CN213360663U - Hydrostatic heat dissipation loop - Google Patents
Hydrostatic heat dissipation loop Download PDFInfo
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- CN213360663U CN213360663U CN202022012607.5U CN202022012607U CN213360663U CN 213360663 U CN213360663 U CN 213360663U CN 202022012607 U CN202022012607 U CN 202022012607U CN 213360663 U CN213360663 U CN 213360663U
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Abstract
The utility model discloses a hydrostatic heat dissipation circuit, it belongs to engineering machine tool's cooling system field, and it has solved and has lacked one kind among the prior art and can set for the temperature according to different fluid, and control system removes radiating fluid, guarantees simultaneously that closed system's shell pressure can not be too high, and hydraulic system works the problem in the hydrostatic heat dissipation circuit within the optimum temperature range all the time. The oil return system mainly comprises an open type oil return system and a closed type shell oil return system, wherein the open type oil return system comprises a heat dissipation electromagnetic valve and a radiator I, the heat dissipation electromagnetic valve is connected with an oil tank and the radiator I, and the radiator I is connected with the oil tank; the closed shell oil return system comprises a temperature control valve and a radiator II, wherein the temperature control valve is connected with the oil tank and the radiator II, and the radiator II is connected with the oil tank; the heat dissipation electromagnetic valve is connected with the temperature control circuit. The utility model discloses the hydrostatic system's of mainly used oil circuit heat dissipation.
Description
Technical Field
The utility model relates to an engineering machine tool's cooling system, specifically speaking especially relates to a quiet hydraulic pressure heat dissipation loop.
Background
For the engineering machinery using the hydrostatic system, the efficiency of the hydraulic system determines the efficiency of the whole machine, and the efficiency of the hydraulic system is closely related to the temperature of oil. The optimal working temperature ranges of different oil liquids and hydraulic oil are different. The engineering machinery of the hydrostatic system usually adopts a closed system to drive a walking and working device so as to obtain higher working efficiency, and adopts an open system to drive other devices such as steering and the like.
Because of the existence of a closed system, a large amount of heat dissipation is needed to maintain the temperature of the hydraulic system, meanwhile, the return oil pressure of the shell cannot be too high, and the shaft seal of a hydraulic element can be damaged due to the too high pressure of the shell, so that two solutions are generally adopted, one adopts a radiator and a bypass one-way valve to dissipate heat, and the hydraulic system cannot always work in the optimal temperature range by the mode; the utility model provides an adopt the supplementary radiating mode of open system, open system oil return always passes through the radiator, in order to reach sufficient heat dissipation capacity, open system hydraulic pump often need increase discharge capacity for hydraulic system cost risees, and spatial layout is difficult, and open system removes the heat dissipation always and has the energy waste, and when the system low temperature starts, be unfavorable for rapid heating up and reach in the best operating temperature scope.
At present, a hydrostatic heat dissipation loop which can set temperature according to different oil liquid and control a system to dissipate heat is lacked, and meanwhile, the shell pressure of a closed system is not too high, and the hydraulic system always works within an optimal temperature range.
Disclosure of Invention
The utility model aims at providing a hydrostatic heat dissipation return circuit to solve lack one among the prior art and to set for the temperature according to different fluid, control system removes radiating fluid, guarantees simultaneously that closed system's shell pressure can not be too high, and hydraulic system works the problem in the hydrostatic heat dissipation return circuit within the optimum temperature range all the time.
The utility model discloses a realize through following technical scheme:
a hydrostatic heat dissipation loop comprises an open type oil return system and a closed type shell oil return system, wherein the open type oil return system comprises a heat dissipation electromagnetic valve and a radiator I; the closed shell oil return system comprises a temperature control valve and a radiator II, wherein the temperature control valve is connected with the oil tank and the radiator II, and the radiator II is connected with the oil tank; the heat dissipation electromagnetic valve is connected with the temperature control circuit.
Further, the temperature control circuit include relay I, relay II, temperature switch I and temperature switch II, heat dissipation solenoid valve and relay I are connected, heat dissipation solenoid valve and relay II are connected, temperature switch I and relay I are connected, temperature switch I, relay II and temperature switch II are connected with the power respectively, temperature switch II and relay I are connected, temperature switch II and relay II are connected.
Furthermore, the temperature control valve is a temperature control valve with an overflow valve connected in parallel inside.
Compared with the prior art, the beneficial effects of the utility model are that:
1. the mode of separately radiating the closed system and the open system is adopted, so that not only is enough radiating flow ensured, but also the shell pressure of the closed system is not too high.
2. The opening temperature of the heat dissipation electromagnetic valve and the temperature control valve can be adjusted according to different oil, and the hydraulic system can work in the optimal temperature range.
