Tractor fan blowback hydraulic system and tractor

Abstract

The utility model provides a tractor fan blowback hydraulic system and a tractor. A tractor fan blowback hydraulic system comprises a hydraulic oil tank, a control oil source, a control valve bank and a fan blowback executing mechanism, the control oil source is connected with the control valve bank through a pipeline, and the control valve bank is connected with the hydraulic oil tank and the fan blowback executing mechanism through pipelines. And the control valve group is powered on, so that the fan blowback executing mechanism acts, fan blowback is achieved, the control valve group is powered off, and fan return is achieved. Straw and dust on the tractor hood and the heat dissipation water tank can be conveniently and reversely blown, the tractor hood and the heat dissipation water tank are prevented from being blocked by the straw and the dust, and the heat dissipation effect is prevented from being affected.

Description

Technical Field

[0001] The utility model relates to the technical field of tractor fans, in particular to a tractor fan back-blowing hydraulic system and a tractor. Background Art

[0002] At present, the fan blades of tractors have a fixed angle and a single wind direction. When the tractor is operating under conditions with a lot of straw and dust, the tractor hood and cooling water tank are easily blocked by straw and dust, affecting the heat dissipation effect. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a tractor fan back-blowing hydraulic system and a tractor in view of the deficiencies of the prior art.

[0004] The utility model solves the above-mentioned technical problem with the following technical solution: a tractor fan back-blowing hydraulic system, comprising: a hydraulic oil tank, a control oil source, a control valve group, and a fan back-blowing actuator. The control oil source is connected to the control valve group through a pipeline, and the control valve group is respectively connected to the hydraulic oil tank and the fan back-blowing actuator through pipelines.

[0005] The beneficial effects of the technical solution of the utility model are as follows: when the control valve group is powered, the fan back-blowing actuator is activated to realize the fan back-blowing, and when the control valve group is powered off, the fan is returned to its original position. It is convenient to back-blow the straw and dust on the tractor hood and the radiator water tank, and prevent the tractor hood and the radiator water tank from being blocked by straw and dust, thereby preventing the heat dissipation effect from being affected.

[0006] Furthermore, the control valve group includes: a two-position three-way reversing valve and a first safety valve, the two-position three-way reversing valve is respectively connected to the control oil source, the hydraulic oil tank, the first safety valve and the fan back-blow actuator through pipelines, and the first safety valve is connected to the control oil source and the hydraulic oil tank through pipelines.

[0007] The beneficial effect of adopting the above-mentioned further technical scheme is: when the two-position three-way reversing valve is energized, the control oil circuit passes through the right position of the two-position three-way reversing valve, and then through the A1 port of the control valve group, the fan back-blowing actuator is activated to achieve fan back-blowing; when the two-position three-way reversing valve is de-energized, the control oil circuit passes through the left position of the two-position three-way reversing valve, and then returns to the hydraulic oil tank through the T port of the control valve group to achieve fan return.

[0008] Furthermore, the control valve group includes: a two-position four-way reversing valve, a one-way valve and a second safety valve. The two-position four-way reversing valve is respectively connected to the control oil source, the hydraulic oil tank, the fan back-blow actuator and the one-way valve through pipelines. The one-way valve is connected to the hydraulic oil tank through a pipeline. The second safety valve is respectively connected to the control oil source, the one-way valve and the hydraulic oil tank through pipelines.

[0009] The beneficial effects of adopting the above further technical solution are: when the two-position four-way reversing valve is energized, the control oil circuit passes through the right position of the two-position four-way reversing valve, and then through the A1 port of the control valve group, the fan back-blowing actuator is activated to realize the fan back-blowing. When the two-position four-way reversing valve is de-energized, the control oil circuit passes through the left position of the two-position four-way reversing valve, and then returns to the hydraulic oil tank through the T port of the control valve group, and the fan returns. When the fan back-blowing actuator does not act, the two-position four-way reversing valve is de-energized, the two-position four-way reversing valve works in the left position, and the control oil source returns to the hydraulic oil tank through the one-way valve to realize unloading and achieve energy saving. In the unloading state, each component is not under pressure, which increases the service life of each component and increases reliability. When the fan back-blowing actuator needs to act, the two-position four-way reversing valve is energized, the two-position four-way reversing valve works in the right position, and the control oil source enters the fan back-blowing actuator through the two-position four-way reversing valve to realize the fan back-blowing. The setting of the one-way valve is used to realize the full flow output of the control valve group.

