CN110043523A - Prevent that being emptied hydraulic system and hydraulic system prevents being emptied method - Google Patents
Prevent that being emptied hydraulic system and hydraulic system prevents being emptied method Download PDFInfo
- Publication number
- CN110043523A CN110043523A CN201810043449.4A CN201810043449A CN110043523A CN 110043523 A CN110043523 A CN 110043523A CN 201810043449 A CN201810043449 A CN 201810043449A CN 110043523 A CN110043523 A CN 110043523A
- Authority
- CN
- China
- Prior art keywords
- motor
- emptied
- oil
- hydraulic system
- valve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B20/00—Safety arrangements for fluid actuator systems; Applications of safety devices in fluid actuator systems; Emergency measures for fluid actuator systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/08—Servomotor systems incorporating electrically operated control means
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The present invention provides one kind to prevent that being emptied hydraulic system and hydraulic system prevents being emptied method, is related to technical field of agricultural machinery, including fuel tank, oil pump, motor, control valve and first prevent being emptied device；Closed circuit is formed between fuel tank and motor, oil pump is set between fuel tank and motor；Control valve is set between oil pump and motor；The first anti-device that is emptied is set between control valve and motor, and the oil inlet of one end and motor connects, and the oil outlet of the other end and motor connects；The first anti-device that is emptied is solenoid valve；When the oil pressure of motor oil inlet is greater than the oil pressure of motor oil outlet, solenoid valve is closed；When the oil pressure of motor oil inlet is less than the oil pressure of motor oil outlet, hydraulic oil through motor oil outlet, anti-be emptied device and flow to motor oil inlet.The present invention can be realized motor oil inlet and oil outlet high-speed communication, and first prevents being emptied device to be automatically to be emptied oil circuit to supplement corresponding hydraulic oil, avoid because of component wear caused by being emptied or other potential faults.
Description
Technical field
The present invention relates to technical field of agricultural machinery, are emptied hydraulic system and the anti-suction of hydraulic system more particularly, to one kind is anti-
Short side method.
Background technique
Cropper is essential mechanical equipment in agricultural production, can be used for the harvesting of crop, threshing, cleans.It receives
Obtaining owner will be made of driving system, equipment system, steering system etc..Equipment system includes multiple functions, is held
Units type of sports has reciprocating motion, rotary motion.Traditional cropper equipment move back and forth work substantially by
Oil cylinder driving is realized, and the work of rotary motion is realized by chain drive substantially.Novel intelligent fluid power system, rotation fortune
Dynamic equipment selection is driven by hydraulic motor, and by operation pump, control valve, motor, oil pipe, executing agency, (winder is stirred
Dragon, cutter etc.).When rotary work device is failure to actuate, the hydraulic oil of working barrel flows back to fuel tank by the Median Function of control valve,
When equipment needs to rotate, by control valve, pressure oil drive motor is allowed to drive in different rotary work states
Executing agency is acted.
Under normal circumstances, oil pump provides pressure oil to the agricultural machinery such as existing cropper, realizes pressure by control valve
Oil circuit passes through motor, the movement of driving executing agency.In present application, if control valve is instantaneously closed, motor oil inlet end is closed
It closing, no pressure oil enters, and theoretically motor output shaft stops operating, and in real work, especially in executing agency, high speed is revolved
When turning, because of effect of inertia, continues to run and drive motor rotation, motor output shaft passive rotation becomes pumping function form, and motor is former
Pressure end becomes oil absorbing end, closes control valve and motor oil inlet side oil liquid is caused to be sucked away, if the pressure of motor oil inlet side is proper
When reaching easily the air separation pressure of oil, the air being dissolved in oil liquid originally will be largely precipitated, and form free state
Bubble, persistently there is negative pressure state in the pipeline of motor oil inlet side, when next work executes, the bubble of precipitation enters horse
It reaches, bubble ruptures or disappears, form very high local high-frequency compression shock, cause hydraulic due to being reduced by high pressure at this time
Component wear and some other hidden danger.
Summary of the invention
The purpose of the present invention is to provide one kind to prevent that being emptied hydraulic system and hydraulic system prevents being emptied method, can be realized horse
Up to oil inlet and oil outlet high-speed communication, system anti-is emptied device automatically and is that be emptied oil circuit supplement corresponding hydraulic by first
Oil, and no longer there is negative pressure substantially in hydraulic system, avoids because of component wear caused by being emptied or other potential faults.
To achieve the above object, the present invention the following technical schemes are provided:
In a first aspect, the present invention provides and a kind of anti-is emptied hydraulic system, comprising: fuel tank, oil pump, motor, control valve and the
One prevents being emptied device；
Form closed circuit between the fuel tank and the motor, the oil pump be set to the fuel tank and the motor it
Between, for the oil pump in the fuel tank to be entered the motor；
The control valve is set between the oil pump and the motor, for controlling the oil inlet quantity of the motor；
The described first anti-device that is emptied is set between the control valve and the motor, the oil inlet of one end and the motor
Mouth connection, the other end are connect with the oil outlet of the motor；
The described first anti-device that is emptied is solenoid valve；When the oil pressure of the motor oil inlet is greater than the motor oil outlet
When oil pressure, the solenoid valve is closed；When the oil pressure of the motor oil inlet is less than the oil pressure of the motor oil outlet, hydraulic oil
Through the motor oil outlet, described anti-it be emptied device and flow to the motor oil inlet.
