CN111188811A - Hydraulic oil preheating device and engineering machinery - Google Patents

Hydraulic oil preheating device and engineering machinery Download PDF

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Publication number
CN111188811A
CN111188811A CN202010173890.1A CN202010173890A CN111188811A CN 111188811 A CN111188811 A CN 111188811A CN 202010173890 A CN202010173890 A CN 202010173890A CN 111188811 A CN111188811 A CN 111188811A
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CN
China
Prior art keywords
hydraulic oil
heat exchanger
communicated
exhaust pipe
preheating device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202010173890.1A
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Chinese (zh)
Inventor
漆道明
陈育
尹红兵
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Guangzhou Dahua Desheng Thermal Management Science And Technology Co ltd
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Guangzhou Dahua Desheng Thermal Management Science And Technology Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Guangzhou Dahua Desheng Thermal Management Science And Technology Co ltd filed Critical Guangzhou Dahua Desheng Thermal Management Science And Technology Co ltd
Priority to CN202010173890.1A priority Critical patent/CN111188811A/en
Publication of CN111188811A publication Critical patent/CN111188811A/en
Pending legal-status Critical Current

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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
    • F15B21/0427—Heating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/08—Other arrangements or adaptations of exhaust conduits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N5/00—Exhaust or silencing apparatus combined or associated with devices profiting by exhaust energy
    • F01N5/02—Exhaust or silencing apparatus combined or associated with devices profiting by exhaust energy the devices using heat
    • 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
    • F15B21/041—Removal or measurement of solid or liquid contamination, e.g. filtering
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/615—Filtering means
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/62—Cooling or heating means
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Analytical Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

The invention relates to a hydraulic oil preheating device and an engineering machine, comprising: the engine unit is used for outputting high-temperature tail gas; the heat exchanger is communicated with the engine unit; the cooling medium circulation assembly is communicated with the heat exchanger through the heat exchanger; and the hydraulic oil circulating assembly is communicated with the heat exchanger. The engine set is started firstly and continuously outputs high-temperature tail gas, the high-temperature tail gas firstly enters the heat exchanger to exchange heat with the cooling medium in the cooling medium circulating assembly, and the cooling medium absorbs heat and is heated and then flows into the heat exchanger; the heat exchanger can heat the hydraulic oil that flows in the higher coolant's of temperature heat to the hydraulic oil circulation subassembly and heat up, makes the temperature of hydraulic oil warm up rapidly and preheat, guarantees that hydraulic system can be comparatively rapid get into normal operating mode, avoids each components and parts among the hydraulic system to receive low temperature harm, ensures that engineering machine equipment reliably works under extreme low temperature environment.

