-frequency motor 17 and controller 24.
First variable-frequency motor 7 is for driving the oil-feed pump 6 to extract oil liquid, the oil liquid of extraction from the fuel tank 1
The oil inlet of vehicle gear box is input to by oil inlet pipe；Wherein, oil liquid be for vehicle gear box be lubricated with it is cold
But lubricating fluid, viscosity is very big at low temperature for oil liquid.
First temperature sensor 3 is arranged in fuel tank, for measuring the oil liquid temperature in the fuel tank 1.
The oil liquid that second variable-frequency motor 17 is used to that the scavenge oil pump 18 to be driven to extract in vehicle gear box, the oil of extraction
Liquid enters the fuel tank 1 by oil return line.Specifically, the oil outlet of vehicle gear box is arranged in scavenge oil pump 18.By
Use lubricating oil inlet oil temperature lower in cooling, when starting lubricating system at low temperature, the viscosity of oil is big when oil temperature is very low, to lead
It causes gravity oil return unsmooth, lubricating oil is caused constantly to be deposited in inside gear-box, make to be formed high pressure inside gear-box so as to cause oil
Liquid leakage, and long-time internal high pressure can bring damage to sealing element.Scavenge oil pump 18 is set, can extract and to be accumulated in gear-box
Lubricating oil, promotion flow back to the lubricating oil in gear-box successfully in fuel tank, efficiently avoid lubricating oil in gear-box
Accumulation.
Oil liquid temperature in fuel tank of the controller 24 for obtaining the acquisition of the first temperature sensor 3, and according to
The oil liquid temperature adjusts the revolving speed of first variable-frequency motor 7.
Specifically, the revolving speed of the first variable-frequency motor 7 is adjustable, for example, can have top gear and low or first gear, certainly,
It may include multiple gears, the present invention is without limitation.When the oil temperature in fuel tank is lower than preset temperature, the control of controller 24 the
One variable-frequency motor works in low or first gear；When the oil temperature in fuel tank is higher than preset temperature, controller 24 controls the first variable-frequency electric
Machine works in top gear, to make the torque of the first variable-frequency motor and the viscosity of oil match, to extend electrical machinery life.
Heater 2 is also provided in fuel tank, the heater is for heating the oil liquid in the fuel tank 1；
The controller 24 is also used to control the heater 2 when the oil liquid temperature is lower than preset threshold value and work, and described
When oil liquid temperature is higher than preset threshold value, controls the heater 2 and stop working.
It further include cooler 13 to improve the cooling performance of system, the cooler 13 is arranged in the oil inlet pipe
In, for cooling down the oil liquid in the oil inlet pipe.Another effect of cooler 13 is, in low temperature environment, fuel tank
In oil temperature it is too low, in order to protect the first variable-frequency motor, need to heat oil, and pass through heating oil may have compared with
High temperature, influences cooling effect, and cooler is arranged in oil inlet pipe and is able to solve the problem, guarantees defeated to vehicle gear box
The oil entered maintains lower temperature.
Certainly, it is contemplated that when oil temperature in oil inlet pipe itself is not high, do not need to carry out cooling situation by cooler,
The controller 24 is also used to control the cooling when the temperature that first temperature sensor 3 measures is lower than preset threshold value
Device 13 stops working.
The main distinction of the embodiment of the present invention two and embodiment one is the control to cooler 13, and the present embodiment is not required to
Thermostat valve is set, but controller directly controls the opening and closing of cooler 13.Certainly, in order to precisely control oil liquid
The 4th temperature sensor, the rest part and embodiment one of system can also be arranged in the oil liquid inlet of cooler 13 in temperature
Identical, details are not described herein.
The above is a preferred embodiment of the present invention, it is noted that for those skilled in the art
For, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also considered as
Protection scope of the present invention.
Claims (15)
1. a kind of lubricating and cooling system for vehicle gear box characterized by comprising fuel tank (1), oil-feed pump (6), first
Variable-frequency motor (7), the first temperature sensor (3), second temperature sensor (21), scavenge oil pump (18), the second variable-frequency motor (17),
Oil inlet flowmeter (16), return flow meter (20) and controller (24), wherein
First variable-frequency motor (7) is for driving the oil-feed pump (6) to extract oil liquid, the oil of extraction from the fuel tank (1)
Liquid is input to the oil inlet of vehicle gear box by oil inlet pipe；
First temperature sensor (3) is used to measure the oil liquid temperature in the fuel tank (1)；
The controller (24) is used to obtain the oil liquid temperature of the first temperature sensor (3) acquisition, and according to the oil liquid
Temperature adjusts the revolving speed of first variable-frequency motor (7)；
The oil liquid that second variable-frequency motor (17) is used to that the scavenge oil pump (18) to be driven to extract in vehicle gear box, the oil of extraction
Liquid enters the fuel tank (1) by oil return line；
The second temperature sensor (21) is used to measure the oil liquid temperature in the oil return line；
The controller (24) is also used to adjust second variable-frequency motor (17) according to the oil liquid temperature in the oil return line
Revolving speed；
It is additionally provided in oil inlet pipe oil inlet flowmeter (16), the oil inlet flowmeter (16) is for measuring in the oil inlet pipe
Oil liquid flow；It is additionally provided in oil return line return flow meter (20), the return flow meter is for measuring the oil return pipe
Oil liquid flow in road；
The controller (24) is also used to be adjusted according to the measurement result of the oil inlet flowmeter (16) and return flow meter (20)
The revolving speed of first variable-frequency motor (7) and the second variable-frequency motor (17)；When in oil liquid flow in oil inlet pipe and oil return line
When the difference of oil liquid flow is excessive, the first variable-frequency motor (7) low-speed running is adjusted.
