CN107939752B - Braking energy-saving hydraulic system and excavator - Google Patents
Braking energy-saving hydraulic system and excavator Download PDFInfo
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- CN107939752B CN107939752B CN201710935690.3A CN201710935690A CN107939752B CN 107939752 B CN107939752 B CN 107939752B CN 201710935690 A CN201710935690 A CN 201710935690A CN 107939752 B CN107939752 B CN 107939752B
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- oil
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- 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
- F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
- F15B1/02—Installations or systems with accumulators
- F15B1/027—Installations or systems with accumulators having accumulator charging devices
- F15B1/0275—Installations or systems with accumulators having accumulator charging devices with two or more pilot valves, e.g. for independent setting of the cut-in and cut-out pressures
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
- E02F9/2264—Arrangements or adaptations of elements for hydraulic drives
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
- E02F9/2264—Arrangements or adaptations of elements for hydraulic drives
- E02F9/2267—Valves or distributors
-
- 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
- F15B13/021—Valves for interconnecting the fluid chambers of an actuator
-
- 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
- F15B13/024—Pressure relief valves
-
- 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
- F15B21/001—Servomotor systems with fluidic control
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Operation Control Of Excavators (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The present invention relates to braking technology field, in particular to a kind of braking energy-saving hydraulic system and excavator.The braking energy-saving hydraulic system includes: hydraulic power mechanism, accumulator, the first oil storage valve and accumulation of energy oil-supply valve；First hydraulic fluid port of hydraulic power mechanism is connect by the first oil storage valve with accumulator；Accumulator also passes through accumulation of energy oil-supply valve and the second hydraulic fluid port of hydraulic power mechanism connects.The hydraulic oil of oil return line is passed through accumulator and stores when hydraulic power mechanism is braked, in hydraulic power mechanism starting, the hydraulic oil in accumulator is passed through hydraulic power mechanism again, fuel feeding is carried out to hydraulic power mechanism, the hydraulic oil of oil return line is lost by overflow valve when avoiding braking, avoid the waste of energy, simultaneously, on startup, hydraulic oil is supplied hydraulic power mechanism again by accumulator, the conversion that form of energy is not needed during this, also avoids the loss of energy in energy conversion process, improves utilization rate.
Description
Technical field
The present invention relates to braking technology field, in particular to a kind of braking energy-saving hydraulic system and excavator.
Background technique
About the turning course of hydraulic crawler excavator, in upper rotation (including the upper body, front end equipment of excavator
And related accessories, similarly hereinafter) by static turn round Acceleration of starting when, due to upper rotation be a huge inertia load,
Cause in Acceleration of starting, the overflow valve of motor oil inlet is opened, and hydraulic motor cannot fully absorb the hydraulic energy of main pump offer.
In the upper rotation braking of excavator, the oil inlet of hydraulic motor and oil return circuit are cut off, and oil return circuit is made in inertia
Under, pressure rise causes motor oil return opening overflow valve to be opened, and energy loss is big.
It is lost, is caused by overflow valve it follows that will lead to a large amount of hydraulic oil in excavating machine starting and braking
The waste of energy.
Summary of the invention
The purpose of the present invention is to provide a kind of braking energy-saving hydraulic system and excavators, to solve digging in the prior art
It will lead to the technical issues of a large amount of hydraulic oil is lost by overflow valve, causes the waste of energy when the starting of pick machine and braking.
The present invention provides a kind of braking energy-saving hydraulic system, which includes: hydraulic power mechanism, stores
It can device, the first oil storage valve and accumulation of energy oil-supply valve；First hydraulic fluid port of the hydraulic power mechanism passes through first oil storage
Valve is connect with the accumulator；The accumulator also passes through the accumulation of energy oil-supply valve and the second of the hydraulic power mechanism
Hydraulic fluid port connection；When hydraulic power mechanism braking, under the effect of inertia of the hydraulic power mechanism, the hydraulic power
First hydraulic fluid port of mechanism is by the first oil storage valve to the accumulator oil storage；When hydraulic power mechanism starting,
The accumulator can be by the accumulation of energy oil-supply valve to the second hydraulic fluid port fuel feeding of the hydraulic power mechanism；
Further, which further includes the second oil storage valve；The second of the hydraulic power mechanism
Hydraulic fluid port is connect by the second oil storage valve with the accumulator；The accumulation of energy oil-supply valve is four-way reversing valve；The storage
Can two hydraulic fluid ports of oil-supply valve be connected to respectively with the accumulator and the fuel tank, other two hydraulic fluid port respectively with it is described hydraulic
First hydraulic fluid port of power mechanism and the connection of the second hydraulic fluid port；
When the hydraulic power mechanism to the work of first direction of motion when being braked, in the hydraulic power mechanism
Under effect of inertia, the first hydraulic fluid port of the hydraulic power mechanism is by the first oil storage valve to the accumulator oil storage；When
When the hydraulic power mechanism starts and works to first direction of motion, the accumulator can pass through the accumulation of energy oil-supply valve
To the second hydraulic fluid port fuel feeding of the hydraulic power mechanism；
When the hydraulic power mechanism to the work of second direction of motion when being braked, in the hydraulic power mechanism
Under effect of inertia, the second hydraulic fluid port of the hydraulic power mechanism is by the second oil storage valve to the accumulator oil storage；When
When the hydraulic power mechanism starts and moves to second direction, the accumulator can be by the accumulation of energy oil-supply valve to institute
State the first hydraulic fluid port fuel feeding of hydraulic power mechanism.
Further, the first oil storage valve and the second oil storage valve are check valve.
