Machine tool fan driving hydraulic system

Abstract

The utility model provides a machine tool fan driving hydraulic system which comprises a gearbox, an oil tank, an oil pump, a flow valve, a fan motor and a radiator, an input shaft of the oil pump is connected with an output shaft of the gearbox, an oil inlet pipeline and an oil return pipeline are arranged on the oil tank, an inlet of the oil pump is connected with the oil inlet pipeline, and an outlet of the oil pump is connected with the flow valve. An outlet of the flow valve is connected with a fan motor, an outlet of the fan motor is connected with a radiator, and an outlet of the radiator is connected with an oil return pipeline; an output shaft of the fan motor is used for being connected with the machine tool fan. According to the utility model, oil is sucked from the oil tank through the oil pump, and the fan motor is driven to rotate at a constant speed after the flow is adjusted by the flow valve, so that the constant-speed driving of the machine fan is realized; power of the rear output shaft of the tractor is received through the gearbox, the power of the tractor is conveniently and fully utilized to drive the machine tool fan, the structure is simple, a transmission chain is short, a mobile power supply facility is omitted, and application and popularization of the fan in the field of seeders are facilitated.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of machine tool fan drive configured with tractor, and particularly relates to a machine tool fan drive hydraulic system. BACKGROUND

[0002] With the vigorous development of tractors in the international market, the application field thereof is gradually expanded, and the machine tool functions configured therewith are gradually enriched. Some tractors are configured with machine tools having fans for assisting operation, such as seed distribution fans in seeders. The driving form of the fan is different from the driving forms of common oil cylinders and traveling motors, and the speed of the fan needs to be controlled at a constant speed during operation to ensure constant air pressure. Therefore, the fan drive cannot be shared with the first two driving forms, and currently, a motor is generally used to drive the fan, which requires high mobile power supply facilities and complicated driving devices, thereby limiting the promotion of the fan in the seeder field. SUMMARY

[0003] The utility model solves the technical problems of how to fully utilize the power of a tractor to achieve constant speed driving of a machine tool fan.

[0004] The utility model solves the technical problems above by the technical scheme as follows:

[0005] The utility model provides a machine tool fan drive hydraulic system, including gearbox, oil tank, oil pump, flow valve, fan motor, radiator, the input shaft of oil pump is connected with the output shaft of gearbox, is equipped with oil inlet pipeline and oil return pipeline on the oil tank, and the inlet of oil pump is connected with oil inlet pipeline, and the outlet of oil pump is connected with flow valve, and the outlet of flow valve is connected with fan motor, and the outlet of fan motor is connected with radiator, and the outlet of radiator is connected with oil return pipeline, and the output shaft of fan motor is used for connecting machine tool fan.

[0006] The utility model has the advantages of:

[0007] The utility model is adopted, through oil pump from oil tank oil, flow valve adjusts the flow and then drives fan motor constant speed rotation, realizes the constant speed driving of machine tool fan, through the gearbox and accepts the power of the rear output shaft of tractor, is convenient for fully utilizing the power of tractor and driving machine tool fan, simple structure, short transmission chain, removes the mobile power supply facility, reduces the cost, is favorable for the promotion and use of fan in the seeder field.

[0008] On the basis of the above technical scheme, the utility model can also be improved as follows.

[0009] Further, the flow valve comprises a throttle hole and a normally closed valve, the inlet of the throttle hole and the inlet of the normally closed valve are connected with the oil pump respectively, the outlet of the throttle hole is connected with the fan motor, and the outlet of the normally closed valve is connected with the oil return pipeline; one end of the valve core of the normally closed valve is connected on the inlet pipeline of the throttle hole, and the other end of the valve core of the normally closed valve is connected on the outlet pipeline of the throttle hole.

[0010] When the oil flows through the throttle hole, under the pressure drop of the throttle hole, the pressure difference opposite to the reset spring force direction is generated at both ends of the valve core of the normally closed valve, and the pressure difference is proportional to the flow of the throttle hole; when the flow of the throttle hole is too large, the pressure difference pushes the valve core of the normally closed valve to move to the opening, so that part of the oil flows to the oil return pipeline through the normally closed valve, thereby ensuring the constant flow from the throttle hole to the fan motor and ensuring the constant rotation of the fan motor.