[0010] Furthermore, the control oil source is connected to the steering return oil through a pipeline.

[0011] The beneficial effect of adopting the above further technical solution is that the steering gear return oil is used as the control oil circuit of the control valve group, and the oil source is reasonably utilized.

[0012] Furthermore, the control valve group is connected to the radiator inlet through a pipeline, the radiator is connected in parallel with a bypass valve, the radiator outlet is connected to the oil inlet of the lubrication demand point or the hydraulic oil tank through a pipeline, the oil inlet of the lubrication demand point is connected to the inlet of a one-way valve that serves as back pressure and bypass through a pipeline, and the oil outlet of the lubrication demand point and the outlet of the one-way valve that serves as back pressure and bypass are connected to the hydraulic oil tank through a pipeline.

[0013] The beneficial effect of adopting the above further technical solution is that the radiator outlet is connected to the oil inlet of the lubrication demand point or the hydraulic oil tank according to demand, which is convenient for users to install according to actual needs.

[0014] Furthermore, the control valve group is connected in parallel with a first control oil source and a second control oil source.

[0015] The beneficial effect of adopting the above further technical solution is that the first control oil source, the second control oil source and the control valve group are connected in parallel to realize the action of other actuators of the tractor.

[0016] Furthermore, the fan back-blowing actuator is connected to a flip fan.

[0017] The beneficial effects of adopting the above further technical solution are: when the electromagnetic valve is energized, the fan blows back, and when the electromagnetic valve is de-energized, the fan returns to its original position. By controlling the angle of the fan blades, the fan blows back, thereby improving the reliability of the whole machine.

[0018] Furthermore, a filter is provided on the pipeline between the control oil source and the control valve group.

[0019] The beneficial effect of adopting the above further technical solution is: the setting of the filter is used to filter impurities in the pipeline, thereby improving the stability and reliability of the system.

[0020] In addition, the utility model also provides a tractor, comprising a tractor fan back-blowing hydraulic system as described in any one of the above.

[0021] The beneficial effects of the technical solution of the utility model are as follows: when the control valve group is powered, the fan back-blowing actuator is activated to realize the fan back-blowing, and when the control valve group is powered off, the fan is returned to its original position. It is convenient to back-blow the straw and dust on the tractor hood and the radiator water tank, and prevent the tractor hood and the radiator water tank from being blocked by straw and dust, thereby preventing the heat dissipation effect from being affected.

[0022] Advantages of additional aspects of the present invention will be partially given in the following description, and partially become apparent from the following description, or be understood through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is one of the structural schematic diagrams of the tractor fan back-blowing hydraulic system provided in an embodiment of the utility model.

[0024] Figure 2 The second structural schematic diagram of the tractor fan back-blowing hydraulic system provided in the embodiment of the utility model.

[0025] Figure 3 The third structural schematic diagram of the tractor fan back-blowing hydraulic system provided by the embodiment of the utility model.

[0026] Figure 4 The fourth structural schematic diagram of the tractor fan back-blowing hydraulic system provided in the embodiment of the utility model.

[0027] Explanation of the accompanying drawings: 1. Hydraulic oil tank; 2. Control oil source; 3. Filter; 4. Control valve group; 41. Two-position three-way reversing valve; 42. First safety valve; 43. One-way valve; 44. Two-position four-way reversing valve; 45. Second safety valve; 5. Fan back-blow actuator; 61. First control oil source; 62. Second control oil source; 7. Radiator; 8. Bypass valve; 9. Lubrication demand point; 10. One-way valve for back pressure and bypass. DETAILED DESCRIPTION

[0028] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The embodiments given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0029] like Figures 1 to 4 As shown, an embodiment of the utility model provides a tractor fan back-blowing hydraulic system, comprising: a hydraulic oil tank 1, a control oil source 2, a control valve group 4, and a fan back-blowing actuator 5, wherein the control oil source 2 is connected to the control valve group 4 through a pipeline, and the control valve group 4 is respectively connected to the hydraulic oil tank 1 and the fan back-blowing actuator 5 through pipelines.

[0030] The beneficial effects of the technical solution of the utility model are as follows: when the control valve group is powered, the fan back-blowing actuator is activated to realize the fan back-blowing, and when the control valve group is powered off, the fan is returned to its original position. It is convenient to back-blow the straw and dust on the tractor hood and the radiator water tank, and prevent the tractor hood and the radiator water tank from being blocked by straw and dust, thereby preventing the heat dissipation effect from being affected.