3. The static hydraulic heat dissipation system does not dissipate heat at low temperature, so that the system is heated up quickly, the waste of energy at low temperature is avoided, and the static hydraulic heat dissipation system is energy-saving and efficient.
Drawings
FIG. 1 is a hydraulic schematic diagram of the present invention;
fig. 2 is an electrical schematic of the present invention;
FIG. 3 is a graph of viscosity-temperature characteristics of different hydraulic oils.
In the figure: 1. a heat dissipation electromagnetic valve; 2. a radiator I; 3. an oil tank; 4. a radiator II; 5. a temperature control valve; 6. a relay I; 7. a relay II; 8. a temperature switch I; 9. and a temperature switch II.
Detailed Description
The invention will be further described and illustrated with reference to the accompanying drawings.
The utility model discloses an open oil return system and closed casing oil return system part, and the opening temperature that heat dissipation solenoid valve 1 and temperature-sensing valve 5 can be set for is different.
The closed type shell oil return system adopts a self-operated temperature control valve 5 based on a thermostat principle, a temperature sensing assembly which changes according to temperature is arranged in the closed type shell oil return system, the flow entering a radiator II 4 can be automatically adjusted according to the temperature of hydraulic oil, and an overflow valve is connected in parallel in the closed type shell oil return system 5, so that the damage of elements caused by overhigh shell oil return pressure of the closed type shell oil return system can be prevented. According to the type of hydraulic oil, the opening temperature of the thermo valve 5 is set to t 1. Note: t1 is smaller than the upper limit value of the optimum operating temperature range in FIG. 3 (Lishile traveling machine Hydraulic pressure products sample, sample No. RC 90010-01/07.2012: P60) and larger than the lower limit value of the optimum operating temperature range.
The specific working process is as follows: when the temperature is lower than the set temperature t1 of the temperature control valve 5, the temperature control valve 5 is located at the left position under the action of the left spring force, the closed shell oil return system does not dissipate heat, and the oil return tank 3 directly returns to ensure that the hydraulic system is heated up quickly to reach the optimal working temperature.
When the temperature of the hydraulic system is higher than the opening temperature t1 set by the temperature control valve 5, the temperature control valve 5 adjusts the opening size of the shell returning oil to the radiator II 4 according to different temperatures, so that the proportion of the oil to the radiator II 4 and the direct oil return tank 3 is distributed, and the shell returning oil pressure is not high while the heat dissipation of part of the oil is ensured. When the temperature of the hydraulic system rises to the full opening of the temperature control valve 5, the opening of the shell oil return to the radiator II 4 is fully opened, and the shell oil return is completely used for heat dissipation.
When closed system casing oil return pressure is higher than the 5 settlement pressure of temperature-sensing valve, no matter how the system temperature is, the overflow valve in the temperature-sensing valve 5 is opened, and casing pressure reduces, simultaneously because casing pressure effect is used in 5 right sides of temperature-sensing valve for 5 right sides of temperature-sensing valve move, and a large amount of casing oil return directly return oil tank 3 guarantee that casing pressure can not be too high, play the guard action to hydraulic component.
The heat dissipation of the open oil return system is controlled by a heat dissipation electromagnetic valve 1, and the oil temperature of the closed system is monitored by a temperature switch I8 and a temperature switch II 9. And determining the set temperature according to the type of the hydraulic oil, wherein T1 is the lower limit value of the optimal working temperature in the graph 3, and T2 is the upper limit value of the optimal working temperature in the graph 3. When the temperature is lower than the set temperature T1, the heat dissipation electromagnetic valve 1 is located at the right position, the hydraulic oil return of the open oil return system directly returns to the oil tank 3 without heat dissipation, and the temperature is conveniently and rapidly increased. When the temperature is higher than the set temperature T2, the heat dissipation electromagnetic valve 1 is electrified and is positioned at the left position, and the oil of the open oil return system is dissipated to the radiator I2, so that the temperature of the oil of the system is ensured.
The ports 86 of the relay I6 and the relay II 7 are coil power supply input ports, the ports 85 of the relay I6 and the relay II 7 are coil grounding ports, the ports 30 of the relay I6 and the relay II 7 are common ports of a controlled end, and the ports 87 of the relay I6 and the relay II 7 are normally-opened ports of the controlled end; when port 86 is at its rated voltage, port 85 is simultaneously connected to ground, and port 30 is connected to port 87.
Temperature switch I8 and temperature switch II 9 are the normal open type, and when reaching rated temperature T, temperature switch I8 and temperature switch II 9 are closed.