Description

Hydraulic oil preheating device and engineering machinery
Technical Field
The invention relates to the technical field of mechanical equipment, in particular to a hydraulic oil preheating device and engineering machinery.
Background
At present, hydraulic oil is widely applied to various engineering mechanical equipment and is used in a hydraulic system to provide power. The optimum working temperature of the hydraulic oil is generally between 30 ℃ and 80 ℃, but when the temperature of the hydraulic oil is too low, the viscosity of the hydraulic oil is greatly increased, the flowing capacity is deteriorated, the working efficiency of a hydraulic system is directly reduced greatly, and parts such as a hydraulic motor, a valve pipeline and the like are easily damaged. Especially for engineering machinery equipment under the condition of extremely cold working conditions, hydraulic oil in a hydraulic system needs to be preheated before formal operation, and the engineering machinery equipment can be started to work after the oil temperature is increased to a proper temperature.
However, the currently used hydraulic oil preheating method is to preheat by using the cooling liquid of the engine, and the following defects are mainly existed: the coolant liquid that relies on the engine preheats because coolant liquid temperature itself is not high, causes hydraulic oil to preheat inefficiency, and is consuming time long, and engine warm-up time can be very long, greatly influences equipment efficiency of use and experience.
Disclosure of Invention
Based on this, it is necessary to provide a hydraulic oil preheating device and engineering machinery, and the purpose is to solve the problems that hydraulic oil preheating efficiency is low, time consumption is long, and reliable use of engineering machinery equipment is affected in the prior art.
The technical scheme is as follows:
on the one hand, this application provides a hydraulic oil preheating device, it includes:
the engine unit is used for outputting high-temperature tail gas;
a heat exchanger in communication with the engine block;
a cooling medium circulation assembly in communication with the heat exchanger through a heat exchanger; and
a hydraulic oil circulation assembly in communication with the heat exchanger.
The hydraulic oil preheating device is applied to various engineering mechanical equipment, and particularly guarantees preheating of hydraulic oil in a hydraulic system under extremely cold weather conditions. Specifically, before starting operation, an engine unit is started firstly and continuously outputs high-temperature tail gas, the high-temperature tail gas firstly enters a heat exchanger to exchange heat with a cooling medium in a cooling medium circulating assembly, and the cooling medium absorbs heat and is heated and then flows into the heat exchanger; the heat exchanger can heat the hydraulic oil that flows in the higher coolant's of temperature heat to the hydraulic oil circulation subassembly and heat up, makes the temperature of hydraulic oil warm up rapidly and preheat, guarantees that hydraulic system can be comparatively rapid get into normal operating mode, avoids each components and parts among the hydraulic system to receive low temperature harm, ensures that engineering machine equipment reliably works under extreme low temperature environment. The device can make full use of the engine produce the high temperature used heat of tail gas, improves hydraulic oil greatly and preheats efficiency, reduces and preheats consuming time and warm-up time, promotes engineering mechanical equipment's work efficiency and uses and experiences.
The technical solution of the present application is further described below:
in one embodiment, the cooling medium circulation assembly comprises a water pump, a first pipeline, a second pipeline and a third pipeline, wherein the cold side outlet of the heat exchanger is communicated with the hot side inlet of the heat exchanger through the first pipeline, the hot side outlet of the heat exchanger is communicated with the water inlet of the water pump through the second pipeline, and the water outlet of the water pump is communicated with the cold side inlet of the heat exchanger through the third pipeline.
In one embodiment, the hydraulic oil circulation assembly comprises a hydraulic oil tank, an oil pump, a fourth pipeline, a fifth pipeline and a sixth pipeline, an oil outlet of the hydraulic oil tank is communicated with an oil inlet of the oil pump through the fourth pipeline, an oil outlet of the oil pump is communicated with a cold side inlet of the heat exchanger through the fifth pipeline, and a cold side outlet of the heat exchanger is communicated with an oil return port of the hydraulic oil tank through the sixth pipeline.
In one embodiment, the hydraulic oil preheating device further comprises an oil temperature sensor and a controller, the oil temperature sensor is communicated with the fourth pipeline, and the oil temperature sensor, the oil pump and the water pump are electrically connected with the controller through wiring harnesses respectively.
In one embodiment, a pre-filter is communicated with the fourth pipeline.
In one embodiment, the engine unit comprises an engine, a front exhaust pipe and a rear exhaust pipe, one end of the front exhaust pipe is communicated with an exhaust port of the engine, the other end of the front exhaust pipe is communicated with a hot side inlet of the heat exchanger, and a hot side outlet of the heat exchanger is communicated with the rear exhaust pipe.
In one embodiment, the engine block further comprises a muffler, and the muffler is communicated with the front-section exhaust pipe.
In one embodiment, the engine block further includes a first solenoid valve electrically connected to the controller, and the first solenoid valve is communicated with the front exhaust pipe and is located between the muffler and a hot side inlet of the heat exchanger.
In one embodiment, the engine block further includes a side exhaust pipe and a second solenoid valve electrically connected to the controller, the second solenoid valve is connected to the side exhaust pipe, one end of the side exhaust pipe is connected to the front exhaust pipe, and the other end of the side exhaust pipe is connected to the rear exhaust pipe.
