Fan blowback system for rice machine and rice machine

Abstract

The utility model provides a fan blowback system for a rice machine and the rice machine, the fan blowback system for the rice machine comprises a hydraulic stepless speed change device, the hydraulic stepless speed change device comprises an oil supplementing pump capable of continuously outputting hydraulic oil; the reverse blowing valve is communicated with the oil supplementing pump through a pipeline; and the hydraulic reversing fan is communicated with the reverse blowing valve, and under the condition that the hydraulic oil enters the hydraulic reversing fan, the wind direction of the hydraulic reversing fan is changed. The fan blowback system for the rice machine and the rice machine can solve the problem of how to ensure the normal operation of a heat dissipation system of the whole machine under the condition of not increasing the hydraulic consumption power.

Description

Technical Field

[0001] The present application relates to the technical field of fan systems for rice harvesters, and in particular to a fan back-blowing system for a rice harvester and a rice harvester. Background Art

[0002] At present, the radiator of rice harvesters is located at a low position, and the wind direction of the engine fan is suction. When the rice harvester is operating, there is a lot of dust and floating grains around it. The suction of the fan will cause the debris to be adsorbed on the dust cover, resulting in increased wind resistance entering the radiator, affecting the heat dissipation capacity. In severe cases, the radiator temperature will be too high, and even cause shutdown. This seriously affects the reliability and operating efficiency of the whole machine, and then affects the user's income.

[0003] When the existing rice harvester is in operation, if a lot of dust accumulates on the radiator surface, the user needs to stop the machine and use tools to clean the dust cover and the debris on the radiator surface, which increases the labor intensity of the user and affects the operating efficiency of the whole machine. Therefore, how to ensure the normal operation of the whole machine cooling system without increasing the hydraulic power consumption has become an urgent problem to be solved. Utility Model Content

[0004] In view of this, the purpose of the present application is to provide a fan back-blowing system and a rice harvester for a rice harvester, so as to solve the problem of how to ensure the normal operation of the heat dissipation system of the whole machine without increasing the hydraulic power consumption.

[0005] According to the first aspect of the utility model, a fan back-blowing system for a rice harvester is provided, wherein the fan back-blowing system for the rice harvester comprises: a hydraulic continuously variable speed transmission device, the hydraulic continuously variable speed transmission device comprises an oil replenishing pump capable of continuously outputting hydraulic oil; a back-blowing valve, which is connected to the oil replenishing pump through a pipeline; and a hydraulic reversing fan, which is connected to the back-blowing valve, and when the hydraulic oil enters the hydraulic reversing fan, the wind direction of the hydraulic reversing fan changes.

[0006] Preferably, the back-blow valve includes: a valve stem, which is arranged inside the back-blow valve, and the valve stem can move along a first direction to a preset position and reset from the preset position; an oil inlet, which is connected to the oil replenishment pump through a pipeline; an oil outlet, which is connected to the hydraulic reversing fan through a pipeline, and when the valve stem moves to the preset position, the oil inlet and the oil outlet are connected through the valve stem; and an oil return port, which is connected to the oil tank, and when the valve stem is reset, the oil inlet and the oil return port are connected through the valve stem.

[0007] Preferably, the valve stem is a two-position three-way reversing valve.

[0008] Preferably, an overflow valve is further provided in the blowback valve, and the overflow valve is connected to the oil tank.

[0009] Preferably, the hydraulic reversing fan comprises a fan oil inlet pipe and a fan body, a first end of the fan oil inlet pipe is communicated with the back-blow valve, and a second end of the fan oil inlet pipe is communicated with the fan body.

[0010] Preferably, a blade pressure plate is provided in the fan body, and when the hydraulic oil enters the fan body, the blade pressure plate is deflected.

[0011] Preferably, the hydraulic reversing fan comprises a plurality of blades, and the plurality of blades are connected to the blade pressure plate. The blades can deflect along with the blade pressure plate, and the blades deflect from 30° to -25°, thereby changing the wind direction of the hydraulic reversing fan.

[0012] Preferably, a return spring is also provided in the fan body for driving the fan blade pressure plate to return to its original position.

[0013] Preferably, the pressure of the hydraulic oil output by the oil replenishment pump is 1.7 MPa to 2.5 MPa.