Further, described first prevents that being emptied device includes 2/2-way valve.
Further, prevent that being emptied hydraulic system further includes monitoring device and control device；
The monitoring device is connect with the control device, the equal signal of the solenoid valve, for monitoring the control valve
The revolving speed of state and the motor；When the monitoring device monitors the control valve moment closing, there are revolving speeds with the motor
When the two conditions exist simultaneously, the control device controls the solenoid valve and opens.
Further, the monitoring device further includes speed probe, and the speed probe and the control device are believed
Number connection, be sent to the control device for monitoring the rotary speed information of the motor, and by the rotary speed information.
Further, it is described it is anti-be emptied hydraulic system further include second it is anti-be emptied device, described second it is anti-be emptied device and
Described first prevents being emptied device parallel connection.
Further, the described second anti-device that is emptied is check valve.
Further, two position four-way valves are connected between the control valve and the motor, two position four-way valve is used for
Control the oil pressure balance between the control valve and the motor.
Further, described to prevent that being emptied hydraulic system further includes overflow valve, described overflow valve one end and the control valve
Oil inlet connection, the other end and the fuel tank connection.
Second aspect prevents being emptied method the present invention also provides a kind of hydraulic system, comprising:
Obtain the control signal message of motor oil inlet；
Judge whether the control signal mutates according to the control signal message；
When the control signal mutates, the rotary speed information of the motor is obtained；
Judge whether the revolving speed of the motor is zeroed by the rotary speed information；
When the revolving speed of the motor is not zeroed, the first anti-device that is emptied is opened；
When the revolving speed of motor zero, the first anti-device that is emptied is closed.
It is further, described to judge whether the control signal mutates according to the control signal message, comprising:
Obtain the current information of control valve；Current changing rate is obtained by the current information, and is become according to the electric current
Rate judges whether the control valve instantaneously closes, and when the control valve is instantaneously closed, the control signal mutates.
It is provided by the invention to prevent that being emptied hydraulic system and hydraulic system prevents that being emptied method has the advantages that
First aspect present invention provides one kind and prevents being emptied hydraulic system, comprising: fuel tank, oil pump, motor, control valve and first
It is anti-to be emptied device；Form closed circuit between fuel tank and motor, oil pump is set between fuel tank and motor, for by the oil in fuel tank
It is pumped into motor；Control valve is set between oil pump and motor, for controlling the oil inlet quantity of motor；The first anti-device that is emptied is set to control
Between valve and motor, the oil inlet of one end and motor is connected, and the oil outlet of the other end and motor connects；First prevents being emptied device
For solenoid valve；When the oil pressure of motor oil inlet is greater than the oil pressure of motor oil outlet, solenoid valve is closed；When the oil of motor oil inlet
When pressure is less than the oil pressure of motor oil outlet, hydraulic oil through motor oil outlet, anti-be emptied device and flow to motor oil inlet.
Compared with prior art, hydraulic system is emptied using the anti-of first aspect present invention offer, the oil in fuel tank passes through
Oil pump is delivered to motor oil inlet through control valve, is most back to fuel tank through motor oil outlet afterwards.Motor high pressure oil inlet entrance with
Increase solenoid valve between oil return opening, controlled according to operating condition, realize the oil inlet of motor high pressure and low pressure oil return connection and
It disconnects.When operating normally, the solenoid valve that two hydraulic fluid port of motor is connected is in close state, and high pressure oil can not be directly entered oil return
End, but drive motor is operating normally.When control valve is instantaneously closed, executing agency's high speed rotation, because of effect of inertia, executing agency
When driving motor rotation, solenoid valve control motor fuel feed hole and motor oil outlet high-speed communication, system pass through the oil duct and are automatically
It is emptied oil circuit and supplements corresponding hydraulic oil, and negative pressure no longer occurs substantially in hydraulic system, avoid because element damages caused by being emptied
Bad or other potential faults.
The anti-method that is emptied of the hydraulic system that second aspect of the present invention provides is using anti-being emptied of first aspect present invention offer
Hydraulic system, to be emptied all beneficial effects possessed by hydraulic system with the anti-of first aspect present invention offer.Also,
The tach signal of valve signal and motor is controlled by detection high-pressure oil passage, system judges automatically motor and is in abnormal hydraulic suction
Dummy status, control device issue signal, and the solenoid valve of control connection motor oil inlet and outlet makes motor both ends high-speed communication, system
Automatically be to be emptied oil circuit to supplement corresponding hydraulic oil, and negative pressure no longer occurs substantially in hydraulic system by the oil duct, avoid because
Component wear caused by being emptied or other potential faults.
