CN201896799U - Wheel crane and hydraulic control system thereof and pump/motor control loop thereof - Google Patents
Wheel crane and hydraulic control system thereof and pump/motor control loop thereof Download PDFInfo
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- CN201896799U CN201896799U CN2010206592344U CN201020659234U CN201896799U CN 201896799 U CN201896799 U CN 201896799U CN 2010206592344 U CN2010206592344 U CN 2010206592344U CN 201020659234 U CN201020659234 U CN 201020659234U CN 201896799 U CN201896799 U CN 201896799U
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Abstract
The utility model discloses a pump/motor control loop, which comprises a pump/motor fixedly connected with a corresponding component to be driven, a power pump for driving the pump/motor, and a first energy accumulator and a second energy accumulator which are matched for use; the first energy accumulator is communicated with an oil outlet of the pump/motor in pump operation mode; the second energy accumulator is communicated with an oil inlet of the pump/motor in pump operation mode; an oil outlet of the power pump is communicated with an oil inlet of the pump/motor in motor operation mode; and an oil outlet of the pump/motor in motor operation mode is communicated with an oil inlet of the power pump. The pump/motor control loop can effectively improve the energy utilization efficiency and the energy-saving effect. The utility model also provides a hydraulic control system comprising the pump/motor control loop and a wheel crane comprising the hydraulic control system. The hydraulic control system can effectively reduce the energy consumption of the wheel crane and the cost of energy recovery.
Description
Technical field
The utility model relates to Hydraulic Field, particularly relates to a kind of pump/motor control loop and the wheeled crane hydraulic control system that comprises above-mentioned pump/motor control loop.In addition, the utility model also relates to a kind of wheeled crane that comprises above-mentioned hydraulic control system.
Background technique
In today that energy worsening shortages, environmental pollution increasingly sharpen, the novel energy-conserving engineering machinery has become numerous designers' main research object.For an engineering machinery manufacturing enterprise, research and development novel energy-conserving engineering machinery not only has the environmental sanitation consciousness of prediction, and can increase the competitive ability of enterprise product, strengthens the innovation ability of enterprise, for company brings new interests growth point.
With the wheeled crane is example, and the wheeled crane hydraulic system is divided into the two-part of getting on the bus and get off at present, has separately independently hydraulic driving system so general middle large-tonnage wheeled crane is got on the bus and got off.Following vehicle hydraulic system is mainly used in functions such as commutation, braking or oleo-pneumatic suspension, and the driving of vehicle chassis realizes by mechanical transmission down; Last vehicle hydraulic system is mainly used in the exercises of control hoist, for example hoists, revolution, luffing, flexible and other auxiliary operations etc.
What following vehicle chassis adopted is automobile chassis, has the shortcoming of a lot of automobile chassises, for example is difficult for realizing that stepless change, serious, the high-power motor that needs of exhaust emissions provide very big power; Also there are problems such as energy loss is big, system's heating is many in last vehicle hydraulic system.
In order to save energy, a kind of electricity mixed power technology is arranged in the prior art, the wheeled crane of the little tonnage of part has adopted this energy recovery mode at present.The electricity mixed power technology is meant on the basis of normal motor vehicle drive system down, has increased by a cover assistant drive system again, and this system is made up of storage battery, motor/generator and transmission device.During the wheeled crane cruising, storage battery is as power source, and drive motor drives transmission device work, to drive the wheel of wheeled crane; During the wheeled crane braking, wheel transmits reversal of stress to transmission device, motor is with the pattern work of generator at this moment, in storage battery, charge, reclaim the braking energy of vehicle, the form of braking energy with electric energy stored, auxiliary driving force is provided when drive next time, reach energy-conservation effect.
Though the electricity mixed power technology can realize recovery, the reduction environmental pollution of energy, also has following shortcoming:
1., storage battery costs an arm and a leg;
2., accumulator cell charging and discharging efficiency is low, be difficult to satisfy fast braking energy and reclaim characteristic;
3., storage battery is lower working life, the user cost height;
4., for engineering machinery, the driving power that electricity mixed power provides is less, can not satisfy the powerful demand of engineering machinery, causes the electricity mixed power technology to be difficult to be applied in the engineering machinery of maximization, its Applicable scope is very little.
