CN110422230A - Hydraulic steering system, mixer truck and its control method - Google Patents
Hydraulic steering system, mixer truck and its control method Download PDFInfo
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- CN110422230A CN110422230A CN201910857055.7A CN201910857055A CN110422230A CN 110422230 A CN110422230 A CN 110422230A CN 201910857055 A CN201910857055 A CN 201910857055A CN 110422230 A CN110422230 A CN 110422230A
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- 238000000034 method Methods 0.000 title claims abstract description 21
- 239000002828 fuel tank Substances 0.000 claims abstract description 52
- 239000007788 liquid Substances 0.000 claims description 7
- 238000004891 communication Methods 0.000 claims description 2
- 230000000630 rising effect Effects 0.000 abstract description 10
- 230000017525 heat dissipation Effects 0.000 abstract description 6
- 239000003921 oil Substances 0.000 description 187
- 239000010720 hydraulic oil Substances 0.000 description 29
- 239000000446 fuel Substances 0.000 description 16
- 238000007789 sealing Methods 0.000 description 13
- 239000012530 fluid Substances 0.000 description 8
- 230000008859 change Effects 0.000 description 6
- 238000001816 cooling Methods 0.000 description 5
- 230000007423 decrease Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 230000032683 aging Effects 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 3
- 238000006731 degradation reaction Methods 0.000 description 3
- 230000003111 delayed effect Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000010729 system oil Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D5/00—Power-assisted or power-driven steering
- B62D5/06—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D5/00—Power-assisted or power-driven steering
- B62D5/06—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle
- B62D5/062—Details, component parts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D5/00—Power-assisted or power-driven steering
- B62D5/06—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle
- B62D5/20—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle specially adapted for particular type of steering gear or particular application
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D5/00—Power-assisted or power-driven steering
- B62D5/06—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle
- B62D5/30—Safety devices, e.g. alternate emergency power supply or transmission means to ensure steering upon failure of the primary steering means
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention proposes a kind of hydraulic steering system, mixer truck and its control methods, wherein hydraulic steering system includes: power steering stgear；Steering pump；First circuit is equipped with the first fuel tank；Second servo loop, second servo loop are equipped with the second fuel tank；Switching device, switching device are connected to any one circuit in the first circuit and second servo loop with steering pump and power steering stgear.According to the technical solution of the present invention, the oil temperature rising for efficiently avoiding hydraulic steering system is too fast, improve the safety of hydraulic steering system, simultaneously, the upper charge of oil case of mixer truck is incorporated to second servo loop as the second fuel tank, has better heat dissipation performance, and do not need additionally to increase fuel tank, structure is simplified, space is saved.
Description
Technical field
The present invention relates to mixer truck technical field, in particular to a kind of hydraulic steering system, a kind of mixer truck and its
Control method.
Background technique
The conventional hydraulic power steering system of the special purpose vehicles such as mixer truck, turning to oil temperature height is its common problem,
As shown in Figure 1, general countermeasure is to install chassis radiator 12 additional, but effect is unobvious, and it is especially severe in operating condition, it runs at a low speed
In the case of, the hydraulic fluid temperature in the steering oil vessel 14 of steering system is easy to steeply rise, and causes hydraulic oil thinning, and performance becomes
Difference, and output pressure decline can occur under high temperature hydraulic oil working condition for steering pump 16, flow is reduced, even not fuel feeding
Phenomenon causes hard steering even to fail, in addition, hydraulic fluid temperature can also make each rubber seal in steering system quickly old
Change, reduces sealing performance, shorten the service life of components, reduce the reliability and durability of system.
Summary of the invention
The present invention is directed at least improve one of technical problems existing in the prior art or related technologies.
In view of this, it is an object of the present invention to provide a kind of hydraulic steering systems.
It is another object of the present invention to provide a kind of mixer trucks.
Yet another object of the invention is that providing a kind of control method of mixer truck.
To achieve the goals above, the technical solution of first aspect present invention provides a kind of hydraulic steering system, comprising:
Power steering stgear, for turning to；Steering pump is connected to power steering stgear, and steering pump, which is used to provide for power steering stgear, to be turned
To power-assisted；First circuit, the first circuit are equipped with the first fuel tank；Second servo loop, second servo loop are equipped with the second fuel tank；Switching dress
It sets, switching device turns any one circuit and steering pump and power in the first circuit and second servo loop
It is connected to device.
In the technical scheme, there are two circuits for setting in hydraulic steering system, and have an oil in each circuit
Case fuel feeding, two circuits can be by the switching of switching device, each independently using the fuel tank in its circuit, to electronic-controlled power steering
Device and steering pump recycle fuel feeding, in this way in the analysis of hydraulic oil overheat in a circuit, can be switched to another oil temperature compared with
Low circuit, and steering pump and power steering stgear can access fuel feeding always, avoid hydraulic oil because temperature sharply on
Situations such as hydraulic oil is thinning caused by rising, degradation, and then avoid the output pressure decline, flow from reducing, even not fuel feeding
Phenomenon has also delayed the aging speed of sealing element, ensure that the sealing performance of sealing element, extends the service life of components,
Improve safety, reliability and the durability of hydraulic steering system.
Specifically, by being arranged the first circuit, the first circuit is equipped with the first fuel tank, the first circuit by switching device with
Steering pump is connected to power steering stgear, and the first fuel tank is enable to provide hydraulic oil for steering pump and power steering stgear, makes to turn
Power steering is generated to oil pump, driving power steering stgear turns to；Similarly, second servo loop is equipped with the second fuel tank, second servo loop
It is connected to by switching device with steering pump and power steering stgear, enabling the second fuel tank is that steering pump and power steering stgear mention
For hydraulic oil, steering pump is made to generate power steering, driving power steering stgear turns to.
