CN110259768B - Temperature control device of hydraulic system - Google Patents
Temperature control device of hydraulic system Download PDFInfo
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- CN110259768B CN110259768B CN201910582483.3A CN201910582483A CN110259768B CN 110259768 B CN110259768 B CN 110259768B CN 201910582483 A CN201910582483 A CN 201910582483A CN 110259768 B CN110259768 B CN 110259768B
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- 239000012782 phase change material Substances 0.000 claims abstract description 174
- 239000003921 oil Substances 0.000 claims abstract description 166
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 42
- 238000005192 partition Methods 0.000 claims abstract description 31
- 239000011162 core material Substances 0.000 claims description 9
- 239000002131 composite material Substances 0.000 claims description 8
- 239000007788 liquid Substances 0.000 claims description 8
- 239000003094 microcapsule Substances 0.000 claims description 8
- 230000008859 change Effects 0.000 claims description 7
- 238000001514 detection method Methods 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 claims description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 3
- 229920001807 Urea-formaldehyde Polymers 0.000 claims description 3
- HANVTCGOAROXMV-UHFFFAOYSA-N formaldehyde;1,3,5-triazine-2,4,6-triamine;urea Chemical compound O=C.NC(N)=O.NC1=NC(N)=NC(N)=N1 HANVTCGOAROXMV-UHFFFAOYSA-N 0.000 claims description 3
- 229910021389 graphene Inorganic materials 0.000 claims description 3
- 238000009413 insulation Methods 0.000 claims description 3
- 239000002048 multi walled nanotube Substances 0.000 claims description 3
- 239000012188 paraffin wax Substances 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- 230000017525 heat dissipation Effects 0.000 abstract description 30
- 230000000694 effects Effects 0.000 abstract description 8
- 230000007613 environmental effect Effects 0.000 description 7
- 238000004146 energy storage Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 238000001816 cooling Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000001105 regulatory effect Effects 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000005553 drilling Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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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
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/04—Special measures taken in connection with the properties of the fluid
- F15B21/042—Controlling the temperature of the fluid
-
- 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
- F15B21/04—Special measures taken in connection with the properties of the fluid
- F15B21/042—Controlling the temperature of the fluid
- F15B21/0423—Cooling
-
- 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
- F15B21/04—Special measures taken in connection with the properties of the fluid
- F15B21/042—Controlling the temperature of the fluid
- F15B21/0427—Heating
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention provides a temperature control device of a hydraulic system, which relates to the technical field of hydraulic equipment, and comprises an oil pipe and a phase change material container; the oil pipe penetrates through the phase change material container and one end of the oil pipe is connected with the hydraulic oil tank, and the oil pipe is provided with a pipe wall capable of exchanging heat with the phase change material; the phase change material container comprises a partition plate, wherein the partition plate divides the interior of the phase change material container into a first space and a second space, an overflow device is arranged on the partition plate, the overflow device controls the phase change material to flow between the first space and the second space, the problems that the existing hydraulic system is insufficient in heat dissipation efficiency in a high-temperature environment and needs to be preheated in a low-temperature environment are solved, and the technical effects of auxiliary heat dissipation and auxiliary preheating of an oil pipe through the phase change material are achieved.
Description
Technical Field
The invention relates to the technical field of hydraulic equipment, in particular to a temperature control device of a hydraulic system, which can assist the heat dissipation and the preheating of the hydraulic system.
Background
In the field of engineering machinery, large-scale engineering machinery such as an excavator, a rotary drilling rig and the like needs to work for a long time, in summer, the engineering machinery is frequently stopped and maintained to avoid faults due to overhigh environmental temperature, and meanwhile, the hydraulic components of the engineering machinery are greatly lost in a high-temperature environment, so that the service life of the machinery is seriously influenced; in winter or in cold areas of a plateau, engineering machinery can normally work and use after being started up and preheated for a long time due to low environmental temperature, so that working hours and resources are seriously wasted.