Detailed description of the invention
It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution in the prior art
Embodiment or attached drawing needed to be used in the description of the prior art be briefly described, it should be apparent that, it is described below
Attached drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not making the creative labor
It puts, is also possible to obtain other drawings based on these drawings.
Fig. 1 is the anti-structural schematic diagram for being emptied hydraulic system provided in an embodiment of the present invention；
Fig. 2 is the anti-control principle drawing for being emptied hydraulic system provided in an embodiment of the present invention；
Fig. 3 is the anti-flow chart for being emptied method of hydraulic system provided in an embodiment of the present invention.
Icon: 1- fuel tank；2- oil pump；3- motor；4- control valve；5- first is anti-to be emptied device；6- monitoring device；7- control
Device；8- second is anti-to be emptied device；Two position four-way valve of 9-；10- overflow valve；61- speed probe.
Specific embodiment
Technical solution of the present invention is clearly and completely described below in conjunction with attached drawing, it is clear that described implementation
Example is a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill
Personnel's every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that term " center ", "upper", "lower", "left", "right", "vertical",
The orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" be based on the orientation or positional relationship shown in the drawings, merely to
Convenient for description the present invention and simplify description, rather than the device or element of indication or suggestion meaning must have a particular orientation,
It is constructed and operated in a specific orientation, therefore is not considered as limiting the invention.In addition, term " first ", " second ",
" third " is used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
To be mechanical connection, it is also possible to be electrically connected；It can be directly connected, can also can be indirectly connected through an intermediary
Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood at this with concrete condition
Concrete meaning in invention.
Below in conjunction with attached drawing, detailed description of the preferred embodiments.It should be understood that this place is retouched
The specific embodiment stated is merely to illustrate and explain the present invention, and is not intended to restrict the invention.
Please refer to Fig. 1, Fig. 2 and Fig. 3, below in conjunction with attached drawing to it is provided in an embodiment of the present invention it is anti-be emptied hydraulic system and
Hydraulic system prevents that being emptied method elaborates.
The embodiment of first aspect present invention provides one kind and prevents being emptied hydraulic system, comprising: fuel tank 1, oil pump 2, motor
3, control valve 4 and first is prevented being emptied device 5；
Closed circuit is formed between fuel tank 1 and motor 3, oil pump 2 is set between fuel tank 1 and motor 3, and being used for will be in fuel tank 1
Oil pump 2 enter motor 3；
Control valve 4 is set between oil pump 2 and motor 3, for controlling the oil inlet quantity of motor 3；
The first anti-device 5 that is emptied is set between control valve 4 and motor 3, and one end is connect with the oil inlet of motor 3, another
End is connect with the oil outlet of motor 3；
The first anti-device 5 that is emptied is solenoid valve；When the oil pressure of 3 oil inlet of motor is greater than the oil pressure of 3 oil outlet of motor, electricity
Magnet valve is closed；When the oil pressure of 3 oil inlet of motor is less than the oil pressure of 3 oil outlet of motor, hydraulic oil is through 3 oil outlet of motor, anti-suction
Empty device flows to 3 oil inlet of motor.
Compared with prior art, using the embodiment of first aspect present invention provide it is anti-be emptied hydraulic system, in fuel tank 1
Oil 3 oil inlet of motor through control valve 4 is delivered to by oil pump 2, be most back to fuel tank 1 through 3 oil outlet of motor afterwards.In motor 3
Increase solenoid valve between high pressure oil inlet entrance and oil return opening, controlled according to operating condition, realizes 3 high pressure oil inlet of motor and low
Push back switching on and off for oil.When operating normally, the solenoid valve that 3 liang of hydraulic fluid ports of motor are connected is in close state, high pressure oil
It can not be directly entered oil revolving end, but drive motor 3 is operating normally.It is closed when control valve 4 is instantaneous, executing agency's high speed rotation,
Because of effect of inertia, when executing agency drives motor 3 to rotate, 3 fuel feed hole of solenoid valve control motor and 3 oil outlet of motor quickly connect
Logical, system is to be emptied oil circuit to supplement corresponding hydraulic oil, and negative pressure no longer occurs substantially in hydraulic system by the oil duct automatically,
It avoids because of component wear caused by being emptied or other potential faults.
In the optional scheme of the present embodiment, further, the first anti-device 5 that is emptied includes 2/2-way valve.At least
In one embodiment, control valve 4 is proportioning valve, and the adjusting of 3 revolving speed of motor, tool are realized by the Y1a Signal Regulation of comparative example valve
Body, the Y1a signal of proportioning valve is slowly adjusted, and when especially slowly adjusting decline, passes through the pressure oil stream amount of 2/2-way valve
Slowly reduce, and motor 3 reduces speed with inflow flow and consequently also slowly reduces, changes in flow rate amount and 3 amount of speed reduction of motor
Proportional, the flow of input just meets motor 3 and rotates required flow, opens when Y1a is reduced to the minimum of solenoid valve
Value, i.e. proportioning valve are closed, and 3 revolving speed of motor is also decreased to zero, at this time pipeline do not occur being emptied substantially, negative pressure state.First
The anti-device 5 that is emptied is without coming into operation, i.e., solenoid valve is in close state.