2. the lubricating and cooling system according to claim 1 for vehicle gear box, which is characterized in that further include heater
(2), the heater is for heating the oil liquid in the fuel tank (1)；The controller (24) is also used in the oil
When liquid temperature is lower than preset threshold value, the heater (2) work is controlled, and be higher than preset threshold value in the oil liquid temperature
When, it controls the heater (2) and stops working.
3. the lubricating and cooling system according to claim 1 for vehicle gear box, which is characterized in that further include cooler
(13), the cooler (13) is arranged in the oil inlet pipe, for cooling down the oil liquid in the oil inlet pipe.
4. the lubricating and cooling system according to claim 3 for vehicle gear box, which is characterized in that further include thermostat valve
(12) and the first branch, the first branch and the oil inlet pipe are in parallel；The thermostat valve (12) is used for the temperature in measurement
Valve is opened when higher than preset threshold value, makes the oil inlet pipe outflow where oil liquid from the cooler (13), and measuring
Temperature be not higher than preset threshold value when close valve, so that oil liquid is not passed through the cooler (13), from the first branch stream
Out.
5. the lubricating and cooling system according to claim 3 for vehicle gear box, which is characterized in that the controller
(24) it is also used to control the cooler (13) when the temperature that first temperature sensor (3) measures is lower than preset threshold value
It stops working.
6. the lubricating and cooling system according to claim 1 for vehicle gear box, which is characterized in that the oil inlet pipe
In be additionally provided with pressure sensor (15), the pressure sensor (15) is used to measure oil liquid pressure in the oil inlet pipe；
It further include overflow valve (9) and second branch, the overflow valve (9) is arranged in the second branch, and the overflow valve (9) is used for
It is opened when the oil liquid pressure of the pressure sensor (15) measurement is higher than preset threshold value, makes oil liquid from the second branch stream
Oil return box (1).
7. the lubricating and cooling system according to claim 1 for vehicle gear box, which is characterized in that the oil inlet pipe
In be additionally provided with filter (11), the filter (11) is for being filtered the oil liquid in the oil inlet pipe.
8. the lubricating and cooling system according to claim 7 for vehicle gear box, which is characterized in that further include pressure difference hair
It interrogates device (10), the differential pressure transmitter device (10) is used for when the pressure difference for measuring the filter (11) two sides is greater than the set value
Alarm signal is sent to controller (24), the controller (24) is used in the report for receiving the differential pressure transmitter device (10) transmission
Standby signal is issued after alert signal.
9. the lubricating and cooling system according to claim 1 for vehicle gear box, which is characterized in that further include that liquid level is opened
It closes (4), the liquid-level switch (4) is arranged in the fuel tank (1), for sensing the height of oil liquid in the fuel tank (1).
10. the lubricating and cooling system according to claim 1 for vehicle gear box, which is characterized in that the fuel tank (1)
On be additionally provided with air filter (5), the air filter (5) be used for enter fuel tank air be filtered.
11. the lubricating and cooling system according to claim 1 for vehicle gear box, which is characterized in that the oil return pipe
It is additionally provided in road online particle collector (22), the online particle collector (22) is for measuring oil liquid in oil return line
Cleannes.
12. the lubricating and cooling system according to claim 1 for vehicle gear box, which is characterized in that the fuel tank (1)
In be additionally provided with filter screen (23), the lower section of the oil return line is arranged in the filter screen (23).
13. the lubricating and cooling system according to claim 1 for vehicle gear box, which is characterized in that further include first
Check valve (8) and second one-way valve (19)；First check valve (8) is arranged on the oil inlet pipe, for make it is described into
The oil liquid one-way flow that oil pump (6) extracts；The second one-way valve (8) is arranged on the oil return line, for making described return
The oil liquid one-way flow that oil pump (18) extracts.
14. the lubricating and cooling system according to claim 1 for vehicle gear box, which is characterized in that further include third
The oil inlet pipe is arranged in close to the one of the vehicle gear box in temperature sensor (14), the third temperature sensor (14)
End, for measuring the temperature of oil liquid in oil inlet pipe.
15. the lubricating and cooling system according to claim 12 for vehicle gear box, which is characterized in that the filter screen
It (23) is magnetic filtration screen.
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| CN201610490698.9A CN105972194B (en) | 2016-06-28 | 2016-06-28 | A kind of lubricating and cooling system for vehicle gear box |
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