CN108757415A - Drive system, control method and the sand throwing extinguishing vehicle of scattering mechanism - Google Patents
Drive system, control method and the sand throwing extinguishing vehicle of scattering mechanism Download PDFInfo
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- CN108757415A CN108757415A CN201810506384.2A CN201810506384A CN108757415A CN 108757415 A CN108757415 A CN 108757415A CN 201810506384 A CN201810506384 A CN 201810506384A CN 108757415 A CN108757415 A CN 108757415A
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- Prior art keywords
- hydraulic pump
- control
- drive system
- maximum
- engine
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/06—Control using electricity
Abstract
The invention discloses a kind of drive system of scattering mechanism, control method and sand throwing extinguishing vehicles.The control method of the drive system of scattering mechanism includes the following steps：Obtain the practical maximum working pressure of the output fluid of the real work rotating speed of engine and hydraulic pump under current working；According to real work rotating speed and practical maximum working pressure be calculated hydraulic pump current working maximum allowable discharge capacity；It is acted according to maximum allowable displacement control displacement control unit to control the actual displacement of hydraulic pump.Effectively to avoid engine misses.The control method of the scattering mechanism of the present invention calculates and controls the actual displacement of hydraulic pump according to the practical maximum working pressure of the real work rotating speed of engine under current working and hydraulic pump, so that the power of hydraulic pump can match with the power of engine in real time, to effectively avoid because scattering mechanism during the work time load excessive due to cause the operating pressure of hydraulic pump excessively high and the flame-out problem of engine brought.
Description
Technical field
The present invention relates to fire-extinguishing apparatus technical field, more particularly to a kind of drive system of scattering mechanism, control method and
Sand throwing extinguishing vehicle.
Background technology
With the rapid development of sand throwing fire-fighting technique, the degree of automation of sand throwing extinguishing vehicle is more and more high.Sand throwing extinguishing vehicle
Including scattering mechanism, scattering mechanism is driven by hydraulic control system and hydraulic motor as power source by diesel engine.
It is rotated since scattering mechanism is directly driven by hydraulic motor, great work intensity, the time is long and load working condition is changeable, therefore its pole
Easily occur leading to the failures such as engine misses because of load excessive.
Invention content
The purpose of the present invention is to provide a kind of drive system of scattering mechanism, control method and sand throwing extinguishing vehicles, to have
Effect avoids engine misses.
First aspect present invention provides a kind of control method of the drive system of scattering mechanism, and drive system includes hydraulic pressure
Pump, the displacement control unit of discharge capacity for controlling hydraulic pump and the engine for driving hydraulic pump to rotate, including it is as follows
Step：
Obtain the practical highest work of the output fluid of the real work rotating speed of engine and hydraulic pump under current working
Pressure；
Hydraulic pump is calculated in the maximum allowable of current working according to real work rotating speed and practical maximum working pressure
Discharge capacity；
It is acted according to maximum allowable displacement control displacement control unit to control the actual displacement of hydraulic pump.
In some embodiments, hydraulic pump is calculated current according to real work rotating speed and practical maximum working pressure
The maximum allowable discharge capacity of operating mode includes：The max. output torque of engine is calculated according to real work rotating speed, according to maximum
The maximum allowable discharge capacity of hydraulic pump is calculated with practical maximum working pressure for output torque.
In some embodiments, maximum of the engine in real work rotating speed is calculated according to the external characteristic curve of engine
Output torque.
In some embodiments, displacement control unit is solenoid electric valve, according to maximum allowable displacement control displacement control
Unit action includes the control electric current according to maximum allowable displacement control solenoid electric valve.
In some embodiments, include according to the control electric current of maximum allowable displacement control solenoid electric valve：Obtain electromagnetism
The practical control electric current of control valve；The corresponding solenoid electric valve of the maximum allowable discharge capacity is obtained according to maximum allowable discharge capacity account
Maximum controlling current, and compare maximum controlling current and practical control electric current, the control according to comparison result to solenoid electric valve
Electric current is controlled.