Further, by the setting of switching device, when hydraulic fluid temperature in the first loop is higher, control can be passed through
Switching device commutation processed, disconnects the first circuit, and is connected to second servo loop and carries out fuel feeding, and the hydraulic oil in the first circuit can then have
Regular hour is cooled down；It is same by control switching device commutation when hydraulic fluid temperature in the second loop is higher, break
Second servo loop is opened, the first circuit is connected to, cools down the hydraulic oil of second servo loop.
In any of the above-described technical solution, hydraulic steering system further include: the first temperature sensor is set to the first circuit
It is interior, to detect the first oil temperature in the first circuit；Controller is all connected with the first temperature sensor, switching device, and controller is used
According to the first oil temperature, controls switching device and switch the first circuit and second servo loop.
In any of the above-described technical solution, hydraulic steering system further include: second temperature sensor is set to second servo loop
Interior, to detect the second oil temperature in second servo loop, second temperature sensor is connected with controller；Controller is also used to according to first
Oil temperature and the second oil temperature, control switching device switch the first circuit and second servo loop.
In any of the above-described technical solution, hydraulic steering system further include: the first radiator is set in the first circuit,
First radiator radiates for the first circuit；And/or second radiator, it is set in second servo loop, the second radiator is used for second
Circuit heat dissipation.
In any of the above-described technical solution, switching device includes that the first electromagnetic hydraulic pressure reversal valve and the second electromagnetic hydraulic pressure change
To valve, the first interface of the first electromagnetic hydraulic pressure reversal valve is connect with power steering stgear, and the second of the first electromagnetic hydraulic pressure reversal valve connects
Mouth is connect with the first circuit, and the third interface of the first electromagnetic hydraulic pressure reversal valve is connect with second servo loop；The commutation of second electromagnetic hydraulic pressure
The first interface of valve is connect with steering pump, and the second interface of the second electromagnetic hydraulic pressure reversal valve is connect with the first circuit, the second electricity
The third interface of magnetic hydraulicdirectional control valve is connect with second servo loop.
The technical solution of second aspect of the present invention provides a kind of any one of mixer truck, including above-mentioned first aspect technology
The hydraulic steering system of scheme, the first fuel tank of hydraulic steering system are the chassis steering oil vessel of mixer truck, hydraulic steering system
The second fuel tank be mixer truck upper charge of oil case.
In the technical scheme, by using the hydraulic steering system of any of the above-described technical solution, to be provided with
Whole beneficial effects of technical solution are stated, details are not described herein.
It may also be noted that the first fuel tank is the chassis steering oil vessel of mixer truck, the second fuel tank of hydraulic steering system
For the upper charge of oil case of mixer truck, existing component on mixer truck is utilized in this way, does not need additionally to increase fuel tank, simplification finishes
Structure saves space, and upper charge of oil tankage is bigger, and the oil liquid in fuel tank is more, cooling to the oil liquid of hydraulic steering system to dissipate
Heat effect is more preferable, is conducive to avoid hydraulic fluid temperature rising too fast.
In the above-mentioned technical solutions, the second radiator of hydraulic steering system is the upper dress radiator of mixer truck.
The technical solution of third aspect present invention provides a kind of for any one of above-mentioned second aspect technical solution
The control method of mixer truck, in the first circuit of mixer truck and second servo loop, one is connected state using as current loop, separately
One is off-state so that as standby circuit, control method includes: step S100: obtaining current loop oil temperature and standby circuit
Oil temperature；Step S102: judge whether current loop oil temperature is less than default secure threshold；Step S104: if current loop oil temperature is small
In default secure threshold, controls switching device and keep current state；Step S106: it is preset if current loop oil temperature is greater than or equal to
Secure threshold commutates according to standby circuit Oil-temperature control switching device.
In the technical scheme, oily by the current loop oil temperature and standby circuit that obtain the hydraulic steering system of mixer truck
Temperature, and judge whether current loop oil temperature is less than default secure threshold, it is greater than or equal to default safety threshold in current loop oil temperature
When value, commutated according to standby circuit Oil-temperature control switching device, the hydraulic oil of such hydraulic steering system can be in two circuits
In recycle in turn, so as to avoid always by the fuel tank fuel feeding in a circuit cause hydraulic fluid temperature steeply rise cause it is hydraulic
Situations such as oil thinning, degradation, so avoid output pressure decline, flow from reducing, even not fuel feeding the phenomenon that, also delay
The aging speed of sealing element ensure that the sealing performance of sealing element, extends the service life of components, improves fluid-link steering
Safety, reliability and the durability of system.
It is appreciated that either the first circuit or second servo loop are required to avoid high oil temperature as current loop, and
When being switched to standby circuit, need to consider standby circuit oil temperature, if standby circuit oil temperature it is identical with current loop oil temperature or
Person is higher, just loses meaning then switching, therefore when controlling switching device switching, needs it is also contemplated that standby circuit oil
Temperature.
In the above-mentioned technical solutions, it is commutated according to standby circuit Oil-temperature control switching device, specifically includes: judging standby time
Whether road binders temperature is less than default secure threshold；If standby circuit oil temperature is less than default secure threshold, control switching device commutation；If
Standby circuit oil temperature is greater than or equal to default secure threshold, determines the temperature difference between current loop oil temperature and standby circuit oil temperature,
And judge whether the temperature difference is greater than temperature difference threshold；If the temperature difference is greater than temperature difference threshold, control switching device commutation；If the temperature difference is less than or waits
In temperature difference threshold, controls switching device and keep current state.
