CN101070866B - Hydraulic system heat-energy recovering and utilizing method and apparatus - Google Patents
Hydraulic system heat-energy recovering and utilizing method and apparatus Download PDFInfo
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- CN101070866B CN101070866B CN2007101229573A CN200710122957A CN101070866B CN 101070866 B CN101070866 B CN 101070866B CN 2007101229573 A CN2007101229573 A CN 2007101229573A CN 200710122957 A CN200710122957 A CN 200710122957A CN 101070866 B CN101070866 B CN 101070866B
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Abstract
A recovery method and device for using heat energy produced by hydraulic system processing. The method adopting heat pump technology collects the heat in cylinder in the operation of the hydraulic system, then sprays a low boiling poit working medium to the cylinder to absorb heat quickly, boiloff, increased internal energy. The internal energy of the working medium is transformed hydraulic energy by energy interpreter recoveried in bydraulic systerm. The invention reduces energy consumption,Improves the efficiency of hydraulic drive systems. The method of operation of the hydraulic system in the heat can be converted into hydraulic re-feedback in the hydraulic system, rather than its casual lost, reducing the hydraulic system of energy loss and to improve the efficiency of hydraulic drive system.
Description
Technical field
The present invention relates to a kind of hydraulic system heat energy recycle method and device, it is method and the device that utilizes heat pump techniques and liquid heat absorption vaporization, expanding work doing principle recovery and utilize the heat energy that produces in the hydraulic system processing, can be applicable to the hydraulic transmission field.
Background technique
During hydraulic equipment work, many-sided power loss is arranged, mainly comprise: the mechanical friction of pump, motor and oil hydraulic cylinder inside and viscous resistance loss; Restriction loss in pressure valve, the Flow valve; The internal and outernal leakage loss of directional control valve and the ducted pressure loss and various elements etc.The transmission efficiency of general hydraulic system has only 60%～70%, this just means that 30%～40% of power that prime mover provides will be lost, and these losses finally all change into heat, and these heats are except that sub-fraction is dispersed into surrounding space, and the overwhelming majority raises hydraulic oil and component temperature.If hydraulic fluid temperature too high (greater than 80 ℃) will have a strong impact on the hydraulic system proper functioning, thus existing Hydraulic Power Transmission System by different modes (as, air-cooled, water-cooled) system is dispelled the heat, to keep hydraulic working oil in certain temperature range.For these cooling systems, at first need the external world to provide certain energy to drive blower fan or water pump, make the wind of high temperature hydraulic oil and low temperature or water carry out heat exchange, thereby the heat energy dissipation that produces in system's running is fallen.
As seen, existing cooling system does not only utilize the heat energy that produces in the Hydraulic Power Transmission System running, and also need to consume certain energy this part heat energy dissipation is fallen, be great energy waste.Therefore, how to make full use of the heat energy that produces in the hydraulic system processing, energy saving reduces loss, improves the hydraulic system transmission efficiency and has just become a problem demanding prompt solution.
Summary of the invention
At the existing in prior technology problem, the object of the invention is exactly the method for a kind of heat energy that makes full use of in the hydraulic system processing to be produced of development, be the using heat pump technology with the thermal energy collecting that produces in the hydraulic system processing in a thermal-arrest cylinder, again low boiling working fluid is sprayed in this thermal-arrest cylinder, low boiling working fluid absorbs heat in this thermal-arrest cylinder, vaporizes, can increase in the working medium, the pressure energy of hydraulic oil will can be changed into by an energy transfer mechanism in the working medium, feed back in the hydraulic system, the temperature that reduces hydraulic oil simultaneously is maintained within a certain range it.
According to said method design hydraulic system heat energy recycle device, this device is characterised in that and comprises a thermal-arrest cylinder and an energy transfer mechanism, this thermal-arrest cylinder is made of the relative higher boiling between the barrel-shaped adiabatic wall of outside, inner barrel-shaped heat conducting wall, heat conducting wall and the adiabatic wall, the liquid and the heat pump heat conduction coil pipe of good heat conductivity, heat pump heat conduction coil pipe is wound between adiabatic wall and the heat conducting wall from top to bottom, be immersed in the liquid therebetween, part heat pump heat conducting disk pipe passes through heat conducting wall top and enters the thermal-arrest cylinder interior.
The inlet of heat pump heat conduction coil pipe links to each other with compressor outlet by the heat pump fluid transfer conduit, the outlet of heat pump heat conduction coil pipe links to each other with evaporator inlet through expansion valve, evaporator outlet links to each other with the suction port of compressor by the heat pump fluid transfer conduit, and vaporizer is installed in the hydraulic system.When system moved, heat pump fluid entered the thermal-arrest cylinder from heat pump heat conducting disk tube inlet, flowed out the thermal-arrest cylinder from the outlet of heat pump heat conduction coil pipe, and the heat energy that heat pump fluid transports will be collected in this thermal-arrest cylinder.