It further, further include control unit；Described control unit is connect with the accumulation of energy oil-supply valve；
When the hydraulic power mechanism starts and moves to first direction of motion, described in described control unit control movement
The spool of accumulation of energy oil-supply valve, so that the accumulator can be by the accumulation of energy oil-supply valve to the hydraulic power mechanism
Second hydraulic fluid port fuel feeding；
When the hydraulic power mechanism starts and moves to second direction of motion, described in described control unit control movement
The spool of accumulation of energy oil-supply valve, so that the accumulator can be by the accumulation of energy oil-supply valve to the hydraulic power mechanism
First hydraulic fluid port fuel feeding.
Further, the hydraulic power mechanism is hydraulic motor.
Further, the hydraulic power mechanism is hydraulic pump motor；The hydraulic pump motor and described control unit connect
It connects；After the hydraulic pump motor is switched to on-position by working, described control unit controls the hydraulic pump motor by horse
The working forms reached are switched to the working forms of pump.
It further, further include energy storage pressure sensor；The energy storage pressure sensor is connect with the accumulator,
For detecting the pressure of the accumulator；Described control unit is connect with the energy storage pressure sensor, for according to
The pressure of energy storage pressure sensor controls discharge capacity of the hydraulic pump motor in the working condition of pump, described hydraulic to increase
The output pressure of pump motor.
Further, the present invention also provides a kind of excavator, which includes swing mechanism and provided by the invention
Braking energy-saving hydraulic system；The swing mechanism is connect with the hydraulic power mechanism.
It further, further include main pump and main oil-supply valve；The main oil-supply valve is four-way reversing valve door；The main confession
Two hydraulic fluid ports of oil valve door are connected to the main pump and fuel tank respectively, other two hydraulic fluid port respectively with the hydraulic power mechanism
First hydraulic fluid port and the connection of the second hydraulic fluid port；The main pump and the main oil-supply valve are connect with described control unit；
When the hydraulic power mechanism starts and works to first direction, the mobile main confession of described control unit control
The spool of oil valve door, so that the main pump can be supplied by the main oil-supply valve to the second hydraulic fluid port of the hydraulic power mechanism
Oil；
When the hydraulic power mechanism starts and works to second direction, the mobile main confession of described control unit control
The spool of oil valve door, so that the main pump can be supplied by the main oil-supply valve to the first hydraulic fluid port of the hydraulic power mechanism
Oil.
It further, further include main pump valve；The oil outlet of the main pump passes through the main pump valve and the main fuel feeding
Valve connection；The main pump valve is check valve, and the main pump can be by the main pump valve to the hydraulic activator
Structure fuel feeding.
Braking energy-saving hydraulic system provided by the invention include hydraulic power mechanism, accumulator, the first oil storage valve and
Accumulation of energy oil-supply valve；When hydraulic power mechanism braking, due to the effect of inertia of hydraulic power mechanism, hydraulic power mechanism continues
Movement, so that the oil return line pressure rise of hydraulic power mechanism, at this point, the first oil storage valve is opened, due to hydraulic power mechanism
The pressure of oil return line be greater than the pressure of accumulator, the hydraulic oil of the first oil port of hydraulic power mechanism passes through the first oil storage valve
Door is to accumulator oil storage, to be depressured to oil return line, after oil storage, closes the first oil storage valve.When hydraulic power mechanism opens
When dynamic, accumulation of energy function valve is opened, by the second hydraulic fluid port fuel feeding of accumulator and hydraulic Dong Li mechanism, at this point, due to accumulator
Pressure is greater than the pressure of the second oil port, and the hydraulic oil in accumulator enters the of hydraulic power mechanism by accumulation of energy oil-supply valve
Two hydraulic fluid ports, to realize purpose of the accumulator to hydraulic power mechanism fuel feeding.
Braking energy-saving hydraulic system provided by the invention, the hydraulic oil of oil return line is passed through storage when hydraulic power mechanism is braked
Energy device is stored, and hydraulic power mechanism is passed through in hydraulic power mechanism starting, then by the hydraulic oil in accumulator, to hydraulic
Power mechanism carries out fuel feeding, and the hydraulic oil of oil return line is lost by overflow valve when avoiding braking, avoids the waste of energy,
Meanwhile on startup, hydraulic oil is supplied hydraulic power mechanism again by accumulator, and the conversion of form of energy is not needed during this,
The loss for also avoiding energy in energy conversion process, improves utilization rate.
Detailed description of the invention
The attached drawing for constituting a part of the invention is used to provide further understanding of the present invention, schematic reality of the invention
It applies example and its explanation is used to explain the present invention, do not constitute improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is the structural schematic diagram of braking energy-saving hydraulic system according to an embodiment of the present invention；
Fig. 2 is that the braking energy-saving hydraulic system according to an embodiment of the present invention structure that accumulator carries out oil storage in braking is shown
It is intended to；
Fig. 3 be braking energy-saving hydraulic system according to an embodiment of the present invention on startup accumulator individually to hydraulic activator
The structural schematic diagram of structure fuel feeding；
Fig. 4 be braking energy-saving hydraulic system according to an embodiment of the present invention on startup accumulator and main pump simultaneously to hydraulic
The structural schematic diagram of power mechanism fuel feeding.
In figure:
1- hydraulic power mechanism；2- accumulator；3- the first oil storage valve；
4- the second oil storage valve；5- accumulation of energy oil-supply valve；6- controller；
The main oil-supply valve of 7-；8- main pump valve；9- energy storage pressure sensor；
10- main pump；The first hydraulic fluid port of 11-；The second hydraulic fluid port of 12-；
13- manual switch valve；14- pilot handle；15- swing mechanism；
16- deceleration mechanism；17- guide's first pressure sensor；
18- guide's second pressure sensor；The first oil circuit of 19- guide；The second oil circuit of 20- guide.