In the above-mentioned technical solutions, current loop oil temperature and standby circuit oil temperature are obtained, is specifically included: obtaining the first circuit
With the second oil temperature of the current state of second servo loop and first oil temperature in the first circuit and second servo loop；If the first circuit connects
Logical, second servo loop disconnects, and determines that the first circuit is current loop, second servo loop is standby circuit；If the first circuit disconnects, second
Circuit communication determines that the first circuit is standby circuit, and second servo loop is current loop；The first circuit be current loop, second
When circuit is standby circuit, judges whether current loop oil temperature is less than default secure threshold, specifically include: judging the first circuit
Whether the first oil temperature is less than the first default secure threshold；If current loop oil temperature is less than default secure threshold, switching device is controlled
Current state is kept, is specifically included: if the first oil temperature controls switching device and keep current shape less than the first default secure threshold
State；If current loop oil temperature is greater than or equal to default secure threshold, commutated according to standby circuit Oil-temperature control switching device, specifically
If including: that the first oil temperature is greater than or equal to the first default secure threshold, judge the second oil temperature whether less than the second default safety threshold
Value；If the second oil temperature controls switching device commutation less than the second default secure threshold；If it is pre- that the second oil temperature is greater than or equal to second
If secure threshold, first temperature difference between the first oil temperature and the second oil temperature is determined, and judge whether first temperature difference is greater than the first temperature
Poor threshold value；If first temperature difference is greater than the first temperature difference threshold, control switching device commutation；If first temperature difference is less than or equal to the first temperature
Poor threshold value keeps the current state of switching device；When the first circuit is standby circuit, and second servo loop is current loop, judgement
Whether whether current loop oil temperature is less than default secure threshold, specifically includes: judging the second oil temperature of second servo loop less than second
Default secure threshold；If current loop oil temperature is less than default secure threshold, control switching device keeps current state, specific to wrap
It includes: if the second oil temperature controls switching device and keep current state less than the second default secure threshold；If current loop oil temperature is greater than
Or be equal to default secure threshold, commutated, specifically included according to standby circuit Oil-temperature control switching device: if the second oil temperature be greater than or
Equal to the second default secure threshold, judge first oil temperature in the first circuit whether less than the first default secure threshold；If the first oil
Temperature controls switching device commutation less than the first default secure threshold；If the first oil temperature is greater than or equal to the first default secure threshold,
It determines second temperature difference between the second oil temperature and the first oil temperature, and judges whether second temperature difference is greater than the second temperature difference threshold；If the
Two temperature difference are greater than the second temperature difference threshold, control switching device commutation；If second temperature difference is less than or equal to the second temperature difference threshold, keep
The current state of switching device.
It is appreciated that being equipped with chassis steering oil vessel in the first loop, it is equipped with upper charge of oil case, upper charge of oil in the second loop
The capacity of case is generally higher than chassis steering oil vessel, for the steering oil vessel of chassis, has better heat dissipation effect.
Additional aspect and advantage of the invention will become obviously in following description section, or practice through the invention
Recognize.
Detailed description of the invention
Fig. 1 is the hydraulic principle schematic diagram of hydraulic steering system in the prior art；
The corresponding relationship between appended drawing reference and component names in Fig. 1 are as follows:
12 chassis radiators, 14 chassis steering oil vessels, 16 steering pumps.
Fig. 2 is the hydraulic principle schematic diagram of the hydraulic steering system of one embodiment of the present of invention；
Fig. 3 is the flow diagram of the control method of one embodiment of the present of invention；
Fig. 4 is the flow diagram of the control method of another embodiment of the invention；
Fig. 5 is the flow diagram of the control method of another embodiment of the invention.
Wherein, the appended drawing reference in Fig. 2 and the corresponding relationship between component names are as follows:
20 power steering stgears, 22 steering pumps, 24 first electromagnetic hydraulic pressure reversal valves, 26 second electromagnetic hydraulic pressure reversal valves, 28
Controller, 30 first fuel tanks, 32 first temperature sensors, 34 first radiators, 40 second fuel tanks, 42 second temperature sensors,
44 second radiators.
Specific embodiment
It is with reference to the accompanying drawing and specific real in order to be more clearly understood that the above objects, features and advantages of the present invention
Applying mode, the present invention is further described in detail.It should be noted that in the absence of conflict, the implementation of the application
Feature in example and embodiment can be combined with each other.
In the following description, numerous specific details are set forth in order to facilitate a full understanding of the present invention, still, the present invention may be used also
To be implemented using other than the one described here other modes, therefore, protection scope of the present invention is not by described below
Specific embodiment limitation.
According to some embodiments of the present invention referring to Fig. 2 to Fig. 5 description.
As shown in Fig. 2, the hydraulic steering system of the one embodiment proposed according to the present invention, comprising: power steering stgear 20,
For turning to；Steering pump 22 is connected to power steering stgear 20, and steering pump 22 is used to provide steering for power steering stgear 20 and help
Power；First circuit is equipped with the first fuel tank 30；Second servo loop, second servo loop are equipped with the second fuel tank 40；Switching device, switching dress
It sets and is connected to any one circuit in the first circuit and second servo loop with steering pump and power steering stgear.