In the optional scheme of the present embodiment, further, the anti-hydraulic system that is emptied further includes monitoring device 6 and control dress
Set 7；
Monitoring device 6 connect with control device 7, the equal signal of solenoid valve, for monitoring the state and motor 3 of control valve 4
Revolving speed；When monitoring device 6 monitors that 4 moment of control valve closes and motor 3 is existed simultaneously there are revolving speed the two conditions, control
Device 7 controls solenoid valve and opens.
It should be noted that the Y1a signal of proportioning valve is quickly adjusted, especially electric current is in maximum value, and motor 3 is in height
Speed rotation, system pressure oil flow completely through 3 oil return box 1 of motor.When quick closedown proportioning valve operation handle, i.e. proportional valve control is believed
Number Y1a is rapidly reduced to the minimum firing current value even zero of proportioning valve, spool quick acting, and proportioning valve is instantaneously closed,
So that proportioning valve rear oil duct no pressure oil inputs.At this time monitoring device 6 monitor electric current moment reduce change to zero-bit (or certain
One setting value), while the revolving speed of monitoring motor 3, when motor 3, which is kept, runs at high speed state, control device 7 is made quickly
Reaction realizes that moment judges and execute movement, and the Ya2 of solenoid valve is electricly instantaneous, and solenoid valve is quickly opened.3A mouthfuls and B mouthfuls of motor
When immediately connecting, and continuing high-speed rotating executing agency motor 3 is driven to rotate, the hydraulic oil that 3B mouthfuls of motor very smoothly into
Enter A mouthfuls, avoids emptying phenomenon completely.As slow reduction of speed, monitoring device 6 monitor motor 3 under mechanical resistance for executing agency
Speed is reduced to zero, and motor 3 is not rotating, and the control signal that systems stay monitors proportioning valve is zero, and the letter of 3 revolving speed of motor
It number is also zero-bit, the Ya2 automatically controlled signal of solenoid valve also disconnects therewith, and 3A, B mouthfuls of oil circuits of motor also disconnect.The present embodiment by
3 both ends of motor increase by first for having pipeline connection or closing and prevent being emptied device 5, by monitoring the letter in proportioning valve oil inlet end
Number and 3 tach signal of motor can instantaneously be opened when motor 3 is emptied, realize the free communications and liaison of pipeline.And it is emptied in releasing
Afterwards, prevent being emptied the closing that solenoid valve automatic control signal realizes pipeline.Without human intervention and intervene, realizes intelligentized control method.
In at least one embodiment, monitoring device 6 passes through the current information of current sensor real-time inspection and control valve 4.
In the optional scheme of the present embodiment, further, monitoring device 6 further includes speed probe 61, revolution speed sensing
Device 61 is connect with 7 signal of control device, is sent to control device 7 for the rotary speed information of monitoring motor 3, and by rotary speed information.
Increase by first for having pipeline connection or closing at 3 both ends of motor to prevent being emptied device 5, sensor monitoring motor 3 of increasing speed
Rotation speed, while monitoring proportioning valve and solenoid signal.
In the optional scheme of the present embodiment, further, it is anti-be emptied hydraulic system further include second it is anti-be emptied device 8,
The second anti-device 8 and first that is emptied is prevented being emptied 5 parallel connection of device.Second prevents that being emptied device 8 and first prevents being emptied 5 parallel connection of device, with
For when first prevents that being emptied device 5 special circumstances cisco unity malfunction occurs, play the role of anti-be emptied.Second prevents being emptied device
8 alternately emergency plans, preferably make whole system avoid component wear or other failures caused by being emptied because of motor 3 hidden
Suffer from.
In the optional scheme of the present embodiment, further, the second anti-device 8 that is emptied is check valve.In 3 liang of hydraulic fluid ports of motor
Between check valve is installed, oil liquid can be disconnected with one-way flow, control valve 4 so that 3 oil revolving end of motor carries out makeup oil to oil inlet end
Liquid, since there are certain cracking pressures for check valve, substantially in the case where 3 oil inlet end of motor is in negative pressure, motor 3
The oil liquid of oil return side can just be added to and is emptied in the pipeline of survey.
In the optional scheme of the present embodiment, further, two position four-way valves 9 are connected between control valve 4 and motor 3,
Two position four-way valves 9 are used to control the oil pressure balance between control valve 4 and motor 3.
As shown in Figure 1, hydraulic system provides power drive steering pump 2 by engine, do not carried out in rotary actuator
When operation, the hydraulic oil that oil pump 2 exports passes through control valve 4, only needs the pressure of very little, which, which is used as, overcomes two position four-way valves 9
Spring force so that two position four-way valves 9 are in right part function, 1. oil duct is arrived and is 2. connected, 3. oil duct is arrived and 4. disconnected, and oil liquid is directly logical
Oil return box 1.
