CN109883744A - A kind of device and method for excavator thermal equilibrium analysis - Google Patents
A kind of device and method for excavator thermal equilibrium analysis Download PDFInfo
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- CN109883744A CN109883744A CN201910133227.6A CN201910133227A CN109883744A CN 109883744 A CN109883744 A CN 109883744A CN 201910133227 A CN201910133227 A CN 201910133227A CN 109883744 A CN109883744 A CN 109883744A
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- excavator
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Abstract
The invention discloses a kind of device and methods for excavator thermal equilibrium analysis, comprising: excavator dynamical system, hand-operated direction valve, electric ratiomotor, hydraulic dynamometer machine, unidirectional electric proportional differential pressure regulating device and repairing pump motor group；In the front end of excavator dynamical system, hand-operated direction valve is set；In the front end of hand-operated direction valve, electric ratiomotor is set；The unidirectional electric proportional differential pressure regulating device of setting in the left side of electric ratiomotor；The electricity ratiomotor is respectively arranged with repairing mouth and drain tap；Hydraulic dynamometer machine is connected in the output shaft rear end of electric ratiomotor；Repairing pump motor group is set at the repairing mouth and drain tap of electric ratiomotor.The present apparatus can simulate actual loading indoors, and it is loaded by hydraulic dynamometer machine to engine and adjusts water cycle cooling system, oily cycle cooling system is adjusted to oil circuit load by proportional differential pressure device, and data acquired according to sensor, the complete machine thermal balance performance of excavator is analyzed.
Description
Technical field
The present invention relates to excavator stem heat balance technique fields, more particularly, to a kind of dress for excavator thermal equilibrium analysis
It sets and method.
Background technique
For existing hydraulic crawler excavator because of the complicated multiplicity of operating condition, use environment is severe, and it is inclined all to there is water temperature in use
The problems such as high, water temperature alarm, hydraulic oil temperature overheat, especially in summer, hydraulic crawler excavator easily causes under continuous work to be started
Machine boils, and hydraulic system element leakage causes situations such as slow in one's movements, operating efficiency is low or even cannot work.Excavator thermal balance
Test method, it is national currently without corresponding national or industry standard, each excavator enterprise, due to hydraulic excavating at us
The reasons such as the understanding shortcoming of machine hydraulic system heat dissipation performance importance and equipment, technology, expense, cause hydraulic crawler excavator thermal balance
Test cannot be widely applied, and the design of hydraulic crawler excavator cooling system still relies on the experience of designer mostly, at all
The quality of hydraulic crawler excavator heat dissipation performance can not accurately be grasped.
Summary of the invention
The purpose of the present invention is to provide a kind of device and methods for excavator thermal equilibrium analysis.
To achieve the above object, the present invention uses the following contents:
A kind of device and method for excavator thermal equilibrium analysis, comprising: excavator dynamical system, hand-operated direction valve,
Electric ratiomotor, hydraulic dynamometer machine, unidirectional electric proportional differential pressure regulating device and repairing pump motor group；In the excavator dynamical system
Hand-operated direction valve is set at the oil pump out of the mouth of system；In the front end of the hand-operated direction valve, electric ratiomotor is set；In the electricity
Unidirectional electric proportional differential pressure regulating device is set at the oil inlet of ratiomotor；It is described electricity ratiomotor be respectively arranged with repairing mouth and
Drain tap；Hydraulic dynamometer machine is connected on the output shaft of the electricity ratiomotor；The electric ratiomotor repairing mouth and let out
Repairing pump motor group is arranged in oil port.
Preferably, it is arranged A, B mouthfuls in the front end of the hand-operated direction valve；The A mouth of the hand-operated direction valve connects electric ratio
The oil inlet of example motor, the B mouth of hand-operated direction valve connect the oil outlet of electric ratiomotor, in the A mouth and electric ratio of hand-operated direction valve
Unidirectional electric proportional differential pressure regulating device is provided between the oil inlet of example motor；In the unidirectional electric proportional differential pressure regulating device
No.1 check valve and No. two check valves and flowmeter are respectively set on import and export pipeline；The electricity ratiomotor and slippage pump electricity
By an oil line pipe connection between unit, and height is respectively arranged on the oil line pipe of the front end of repairing pump motor group
Press through filter and pressure pipe；Pressure gauge and overflow valve are respectively arranged in the two sides of the pressure pipe.