In addition, traditional hoisting system is realized the adjusting of rate of descent by the openings of sizes of control equilibrium valve when the elevator lift heavy descends, and weight potential energy mainly consumes with the form of throttling heating, and therefore, traditional elevator hydraulic system possesses following deficiency:
1., throttling control is easy to cause system's heating;
2., equilibrium valve is easy to cause elevator to descend when opening steadily to produce shake, lift heavy stability is difficult to guarantee.
Therefore, how saving the energy consumption of wheeled crane, and reduce the cost of energy recovery on this basis, is the present technical issues that need to address of those skilled in the art.
The model utility content
The purpose of this utility model provides a kind of pump/motor control loop and comprises the wheeled crane hydraulic control system of above-mentioned pump/motor control loop, this hydraulic control system can effectively reduce the energy consumption of wheeled crane, reduce the cost of energy recovery simultaneously, and improve the stability of hoisting system on this basis.Another purpose of the present utility model provides a kind of wheeled crane that comprises above-mentioned hydraulic control system, and its Economy is improved.
For realizing above-mentioned model utility purpose, the utility model provides a kind of pump/motor control loop, comprises the pump/motor of fixedlying connected with corresponding parts to be driven, the kinetic pump that drives described pump/motor, and first accumulator that is used and second accumulator; Described first accumulator is communicated with the oil outlet of the described pump/motor that is in the pump work pattern, and described second accumulator is communicated with the filler opening of the described pump/motor that is in the pump work pattern; The oil outlet of described kinetic pump is communicated with the filler opening of the described pump/motor that is in the motor operations pattern, and the oil outlet that is in the described pump/motor of motor operations pattern is communicated with the filler opening of described kinetic pump.
Preferably, the working pressure of described first accumulator is greater than the working pressure of described second accumulator.
Preferably, described pump/motor is the two-way function pump/motor.
Preferably, described kinetic pump is a variable displacement pump, and described pump/motor is the variable pump/motor.
The utility model also provides a kind of wheeled crane hydraulic control system, comprise the hydraulic actuator of exporting running torque, described hydraulic actuator is specially pump/motor, and this hydraulic control system also comprises as above-mentioned each described pump/motor control loop.
Preferably, described pump/motor comprises get off some first pump/motors in the oil hydraulic circuit of described hydraulic control system, and each described first pump/motor is fixedlyed connected with each wheel center axle of described wheeled crane respectively.
Preferably, described pump/motor comprises second pump/motor, and this second pump/motor is located in the master winch oil hydraulic circuit in the oil hydraulic circuit of getting on the bus.
Preferably, described pump/motor also comprises the 3rd pump/motor, and the 3rd pump/motor is located in the secondary elevator oil hydraulic circuit in the oil hydraulic circuit of getting on the bus.
Preferably, described pump/motor also comprises the 4th pump/motor, and the 4th pump/motor is located in the turntable oil hydraulic circuit in the oil hydraulic circuit of getting on the bus.
The utility model also provides a kind of wheeled crane, comprises as weighing above-mentioned each described hydraulic control system.
Pump/motor control loop provided by the utility model, comprise pump/motor, kinetic pump, first accumulator and second accumulator, wherein, pump/motor is fixedlyed connected with corresponding parts to be driven, kinetic pump is used to drive pump/motor, and first accumulator and second accumulator are used.Pump/motor has pump work pattern and motor operations pattern, and when pump/motor was in the pump work pattern, the oil outlet of pump/motor was communicated with first accumulator, and the filler opening of pump/motor is communicated with second accumulator; When pump/motor was in the motor operations pattern, the oil outlet of pump/motor was communicated with the filler opening of kinetic pump, and the filler opening of pump/motor is communicated with the oil outlet of kinetic pump.Like this, when pump/motor was worked with motoring mode, driven pump pumped into the hydraulic oil of high pressure in the pump/motor, drive pump/motor and drive fixedly connected with it parts to be driven, after hydraulic oil after working becomes low pressure, be circulated back to the kinetic pump filler opening in pump/motor, use for driven pump.When pump/motor is reversed moment loading, will carry out work with the pump pattern, store thereby the pressure oil in second accumulator is pressed in first accumulator, realize mechanical energy to hydraulic pressure can conversion.When pump/motor was worked with motoring mode once more, the hydraulic oil in first accumulator can flow out, and the hydraulic oil in driven pump drives pump/motor, hydraulic pressure can be converted to mechanical energy once more, to reduce the energy loss of driven pump, the energy consumption of saving driven pump, the efficient of raising system.