When rotary actuator needs to act, by adjusting the Y1a signal of proportioning valve, 2/2-way valve is opened, and two
9 both ends of four-way valve control pressure oil balance, and spring pushes spool, so that two position four-way valves 9 are in left side working position, 3. oil duct arrives
4. circulating, 1. oil duct is arrived and is 2. closed, and pressure oil rotates motor 3, drives executing agency's operation.
In the optional scheme of the present embodiment, further, prevent that being emptied hydraulic system further includes overflow valve 10, overflow valve 10
The oil inlet connection of one end and control valve 4, the other end and 1 connection of fuel tank.Overflow valve 10 is to guarantee system after working for motor 3
Pressure, while playing the role of safety valve.
Second aspect prevents being emptied method the present invention also provides a kind of hydraulic system, comprising:
Obtain the control signal message of 3 oil inlet of motor；
Judge to control whether signal mutates according to control signal message；
When controlling signal mutation, the rotary speed information of motor 3 is obtained；
Judge whether the revolving speed of motor 3 is zeroed by rotary speed information；
When the revolving speed of motor 3 is not zeroed, the first anti-device 5 that is emptied is opened；
When the revolving speed of motor 3 zero, the first anti-device 5 that is emptied is closed.
The anti-reality for being emptied method and using first aspect present invention of the hydraulic system that the embodiment of second aspect of the present invention provides
The anti-of example offer is provided and is emptied hydraulic system, so that the anti-of the offer of the embodiment with first aspect present invention is emptied hydraulic system institute
All beneficial effects having.Also, pass through detection 4 signal of high-pressure oil passage control valve and the tach signal of motor 3, system
Judge automatically motor 3 be in it is abnormal it is hydraulic be emptied state, control device 7 issues signal, the electricity of control connection 3 oil inlet and outlet of motor
Magnet valve, makes 3 both ends high-speed communication of motor, and system is to be emptied oil circuit to supplement corresponding hydraulic oil, and liquid by the oil duct automatically
No longer there is negative pressure substantially in pressure system, avoids because of component wear caused by being emptied or other potential faults.
In the optional scheme of the present embodiment, further, judge to control whether signal occurs according to control signal message
Mutation, comprising:
Obtain the current information of control valve 4；Current changing rate is obtained by current information, and is judged according to current changing rate
Whether control valve 4 instantaneously closes, and when control valve 4 is instantaneously closed, control signal mutates.
In at least one embodiment, control device 7 is preset with the preset value of a current changing rate, believes when by electric current
The current changing rate that breath obtains is greater than preset value, and control device 7 then thinks that control valve 4 is instantaneously closed.
It should be noted that changing to zero-bit (or a certain setting value) when monitoring device 6 monitors that electric current moment reduces
I.e. current changing rate is higher than preset value, while the revolving speed of monitoring motor 3, when motor 3, which is kept, runs at high speed state, control
Device 7 makes fast reaction, realizes that moment judges and execute movement, the Ya2 of solenoid valve is electricly instantaneous, and solenoid valve is quickly opened.
3A mouthfuls of motor is immediately connected with B mouthfuls, and when continuing high-speed rotating executing agency and driving the rotation of motor 3,3B mouthfuls of motor hydraulic
Oil smoothly enters A mouthfuls very much, avoids emptying phenomenon completely.As slow reduction of speed, monitoring fill under mechanical resistance for executing agency
It sets 6 and monitors that 3 speed of motor is reduced to zero, motor 3 is not rotating, and monitoring device 6 persistently monitors the control signal of proportioning valve
It is zero, and the signal of 3 revolving speed of motor is also zero-bit, the Ya2 automatically controlled signal of solenoid valve also disconnects therewith, 3A, B mouthfuls of oil circuits of motor
It disconnects.
Above to it is of the invention it is anti-be emptied hydraulic system and hydraulic system is anti-is emptied method and is illustrated, still, this hair
It is bright to be not limited to above-mentioned specific embodiment, without departing from the scope of the claims, various deformations can be carried out
Or change.The invention includes various changes and modifications within the scope of the claims.
Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Pipe is described in detail invention referring to foregoing embodiments, those skilled in the art should understand that: it is still
It is possible to modify the technical solutions described in the foregoing embodiments, or some or all of the technical features is carried out
Equivalent replacement；And these are modified or replaceed, it does not separate the essence of the corresponding technical solution various embodiments of the present invention technical side
The range of case.
