CN201288351Y - Automatic high-efficiency cooling system of digger hydraulic-oil - Google Patents
Automatic high-efficiency cooling system of digger hydraulic-oil Download PDFInfo
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- CN201288351Y CN201288351Y CNU2008201404873U CN200820140487U CN201288351Y CN 201288351 Y CN201288351 Y CN 201288351Y CN U2008201404873 U CNU2008201404873 U CN U2008201404873U CN 200820140487 U CN200820140487 U CN 200820140487U CN 201288351 Y CN201288351 Y CN 201288351Y
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- excavator
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Abstract
An hydraulic oil automatic high efficiency heat dissipation system for excavator comprises hydraulic transmission system consisting of hydraulic fuel tank, hydraulic pump and work apparatus and connected pipelines, refrigeration system including a compressor, a condenser, a drier, throttling capillary and a tubular type evaporator sequentially connected by pipelines, temperature sensor and automatic temperature control device. A tubular type heat exchanger is provided at pipeline between hydraulic transmission system and hydraulic fuel tank; the tubular type heat exchanger is connected with tubular type evaporator via fan housing; tubular type evaporator is provided with refrigerating fan at outside. The high efficiency heat dissipation system of the utility has characteristics of a simple structure, convenient operation, quick and highly effective refrigeration, which ensures high efficiency operation of hydraulic transmission system for excavator and prolongs service life of excavator.
Description
Technical field
The utility model relates to the hydraulic system of excavator, particularly has the excavator hydraulic system of quick heat radiating function.
Background technology
Full hydraulic excavator is a kind of broad-spectrum engineering machinery.It is that medium is realized power conversion with hydraulic oil.So the quality requirements to hydraulic oil is quite high.Hydraulic oil is for excavator hydraulic system: be sliding agent be again coolant.Hydraulic oil has a lot of important characteristics, the most important thing is viscosity.Hydraulic oil viscosity changes with the variation of oil temperature, oily temperature rise, and after viscosity descended, fluid made the oil film breakdown at each movable position through hydraulic system, and frictional force increases, and causes system's heating, and thermal expansion is excessive, and leaking increases.Cause operating rate slow, the complete machine operating efficiency obviously descends.
According to the data introduction: when hydraulic oil temperature surpasses 55 ℃, fluid oxidation aggravation, shorten application life, at this moment, if 9 ℃ of warm every risings of oil, can shorten half the application life of oil, viscosity is almost lost, lubricity reduces greatly, thereby causes whole hydraulic system aggravation wearing and tearing, shortens excavator application life.This shows the complete machine performance of hydraulic oil cooling system and excavator and crucial relation is arranged application life.
At present, excavator hydraulic pressure cooling system adopts air-cooled: use the engine blower air draught, the wind-force outside making is blown over hydraulic oil radiator and is cooled off hydraulic oil.Radiating mode DeGrain like this.Because hydraulic oil radiator leans against engine radiator, is subjected to engine radiator conduction of heat and external working environment thermal convection current and thermal-radiating the influence, especially when working environment surpassed 30 ℃, its heat radiation cooling effect was very undesirable.
At the problems referred to above, the inventor proposes the technical scheme (ZL200720078784.5) of " the automatical and efficient cooling system of excavator hydraulic oil ", one section coil pipe in the hydraulic circuit is arranged in the cooler bin, the evaporimeter of compressor refrigeration system is set in the cooler bin simultaneously, cools off the hydraulic oil of hydraulic circuit by the cold of evaporimeter.In the model machine actual fabrication, remain in the still dissatisfactory problem of refrigeration.
The utility model content
The purpose of this utility model is to provide the automatic quick heat radiating of a kind of excavator hydraulic oil system at the problem of prior art existence, further improves the hydraulic oil specific heat load, makes radiating effect better.
This novel purpose is realized by the following technical programs: the automatical and efficient cooling system of a kind of excavator hydraulic oil, comprise the Hydraulic Power Transmission System of forming by the road by hydraulic oil container, hydraulic pump and equipment, and the refrigeration system that connects to form in turn by the road by compressor, condenser, dryer, throttle capillary tube and tubular evaparator, temperature pick up and automatic temperature control also are provided with pipe heat exchanger on the pipeline in the Hydraulic Power Transmission System between equipment and the hydraulic oil container; Also be connected with fan housing between pipe heat exchanger and the described tubular evaparator, and the tubular evaparator outer setting there is refrigerating fan.
This is novel to install one additional to the hydraulic oil refrigerating plant, the Refrigeration Technique that this refrigerating plant adopts existing air-conditioning of fast cooling in short-term in the existing Hydraulic Power Transmission System of excavator.Evaporimeter can adopt tubular evaparator (steel pipe that curves U-shaped is fixed on the in type metal framework), fin tubular evaparator (being formed by the tube bending that has fin) or fin pipe-coil type evaporator, simultaneously, a pipe heat exchanger is set in the hydraulic oil pipeline, hydraulic oil flow is in heat exchange tube, and a fan housing is set between evaporimeter and pipe heat exchanger, fan housing the place ahead is provided with fan.