[0011] Further, the safety valve is further connected with the fan motor in parallel.

[0012] During the rotation of the fan motor, if the pressure fluctuation caused by the sudden load is encountered, when the pressure exceeds the opening pressure of the safety valve, part of the oil flows to the radiator through the safety valve, thereby limiting the continuous increase of the oil pressure of the fan motor, and facilitating the protection of the hydraulic system.

[0013] Further, the safety valve is further connected with the fan motor in parallel.

[0014] When the machine is stopped, the oil pump stops supplying oil, and the fan motor continues to rotate under the action of the moment of inertia, part of the oil at the outlet of the fan motor flows back to the inlet of the fan motor through the first one-way valve, thereby maintaining the complete stop of the fan motor, facilitating the prevention of the excessive impact and negative pressure caused by the rotation of the fan motor, and prolonging the service life of the hydraulic system.

[0015] Further, the inlet of the fan motor is further connected with a pressure gauge.

[0016] The working pressure of the inlet of the fan motor can be observed in real time, and the controllability is good.

[0017] Further, the radiator is further connected with a second one-way valve in parallel.

[0018] When the flow increases or the radiator fails, the oil return of the fan motor and the safety valve flows back to the oil return pipeline through the second one-way valve, thereby avoiding the blockage of the hydraulic system and improving the safety.

[0019] Further, an oil suction filter is further arranged on the oil inlet pipeline.

[0020] The oil suction filter can filter the oil from the oil tank to the oil pump, thereby ensuring the cleanliness of the oil in the hydraulic system.

[0021] Further, the oil suction filter is further connected with a third one-way valve in parallel.

[0022] When the flow is large or the oil suction filter is faulty, the oil flows from the third one-way valve to the oil pump, avoiding damage caused by excessive negative pressure of the oil pump.

[0023] Further, the oil return pipeline is further provided with an oil return filter.

[0024] The oil liquid is filtered, avoiding impurities generated in the working process of the oil liquid fan motor, pump, valve and pipeline to enter the oil tank, ensuring the oil liquid cleanliness and prolonging the service life of the oil liquid.

[0025] Further, the oil return filter is further connected in parallel with a fourth one-way valve.

[0026] When the flow is large or the oil return filter is faulty, the oil flows from the fourth one-way valve to the oil tank, limiting the pressure of the oil return pipeline from continuing to rise, and improving the safety. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 It is a structure schematic view of the working state of the utility model.

[0028] Figure 2 It is a structure schematic view of the overload protection state of the utility model.

[0029] Figure 3 It is a structure schematic view of the oil replenishment state of the utility model when the machine stops.

[0030] In the drawings, the technical features represented by the reference signs are as follows:

[0031] 1 - rear output shaft; 2 - gearbox; 3 - oil tank; 4 - oil pump; 5 - flow valve; 51 - throttle hole; 52 - normally closed valve; 6 - fan motor; 7 - radiator; 8 - safety valve; 9 - first one-way valve; 10 - pressure gauge; 11 - second one-way valve; 12 - oil suction filter; 13 - third one-way valve; 14 - oil return filter; 15 - fourth one-way valve. DETAILED DESCRIPTION

[0032] The principles and characteristics of the utility model are described below in combination with the drawings, and the examples are only used to explain the utility model and are not used to limit the scope of the utility model.

[0033] The utility model refers to Figures 1-3 .

[0034] The utility model provides a kind of machine fan drive hydraulic system, including gearbox 2, oil tank 3, oil pump 4, flow valve 5, fan motor 6, radiator 7, the input shaft of oil pump 4 connects the output shaft of gearbox 2, oil tank 3 is equipped with oil inlet pipeline and oil return pipeline, the inlet of oil pump 4 connects oil inlet pipeline, the outlet of oil pump 4 connects flow valve 5, the outlet of flow valve 5 connects fan motor 6, the outlet of fan motor 6 connects radiator 7, the outlet of radiator 7 connects oil return pipeline;The output shaft of fan motor 6 is used to connect the machine fan.