In some embodiments, when actually control electric current is less than maximum controlling current, the control of solenoid electric valve is controlled
Electric current is practical control electric current；When actually control electric current is more than maximum controlling current, the control electric current of solenoid electric valve is controlled
For maximum controlling current.
Second aspect of the present invention provides a kind of drive system of scattering mechanism, and drive system includes hydraulic pump, for controlling
The displacement control unit of the discharge capacity of hydraulic pump, engine and control device for driving hydraulic pump to rotate, control device are used
In obtaining under current working the real work rotating speed of engine and the practical maximum working pressure of hydraulic pump and according to practical work
Make rotating speed and the maximum allowable discharge capacity of hydraulic pump is calculated with according to maximum allowable displacement control liquid in practical maximum working pressure
The actual displacement of press pump.
In some embodiments, drive system further includes speed probe, and speed probe is used to acquire the reality of engine
Real work rotating speed is simultaneously sent to control device by border working speed；And/or drive system further includes pressure sensor, pressure
Sensor is used to acquire the actual working pressure of hydraulic pump and actual working pressure is sent to control device.
In some embodiments, control device includes：
Engine torque computing module, the max. output torque for engine to be calculated according to real work rotating speed；
And
Discharge capacity account module, for hydraulic pump to be calculated according to max. output torque and practical maximum working pressure
Maximum allowable discharge capacity.
Third aspect present invention provides a kind of sand throwing extinguishing vehicle, including scattering mechanism and any one of such as second aspect of the present invention
The drive system of the scattering mechanism of offer, drive system is for controlling scattering mechanism work.
Drive system, control method based on scattering mechanism provided by the invention and sand throwing extinguishing vehicle, wherein scattering mechanism
The control method of drive system include the following steps：Obtain the real work rotating speed and hydraulic pump of engine under current working
Output fluid practical maximum working pressure；Hydraulic pump is calculated according to real work rotating speed and practical maximum working pressure
In the maximum allowable discharge capacity of current working；It is acted according to maximum allowable displacement control displacement control unit to control the reality of hydraulic pump
Border discharge capacity.Effectively to avoid engine misses.The control method of the scattering mechanism of the present invention is according to engine under current working
The practical maximum working pressure of real work rotating speed and hydraulic pump calculates and controls the actual displacement of hydraulic pump, so that
The power of hydraulic pump can match with the power of engine in real time, to effectively avoid bearing during the work time because of scattering mechanism
Carry flame-out problem that is excessive and causing the engine that the operating pressure of hydraulic pump is excessively high and brings.
By referring to the drawings to the detailed description of exemplary embodiment of the present invention, other feature of the invention and its
Advantage will become apparent.
Description of the drawings
Attached drawing described herein is used to provide further understanding of the present invention, and is constituted part of this application, this hair
Bright illustrative embodiments and their description are not constituted improper limitations of the present invention for explaining the present invention.In the accompanying drawings：
Fig. 1 is the structural schematic diagram of the hydraulic control unit of the drive system of the scattering mechanism of the embodiment of the present invention；
Fig. 2 is the structural schematic diagram of the control device of the drive system of the scattering mechanism of the embodiment of the present invention；
Fig. 3 is the principle schematic of the control method of the drive system of the scattering mechanism of the embodiment of the present invention.
Specific implementation mode
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 describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Below
Description only actually at least one exemplary embodiment is illustrative, is never used as to the present invention and its application or makes
Any restrictions.Based on the embodiments of the present invention, those of ordinary skill in the art are not making creative work premise
Lower obtained every other embodiment, shall fall within the protection scope of the present invention.
Unless specifically stated otherwise, positioned opposite, the digital table of the component and step that otherwise illustrate in these embodiments
It is not limited the scope of the invention up to formula and numerical value.Simultaneously, it should be appreciated that for ease of description, attached each portion shown in the drawings
The size divided not is to be drawn according to actual proportionate relationship.For technology, side known to person of ordinary skill in the relevant
Method and equipment may be not discussed in detail, but in the appropriate case, and the technology, method and apparatus should be considered as authorizing explanation
A part for book.In shown here and discussion all examples, any occurrence should be construed as merely illustrative, and
Not by way of limitation.Therefore, the other examples of exemplary embodiment can have different values.It should be noted that：Similar label
Similar terms are indicated in following attached drawing with letter, therefore, once it is defined in a certain Xiang Yi attached drawing, then subsequent attached
It need not be further discussed in figure.