A kind of preferred embodiment in, the working pressure of described first accumulator is greater than the working pressure of described second accumulator.When making pump/motor be in the pump work pattern, the hydraulic oil in the low pressure accumulator is squeezed in the accumulator of high pressure, be convenient to the reverse power acting; When pump/motor was in the motor operations pattern, hydraulic oil flowed out from high pressure accumulator, to flowing to low pressure accumulator after the pump/motor acting, realized that hydraulic pressure can be easy to realize to the conversion of mechanical energy.
Except above-mentioned pump/motor control loop, the utility model also provides a kind of wheeled crane hydraulic control system, the hydraulic actuator of this hydraulic control system output running torque, and its hydraulic actuator is specially pump/motor, simultaneously, the hydraulic control system that provides comprises above-mentioned pump/motor control loop.Because the pump/motor control loop has above-mentioned technique effect, the wheeled crane hydraulic control system with this pump/motor also has the corresponding techniques effect.
A kind of preferred embodiment in, described pump/motor comprises some first pump/motors, be located in the oil hydraulic circuit of getting off, and each described first pump/motor is fixedlyed connected with each wheel center axle of described wheeled crane respectively.During the wheeled crane cruising, kinetic pump is carried hydraulic oil respectively to the filler opening of each first pump/motor, drives the pattern work of each first pump/motor with motor, drives the central shaft rotation of each wheel, and wheeled crane is advanced.
When wheeled crane is braked, braking force is opposite with the direction of wheel rotation, opposite braking force can drive first pump/motor with the work of pump pattern, hydraulic oil in second accumulator is sucked first pump/motor, pressurize after the oil outlet of first pump/motor enters in first accumulator, hydraulic oil form with high pressure in first accumulator is stored, realize the conversion of kinetic energy, for next wheeled crane drives ready to the hydraulic pressure energy.Simultaneously, first pump/motor is providing auxiliary braking power to wheeled crane for the oil-filled process of first accumulator, and this braking force is consumed the kinetic energy of vehicle in the mode of energy recovery, realizes effective braking of vehicle.Like this, vehicle the time can be reduced friction the frequency of usage and the service time of braking plate in braking, prolongs the working life of friction brake wafer.
When wheeled crane is climbed, first accumulator can serve as auxiliary power source, the hydraulic oil of high pressure is provided, give the first pump/motor fuel feeding of each wheel together with kinetic pump, not only realize the quick supply of big driving power, increase the driving force of wheeled crane, improved the working efficiency of wheeled crane, and strengthened the energy-saving effect of wheeled crane.Simultaneously, first accumulator and second accumulator can use repeatedly, and its working life is longer, compare with respect to the storage battery recovered energy, can effectively reduce the cost of energy recovery.
In another preferred embodiment, the described oil hydraulic circuit of getting on the bus comprises the master winch oil hydraulic circuit, is provided with second pump/motor in this master winch loop.Like this, when the elevator lift heavy descends, weight descends and drives the rotation of second pump/motor, make of the pattern work of second pump/motor with pump, hydraulic oil in second accumulator is pumped in first accumulator, realize weight potential energy to the hydraulic pressure transformation of energy, the rate of descent of weight is by the discharge capacity control of second pump/motor.Hang when rising weight at elevator, first accumulator can be got pressure oil fast, and the combined power motor is given the second pump/motor fuel feeding together, thereby realizes the recycling of energy, reaches energy-conservation, purpose efficiently.
And, first accumulator both was communicated with the oil hydraulic circuit of getting off, and was communicated with the oil hydraulic circuit of getting on the bus again, can make full use of the energy in the get on the bus oil hydraulic circuit and the oil hydraulic circuit of getting off, the energy of wheeled crane under various working all can be reclaimed by first accumulator, be applied to again under other operating mode.Independently recycle with the oil hydraulic circuit of getting off with the oil hydraulic circuit of getting on the bus and to compare, unifiedly reclaim, the unified utilization more help making full use of recovered energy, improves the recovery utilization rate of energy, strengthens the energy-saving effect of wheeled crane.