In the prior art, the phase change material can be used in the field of electrical components, in the field of engineering machinery, the phase change material is usually used for engine heat dissipation application, and has less application to hydraulic systems such as hydraulic pumps, hydraulic oil tanks, hydraulic valves and hydraulic pipelines, and particularly, the application of the phase change material in the aspects of system heat dissipation and system energy storage of the hydraulic systems is required to be further rationally designed and optimized.
The hydraulic oil heat dissipation working principle of the existing hydraulic system is as follows: the hydraulic oil in the hydraulic oil tank is sucked out by the oil pump and then enters the radiator, and the high-temperature hydraulic oil in the radiator and cold media such as cold air and the like are subjected to cold-heat exchange and then the temperature-reduced hydraulic oil flows back to the hydraulic oil tank for the main pump to suck oil. The cooling of the hydraulic oil in the hydraulic system is realized by the circulation.
The heat dissipation method has the following defects: when the environmental temperature is high in summer, the radiator of the existing hydraulic system is insufficient in radiating function, and the radiating function of the radiator is reduced along with the temperature rise, so that the whole temperature of the hydraulic system is gradually increased, the problems of shutdown maintenance and component loss of the hydraulic system still can be caused, and although the problems can be improved by improving the working efficiency of the radiator, the improving effect is not obvious, and meanwhile, the load of an engine is increased; when the environmental temperature is low in winter, the heat dissipation power required by the existing hydraulic system is low, but after the engineering machinery is started, the hydraulic system needs to be preheated, and the radiator still works with the original power, so that waste is caused, and the hydraulic system is preheated without any effect.
Disclosure of Invention
The invention aims to provide a temperature control device of a pressure system so as to solve the problem that the use of a hydraulic system in the existing engineering machinery is limited in high-temperature and low-temperature environments.
The invention provides a temperature control device of a hydraulic system, which comprises an oil pipe and a phase change material container;
the oil pipe penetrates through the phase change material container and one end of the oil pipe is connected with the hydraulic oil tank, and the oil pipe is provided with a pipe wall capable of exchanging heat with the phase change material;
the phase change material container comprises a partition plate, wherein the partition plate divides the interior of the phase change material container into a first space and a second space, and an overflow device is arranged on the partition plate and controls the phase change material to flow between the first space and the second space.
Further, the overflow device comprises a control device, and the control device is connected with the overflow device.
Further, the hydraulic system further comprises a temperature detection device arranged outside the hydraulic system, and the control device is connected with the temperature detection device.
Further, the oil pipe passes through the first space or the second space of the phase change material container.
Further, the overflow device comprises a first overflow device and a second overflow device.
Further, the first overflow device is a first one-way valve, the second overflow device is a second one-way valve, and the installation directions of the first one-way valve and the second one-way valve are opposite.
Further, the phase change material container is internally provided with a phase change material with the phase change temperature of 75-85 ℃.
Further, the core material of the phase change material is paraffin, the wall material of the phase change material is melamine-urea formaldehyde resin, and the core material also comprises nano graphene, nano silver and multi-wall carbon nanotubes.
Furthermore, the wall material and the core material of the phase change material are composite phase change microcapsules.
Further, an insulating layer is arranged on the outer side of the phase change material container.
In another aspect, a hydraulic system includes a temperature control device of any one of the hydraulic systems described above.
According to the temperature control device of the hydraulic system, the phase change material container is arranged on the oil pipe between the hydraulic oil tank and the radiator, the oil pipe is provided with the pipe wall capable of exchanging heat with the phase change material, and the phase change material plays roles of assisting in heat dissipation and assisting in preheating of the oil pipe, so that the problems that the existing hydraulic system is insufficient in heat dissipation efficiency in a high-temperature environment and needs to be preheated in a low-temperature environment are solved; further, the phase change material container is divided into a first space and a second space by the partition plate, the oil pipe only penetrates through the first space or the second space, and the phase change material is regulated to flow between the first space and the second space by the overflow device, so that the heat dissipation efficiency or the heat absorption efficiency of the oil pipe in the phase change material container is controlled. In addition, the phase change material flowing between the first space and the second space is regulated by the overflow device, the heat absorbing phase change material can be stored in the adjacent space of the oil pipe, the inflow is controlled when the oil pipe needs to absorb heat, the self-heating energy loss of the phase change material in a long-time storage environment is avoided, and the energy storage effect cannot be exerted due to insufficient energy storage of the phase change material when the engineering machinery is preheated.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a temperature control device of a hydraulic system according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a phase change material container according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a heat exchange process between an oil pipe and a phase change material according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a heat exchange process between an oil pipe and a phase change material according to another embodiment of the present invention.
