CN215669808U - Independent heat dissipation energy-saving control system and excavator - Google Patents
Independent heat dissipation energy-saving control system and excavator Download PDFInfo
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- CN215669808U CN215669808U CN202122334723.3U CN202122334723U CN215669808U CN 215669808 U CN215669808 U CN 215669808U CN 202122334723 U CN202122334723 U CN 202122334723U CN 215669808 U CN215669808 U CN 215669808U
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Abstract
The utility model belongs to the technical field of engineering machinery hydraulic control systems, and particularly relates to an independent heat dissipation energy-saving control system and an excavator, which comprise a hydraulic variable pump, an electromagnetic directional valve, a motor, a fan and an oil tank, wherein an oil inlet of the hydraulic variable pump is communicated with the oil tank, an oil outlet of the hydraulic variable pump is communicated with an oil inlet of the electromagnetic directional valve, a working oil port of the electromagnetic directional valve is communicated with the motor, an oil return port of the electromagnetic directional valve is connected with the oil tank, the motor is used for driving the fan, and a switch valve is arranged between the hydraulic variable pump and the electromagnetic directional valve; and an overflow valve is arranged between the oil outlet of the hydraulic variable pump and the oil tank. When the temperature of the hydraulic oil is lower, an oil way leading to the motor is cut off by the switch valve, so that the operation of a fan is avoided, the output flow of the hydraulic variable pump is reduced, the power consumption is reduced, the preheating time of a hydraulic system is shortened, and the temperature of the hydraulic oil is quickly increased to the optimal working temperature.
Description
Technical Field
The utility model belongs to the technical field of engineering machinery hydraulic control systems, and particularly relates to an independent heat dissipation energy-saving control system and an excavator.
Background
Because the large excavator uses the engine with larger power, if the engine is used for directly driving the fan to work for heat dissipation, although the heat dissipation efficiency is high, the energy waste is serious, so in order to save fuel consumption, the heat dissipation system mostly adopts an independent heat dissipation hydraulic system at present, and the change of the rotating speed of the fan is achieved by controlling the displacement change of a heat dissipation pump. However, only the heat dissipation capability of the fan at the maximum working speed is considered, the flow output of the heat dissipation pump is often ignored in the low-temperature environment, the fan is driven to operate, the power consumption is reduced, meanwhile, the preheating time of the hydraulic system in the low-temperature environment is increased, and the hydraulic system cannot rapidly reach the optimal working state.
Disclosure of Invention
In order to overcome the defects of the prior art, the utility model provides the independent heat dissipation energy-saving control system, when the temperature of the hydraulic oil of the hydraulic pump and the hydraulic system is lower, the output flow of the hydraulic pump is reduced, so that the power consumption of the hydraulic pump is reduced, the heat dissipation of the hydraulic oil is not carried out, and the oil temperature of the hydraulic oil is quickly increased to the optimal working temperature.
The utility model is realized by the following technical scheme: an independent heat dissipation energy-saving control system comprises a hydraulic variable pump, an electromagnetic directional valve, a motor, a fan and an oil tank, wherein an oil inlet of the hydraulic variable pump is communicated with the oil tank, an oil outlet of the hydraulic variable pump is communicated with an oil inlet of the electromagnetic directional valve, a working oil port of the electromagnetic directional valve is communicated with the motor, an oil return port of the electromagnetic directional valve is connected back to the oil tank, the motor is used for driving the fan, and a switch valve is arranged between the hydraulic variable pump and the electromagnetic directional valve; and an overflow valve is arranged between the oil outlet of the hydraulic variable pump and the oil tank.
Further, the hydraulic variable pump is controlled by proportional pressure and comprises a proportional overflow valve, a pressure compensation valve and a throttle valve.
Furthermore, the electromagnetic directional valve is a two-position four-way electromagnetic directional valve.
Furthermore, a one-way valve is arranged between the oil inlet of the electromagnetic reversing valve and the oil return port of the electromagnetic reversing valve, and the one-way valve is communicated from the oil return port of the electromagnetic reversing valve to the oil inlet of the electromagnetic reversing valve.
Further, the switching valve is a switching throttle valve.
The utility model also provides an excavator which comprises the independent heat dissipation energy-saving control system.
The utility model has the beneficial effects that: when the temperature of the hydraulic oil is lower, an oil way leading to the motor is cut off by the switch valve, so that the operation of a fan is avoided, the output flow of the hydraulic variable pump is reduced, the power consumption is reduced, the preheating time of a hydraulic system is shortened, and the temperature of the hydraulic oil is quickly increased to the optimal working temperature.
Drawings
FIG. 1 is a hydraulic schematic of the present invention;
FIG. 2 is a hydraulic improvement schematic of the present invention;
in the figure, 1, a hydraulic variable pump, 2, an overflow valve, 3, a switch valve, 4, an electromagnetic directional valve, 5, a motor, 6, a fan, 7, an oil tank, 8 and a one-way valve.
Detailed Description
The utility model is further illustrated below with reference to the figures and examples.
As shown in fig. 1, the independent heat dissipation energy-saving control system comprises a hydraulic variable pump 1, an electromagnetic directional valve 4, a motor 5, a fan 6 and an oil tank 7. The hydraulic variable pump 1 provides power for the energy-saving control system, an oil inlet of the hydraulic variable pump 1 is communicated with the oil tank 7, an oil outlet of the hydraulic variable pump 1 is communicated with an oil inlet P of the electromagnetic directional valve 4, and the electromagnetic directional valve 4 adopts a two-position four-way electromagnetic directional valve. The working oil port A and the working oil port B of the electromagnetic directional valve 4 are respectively communicated with two ends of a motor 5, an oil return port T of the electromagnetic directional valve 4 is connected with an oil return tank 7, the motor 5 is used for driving a fan 6, and a switch valve 3 is arranged between the hydraulic variable pump 1 and the electromagnetic directional valve 4. And an overflow valve 2 which plays a pressure protection role in the energy-saving control system is arranged between the oil outlet of the hydraulic variable pump 1 and the oil tank 7. The hydraulic variable pump is controlled by proportional pressure and comprises a proportional overflow valve, a pressure compensation valve and a throttle valve.