For ease of description, herein can with use space relative terms, as " ... on ", " in ... top ",
" ... upper surface ", " above " etc., for describing such as a device shown in the figure or feature and other devices or spy
The spatial relation of sign.It should be understood that spatially relative term is intended to comprising the orientation in addition to device described in figure
Except different direction in use or operation.For example, if the device in attached drawing is squeezed, it is described as " in other devices
It will be positioned as " under other devices or construction after part or construction top " or the device of " on other devices or construction "
Side " or " under other devices or construction ".Thus, exemplary term " ... top " may include " ... top " and
" in ... lower section " two kinds of orientation.The device can also other different modes positioning (be rotated by 90 ° or be in other orientation), and
And respective explanations are made to the opposite description in space used herein above.
As depicted in figs. 1 and 2, the drive system of the scattering mechanism of the embodiment of the present invention includes hydraulic control unit and control
Device 18.Wherein, hydraulic control unit include hydraulic pump 2, discharge capacity for controlling hydraulic pump 2 displacement control unit and use
In the engine 1 that driving hydraulic pump 2 rotates.Control device 18 is used to obtain the real work rotating speed of engine 1 under current working
And hydraulic pump 2 practical maximum working pressure and hydraulic pressure is calculated according to real work rotating speed and practical maximum working pressure
The maximum allowable discharge capacity of pump 2 is with according to the actual displacement of maximum allowable displacement control hydraulic pump 2.
The control device 18 of the drive system is according to the real work rotating speed and hydraulic pump 2 of engine under current working 1
Practical maximum working pressure calculate and control the actual displacement of hydraulic pump 2 so that the power of hydraulic pump 2 can be real-time
Match with the power of engine 1, to effectively avoid because scattering mechanism during the work time load excessive due to cause hydraulic pump
Operating pressure is excessively high and the flame-out problem of engine brought.And the drive system is obtained using control device and is started automatically
The real work rotating speed of machine and the practical maximum working pressure of hydraulic pump 2 and automatically to the discharge capacity of hydraulic pump 2 controlled from
And realize automation control, reduce human operational error.
In order to accurately obtain the real work rotating speed of engine, as shown in Figure 1, the drive system of the present embodiment further includes turning
Fast sensor 10.Speed probe 10 is used to acquire the real work rotating speed of engine and real work rotating speed is sent to control
Device.
Similarly, in order to accurately obtain the practical maximum working pressure of hydraulic pump 2, the drive system of the present embodiment further includes
Pressure sensor 11.Pressure sensor 11 is used to acquire the actual working pressure of hydraulic pump 2 and is sent to actual working pressure
Control device.
In order to accurately calculate the maximum allowable discharge capacity of hydraulic pump, as shown in Fig. 2, the control device 18 of the present embodiment includes
Engine torque computing module 182 and hydraulic pump discharge computing module 181.Wherein, engine torque computing module 182 is used for root
Factually the max. output torque T of engine 1 is calculated in border working speedmax.Hydraulic pump discharge computing module 181 is used for basis
Max. output torque TmaxAnd the maximum allowable discharge capacity V of hydraulic pump 2 is calculated in practical maximum working pressurec。
Engine torque computing module 182 can be the external characteristic curve of engine 1 or be obtained based on external characteristic curve
Tables of data or formula.Hydraulic pump discharge computing module 181 is the formula for displacement calculation of hydraulic pump.
As shown in Fig. 2, in the maximum allowable discharge capacity V that hydraulic pump 2 is calculatedcAfter also need to according to the maximum allowable discharge capacity
VcThe actual displacement of hydraulic pump 2 is accurately controlled.Preferably, the method that the control device of the present embodiment uses feedback control
The discharge capacity of hydraulic pump 2 is controlled.