[0014] According to a second aspect of the utility model, a rice harvester is provided, wherein the rice harvester comprises the fan back-blowing system for the rice harvester as described above.

[0015] The fan back-blowing system and rice harvester of the utility model embodiment include a hydraulic stepless speed change device including an oil replenishing pump capable of continuously outputting hydraulic oil. After the rice harvester is started, the oil replenishing pump can continuously output hydraulic oil without increasing the hydraulic power consumption of the rice harvester. The back-blowing valve is connected to the oil replenishing pump through a pipeline, and the hydraulic reversing fan is connected to the back-blowing valve, so that the hydraulic oil can be delivered to the hydraulic reversing fan. When the hydraulic oil enters the hydraulic reversing fan, the blades of the hydraulic reversing fan are deflected to change the wind direction, and then the state of suction is converted to the state of blowing, so as to realize fan back-blowing, remove debris on the dust cover and the surface of the radiator, and avoid the radiator from overheating. In this way, the problem of how to ensure the normal operation of the cooling system of the whole machine without increasing the hydraulic power consumption can be effectively solved.

[0016] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a schematic diagram of a back-blowing valve of a fan back-blowing system for a rice harvester according to the utility model.

[0019] Figure 2 It is a schematic diagram of a fan back-blowing system for a rice harvester according to the utility model.

[0020] Figure 3 The utility model is a schematic diagram of a hydraulic reversing fan of a fan back-blowing system for a rice harvester according to the utility model.

[0021] Figure 4 The utility model is a schematic structural diagram of a hydraulic reversing fan of a fan back-blowing system for a rice harvester according to the utility model.

[0022] Figure markings: 1-hydraulic continuously variable speed device; 10-oil replenishing pump; 2-blowback valve; 20-valve stem; 21-oil inlet; 22-oil outlet; 23-oil return port; 24-overflow valve; 3-hydraulic reversing fan; 30-fan body; 301-blades; 31-fan oil inlet pipe; 32-blade pressure plate; 33-reset spring. DETAILED DESCRIPTION

[0023] The following specific embodiments are provided to help the reader obtain a comprehensive understanding of the methods, devices and / or systems described herein. However, after understanding the disclosure of the present application, various changes, modifications and equivalents of the methods, devices and / or systems described herein will be apparent. For example, the order of operations described herein is merely an example, and is not limited to the order set forth herein, but in addition to the operations that must occur in a particular order, changes that will be apparent after understanding the disclosure of the present application may be made. In addition, in order to improve clarity and brevity, descriptions of features known in the art may be omitted.

[0024] The features described herein may be implemented in different forms and should not be interpreted as being limited to the examples described herein. Rather, the examples described herein have been provided only to illustrate some of the many possible ways of implementing the methods, devices and / or systems described herein that will be apparent after understanding the disclosure of the present application.

[0025] Throughout the specification, when an element (such as a layer, a region, or a substrate) is described as being “on”, “connected to”, “bound to”, “over”, or “covering” another element, it may be directly “on”, “connected to”, “bound to”, “over”, or “covering” another element, or one or more other elements may be present between them. In contrast, when an element is described as being “directly on”, “directly connected to”, “directly bound to”, “directly over”, or “directly covering” another element, there may be no other elements present between them.

[0026] As used herein, the term "and / or" includes any one of the associated listed items and any combination of any two or more items.

[0027] Although terms such as "first," "second," and "third" may be used herein to describe various members, components, regions, layers, or portions, these members, components, regions, layers, or portions are not limited by these terms. Rather, these terms are only used to distinguish one member, component, region, layer, or portion from another member, component, region, layer, or portion. Therefore, without departing from the teachings of the examples described herein, the first member, component, region, layer, or portion referred to may also be referred to as the second member, component, region, layer, or portion.

[0028] For ease of description, spatial relational terms such as "above", "upper", "below", and "lower" may be used herein to describe the relationship of one element to another element as shown in the accompanying drawings. Such spatial relational terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the accompanying drawings. For example, if the device in the accompanying drawings is turned over, an element described as being "above" or "upper" relative to another element will subsequently be "below" or "lower" relative to the other element. Therefore, the term "above" includes both "above" and "below" orientations depending on the spatial orientation of the device. The device may also be positioned in other ways (e.g., rotated 90 degrees or in other orientations), and the spatial relational terms used herein will be interpreted accordingly.