Icon: 10-a hydraulic oil tank; 20-oil pipe; 21-oil inlet; 22-oil outlet; 23-tube wall; 30-a phase change material container; 301-a first space; 302-a second space; 31-a separator; 32-overflow means; 321-a first one-way valve; 322-a second one-way valve; 34-composite phase change microcapsules.
Detailed Description
The technical solutions of the present invention will be clearly and completely described in connection with the embodiments, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
The existing hydraulic system of the engineering machinery has the defects that when the environmental temperature in summer is high, the existing hydraulic system has the defects of insufficient heat dissipation function of a radiator, and the heat dissipation function of the radiator is reduced along with the temperature rise, so that the whole temperature of the hydraulic system is gradually increased, the problems of shutdown maintenance and component loss of the hydraulic system still can be caused, and although the problems can be improved by improving the working efficiency of the radiator, the improvement effect is not obvious, and meanwhile, the load of an engine is increased; when the environmental temperature is low in winter, the heat dissipation power required by the existing hydraulic system is low, but after the engineering machinery is started, the hydraulic system needs to be preheated, and the radiator still works with the original power, so that waste is caused, and the hydraulic system is preheated without any effect.
In order to solve the above technical problems, the present embodiment provides a temperature control device of a hydraulic system, as shown in fig. 1, including an oil pipe 20 and a phase change material container 30;
the oil pipe 20 passes through the phase change material container 30 and one end of the oil pipe is connected with the hydraulic oil tank 10;
the oil pipe 20 is provided with a pipe wall 23 which can exchange heat with the phase change material;
the oil pipe 20 comprises an oil inlet 21 and an oil outlet 22, the oil inlet 21 is connected with the hydraulic oil tank 10, the oil outlet 22 is connected with the radiator, high-temperature oil in the hydraulic oil tank 10 is pumped by the oil pump and is input into the oil pipe 20, the high-temperature oil exchanges heat with the phase-change material in the phase-change material container 30 and reduces the temperature when passing through the phase-change material container 30 in the oil pipe 20, and the oil after the temperature reduction enters the radiator for further cooling treatment and returns to the hydraulic oil tank 10.
As shown in fig. 3, the oil pipe 20 flows through the high-temperature oil, and the heat of the high-temperature oil is transmitted to the composite phase-change microcapsule 34 through the pipe wall 23, and the composite phase-change microcapsule 34 is converted into a liquid form and is diffused outwards when the temperature exceeds the phase-change temperature, so that the auxiliary heat dissipation function of the hydraulic system is realized.
As shown in fig. 4, the low-temperature oil flows through the oil pipe 20, and the heat of the composite phase-change microcapsule 34 is transmitted to the low-temperature oil through the pipe wall 23, so that the composite phase-change microcapsule 34 is converted from a liquid state to a particle state, and the preheating function of the hydraulic system is realized.
When the engineering machinery is preheated, low-temperature oil in the hydraulic oil tank 10 is pumped by an oil pump and is input into the oil pipe 20, when the low-temperature oil passes through the phase-change material container 30 in the oil pipe 20, the low-temperature oil exchanges heat with the phase-change material in the phase-change material container 30 and increases the temperature, and the oil with the increased temperature returns to the hydraulic oil tank 10.
The phase change material container 30 comprises a partition plate 31, the partition plate 31 divides the interior of the phase change material container 30 into a first space 301 and a second space 302, an overflow device 32 is arranged on the partition plate 31, and the overflow device 32 controls the phase change material to flow between the first space 301 and the second space 302.