In this embodiment, there are two circuits for setting in hydraulic steering system, and have a fuel tank in each circuit
Fuel feeding, two circuits, each independently using the fuel tank in its circuit, to power steering stgear 20 and can be turned by switching device
Recycling fuel feeding to oil pump 22, it is lower can be switched to another oil temperature in this way in the analysis of hydraulic oil overheat in a circuit
Circuit, and steering pump 22 and power steering stgear 20 can access fuel feeding always, avoid hydraulic oil because temperature sharply on
Situations such as hydraulic oil is thinning caused by rising, degradation, and then avoid the output pressure decline, flow from reducing, even not fuel feeding
Phenomenon has also delayed the aging speed of sealing element, ensure that the sealing performance of sealing element, extends the service life of components,
Improve safety, reliability and the durability of hydraulic steering system.
Specifically, by the way that the first circuit is arranged, the first circuit is equipped with the first fuel tank 30, and the first circuit passes through switching device
It is connected to steering pump 22 and power steering stgear 20, enabling the first fuel tank 30 is that steering pump 22 and power steering stgear 20 provide
Hydraulic oil, makes steering pump 22 generate power steering, and driving power steering stgear 20 turns to；Similarly, second servo loop is equipped with the
Two fuel tanks 40, second servo loop are connected to by switching device with steering pump 22 and power steering stgear 20, and the second fuel tank 40 is enable
Hydraulic oil is provided for steering pump 22 and power steering stgear 20, steering pump 22 is made to generate power steering, drives power steering stgear
20 turn to.
Further, by the setting of switching device, when hydraulic fluid temperature in the first loop is higher, control can be passed through
Switching device commutation processed, disconnects the first circuit, and is connected to second servo loop and carries out fuel feeding, and the hydraulic oil in the first circuit can then have
Regular hour is cooled down；It is same by control switching device commutation when hydraulic fluid temperature in the second loop is higher, break
Second servo loop is opened, the first circuit is connected to, cools down the hydraulic oil of second servo loop.
It, can be using other hydraulic oil containers in equipment as the it may also be noted that by the technical solution of the application
Two fuel tanks 40, such as the upper charge of oil case of mixer truck, can make full use of the original component and structure of equipment, it is only necessary to do one in this way
Point pipeline change does not have to additional increase fuel tank, can significantly simplify design in this way, save material and component, be also convenient for
It is reequiped in existing structure basis；It is appreciated that the first fuel tank 30 can be the chassis steering oil vessel on mixer truck.
It is appreciated that upper charge of oil tankage is bigger, the oil liquid in fuel tank is more, is more advantageous to hydraulic oil radiating and cooling, keeps away
It is too fast to exempt from temperature rise.
As shown in Fig. 2, optionally, in some embodiments, switching device includes the first electromagnetic hydraulic pressure reversal valve 24 and the
The first interface of two electromagnetic hydraulic pressure reversal valves 26, the first electromagnetic hydraulic pressure reversal valve 24 is connect with power steering stgear 20, the first electromagnetism
The second interface of hydraulicdirectional control valve is connect with the first fuel tank 30, the third interface of the first electromagnetic hydraulic pressure reversal valve and the second fuel tank 40
Connection；The first interface of second electromagnetic hydraulic pressure reversal valve 26 is connect with steering pump 22, and the of the second electromagnetic hydraulic pressure reversal valve 26
Two interfaces are connect with the first fuel tank 30, and the third interface of the second electromagnetic hydraulic pressure reversal valve is connect with the second fuel tank 40.
In the above-described embodiments, the pipeline connected between power steering stgear 20 and steering pump 22 is overlapped, and is turned with power
Working connection is formed to device 20, steering pump 22, the both ends of working connection are respectively equipped with first with 20 piping connection of power steering stgear
Electromagnetic hydraulic pressure reversal valve 24 and the second electromagnetic hydraulic pressure reversal valve 26 with 22 piping connection of steering pump.
In any of the above-described embodiment, hydraulic steering system further include: the first temperature sensor 32 is set to the first circuit
It is interior, to detect the first oil temperature in the first circuit；Controller 28, with the first temperature sensor 32, the first electromagnetic hydraulic pressure reversal valve
24, the second electromagnetic hydraulic pressure reversal valve 26 is all connected with, and controller 28 is used to control the first electromagnetic hydraulic pressure reversal valve according to the first oil temperature
24, the second electromagnetic hydraulic pressure reversal valve 26 switches the first circuit and second servo loop.
In this embodiment, by the setting of the first temperature sensor 32 and controller 28, be conducive to grasp the first circuit
The first interior oil temperature, and the switching for whether needing to carry out the first circuit and second servo loop is judged automatically according to the first oil temperature is the
High temperature hydraulic oil in primary Ioops provides cooling time, improves automation, the intelligence of the oil temperature regulation in hydraulic steering system
Change degree advantageously ensures that the oil temperature in hydraulic steering system is unlikely to excessively high and leads to steering system failure.
In any of the above-described embodiment, hydraulic steering system further include: second temperature sensor 42 is set to second servo loop
Interior, to detect the second oil temperature in second servo loop, second temperature sensor 42 is connected with controller 28；Controller 28 is also used to root
According to the first oil temperature and the second oil temperature, the first electromagnetic hydraulic pressure reversal valve 24 is controlled, the second electromagnetic hydraulic pressure reversal valve 26 switches first time
Road and second servo loop.
In this embodiment, by the setting of second temperature sensor 42, can to the second oil temperature in second servo loop into
Row detection, from the first circuit of second servo loop switchback, makes when rising to high value in this way convenient for the second oil temperature in the second loop
Hydraulic oil in second servo loop can be cooled down；Further, the first oil temperature and the second oil temperature can also be compared, is made
With the lower circuit of temperature come fuel feeding and circulation, and the hydraulic oil in the higher circuit of temperature can then be cooled down；Or
Person before the switch, detects the oil temperature in the circuit that will be switched to, it is ensured that the oil temperature in the circuit is lower, so always
It is recycled using the lower hydraulic oil of temperature, advantageously ensures that safety, stability and the reliability of hydraulic steering system.