[0029] The terms used herein are only used to describe various examples and are not used to limit the examples. Unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. The terms "include", "comprising" and "having" list the existence of the stated features, quantities, operations, components, elements and / or their combinations, but do not exclude the existence or addition of one or more other features, quantities, operations, components, elements and / or their combinations.

[0030] Variations in the shapes shown in the drawings may occur due to manufacturing techniques and / or tolerances. Therefore, the examples described herein are not limited to the specific shapes shown in the drawings but include variations in shapes that occur during manufacturing.

[0031] The features of the examples described herein may be combined in various ways that will be apparent after understanding the disclosure of the present application. In addition, although the examples described herein have various configurations, other configurations are possible as will be apparent after understanding the disclosure of the present application.

[0032] like Figures 1 to 4 As shown, according to the first aspect of the utility model, a fan back-blowing system for a rice harvester is provided. The fan back-blowing system for a rice harvester comprises a hydraulic continuously variable speed device 1, a back-blowing valve 2 and a hydraulic reversing fan 3.

[0033] In the following description, reference will be made to Figures 1 to 4 The specific structure of the above components of the fan backblowing system for the rice harvester and the connection relationship of the above components are specifically described.

[0034] like Figure 1 As shown, in an embodiment, the hydraulic continuously variable transmission device 1 of the rice machine may include an oil replenishment pump 10 that can continuously output hydraulic oil. Specifically, after the rice machine is started, the oil replenishment pump 10 can continuously output hydraulic oil, that is, the oil replenishment pump 10 continuously generates overflow, and will not increase the hydraulic power consumption of the rice machine. The back-blowing valve 2 can be connected to the oil replenishment pump 10 through a pipeline, and the hydraulic reversing fan 3 can be connected to the back-blowing valve 2, so that the hydraulic oil can be delivered to the hydraulic reversing fan 3. When the hydraulic oil enters the hydraulic reversing fan 3, the wind direction of the hydraulic reversing fan 3 changes, and then changes from the suction state to the blowing state, so as to realize fan backblowing, remove debris on the dust cover and the surface of the radiator, and avoid the radiator from overheating.

[0035] Preferably, Figure 1 and Figure 2As shown, in an embodiment, the blowback valve 2 may include a valve stem 20, an oil inlet 21, an oil outlet 22, and an oil return port 23. The valve stem 20 may be arranged at the center of the inside of the blowback valve 2. A flow channel is arranged on the valve stem 20 for the hydraulic oil to flow. The operator can control the blowback valve 2 to be energized through a button on the operation panel of the rice machine. The valve stem 20 can be moved in a first direction (which can be as shown in FIG. Figure 1 The oil inlet 21 can be connected to the oil replenishment pump 10 through a pipeline, so that the hydraulic oil output by the oil replenishment pump 10 can be transported to the back-blowing valve 2 through the pipeline. The oil outlet 22 can be connected to the hydraulic reversing fan 3 through a pipeline, so that the hydraulic oil in the back-blowing valve 2 can be transported to the hydraulic reversing fan 3 through the pipeline.

[0036] Specifically, Figure 1 and Figure 2 As shown, in the embodiment, when the valve stem 20 moves to the preset position (i.e., when the valve stem 20 moves to the right for reversing), the oil inlet 21 is connected to the oil outlet 22 through the flow channel on the valve stem 20, so that the hydraulic oil output by the oil replenishment pump 10 can be delivered to the hydraulic reversing fan 3 through the oil inlet 21, the valve stem 20, and the oil outlet 22 in sequence. The hydraulic reversing fan 3 is affected by the hydraulic oil and the fan blades 301 are deflected, so that the wind direction of the hydraulic reversing fan 3 changes, and the state of suction is converted to the state of blowing. The oil return port 23 can be connected to the oil tank of the rice machine. When the valve stem 20 is reset (i.e., when the valve stem 20 moves to the left for resetting), the oil inlet 21 is connected to the oil return port 23 through the flow channel on the valve stem 20, so that the hydraulic oil output by the oil replenishment pump 10 flows into the oil tank through the oil inlet 21, the valve stem 20, and the oil return port 23 in sequence, and the wind direction of the hydraulic reversing fan 3 remains in the state of suction.