Preferably, the excavator dynamical system includes digger engine, hydraulic pump, fuel tank and water tank；The digging
Pick machine engine is connect with hydraulic pump；The inlet port of the hydraulic pump connects fuel tank；The oil outlet connection of the hydraulic pump is manual
Reversal valve；Water tank is installed on the digger engine.
Preferably, safety valve is set on the oil line pipe of the oil outlet of the hydraulic pump.
Preferably, water circulation heat radiation device and multiple temperature sensors are provided on the water tank；In the fuel tank
On be provided with oil circulation radiator and multiple temperature sensors.
Preferably, the unidirectional electric proportional differential pressure regulating device can carry out electrodeless adjustment inlet and outlet two according to electric signal
The pressure difference at end.
To achieve the above object, the present invention uses the following contents:
A method of for excavator thermal equilibrium analysis, comprising the following steps:
1) electric ratiomotor is loaded for promoting excavator using hydraulic dynamometer machine simulation excavator actual condition
Engine power output causes water tank temperature to be promoted；
2) cooperate to obtain the heat of water circulation exchange by temperature sensor on water tank and water radiator；
3) by adjusting unidirectional electric proportional differential pressure regulating device, for adjusting between electric ratiomotor import and safety valve
Pressure difference △ P, while corresponding discharge q when electric ratiomotor works is measured by flow sensor, pass through Q heat=K △ Pq and calculates
To oil liquid obtain heat；
4) unidirectional electric proportional differential pressure regulating device and hydraulic dynamometer machine cooperate, and reasonably adjust the control ginseng of hydraulic dynamometer machine
Number, can simulate actual loading, to study oil circulation cooling system and water circulation of the excavator under different operating conditions
The performance of cooling system, to analyze excavator thermal balance.
The invention has the following advantages that
Present apparatus design is rationally, easy-to-use and vdiverse in function, can simulate actual loading indoors, and by hydraulic
Dynamometer machine to water follow cooling system ring be adjusted, by unidirectional electric proportional differential pressure regulating device to oil circulation cooling system etc.
It is adjusted, acquires data by multiple sensors and the thermal balance performance of excavator is analyzed.
Detailed description of the invention
Specific embodiments of the present invention will be described in further detail with reference to the accompanying drawing.
Fig. 1 is a kind of device and method structural schematic diagram for excavator thermal equilibrium analysis of the invention.
In figure, each appended drawing reference are as follows:
1- fuel tank, 2- hydraulic oil radiator, 3- hand-operated direction valve, 4- electricity ratiomotor, the hydraulic dynamometer machine of 5-, 6- No.1 list
To valve, unidirectionally electric proportional differential pressure regulating device, No. bis- check valves of 8-, 9- safety valve, 10- hydraulic pump, 11- excavator start 7-
Machine, 12- water tank, 13- repairing pump motor group, 14- high pressure filter, 15- overflow valve, 16- pressure gauge, 17- pressure pipe.
Specific embodiment
In order to illustrate more clearly of the present invention, below with reference to preferred embodiment, the present invention is described further.Ability
Field technique personnel should be appreciated that following specifically described content is illustrative and be not restrictive, this should not be limited with this
The protection scope of invention.
As shown in Figure 1, a kind of device and method for excavator thermal equilibrium analysis includes: excavator dynamical system, hand
Dynamic reversal valve 3, electric ratiomotor 4, hydraulic dynamometer machine 5, unidirectional electric proportional differential pressure regulating device 7 and repairing pump motor group 13；?