In order to realize that the discharge capacity to hydraulic pump 2 carries out feedback control, the control device of the present embodiment further includes comparison module
183.And as shown in Figure 1, the displacement control unit of hydraulic pump 2 includes solenoid electric valve 15.The Electromagnetic Control of solenoid electric valve 15
The size of the control electric current of 15A is held to determine the discharge capacity of hydraulic pump 2.Therefore in the maximum allowable discharge capacity V that hydraulic pump 2 is calculatedc
(maximum allowable discharge capacity herein refers to the maximum under the maximum working pressure (MWP) that hydraulic pump is measured in current rotating speed and currently afterwards
Allow discharge capacity, be not the maximum pump discharge of hydraulic pump 2), control device is calculated and maximum allowable discharge capacity VcCorresponding maximum
Control electric current ic.Practical control electric current i of the comparison module 183 to maximum controlling current and solenoid electric valve 15dIt is compared simultaneously root
The control electric current of solenoid electric valve 15 is controlled according to comparison result, specifically, passes through the Electromagnetic Control of solenoid electric valve 15
End amplifier 17 carrys out the size of current at controller Electromagnetic Control end.
The discharge capacity adjustment process of hydraulic pump 1 is described in detail below according to Fig. 1.Two oil inlets of shuttle valve 7 are distinguished
The outlet end of hydraulic pump 2 and gear pump 9 is connected, the oil outlet of shuttle valve 7 is used to provide the control for meeting certain pressure oil.Pressure is cut
It works in right position under 15 normality of disconnected valve 16 and solenoid electric valve.The oil outlet of shuttle valve 7 control oil a part through upper restriction 8 into
Entering upper variable oil cylinder 4, a part enters lower variable oil cylinder 3 through solenoid electric valve 15, pressure shut-off valve 16 and lower restriction 5, by
It is more than the active area of upper variable oil cylinder 4 in the active area of lower variable oil cylinder 3, so the hydraulic pump 2 after pump 1 normally starts
Discharge capacity is always in the positions minimum injection rate Vgmin.When solenoid electric valve 15 it is electric after hydraulic pump 2 discharge capacity from minimum injection rate
Vgmin changes to maximum pump discharge Vgmax, and the discharge capacity of the bigger hydraulic pump of the electric current of solenoid electric valve 15 2 is bigger.Hydraulic pump 2 is fuel-displaced
Mouth, which connects, sheds motor 14, sheds 14 both ends parallel connection repairing check valve 13 of motor, sheds 14 oil outlet connected tank 12 of motor.
Specifically, as reality control electric current idLess than maximum controlling current icWhen, illustrate that the power of hydraulic pump at this time is less than this
When engine power, therefore continue according to the practical control electric current idIt is controlled.As reality control electric current idIt is controlled more than maximum
Electric current i processedcWhen, illustrate that the power of hydraulic pump at this time needs to reduce more than the power of engine at this time to avoid engine misses
Control electric current, you can according to maximum controlling current icIt is controlled.
As shown in figure 3, the control method of the drive system of the scattering mechanism of the present embodiment, includes the following steps：
Step 101：Obtain the reality of the output fluid of the real work rotating speed of engine 1 and hydraulic pump 2 under current working
Border maximum working pressure；
Step 102：Hydraulic pump is calculated in current working according to real work rotating speed and practical maximum working pressure
Maximum allowable discharge capacity；
Step 103：It is acted according to maximum allowable displacement control displacement control unit to control the actual displacement of hydraulic pump.
The control method is according to the real work rotating speed of engine under current working 1 and the reality most senior engineer of hydraulic pump 2
The actual displacement of hydraulic pump 2 is calculated and controlled as pressure so that the power of hydraulic pump 2 can in real time with engine 1
Power matches, to effectively avoid because scattering mechanism during the work time load excessive due to cause the operating pressure mistake of hydraulic pump
The high and flame-out problem of engine brought.
In some embodiments, hydraulic pump is calculated current according to real work rotating speed and practical maximum working pressure
The maximum allowable discharge capacity of operating mode includes：The max. output torque of engine is calculated according to real work rotating speed, according to maximum
The maximum allowable discharge capacity of hydraulic pump is calculated with practical maximum working pressure for output torque.