[0037] More preferably, Figure 1 and Figure 2 As shown, in the embodiment, the valve stem 20 can be a two-position three-way reversing valve, which is used to control the connectivity between the oil inlet 21, the oil outlet 22 and the oil return port 23 in the blowback valve 2.

[0038] In addition, preferably, Figure 1 and Figure 2 As shown, in the embodiment, a relief valve 24 may be further provided in the back-blowing valve 2. One end of the two-position three-way valve may be connected to the relief valve 24, and the relief valve 24 may be connected to the oil tank. The relief valve 24 can limit the maximum pressure of the fan back-blowing system for the rice harvester to ensure that the system pressure is within a suitable design range.

[0039] Preferably, Figure 3 and Figure 4 As shown, in an embodiment, the hydraulic reversing fan 3 may include a fan oil inlet pipe 31 and a fan body 30. The fan oil inlet pipe 31 may be a cylindrical straight pipe. The first end of the fan oil inlet pipe 31 may be connected to the blowback valve 2, so that the hydraulic reversing fan 3 is connected to the oil replenishment pump 10, so that the hydraulic oil is delivered to the hydraulic reversing fan 3. The second end of the fan oil inlet pipe 31 may be connected to the middle of the fan body 30, so that the hydraulic oil can be delivered to the fan body 30.

[0040] Preferably, Figure 4 As shown, in an embodiment, a blade pressure plate 32 may be provided in the fan body 30, and the blades 301 of the hydraulic reversing fan 3 may be fixedly mounted on the blade pressure plate 32. Preferably, the hydraulic reversing fan 3 may include a plurality of blades 301, and the blades 301 are evenly spaced and mounted on the periphery of the blade pressure plate 32. Specifically, the number of blades 301 may be five as in the embodiment. After the hydraulic oil enters the fan body 30, the hydraulic oil can drive the blade pressure plate 32 to deflect, thereby causing the blades 301 mounted on the blade pressure plate 32 to deflect (that is, the blades 301 can deflect with the blade pressure plate 32), so that the hydraulic reversing fan 3 can switch between the suction state and the blowing state without changing the direction of rotation.

[0041] Preferably, Figure 4 As shown, in the embodiment, a return spring 33 may be further provided in the fan body 30. Since the pressure of the hydraulic oil output by the oil replenishment pump 10 is relatively large, the first end of the return spring 33 may abut against the oil cylinder seat, and the second end of the return spring 33 may abut against the spring base. The return spring 33 is able to apply elastic force to the blade pressure plate 32, so that the blade pressure plate 32 can be reset under the drive of the return spring 33 after deflection, thereby converting the hydraulic reversing fan 3 from the blowing state to the suction state.

[0042] In addition, preferably, in the embodiment, the hydraulic continuously variable transmission device 1 of the rice machine can be connected to the oil tank through a pipeline. After the hydraulic oil in the oil tank is delivered to the hydraulic continuously variable transmission device 1, it is output to the back-blowing valve 2 and the hydraulic reversing fan 3 by the supplementary oil pump 10. Preferably, the pressure of the hydraulic oil output by the supplementary oil pump 10 can be 1.7 MPa to 2.5 MPa. Since the supplementary oil pump 10 in the hydraulic continuously variable transmission device 1 of the rice machine can output an overflow of 1.7 MPa to 2.5 MPa even when the hydraulic reversing fan 3 is not installed, the rice machine will not generate additional hydraulic loss even after the hydraulic reversing fan 3 is installed.

[0043] In addition, if Figures 1 to 4 As shown, according to a second aspect of the utility model, a rice harvester is provided, the rice harvester comprising the fan back-blowing system for the rice harvester as described above.