Providing on the basis of above-mentioned hydraulic control system, the utility model also provides a kind of wheeled crane that comprises above-mentioned hydraulic control system; Because hydraulic control system has above-mentioned technique effect, the wheeled crane with this hydraulic control system also has the corresponding techniques effect.
Description of drawings
Fig. 1 provides the hydraulic schematic diagram of a kind of embodiment of pump/motor control loop for the utility model;
Fig. 2 is a pump/motor control loop shown in Figure 1 hydraulic schematic diagram when reclaiming mechanical energy;
Fig. 3 be pump/motor control loop shown in Figure 1 discharge hydraulic pressure can the time hydraulic schematic diagram;
Fig. 4 is in the motor operations pattern for pump/motor control loop shown in Figure 1 and the hydraulic schematic diagram when just changeing;
Hydraulic schematic diagram when Fig. 5 is in motor operations pattern and counter-rotating for pump/motor control loop shown in Figure 1;
Fig. 6 is the hydraulic schematic diagram of a kind of embodiment of wheeled crane hydraulic control system provided by the utility model
Hydraulic schematic diagram when Fig. 7 is in the recovered energy state for hydraulic system shown in Figure 6;
Fig. 8 is that hydraulic system shown in Figure 6 is in the hydraulic schematic diagram when releasing energy state.
Embodiment
Core of the present utility model provides a kind of pump/motor control loop and comprises the wheeled crane hydraulic control system of above-mentioned pump/motor control loop, this hydraulic control system can effectively reduce the energy consumption of wheeled crane, reduce the cost of energy recovery simultaneously, and improve the stability of hoisting system on this basis.Another core of the present utility model provides a kind of wheeled crane that comprises above-mentioned hydraulic control system, and its Economy is improved.
It is pointed out that pump/motor as herein described, mean in use, under a kind of operating mode, can use, promptly drive the output shaft rotation and do power output, hydraulic pressure can be converted into kinetic energy by the high pressure oil that flows through as motor; Under another kind of operating mode, can use, hydraulic oil be pumped, kinetic energy is converted into the hydraulic pressure energy by the live axle rotation as pump.Pump/motor can have two kinds of functions of pump and motor concurrently, and switches in these two kinds of functions in good time.
In order to make those skilled in the art person understand the utility model scheme better, the utility model is described in further detail below in conjunction with the drawings and specific embodiments.
Please refer to Fig. 1 to Fig. 3, Fig. 1 provides the hydraulic schematic diagram of a kind of embodiment of pump/motor control loop for the utility model; Fig. 2 is a pump/motor control loop shown in Figure 1 hydraulic schematic diagram when reclaiming mechanical energy; Fig. 3 be pump/motor control loop shown in Figure 1 discharge hydraulic pressure can the time hydraulic schematic diagram, direction shown in the arrow is the flow direction of hydraulic oil among the figure.
Pump/motor control loop provided by the utility model, comprise pump/motor, kinetic pump 3, first accumulator 1 and second accumulator 2, wherein, pump/motor is fixedlyed connected with corresponding parts to be driven, kinetic pump 3 is used to drive pump/motor, and first accumulator 1 and second accumulator 2 are used.Pump/motor has pump work pattern and motor operations pattern, and when pump/motor was in the pump work pattern, the oil outlet of pump/motor was communicated with first accumulator 1, and the filler opening of pump/motor is communicated with second accumulator 2; When pump/motor was in the motor operations pattern, the oil outlet of pump/motor was communicated with the filler opening of kinetic pump 3, and the filler opening of pump/motor is communicated with the oil outlet of kinetic pump 3.
Like this, when pump/motor was worked with motoring mode, kinetic pump 3 pumped into the hydraulic oil of high pressure in the pump/motor, drive pump/motor and drive fixedly connected with it parts to be driven, after hydraulic oil after working becomes low pressure, be circulated back to the kinetic pump filler opening in pump/motor, use for kinetic pump 3.When pump/motor is reversed moment loading, will carry out work with the pump pattern, thereby the pressure oil in second accumulator 2 will be pressed into storage in first accumulator 1, realize the conversion of mechanical energy to the hydraulic pressure energy.When pump/motor was worked with motoring mode once more, the hydraulic oil in first accumulator 1 can flow out, and the hydraulic oil in kinetic pump 3 drives pump/motor, hydraulic pressure can be converted to mechanical energy once more, to reduce the energy loss of kinetic pump 3, the energy consumption of saving kinetic pump 3, the efficient of raising system.