In addition, the application also provides engineering machinery which comprises the hydraulic oil preheating device.
Drawings
Fig. 1 is a schematic structural diagram of a hydraulic oil preheating device according to an embodiment of the present invention.
Description of reference numerals:
10. an engine block; 11. an engine; 12. a front exhaust pipe; 13. a rear exhaust pipe; 14. a muffler; 15. a first solenoid valve; 16. a side exhaust pipe; 17. a second solenoid valve; 20. a heat exchanger; 30. a cooling medium circulation assembly; 31. a water pump; 32. a first pipeline; 33. a second pipeline; 34. a third pipeline; 40. a heat exchanger; 50. a hydraulic oil circulation assembly; 51. a hydraulic oil tank; 52. an oil pump; 53. a fourth pipeline; 54. a fifth pipeline; 55. a sixth pipeline; 60. an oil temperature sensor; 70. and a controller.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and the detailed description. It should be understood that the detailed description and specific examples, while indicating the scope of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.
It will be understood that when an element is referred to as being "secured to," "disposed on" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present; the specific manner of fixedly connecting one element to another element can be implemented by the prior art, and will not be described herein, and preferably, a screw-threaded connection is used.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
The embodiment of the application provides a construction machine which can be but is not limited to a construction machine, a mining machine, a metallurgical machine and the like. Taking a construction machine as an excavator as an example, the excavator is provided with a hydraulic system for providing power for the extension and contraction of an excavator arm so as to assist the excavator bucket in operation.
The working medium of the hydraulic system is hydraulic oil, and because the viscosity of the hydraulic oil increases along with the temperature reduction, when the excavator works in cold winter or even in an extremely cold climate condition area, a hydraulic oil preheating device needs to be assembled for the hydraulic system in order to avoid the influence of low temperature on the fluidity of the hydraulic oil.
As shown in fig. 1, a hydraulic oil preheating device according to an embodiment of the present application includes: the engine unit 10, the heat exchanger 20, the cooling medium circulation assembly 30 and the hydraulic oil circulation assembly 50. The engine unit 10 is a power source of the engineering machinery, and the engine unit 10 can output high-temperature tail gas after being started. Generally speaking, the temperature of the exhaust gas of the engine 11 can reach up to 600 ℃ to 700 ℃, so that sufficient temperature is provided for heating the hydraulic oil and the cooling medium.
The heat exchanger 20 is in communication with the engine block 10; the cooling medium circulation assembly 30 communicates with the heat exchanger 20 through a heat exchanger 40; the hydraulic oil circulation assembly 50 is in communication with the heat exchanger 40. Wherein the heat exchanger 20 and the heat exchanger 40 may be any type of heat exchange device known in the art, and specifically, the heat exchanger 20 may be, but is not limited to, a pin tube heat exchanger 20; the heat exchanger 40 may be, but is not limited to, a shell and tube heat exchanger 40.
In summary, the implementation of the technical solution of the present embodiment has the following beneficial effects: the hydraulic oil preheating device is applied to various engineering mechanical equipment, and particularly guarantees preheating of hydraulic oil in a hydraulic system under extremely cold weather conditions. Specifically, before starting up, the engine unit 10 is started up first and continuously outputs high-temperature exhaust gas, the high-temperature exhaust gas firstly enters the heat exchanger 20 to exchange heat with the cooling medium in the cooling medium circulation assembly 30, and the cooling medium absorbs heat and is heated up and then flows into the heat exchanger 40; the heat exchanger 40 heats the hydraulic oil flowing in the hydraulic oil circulation assembly 50 by using the heat of the cooling medium with higher temperature, so that the temperature of the hydraulic oil can be rapidly raised and preheated, the hydraulic system can rapidly enter a normal working condition, the components in the hydraulic system are prevented from being damaged by low temperature, and the engineering mechanical equipment can reliably work in an extremely low temperature environment. The device can make full use of the engine 11 high temperature used heat that produces tail gas, improves hydraulic oil greatly and preheats efficiency, reduces to preheat consuming time and warm-up time, promotes engineering mechanical equipment's work efficiency and uses and experience.
With continued reference to fig. 1, the cooling medium circulating through the cooling medium circulation assembly 30 may be a fluid material such as oil or water. In one embodiment, the cooling medium circulation assembly 30 includes a water pump 31, a first pipe 32, a second pipe 33, and a third pipe 34, the cold side outlet of the heat exchanger 20 communicates with the hot side inlet of the heat exchanger 40 through the first pipe 32, the hot side outlet of the heat exchanger 40 communicates with the water inlet of the water pump 31 through the second pipe 33, and the water outlet of the water pump 31 communicates with the cold side inlet of the heat exchanger 20 through the third pipe 34. The water flowing into the heat exchanger 40 through the third pipeline 34 can be heated by the high-temperature tail gas; the heated water flows back into the heat exchanger 40 through the first pipeline 32 to provide a heat source for heating and preheating the hydraulic oil. And the water with temperature drop after heating the hydraulic oil can flow back to the water pump 31 to realize cyclic utilization, so that the resource utilization rate is improved.
