Hydraulic drive header heat dissipation system, header and harvester

Abstract

The utility model relates to the technical field of header heat dissipation, in particular to a hydraulic drive header heat dissipation system, a header and a harvester. The cooling system comprises a constant pressure pump, a hydraulic motor, a throttle valve, an electric proportional temperature control valve, a radiator and an oil tank, an inlet of the constant-pressure pump and the oil tank, an outlet of the constant-pressure pump and an inlet of the hydraulic motor, an outlet of the hydraulic motor and an inlet of the electric proportional temperature control valve, an outlet of the electric proportional temperature control valve and an inlet of the radiator, and an outlet of the radiator and the oil tank are respectively communicated through hydraulic pipelines; and a throttle valve connected in parallel with the electric proportional temperature control valve is also arranged between the outlet of the hydraulic motor and the oil tank. According to the technical scheme, the constant pressure pump is adopted, stepless speed regulation and overload protection can be achieved, overflow loss is reduced, and the system is more energy-saving; the mode that the throttling valve and the electric proportional temperature control valve jointly adjust the heat dissipation flow is adopted, the adaptive environment temperature working condition is wider, and the adjustable temperature range is large.

Description

TECHNICAL FIELD

[0001] The utility model relates to a cutting platform heat dissipation technical field, especially in kind of hydraulic drive cutting platform heat dissipation system, cutting platform and harvester. BACKGROUND

[0002] In the hydraulic system, when oil liquid passes through valve, pump, hydraulic cylinder and other hydraulic components, there will be leakage in the micro hole due to the machining and assembly gap of parts, especially from the high pressure cavity to the low pressure cavity, which will cause high pressure loss, and the generated pressure loss will be converted into heat, so that the oil temperature of the hydraulic system is increased, and the hydraulic oil has viscosity-temperature characteristics, the higher the temperature, the thinner the oil, and the leakage of the whole system will also increase, so it is very important to dissipate heat for the hydraulic system.

[0003] Agricultural machinery is applied in the whole country, and its working environment is relatively poor, and for the harvesting machinery, hydraulic drive can realize overload protection and stepless speed regulation due to its high power density, so it is widely used.

[0004] Most of the cutting platform driving devices of large harvesting machinery adopt hydraulic drive at present, which can cancel the complex chain and belt transmission compared with the traditional mechanical drive, is lighter in weight, can release higher torque, and can realize overload protection, but the cutting platform as the input device of the harvesting machinery needs to bear large load changes, which will inevitably cause high heat of the hydraulic system, so the cutting platform driving device needs to be separately cooled.

[0005] The cutting platform device adopting hydraulic drive at present does not use heat dissipation or the heat dissipation system uses unadjustable directional and quantitative heat dissipation, because the hydraulic motor is the execution device of the hydraulic system, the energy loss caused by internal leakage is serious under the environment with variable load, and the oil leakage of the hydraulic motor is generally separately transported to the radiator for heat dissipation. Therefore, it cannot be applied to various complex temperature environments, especially in areas with high temperature, temperature automatic adjustment cannot be realized, the thermal equilibrium temperature is high, and a higher heat dissipation power radiator must be replaced. Moreover, the long-term high temperature of the hydraulic oil will cause the sealing element to age prematurely, which will easily cause oil leakage failure, thereby increasing the maintenance cost and time cost. UTILITY MODEL CONTENTS

[0006] The utility model aims at providing a kind of hydraulic drive cutting platform heat dissipation system, can adapt to different working environments, also can realize stepless speed regulation and overload protection.

[0007] Firstly, the utility model provides a kind of hydraulic drive cutting platform heat dissipation system, including constant pressure pump, hydraulic motor, throttle valve, electric proportional temperature control valve, radiator and oil tank;

[0008] The inlet of the constant pressure pump is communicated with the oil tank through a hydraulic pipeline, the outlet of the constant pressure pump is communicated with the inlet of the hydraulic motor through a hydraulic pipeline, the outlet of the hydraulic motor is communicated with the inlet of the electric proportional temperature control valve through a hydraulic pipeline, the outlet of the electric proportional temperature control valve is communicated with the inlet of the radiator through a hydraulic pipeline, and the outlet of the radiator is communicated with the oil tank through a hydraulic pipeline.

[0009] The throttling valve is further arranged in parallel with the electric proportional temperature control valve between the outlet of the hydraulic motor and the oil tank, and the outlet of the throttling valve is connected with the pressure relief port of the electric proportional temperature control valve and then communicated with the oil tank.

[0010] In the preferred embodiment, an oil suction filter is further arranged on the hydraulic pipeline between the inlet of the constant pressure pump and the oil tank.

[0011] In the preferred embodiment, the outlet of the throttling valve is connected with the pressure relief port of the electric proportional temperature control valve and then communicated with the oil tank through an oil return filter.

