CN208474217U - Construction machinery hydraulic system - Google Patents
Construction machinery hydraulic system Download PDFInfo
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- CN208474217U CN208474217U CN201821004395.2U CN201821004395U CN208474217U CN 208474217 U CN208474217 U CN 208474217U CN 201821004395 U CN201821004395 U CN 201821004395U CN 208474217 U CN208474217 U CN 208474217U
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- hydraulic
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- thermostat
- hydraulic system
- thermostat valve
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Abstract
The utility model relates to construction machinery hydraulic systems, to solve the long disadvantage of existing construction machinery hydraulic system warm-up period, the utility model constructs a kind of construction machinery hydraulic system, including thermostat valve, thermostat, the oil return circuit that the hydraulic system is connected to after thermostat and radiator tandem collects between terminal and hydraulic oil container, and the oil return circuit that thermostat valve is connected to hydraulic system collects between terminal and hydraulic oil container.When oil temperature is lower, the opening of thermostat valve is big, and hydraulic oil shortens warm-up period mainly through the direct oil return box of thermostat valve when warming-up；Hydraulic oil mainly returns hydraulic oil container through thermostat and radiator when oil temperature is high, improves radiator heat-dissipation efficiency.
Description
Technical field
The utility model relates to a kind of hydraulic systems, more specifically to a kind of construction machinery hydraulic system.
Background technique
Transfer medium of the hydraulic oil as power in construction machinery hydraulic system has higher requirement, liquid to temperature
The temperature of pressure oil cannot be too low, and when hydraulic fluid temperature is too low, viscosity is big, is unfavorable for the transmitting of power, if temperature is too high, itself
Just the property of hydraulic oil is had an impact, while being also easy to lead to the damage of sealing element.Therefore, engineering machinery is when starting to work
Warming-up process will be generally carried out, hydraulic fluid temperature rapid increase is made.After machine works long hours, need by radiator to liquid
Pressure oil radiates, so that it is guaranteed that hydraulic working oil is in certain range.
In existing construction machinery hydraulic system such as excavator hydraulic system, the oil return circuit of hydraulic system is in terminal point
For two-way, pass through the direct oil return box of the first counterbalance valve all the way, in addition passes through concatenated second counterbalance valve and radiator oil return all the way
Case cannot be implemented to adjust, become by the flow of radiator since the pressure of the first counterbalance valve and the second counterbalance valve is constant with temperature
It is unpredictable to change distribution, leads to problems such as hydraulic oil radiating efficiency relatively low, while this fixed proportion flow flows through radiator and exists
Warm-up period can be extended when machine warming-up, the radiating efficiency of radiator cannot be equally made full use of in analysis of hydraulic oil overheat.
Utility model content
The technical problems to be solved in the utility model is the long disadvantage of existing construction machinery hydraulic system warm-up period, and is mentioned
For a kind of construction machinery hydraulic system, machine warm-up period is effectively shortened, the radiating efficiency of radiator when improving hydraulic oil high temperature.
The utility model is to realize that the technical solution of its purpose is such that construct a kind of construction machinery hydraulic system, is wrapped
Include the hydraulic oil container of saving hydraulic oil, from hydraulic oil container draw oil and by mechanical energy be converted into hydraulic energy hydraulic pump,
The hydraulic executive item that converts hydraulic energy to mechanical energy is arranged between hydraulic executive item and hydraulic pump for controlling hydraulic execution
Control valve, the radiator of part, it is characterised in that further include thermostat valve, thermostat, connected after the thermostat and radiator tandem
Collect between terminal and hydraulic oil container in the oil return circuit of the hydraulic system, the thermostat valve is connected to the hydraulic system
Oil return circuit collects between terminal and hydraulic oil container.Further, the thermostat valve is according to the temperature of the hydraulic oil for flowing through thermostat valve
Degree adjusts the hydraulic fluid flow rate for flowing through thermostat valve, and reduces as hydraulic fluid temperature increases its flow.In the present invention, work
Journey machinery includes the mechanical equipment for having hydraulic system and needing to radiate to hydraulic system, such as loading machine, excavator, pressure road
Machine, land leveller, bull-dozer, fork truck etc..
Compared with prior art, the flow of the utility model hydraulic system oil return is by thermostat and thermostat valve for the utility model
Control distribution is adjusted, with the raising of oil temperature, the opening of thermostat is increasing, and it is more by the flow of radiator, by dissipating
Hot device changes flow proportional by temperature control valve regulation with the flow for directly returning hydraulic oil container, improves the reliability of radiator and dissipates
The radiating efficiency of hot device.When oil temperature is lower, the opening of thermostat valve is larger, and the flow that thermostat valve is flowed through in warming-up is larger, liquid
Pressure oil is through the direct oil return box of thermostat valve, and hydraulic oil temperature, which increases, to be accelerated, and warm-up period shortens, improves work efficiency, and reduces oil
Consumption, solves the problems, such as since oil temperature cannot be improved quickly when environment temperature is too low, and oil temperature variation causes oil return system to pass through
It crosses radiator and direct oil return box flow assigns unreasonable problem.