Nozzle is installed at thermal-arrest cylinder top, nozzle is at the heat conducting wall top and pass through between the heat pump heat conduction coil pipe of heat conducting wall, nozzle is connected with the low boiling working fluid container bottom by conduit, low boiling working fluid is housed in the container, the container upper space is communicated with the space A that is made of first piston and heat conducting wall by outlet pipe through cooling tube, and outlet valve and acceleration switching valve are housed respectively on outlet pipe and the conduit.
Energy transfer mechanism is made of first piston, connecting rod, spring, spring stop, second piston and oil cylinder, first piston is installed on heat conducting wall inside, second piston is installed on oil cylinder inside, by the coaxial connection of connecting rod, the oil cylinder top is with the adiabatic wall coaxial connection in bottom, mounting spring between first piston bottom and the adiabatic wall bottom, spring housing is contained on the connecting rod and is fixed in the spring stop.
Bottom one side of oil cylinder is connected with fuel tank by oil inlet pipe, be provided with first one-way valve in the oil inlet pipe, the outlet of first one-way valve links to each other with oil cylinder, the opposite side of oil cylinder links to each other with the hydraulic work system loop by oil outlet tube, second one-way valve is housed on oil outlet tube, second one-way valve inlet links to each other with oil cylinder, on the second one-way valve export pipeline accumulator is housed.
Oil cylinder and second piston in it constitute working space B, are full of hydraulic oil in this space.During device work, low boiling working fluid sprays among the working space A, heat absorption from the thermal-arrest cylinder, vaporization, expansion rapidly, the promotion first piston moves downward, second piston that drives in the oil cylinder through connecting rod moves downward, under the effect of second piston, the hydraulic oil among the working space B backs down the second one-way valve input hydraulic pressure system with certain pressure from a side.This just finished heat energy to hydraulic pressure can transform and feedback in the process of hydraulic system, in this course, spring is compressed.
After the working medium complete expansion in spraying into working space A, the piston stop motion, at this moment open outlet valve, under the effect of spring force, first piston moves upward, gas after the expansion will be discharged into the upper end of low boiling working fluid container, under the drive of connecting rod, in-oil cylinder second piston also moves upward, and the hydraulic oil in the fuel tank will back down first one-way valve from the opposite side of oil cylinder and be full of working space B, run to maximum position until second piston, close outlet valve.This has just finished once acting circulation.
Hydraulic system heat energy recycle method of the present invention can be converted into the heat energy that produces in the hydraulic system processing hydraulic pressure energy, again feedback is in hydraulic system, rather than directly it is lost, so just reduce the energy loss of hydraulic system, improved the transmission efficiency of hydraulic system.
Description of drawings
The present invention has 3 accompanying drawings, wherein:
Fig. 1 is a hydraulic system heat energy recycle device thermal-arrest process schematic representation;
Fig. 2 sprays into working medium moment schematic representation for hydraulic system heat energy recycle device;
Fig. 3 is the vaporization of hydraulic system heat energy recycle device working medium, expands and acting process schematic representation;
Fig. 4 is device exhaust of hydraulic system heat energy recycle and oil-absorbing process schematic representation;
Fig. 5 is a hydraulic system heat energy recycle device overall schematic.
Among the figure: 1, vaporizer 2, expansion valve 3, compressor 4, heat pump heat conduction coil pipe 5, heat pump fluid transfer conduit 6, low boiling working fluid container 7, low boiling working fluid 8, outlet pipe 9, conduit 10, high-speed switch valve 11, outlet valve 12, nozzle 13, adiabatic wall 14, heat conducting wall 15, first piston 16, connecting rod 17, spring 18, high boiling liquid 19, spring stop 20, second piston 21, oil cylinder 22, fuel tank 23, first one-way valve 24, oil inlet pipe 25, oil outlet tube 26, second one-way valve 27, accumulator 28, cooling tube
Embodiment
Among Fig. 1, heat pump fluid absorbs heat through expansion valve 2 by vaporizer 1 from hydraulic system, after compressed machine 3 compressions, in heat pump fluid transfer conduit 5 input heat pump heat conduction coil pipes 4, carry out heat exchange with the thermal-arrest cylinder, the heat pump fluid after the heat exchange flows into expansion valve 2 again through 4 outlets of heat pump heat conduction coil pipe.Like this, the heat that produces in the hydraulic system processing just will be collected in the thermal-arrest cylinder, keep hydraulic working oil in certain temperature range.
Among Fig. 2, high-speed switch valve 10 is opened, and low boiling working fluid 7 sprays into the working space A through nozzle 12 along conduit 9 from low boiling working fluid container 6, and after working medium 7 sprayed among the A, high-speed switch valve 10 was closed rapidly, finished working medium and sprayed into process.