In a kind of concrete mode of execution, the working pressure of first accumulator 1 is greater than the working pressure of second accumulator 2.When making pump/motor be in the pump work pattern, the hydraulic oil of 2 li of second accumulators of low pressure is squeezed in first accumulator 1 of high pressure, be convenient to the reverse power acting; When pump/motor was in the motor operations pattern, hydraulic oil flowed out from high pressure accumulator, to flowing to low pressure accumulator after the pump/motor acting, realized that hydraulic pressure can be easy to realize to the conversion of mechanical energy.
Please refer to Fig. 4 and Fig. 5, Fig. 4 is in the motor operations pattern for pump/motor control loop shown in Figure 1 and the hydraulic schematic diagram when just changeing; Hydraulic schematic diagram when Fig. 5 is in motor operations pattern and counter-rotating for pump/motor control loop shown in Figure 1, direction shown in the arrow is the flow direction of hydraulic oil among the figure.
In further technological scheme, above-mentioned pump/motor can be the two-way function pump/motor, and pump/motor can just be changeed, also can reverse, and drive parts forward or reverse to be driven, to satisfy more operating mode, improve the Applicable scope of pump/motor control loop.
Preferably, pump/motor control loop medium power pump 3 provided by the utility model can be a variable displacement pump, and pump/motor can be the variable pump/motor, to realize the stepless shift function of parts to be driven, further improves the applicability of pump/motor control loop.
Please refer to Fig. 6, Fig. 6 is the hydraulic schematic diagram of a kind of embodiment of wheeled crane hydraulic control system provided by the utility model.
The utility model also provides a kind of wheeled crane hydraulic control system, comprises the hydraulic actuator of exporting running torque, and this hydraulic actuator can be pump/motor, and this hydraulic control system also comprises above-mentioned pump/motor control loop.Utilize the energy recovery function in the pump/motor control loop, reclaim the mechanical energy in the wheeled crane operator work, changing into hydraulic pressure can be stored in first accumulator, discharge the hydraulic pressure energy in due course, change into the mechanical energy acting, to reduce the energy consumption of wheeled crane, reach energy-conservation effect, improve the Economy of wheeled crane.
In a kind of concrete mode of execution, above-mentioned pump/motor comprises is located at get off some first pump/motors 4 in the oil hydraulic circuit of wheeled crane hydraulic control system, and each and first pump/motor 4 are fixedlyed connected with each wheel center axle of wheeled crane respectively.During the wheeled crane cruising, kinetic pump 3 is carried hydraulic oil respectively to the filler opening of each first pump/motor 4, drives the pattern work of each first pump/motor 4 with motor, drives the central shaft rotation of each wheel 8, and wheeled crane is advanced.
When wheeled crane is braked, its braking force is opposite with the wheel sense of rotation, braking force will drive first pump/motor 4 and work with the pump pattern, hydraulic oil in second accumulator 2 that will be communicated with the filler opening of first pump/motor 4 sucks first pump/motor 4, hydraulic oil pressurizes after the oil outlet of first pump/motor 4 enters in first accumulator 1, hydraulic oil form with high pressure in first accumulator 1 is stored, realize the conversion of kinetic energy, for next wheeled crane drives ready to the hydraulic pressure energy.
Simultaneously, first pump/motor 4 is in the auxiliary braking power of providing for first accumulator, 1 oil-filled process to wheeled crane, and this braking force is consumed the kinetic energy of vehicle in the mode of energy recovery, realizes effective braking of vehicle.Like this, vehicle the time can be reduced friction the frequency of usage and the service time of braking plate in braking, prolongs the working life of friction brake wafer.
When wheeled crane was climbed, first accumulator 1 can serve as auxiliary power source, outwards buys oil.First accumulator 1 is given together with kinetic pump 3 and first pump/motor, 4 fuel feeding of each wheel 8, not only realize the quick supply of big driving power, increased the driving force of wheeled crane, improve the working efficiency of wheeled crane, and reduced the consumption of crude oil, strengthened the energy-saving effect of wheeled crane.And first accumulator 1 and second accumulator 2 can use repeatedly, its working life is longer, compares with respect to the storage battery recovered energy, can effectively reduce the cost of energy recovery.