Specific embodiment
It should be noted that in the absence of conflict, the feature in embodiment and embodiment in the present invention can phase
Mutually combination.The present invention will be described in detail below with reference to the accompanying drawings and embodiments.
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.
Fig. 1 is the structural schematic diagram of braking energy-saving hydraulic system according to an embodiment of the present invention；Fig. 2 is real according to the present invention
Apply the structural schematic diagram of braking energy-saving hydraulic system accumulator progress oil storage in braking of example；Fig. 3 is to implement according to the present invention
Example braking energy-saving hydraulic system on startup accumulator individually to the structural schematic diagram of hydraulic power mechanism fuel feeding；Fig. 4 is root
According to the embodiment of the present invention braking energy-saving hydraulic system on startup accumulator and main pump simultaneously to hydraulic power mechanism fuel feeding
Structural schematic diagram；As shown in Figures 1 to 4, the present invention provides a kind of braking energy-saving hydraulic system, the braking energy-saving hydraulic system packet
It includes: hydraulic power mechanism 1, accumulator 2, the first oil storage valve 3 and accumulation of energy oil-supply valve 5；First oil of hydraulic power mechanism 1
Mouth 11 is connect by the first oil storage valve 3 with accumulator 2；Accumulator 2 also passes through accumulation of energy oil-supply valve 5 and hydraulic power mechanism 1
The second hydraulic fluid port 12 connection；When hydraulic power mechanism 1 is braked, under the effect of inertia of hydraulic power mechanism 1, hydraulic activator
First hydraulic fluid port 11 of structure 1 passes through the first oil storage valve 3 to 2 oil storage of accumulator；When hydraulic power mechanism 1 starts, 2 energy of accumulator
Enough pass through second hydraulic fluid port 12 fuel feeding of the accumulation of energy oil-supply valve 5 to hydraulic power mechanism 1.
Braking energy-saving hydraulic system provided in an embodiment of the present invention includes hydraulic power mechanism 1, accumulator 2, the first oil storage
Valve 3 and accumulation of energy oil-supply valve 5；It is hydraulic due to the effect of inertia of hydraulic power mechanism 1 when hydraulic power mechanism 1 is braked
Power mechanism 1 continues to move, so that the oil return line pressure rise of hydraulic power mechanism 1, at this point, the first oil storage valve 3 is opened, by
It is greater than the pressure of accumulator 2 in the pressure of the oil return line of hydraulic power mechanism 1, at the first hydraulic fluid port 11 of hydraulic power mechanism 1
Hydraulic oil, to 2 oil storage of accumulator, to be depressured to oil return line, after oil storage, closes the first oil storage by the first oil storage valve 3
Valve 3.When hydraulic power mechanism 1 starts, accumulation of energy function valve is opened, by the second oil of accumulator 2 and hydraulic power mechanism
12 fuel feeding of mouth, at this point, the hydraulic oil in accumulator 2 is by storing since the pressure of accumulator 2 is greater than the pressure at the second hydraulic fluid port 12
Energy oil-supply valve 5 enters the second hydraulic fluid port 12 of hydraulic power mechanism 1, to realize accumulator 2 to 1 fuel feeding of hydraulic power mechanism
Purpose.
Braking energy-saving hydraulic system provided in an embodiment of the present invention, oil return line is hydraulic when hydraulic power mechanism 1 is braked
Oil is passed through accumulator 2 and is stored, and is passed through hydraulic power when hydraulic power mechanism 1 starts, then by the hydraulic oil in accumulator 2
Mechanism 1 carries out fuel feeding to hydraulic power mechanism 1, and the hydraulic oil of oil return line is lost by overflow valve when avoiding braking, avoids making
At the waste of energy, meanwhile, on startup, hydraulic oil is supplied hydraulic power mechanism 1 again by accumulator 2, this is not needed in the process
The conversion of form of energy also avoids the loss of energy in energy conversion process, improves utilization rate.
Wherein, the first hydraulic fluid port 11 of hydraulic power mechanism 1 refers to that its oil outlet during exercise, the second hydraulic fluid port 12 refer to it
Oil inlet during exercise.Certainly, since the direction of motion of hydraulic power mechanism 1 is different, the oil inlet of hydraulic power mechanism 1 and
Oil outlet does not uniquely determine, and the first hydraulic fluid port 11 and the second hydraulic fluid port 12 refer to practical oil inlet and oil outlet under a certain motion state.
First hydraulic fluid port 11 and the second hydraulic fluid port 12 are at B and A two in figure.
Hydraulic power mechanism 1 can be the mechanisms such as hydraulic motor, hydraulic cylinder.
Further, manual switch valve 13 is connect with accumulator 2, in the inspection of accumulator 2 or failure, release to store
Energy 2 high pressure liquid pressure oil of device, improves the safety of checking process.
As shown in Figures 1 to 4, on the basis of the above embodiments, further, which further includes
Second oil storage valve 4；Second hydraulic fluid port 12 of hydraulic power mechanism 1 is connect by the second oil storage valve 4 with accumulator 2；Accumulation of energy supplies
Oil valve door 5 is four-way reversing valve；Two hydraulic fluid ports of accumulation of energy oil-supply valve 5 are connected to accumulator 2 and fuel tank respectively, other two oil
Mouth is connected to the first hydraulic fluid port 11 of hydraulic power mechanism 1 and the second hydraulic fluid port 12 respectively；When hydraulic power mechanism 1 is moved to first
When direction work is braked, under the effect of inertia of hydraulic power mechanism 1, the first hydraulic fluid port 11 of hydraulic power mechanism 1 passes through
First oil storage valve 3 is to 2 oil storage of accumulator；When hydraulic power mechanism 1 starts and works to first direction of motion, accumulator 2
It can be by accumulation of energy oil-supply valve 5 to 12 fuel feeding of the second hydraulic fluid port of hydraulic power mechanism 1；When hydraulic power mechanism 1 is to second
When direction of motion work is braked, under the effect of inertia of hydraulic power mechanism 1, the second hydraulic fluid port 12 of hydraulic power mechanism 1
By the second oil storage valve 4 to 2 oil storage of accumulator；When hydraulic power mechanism 1 starts and moves to second direction, accumulator 2
It can be by accumulation of energy oil-supply valve 5 to 11 fuel feeding of the first hydraulic fluid port of hydraulic power mechanism 1.