With reference to fig. 1, the hydraulic oil circulation assembly 50 includes a hydraulic oil tank 51, an oil pump 52, a fourth pipeline 53, a fifth pipeline 54 and a sixth pipeline 55, an oil outlet of the hydraulic oil tank 51 is communicated with an oil inlet of the oil pump 52 through the fourth pipeline 53, an oil outlet of the oil pump 52 is communicated with a cold side inlet of the heat exchanger 40 through the fifth pipeline 54, and a cold side outlet of the heat exchanger 40 is communicated with an oil return port of the hydraulic oil tank 51 through the sixth pipeline 55. The hydraulic oil tank 51 is a device that stores and supplies hydraulic oil. The hydraulic oil can continuously flow into the heat exchanger 40 under the action of the driving force of the oil pump 52, and then the hydraulic oil can exchange heat with the water after temperature rise in the heat exchanger 40, so that the temperature of the hydraulic oil is raised to achieve the purpose of preheating, and the hydraulic system can also quickly respond and reliably work in an extremely cold temperature environment.
Referring to fig. 1, in a further embodiment, the hydraulic oil preheating device further includes an oil temperature sensor 60 and a controller 70, the oil temperature sensor 60 is connected to the fourth pipeline 53, and the oil temperature sensor 60, the oil pump 52 and the water pump 31 are electrically connected to the controller 70 through a wire harness, respectively. The oil temperature sensor 60 can detect the temperature of the hydraulic oil flowing out of the hydraulic oil tank 51 in real time, the temperature of the hydraulic oil is continuously raised, and the temperature data is transmitted to the controller 70 in real time; when the temperature value received by the controller 70 at a certain time is equal to or exceeds the preset temperature threshold, it represents that the current hydraulic oil temperature in the hydraulic system meets the use requirement, and the viscosity of the hydraulic oil is proper so as to ensure normal flow. At this time, the controller 70 will output an instruction to control the oil pump 52 and the water pump 31 to stop working, so as to achieve the purpose of energy saving and consumption reduction.
Considering that during working year after year, the deterioration of hydraulic oil, the corrosion of the wall of the hydraulic oil tank 51 and the like can cause particle impurities in the hydraulic oil, and if the impurities flow into the oil pump 52, the oil pump 52 is easily blocked and damaged. Based on this, in an embodiment, a pre-filter is further communicated with the fourth pipeline 53. Preferably, a pre-filter is arranged between the hydraulic oil tank 51 and the oil pump 52. The filter can effectively filter impurities in the hydraulic oil flowing into the oil pump 52, thereby avoiding the problems and ensuring the safe and reliable operation of the preheating device and the hydraulic system. Alternatively, the prefilter may be any type of filtration device known in the art, such as, but not limited to, a screen, a membrane, a cartridge, etc.
Referring to fig. 1, in an embodiment, the engine unit 10 includes an engine 11, a front exhaust pipe 12 and a rear exhaust pipe 13, one end of the front exhaust pipe 12 is communicated with an exhaust port of the engine 11, the other end of the front exhaust pipe 12 is communicated with a hot side inlet of the heat exchanger 20, and a hot side outlet of the heat exchanger 20 is communicated with the rear exhaust pipe 13. High-temperature tail gas generated after the engine 11 is started flows into the heat exchanger 20 through the front-section exhaust pipe 12, and heat exchange and heating can be realized on water synchronously flowing into the heat exchanger 20, so that the water can be rapidly heated to preheat hydraulic oil by enough heat. And the tail gas after temperature reduction can be introduced into the external environment through the rear section exhaust pipe 13, so that the normal work of the engine 11 is ensured. The heat of the high-temperature tail gas in the process can be fully utilized, and the energy utilization rate is greatly improved.
Furthermore, the engine unit 10 further includes a muffler 14, and the muffler 14 is communicated with the front exhaust pipe 12. The muffler 14 can effectively reduce the noise generated by the flow of the high-temperature and high-flow-rate tail gas in the front-section exhaust pipe 12, so that the noise reduction and silencing work of the engine 11 are realized, and the use experience of a user is improved. It should be noted that the above-mentioned muffler 14 may be any type or operation principle of the muffler 14 product in the prior art, and is not limited in detail herein.
With continued reference to fig. 1, in order to turn on or off the exhaust gas flowing into the heat exchanger 20 or control the flow rate of the input exhaust gas, the engine unit 10 further includes a first electromagnetic valve 15 electrically connected to the controller 70, wherein the first electromagnetic valve 15 is communicated with the front exhaust pipe 12 and is located between the muffler 14 and the hot side inlet of the heat exchanger 20.
Further, the engine unit 10 further includes a side exhaust pipe 16 and a second solenoid valve 17 electrically connected to the controller 70, the second solenoid valve 17 being communicated with the side exhaust pipe 16, one end of the side exhaust pipe 16 being communicated with the front-stage exhaust pipe 12, and the other end of the side exhaust pipe 16 being communicated with the rear-stage exhaust pipe 13. When the temperature of the hydraulic oil rises to a preset temperature value, and the first electromagnetic valve 15 is closed, the second electromagnetic valve 17 can be controlled by the controller 70 to be opened, and the tail gas can be continuously discharged to the outside of the equipment from the side exhaust pipe 16, so that the normal work of the engineering machinery is ensured. In addition, when being in the hydraulic oil stage of preheating, through the aperture of control second solenoid valve 17, can also assist first solenoid valve 15 to adjust the exhaust flow who gets into in heat exchanger 20, and then the regulation and control is used for heating the heat of hydraulic oil, guarantees that hydraulic oil preheats the efficiency.
The first solenoid valve 15 and the second solenoid valve 17 may be any type or operation principle of solenoid valve products in the prior art. The controller 70 may be, but is not limited to, a PLC, a micro-controller computer, or the like.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (10)