[0031] like Figures 1 to 4 As shown, further, the control valve group 4 includes: a two-position three-way reversing valve 41 and a first safety valve 42, the two-position three-way reversing valve 41 is connected to the control oil source 2, the hydraulic oil tank 1, the first safety valve 42 and the fan back-blow actuator 5 through pipelines, and the first safety valve 42 is connected to the control oil source 2 and the hydraulic oil tank 1 through pipelines.

[0032] The beneficial effect of adopting the above-mentioned further technical scheme is: when the two-position three-way reversing valve is energized, the control oil circuit passes through the right position of the two-position three-way reversing valve, and then through the A1 port of the control valve group, the fan back-blowing actuator is activated to achieve fan back-blowing; when the two-position three-way reversing valve is de-energized, the control oil circuit passes through the left position of the two-position three-way reversing valve, and then returns to the hydraulic oil tank through the T port of the control valve group to achieve fan return.

[0033] like Figures 1 to 4As shown, further, the control valve group 4 includes: a two-position four-way reversing valve 44, a one-way valve 43 and a second safety valve 45, the two-position four-way reversing valve 44 is connected to the control oil source 2, the hydraulic oil tank 1, the fan back-blowing actuator 5, and the one-way valve 43 through pipelines, the one-way valve 43 is connected to the hydraulic oil tank 1 through pipelines, and the second safety valve 45 is connected to the control oil source 2, the one-way valve 43 and the hydraulic oil tank 1 through pipelines.

[0034] The beneficial effects of adopting the above further technical solution are: when the two-position four-way reversing valve is energized, the control oil circuit passes through the right position of the two-position four-way reversing valve, and then through the A1 port of the control valve group, the fan back-blowing actuator is activated to realize the fan back-blowing. When the two-position four-way reversing valve is de-energized, the control oil circuit passes through the left position of the two-position four-way reversing valve, and then returns to the hydraulic oil tank through the T port of the control valve group, and the fan returns. When the fan back-blowing actuator does not act, the two-position four-way reversing valve is de-energized, the two-position four-way reversing valve works in the left position, and the control oil source returns to the hydraulic oil tank through the one-way valve to realize unloading and achieve energy saving. In the unloading state, each component is not under pressure, which increases the service life of each component and increases reliability. When the fan back-blowing actuator needs to act, the two-position four-way reversing valve is energized, the two-position four-way reversing valve works in the right position, and the control oil source enters the fan back-blowing actuator through the two-position four-way reversing valve to realize the fan back-blowing. The setting of the one-way valve is used to realize the full flow output of the control valve group.

[0035] like Figures 1 to 4 As shown, further, the control oil source 2 is connected with the steering return oil through a pipeline.

[0036] The beneficial effect of adopting the above further technical solution is that the steering gear return oil is used as the control oil circuit of the control valve group, and the oil source is reasonably utilized.

[0037] like Figures 1 to 4 As shown, further, the control valve group 4 is connected to the inlet of the radiator 7 through a pipeline, the radiator 7 is connected in parallel with a bypass valve 8, the outlet of the radiator 7 is connected to the oil inlet of the lubrication demand point 9 or the hydraulic oil tank 1 through a pipeline, the oil inlet of the lubrication demand point 9 is connected to the inlet of a one-way valve 10 that plays a back pressure and bypass role through a pipeline, and the oil outlet of the lubrication demand point 9 and the outlet of the one-way valve 10 that plays a back pressure and bypass role are connected to the hydraulic oil tank 1 through a pipeline.

[0038] The beneficial effect of adopting the above further technical solution is that the radiator outlet is connected to the oil inlet of the lubrication demand point or the hydraulic oil tank according to demand, which is convenient for users to install according to actual needs.

[0039] like Figures 1 to 4 As shown, further, the control valve group 4 is connected in parallel with a first control oil source 61 and a second control oil source 62 .

[0040] The beneficial effect of adopting the above further technical solution is that the first control oil source, the second control oil source and the control valve group are connected in parallel to realize the action of other actuators of the tractor.

[0041] like Figures 1 to 4 As shown, the first control oil source 61 can be a power shift control oil source, and the second control oil source 62 can be a wet PTO control oil source. The user can set the quantity and type of the first control oil source and the second control oil source according to actual needs.

[0042] The beneficial effect of adopting the above further technical solution is that the first control oil source, the second control oil source and the control valve group are connected in parallel to realize the action of other actuators of the tractor.