Wherein, when hydraulic power mechanism 1 is motor, first direction and second direction are left-hand rotation direction and right-hand rotation side respectively
To.When hydraulic power mechanism 1 is hydraulic cylinder, first direction and second direction are stretching and the withdrawal side of piston rod respectively
To.
In the present embodiment, four-way reversing valve is set by accumulation of energy oil-supply valve 5, when hydraulic power mechanism 1 is moved to first
Direction work, and when being braked, under this state, the first hydraulic fluid port 11 is oil return opening, and the second hydraulic fluid port 12 is oil inlet, the first oil storage
Valve 3 is opened, and the second oil storage valve 4 is closed, and the first hydraulic fluid port 11 of hydraulic power mechanism 1 passes through the first oil storage valve 3 to accumulation of energy
2 oil storage of device.When hydraulic power mechanism 1 starts and works to first direction of motion, four-way is adjusted by the second oil circuit of guide 20
The spool position of reversal valve, so that the hydraulic oil in accumulator 2 after four-way reversing valve, flow to the of hydraulic power mechanism 1
Two hydraulic fluid ports 12 flow out to four-way reversing valve from the first hydraulic fluid port 11, finally flow back into fuel tank.
Correspondingly, when hydraulic power mechanism 1 works to second direction of motion, and is braked, under this state, the second oil
Mouth 12 is oil return opening, and the first hydraulic fluid port 11 is oil inlet, and in braking, in the effect of inertia, hydraulic power mechanism is still to the second fortune
Dynamic direction movement, at this point, the second oil storage valve 4 is opened, the first oil storage valve 3 is closed, the second hydraulic fluid port 12 of hydraulic power mechanism 1
Pass through to 2 oil storage of accumulator when the starting of hydraulic power mechanism 1 and to when the work of second direction of motion by the second oil storage valve 4
The first oil circuit of guide 19 adjusts the spool position of four-way reversing valve, so that the hydraulic oil in accumulator 2 is after four-way reversing valve,
It is flow to the first hydraulic fluid port 11 of hydraulic power mechanism 1, four-way reversing valve is flowed out to from the second hydraulic fluid port 12, finally flows back into fuel tank.
It is of course also possible to dynamic in 1 first direction work schedule of hydraulic power mechanism, work is moved to second direction when starting
Make, principle is same as above.
As shown in Figures 1 to 4, on the basis of the above embodiments, further, the first oil storage valve 3 and the second oil storage
Valve 4 is check valve.
In the present embodiment, the first oil storage valve 3 and the second oil storage valve 4 are disposed as check valve, when the first hydraulic fluid port 11
When being oil outlet in braking, the hydraulic oil at the first hydraulic fluid port 11 enters accumulator 2 by the first oil storage valve 3, at this point, due to
Second oil storage valve 4 is check valve, only the second hydraulic fluid port 12 is allowed to flow to the direction of accumulator 2, and the hydraulic oil in accumulator 2 is not
The second hydraulic fluid port 12 can be flowed to by the second oil storage valve 4, therefore, at this point, hydraulic oil at only the first hydraulic fluid port 11 is to accumulator 2
Fuel feeding.Correspondingly, when the second hydraulic fluid port 12 is oil outlet when braking, the hydraulic oil at the second hydraulic fluid port 12 passes through the second oil storage valve
Door 4 enters accumulator 2, at this point, only allowing the first hydraulic fluid port 11 to the direction of accumulator 2 since the first oil storage valve 3 is check valve
It flows, the hydraulic oil in accumulator 2 cannot flow to the first hydraulic fluid port 11 by the first oil storage valve 3, therefore, at this point, only second
Hydraulic oil at hydraulic fluid port 12 is to 2 fuel feeding of accumulator.
In the present embodiment, the first oil storage valve 3 and the second oil storage valve 4 are check valve, realize the first oil storage valve 3
With the flow direction of 4 volitional check hydraulic oil of the second oil storage valve, the high pressure liquid pressure oil for oil circuit, which unidirectionally rushes oil to accumulator 2, to be made
With, prevent under the premise of inactive carry out energy release, cause the malfunction of machine.
As shown in Figures 1 to 4, on the basis of the above embodiments, further, which further includes
Control unit；Control unit is connect with accumulation of energy oil-supply valve 5；When hydraulic power mechanism 1 starts and moves to first direction of motion
When, control unit controls the spool of mobile storage oil-supply valve 5, so that accumulator 2 can be by accumulation of energy oil-supply valve 5 to hydraulic
12 fuel feeding of the second hydraulic fluid port of power mechanism 1；When hydraulic power mechanism 1 starts and moves to second direction of motion, control unit
The spool for controlling mobile storage oil-supply valve 5 is mobile, so that accumulator 2 can be by accumulation of energy oil-supply valve 5 to hydraulic activator
11 fuel feeding of the first hydraulic fluid port of structure 1.In the present embodiment, since 1 direction of motion of hydraulic power mechanism is different, the first hydraulic fluid port 11 and second
Hydraulic fluid port 12 is the situation difference of oil inlet or oil outlet, and the spool of accumulation of energy oil-supply valve 5 is automatically controlled by controller 6, so that
After the hydraulic oil of accumulator 2 flows through accumulation of energy oil-supply valve 5, oil inlet is flowed into always, that is, hydraulic power mechanism 1 is to first party
To when movement, the second hydraulic fluid port 12 is oil inlet, after the hydraulic oil of accumulator 2 flows through accumulation of energy oil-supply valve 5, flows into the second hydraulic fluid port
12.When hydraulic power mechanism 1 is moved to second direction, the first hydraulic fluid port 11 is oil inlet, and the hydraulic oil of accumulator 2 flows through accumulation of energy confession
After oil valve door 5, the first hydraulic fluid port 11 is flowed into.