Detailed description of the invention
Fig. 1 is the schematic diagram of the utility model hydraulic system.
Parts title and serial number in figure:
Hydraulic pump 1, hydraulic executive item 2, control valve 3, thermostat valve 4, thermostat 5, radiator 6, hydraulic oil container 7.
Specific embodiment
Illustrate specific embodiment with reference to the accompanying drawing.
As shown in Figure 1, the construction machinery hydraulic system in the present embodiment includes hydraulic pump 1, hydraulic executive item 2, control valve
3, thermostat valve 4, thermostat 5, radiator 6, hydraulic oil container 7.
Wherein, hydraulic oil container 7 is for saving hydraulic oil and the oil return for receiving hydraulic system；Hydraulic pump 1 is from hydraulic oil container 7
Draw oil simultaneously converts hydraulic energy for mechanical energy, and output high pressure liquid pressure oil is for driving hydraulic executive item 2；Hydraulic executive item
2 convert hydraulic energy to mechanical energy；Control valve 3 is arranged between hydraulic executive item 2 and hydraulic pump 1 for controlling hydraulic executive item
2.The oil return opening of each control valve is collected to oil return circuit terminal in hydraulic system, when necessary also with the oil return of hydraulic executive item 2
Oil return circuit terminal is collected to without control valve 3.
Thermostat 5 and radiator 6 are connected between the oil return circuit terminal of hydraulic system and hydraulic oil container 7 after connecting, temperature
Control valve 4 is connected between the oil return circuit terminal of hydraulic system and hydraulic oil container.Thermostat valve is according to the hydraulic oil for flowing through thermostat valve
Temperature adjust and flow through the hydraulic fluid flow rate of thermostat valve, and reduce as hydraulic fluid temperature increases its flow.
When environment temperature is lower needs hydraulic fluid temperature rapid increase, the valve port opening of thermostat valve is larger and thermostat
The aperture that is open is smaller, and the hydraulic oil for flowing to the oil return circuit terminal of hydraulic system mainly directly returns hydraulic oil container through thermostat valve, stream
It is less through radiator and the hydraulic oil of external environment progress heat exchange, to realize that hydraulic fluid temperature is rapidly heated, shorten warming-up
It is time, energy saving.When hydraulic fluid temperature is higher, the valve port opening of thermostat valve is smaller and the opening aperture of thermostat is larger,
The hydraulic oil for flowing to the oil return circuit terminal of hydraulic system mainly carries out heat exchange through radiator and external environment again through thermostat
Return hydraulic oil container again afterwards, the hydraulic oil of most of flow flows through radiator and sufficiently radiates, and improves the radiating efficiency of radiator.
Claims (2)
1. a kind of construction machinery hydraulic system, hydraulic oil container including saving hydraulic oil, draw oil is simultaneously from hydraulic oil container
The hydraulic pump of hydraulic energy is converted by mechanical energy, the hydraulic executive item that converts hydraulic energy to mechanical energy, is arranged in hydraulic execution
For controlling control valve, the radiator of hydraulic executive item between part and hydraulic pump, it is characterised in that further include thermostat valve, section temperature
Device is connected between the oil return circuit terminal of the hydraulic system and hydraulic oil container after the thermostat and radiator tandem, institute
Thermostat valve is stated to be connected between the oil return circuit terminal of the hydraulic system and hydraulic oil container.
2. construction machinery hydraulic system according to claim 1, it is characterised in that the thermostat valve is according to flowing through thermostat valve
The temperature of hydraulic oil adjust and flow through the hydraulic fluid flow rate of thermostat valve, and reduce as hydraulic fluid temperature increases its flow.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821004395.2U CN208474217U (en) | 2018-06-28 | 2018-06-28 | Construction machinery hydraulic system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821004395.2U CN208474217U (en) | 2018-06-28 | 2018-06-28 | Construction machinery hydraulic system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208474217U true CN208474217U (en) | 2019-02-05 |
Family
ID=65215621
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821004395.2U Active CN208474217U (en) | 2018-06-28 | 2018-06-28 | Construction machinery hydraulic system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208474217U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110513361A (en) * | 2019-09-02 | 2019-11-29 | 柳州柳工挖掘机有限公司 | Construction machinery hydraulic system and hydraulic oil method for controlling temperature rise |
-
2018
- 2018-06-28 CN CN201821004395.2U patent/CN208474217U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110513361A (en) * | 2019-09-02 | 2019-11-29 | 柳州柳工挖掘机有限公司 | Construction machinery hydraulic system and hydraulic oil method for controlling temperature rise |
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