[0012] In the preferred embodiment, an oil temperature sensor for measuring the temperature of the hydraulic oil in the oil tank is further included.

[0013] In the preferred embodiment, a controller is further included, which is electrically connected with the oil temperature sensor and the electric proportional temperature control valve respectively.

[0014] In the preferred embodiment, a high-pressure overflow valve in parallel with the hydraulic motor is further included.

[0015] In the preferred embodiment, a bypass valve is further arranged in parallel between the inlet and the outlet of the electric proportional temperature control valve.

[0016] In the preferred embodiment, the throttling valve is a hand-operated throttling valve.

[0017] In the second aspect, the utility model provides a cutting platform, including the hydraulic drive cutting platform heat dissipation system.

[0018] In the third aspect, the utility model provides a harvester, including the cutting platform.

[0019] The utility model has the following beneficial effects:

[0020] The constant pressure pump can realize stepless speed regulation and overload protection, reduce overflow loss, and the system is more energy-saving.

[0021] The throttling valve and the electric proportional temperature control valve are used to jointly regulate the heat dissipation flow, so that the environmental temperature working condition is more suitable, and the adjustable temperature range is larger. DRAWINGS

[0022] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly introduced as follows. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained from these drawings without creative labor.

[0023] Figure 1 The schematic diagram of the hydraulic system provided by the embodiments of the present application is shown in the figure.

[0024] Figure label:

[0025] 1-constant pressure pump; 2-oil suction filter; 3-oil return filter;

[0026] 4-oil temperature sensor; 5-radiator; 6-electric proportional temperature control valve;

[0027] 7-bypass valve; 8-hand regulating valve; 9-high pressure overflow valve;

[0028] 10-hydraulic motor. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme of the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and marked in the drawings can be arranged and designed in various different configurations.

[0030] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of the present application.

[0031] It should be noted that: similar labels and letters represent similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0032] In the description of the utility model, it needs to be explained that, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly placed when the utility model product is used, and are merely for the convenience of describing the utility model and simplifying the description, and thus cannot be understood as limiting the utility model by indicating or implying that the indicated device or element must have a specific orientation, be constructed in a specific orientation and be operated, and thus cannot be understood as limiting the utility model. In addition, the terms "first", "second", "third" and the like are merely used for distinguishing the description, and cannot be understood as indicating or implying relative importance.

[0033] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components must be absolutely horizontal or overhanging, but can be slightly inclined. For example, "horizontal" merely means that it is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0034] In the description of the utility model, it also needs to be explained that, unless otherwise explicitly specified and limited, the terms "setting", "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0035] Some embodiments of the utility model will be described in detail below in combination with the drawings. In the case of no conflict, the following examples and features in the examples can be combined with each other.

[0036] Figure 1 The schematic diagram of the hydraulic system provided by the utility model embodiment is shown. As shown in the figure, Figure 1 The hydraulic drive cutting platform heat dissipation system provided by the utility model embodiment comprises a constant pressure pump 1, a hydraulic motor 10, a hand regulating flow valve 8, an electric proportional temperature control valve 6, a radiator 5 and an oil tank.

[0037] The inlet of the constant pressure pump 1 and the oil tank, the outlet of the constant pressure pump 1 and the inlet of the hydraulic motor 10, the outlet of the hydraulic motor 10 and the inlet of the electric proportional temperature control valve 6, the outlet of the electric proportional temperature control valve 6 and the inlet of the radiator 5, and the outlet of the radiator 5 and the oil tank are respectively communicated through the hydraulic pipeline;

[0038] A hand regulating flow valve 8 is further arranged in parallel with the electric proportional temperature control valve 6 between the outlet of the hydraulic motor 10 and the oil tank, and the outlet of the hand regulating flow valve 8 is connected with the pressure relief port of the electric proportional temperature control valve 6 and then communicated with the oil tank.

[0039] An oil suction filter 2 is further arranged on the hydraulic pipeline between the inlet of the constant pressure pump 1 and the oil tank, so as to filter the hydraulic oil entering the constant pressure pump 1.

[0040] The outlet of the hand regulating flow valve 8 is connected with the pressure relief port of the electric proportional temperature control valve 6, and then communicates with the oil tank through the oil return filter 3, so as to filter the hydraulic oil returning to the oil tank.

[0041] The oil temperature sensor 4 for measuring the temperature of the hydraulic oil in the oil tank and a controller are further included, the controller is electrically connected with the oil temperature sensor 4 and the electric proportional temperature control valve 6 respectively, and is used for adjusting the opening of the electric proportional temperature control valve 6 according to the value fed back by the oil temperature sensor 4.