In the present embodiment, cooperated by controller 6 and accumulation of energy oil-supply valve 5, it can be achieved that hydraulic power mechanism 1 on startup
When moving to different directions, the hydraulic oil in accumulator 2 is always to its oil inlet fuel feeding, high degree of automation.As shown in Figure 1 to Figure 4
Shown, on the basis of the above embodiments, further, hydraulic power mechanism 1 is hydraulic motor.
In the present embodiment, above-mentioned first direction is left gyratory directions, at this point, the first hydraulic fluid port 11 is fuel-displaced in braking
Mouthful, the second hydraulic fluid port 12 is oil inlet.Second direction is right-hand rotation direction, at this point, the second hydraulic fluid port 12 is oil outlet in braking,
First hydraulic fluid port 11 is oil inlet.Principle is same as above.
On the basis of the above embodiments, further, hydraulic power mechanism 1 is hydraulic pump motor；Hydraulic pump motor with
Control unit connection；After hydraulic pump motor is switched to on-position by working, control unit controls hydraulic pump motor by motor
Working forms be switched to the working forms of pump.
Wherein, hydraulic pump motor refers to the form work that can be switched to pump, also can be switched to the machine of the form work of motor
Structure.
In the present embodiment, hydraulic power mechanism 1 is hydraulic pump motor, when hydraulic power mechanism 1 is braked, control unit control
Hydraulic pump motor processed is switched to the working forms of pump by the working forms of motor.For example, the work in a first direction of hydraulic power mechanism 1
When making and braking, the first hydraulic fluid port 11 is oil outlet, and the second hydraulic fluid port 12 is oil inlet, in hydraulic pump motor by the working forms of motor
Before being switched to the working forms of pump, the hydraulic oil at the first hydraulic fluid port 11 passes through the first oil storage valve 3 to 2 oil storage of accumulator.In liquid
After press pump motor is switched to the working forms of pump by the working forms of motor, hydraulic pump motor passes through first with the working forms pumped
Oil storage valve 3 is stored by accumulator 2 so that the hydraulic oil of oil return line is more as far as possible to 2 oil storage of accumulator, increases accumulation of energy
The oil reserve of device 2 improves the utilization rate of energy.When hydraulic power mechanism 1 starts, by hydraulic pump motor by the work shape that pumps
Formula is switched to the working forms of motor.
Wherein, accumulator 2 is set designed for directly storage rotary braking hydraulic oil, initial inflated gas pressure and capacity
Meter should meet revolution pump motor and recycle high pressure liquid pressure oil during a rotary braking, and before not influencing rotational speed
It puts.Meanwhile the pulse of hydraulic circuit in turning course can be absorbed in the design of accumulator 2, increases the stationarity of revolution movement.
As shown in Figures 1 to 4, on the basis of the above embodiments, further, which further includes
Energy storage pressure sensor 9；Energy storage pressure sensor 9 is connect with accumulator 2, for detecting the pressure of accumulator 2；Control is single
Member is connect with energy storage pressure sensor 9, for the force control hydraulic pressure pump motor according to energy storage pressure sensor in pump
Discharge capacity when working condition, to increase the output pressure of hydraulic pump motor.
In the present embodiment, when hydraulic power mechanism 1 is braked, and hydraulic pump motor is switched to by the working forms of motor
After the working forms of pump, due to oil inlet always in accumulator 2, the pressure of accumulator 2 is gradually increased, and control unit is passed according to pressure
The pressure value for the accumulator 2 that sensor detects, adjusts the discharge capacity of hydraulic pump motor, to increase the output pressure of hydraulic pump motor
Power, so that the pressure of hydraulic pump motor is higher than the pressure of accumulator 2, so as to make the hydraulic oil inflow as much as possible of oil return line
Accumulator 2 is realized to the maximum extent to 2 fuel feeding of accumulator, reduces the loss of hydraulic energy.
The above braking energy-saving hydraulic system structure provided by the invention is simple, control convenience, can be on prevailing system directly
It is reequiped, realizability and reliability with higher.
Further, control unit includes controller 6, hydraulic control portion, first pressure sensor, second pressure sensing
Device, the first oil circuit of guide 19 and the second oil circuit of guide 20.The controller and 17 signal of guide's first pressure sensor connect
It connects, the controller is connect with 18 signal of guide's second pressure sensor, and the controller and the energy storage pressure pass
Sensor signal connection, the controller are connect with main pump signal, and the controller is connect with hydraulic power mechanism signal.
When the pilot handle opens first oil circuit of guide 19, the controller is by detecting the guide first
19 signal of oil circuit is by judging that the hydraulic power mechanism is in starting state, pressure power mechanism described in liquid being adjusted to without to having
Motor；The controller detects the energy storage pressure sensor signal by inspection, constantly adjusts the discharge capacity of the main pump
Hydraulic oil is provided to the hydraulic power mechanism.