Hand-operated direction valve 3 is set at the oil pump out of the mouth of the excavator dynamical system；In the front end of the hand-operated direction valve 3, electricity is set
Ratiomotor 4；The unidirectional electric proportional differential pressure regulating device 7 of setting at the oil inlet of the electric ratiomotor 4；The electricity ratio horse
Repairing mouth and drain tap are respectively arranged with up to 4；Hydraulic dynamometer machine 5 is connected on the output shaft of the electricity ratiomotor 4；Described
Repairing pump motor group 13 is set at the repairing mouth and drain tap of electric ratiomotor 4；By the way that above-mentioned component is arranged, convenient for making the present apparatus
Preferably operation, can be improved working efficiency, energy saving.
It is arranged A, B mouthfuls in the front end of the hand-operated direction valve 3；The A mouth of the hand-operated direction valve 3 connects electric ratiomotor 4
Oil inlet, the B mouth of hand-operated direction valve 3 connects the oil outlet of electric ratiomotor 4, A mouth and electricity ratio horse in hand-operated direction valve 3
Up to being provided with unidirectional electric proportional differential pressure regulating device 7 between 4 oil inlet；In the unidirectional electric proportional differential pressure regulating device 7
No.1 check valve 6 and No. two check valves 8 and flowmeter are respectively set on import and export pipeline；The electricity ratiomotor 4 and repairing
By an oil line pipe connection between pump motor group 13, and on the oil line pipe of the front end of repairing pump motor group 13 respectively
It is provided with high pressure filter 14 and pressure pipe 17；Pressure gauge 16 and overflow valve are respectively arranged in the two sides of the pressure pipe 17
15, by the way that overflow valve 15 is arranged, convenient for the pressure in release oil pipe；When the pressure rise in protected system is more than permissible value
When, the valve of overflow valve 15 automatically opens, and the extra medium of discharge part continues to increase, works as system to prevent the pressure of locking system
Pressure reduction to specified value when, valve is automatically closed to guarantee the normal operation of system.
The excavator dynamical system includes digger engine 11, hydraulic pump 10, fuel tank 1 and water tank 12；The excavation
Machine engine 11 is connect with hydraulic pump 10, convenient for providing the energy to engine；The inlet port of the hydraulic pump 10 connects fuel tank 1,
It is 10 fuel feeding of hydraulic pump convenient for passing through fuel tank 1；The oil outlet of the hydraulic pump 10 connects hand-operated direction valve 3, convenient for change manually
Power source is provided to valve 3；Water tank 12 is installed on the digger engine 11, uses water convenient for providing for the present apparatus.
Safety valve 9 is set on the oil line pipe of the oil outlet of the hydraulic pump 10, when mechanical breather valve breaks down,
Safety valve 9 on hydraulic pump 10 can replace mechanical breather valve to be exhausted and deflate, while be also used for protecting system not superpressure
Operation.
It is provided with water circulation heat radiation device and multiple temperature sensors on the water tank 12, by the way that water circulation cooling is arranged
Device is always held at water tank 12 in a fixed range, and in water tank 12 convenient for the temperature in water tank 12 is dissipated
Upper setting temperature sensor, convenient for monitoring the temperature of water tank 12；Oil circulation radiator and multiple is provided on the fuel tank 1
Temperature sensor by setting oil circulation radiator is convenient for the temperature in fuel tank 1 to dissipate, fuel tank 1 is made to be always held at one
In the range of a fixation, and temperature sensor is set on fuel tank 1, convenient for monitoring the temperature of fuel tank 1.
The unidirectional electric proportional differential pressure regulating device 7 can carry out the pressure at electrodeless adjustment inlet and outlet both ends according to electric signal
Difference extends the service life of the present apparatus, improves work convenient for being always held at the present apparatus in one constant pressure differential range
Make efficiency.