In any of the above-described embodiment, hydraulic steering system further include: the first radiator 34 is set in the first circuit,
First radiator 34 radiates for the first circuit；And/or second radiator 44, it is set in second servo loop, the second radiator 44 is used
It radiates in second servo loop.
In this embodiment, by the way that the first radiator 34 is arranged in the first loop, be conducive to hydraulic in the first circuit
Oil heat dissipation avoids the first oil temperature from rising too fast；Second radiator 44 is set in the second loop, is conducive to the liquid in second servo loop
Pressure oil heat dissipation avoids the second oil temperature from rising too fast.
It is to be appreciated that the first radiator 34, the second radiator 44 can be using radiating fin or other forms
Radiator structure.
In some embodiments, second servo loop can use other hydraulic services of equipment itself, such as mixer truck is upper
Radiator is filled, is active radiator, this can be using upper dress radiator as the second radiator 44, to reduce component count
Amount, simplifies structure, and active radiator capacity is big, radiating rate is fast, and the oil temperature for being more advantageous to hydraulic steering system is quick
It reduces.
The embodiment of second aspect of the present invention provides a kind of any one of mixer truck, including above-mentioned first aspect embodiment
Hydraulic steering system, the first fuel tank 30 of hydraulic steering system is the chassis steering oil vessel of mixer truck, hydraulic steering system
Second fuel tank 40 is the upper charge of oil case of mixer truck.
In this embodiment, by using the hydraulic steering system of any of the above-described embodiment, to be provided with above-mentioned reality
Whole beneficial effects of example are applied, details are not described herein.
It may also be noted that the first fuel tank 30 is the chassis steering oil vessel of mixer truck, the second oil of hydraulic steering system
Case 40 is the upper charge of oil case of mixer truck, and existing component on mixer truck is utilized in this way, does not need additionally to increase fuel tank, simplify
Structure saves space, and upper charge of oil tankage is bigger, and the oil liquid in fuel tank is more, is more advantageous to hydraulic oil radiating and cooling, keeps away
It is too fast to exempt from temperature rise.
In the above-described embodiments, the second radiator 44 of hydraulic steering system is the upper dress radiator of mixer truck, so not
It needs in addition to increase radiator on mixer truck, simplifies structure, save component and space, and the capacity of upper dress radiator
Greatly, radiating rate faster, has better radiating and cooling effect relative to the original steering radiator of hydraulic steering system.
As shown in figure 3, the embodiment of third aspect present invention, which provides one kind, is used for any one of above-mentioned second aspect in fact
The control method of the mixer truck of example is applied, the hydraulic steering system of mixer truck is equipped with the first circuit and second servo loop, and the first circuit
In second servo loop, one is connected state using as current loop, another is off-state using as standby circuit, two
Circuit can be switched over by switching device, and control method includes: step S100: obtain current loop oil temperature and standby circuit
Oil temperature；Step S102: judge whether current loop oil temperature is less than default secure threshold；Step S104: if so, control switching device
Keep current state；Step S106: if it is not, being commutated according to standby circuit Oil-temperature control switching device.
In this embodiment, oily by the current loop oil temperature and standby circuit that obtain the hydraulic steering system of mixer truck
Temperature, and judge whether current loop oil temperature is less than default secure threshold, it is greater than or equal to default safety threshold in current loop oil temperature
When value, commutated according to standby circuit Oil-temperature control switching device, the hydraulic oil of such hydraulic steering system can be in two circuits
In recycle in turn, so as to avoid causing oil temperature to steeply rise by a fuel tank fuel feeding always leading to that hydraulic oil is thinning, performance
Situations such as variation, so avoid output pressure decline, flow reduce, even not fuel feeding the phenomenon that, also delayed the old of sealing element
Change speed, ensure that the sealing performance of sealing element, extend the service life of components, improve the safety of hydraulic steering system
Property, reliability and durability.
It is appreciated that either the first circuit or second servo loop are required to avoid high oil temperature as current loop, and
When being switched to standby circuit, need to consider standby circuit oil temperature, if standby circuit oil temperature it is identical with current loop oil temperature or
Person is higher, just loses meaning then switching, therefore when controlling switching device switching, needs it is also contemplated that standby circuit oil
Temperature.
As shown in figure 4, according to the control method of the mixer truck of one embodiment of the application, comprising: step S200: obtaining
Current loop oil temperature and standby circuit oil temperature；Step S202: judging whether current loop oil temperature is less than default secure threshold, if
It is to execute step S210, if it is not, executing step S204；Step S204: judge whether standby circuit oil temperature is less than default safety threshold
Value, if so, step S208 is executed, if it is not, executing step S206；Step S206: current loop oil temperature and standby circuit oil are determined
The temperature difference between temperature, and judge whether the temperature difference is greater than temperature difference threshold, if so, step S208 is executed, if it is not, executing step S210；
Step S208: control switching device commutation；Step S210: control switching device keeps current state.
In this embodiment, before handover, the oil temperature for not only needing to consider standby circuit, the oil temperature in standby circuit are big
When fiducial temperature threshold value, it is also contemplated that the temperature difference between current loop oil temperature and standby circuit oil temperature, and in the temperature difference
When greater than temperature difference threshold, current loop and standby circuit can just be switched over, i.e., in switching, not only considered standby time
Whether road binders temperature is less than default secure threshold, it is also necessary to consider the gap of current loop oil temperature and standby circuit oil temperature between the two
Size, if gap between the two is smaller, the difference between current loop oil temperature and standby circuit oil temperature is less than in other words
When temperature difference threshold, illustrate that the two is closer to, switching has little significance at this time, therefore does not need to switch over；And it is greater than in the temperature difference
When temperature difference threshold, the switching in two circuits can make oil temperature significantly be reduced.