In a kind of concrete mode of execution, each first pump/motor 4 is two-way function variable pump/motor.Two-way function variable pump/motor all has two-way characteristics of buying oil, and therefore, can realize the wheeled crane two kinds of modes of travelling that move forward and backward, and realizes wheeled crane electrodeless variable-speed function simultaneously, satisfies more operating mode, and improves the travelling comfort of wheeled crane.
When wheeled crane advanced, kinetic pump 3 pumped hydraulic oil, was delivered to the filler opening of each first pump/motor 4, as shown in Figure 4, drove 4 work of first pump/motor, used as motor, and then drove each wheel 8 rotation of wheeled crane, and wheeled crane advances.
When wheeled crane retreats, kinetic pump 3 will be delivered to the respectively filler opening of first pump/motor 4 by hydraulic oil, as shown in Figure 5, just the variable swashplate angle of first pump/motor 4 changes, thereby the rotation direction of its output shaft is changed, thereby drive each wheel 8 counterrotating of wheeled crane, realize that wheeled crane retreats.
Please refer to Fig. 7 and Fig. 8, the hydraulic schematic diagram when Fig. 7 is in the recovered energy state for hydraulic system shown in Figure 6; Fig. 8 is that hydraulic system shown in Figure 6 is in the hydraulic schematic diagram when releasing energy state; Direction shown in the arrow is the flow direction of hydraulic oil among the figure, in order to be concise in expression, among the figure with the hydraulic oil flow in each oil hydraulic circuit under the different operating modes in the wheeled crane in all being drawn in a schematic representation, it will be understood by those of skill in the art that and not mean that all hydraulic oil that can occur simultaneously in the hydraulic system among the figure flows to.
In the concrete mode of execution of another kind, pump/motor comprises second pump/motor 5, this second pump/motor 5 is located at wheeled crane and is got on the bus in the master winch oil hydraulic circuit of oil hydraulic circuit, be to be provided with second pump/motor 5 in the master winch loop, when second pump/motor 5 is in the pump work pattern, first accumulator 1 is communicated with the oil outlet of second pump/motor 5, and second accumulator 2 is communicated with the filler opening of second pump/motor 5.Like this, when the elevator lift heavy descends, weight descends and drives 5 rotations of second pump/motor, make second pump/motor 5 with the work of pump pattern, hydraulic control system is in energy recovery state, the hydraulic oil that second accumulator is 2 li pumps in first accumulator 1, realizes weight potential energy to the hydraulic pressure transformation of energy, and the rate of descent of weight is by the discharge capacity control of second pump/motor 5.Hang when rising weight at elevator, hydraulic control system is in the state of releasing energy, and first accumulator 1 can be got pressure oil fast, and the combined power motor is given second pump/motor, 5 fuel feeding together, thereby realizes the recycling of energy, reaches energy-conservation, purpose efficiently.
And, first accumulator 1 both was communicated with the oil hydraulic circuit of getting off, be communicated with the oil hydraulic circuit of getting on the bus again, can make full use of the energy in the get on the bus oil hydraulic circuit and the oil hydraulic circuit of getting off, the energy of wheeled crane under various working all can be reclaimed by first accumulator 1, be applied to again under other operating mode.Independently recycle with the oil hydraulic circuit of getting off with the oil hydraulic circuit of getting on the bus and to compare, unifiedly reclaim, the unified utilization more help making full use of recovered energy, improves the recovery utilization rate of energy, strengthens the energy-saving effect of wheeled crane.
In further technological scheme, pump/motor in the wheeled crane hydraulic control system provided by the utility model can also comprise the 3rd pump/motor 6, and the 3rd pump/motor 6 is located in the secondary elevator oil hydraulic circuit of the oil hydraulic circuit of getting on the bus, be to be provided with the 3rd pump/motor 6 in the secondary elevator loop, when the 3rd pump/motor 6 is in the pump work pattern, first accumulator 1 is communicated with the oil outlet of the 3rd pump/motor 6, and second accumulator 2 is communicated with the filler opening of the 3rd pump/motor 6.Be to comprise master winch and secondary elevator in the wheeled crane, and be equipped with pump/motor in master winch oil hydraulic circuit and the secondary elevator oil hydraulic circuit.When weight descends, drive second pump/motor 5 and the 3rd pump/motor 6, the hydraulic oil in second accumulator 2 is squeezed in first accumulator 1, realize of the conversion of weight potential energy to the hydraulic pressure energy all with the work of pump pattern; When master winch and secondary elevator promoted weight, first accumulator 1 can be sent hydraulic oil fast to master winch and secondary elevator fuel feeding, realizes the utilization again of recovered energy.
