CN217873561U - Hydraulic system for controlling flow distribution of cooling system by temperature and engineering vehicle - Google Patents
Hydraulic system for controlling flow distribution of cooling system by temperature and engineering vehicle Download PDFInfo
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- CN217873561U CN217873561U CN202222146091.2U CN202222146091U CN217873561U CN 217873561 U CN217873561 U CN 217873561U CN 202222146091 U CN202222146091 U CN 202222146091U CN 217873561 U CN217873561 U CN 217873561U
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Abstract
The utility model discloses a hydraulic system and an engineering vehicle which are distributed by the flow of a temperature control heat dissipation system, comprising a prime motor, a hydraulic pump, a safety valve, an overflow valve, a proportional valve, a fan motor and a back pressure valve; the prime mover is connected with the hydraulic pump; an oil inlet of the hydraulic pump is connected with the oil tank, and an oil outlet of the hydraulic pump is connected with the proportional valve; the proportional valve is connected with a fan motor on one hand, and the fan motor is connected with an oil inlet of the back pressure valve; the proportional valve is directly connected with the oil inlet end of the back pressure valve on the other hand; the oil outlet end of the back pressure valve is connected with the oil tank; the safety valve is connected between an oil outlet of the hydraulic pump and the oil tank; the overflow valve is connected between the reversing valve and the oil tank. The use of the proportional valve can realize the stepless regulation of the flow distribution of the fan motor, and the rotating speed of the fan motor is influenced by the temperature change of the oil liquid of the system, so that the system is more intelligent, and the energy consumption of heating the hydraulic oil in alpine regions is reduced.
Description
Technical Field
The utility model relates to a hydraulic system by temperature control cooling system flow distribution belongs to the hydraulic system field.
Background
The hydraulic transmission has the advantages of stable transmission, convenient operation and control, easy realization of stepless speed regulation, large speed regulation range, suitability for transmission in different power ranges, good working safety, easy realization of overload protection and the like, and is particularly widely applied in the field of engineering machinery. However, the working performance of the hydraulic transmission is susceptible to temperature changes, and the hydraulic transmission is not suitable for working at too high or too low temperature, so that the heat dissipation of the hydraulic system of the construction machine is a very important part in the hydraulic design. The hydraulic excavator is a representative product of engineering machinery, and is called as a pearl on the crown of the engineering machinery industry due to the complexity and high technical content of a hydraulic system.
Particularly, when the excavator works in a high and cold environment, the excavator needs to be heated by necessary hydraulic oil when being started, the rotating speed of a fan of a traditional heat dissipation system is constant, so that the temperature is slowly increased after the excavator is started, and the energy consumption for heating the hydraulic oil is large; the traditional independent heat dissipation system is mainly composed of variable pumps, elements are complex, cost is high, and due to the characteristics of the variable pumps, full-range control cannot be achieved. The operation of the cooling system is intelligently controlled according to the temperature, so that the problem that the cooling system does not need to operate is solved, the important functions of energy saving and the like can be achieved, and the intelligent control and optimal configuration of the engineering machinery are important subjects.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model aims at providing a by the hydraulic system of temperature control cooling system flow distribution, control cooling system's motion according to the temperature variation, control intelligence, safety, steady, reliable, energy-conservation more, be suitable for popularization and popularization.
In order to solve the technical problem, the utility model discloses realize according to following technical scheme:
the utility model provides a hydraulic system with flow distribution of a temperature control heat dissipation system, which comprises a prime motor, a hydraulic pump, a safety valve, an overflow valve, a proportional valve, a fan motor and a back pressure valve; the prime mover is connected with a hydraulic pump; an oil inlet of the hydraulic pump is connected with the oil tank, and an oil outlet of the hydraulic pump is connected with the proportional valve; the proportional valve is connected with a fan motor on one hand, and the fan motor is connected with an oil inlet of the back pressure valve; on the other hand, the proportional valve is directly connected with the oil inlet end of the back pressure valve; the oil outlet end of the back pressure valve is connected with an oil tank; the safety valve is connected between an oil outlet of the hydraulic pump and the oil tank; the overflow valve is connected between the reversing valve and the oil tank.
In some embodiments, the oil inlet end of the overflow valve is connected to the hydraulic control end on the return spring side of the proportional valve, and the oil outlet end of the overflow valve is connected to the oil tank.
In some embodiments, the relief valve is a heat sensitive relief valve.
In some embodiments, the hydraulic pump is a fixed displacement pump.