It is appreciated that the gap of current loop oil temperature and standby circuit oil temperature between the two, refers to that current loop oil temperature subtracts
Go the difference of standby circuit oil temperature.
In some embodiments, since current loop may be the first circuit, it is also possible to second servo loop, and two circuits
In it is of different sizes due to fuel tank, the heat-sinking capability of radiator is different, and the default secure threshold in two circuits may be identical, can also
It can be different.
As shown in figure 5, control method includes: step in the hydraulic steering system of the mixer truck of another embodiment
S300: the second of the current state in the first circuit and second servo loop and first oil temperature in the first circuit and second servo loop is obtained
Oil temperature；Step S310: if the current state in the first circuit is connection, the current state of second servo loop is to disconnect, and is determined first time
Road is current loop, and second servo loop is standby circuit；Step S312: judge the first oil temperature whether less than the first default safety threshold
Value, if so, step S362 is executed, if it is not, executing step S314；Step S314: judge whether the second oil temperature is default less than second
Secure threshold, if so, step S360 is executed, if it is not, executing step S316；Step S316: the first oil temperature and the second oil temperature are determined
Between first temperature difference, and judge whether first temperature difference is greater than the first temperature difference threshold, if so, step S360 is executed, if it is not, executing
Step S362；Step S320: if the current state in the first circuit is to disconnect, the current state of second servo loop is connection, determines the
Primary Ioops are standby circuit, and second servo loop is current loop；Step S322: judge the second oil temperature whether less than the second default safety
Threshold value, if so, step S362 is executed, if it is not, executing step S324；Step S324: judge whether the first oil temperature is pre- less than first
If secure threshold, if so, step S360 is executed, if it is not, executing step S326；Step S326: the second oil temperature and the first oil are determined
Second temperature difference between temperature, and judge whether second temperature difference is greater than the second temperature difference threshold, if so, step S360 is executed, if it is not, holding
Row step S362；Step S360: control switching device commutation；Step S362: control switching device keeps current state.
In the present embodiment, it is equipped with chassis steering oil vessel and chassis radiator in the first circuit, is equipped in second servo loop upper
Charge of oil case and upper dress radiator.
In this embodiment, the capacity of the upper charge of oil case in second servo loop is generally higher than the chassis steering oil in the first circuit
Case, therefore the oil liquid temperature rising in upper charge of oil case is more slow, and the heat-sinking capability of upper dress radiator radiates also greater than chassis
Device, i.e. the first circuit are different with the heat-sinking capability of second servo loop, and the heat dissipation performance of second servo loop is more preferable, and the oil temperature rate of climb is slow,
Therefore, the default secure threshold of the first circuit and second servo loop may also can be different, i.e., the first default secure threshold and second pre-
If secure threshold is different；Further, the first temperature difference threshold and the second temperature difference threshold may also be different.
It is appreciated that the first temperature difference threshold, the i.e. threshold value that the first oil temperature subtracts the difference of the second oil temperature, the second temperature difference threshold
Value, the i.e. threshold value that the second oil temperature subtracts the difference of the first oil temperature.
In this embodiment, different with the default secure threshold of second servo loop due to the first circuit, temperature difference threshold is also different,
Therefore it when deciding whether switching, first has to consider in the first circuit and second servo loop, which circuit is current loop, and root
Secure threshold is preset according to it to determine the need for switching；Such as first circuit be current loop when, then consider that the first oil temperature is
It is no to be greater than the first default secure threshold, while needing to consider the second oil temperature of second servo loop whether in the second default secure threshold
It is interior, it is switched over to avoid when the second oil temperature is higher, causes the oil temperature of the hydraulic steering system of mixer truck after switching that can not drop
It is low；As previously described, because the first default secure threshold and the second default secure threshold may be different, therefore, the first oil temperature is greater than
When the first default secure threshold, it may can't be greater than the second default secure threshold, it is therefore desirable to consider the second of second servo loop
Whether oil temperature and the second oil temperature are greater than the second default secure threshold；It is greater than the second default peace in the second oil temperature of second servo loop
When full threshold value, the first oil temperature and the second oil temperature are compared, if the two temperature difference is larger, are greater than the first temperature difference threshold, at this time
After switching, the effect for reducing hydraulic steering system oil temperature still can achieve, successively consider the first oil temperature, the second oil in this way
Difference between temperature, the first oil temperature and the second oil temperature, then the mode switched over, both may insure the oil temperature of hydraulic steering system
It is switched to another circuit when higher to cool down, avoids hydraulic oil temperature from steeply rising, advantageously reduces hydraulic steering system
Failure rate, and the case where oil temperature can be caused to rise or can not reduce faster to avoid invalid switching.
When second servo loop is current loop, handoff procedure is that the handoff procedure of current loop is similar with the first circuit,
Details are not described herein.
According to the steering hydraulic system of the mixer truck of a specific embodiment of the application proposition, in existing steering hydraulic
On the basis of system, using the hydraulic circuit in existing hydraulic steering system as the first circuit, by the hydraulic of the upper dress of mixer truck
For example upper charge of oil case of attachment, upper dress radiator are incorporated in existing hydraulic steering system and form second servo loop, pass through temperature sensing
Device makes hydraulic oil toggle circulation in the first circuit and second servo loop the detection of oil temperature and the commutation of reversal valve, thus
It avoids hydraulic oil heating too fast, reduces oil temperature.