In at least one embodiment, engine is calculated in real work rotating speed according to the external characteristic curve of engine
Max. output torque.
In some embodiments, include according to the control electric current of maximum allowable displacement control solenoid electric valve：Obtain electromagnetism
The practical control electric current of control valve；The corresponding solenoid electric valve of the maximum allowable discharge capacity is obtained according to maximum allowable discharge capacity account
Maximum controlling current, and compare maximum controlling current and practical control electric current, the control according to comparison result to solenoid electric valve
Electric current is controlled.
The present embodiment also provides a kind of sand throwing extinguishing vehicle, including scattering mechanism and the scattering mechanism as described in above example
Drive system, drive system for control scattering mechanism work.Due to sand throwing extinguishing vehicle scattering mechanism during the work time
It needs to shed the sandy soil in sandy soil heap to the place that catches fire, and can be to scattering mechanism when there is the hard substance such as stone in sandy soil heap
Great load pressure is caused, to which transmitter can be caused flame-out.Therefore the drive system of the scattering mechanism of the present embodiment is special
Door is designed for the operating condition of sand throwing extinguishing vehicle.
Fig. 1 shows the structural schematic diagram of the hydraulic control unit of the drive system of the present embodiment.The hydraulic control unit packet
Include engine 1, hydraulic pump 2 and gear pump 9.Engine 1 drives hydraulic pump 2 and gear pump 9 to rotate, and 2 He of hydraulic pump
Gear pump 9 is by hydraulic oil filter 6 from 12 oil suction of fuel tank.4 co- controlling hydraulic pump 2 of lower variable oil cylinder 3 and upper variable oil cylinder
Displacement size.
Two oil inlets of shuttle valve 7 are separately connected the outlet end of hydraulic pump 2 and gear pump 9, and the oil outlet of shuttle valve 7 is for carrying
For meeting the control oil of certain pressure.It works in right position under 15 normality of pressure shut-off valve 16 and solenoid electric valve.Shuttle valve 7 it is fuel-displaced
A control oil part for mouth enters upper variable oil cylinder 4 through upper restriction 8, and a part is through solenoid electric valve 15, pressure shut-off valve 16
Enter lower variable oil cylinder 3 with lower restriction 5, since the active area of lower variable oil cylinder 3 is more than the acting surface of upper variable oil cylinder 4
Product, so the discharge capacity of hydraulic pump 2 is always in the positions minimum injection rate Vgmin after pump 1 normally starts.When solenoid electric valve 15 must be electric
The discharge capacity of hydraulic pump 2 changes from minimum injection rate Vgmin to maximum pump discharge Vgmax later, the bigger liquid of electric current of solenoid electric valve 15
The discharge capacity of press pump 2 is bigger.2 oil outlet of hydraulic pump, which connects, sheds motor 14, sheds 14 both ends parallel connection repairing check valve 13 of motor, sheds
14 oil outlet connected tank 12 of motor.
Finally it should be noted that：The above embodiments are merely illustrative of the technical scheme of the present invention and are not intended to be limiting thereof；To the greatest extent
The present invention is described in detail with reference to preferred embodiments for pipe, those of ordinary skills in the art should understand that：Still
It can modify to the specific implementation mode of the present invention or equivalent replacement is carried out to some technical characteristics；Without departing from this hair
The spirit of bright technical solution should all cover within the scope of the technical scheme claimed by the invention.
Claims (10)
1. a kind of control method of the drive system of scattering mechanism, the drive system include hydraulic pump, for controlling the liquid
The displacement control unit of the discharge capacity of press pump and engine for driving hydraulic pump rotation, which is characterized in that including such as
Lower step：
Obtain the practical highest of the output fluid of the real work rotating speed of the engine and the hydraulic pump under current working
Operating pressure；
The hydraulic pump is calculated in the current work according to the real work rotating speed and the practical maximum working pressure
The maximum allowable discharge capacity of condition；
According to displacement control unit action described in the maximum allowable displacement control to control the actual displacement of the hydraulic pump.