[0043] like Figures 1 to 4 As shown, further, the fan blowback actuator 5 is connected to a flip fan.

[0044] The beneficial effects of adopting the above further technical solution are: when the electromagnetic valve is energized, the fan blows back, and when the electromagnetic valve is de-energized, the fan returns to its original position. By controlling the angle of the fan blades, the fan blows back, thereby improving the reliability of the whole machine.

[0045] like Figures 1 to 4 As shown, further, a filter 3 is provided on the pipeline between the control oil source 1 and the control valve group 4.

[0046] The beneficial effect of adopting the above further technical solution is: the setting of the filter is used to filter impurities in the pipeline, thereby improving the stability and reliability of the system.

[0047] Option 1:

[0048] like Figure 1 As shown, a tractor fan back-blowing hydraulic system provided by an embodiment of the utility model can be a hydraulic system for realizing tractor fan back-blowing, comprising: a hydraulic oil tank 1, a control oil source 2, a filter 3, a control valve group 4, and a fan back-blowing actuator 5. The control valve group 4 includes a two-position three-way reversing valve 41 and a first safety valve 42.

[0049] The control oil source 2 comes from the steering return oil, such as Figure 4As shown, generally, the CO port of the control valve group 4 is connected to the radiator inlet, a bypass valve is arranged between the radiator inlet and the outlet, the radiator outlet is connected to the oil inlet of the lubrication demand point or the hydraulic oil tank 1 according to demand, the oil inlet of the lubrication demand point is connected in parallel with the inlet of the one-way valve having back pressure and bypass function (the one-way valve having back pressure and bypass function), and the oil outlet of the lubrication demand point and the outlet of the one-way valve having back pressure and bypass function are connected to the hydraulic oil tank 1. The control oil source 2 is connected to the inlet of the filter 3, the outlet of the filter 3 is connected to the inlet of the control valve group 4, the A1 port of the control valve group 4 is connected to the fan back-blowing actuator 5, the two-position three-way reversing valve 41 is energized, the control oil circuit passes through the two-position three-way reversing valve 41 to the right position, and then through the A1 port of the control valve group 4, so that the fan back-blowing actuator 5 is actuated to achieve fan back-blowing, the two-position three-way reversing valve 41 loses power, the control oil circuit passes through the two-position three-way reversing valve 41 to the left position, and then returns to the hydraulic oil tank 1 through the T port of the control valve group 4 to achieve fan return.

[0050] Option 2:

[0051] like Figure 2 As shown, compared with the first solution, a first control oil source 61 and a second control oil source 62 are added.

[0052] The first control oil source 61 and the second control oil source 62 are connected in parallel with the control valve group 4 to realize the actions of other actuators of the tractor, such as the power shift control oil source, the wet PTO control oil source, etc. The number of control oil sources is not limited.

[0053] Option 3:

[0054] like Figure 3 As shown, the control valve group 4 is changed compared with the first scheme, the two-position three-way reversing valve 41 is replaced by a two-position four-way reversing valve 44, and a one-way valve 43 is added.

[0055] The utility model provides a tractor fan back-blowing hydraulic system, which can be a hydraulic system for realizing tractor fan back-blowing, including: a hydraulic oil tank 1, a control oil source 2, a filter 3, a control valve group 4, and a fan back-blowing actuator 5. The control valve group 4 includes a two-position four-way reversing valve 44, a second safety valve 45 and a check valve 43. The control oil source 2 comes from the steering return oil, such as Figure 4As shown, generally, the CO port of the control valve group 4 is connected to the inlet of the radiator 7, a bypass valve 8 is provided between the inlet and the outlet of the radiator 7, the outlet of the radiator 7 is connected to the oil inlet of the lubrication demand point 9 or the hydraulic oil tank 1 according to demand, the oil inlet of the lubrication demand point 9 is connected in parallel with the inlet of the one-way valve (the one-way valve 10 having the back pressure and bypass functions) having the back pressure and bypass functions, and the oil outlet of the lubrication demand point 9 and the outlet of the one-way valve having the back pressure and bypass functions are connected to the hydraulic oil tank 1. The control oil source 2 is connected to the inlet of the filter 3, the outlet of the filter 3 is connected to the inlet of the control valve group 4, the A1 port of the control valve group 4 is connected to the fan back-blowing actuator 5, the two-position four-way reversing valve 44 is energized, the control oil circuit passes through the right position of the two-position four-way reversing valve 44, and then through the A1 port of the control valve group 4, so that the fan back-blowing actuator 5 is actuated to realize fan back-blowing, the two-position four-way reversing valve 44 loses power, the control oil circuit passes through the left position of the two-position four-way reversing valve 44, and then returns to the hydraulic oil tank 1 through the T port of the control valve group 4, and the fan returns to its position.