Specifically, as shown in Fig. 2, a kind of double loop hydraulic steering system of mixer truck is by power steering stgear 20, engine,
Steering pump 22, the first radiator 34 (i.e. chassis steering radiator), the first fuel tank 30 (i.e. chassis steering oil vessel), the second fuel tank
40 (i.e. upper charge of oil casees), the second radiator 44 (i.e. upper to fill radiator), the first electromagnetic hydraulic pressure reversal valve 24 and the second electromagnetic hydraulic pressure
Reversal valve 26, controller 28, the composition such as the first temperature sensor 32 and second temperature sensor 42.
Upper dress radiator, preferably active radiator.
The second fuel tank 40, the second radiator 44 in the hydraulic services of upper dress are incorporated in steering hydraulic system, form second
Circuit, two circuits are separately installed with the first temperature sensor 32, second temperature sensor 42 monitors oil temperature.
Work process is as follows:
Controller receives the oil temperature signal of the first temperature sensor 32 of processing, second temperature sensor 42, when the first circuit
The first oil temperature when being in dangerous work area, i.e. when first oil temperature in the first circuit is greater than the first default secure threshold, controller
It sends warning signal, and the first electromagnetic hydraulic pressure of automatic trigger reversal valve 24 and the commutation of the second electromagnetic hydraulic pressure reversal valve 26, makes to turn to
Hydraulic system is switched to second servo loop, and using the second fuel tank 40 of upper dress, such as (upper dress dissipates for upper charge of oil case and the second radiator 44
Hot device) it radiates, reduce the oil temperature in hydraulic steering system；It, should also be true before the first loop switch to second servo loop
Whether the second oil temperature in second servo loop is determined less than the second default secure threshold, i.e. the second oil temperature is located at safety operation area, ability
Enough switch over；Similarly, when the second oil temperature of second servo loop is in dangerous work area, i.e. the second oil temperature of second servo loop is big
When the second default secure threshold, controller sends warning signal, while being made a policy according to the first oil temperature state, if the first oil
Temperature has been restored to safety operation area, i.e. the first oil temperature is greater than temperature difference threshold less than the first default secure threshold, or both the temperature difference,
Then trigger the first electromagnetic hydraulic pressure reversal valve 24, the second electromagnetic hydraulic pressure reversal valve 26 switches back to the first circuit, otherwise remain unchanged.
The technical scheme of the present invention has been explained in detail above with reference to the attached drawings, according to the technical solution of the present invention, effectively keeps away
The oil temperature rising for having exempted from hydraulic steering system is too fast, improves safety, stability and the reliability of hydraulic steering system work,
Meanwhile the upper dress hydraulic services of mixer truck being incorporated into hydraulic steering system, it does not need additionally to increase radiator and fuel tank, letter
Change structure, saves space.
In the present invention, term " first ", " second ", " third " are only used for the purpose of description, and should not be understood as indicating
Or imply relative importance；Term " multiple " then refers to two or more, unless otherwise restricted clearly.Term " installation ",
The terms such as " connected ", " connection ", " fixation " shall be understood in a broad sense, for example, " connection " may be a fixed connection, being also possible to can
Dismantling connection, or be integrally connected；" connected " can be directly connected, can also be indirectly connected through an intermediary.For this
For the those of ordinary skill in field, the specific meanings of the above terms in the present invention can be understood according to specific conditions.
In description of the invention, it is to be understood that the instructions such as term " on ", "lower", "left", "right", "front", "rear"
Orientation or positional relationship is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of the description present invention and simplification is retouched
It states, rather than the device or unit of indication or suggestion meaning must have specific direction, be constructed and operated in a specific orientation,
It is thus impossible to be interpreted as limitation of the present invention.
In the description of this specification, the description of term " one embodiment ", " some embodiments ", " specific embodiment " etc.
Mean that particular features, structures, materials, or characteristics described in conjunction with this embodiment or example are contained at least one reality of the invention
It applies in example or example.In the present specification, schematic expression of the above terms are not necessarily referring to identical embodiment or reality
Example.Moreover, description particular features, structures, materials, or characteristics can in any one or more of the embodiments or examples with
Suitable mode combines.
These are only the preferred embodiment of the present invention, is not intended to restrict the invention, for those skilled in the art
For member, the invention may be variously modified and varied.All within the spirits and principles of the present invention, it is made it is any modification,
Equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of hydraulic steering system characterized by comprising
Power steering stgear (20), for turning to；
Steering pump (22) is connected to the power steering stgear (20), and the steering pump (22) is used to be the electronic-controlled power steering
Device (20) provides power steering；
First circuit, first circuit are equipped with the first fuel tank (30)；
Second servo loop, the second servo loop are equipped with the second fuel tank (40)；
Switching device, the switching device optionally make any one circuit and institute in the first circuit and second servo loop
Steering pump (22) is stated to be connected to the power steering stgear (20).
2. hydraulic steering system according to claim 1, which is characterized in that further include:
First temperature sensor (32) is set in first circuit, to detect the first oil temperature in first circuit；
Controller (28) is all connected with first temperature sensor (32), the switching device, and the controller (28) is used for
According to first oil temperature, controls the switching device and switch first circuit and the second servo loop.
3. hydraulic steering system according to claim 2, which is characterized in that further include:
Second temperature sensor (42) is set in the second servo loop, described to detect the second oil temperature in the second servo loop
Second temperature sensor (42) is connected with the controller (28)；
The controller (28) is also used to control switching device switching institute according to first oil temperature and second oil temperature
State the first circuit and the second servo loop.