When the temperature of hydraulic oil is lower than 40 ℃, the switch valve 3 is electrified to block an oil path from the hydraulic variable pump 1 to the electromagnetic directional valve 4, the controller outputs the maximum current to a proportional overflow valve of the hydraulic variable pump 1, the proportional overflow valve is in inverse proportional control, so the overflow pressure of the proportional overflow valve is minimum, the hydraulic variable pump 1 only needs to output less flow to meet the internal leakage amount of the hydraulic variable pump and the smaller overflow amount of the proportional overflow valve, the fan 6 does not operate to reduce power consumption, meanwhile, the hydraulic oil in the shell of the hydraulic variable pump can be quickly preheated due to the internal leakage and overflow effects, and the hydraulic system of the whole machine can reach the optimal working state in a shorter time due to the non-operation of the fan 6; after the hydraulic oil temperature reaches a set working temperature, the switch valve 3 is powered off, the oil path from the hydraulic variable pump 1 to the motor 5 is communicated, the controller outputs different currents to the proportional overflow valve of the hydraulic variable pump 1 according to the hydraulic oil temperature, the higher the oil temperature is, the higher the overflow pressure of the proportional overflow valve is, when the pressure of the driving motor 5 reaches the overflow pressure of the proportional overflow valve, the swash plate swing angle is adjusted by the hydraulic variable pump 1, so that the hydraulic variable pump works under the overflow pressure, the displacement change of the hydraulic variable pump 1 is realized according to the hydraulic oil temperature, and the rotating speeds of the motor 5 and the fan 6 are controlled, so that the heat dissipation requirement is met.
As an improvement of this embodiment, a check valve 8 is disposed between an oil inlet of the electromagnetic directional valve 4 and an oil return port of the electromagnetic directional valve 4, and the check valve 8 is conducted from the oil return port of the electromagnetic directional valve 4 to the oil inlet of the electromagnetic directional valve 4. After the power supply is flamed out, the heat-radiating pump stops supplying oil to the motor, and the inertial motor can continue to rotate, so that the motor is easy to suck air.
As a modification of this embodiment, as shown in fig. 2, the on-off valve 3 is an on-off throttle valve, and matching with a proper throttle valve, it is also possible to realize that the fan 6 does not operate or operates at an extremely low rotation speed.
The utility model also provides an excavator which comprises the independent heat dissipation energy-saving control system.
Claims (6)
1. The utility model provides an energy-conserving control system independently dispels heat which characterized in that: the hydraulic variable displacement pump comprises a hydraulic variable displacement pump (1), an electromagnetic directional valve (4), a motor (5), a fan (6) and an oil tank (7), wherein an oil inlet of the hydraulic variable displacement pump (1) is communicated with the oil tank (7), an oil outlet of the hydraulic variable displacement pump (1) is communicated with an oil inlet of the electromagnetic directional valve (4), a working oil port of the electromagnetic directional valve (4) is communicated with the motor (5), an oil return port of the electromagnetic directional valve (4) is connected with the oil tank (7), the motor (5) is used for driving the fan (6), and a switch valve (3) is arranged between the hydraulic variable displacement pump (1) and the electromagnetic directional valve (4); an overflow valve (2) is arranged between the oil outlet of the hydraulic variable pump (1) and the oil tank (7).
2. The independent heat dissipation energy-saving control system of claim 1, wherein: the hydraulic variable pump (1) is controlled by proportional pressure and comprises a proportional overflow valve, a pressure compensation valve and a throttle valve.
3. The independent heat dissipation energy-saving control system of claim 1, wherein: the electromagnetic directional valve (4) is a two-position four-way electromagnetic directional valve.
4. The independent heat dissipation energy-saving control system of claim 1, wherein: and a one-way valve (8) is arranged between the oil inlet of the electromagnetic directional valve (4) and the oil return port of the electromagnetic directional valve (4), and the one-way valve (8) is communicated from the oil return port of the electromagnetic directional valve (4) to the oil inlet of the electromagnetic directional valve (4).
5. The independent heat dissipation energy-saving control system of claim 1, wherein: the switch valve (3) is a switch throttle valve.
6. An excavator, characterized in that: the independent heat dissipation energy-saving control system comprises the independent heat dissipation energy-saving control system as claimed in any one of claims 1-5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122334723.3U CN215669808U (en) | 2021-09-26 | 2021-09-26 | Independent heat dissipation energy-saving control system and excavator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122334723.3U CN215669808U (en) | 2021-09-26 | 2021-09-26 | Independent heat dissipation energy-saving control system and excavator |
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| Publication Number | Publication Date |
|---|---|
| CN215669808U true CN215669808U (en) | 2022-01-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202122334723.3U Active CN215669808U (en) | 2021-09-26 | 2021-09-26 | Independent heat dissipation energy-saving control system and excavator |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115163280A (en) * | 2022-08-18 | 2022-10-11 | 潍柴雷沃重工股份有限公司 | Cooling system suitable for agricultural machine and harvester |
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2021
- 2021-09-26 CN CN202122334723.3U patent/CN215669808U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115163280A (en) * | 2022-08-18 | 2022-10-11 | 潍柴雷沃重工股份有限公司 | Cooling system suitable for agricultural machine and harvester |
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