2. the control method of the drive system of scattering mechanism according to claim 1, which is characterized in that according to the reality
Hydraulic pump is calculated in working speed and the practical maximum working pressure：
The max. output torque of the engine is calculated according to the real work rotating speed, according to the max. output torque and institute
State the maximum allowable discharge capacity that the hydraulic pump is calculated in practical maximum working pressure.
3. the control method of the drive system of scattering mechanism according to claim 2, which is characterized in that started according to described
The external characteristic curve of machine calculates max. output torque of the engine in the real work rotating speed.
4. the control method of the drive system of scattering mechanism according to claim 1, which is characterized in that the displacement control
Unit is solenoid electric valve, includes according to the maximum according to displacement control unit action described in the maximum allowable displacement control
Allow the control electric current of solenoid electric valve described in displacement control.
5. the control method of the drive system of scattering mechanism according to claim 4, which is characterized in that according to the maximum
The control electric current of solenoid electric valve described in displacement control is allowed to include：Obtain the practical control electric current of the solenoid electric valve；Root
The maximum controlling current of the corresponding solenoid electric valve of the maximum allowable discharge capacity is obtained according to the maximum allowable discharge capacity account, and
Compare the maximum controlling current and the practical control electric current, the control according to the comparison result to the solenoid electric valve
Electric current is controlled.
6. the control method of the drive system of scattering mechanism according to claim 5, which is characterized in that when the practical control
When electric current processed is less than the maximum controlling current, the control electric current for controlling the solenoid electric valve is the practical control electric current；
When the practical control electric current is more than the maximum controlling current, the control electric current for controlling the solenoid electric valve is maximum controls
Electric current processed.
7. a kind of drive system of scattering mechanism, which is characterized in that the drive system includes hydraulic pump, for controlling the liquid
The displacement control unit of the discharge capacity of press pump, engine and control device for driving the hydraulic pump rotation, the control
Device is used to obtain the real work rotating speed of the engine under current working and the practical highest work pressure of the hydraulic pump
Power and the maximum allowable row that the hydraulic pump is calculated according to the real work rotating speed and the practical maximum working pressure
Amount is with according to the actual displacement of hydraulic pump described in the maximum allowable displacement control.
8. the drive system of scattering mechanism according to claim 7, which is characterized in that the drive system further includes rotating speed
Sensor, the speed probe are used to acquire the real work rotating speed of the engine and send the real work rotating speed
To the control device；And/or the drive system further includes pressure sensor, the pressure sensor is described for acquiring
The actual working pressure is simultaneously sent to the control device by the actual working pressure of hydraulic pump.
9. the drive system of scattering mechanism according to claim 7, which is characterized in that the control device includes：
Engine torque computing module, the maximum output for the engine to be calculated according to the real work rotating speed are turned round
Square；And
Discharge capacity account module, it is described for being calculated according to the max. output torque and the practical maximum working pressure
The maximum allowable discharge capacity of hydraulic pump.
10. a kind of sand throwing extinguishing vehicle, which is characterized in that the throwing including scattering mechanism and as described in any one of claim 7 to 9
The drive system of device is spread, the drive system is for controlling the scattering mechanism work.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810506384.2A CN108757415B (en) | 2018-05-24 | 2018-05-24 | Driving system and control method of throwing device and sand throwing and fire extinguishing train |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810506384.2A CN108757415B (en) | 2018-05-24 | 2018-05-24 | Driving system and control method of throwing device and sand throwing and fire extinguishing train |
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| Publication Number | Publication Date |
|---|---|
| CN108757415A true CN108757415A (en) | 2018-11-06 |
| CN108757415B CN108757415B (en) | 2020-01-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810506384.2A Active CN108757415B (en) | 2018-05-24 | 2018-05-24 | Driving system and control method of throwing device and sand throwing and fire extinguishing train |
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| CN (1) | CN108757415B (en) |
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| US11702920B1 (en) | 2022-06-24 | 2023-07-18 | Yantai Jereh Petroleum Equipment & Technologies Co., Ltd. | Fracturing control method and fracturing system |
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|---|---|
| CN108757415B (en) | 2020-01-10 |
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