Among Fig. 3, high-speed switch valve 10 is closed, and outlet valve 11 is closed, and the low boiling working fluid 7 that sprays among the working space A absorbs heat from the thermal-arrest cylinder, expands rapidly, promote first piston 15 during expansion and move downward, first piston 15 drives second piston 20 by connecting rod 16 and moves downward together.When second piston 20 moves downward, working space B will reduce, and then the hydraulic oil among the B will back down first one-way valve, 26 backs along in the oil outlet tube 25 input hydraulic pressure systems, finish conversion and the feedback of system's heat energy to the hydraulic pressure energy.In first piston 15 downward runnings, the spring 17 that is arranged between first piston 15 lower ends and adiabatic wall 13 bottoms is compressed.
Among Fig. 4, outlet valve 11 is opened, and spring 17 expands, promoting first piston 15 moves upward, make the gas among the working space A enter the upper space of container 6 along outlet pipe 8, under the drive of connecting rod 16, second piston 20 also moves upward, hydraulic oil backs down first one- way valve 23 and 24 is inhaled into the working space B from fuel tank 22 along oil inlet pipe, when spring 17 expansions finish, close outlet valve 11, will repeat working medium subsequently and spray into process, as shown in Figure 1, device is with periodic duty.
Fig. 5 is the overall schematic of hydraulic system heat energy recycle device.As seen from the figure, accumulator 27 and cooling tube 28 have been increased.Accumulator 27 is used for reducing the pulsation of oil cylinder 21 to systems pumps oil the time; Cooling tube 28 is in order to quicken the steam liquefying speed of low boiling working fluid 7, speed and refrigerant vapor liquefying speed that low boiling working fluid 7 is sprayed among the working space A maintain a relative balance state, for increasing the vaporization rate of low boiling working fluid 7 in the thermal-arrest cylinder, a part of heat conduction coil pipe 4 is directly passed through heat conducting wall 14 at thermal-arrest cylinder top and introduce among the working space A simultaneously.
The concrete enforcement of the present invention is as follows.
Shown in accompanying drawing 5, select vaporizer 1, expansion valve 2, compressor 3 and the heat pump fluid transfer conduit 5 of coupling mutually according to hydraulic system actual power size.Design adiabatic wall 13 and heat conducting wall 14, from top to bottom heat pump heat conduction coil pipe 4 is wound between heat conducting wall 14 and the adiabatic wall 13, the inlet of heat pump heat conduction coil pipe 4 links to each other with compressor 3 outlets by heat pump fluid transfer conduit 5,4 outlets of heat pump heat conduction coil pipe link to each other with vaporizer 1 inlet through expansion valve 2, and vaporizer 1 outlet links to each other with compressor 3 inlets by heat pump fluid transfer conduit 5.
Select suitable low boiling working fluid 7, outlet pipe 8, conduit 9, acceleration switching valve 10, outlet valve 11 and nozzle 12, design containers 6 and cooling tube 28.Nozzle 12 is installed on heat conducting wall 14 tops and passes through between the heat pump heat conduction coil pipe 4 of heat conducting wall 14, nozzle 12 is connected with low boiling working fluid container 6 bottoms by conduit 9, low boiling working fluid 7 is packed in the container 6, container 6 upper spaces are communicated with working space A by outlet pipe 8 through cooling tube 28, on outlet pipe 8 and the conduit 9 outlet valve 11, high-speed switch valve 10 are housed respectively.
Select suitable connecting rod 16 and spring 17, design first piston 15, spring stop 19, second piston 20 and oil cylinder 21.First piston 15 is installed on heat conducting wall 14 inside, second piston 20 is installed on oil cylinder 21 inside, by connecting rod 16 coaxial connections, oil cylinder 21 tops are with the coaxial connection in adiabatic wall 13 bottoms, mounting spring 17 between first piston 15 bottoms and adiabatic wall 13 bottoms, spring 17 is sleeved on the connecting rod 16 and is fixed in the spring stop 19.
Select suitable first one-way valve 23, oil inlet pipe 24, oil outlet tube 25, second one-way valve 26 and accumulator 27.Bottom one side of oil cylinder 21 is connected with fuel tank 22 by oil inlet pipe 24, is provided with 23 outlets of first one-way valve, 23, the first one-way valves in the oil inlet pipe 24 and links to each other with oil cylinder 21.The opposite side of oil cylinder 21 is by oil outlet tube 25 (not shown) that links to each other with the hydraulic work system loop, and it is continuous with oil cylinder 21 that second one-way valve, 26, the second one-way valves, 26 inlets are housed on oil outlet tube 25, on second one-way valve, 26 export pipelines accumulator 27 is housed.