[0056] When the fan back-blowing actuator 5 does not act, the two-position four-way reversing valve 44 loses power, the two-position four-way reversing valve 44 works in the left position, and the control oil source 2 returns to the hydraulic oil tank 1 through the one-way valve 43 to achieve unloading and energy saving. In the unloading state, each component is not compressed, which increases the service life of each component and increases reliability. When the fan back-blowing actuator 5 needs to act, the two-position four-way reversing valve 44 is energized, the two-position four-way reversing valve 44 works in the right position, and the control oil source 2 enters the fan back-blowing actuator 5 through the two-position four-way reversing valve 44 to achieve fan back-blowing.

[0057] The function of the one-way valve 43 is that if there is no one-way valve 43, when the fan back-blowing actuator 5 needs to act, the two-position four-way reversing valve 44 is energized, and the two-position four-way reversing valve 44 works in the right position. At this time, the oil at the CO port of the control valve group 4 will return to the hydraulic oil tank 1 through the right position of the two-position four-way reversing valve 44 and the T port of the control valve group 4, thereby affecting the full flow output of the CO port of the control valve group 4.

[0058] In addition, the utility model also provides a tractor, comprising a tractor fan back-blowing hydraulic system as described in any one of the above.

[0059] The beneficial effects of the technical solution of the utility model are as follows: when the control valve group is powered, the fan back-blowing actuator is activated to realize the fan back-blowing, and when the control valve group is powered off, the fan is returned to its original position. It is convenient to back-blow the straw and dust on the tractor hood and the radiator water tank, and prevent the tractor hood and the radiator water tank from being blocked by straw and dust, thereby preventing the heat dissipation effect from being affected.

[0060] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A tractor fan back-blowing hydraulic system, characterized in that: include: A hydraulic oil tank, a control oil source, a control valve group, and a fan blowback actuator. The control oil source is connected to the control valve group through a pipeline, and the control valve group is respectively connected to the hydraulic oil tank and the fan blowback actuator through pipelines; the control oil source is connected to the steering return oil through a pipeline.

2. A tractor fan back-blowing hydraulic system according to claim 1, characterized in that: The control valve group includes: a two-position three-way reversing valve and a first safety valve. The two-position three-way reversing valve is connected to the control oil source, the hydraulic oil tank, the first safety valve and the fan back-blow actuator through pipelines respectively. The first safety valve is connected to the control oil source and the hydraulic oil tank through pipelines.

3. A tractor fan back-blowing hydraulic system according to claim 1, characterized in that: The control valve group includes: a two-position four-way reversing valve, a one-way valve and a second safety valve. The two-position four-way reversing valve is connected to the control oil source, the hydraulic oil tank, the fan back-blowing actuator and the one-way valve through pipelines, respectively. The one-way valve is connected to the hydraulic oil tank through a pipeline, and the second safety valve is connected to the control oil source, the one-way valve and the hydraulic oil tank through pipelines, respectively.

4. A tractor fan back-blowing hydraulic system according to claim 1, characterized in that: The control valve group is connected to the radiator inlet through a pipeline, the radiator is connected in parallel with a bypass valve, the radiator outlet is connected to the lubrication demand point oil inlet or the hydraulic oil tank through a pipeline, the lubrication demand point oil inlet is connected to the inlet of a one-way valve that serves as back pressure and bypass through a pipeline, and the lubrication demand point oil outlet and the one-way valve outlet that serves as back pressure and bypass are connected to the hydraulic oil tank through a pipeline.

5. A tractor fan back-blowing hydraulic system according to claim 1, characterized in that: The control valve group is connected in parallel with a first control oil source and a second control oil source.

6. A tractor fan back-blowing hydraulic system according to claim 1, characterized in that: The fan back-blowing actuator is connected to a flip fan.

7. A tractor fan back-blowing hydraulic system according to claim 1, characterized in that: A filter is provided on the pipeline between the control oil source and the control valve group.

8. A tractor, characterized in that: A tractor fan back-blow hydraulic system comprising any one of claims 1 to 7.

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