The partition 31 divides the inside of the phase change material container 30 into a first space 301 and a second space 302, the oil pipe 20 may be disposed in the first space 301 or the second space 302, and the oil pipe 20 may be disposed in the first space 301 and the second space 302. Taking the example that the oil pipe 20 is arranged in the first space 301, the first space 301 is filled with the phase change material, when the oil with higher flowing temperature (more than 85 ℃) in the oil pipe 20, the granular phase change material absorbs heat and converts into a liquid form and expands outwards, and the phase change material changes into a granular form again after the temperature of the phase change material is reduced, and the phase change material circularly flows to realize the heat conversion.
The phase change material plays roles of auxiliary heat dissipation and auxiliary preheating on the oil pipe 20, so that the problems of insufficient heat dissipation efficiency in a high-temperature environment and preheating requirement in a low-temperature environment of the conventional hydraulic system are solved.
Example two
When the heat dissipation method of the hydraulic system of the existing engineering machinery is insufficient, the temperature control device of the hydraulic system in the embodiment can assist the hydraulic system to dissipate heat or preheat, however, under a reasonable environment temperature, the existing radiator can meet the normal use of the engineering machinery, and the temperature control device of the hydraulic system is used in an auxiliary mode for further improving the heat dissipation power of the radiator or providing a preheating function, taking the heat dissipation power of the radiator as an example, when the oil temperature in the hydraulic oil tank 10 is in a normal threshold range, part of the phase change materials in the phase change material container 30 are selected to be used, when the oil temperature in the hydraulic oil tank 10 is further increased to a high temperature threshold, all the phase change materials in the phase change material container 30 can be selected to be used, all the capabilities of the phase change material container 30 can be exerted, and after the oil temperature can be sufficiently reduced, the high temperature oil is input into the radiator for further heat dissipation.
To achieve the above object, the present embodiment provides a temperature control device of a hydraulic system, as shown in fig. 1, including an oil pipe 20 and a phase change material container 30;
the oil pipe 20 passes through the phase change material container 30 and one end of the oil pipe is connected with the hydraulic oil tank 10;
the oil pipe 20 is provided with a pipe wall 23 which can exchange heat with the phase change material;
the oil pipe 20 comprises an oil inlet 21 and an oil outlet 22, the oil inlet 21 is connected with the hydraulic oil tank 10, the oil outlet 22 is connected with the radiator, high-temperature oil in the hydraulic oil tank 10 is pumped by the oil pump and is input into the oil pipe 20, the high-temperature oil exchanges heat with the phase-change material in the phase-change material container 30 and reduces the temperature when passing through the phase-change material container 30 in the oil pipe 20, and the oil after the temperature reduction enters the radiator for further cooling treatment and returns to the hydraulic oil tank 10.
When the engineering machinery is preheated, low-temperature oil in the hydraulic oil tank 10 is pumped by an oil pump and is input into the oil pipe 20, when the low-temperature oil passes through the phase-change material container 30 in the oil pipe 20, the low-temperature oil exchanges heat with the phase-change material in the phase-change material container 30 and increases the temperature, and the oil with the increased temperature returns to the hydraulic oil tank 10.
The phase change material container 30 comprises a partition plate 31, the partition plate 31 divides the interior of the phase change material container 30 into a first space 301 and a second space 302, an overflow device 32 is arranged on the partition plate 31, and the overflow device 32 controls the phase change material to flow between the first space 301 and the second space 302.
The partition 31 divides the interior of the phase change material container 30 into a first space 301 and a second space 302, and the oil pipe 20 may be disposed in the first space 301 or the second space 302. Taking the example that the oil pipe 20 is arranged in the first space 301, the first space 301 is filled with the phase change material, the overflow device 32 regulates and controls part of the phase change material to flow into the first space 301, when the oil flowing through the oil pipe 20 at a higher temperature (more than 85 ℃) is heated, the granular phase change material absorbs heat and converts into a liquid form and expands outwards, the phase change material changes into a granular form again after the temperature of the phase change material is reduced, and the phase change material flows circularly in this way, so that heat conversion is realized. When the oil with extremely high temperature flows in the oil pipe 20, the overflow device 32 regulates and controls all the phase change materials to flow into the first space 301, the granular phase change materials absorb heat and convert into a liquid form and expand to the outside, and the phase change materials become into a granular form again after the temperature of the phase change materials is reduced, so that the phase change materials circularly flow, and the heat conversion is realized.