[0042] A high pressure overflow valve 9 is further included in parallel with the hydraulic motor 10, and a bypass valve 7 is arranged in parallel between the inlet and the outlet of the electric proportional temperature control valve 6.

[0043] The hand regulating flow valve 8 can manually adjust the flow rate of the hydraulic oil entering the radiator 5, and can be adjusted according to the ambient temperature, that is, when the temperature is high, the flow rate is adjusted to be small, so that more hydraulic oil enters the radiator 5 and the heat dissipation speed is accelerated; when the temperature is low, the flow rate is adjusted to be large, so that more hydraulic oil directly returns to the oil tank through the hand regulating flow valve 8 and the return filter 3, and does not pass through the radiator 5, which is more conducive to system cooling.

[0044] The electric proportional temperature control valve 6 can automatically adjust the flow rate of the hydraulic oil entering the radiator 5 according to the temperature signal provided by the oil temperature sensor 4. When the temperature is high, the valve core of the electric proportional temperature control valve 6 is pushed to the middle position around the electromagnet, part of the oil enters the radiator 5, and part of the oil directly returns to the oil tank; when the system temperature is very high, the valve core is pushed to the limit position, and all the flow rate enters the radiator 5 for heat dissipation, so that the system heat dissipation flow rate is maximized, and when the radiator 5 is blocked, the bypass valve 7 can be used for pressure relief to protect the radiator 5. The system can adjust the flow rate of the hydraulic oil entering the radiator according to the temperature of the hydraulic oil.

[0045] The constant pressure pump adopted in the application can realize stepless speed regulation and overload protection, reduce overflow loss, and the system is more energy-saving.

[0046] The way of adjusting the heat dissipation flow rate by the throttle valve and the electric proportional temperature control valve together can adapt to a wider range of ambient temperature working conditions and a larger adjustable temperature range.

[0047] The way of adjusting the flow rate manually and automatically together can adapt to a wider range of ambient temperature working conditions and a larger adjustable temperature range, and can ensure that the temperature of the hydraulic oil remains at a suitable thermal equilibrium temperature.

[0048] The embodiment further provides a cutting platform comprising the hydraulic driving cutting platform heat dissipation system.

[0049] The embodiment provides a harvester, comprising the header.

[0050] Since the hydraulic drive header heat dissipation system is adopted, the header and the harvester also have all the technical effects of the hydraulic drive header heat dissipation system, which will not be repeated here.

[0051] The above is only preferred embodiment of the present application, and is not used to limit the present application, and the present application can have various changes and variations for those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A hydraulic drive header heat dissipation system, characterized in that, The system comprises a constant pressure pump, a hydraulic motor, a throttle valve, an electric proportional temperature control valve, a radiator and an oil tank. The inlet of the constant pressure pump is communicated with the oil tank through a hydraulic pipeline, the outlet of the constant pressure pump is communicated with the inlet of the hydraulic motor through a hydraulic pipeline, the outlet of the hydraulic motor is communicated with the inlet of the electric proportional temperature control valve through a hydraulic pipeline, the outlet of the electric proportional temperature control valve is communicated with the inlet of the radiator through a hydraulic pipeline, and the outlet of the radiator is communicated with the oil tank through a hydraulic pipeline. The throttle valve is arranged in parallel with the electric proportional temperature control valve between the outlet of the hydraulic motor and the oil tank, and the outlet of the throttle valve is connected with the pressure relief port of the electric proportional temperature control valve and then communicated with the oil tank.

2. The hydraulic drive head cooling system of claim 1, wherein, An oil suction filter is arranged on the hydraulic pipeline between the inlet of the constant pressure pump and the oil tank.

3. The hydraulic drive head cooling system of claim 1, wherein, The outlet of the throttle valve is connected with the pressure relief port of the electric proportional temperature control valve, and then communicated with the oil tank through an oil return filter.

4. The hydraulic drive head cooling system of claim 1, wherein, An oil temperature sensor is further arranged for measuring the temperature of the hydraulic oil in the oil tank.

5. The hydraulic drive head cooling system of claim 4, wherein, A controller is further arranged and electrically connected with the oil temperature sensor and the electric proportional temperature control valve.

6. The hydraulic drive head cooling system of claim 1, wherein, A high pressure overflow valve is further arranged in parallel with the hydraulic motor.

7. The hydraulic drive head cooling system of claim 1, wherein, A bypass valve is further arranged in parallel between the inlet and the outlet of the electric proportional temperature control valve.

8. The hydraulic drive head cooling system of claim 1, wherein, The throttle valve is a hand-operated throttle valve.

9. A header characterized by, The system further comprises the hydraulic drive cutting platform heat dissipation system according to any one of claims 1-8.

10. A harvester characterized by The cutting platform according to claim 9.

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