A kind of method for excavator thermal equilibrium analysis of the present apparatus, comprising the following steps:
1) load is carried out to electric ratiomotor 4 using hydraulic dynamometer machine 5 simulation excavator actual condition to excavate for being promoted
11 power output of machine engine causes 12 temperature of water tank to be promoted；
2) cooperate to obtain the heat of water circulation exchange by temperature sensor on water tank 12 and water radiator；
3) by adjusting unidirectional electric proportional differential pressure regulating device 7, for adjust electric 4 import of ratiomotor and safety valve 9 it
Between pressure difference △ P, while corresponding discharge q when electric ratiomotor 4 works is measured by flow sensor, passes through Q heat=K △ Pq
The heat obtained to oil liquid calculated；
4) unidirectional electric proportional differential pressure regulating device 7 cooperates with hydraulic dynamometer machine 5, reasonably adjusts the control of hydraulic dynamometer machine 5
Parameter can simulate actual loading, follow to study oil circulation cooling system and water of the excavator under different operating conditions
The performance of ring cooling system, to analyze excavator thermal balance.
System scattered for oil, Q heat=kx △ PXQ, △ P is the scattered system pressure difference of oil in formula, and Q is the stream for passing through the scattered system of oil
Amount；By accurately adjusting the △ P of the scattered system of oil, flow is read by flow sensor, the heat of fuel-displaced scattered system can be calculated；
The heat that different △ P are lauched scattered system can be measured by water conservancy dynamometer machine again simultaneously, provide number to do excavator thermal balance research
According to.
The excavator thermal balance performance of the present apparatus is the conversion of 45 DEG C of environment temperatures of standard ambient temperature, and oil liquid radiator dissipates
Oil outlet oil temperature obtains temperature B after converting, if temperature B is not more than 85 DEG C, is proving the heat dissipation performance of oil liquid radiator just
Often, calculation formula is as follows:
B=T8+ (F-T0) × η
In formula:
B is hydraulic fluid temperature after the conversion of OEM standard, unit DEG C；
F is environment temperature under OEM standard, is 45 DEG C；
T0 is accurate environment temperature, unit DEG C in test；
η is coefficient of the oil temperature with temperature change, general value 0.8；
It opens data collecting instrument and acquires signal, start test hydraulic crawler excavator, open air conditioner refrigeration effect, manipulator
Handle makes swing arm, scraper bowl build the pressure, and dipper circulation is excavated, unloaded, ongoing operation, until when each temperature test point is temperature-resistant lasting
After 15 minutes or more, assert that this hydraulic crawler excavator thermal balance reaches equilibrium state at this time, storing data, then by the number of acquirement
According to the heat dissipation performance formula for substituting into the evaluation present apparatus respectively: ABT=(A-T5)+T0；Evaluate the heat dissipation performance formula of the present apparatus:
In ABT=(A-T5)+T0, ABT requires to be not less than 50 DEG C, if calculating the value of ABT less than 50 DEG C according to the obtained data of test,
It then proves that the present apparatus currently radiates in undesirable state, needs to overhaul examination in time.
Obviously, the above embodiment of the present invention be only to clearly illustrate example of the present invention, and not be pair
The restriction of embodiments of the present invention may be used also on the basis of the above description for those of ordinary skill in the art
To make other variations or changes in different ways, all embodiments can not be exhaustive here, it is all to belong to this hair
The obvious changes or variations that bright technical solution is extended out are still in the scope of protection of the present invention.
Claims (7)
1. a kind of device for excavator thermal equilibrium analysis characterized by comprising excavator dynamical system, manual reverse of direction
Valve, electric ratiomotor, hydraulic dynamometer machine, unidirectional electric proportional differential pressure regulating device and repairing pump motor group；It is motor-driven in the excavation
Hand-operated direction valve is set at the oil pump out of the mouth of Force system；In the front end of the hand-operated direction valve, electric ratiomotor is set；Institute
It states and unidirectional electric proportional differential pressure regulating device is set at the oil inlet of electric ratiomotor；The electricity ratiomotor is respectively arranged with repairing
Mouth and drain tap；Hydraulic dynamometer machine is connected on the output shaft of the electricity ratiomotor；In the repairing mouth of the electric ratiomotor
And repairing pump motor group is set at drain tap.