The phase change material plays roles of auxiliary heat dissipation and auxiliary preheating on the oil pipe 20, so that the problems of insufficient heat dissipation efficiency in a high-temperature environment and preheating requirement in a low-temperature environment of the existing hydraulic system are solved; further, the phase change material container 30 is divided into a first space 301 and a second space 302 by a partition 31, and the oil pipe 20 only passes through the first space 301 or the second space 302, and the flow of the phase change material between the first space 301 and the second space 302 is regulated by the overflow device 32, so that the heat dissipation efficiency or the heat absorption efficiency of the oil pipe 20 in the phase change material container 30 is controlled.
Example III
The embodiment is important to the hydraulic system of the engineering machinery, when the environmental temperature is low, the hydraulic system needs to be preheated after the engineering machinery is started, and the radiator still works with the original power, so that the problems of waste and no effect on the preheating of the hydraulic system are caused.
In order to solve the above technical problems, the present embodiment provides a temperature control device of a hydraulic system, as shown in fig. 1, including an oil pipe 20 and a phase change material container 30;
the oil pipe 20 passes through the phase change material container 30 and one end of the oil pipe is connected with the hydraulic oil tank 10;
the oil pipe 20 is provided with a pipe wall 23 which can exchange heat with the phase change material;
the oil pipe 20 comprises an oil inlet 21 and an oil outlet 22, the oil inlet 21 is connected with the hydraulic oil tank 10, the oil outlet 22 is connected with the radiator, and high-temperature oil in the hydraulic oil tank 10 is pumped by the oil pump and is input into the oil pipe 20.
When the engineering machinery is preheated, low-temperature oil in the hydraulic oil tank 10 is pumped by an oil pump and is input into the oil pipe 20, when the low-temperature oil passes through the phase-change material container 30 in the oil pipe 20, the low-temperature oil exchanges heat with the phase-change material in the phase-change material container 30 and increases the temperature, and the oil with the increased temperature returns to the hydraulic oil tank 10.
The phase change material container 30 comprises a partition plate 31, the partition plate 31 divides the interior of the phase change material container 30 into a first space 301 and a second space 302, an overflow device 32 is arranged on the partition plate 31, and the overflow device 32 controls the phase change material to flow between the first space 301 and the second space 302.
The partition 31 divides the inside of the phase change material container 30 into a first space 301 and a second space 302, the oil pipe 20 may be disposed in the first space 301 or the second space 302, and the oil pipe 20 may be disposed in the first space 301 and the second space 302. Taking the example that the oil pipe 20 is arranged in the first space 301, the first space 301 is filled with the phase change material, when the oil with high flowing temperature (more than 85 ℃) in the oil pipe 20 flows, the granular phase change material absorbs heat and converts into a liquid form to expand outwards, and at the moment, the phase change material absorbing a large amount of heat is stored in the second space 302 through the overflow device 32 for energy storage for standby. When the engineering machinery needs to be preheated, the phase change material is conveyed back to the first space 301 from the second space 302 through the overflow device 32, low-temperature oil exchanges heat with the phase change material in the phase change material container 30 and increases the temperature when passing through the phase change material container 30 in the oil pipe 20, and the oil after the temperature increase returns to the hydraulic oil tank 10. The implementation method can avoid the problem that the phase change material automatically releases heat to reduce the temperature when the oil temperature in the oil pipe 20 is low, and the energy stored when the phase change material needs to be preheated by the engineering machinery is insufficient to play a role in preheating.
Example IV
The embodiment specifically provides a temperature control device of a hydraulic system, as shown in fig. 1, including an oil pipe 20 and a phase change material container 30;
the oil pipe 20 passes through the phase change material container 30 and one end of the oil pipe is connected with the hydraulic oil tank 10;
the oil pipe 20 is provided with a pipe wall 23 which can exchange heat with the phase change material;
the oil pipe 20 comprises an oil inlet 21 and an oil outlet 22, the oil inlet 21 is connected with the hydraulic oil tank 10, the oil outlet 22 is connected with the radiator, high-temperature oil in the hydraulic oil tank 10 is pumped by the oil pump and is input into the oil pipe 20, the high-temperature oil exchanges heat with the phase-change material in the phase-change material container 30 and reduces the temperature when passing through the phase-change material container 30 in the oil pipe 20, and the oil after the temperature reduction enters the radiator for further cooling treatment and returns to the hydraulic oil tank 10.