When the pilot handle opens second oil circuit of guide 20, the controller is by detecting the guide second
20 signal of oil circuit is by judging that the hydraulic power mechanism is in starting state, pressure power mechanism described in liquid being adjusted to without to having
Motor；The controller by detecting the energy storage pressure sensor signal, constantly adjust the discharge capacity of the main pump to
The hydraulic power mechanism provides hydraulic oil.
When the pilot handle disconnects first oil circuit of guide 19, the controller is by detecting the guide first
19 signal of oil circuit judges that the hydraulic power mechanism is in on-position, by pressure power institutional adjustment described in liquid by having to nothing
For motor；The controller detects the energy storage pressure sensor signal by inspection, constantly adjusts the hydraulic power
The discharge capacity of mechanism provides hydraulic oil to the accumulator.
When the pilot handle disconnects second oil circuit of guide 20, the controller is by detecting the guide second
20 signal of oil circuit is judged that the hydraulic power mechanism is in on-position, pressure power mechanism described in liquid is adjusted to by having to nothing
Motor；The controller detects the energy storage pressure sensor signal by inspection, constantly adjusts the hydraulic activator
The discharge capacity of structure provides hydraulic oil to the accumulator.
At the same time, the hydraulic power mechanism described in detecting when the controller is in on-position, and at this time without it
When he acts, the controller controls the row angle time-delay reset of the main pump, and the main pump is to the main valve fuel feeding, so that hydraulic
Oil can be by position oil return in the main valve, to provide necessary repairing to the hydraulic power mechanism.
On the basis of the above embodiments, further, the present invention also provides a kind of excavator, which includes revolution
Mechanism 15 and braking energy-saving hydraulic system provided by the invention；The swing mechanism 15 is connect with the hydraulic power mechanism 1.
The principle of braking energy-saving hydraulic system is same as above, and details are not described herein.
Wherein, swing mechanism 15 is connect by deceleration mechanism 16 with hydraulic power mechanism 1.In braking, due to turn-around machine
The inertia of structure 15 makes hydraulic power mechanism 1 continue to move under the action of inertia, so that low pressure occurs in oil inlet, passes through main valve
The oil return of oil return line carries out repairing.
As shown in Figures 1 to 4, on the basis of the above embodiments, further, which further includes main pump 10 and master
Oil-supply valve 7；Main oil-supply valve 7 is four-way reversing valve；Two hydraulic fluid ports of main oil-supply valve 7 connect with main pump 10 and fuel tank respectively
Logical, other two hydraulic fluid port is connected to the first hydraulic fluid port 11 of hydraulic power mechanism 1 and the second hydraulic fluid port 12 respectively；Main pump 10 and main fuel feeding
Valve 7 is connect with control unit；When hydraulic power mechanism 1 starts and works to first direction, control unit control movement
The spool of main oil-supply valve 7, so that main pump 10 can be supplied by main oil-supply valve 7 to the second hydraulic fluid port 12 of hydraulic power mechanism 1
Oil；When hydraulic power mechanism 1 starts and works to second direction, the spool of the mobile main oil-supply valve 7 of control unit control, with
Enable first hydraulic fluid port 11 fuel feeding of the main pump 10 by main oil-supply valve 7 to hydraulic power mechanism 1.
Guide's first pressure sensor 17, guide's second sensor 18 are connect with controller 6；When the first oil circuit of guide 19
It opens, the starting of hydraulic power mechanism 1 simultaneously works to second direction, and master controller 6 passes through detection guide's first pressure sensor 17
Signal, control main pump 10 discharge capacity pass through first hydraulic fluid port 11 fuel feeding of the main oil-supply valve 7 to hydraulic power mechanism 1；Work as guide
Second oil circuit 20 is opened, and the starting of hydraulic power mechanism 1 simultaneously works to first direction, and master controller 6 is pressed by detection guide second
The discharge capacity of the signal of force snesor 18, control main pump 10 is supplied by main oil-supply valve 7 to the second hydraulic fluid port 12 of hydraulic power mechanism 1
Oil.
In the present embodiment, when hydraulic power mechanism 1 starts and works to first direction, the first hydraulic fluid port 11 is oil outlet,
Second hydraulic fluid port 12 is oil inlet, and the spool of the mobile main oil-supply valve 7 of the control of controller 6 enables main pump 10 by main fuel feeding
Second hydraulic fluid port, 12 fuel feeding, the hydraulic oil of the first hydraulic fluid port 11 outflow are flowed back to fuel tank by main four-way reversing valve by valve 7.Correspondingly,
When hydraulic power mechanism 1 starts and works to second direction, the second hydraulic fluid port 12 is oil outlet, and the first hydraulic fluid port 11 is oil inlet,
The spool of the mobile main oil-supply valve 7 of the control of controller 6, enables main pump 10 to supply the first hydraulic fluid port 11 by main oil-supply valve 7
The hydraulic oil of oil, the outflow of the second hydraulic fluid port 12 flows back to fuel tank by main oil-supply valve 7.
Specifically, when hydraulic power mechanism 1 start and to first direction work when, the first hydraulic fluid port 11 be oil outlet, second
Hydraulic fluid port 12 is oil inlet, and the spool of main oil-supply valve 7 passes through the control of the second oil circuit of guide 20, so that the hydraulic oil of main pump 10 passes through
Main oil-supply valve 7 is crossed to 12 fuel feeding of the second hydraulic fluid port, the hydraulic oil of the first hydraulic fluid port 11 outflow passes through main 7 spool flow back fluid of oil-supply valve
Pressure oil case.Correspondingly, when hydraulic power mechanism 1 starts and works to second direction, the second hydraulic fluid port 12 is oil outlet, the first oil
Mouth 11 is oil inlet, and the spool of main oil-supply valve 7 passes through the control of the first oil circuit of guide 19, so that the hydraulic oil of main pump 10 passes through
Main oil-supply valve 7 flows back to hydraulic to 11 fuel feeding of the first hydraulic fluid port, the hydraulic oil of the second hydraulic fluid port 12 outflow by main 7 spool of oil-supply valve
Fuel tank.By the pressure of detection the first oil circuit of guide 19, the second oil circuit of guide 20, the row angle of adjust automatically main pump 10 is realized flat
The optimization of steady fuel feeding.