[0044] During use, after the rice harvester is started, the oil replenishment pump 10 of the hydraulic continuously variable transmission device 1 can stably output 1.7 MPa to 2.5 MPa of hydraulic oil. The hydraulic reversing fan 3 can change the wind direction under the pressure of the hydraulic oil. When the hydraulic reversing fan 3 stops, the oil replenishment pump 10 outputs hydraulic oil to the blowback valve 2. At this time, the oil inlet 21 and the oil outlet 22 of the blowback valve 2 are blocked, and the hydraulic reversing fan 3 does not operate. During the process of switching the hydraulic reversing fan 3 to the blowing state, the operator controls the blowback valve 2 to be energized through the button on the operating table, and the valve stem 20 is reversed. At this time, the oil inlet 21 of the blowback valve 2 is connected to the oil outlet 22, and the hydraulic oil flows through the blowback valve 2 to the fan oil inlet pipe 31 of the hydraulic reversing fan 3. The hydraulic oil drives the blade pressure plate 32 to deflect (the reset spring 33 is compressed), and the blade 301 follows the blade pressure plate 32 to deflect, and the blade 301 deflects from 30° to -25°. The hydraulic reversing fan 3 adjusts the angle of the blade 301 to achieve the conversion from the suction state to the blowing state under the premise that the rotation direction of the hydraulic reversing fan 3 remains unchanged. When the blowing state ends, the blowback valve 2 loses power, the valve stem 20 resets, the oil inlet 21 is no longer connected to the oil outlet 22, and the blade pressure plate 32 resets under the elastic force of the reset spring 33, thereby achieving the conversion from the blowing state to the suction state.

[0045] Finally, it should be noted that the above-described embodiments are only specific implementation methods of the present application, which are used to illustrate the technical solutions of the present application, rather than to limit them. The protection scope of the present application is not limited thereto. Although the present application is described in detail with reference to the above-described embodiments, ordinary technicians in the field should understand that any technician familiar with the technical field can still modify the technical solutions recorded in the above-described embodiments within the technical scope disclosed in the present application, or can easily think of changes, or make equivalent replacements for some of the technical features therein; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A fan back-blowing system for a rice machine, characterized in that: The fan back-blowing system for the rice machine comprises: A hydraulic continuously variable transmission device, the hydraulic continuously variable transmission device comprising an oil replenishment pump capable of continuously outputting hydraulic oil; a blowback valve connected to the oil replenishment pump through a pipeline; and The hydraulic reversing fan is connected to the back-blowing valve. When the hydraulic oil enters the hydraulic reversing fan, the wind direction of the hydraulic reversing fan changes.

2. The fan back-blowing system for a rice harvester according to claim 1, characterized in that: The back-blowing valve comprises: A valve stem, disposed inside the blowback valve, the valve stem being capable of moving along a first direction to a preset position and resetting from the preset position; An oil inlet, connected to the oil replenishment pump through a pipeline; an oil outlet, which is connected to the hydraulic reversing fan through a pipeline, and when the valve stem moves to the preset position, the oil inlet is connected to the oil outlet through the valve stem; and The oil return port is communicated with the oil tank. When the valve stem is reset, the oil inlet and the oil return port are communicated with each other through the valve stem.

3. The fan back-blowing system for a rice harvester according to claim 2, characterized in that: The valve stem is a two-position three-way reversing valve.

4. The fan back-blowing system for a rice harvester according to claim 2, characterized in that: An overflow valve is also arranged in the back-blowing valve, and the overflow valve is communicated with the oil tank.

5. The fan back-blowing system for a rice harvester according to claim 1, characterized in that: The hydraulic reversing fan comprises a fan oil inlet pipe and a fan body, wherein a first end of the fan oil inlet pipe is communicated with the back-blow valve, and a second end of the fan oil inlet pipe is communicated with the fan body.

6. The fan back-blowing system for a rice harvester according to claim 5, characterized in that: A blade pressure plate is arranged in the fan body, and when the hydraulic oil enters the fan body, the blade pressure plate is deflected.

7. The fan back-blowing system for a rice harvester according to claim 6, characterized in that: The hydraulic reversing fan includes a plurality of blades, and the plurality of blades are connected to the blade pressure plate. The blades can deflect following the blade pressure plate. The blades deflect from 30° to -25°, thereby changing the wind direction of the hydraulic reversing fan.

8. The fan back-blowing system for a rice harvester according to claim 6, characterized in that: A return spring is also provided in the fan body for driving the fan blade pressure plate to return to its original position.

9. The fan back-blowing system for a rice harvester according to claim 1, characterized in that: The pressure of the hydraulic oil output by the oil replenishment pump is 1.7 MPa to 2.5 MPa.

10. A rice machine, characterized in that: The rice machine comprises the fan back-blowing system for the rice machine according to any one of claims 1 to 9.

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