4. hydraulic steering system according to claim 3, which is characterized in that further include:
First radiator (34) is set in first circuit, and first radiator (34) is radiated for first circuit；
And/or
Second radiator (44) is set in the second servo loop, and second radiator (44) is radiated for the second servo loop.
5. hydraulic steering system described in any one of -4 according to claim 1, which is characterized in that
The switching device includes the first electromagnetic hydraulic pressure reversal valve (24) and the second electromagnetic hydraulic pressure reversal valve (26)；
The first interface of the first electromagnetic hydraulic pressure reversal valve (24) is connect with the power steering stgear (20), first electromagnetism
The second interface of hydraulicdirectional control valve (24) is connect with first circuit, and the third of the first electromagnetic hydraulic pressure reversal valve (24) connects
Mouth is connect with the second servo loop；
The first interface of the second electromagnetic hydraulic pressure reversal valve (26) is connect with the steering pump (22), second electromagnetic liquid
The second interface of pressure reversal valve (26) is connect with first circuit, the third interface of the second electromagnetic hydraulic pressure reversal valve (26)
It is connect with the second servo loop.
6. a kind of mixer truck, which is characterized in that
Including hydraulic steering system of any of claims 1-5, the first fuel tank (40) of the hydraulic steering system
For the chassis steering oil vessel of the mixer truck, the second fuel tank (40) of the hydraulic steering system is the upper charge of oil of the mixer truck
Case.
7. mixer truck according to claim 6, which is characterized in that
The second radiator (44) of the hydraulic steering system is the upper dress radiator of the mixer truck.
8. a kind of control method for mixer truck described in claim 6 or 7, the first circuit of the mixer truck and second time
Lu Zhong, one is connected state using as current loop, another is off-state using as standby circuit, which is characterized in that
Include:
Step S100: current loop oil temperature and standby circuit oil temperature are obtained；
Step S102: judge whether the current loop oil temperature is less than default secure threshold；
Step S104: if the current loop oil temperature is less than the default secure threshold, control switching device keeps current state；
Step S106: if the current loop oil temperature is greater than or equal to the default secure threshold, according to the standby circuit oil
The commutation of switching device described in temperature control system.
9. control method according to claim 8, which is characterized in that
It is described to be commutated according to standby circuit Oil-temperature control switching device, it specifically includes:
Judge whether the standby circuit oil temperature is less than the default secure threshold；
If the standby circuit oil temperature is less than the default secure threshold, the switching device commutation is controlled；
If the standby circuit oil temperature be greater than or equal to the default secure threshold, determine the current loop oil temperature and it is described to
The temperature difference between the oil temperature of machine circuit, and judge whether the temperature difference is greater than temperature difference threshold；
If the temperature difference is greater than the temperature difference threshold, the switching device commutation is controlled；
If the temperature difference is less than or equal to the temperature difference threshold, controls the switching device and keep current state.
10. control method according to claim 9, which is characterized in that the acquisition current loop oil temperature and standby circuit
Oil temperature specifically includes:
Obtain the current state in first circuit and the second servo loop and first oil temperature in first circuit and described
Second oil temperature of second servo loop；
If first circuit communication, the second servo loop is disconnected, and determines that first circuit is the current loop, described the
Secondary circuit is the standby circuit；
If first circuit disconnects, the second servo loop connection determines that first circuit is the standby circuit, described the
Secondary circuit is the current loop；
When first circuit is the current loop, and the second servo loop is the standby circuit, work as described in the judgement
Whether front loop oil temperature is less than default secure threshold, specifically includes:
Judge first oil temperature whether less than the first default secure threshold；
If the current loop oil temperature is less than the default secure threshold, controls the switching device and keeps current state,
It specifically includes:
If first oil temperature controls the switching device and keeps current state less than the first default secure threshold；
If the current loop oil temperature is greater than or equal to the default secure threshold, according to the standby circuit Oil-temperature control
The switching device commutation, specifically includes:
If first oil temperature is greater than or equal to the described first default secure threshold, judge second oil temperature whether less than second
Default secure threshold；
If second oil temperature is less than the described second default secure threshold, the switching device commutation is controlled；
If second oil temperature is greater than or equal to the described second default secure threshold, first oil temperature and second oil are determined
First temperature difference between temperature, and judge whether first temperature difference is greater than the first temperature difference threshold；
If first temperature difference is greater than first temperature difference threshold, the switching device commutation is controlled；
If first temperature difference is less than or equal to first temperature difference threshold, the current state of the switching device is kept；
When first circuit is the standby circuit, and the second servo loop is the current loop, work as described in the judgement
Whether front loop oil temperature is less than default secure threshold, specifically includes:
Judge second oil temperature whether less than the second default secure threshold；
If the current loop oil temperature is less than the default secure threshold, controls the switching device and keeps current state,
It specifically includes:
If second oil temperature is less than the described second default secure threshold, controls the switching device and keep current state；
If the current loop oil temperature is greater than or equal to the default secure threshold, according to the standby circuit Oil-temperature control
The switching device commutation, specifically includes:
If second oil temperature is greater than or equal to the described second default secure threshold, it is described to judge whether first oil temperature is less than
First default secure threshold；
If first oil temperature is less than the described first default secure threshold, the switching device commutation is controlled；
If first oil temperature is greater than or equal to the described first default secure threshold, second oil temperature and first oil are determined
Second temperature difference between temperature, and judge whether second temperature difference is greater than the second temperature difference threshold；
If second temperature difference is greater than second temperature difference threshold, the switching device commutation is controlled；
If second temperature difference is less than or equal to the second temperature difference threshold, the current state of the switching device is kept.
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