In the present embodiment, the cooperation of controller 6 and main oil-supply valve 7 can make main pump 10 always by main oil-supply valve 7 to
The oil inlet fuel feeding of hydraulic power mechanism 1 improves automation, is easy to use.
Wherein, main oil-supply valve 7 is the valve that rotating part is controlled in excavator main valve.
As shown in Figures 1 to 4, on the basis of the above embodiments, further, which further includes main pump valve 8；
The oil outlet of main pump 10 is connect by main pump valve 8 with main oil-supply valve；Main pump valve 8 is check valve, and main pump 10 can lead to
Main pump valve 8 is crossed to 1 fuel feeding of hydraulic power mechanism.
In the present embodiment, check valve is set between main oil-supply valve and main pump 10, when hydraulic power mechanism 1 starts,
Since accumulation of energy oil-supply valve 5 and main oil-supply valve are in an open state, accumulator 2 and main pump 10 with hydraulic power mechanism 1
Oil inlet connection, hydraulic oil in accumulator 2 to 1 fuel feeding of hydraulic power mechanism, the hydraulic oil of main pump 10 by main pump valve 8 to
1 fuel feeding of hydraulic power mechanism.At this point, the hydraulic oil due to 8 permission main pumps 10 of main pump valve on 1 direction of hydraulic power mechanism
Flowing, so that the hydraulic oil in accumulator 2 cannot pass through main pump valve 8 and flow to main pump 10.When the pressure of accumulator 2 is higher than main pump
When the system pressure of 10 offers, cutting accumulator 2 and main pump 10 provide working connection, avoid the high pressure liquid pressure oil of accumulator 2 to master
Oil circuit interferes, and influences other movements in parallel therewith.
In addition, the high pressure liquid pressure oil pulse that accumulator 2 can absorb the starting of hydraulic power mechanism 1 and revolution midway is formed, mentions
The high stationarity of revolution movement, meanwhile, reduce the overflow of the high pressure liquid pressure oil generated because starting and turning round midway by pulse, drop
The low unnecessary waste of the energy in turning course.
Further, when hydraulic power mechanism 1 starts, accumulator oil-supply valve 5 and master are opened in the control of pilot handle 14
Oil-supply valve 7 so that both can simultaneously to hydraulic power mechanism 1 oil inlet fuel feeding.Due to the pressure of main pump 10 at the beginning
Power is lower, from accumulator 2 individually to 1 fuel feeding of hydraulic power mechanism, when 10 pressure of main pump is gradually increased to certain numerical value, and main pump
10 also start to 1 fuel feeding of hydraulic power mechanism, at this point, accumulator 2 and hydraulic power mechanism 1 collaborate, while to hydraulic activator
1 fuel feeding of structure, the common starting for driving hydraulic power mechanism 1, reduces the torque that main pump 10 is supplied to hydraulic power mechanism 1, subtracts
Energy consumption is lacked.
Further, the pressure for the accumulator 2 that controller 6 is detected according to energy storage pressure sensor 9 judges accumulator 2
Fuel delivery, adjust 10 discharge capacity of main pump so that the fuel delivery of the two reach hydraulic power mechanism 1 it is specified need oil mass.
As shown in Figures 1 to 4, on the basis of the above embodiments, further, which includes pilot handle 14；
Pilot handle 14 is connect with guide's first pressure sensor 17, guide's second pressure sensor 18；When pilot handle 14 is in system
When dynamic state, controller 6 passes through the pressure signal of detection guide's first pressure sensor 17, guide's second pressure sensor 18,
Control hydraulic power mechanism 1 is worked in the form of pump, and controller 6 controls hydraulic power by detection energy storage pressure sensor 9
The discharge capacity of mechanism 1；When pilot handle 14 is in the open state, controller 6 passes through detection guide's first pressure sensor 17, elder generation
The pressure signal of second pressure sensor 18 is led, control hydraulic power mechanism 1 is worked in the form of motor, and controller 6 passes through inspection
Energy storage pressure sensor 9 is surveyed, the discharge capacity of main pump 10 is controlled.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (9)
1. a kind of braking energy-saving hydraulic system characterized by comprising hydraulic power mechanism, accumulator, the first oil storage valve,
Control unit, energy storage pressure sensor and accumulation of energy oil-supply valve；
First hydraulic fluid port of the hydraulic power mechanism is connect by the first oil storage valve with the accumulator；The accumulator
Also it is connect by the accumulation of energy oil-supply valve with the second hydraulic fluid port of the hydraulic power mechanism；
When hydraulic power mechanism braking, under the effect of inertia of the hydraulic power mechanism, the hydraulic power mechanism
The first hydraulic fluid port by the first oil storage valve to the accumulator oil storage；It is described when hydraulic power mechanism starting
Accumulator can be by the accumulation of energy oil-supply valve to the second hydraulic fluid port fuel feeding of the hydraulic power mechanism；
The hydraulic power mechanism is hydraulic pump motor, and the energy storage pressure sensor is connect with the accumulator, for examining
Survey the pressure of the accumulator；Described control unit is connect with the energy storage pressure sensor, for according to the accumulator
The pressure of pressure sensor controls discharge capacity of the hydraulic pump motor in the working condition of pump, to increase the hydraulic pump motor
Output pressure.