2. a kind of device for excavator thermal equilibrium analysis according to claim 1, which is characterized in that described manual
The front end of reversal valve is arranged A, B mouthfuls；The A mouth of the hand-operated direction valve connects the oil inlet of electric ratiomotor, the B of hand-operated direction valve
Mouth connects the oil outlet of electric ratiomotor, is provided between the A mouth of hand-operated direction valve and the oil inlet of electric ratiomotor unidirectional
Electric proportional differential pressure regulating device；No.1 list is respectively set on the import and export pipeline of the unidirectional electric proportional differential pressure regulating device
To valve and No. two check valves and flowmeter；Connected between the electricity ratiomotor and repairing pump motor group by an oil line pipe
It is logical, and high pressure filter and pressure pipe are respectively arranged on the oil line pipe of the front end of repairing pump motor group；In the pressure
The two sides of solenoid are respectively arranged with pressure gauge and overflow valve.
3. a kind of device for excavator thermal equilibrium analysis according to claim 1, which is characterized in that the excavator
Dynamical system includes digger engine, hydraulic pump, fuel tank and water tank；The digger engine is connect with hydraulic pump；It is described
The inlet port of hydraulic pump connects fuel tank；The oil outlet of the hydraulic pump connects hand-operated direction valve；On the digger engine
Water tank is installed.
4. a kind of device for excavator thermal equilibrium analysis according to claim 3, which is characterized in that described hydraulic
Safety valve is set on the oil line pipe of the oil outlet of pump.
5. a kind of device for excavator thermal equilibrium analysis according to claim 3, which is characterized in that in the water tank
On be provided with water circulation heat radiation device and multiple temperature sensors；Oil circulation radiator and multiple is provided on the fuel tank
Temperature sensor.
6. a kind of device for excavator thermal equilibrium analysis according to claim 1, which is characterized in that the unidirectional electricity
Proportional differential pressure regulating device can carry out the pressure difference at electrodeless adjustment inlet and outlet both ends according to electric signal.
7. a kind of method for excavator thermal equilibrium analysis, which is characterized in that pass through claim 1 to 6 any one right
It is required that a kind of device for excavator thermal equilibrium analysis is realized, comprising the following steps:
1) electric ratiomotor is loaded using hydraulic dynamometer machine simulation excavator actual condition and is started for promoting excavator
Machine power output causes water tank temperature to be promoted；
2) cooperate to obtain the heat of water circulation exchange by temperature sensor on water tank and water radiator；
3) by adjusting unidirectional electric proportional differential pressure regulating device, for adjusting the pressure difference between electric ratiomotor import and safety valve
△ P, while corresponding discharge q when electric ratiomotor works is measured by flow sensor, it is arrived by what Q heat=K △ Pq was calculated
The heat that oil liquid obtains；
4) unidirectional electric proportional differential pressure regulating device and hydraulic dynamometer machine cooperate, and reasonably adjust the control parameter of hydraulic dynamometer machine, can
Actual loading is simulated, to study oil circulation cooling system and water circulation cooling system of the excavator under different operating conditions
The performance of system, to analyze excavator thermal balance.
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| CN201910133227.6A CN109883744B (en) | 2019-02-22 | 2019-02-22 | A device and method for heat balance analysis of excavator |
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| CN201910133227.6A CN109883744B (en) | 2019-02-22 | 2019-02-22 | A device and method for heat balance analysis of excavator |
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| CN109883744B CN109883744B (en) | 2021-05-07 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111753372A (en) * | 2020-06-11 | 2020-10-09 | 雷沃工程机械集团有限公司 | An excavator heat balance simulation method and system |
| CN113550371A (en) * | 2021-06-22 | 2021-10-26 | 徐州徐工挖掘机械有限公司 | Excavator hydraulic oil warming system and control method thereof |
| CN117758819A (en) * | 2023-11-01 | 2024-03-26 | 潍柴(青岛)智慧重工有限公司 | A new type of electric excavator rotating platform structure |
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| CN113550371A (en) * | 2021-06-22 | 2021-10-26 | 徐州徐工挖掘机械有限公司 | Excavator hydraulic oil warming system and control method thereof |
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| CN109883744B (en) | 2021-05-07 |
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