During excavator work, hydraulic oil circulates in fluid pressure line, when being lower than, hydraulic fluid temperature sets the control point, during as 55 ℃ (by temperature sensor monitors, setting the control point can be provided with voluntarily according to actual conditions), the compressor of refrigerating plant can not get power supply, and compressor is in halted state, and whole refrigerating plant is not worked; When the temperature of hydraulic oil rises to the setting control point, when reaching 55 ℃ as oily temperature (according to investigations, under the excavator normal operation, the temperature of hydraulic oil is between 60-80 ℃), the control circuit of automatic temperature control (be made up of temperature pick up and control circuit etc., belong to prior art) is to the electromagnetic clutch energising and start fan, electromagnetic clutch engages, compressor is rotated, promptly start refrigerating plant, the cold-producing medium cyclic process is as follows:
High-temperature high-pressure refrigerant (as F-12) liquid from condenser, the dryer of flowing through, reduce pressure by throttle capillary tube again, temperature also decreases, then, enter the evaporimeter heat absorption, and hurried boiling, after becoming low-temperature low-pressure refrigerant steam, sucked by compressor, and be compressed into high-temperature high-pressure refrigerant steam and enter condenser, emit the heat and compressor consumption heat that external work produced that absorbs by evaporimeter at the condenser place after, become the normal temperature high voltage refrigerant liquid, the dryer of flowing through again, hair suction pipe form kind of refrigeration cycle.Thereby evaporimeter produces cold, the cold of evaporimeter is forced cooling through fan to the hydraulic oil of the pipe heat exchanger of flowing through, hydraulic oil is lowered the temperature rapidly, and return to normal temperature range (after recovering normal temperature, automaton shuts down compressor, return to normal), excavator is able to operate as normal.
With this novel beneficial effect that is had compared to existing technology be:
1, adopts Technology of Compressor Refrigeration, and employing fan forced circulation, hydraulic oil exchanges through heat exchange of heat pipe (heat exchange area is big) simultaneously, the cooling that makes hydraulic oil more rapidly, more efficient, can guarantee that hydraulic oil is in the normal temperature range all the time, guarantee the excavator operate as normal, prolong the application life of excavator hydraulic system.
(cold-producing medium can be selected the cycloalkanes cold-producing medium of existing green refrigeration use in refrigerator for use to refrigerating plant by automatic temperature control control; preferably do not adopt freon (as R12); damage with protection atmospheric ozone layer and being unlikely); can finish refrigeration to hydraulic oil rapidly, guarantee that excavator hydraulic system is working properly.
As, Hitachi's 240 excavators (132 kilowatts in motor), 2000 rev/mins of maximum speeds, 2 * 224 liters/minute of hydraulic pump (embolism pump) maximum stream flows.The flow of hydraulic oil is big, and flow velocity is fast.When the environment temperature number is high (as above 30 ℃), only depend on the thermolysis of existing air-cooled radiator far can not reach requirement.And adopt this novel, and can freeze rapidly, quicken hydraulic oil is implemented cooling, and keep the optimum working temperature of hydraulic oil, make excavator be in normal operating conditions all the time.
2, this new structure simple, implement easily, convenient, do not need existing excavator cooling system is carried out big change, then can solve the problem of hydraulic system long-term safety operation.
Description of drawings
Fig. 1 is an excavator hydraulic oil pipe system schematic diagram;
Fig. 2 is the schematic diagram of compressor refrigeration system;
Fig. 3 is the structure chart that pipe heat exchanger shown in Figure 1 and tubular evaparator shown in Figure 2 make up through fan housing;
Fig. 4 is the left view (from mid-sectional) of pipe heat exchanger shown in Figure 3.
The specific embodiment
Fig. 1 Fig. 2 illustrates, this novel comprising by hydraulic oil container 1, the Hydraulic Power Transmission System that hydraulic pump 2 and equipment 3 and air-cooled radiator 4 (existing in the hydraulic circuit) are formed by the road, and by compressor 7, condenser 8, dryer 9, the refrigeration system that throttle capillary tube 10 and tubular evaparator 11 connect to form by the road in turn is (referring to Fig. 2, can establish a cover refrigeration system separately, also can utilize existing refrigeration system on the existing excavator, only need set up a tubular evaparator 11 in addition, in parallel with original evaporimeter, promptly by threeway with two evaporimeter parallel connections), temperature pick up (circle among Fig. 1 is represented) and automatic temperature control also are provided with pipe heat exchanger 5 on the pipeline in the Hydraulic Power Transmission System between equipment 3 and the hydraulic oil container 1; Among Fig. 3, also be connected with fan housing 6 between pipe heat exchanger 5 and the described tubular evaparator 11, and tubular evaparator 11 outer setting there is refrigerating fan 12.Arrow is represented the air-flow direction that fan produces among Fig. 3.Automatic temperature control starts refrigerating fan simultaneously when starting compressor.