2. braking energy-saving hydraulic system according to claim 1, which is characterized in that further include the second oil storage valve；
Second hydraulic fluid port of the hydraulic power mechanism is connect by the second oil storage valve with the accumulator；
The accumulation of energy oil-supply valve is four-way reversing valve；
Two hydraulic fluid ports of the accumulation of energy oil-supply valve are connected to the accumulator and fuel tank respectively, other two hydraulic fluid port respectively with institute
State the first hydraulic fluid port and the connection of the second hydraulic fluid port of hydraulic power mechanism；
When the hydraulic power mechanism to the work of first direction of motion when being braked, in the inertia of the hydraulic power mechanism
Under effect, the first hydraulic fluid port of the hydraulic power mechanism is by the first oil storage valve to the accumulator oil storage；When described
Hydraulic power mechanism starting and when working to first direction of motion, the accumulator can be by the accumulation of energy oil-supply valve to institute
State the second hydraulic fluid port fuel feeding of hydraulic power mechanism；
When the hydraulic power mechanism to the work of second direction of motion when being braked, in the inertia of the hydraulic power mechanism
Under effect, the second hydraulic fluid port of the hydraulic power mechanism is by the second oil storage valve to the accumulator oil storage；When described
Hydraulic power mechanism starts and when moving to second direction, and the accumulator can be by the accumulation of energy oil-supply valve to the liquid
First hydraulic fluid port fuel feeding of pressure power mechanism.
3. braking energy-saving hydraulic system according to claim 2, which is characterized in that the first oil storage valve and described the
Two oil storage valves are check valve.
4. braking energy-saving hydraulic system according to claim 2, which is characterized in that
When the hydraulic power mechanism starts and moves to first direction of motion, the mobile accumulation of energy of described control unit control
The spool of oil-supply valve, so that the accumulator can be by the accumulation of energy oil-supply valve to the second of the hydraulic power mechanism
Hydraulic fluid port fuel feeding；
When the hydraulic power mechanism starts and moves to second direction of motion, the mobile accumulation of energy of described control unit control
The spool of oil-supply valve, so that the accumulator can be by the accumulation of energy oil-supply valve to the first of the hydraulic power mechanism
Hydraulic fluid port fuel feeding.
5. braking energy-saving hydraulic system according to claim 1-4, which is characterized in that the hydraulic activator
Structure is hydraulic motor.
6. braking energy-saving hydraulic system according to claim 4, which is characterized in that the hydraulic pump motor and the control
Unit connection；
After the hydraulic pump motor is switched to on-position by working, described control unit controls the hydraulic pump motor by horse
The working forms reached are switched to the working forms of pump.
7. a kind of excavator, which is characterized in that including swing mechanism and brake section as claimed in any one of claims 1 to 6
It can hydraulic system；
The swing mechanism is connect with the hydraulic power mechanism.
8. excavator according to claim 7, which is characterized in that further include main pump and main oil-supply valve；The main fuel feeding
Valve is four-way reversing valve door；
Two hydraulic fluid ports of the main oil-supply valve are connected to the main pump and fuel tank respectively, other two hydraulic fluid port respectively with the liquid
First hydraulic fluid port of pressure power mechanism and the connection of the second hydraulic fluid port；
The main pump and the main oil-supply valve are connect with control unit；
When the hydraulic power mechanism starts and works to first direction, the mobile main delivery valve of described control unit control
The spool of door, so that the main pump can be by the main oil-supply valve to the second hydraulic fluid port fuel feeding of the hydraulic power mechanism；
When the hydraulic power mechanism starts and works to second direction, the mobile main delivery valve of described control unit control
The spool of door, so that the main pump can be by the main oil-supply valve to the first hydraulic fluid port fuel feeding of the hydraulic power mechanism.
9. excavator according to claim 8, which is characterized in that further include main pump valve；
The oil outlet of the main pump is connect by the main pump valve with the main oil-supply valve；
The main pump valve is check valve, and the main pump can be supplied by the main pump valve to the hydraulic power mechanism
Oil.
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| CN201710935690.3A CN107939752B (en) | 2017-10-10 | 2017-10-10 | Braking energy-saving hydraulic system and excavator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710935690.3A CN107939752B (en) | 2017-10-10 | 2017-10-10 | Braking energy-saving hydraulic system and excavator |
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| CN107939752B true CN107939752B (en) | 2019-11-26 |
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| CN105508314A (en) * | 2016-01-31 | 2016-04-20 | 太原理工大学 | Crusher main motor hydraulic control circuit and control method thereof |
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| US6971463B2 (en) * | 2002-12-23 | 2005-12-06 | Cnh America Llc | Energy recovery system for work vehicle including hydraulic drive circuit and method of recovering energy |
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| JP6601835B2 (en) * | 2015-04-21 | 2019-11-06 | キャタピラー エス エー アール エル | Fluid pressure circuit and work machine |
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| CN2072546U (en) * | 1990-07-10 | 1991-03-06 | 李建启 | Hydraulic shovel slewing system with reclaiming brake energy |
| CN201649155U (en) * | 2010-02-05 | 2010-11-24 | 浙江大学 | Hydraulic Excavator Rotary Deceleration Braking Energy Recovery System |
| CN102493517A (en) * | 2011-12-07 | 2012-06-13 | 哈尔滨工业大学 | Slewing system for hybrid hydraulic excavator and driving and braking method for slewing system |
| CN103470557A (en) * | 2013-09-05 | 2013-12-25 | 南京工业大学 | Hydraulic rotary braking energy-saving control system |
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