Can above-mentioned hydraulic system be further improved.
The oil hydraulic circuit of getting on the bus also comprises the turntable oil hydraulic circuit, pump/motor also comprises the 4th pump/motor 7 in the hydraulic control system provided by the utility model, and the 4th pump/motor 7 is located in the turntable oil hydraulic circuit of the oil hydraulic circuit of getting on the bus, when the 4th pump/motor 7 is in the pump work pattern, first accumulator 1 is communicated with the oil outlet of the 4th pump/motor 7, and second accumulator 2 is communicated with the filler opening of the 4th pump/motor 7.Be hydraulic control system when being in energy recovery state, second accumulator 2 is communicated with the filler opening of the 4th pump/motor 7, and first accumulator 1 is communicated with the oil outlet of the 4th pump/motor 7; Hydraulic control system is in when releasing energy state, and second accumulator 2 is communicated with the oil outlet of the 4th pump/motor 7, and first accumulator 1 is communicated with the filler opening of the 4th pump/motor 7.Rotary system is when quitting work, if do not utilize break to brake, then turntable is because inertia can continue rotation, till the full consumption of inertia energy is fallen.Hydraulic system provided by the utility model can utilize first accumulator 1 and 2 pairs of revolutions of second accumulator inertia to reclaim, reclaim the similar of principle and master winch oil hydraulic circuit, what difference was the recovery of master winch oil hydraulic circuit is the potential energy of weight, and what the turntable oil hydraulic circuit reclaimed is the inertia energy of turntable.
Need to prove that master winch, secondary elevator and turntable are the common constituent elements of wheeled crane, master winch oil hydraulic circuit, secondary elevator oil hydraulic circuit and turntable oil hydraulic circuit all are prior aries that those skilled in the art should understand thoroughly, and do not do to launch to set forth at this.
Except above-mentioned hydraulic control system, the utility model also provides a kind of wheeled crane that comprises above-mentioned hydraulic control system, and the structure of these other each several parts of wheeled crane please refer to prior art, and this paper repeats no more.
More than wheeled crane provided by the utility model and hydraulic control system thereof, pump/motor control loop are described in detail.Used specific case herein principle of the present utility model and mode of execution are set forth, above embodiment's explanation just is used for helping to understand method of the present utility model and core concept thereof.Should be understood that; for those skilled in the art; under the prerequisite that does not break away from the utility model principle, can also carry out some improvement and modification to the utility model, these improvement and modification also fall in the protection domain of the utility model claim.
Claims (10)
1. a pump/motor control loop is characterized in that, comprises the pump/motor of fixedlying connected with corresponding parts to be driven, the kinetic pump that drives described pump/motor, and first accumulator that is used and second accumulator; Described first accumulator is communicated with the oil outlet of the described pump/motor that is in the pump work pattern, and described second accumulator is communicated with the filler opening of the described pump/motor that is in the pump work pattern; The oil outlet of described kinetic pump is communicated with the filler opening of the described pump/motor that is in the motor operations pattern, and the oil outlet that is in the described pump/motor of motor operations pattern is communicated with the filler opening of described kinetic pump.
2. pump/motor control loop according to claim 1 is characterized in that the working pressure of described first accumulator is greater than the working pressure of described second accumulator.
3. pump/motor control loop according to claim 1 is characterized in that, described pump/motor is the two-way function pump/motor.
4. pump/motor control loop according to claim 3 is characterized in that, described kinetic pump is a variable displacement pump, and described pump/motor is the variable pump/motor.
5. wheeled crane hydraulic control system, comprise the hydraulic actuator of exporting running torque, it is characterized in that described hydraulic actuator is specially pump/motor, and this hydraulic control system comprises also as each described pump/motor control loop in the claim 1 to 4.
6. wheeled crane hydraulic control system according to claim 5, it is characterized in that, described pump/motor comprises get off some first pump/motors in the oil hydraulic circuit of described hydraulic control system, and each described first pump/motor is fixedlyed connected with each wheel center axle of described wheeled crane respectively.