Claims (6)
1. hydraulic system heat energy recycle device, it is characterized in that: comprise thermal-arrest cylinder and energy transfer mechanism, described thermal-arrest cylinder is by the barrel-shaped adiabatic wall (13) of outside, inner barrel-shaped heat conducting wall (14), relative higher boiling between heat conducting wall (14) and the adiabatic wall (13), liquid of good heat conductivity (18) and heat pump heat conduction coil pipe (4) constitute, heat pump heat conduction coil pipe (4) is wound between adiabatic wall (13) and the heat conducting wall (14) from top to bottom, be immersed in the liquid (18), part heat pump heat conducting disk pipe (4) passes through heat conducting wall (14) top and enters the thermal-arrest cylinder interior; Described energy transfer mechanism is by first piston (15), connecting rod (16), spring (17), spring stop (19), second piston (20) and oil cylinder (21) constitute, first piston (15) is installed on heat conducting wall (14) inside, second piston (20) is installed on oil cylinder (21) inside, first piston (15) and second piston (20) are by coaxial connection of connecting rod (16), oil cylinder (21) top is with adiabatic wall (13) the coaxial connection in bottom, mounting spring (17) between first piston (15) bottom and adiabatic wall (13) bottom, spring (17) is sleeved on the connecting rod (16) and is fixed in the spring stop (19).
2. hydraulic system heat energy recycle device according to claim 1, it is characterized in that: nozzle (12) is installed at thermal-arrest cylinder top, nozzle (12) is positioned at heat conducting wall (14) top and passes through between the heat pump heat conduction coil pipe (4) of heat conducting wall (14), nozzle (12) is connected with low boiling working fluid container (6) bottom by conduit (9), low boiling working fluid (7) is housed in the container (6), container (6) upper space by outlet pipe (8) and the spatial communication that is made of first piston (15) and heat conducting wall (14), respectively is equipped with outlet valve (11) and acceleration switching valve (10) on outlet pipe (8) and the conduit (9) through cooling tube (28).
3. hydraulic system heat energy recycle device according to claim 1, it is characterized in that: the inlet of heat pump heat conduction coil pipe (4) links to each other with compressor (3) outlet by heat pump fluid transfer conduit (5), heat pump heat conduction coil pipe (4) outlet links to each other with vaporizer (1) inlet through expansion valve (2), vaporizer (1) outlet links to each other with compressor (3) inlet by working medium transfer conduit (5), and vaporizer (1) is installed in the hydraulic system.
4. hydraulic system heat energy recycle device according to claim 1, it is characterized in that: bottom one side of oil cylinder (21) is connected with fuel tank (22) by oil inlet pipe (24), be provided with first one-way valve (23) in the oil inlet pipe (24), first one-way valve (23) outlet links to each other with oil cylinder (21), the opposite side of oil cylinder (21) links to each other with the hydraulic work system loop by oil outlet tube (25), second one-way valve (26) is housed on oil outlet tube (25), second one-way valve (26) inlet links to each other with oil cylinder (21), on second one-way valve (26) export pipeline accumulator (27) is housed.
5. hydraulic system heat energy recycle device according to claim 4 is characterized in that: the internal diameter of barrel-shaped heat conducting wall (14) is greater than the internal diameter of oil cylinder (21).
6. according to the arbitrary described hydraulic system heat energy recycle device of claim 2-5, it is characterized in that: described liquid (18) is water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101229573A CN101070866B (en) | 2007-07-06 | 2007-07-06 | Hydraulic system heat-energy recovering and utilizing method and apparatus |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101229573A CN101070866B (en) | 2007-07-06 | 2007-07-06 | Hydraulic system heat-energy recovering and utilizing method and apparatus |
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| Publication Number | Publication Date |
|---|---|
| CN101070866A CN101070866A (en) | 2007-11-14 |
| CN101070866B true CN101070866B (en) | 2010-09-15 |
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| CN2007101229573A Expired - Fee Related CN101070866B (en) | 2007-07-06 | 2007-07-06 | Hydraulic system heat-energy recovering and utilizing method and apparatus |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE102010051663A1 (en) * | 2010-11-17 | 2012-05-24 | Liebherr-Hydraulikbagger Gmbh | implement |
| CN105890016A (en) * | 2016-05-27 | 2016-08-24 | 燕山大学 | System utilizing hydraulic oil heat for heating |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2556370Y (en) * | 2002-06-17 | 2003-06-18 | 江顺天 | Engine waste heat recovery building device |
| CN1842649A (en) * | 2004-09-21 | 2006-10-04 | 新履带牵引车三菱有限公司 | Waste heat energy regenerating method and waste heat energy regenerating apparatus |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2556370Y (en) * | 2002-06-17 | 2003-06-18 | 江顺天 | Engine waste heat recovery building device |
| CN1842649A (en) * | 2004-09-21 | 2006-10-04 | 新履带牵引车三菱有限公司 | Waste heat energy regenerating method and waste heat energy regenerating apparatus |
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