The utility model discloses the second aspect provides an engineering vehicle, has foretell hydraulic system by temperature control cooling system flow distribution.
In some embodiments, the work vehicle comprises a hydraulic excavator.
The utility model discloses beneficial effect:
(1) A by hydraulic system of temperature control cooling system flow distribution, control mode is hydraulic control, control is simple and convenient, dynamic characteristic is good.
(2) A hydraulic system by temperature control cooling system flow distribution, the overflow valve adopts the thermal-sensitive overflow valve, characteristics such as overflow valve rated pressure is in given limit with temperature proportional, temperature selection wide range, repeatability is high.
(3) A by hydraulic system of temperature control cooling system flow distribution, the infinitely variable control of fan motor's flow distribution can be realized in the use of proportional valve, fan motor's rotational speed receives system fluid temperature variation to influence, makes this system more intelligent, reduces the energy consumption of alpine region heating hydraulic oil.
(4) A hydraulic system by temperature control cooling system flow distribution, adopt quantitative hydraulic pump, adopt the variable pump to compare with traditional independent cooling system more, the component is simple relatively and the cost is lower, can realize the control of full scope.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention, are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. It is obvious that the drawings in the following description are only some embodiments, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
In the drawings:
fig. 1 is a schematic diagram of the hydraulic system for flow distribution by a temperature-controlled heat dissipation system of the present invention;
in the figure: a prime mover 1; a hydraulic pump 2; a safety valve 3; an overflow valve 4; a proportional valve 5; a fan motor 6; a back pressure valve 7.
It should be noted that the drawings and the description are not intended to limit the scope of the inventive concept in any way, but rather to illustrate the inventive concept by those skilled in the art with reference to specific embodiments.
Detailed Description
In order to make the implementation objects, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be described in more detail below with reference to the accompanying drawings in the embodiments of the present invention. In the drawings, the same or similar reference numerals denote the same or similar components or components having the same or similar functions throughout. The described embodiments are only some, but not all embodiments of the invention. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention. Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
As shown in fig. 1, a hydraulic system for flow distribution by a temperature controlled radiator system includes a prime mover 1, a hydraulic pump 2, a safety valve 3, an overflow valve 4, a proportional valve 5, a fan motor 6, a back pressure valve 7; the prime mover 1 is connected with the hydraulic pump 2, the oil discharged from the hydraulic pump 2 passes through the proportional valve 5, one path of hydraulic oil drives the fan motor 6 to move and then returns to the oil tank through the backpressure valve 7, the other path of hydraulic oil directly returns to the oil tank through the backpressure valve 7, the safety valve 3 is connected between the oil outlet of the hydraulic pump 2 and the oil tank, the oil inlet end of the overflow valve 4 is connected with the hydraulic control end on the reset spring side of the proportional valve 5, and the oil outlet end of the overflow valve 4 is connected with the oil tank.
As shown in fig. 1, the valve core of the proportional valve 5 moves due to the change of the pressure difference between the upper and lower control ends, thereby controlling the stepless regulation of the flow distribution of the output oil path, and enabling the rotating speed of the fan motor 6 to change along with the change of the temperature of the system oil.
Further scheme: the hydraulic pump 2 adopts a fixed displacement pump, compared with a traditional independent radiating system which adopts a variable displacement pump, the hydraulic pump has relatively simple elements and lower cost, and can realize the control in a full range.
Further scheme: the overflow valve 4 is a thermal overflow valve, and the rated pressure of the overflow valve 4 is proportional to the temperature within a given limit, so that the temperature becomes a dependent variable of the system.
Further scheme: the valve core of the proportional valve 5 moves due to the change of the pressure difference of the control ends at the upper side and the lower side, thereby controlling the stepless regulation of the flow distribution of the output oil way and leading the rotating speed of the fan motor 6 to change along with the change of the temperature of the oil liquid of the system.