The closing temperature of the temperature switch I8 is set to be T1, the closing temperature of the temperature switch II 9 is set to be T2, and T1 is less than T2.
When temperature T < T1, temperature switch I8 and temperature switch II 9 are off-state, and relay I6 and relay II 7 do not work, and heat dissipation solenoid valve 1 is not electrified.
When the temperature continues to rise, T1< T < T2, the temperature switch I8 is closed, the 504 and the power supply 501 are powered on, the coil of the relay I6 is powered on, the port 30 and the port 87 of the relay I6 are conducted, and the 503 and the 502 are powered on, but because the temperature switch II 9 is not closed and the 503 is not powered on, the coil of the relay II 7 is not powered on, the port 30 and the port 87 of the relay II 7 are not powered on, and the heat dissipation electromagnetic valve 1 is not powered on.
When the temperature continues to rise and T > T2, the temperature switch I8 continues to be closed, the temperature switch II 9 is closed, the 503 and the 501 are connected to be electrified, the coil of the relay II 7 is electrified, the port 30 and the port 87 of the relay II 7 are connected, the 502 and the 501 are connected to be electrified, the heat dissipation electromagnetic valve 1 is electrified to be located at the left position, and the oil way enters the radiator I2 for heat dissipation. At this time, since the port 30 of the relay i 6 is conducted with the port 87, the 503 and 502 of the relay i 6 are turned on and the coil terminal 503 of the relay ii 7 is powered.
When the temperature starts to decrease, and T1< T2, the temperature switch ii 9 is turned off, but since the coil end 503 of the relay ii 7 is in the energized state, the relay ii 7 is still in the closed state, the port 30 and the port 87 of the relay ii 7 are conducted, the 502 and the 501 are in the on state, the heat dissipation electromagnetic valve 1 is in the energized state, and the oil path enters the radiator i 2 for heat dissipation.
When the temperature continues to drop and T < T1, the temperature switch I8 is switched off, the coil end 504 of the relay I6 is not electrified, the port 30 of the relay I6 is switched off from the port 87, the 503 is switched off from the port 502, the 503 is not electrified, the coil end of the relay II 7 is not electrified, the port 30 of the relay II 7 is switched off from the port 87, the 502 is not switched on with the port 501, the 502 is not electrified, and the heat dissipation electromagnetic valve 1 is switched off. The oil circuit does not enter the radiator I2 for heat dissipation.
Claims (2)
1. A hydrostatic heat dissipation circuit, comprising: the oil return system comprises an open oil return system and a closed shell oil return system, wherein the open oil return system comprises a heat dissipation electromagnetic valve (1) and a radiator I (2), the heat dissipation electromagnetic valve (1) is connected with an oil tank (3) and the radiator I (2), and the radiator I (2) is connected with the oil tank (3); the closed shell oil return system comprises a temperature control valve (5) and a radiator II (4), the temperature control valve (5) is connected with the oil tank (3) and the radiator II (4), and the radiator II (4) is connected with the oil tank (3); the heat dissipation electromagnetic valve (1) is connected with the temperature control circuit.
2. The hydrostatic heat dissipation circuit of claim 1, wherein: the temperature control circuit include relay I (6), relay II (7), temperature switch I (8) and temperature switch II (9), heat dissipation solenoid valve (1) and relay I (6) are connected, heat dissipation solenoid valve (1) and relay II (7) are connected, temperature switch I (8) and relay I (6) are connected, temperature switch I (8), relay II (7) and temperature switch II (9) are connected with the power respectively, temperature switch II (9) and relay I (6) are connected, temperature switch II (9) and relay II (7) are connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022012607.5U CN213360663U (en) | 2020-09-15 | 2020-09-15 | Hydrostatic heat dissipation loop |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022012607.5U CN213360663U (en) | 2020-09-15 | 2020-09-15 | Hydrostatic heat dissipation loop |
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| CN213360663U true CN213360663U (en) | 2021-06-04 |
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| CN202022012607.5U Active CN213360663U (en) | 2020-09-15 | 2020-09-15 | Hydrostatic heat dissipation loop |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116146705A (en) * | 2022-12-28 | 2023-05-23 | 山东临工工程机械有限公司 | Hydraulic system with heat dissipation function and engineering machinery vehicle |
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2020
- 2020-09-15 CN CN202022012607.5U patent/CN213360663U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116146705A (en) * | 2022-12-28 | 2023-05-23 | 山东临工工程机械有限公司 | Hydraulic system with heat dissipation function and engineering machinery vehicle |
| CN116146705B (en) * | 2022-12-28 | 2023-10-27 | 山东临工工程机械有限公司 | Hydraulic system with heat dissipation function and engineering machinery vehicle |
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