Claims (10)
1. one kind is anti-to be emptied hydraulic system, comprising: fuel tank (1), oil pump (2), motor (3), control valve (4) and first are anti-to be emptied dress
Set (5)；
Form closed circuit between the fuel tank (1) and the motor (3), the oil pump (2) be set to the fuel tank (1) with it is described
Between motor (3), for the oil pump (2) in the fuel tank (1) to be entered the motor (3)；
The control valve (4) is set between the oil pump (2) and the motor (3), for controlling the oil inlet of the motor (3)
Amount；
Described first anti-be emptied device (5) are set between the control valve (4) and the motor (3), one end and the motor
(3) oil inlet connection, the other end are connect with the oil outlet of the motor (3)；
It is characterized in that, described first anti-be emptied device (5) are solenoid valve；When the oil pressure of the motor (3) oil inlet is greater than institute
When stating the oil pressure of motor (3) oil outlet, the solenoid valve is closed；When the oil pressure of the motor (3) oil inlet is less than the motor
(3) when the oil pressure of oil outlet, hydraulic oil through the motor (3) oil outlet, described anti-be emptied device and flow to the motor (3) oil inlet
Mouthful.
2. according to claim 1 prevent being emptied hydraulic system, which is characterized in that described first prevents that being emptied device (5) includes
2/2-way valve.
3. according to claim 2 prevent being emptied hydraulic system, which is characterized in that the anti-hydraulic system that is emptied further includes monitoring dress
Set (6) and control device (7)；
The monitoring device (6) connect with the control device (7), the equal signal of the solenoid valve, for monitoring the control valve
(4) revolving speed of state and the motor (3)；When the monitoring device (6) monitors the closing of the control valve (4) moment and institute
When stating motor (3) and existing simultaneously there are revolving speed the two conditions, the control device (7) controls the solenoid valve and opens.
4. according to claim 3 prevent being emptied hydraulic system, which is characterized in that the monitoring device (6) further includes revolving speed
Sensor (61), the speed probe (61) connect with the control device (7) signal, for monitoring the motor (3)
Rotary speed information, and the rotary speed information is sent to the control device (7).
5. anti-hydraulic system is emptied according to claim 3, which is characterized in that the anti-hydraulic system that is emptied further includes the
Two prevent being emptied device (8), and the described second anti-device (8) and described first that is emptied is prevented being emptied device (5) parallel connection.
6. according to claim 5 prevent being emptied hydraulic system, which is characterized in that described second anti-be emptied device (8) are single
To valve.
7. according to claim 1 prevent being emptied hydraulic system, which is characterized in that the control valve (4) and the motor (3)
Between be connected with two position four-way valves (9), two position four-way valve (9) for control the control valve (4) and the motor (3) it
Between oil pressure balance.
8. according to claim 1 prevent being emptied hydraulic system, which is characterized in that described to prevent that being emptied hydraulic system further includes overflowing
It flows valve (10), the oil inlet connection of described overflow valve (10) one end and the control valve (4), the other end and the fuel tank (1) join
It is logical.
9. a kind of hydraulic system is anti-to be emptied method characterized by comprising
Obtain the control signal message of motor (3) oil inlet；
Judge whether the control signal mutates according to the control signal message；
When the control signal mutates, the rotary speed information of the motor (3) is obtained；
Judge whether the revolving speed of the motor (3) is zeroed by the rotary speed information；
When the revolving speed of the motor (3) is not zeroed, first anti-be emptied device (5) are opened；
When the revolving speed of the motor (3) zero, first anti-be emptied device (5) are closed.
10. hydraulic system according to claim 9 is anti-to be emptied method, which is characterized in that described according to the control signal
Information judges whether the control signal mutates, comprising:
Obtain the current information of control valve (4)；Current changing rate is obtained by the current information, and according to the curent change
Rate judges whether the control valve (4) instantaneously closes, and when the control valve (4) is instantaneously closed, the control signal occurs prominent