In fig. 1, the oil inlet end of the overflow valve 4 is connected to the hydraulic control end of the return spring side of the proportional valve 5, the oil outlet end of the overflow valve 4 is connected to the oil tank, the overflow valve 4 is a thermal overflow valve, the rated pressure of the overflow valve is proportional to the temperature within a given limit, the temperature is lower than the temperature regulation range of the overflow valve 4, the overflow valve 4 is opened under the action of the return spring to release the hydraulic oil to the oil tank, the orifice is communicated with the hydraulic control ends on both sides of the proportional valve 5, at this time, the pressure on the hydraulic control end a side of the proportional valve 5 is greater than the pressure on b side, the pressure difference is used as a signal for increasing the electromagnet current of the proportional valve 5, under the combined action of the pressure difference and the electromagnet current increase of the proportional valve 5, the valve core moves down, the flow output by the proportional valve 5 to the fan motor 6 decreases, the flow on the other side of the return to the oil tank increases, and the rotation speed of the fan motor 6 decreases; when the temperature is higher than the minimum value of the temperature regulation range of the overflow valve 4, the opening rated pressure of the overflow valve 4 is increased along with the temperature rise, for a hydraulic oil path of the constant displacement pump, when the pressure does not reach the opening pressure of the overflow valve 4, the overflow valve 4 is closed, the pressure of the side a pressure of the hydraulic control end of the proportional valve 5 is balanced with the pressure of the side b pressure, the electromagnet current of the proportional valve 5 is reduced, the valve core of the proportional valve 5 moves upwards, the flow of the output flow of the proportional valve 5 flowing to the fan motor 6 is increased, the flow of the other flow flowing back to the oil tank is reduced, and the rotating speed of the fan motor 6 is increased, so that the flow distribution of the engineering vehicle by a temperature control heat dissipation system is realized.
To sum up, hydraulic system by temperature control cooling system flow distribution realized using the temperature to control the action of engineering vehicle cooling system as the variable, control technique is last more intelligent, safe, steady, reliable, energy-conserving, is suitable for popularization and popularization.
The utility model also provides an engineering vehicle has foretell hydraulic system by temperature control cooling system flow distribution. Wherein, the engineering vehicle comprises a hydraulic excavator.
In the description provided herein, numerous specific details are set forth. It is understood, however, that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.
Furthermore, those skilled in the art will appreciate that although some embodiments described herein include some features included in other embodiments instead of others, combinations of features of different embodiments are also meant to be within the scope of the invention and form different embodiments. For example, in the above embodiments, those skilled in the art can combine the technical solutions and technical problems to be solved by the present application.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and although the present invention has been disclosed with reference to the preferred embodiment, it is not intended to limit the present invention, and any person skilled in the art can make some changes or modifications to equivalent embodiments without departing from the scope of the present invention, and any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention will still fall within the scope of the present invention.
Claims (6)
1. A hydraulic system for controlling flow distribution of a heat dissipation system by temperature, characterized in that:
comprises a prime motor, a hydraulic pump, a safety valve, an overflow valve, a proportional valve, a fan motor and a back pressure valve;
the prime mover is connected with the hydraulic pump;
an oil inlet of the hydraulic pump is connected with the oil tank, and an oil outlet of the hydraulic pump is connected with the proportional valve;
the proportional valve is connected with a fan motor on one hand, and the fan motor is connected with an oil inlet of the back pressure valve;
the proportional valve is directly connected with the oil inlet end of the back pressure valve on the other hand;
the oil outlet end of the back pressure valve is connected with an oil tank;
the safety valve is connected between an oil outlet of the hydraulic pump and the oil tank;
the overflow valve is connected between the reversing valve and the oil tank.
2. The hydraulic system of claim 1, wherein the flow distribution from the temperature controlled heat rejection system is:
the oil inlet end of the overflow valve is connected with the hydraulic control end on the side of the proportional valve reset spring, and the oil outlet end of the overflow valve is connected with the oil tank.
3. The hydraulic system for flow distribution by a temperature controlled heat dissipation system of claim 2, wherein:
the overflow valve is a thermal overflow valve.
4. The hydraulic system of claim 1, wherein the flow distribution from the temperature controlled heat rejection system is:
the hydraulic pump adopts a fixed displacement pump.
5. An engineering vehicle, characterized in that:
a hydraulic system having a flow distribution from a temperature controlled heat rejection system as claimed in any one of claims 1 to 4.
6. The work vehicle of claim 5, wherein:
the work vehicle includes a hydraulic excavator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222146091.2U CN217873561U (en) | 2022-08-16 | 2022-08-16 | Hydraulic system for controlling flow distribution of cooling system by temperature and engineering vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222146091.2U CN217873561U (en) | 2022-08-16 | 2022-08-16 | Hydraulic system for controlling flow distribution of cooling system by temperature and engineering vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217873561U true CN217873561U (en) | 2022-11-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202222146091.2U Active CN217873561U (en) | 2022-08-16 | 2022-08-16 | Hydraulic system for controlling flow distribution of cooling system by temperature and engineering vehicle |
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| Country | Link |
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| CN (1) | CN217873561U (en) |
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2022
- 2022-08-16 CN CN202222146091.2U patent/CN217873561U/en active Active
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