1. A hydraulic oil preheating device, characterized by, includes:
the engine unit is used for outputting high-temperature tail gas;
a heat exchanger in communication with the engine block;
a cooling medium circulation assembly in communication with the heat exchanger through a heat exchanger; and
a hydraulic oil circulation assembly in communication with the heat exchanger.
2. The hydraulic oil preheating device according to claim 1, wherein the cooling medium circulation assembly includes a water pump, a first pipe, a second pipe, and a third pipe, a cold side outlet of the heat exchanger communicates with a hot side inlet of the heat exchanger through the first pipe, a hot side outlet of the heat exchanger communicates with a water inlet of the water pump through the second pipe, and a water outlet of the water pump communicates with the cold side inlet of the heat exchanger through the third pipe.
3. The hydraulic oil preheating device according to claim 2, wherein the hydraulic oil circulation assembly includes a hydraulic oil tank, an oil pump, a fourth pipeline, a fifth pipeline, and a sixth pipeline, an oil outlet of the hydraulic oil tank is communicated with an oil inlet of the oil pump through the fourth pipeline, an oil outlet of the oil pump is communicated with a cold side inlet of the heat exchanger through the fifth pipeline, and a cold side outlet of the heat exchanger is communicated with an oil return port of the hydraulic oil tank through the sixth pipeline.
4. The hydraulic oil preheating device according to claim 3, further comprising an oil temperature sensor and a controller, wherein the oil temperature sensor is communicated with the fourth pipeline, and the oil temperature sensor, the oil pump and the water pump are electrically connected with the controller through a wire harness, respectively.
5. The hydraulic oil preheating device according to claim 3, wherein a pre-filter is further communicated in the fourth pipeline.
6. The hydraulic oil preheating device according to claim 4, wherein the engine unit includes an engine, a front exhaust pipe and a rear exhaust pipe, one end of the front exhaust pipe is communicated with an exhaust port of the engine, the other end of the front exhaust pipe is communicated with a hot side inlet of the heat exchanger, and a hot side outlet of the heat exchanger is communicated with the rear exhaust pipe.
7. The hydraulic oil preheating device according to claim 6, wherein the engine block further includes a muffler, and the muffler is communicated with the front-stage exhaust pipe.
8. The hydraulic oil preheating device according to claim 7, wherein the engine block further includes a first solenoid valve electrically connected to the controller, and the first solenoid valve is communicated with the front-stage exhaust pipe and is located between the muffler and a hot-side inlet of the heat exchanger.
9. The hydraulic oil preheating device according to claim 8, wherein the engine block further includes a side exhaust pipe and a second solenoid valve electrically connected to the controller, the second solenoid valve is connected to the side exhaust pipe, one end of the side exhaust pipe is connected to the front exhaust pipe, and the other end of the side exhaust pipe is connected to the rear exhaust pipe.
10. A working machine, characterized by comprising a hydraulic oil preheating device according to any one of claims 1 to 9.
CN202010173890.1A 2020-03-13 2020-03-13 Hydraulic oil preheating device and engineering machinery Pending CN111188811A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010173890.1A CN111188811A (en) 2020-03-13 2020-03-13 Hydraulic oil preheating device and engineering machinery

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010173890.1A CN111188811A (en) 2020-03-13 2020-03-13 Hydraulic oil preheating device and engineering machinery

Publications (1)

Publication Number Publication Date
CN111188811A true CN111188811A (en) 2020-05-22

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CN202010173890.1A Pending CN111188811A (en) 2020-03-13 2020-03-13 Hydraulic oil preheating device and engineering machinery

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CN (1) CN111188811A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112096699A (en) * 2020-09-17 2020-12-18 上海三一重机股份有限公司 Hydraulic oil heat exchange system and excavator
CN112757595A (en) * 2020-12-21 2021-05-07 衷俊 PET bottle embryo mould

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112096699A (en) * 2020-09-17 2020-12-18 上海三一重机股份有限公司 Hydraulic oil heat exchange system and excavator
CN112757595A (en) * 2020-12-21 2021-05-07 衷俊 PET bottle embryo mould

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