Become.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810043449.4A CN110043523B (en) | 2018-01-17 | 2018-01-17 | Air suction prevention hydraulic system and air suction prevention method for hydraulic system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810043449.4A CN110043523B (en) | 2018-01-17 | 2018-01-17 | Air suction prevention hydraulic system and air suction prevention method for hydraulic system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110043523A true CN110043523A (en) | 2019-07-23 |
| CN110043523B CN110043523B (en) | 2022-01-21 |
Family
ID=67273076
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810043449.4A Active CN110043523B (en) | 2018-01-17 | 2018-01-17 | Air suction prevention hydraulic system and air suction prevention method for hydraulic system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110043523B (en) |
Citations (24)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5837304A (en) * | 1981-08-31 | 1983-03-04 | Hitachi Constr Mach Co Ltd | Inertia mass driving hydraulic circuit |
| CN86106036A (en) * | 1985-09-06 | 1987-05-20 | 日立建机株式会社 | Handle the hydraulic control circuit device that selector valve is used |
| JPH07331705A (en) * | 1994-06-03 | 1995-12-19 | Shin Caterpillar Mitsubishi Ltd | Oil hydraulic circuit for turning of construction machine |
| JPH11108004A (en) * | 1997-10-07 | 1999-04-20 | Kayaba Ind Co Ltd | Hydraulic control circuit |
| JP2000167891A (en) * | 1998-12-11 | 2000-06-20 | Japan Steel Works Ltd:The | Method for shortening injection starting-up time in controlling injecting speed |
| US6508328B1 (en) * | 1999-09-17 | 2003-01-21 | Champion Road Machinery Limited | All wheel drive for motor grades |
| JP2004169856A (en) * | 2002-11-21 | 2004-06-17 | Hitachi Constr Mach Co Ltd | Hydraulic motor drive circuit |
| JP2005169438A (en) * | 2003-12-10 | 2005-06-30 | Ube Techno Enji Kk | Mold clamping method |
| CN201132972Y (en) * | 2007-12-05 | 2008-10-15 | 三一重工股份有限公司 | Hydraulic drive fan cooling system and fan rotate speed control valve for engineering machinery |
| CN201203362Y (en) * | 2008-03-05 | 2009-03-04 | 广西柳工机械股份有限公司 | Heat radiation system of earth leveler capable of regulating speed |
| CN102155154A (en) * | 2010-07-09 | 2011-08-17 | 兰州理工大学 | Pressure controlled automatic reversing working device for punch of rock drilling machine |
| CN202065281U (en) * | 2011-05-17 | 2011-12-07 | 内蒙古北方重型汽车股份有限公司 | Buffer feed circuit for motor of cooler |
| CN202418067U (en) * | 2012-01-20 | 2012-09-05 | 中船重工中南装备有限责任公司 | High-speed hydraulic motor braking device |
| CN202833359U (en) * | 2012-08-20 | 2013-03-27 | 三一重工股份有限公司 | Open-type hydraulic system and engineering machinery |
| CN103216499A (en) * | 2013-05-08 | 2013-07-24 | 昆山晋桦豹胶轮车制造有限公司 | Hydraulic pump zero-load start device |
| CN204140518U (en) * | 2014-07-31 | 2015-02-04 | 徐州徐工基础工程机械有限公司 | Horizontal directional drilling machine equalizing main elastic force open type hydraulic system |
| CN104929999A (en) * | 2015-06-29 | 2015-09-23 | 宁波精垦液压有限公司 | Full-hydraulic driving control system |
| KR20150129072A (en) * | 2011-12-28 | 2015-11-19 | 두산인프라코어 주식회사 | Make up oil flow control device of swing motor |
| CN106015201A (en) * | 2016-08-11 | 2016-10-12 | 徐州重型机械有限公司 | Rotary control device and hydraulic control system |
| CN206320090U (en) * | 2016-11-16 | 2017-07-11 | 长沙黑金刚实业有限公司 | A kind of control device of high-speed hydraulic motor |
| CN106988374A (en) * | 2017-05-31 | 2017-07-28 | 徐州徐工挖掘机械有限公司 | A kind of excavator energy regenerating oil-supplementing system and its method |
| CN206668647U (en) * | 2017-03-08 | 2017-11-24 | 卡特彼勒（青州）有限公司 | Hydraulic system and there is its Work machine |
| CN107420361A (en) * | 2017-08-29 | 2017-12-01 | 长春设备工艺研究所 | A kind of pre-rotation hydraulic circuit |
| CN107448425A (en) * | 2017-07-21 | 2017-12-08 | 广西柳工机械股份有限公司 | Control valve and land leveller front wheel driven hydraulic system |
-
2018
- 2018-01-17 CN CN201810043449.4A patent/CN110043523B/en active Active
Patent Citations (24)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5837304A (en) * | 1981-08-31 | 1983-03-04 | Hitachi Constr Mach Co Ltd | Inertia mass driving hydraulic circuit |
| CN86106036A (en) * | 1985-09-06 | 1987-05-20 | 日立建机株式会社 | Handle the hydraulic control circuit device that selector valve is used |
| JPH07331705A (en) * | 1994-06-03 | 1995-12-19 | Shin Caterpillar Mitsubishi Ltd | Oil hydraulic circuit for turning of construction machine |
| JPH11108004A (en) * | 1997-10-07 | 1999-04-20 | Kayaba Ind Co Ltd | Hydraulic control circuit |
| JP2000167891A (en) * | 1998-12-11 | 2000-06-20 | Japan Steel Works Ltd:The | Method for shortening injection starting-up time in controlling injecting speed |
| US6508328B1 (en) * | 1999-09-17 | 2003-01-21 | Champion Road Machinery Limited | All wheel drive for motor grades |
| JP2004169856A (en) * | 2002-11-21 | 2004-06-17 | Hitachi Constr Mach Co Ltd | Hydraulic motor drive circuit |
| JP2005169438A (en) * | 2003-12-10 | 2005-06-30 | Ube Techno Enji Kk | Mold clamping method |