When the engineering machinery is preheated, low-temperature oil in the hydraulic oil tank 10 is pumped by an oil pump and is input into the oil pipe 20, when the low-temperature oil passes through the phase-change material container 30 in the oil pipe 20, the low-temperature oil exchanges heat with the phase-change material in the phase-change material container 30 and increases the temperature, and the oil with the increased temperature returns to the hydraulic oil tank 10.
The phase change material container 30 comprises a partition plate 31, the partition plate 31 divides the interior of the phase change material container 30 into a first space 301 and a second space 302, an overflow device 32 is arranged on the partition plate 31, and the overflow device 32 controls the phase change material to flow between the first space 301 and the second space 302.
The partition 31 divides the inside of the phase change material container 30 into a first space 301 and a second space 302, the oil pipe 20 may be disposed in the first space 301 or the second space 302, and the oil pipe 20 may be disposed in the first space 301 and the second space 302. Taking the example that the oil pipe 20 is arranged in the first space 301, the first space 301 is filled with the phase change material, when the oil with higher flowing temperature (more than 85 ℃) in the oil pipe 20, the granular phase change material absorbs heat and converts into a liquid form and expands outwards, and the phase change material changes into a granular form again after the temperature of the phase change material is reduced, and the phase change material circularly flows to realize the heat conversion.
The temperature control device further comprises a control device, the control device is connected with the overflow device 32, and the control device can control the overflow device 32 to open and close and control the overflow device 32 to control the phase change material to flow between the first space 301 and the second space 302.
The temperature control device further comprises a temperature detection device arranged outside the hydraulic system, and the control device is connected with the temperature detection device. The temperature detecting device is used for detecting the ambient temperature, and controlling the overflow device 32 to open and close through the control device, and controlling the overflow device 32 to control the phase change material to flow between the first space 301 and the second space 302. Therefore, the phase change material in the phase change material container 30 can fully play a heat dissipation function under the condition of high ambient temperature, and the phase change material can flow between the first space 301 and the second space 302 by controlling the overflow device 32 at proper time under the low-temperature environment, so that the phase change material can preheat hydraulic oil and a hydraulic system.
As shown in fig. 2, the overflow device 32 includes a first overflow device and a second overflow device, the first overflow device is a first check valve 321, the second overflow device is a second check valve 322, and the installation directions of the first check valve 321 and the second check valve 322 are opposite. The first check valve 321 controls the flow of the phase change material from the first space 301 to the second space 302, and the second check valve 322 controls the flow of the phase change material from the second space 302 to the first space 301.
The phase change material container 30 contains a phase change material with a phase change temperature of 75-85 ℃, a core material of the phase change material is paraffin, a wall material of the phase change material is melamine-urea formaldehyde resin, the core material also comprises nano graphene, nano silver and multi-wall carbon nano tubes, and the wall material and the core material of the phase change material are composite phase change microcapsules 34.
An insulation layer is arranged on the outer side of the phase change material container 30. The thermal insulation layer prevents ambient temperature and heat from the hydraulic system from affecting the phase change material in the phase change material container 30.
The phase change material plays roles of auxiliary heat dissipation and auxiliary preheating on the oil pipe 20, so that the problems of insufficient heat dissipation efficiency in a high-temperature environment and preheating requirement in a low-temperature environment of the conventional hydraulic system are solved.
Example five
The present embodiment provides a hydraulic system including a temperature control device including an oil pipe 20 and a phase change material container 30; the oil pipe 20 passes through the phase change material container 30 and one end of the oil pipe is connected with the hydraulic oil tank 10, and the oil pipe 20 is provided with a pipe wall 23 which can exchange heat with the phase change material; the phase change material container 30 comprises a partition plate 31, the partition plate 31 divides the interior of the phase change material container 30 into a first space 301 and a second space 302, an overflow device 32 is arranged on the partition plate 31, and the overflow device 32 controls the phase change material to flow between the first space 301 and the second space 302.