7. wheeled crane hydraulic control system according to claim 6 is characterized in that described pump/motor comprises second pump/motor, and this second pump/motor is located in the master winch oil hydraulic circuit in the oil hydraulic circuit of getting on the bus.
8. wheeled crane hydraulic control system according to claim 7 is characterized in that described pump/motor also comprises the 3rd pump/motor, and the 3rd pump/motor is located in the secondary elevator oil hydraulic circuit in the oil hydraulic circuit of getting on the bus.
9. wheeled crane hydraulic control system according to claim 6 is characterized in that described pump/motor also comprises the 4th pump/motor, and the 4th pump/motor is located in the turntable oil hydraulic circuit in the oil hydraulic circuit of getting on the bus.
10. a wheeled crane is characterized in that, comprises as each described hydraulic control system of claim 5 to 9.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102080675A (en) * | 2010-12-13 | 2011-06-01 | 徐州重型机械有限公司 | Wheeled crane and hydraulic control system and pump/motor control circuit thereof |
| CN102966609A (en) * | 2012-11-16 | 2013-03-13 | 无锡汇虹机械制造有限公司 | Hydraulic energy throttle releasing method of accumulator |
| CN103629168A (en) * | 2012-08-24 | 2014-03-12 | 本田技研工业株式会社 | Hydraulic pressure supply device |
| CN105276075A (en) * | 2014-07-23 | 2016-01-27 | 博世力士乐（常州）有限公司 | Hydraulic buffering system and equipment comprising hydraulic buffering system |
| CN105438988A (en) * | 2014-11-24 | 2016-03-30 | 徐州重型机械有限公司 | Crane winching energy recovery and reutilization method and system and crane |
| WO2016086753A1 (en) * | 2014-12-02 | 2016-06-09 | 徐州重型机械有限公司 | Power transmission control method and device for crane, and crane |
| CN107107698A (en) * | 2014-11-07 | 2017-08-29 | Ｋｙｂ株式会社 | Draft hitch |
| CN105276075B (en) * | 2014-07-23 | 2019-07-16 | 博世力士乐（常州）有限公司 | Hydraulic buffer system and equipment including the hydraulic buffer system |
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2010
- 2010-12-13 CN CN2010206592344U patent/CN201896799U/en not_active Expired - Lifetime
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102080675A (en) * | 2010-12-13 | 2011-06-01 | 徐州重型机械有限公司 | Wheeled crane and hydraulic control system and pump/motor control circuit thereof |
| CN102080675B (en) * | 2010-12-13 | 2013-06-05 | 徐州重型机械有限公司 | Wheeled crane and hydraulic control system and pump/motor control circuit thereof |
| CN103629168A (en) * | 2012-08-24 | 2014-03-12 | 本田技研工业株式会社 | Hydraulic pressure supply device |
| CN103629168B (en) * | 2012-08-24 | 2016-06-08 | 本田技研工业株式会社 | Hydraulic supply unit |
| CN102966609A (en) * | 2012-11-16 | 2013-03-13 | 无锡汇虹机械制造有限公司 | Hydraulic energy throttle releasing method of accumulator |
| CN105276075A (en) * | 2014-07-23 | 2016-01-27 | 博世力士乐（常州）有限公司 | Hydraulic buffering system and equipment comprising hydraulic buffering system |
| CN105276075B (en) * | 2014-07-23 | 2019-07-16 | 博世力士乐（常州）有限公司 | Hydraulic buffer system and equipment including the hydraulic buffer system |
| CN107107698A (en) * | 2014-11-07 | 2017-08-29 | Ｋｙｂ株式会社 | Draft hitch |
| CN105438988A (en) * | 2014-11-24 | 2016-03-30 | 徐州重型机械有限公司 | Crane winching energy recovery and reutilization method and system and crane |
| CN105438988B (en) * | 2014-11-24 | 2017-08-08 | 徐州重型机械有限公司 | Crane hoisting energy regenerating and reuse method and system and crane |
| WO2016086753A1 (en) * | 2014-12-02 | 2016-06-09 | 徐州重型机械有限公司 | Power transmission control method and device for crane, and crane |
| US10544013B2 (en) | 2014-12-02 | 2020-01-28 | Xuzhou Heavy Machinery Co., Ltd. | Power transmission control method and device for crane and crane |
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