Automatic temperature control adopts a temperature control equipment of being made up of temperature pick up (placing hydraulic oil pipeline, to the hydraulic oil temperature sampling) and controller (be used for when design temperature compressor and fan being powered, make compressor and fan running work).
Claims (4)
1, the automatical and efficient cooling system of a kind of excavator hydraulic oil, comprise the Hydraulic Power Transmission System of forming by the road by hydraulic oil container (1), hydraulic pump (2) and equipment (3), and the refrigeration system that connects to form in turn by the road by compressor (7), condenser (8), dryer (9), throttle capillary tube (10) and tubular evaparator (11), temperature pick up and automatic temperature control is characterized in that: also be provided with pipe heat exchanger (5) on the pipeline between equipment in the described Hydraulic Power Transmission System (3) and the hydraulic oil container (1); Also be connected with fan housing (6) between pipe heat exchanger (5) and the described tubular evaparator (11), and tubular evaparator (11) outer setting there is refrigerating fan (12).
2, according to the automatical and efficient cooling system of the described excavator hydraulic oil of claim 1, it is characterized in that: described pipe heat exchanger (5) and tubular evaparator (11) be shaped as rectangle, fan housing (6) be shaped as tetragonous cone table shape.
3, according to the automatical and efficient cooling system of the described excavator hydraulic oil of claim 2, it is characterized in that: described pipe heat exchanger has oil-in and oil-out on (5), many flat tubes be set in parallel in the heat exchanger framework and be communicated with into and out of hydraulic fluid port.
4, according to claim 1 or the automatical and efficient cooling system of the described excavator hydraulic oil of 2 or 3 arbitrary claims, it is characterized in that: described tubular evaparator (11) is a finned tube evaporator; Be provided with adiabator layer (6a) in the interlayer of fan housing (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201404873U CN201288351Y (en) | 2008-09-24 | 2008-09-24 | Automatic high-efficiency cooling system of digger hydraulic-oil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201404873U CN201288351Y (en) | 2008-09-24 | 2008-09-24 | Automatic high-efficiency cooling system of digger hydraulic-oil |
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| Publication Number | Publication Date |
|---|---|
| CN201288351Y true CN201288351Y (en) | 2009-08-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNU2008201404873U Expired - Fee Related CN201288351Y (en) | 2008-09-24 | 2008-09-24 | Automatic high-efficiency cooling system of digger hydraulic-oil |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103016463A (en) * | 2013-01-09 | 2013-04-03 | 山西三元煤业股份有限公司 | Refrigeration system of hydraulic oil tank |
| CN103459726A (en) * | 2011-03-15 | 2013-12-18 | 日立建机株式会社 | Construction machine |
| CN104847745A (en) * | 2014-07-30 | 2015-08-19 | 北汽福田汽车股份有限公司 | Hydraulic oil cooling system and engineering machinery having same |
| CN106284474A (en) * | 2016-09-23 | 2017-01-04 | 广西玉柴重工有限公司 | A kind of hydraulic crawler excavator quiet explosion-proof air-conditioner system |
| CN107237681A (en) * | 2017-08-15 | 2017-10-10 | 桂林航天工业学院 | A kind of remarkable radiator of temperature reduction performance |
| CN114670247A (en) * | 2022-04-20 | 2022-06-28 | 江苏徐工工程机械研究院有限公司 | Cooling system of forcible entry robot and forcible entry robot |
-
2008
- 2008-09-24 CN CNU2008201404873U patent/CN201288351Y/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103459726A (en) * | 2011-03-15 | 2013-12-18 | 日立建机株式会社 | Construction machine |
| CN103459726B (en) * | 2011-03-15 | 2016-06-01 | 日立建机株式会社 | Engineering machinery |
| CN103016463A (en) * | 2013-01-09 | 2013-04-03 | 山西三元煤业股份有限公司 | Refrigeration system of hydraulic oil tank |
| CN104847745A (en) * | 2014-07-30 | 2015-08-19 | 北汽福田汽车股份有限公司 | Hydraulic oil cooling system and engineering machinery having same |
| CN106284474A (en) * | 2016-09-23 | 2017-01-04 | 广西玉柴重工有限公司 | A kind of hydraulic crawler excavator quiet explosion-proof air-conditioner system |
| CN106284474B (en) * | 2016-09-23 | 2018-05-22 | 广西玉柴重工有限公司 | A kind of mute explosion-proof air-conditioner system of hydraulic crawler excavator |
| CN107237681A (en) * | 2017-08-15 | 2017-10-10 | 桂林航天工业学院 | A kind of remarkable radiator of temperature reduction performance |
| CN114670247A (en) * | 2022-04-20 | 2022-06-28 | 江苏徐工工程机械研究院有限公司 | Cooling system of forcible entry robot and forcible entry robot |
| CN114670247B (en) * | 2022-04-20 | 2023-12-08 | 江苏徐工工程机械研究院有限公司 | Broken cooling system who tears robot open and tear robot open |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090812 |