According to the hydraulic system provided by the embodiment, the phase change material container 30 is arranged on the oil pipe 20 between the hydraulic oil tank 10 and the radiator, the oil pipe 20 is provided with the pipe wall 23 capable of exchanging heat with the phase change material, and the phase change material plays roles of assisting in heat dissipation and assisting in preheating of the oil pipe 20, so that the problems that the existing hydraulic system is insufficient in heat dissipation efficiency in a high-temperature environment and needs to be preheated in a low-temperature environment are solved; further, the phase change material container 30 is divided into a first space 301 and a second space 302 by a partition 31, and the oil pipe 20 only passes through the first space 301 or the second space 302, and the flow of the phase change material between the first space 301 and the second space 302 is regulated by the overflow device 32, so that the heat dissipation efficiency or the heat absorption efficiency of the oil pipe 20 in the phase change material container 30 is controlled. In addition, the overflow device 32 is used for adjusting the phase change material to flow between the first space 301 and the second space 302, so that the endothermic phase change material can be stored in the adjacent space of the oil pipe 20, the inflow is controlled when the oil pipe 20 needs to absorb heat, the self-heating energy loss of the phase change material in a long-time storage environment is avoided, and the energy storage effect cannot be exerted due to insufficient energy storage of the phase change material when the engineering machinery is preheated.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (11)
1. The temperature control device of the hydraulic system is characterized by comprising an oil pipe and a phase change material container;
the oil pipe penetrates through the phase change material container and one end of the oil pipe is connected with the hydraulic oil tank, and the oil pipe is provided with a pipe wall for exchanging heat with the phase change material;
the phase change material container comprises a partition board, wherein the partition board divides the interior of the phase change material container into a first space and a second space, and an overflow device is arranged on the partition board and controls the phase change material to flow between the first space and the second space; the oil pipe passes through only one of the first space and the second space;
when the phase change material absorbs heat, the phase change material is converted into a liquid form from particles and expands outwards; the temperature is changed into particle form again after being reduced, and the circulating flow is realized, so that the heat conversion is realized.
2. The temperature control device of a hydraulic system of claim 1, further comprising a control device coupled to the overflow device.
3. The temperature control device of a hydraulic system according to claim 2, further comprising a temperature detection device disposed outside the hydraulic system, wherein the control device is coupled to the temperature detection device.
4. The temperature control device of a hydraulic system of claim 1, wherein the overflow device comprises a first overflow device and a second overflow device.
5. The temperature control device of a hydraulic system of claim 4, wherein the first overflow device is a first check valve and the second overflow device is a second check valve, and wherein the first check valve and the second check valve are mounted in opposite directions.
6. The temperature control device of a hydraulic system of claim 1, wherein the phase change material container houses a phase change material having a phase change temperature of 75 ℃ to 85 ℃.
7. The temperature control device of a hydraulic system of claim 6, wherein the core material of the phase change material is paraffin and the wall material of the phase change material is melamine-urea formaldehyde resin.
8. The temperature control device of claim 6, wherein the core material of the phase change material comprises nano graphene, nano silver, multi-walled carbon nanotubes.
9. The temperature control device of a hydraulic system of claim 6, wherein the wall material and the core material of the phase change material are composite phase change microcapsules.
10. The temperature control device of a hydraulic system according to claim 1, wherein an insulation layer is provided outside the phase change material container.
11. A hydraulic system comprising a temperature control device of the hydraulic system according to any one of claims 1-10.
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| CN110645233B (en) * | 2019-09-26 | 2021-10-01 | 台州市晶钻智能科技有限公司 | Hydraulic pressure station that radiating effect is good convenient to remove |
| CN111746869B (en) * | 2020-05-13 | 2021-08-27 | 浙江大学 | Storage and transportation device for special materials and storage and transportation method thereof |
| CN114046296B (en) * | 2021-11-08 | 2023-06-23 | 中国人民解放军火箭军工程大学 | Intelligent temperature control system of hydraulic oil tank and design method thereof |
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