| CN201132972Y (en) * | 2007-12-05 | 2008-10-15 | 三一重工股份有限公司 | Hydraulic drive fan cooling system and fan rotate speed control valve for engineering machinery |
| CN201203362Y (en) * | 2008-03-05 | 2009-03-04 | 广西柳工机械股份有限公司 | Heat radiation system of earth leveler capable of regulating speed |
| CN102155154A (en) * | 2010-07-09 | 2011-08-17 | 兰州理工大学 | Pressure controlled automatic reversing working device for punch of rock drilling machine |
| CN202065281U (en) * | 2011-05-17 | 2011-12-07 | 内蒙古北方重型汽车股份有限公司 | Buffer feed circuit for motor of cooler |
| KR20150129072A (en) * | 2011-12-28 | 2015-11-19 | 두산인프라코어 주식회사 | Make up oil flow control device of swing motor |
| CN202418067U (en) * | 2012-01-20 | 2012-09-05 | 中船重工中南装备有限责任公司 | High-speed hydraulic motor braking device |
| CN202833359U (en) * | 2012-08-20 | 2013-03-27 | 三一重工股份有限公司 | Open-type hydraulic system and engineering machinery |
| CN103216499A (en) * | 2013-05-08 | 2013-07-24 | 昆山晋桦豹胶轮车制造有限公司 | Hydraulic pump zero-load start device |
| CN204140518U (en) * | 2014-07-31 | 2015-02-04 | 徐州徐工基础工程机械有限公司 | Horizontal directional drilling machine equalizing main elastic force open type hydraulic system |
| CN104929999A (en) * | 2015-06-29 | 2015-09-23 | 宁波精垦液压有限公司 | Full-hydraulic driving control system |
| CN106015201A (en) * | 2016-08-11 | 2016-10-12 | 徐州重型机械有限公司 | Rotary control device and hydraulic control system |
| CN206320090U (en) * | 2016-11-16 | 2017-07-11 | 长沙黑金刚实业有限公司 | A kind of control device of high-speed hydraulic motor |
| CN206668647U (en) * | 2017-03-08 | 2017-11-24 | 卡特彼勒（青州）有限公司 | Hydraulic system and there is its Work machine |
| CN106988374A (en) * | 2017-05-31 | 2017-07-28 | 徐州徐工挖掘机械有限公司 | A kind of excavator energy regenerating oil-supplementing system and its method |
| CN107448425A (en) * | 2017-07-21 | 2017-12-08 | 广西柳工机械股份有限公司 | Control valve and land leveller front wheel driven hydraulic system |
| CN107420361A (en) * | 2017-08-29 | 2017-12-01 | 长春设备工艺研究所 | A kind of pre-rotation hydraulic circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110043523B (en) | 2022-01-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103502696B (en) | For running method and the clutch speed changer of clutch speed changer | |
| CN103672126A (en) | Electro-hydraulic actuator | |
| CN102865261A (en) | Hydrostatic driving system | |
| JP4702385B2 (en) | Fan control device | |
| CN110131221A (en) | The hydraulic system of mechanical arm | |
| CN112682373A (en) | Hydraulic system, control method and engineering vehicle | |
| CN105179335A (en) | Hydraulic steering engine control system | |
| EP4368840A1 (en) | Hydraulic system for rotary machine tool | |
| CN110821759B (en) | Hydraulic variable propeller fault rapid positioning and safe shutdown method | |
| CN110043523A (en) | Prevent that being emptied hydraulic system and hydraulic system prevents being emptied method | |
| CN109854547A (en) | Long-range pressure regulation load-sensitive hydraulic station | |
| CN107046927B (en) | Hydraulic transmission system for independent header of combine harvester and application method of hydraulic transmission system | |
| CN206539544U (en) | A kind of servo-pump control hydraulic linear drive system of single-motor double pump | |
| CN108953260B (en) | Hydraulic control system and control method for crawler-type harvester | |
| CN207683266U (en) | A kind of pressure regulating system of craneman's house hydraulic-driven air conditioner | |
| CN114718921A (en) | High-reliability backward-falling rocket swing rod hydraulic system and control method | |
| CN101025171A (en) | Hydraulic-oil quantity distribution system for engineering vehicle hydraulic power air-conditioner | |
| CN210290301U (en) | Radar antenna lifting system | |
| CN109210022A (en) | A kind of hydraulic system for lid maker | |
| CN109210025A (en) | anti-cavitation hydraulic circuit | |
| CN209294175U (en) | Fan blowback control valve, fan blowback hydraulic system and farm machinery | |
| CN106321415B (en) | A kind of emulsion pump testing system and method | |
| CN108953261B (en) | Hydraulic control system and control method for crawler-type harvester | |
| CN203730898U (en) | Electric-hydraulic actuator | |
| CN206746105U (en) | Oil Cooler of Steam Turbine water inlet is automatically switched and filter screen self-cleaning device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: 261206 No. 192 South Beihai Road, Fangzi District, Shandong, Weifang Applicant after: Weichai leiwo Heavy Industry Co.,Ltd. Address before: 261000 No. 192 South Beihai Road, Fangzi District, Shandong, Weifang Applicant before: LOVOL HEAVY INDUSTRY Co.,Ltd. |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 261206 No. 192 South Beihai Road, Fangzi District, Shandong, Weifang Patentee after: Weichai Lovol Intelligent Agricultural Technology Co.,Ltd. Address before: 261206 No. 192 South Beihai Road, Fangzi District, Shandong, Weifang Patentee before: Weichai leiwo Heavy Industry Co.,Ltd. |