[0035] Principle:

[0036] When installing, the input shaft of gearbox 2 is connected to the rear output shaft 1 of tractor;The rear output shaft 1 is the original component on tractor, which belongs to prior art.The output shaft of fan motor 6 is connected to machine fan. Figure 1 As shown in the figure: the rear output shaft 1 of tractor drives gearbox 2, and gearbox 2 drives oil pump 4 after adjusting speed;Oil pump 4 sucks oil from oil tank 3 and inputs to flow valve 5, and then constant-flow oil enters fan motor 6 after flow control by flow valve 5, so as to drive fan motor 6 to rotate at constant speed;The oil return of fan motor 6 is radiated by radiator 7, and then returns to oil tank 3 through oil return pipeline.

[0037] By using the utility model, oil pump 4 sucks oil from oil tank 3, and fan motor 6 rotates at constant speed after flow control by flow valve 5, so as to realize constant-speed drive of machine fan;The power of rear output shaft 1 of tractor is received by gearbox 2, so as to fully utilize the power of tractor to drive machine fan, which has simple structure, short transmission chain, saves mobile power supply facility, reduces cost and is conducive to popularization and application of fan in seeding machine field.

[0038] Further, the flow valve 5 includes a throttle hole 51 and a normally closed valve 52, the inlet of the throttle hole 51 and the inlet of the normally closed valve 52 are connected to the oil pump 4 respectively, the outlet of the throttle hole 51 is connected to the fan motor 6, and the outlet of the normally closed valve 52 is connected to the oil return pipeline;One end of the valve core of the normally closed valve 52 is connected to the inlet pipeline of the throttle hole 51, and the other end of the valve core of the normally closed valve 52 is connected to the outlet pipeline of the throttle hole 51.

[0039] When oil flows through the throttle hole 51, a pressure difference opposite to the reset spring force of the valve core of the normally closed valve 52 is generated at both ends of the valve core under the pressure drop of the throttle hole 51, and the pressure difference is proportional to the flow of the throttle hole 51;When the flow of the throttle hole 51 is too large, the pressure difference pushes the valve core of the normally closed valve 52 to move to open, so that part of the oil flows to the oil return pipeline through the normally closed valve 52, which ensures the constant flow from the throttle hole 51 to the fan motor 6 and ensures the constant rotation of the fan motor 6.

[0040] Further, it further includes a safety valve 8, and the safety valve 8 is connected in parallel with the fan motor 6.

[0041] like Figure 2 As shown: During the rotation of the fan motor 6, if a sudden load occurs causing pressure fluctuations, when the pressure exceeds the opening pressure of the safety valve 8, part of the oil flows through the safety valve 8 to the radiator 7, limiting the further increase in the oil pressure of the fan motor 6, thereby protecting the hydraulic system.

[0042] Furthermore, the safety valve 8 is also connected in parallel with a first one-way valve 9 .

[0043] like Figure 3 As shown in the figure: when the machine is shut down, the oil pump 4 stops supplying oil, while the fan motor 6 continues to rotate under the action of the inertia moment. Part of the oil at the outlet of the fan motor 6 flows back to the inlet of the fan motor 6 through the first one-way valve 9 and is maintained until the fan motor 6 completely stops. This is convenient for preventing excessive impact and negative pressure caused by the rotation of the fan motor 6, thereby extending the service life of the hydraulic system.

[0044] Furthermore, a pressure gauge 10 is connected to the inlet of the blower motor 6 .

[0045] It is convenient to observe the working pressure at the inlet of the fan motor 6 in real time, and the controllability is good.

[0046] Furthermore, the radiator 7 is also connected in parallel with a second one-way valve 11 .

[0047] When the flow rate increases or the radiator 7 fails, the return oil of the fan motor 6 and the safety valve 8 flows back to the return oil pipeline through the second one-way valve 11, avoiding blockage of the hydraulic system and improving safety.

[0048] Furthermore, an oil suction filter 12 is provided on the oil inlet pipeline.

[0049] It is convenient to filter the oil from the oil tank 3 to the oil pump 4, ensuring the cleanliness of the oil in the hydraulic system.

[0050] Furthermore, the oil suction filter 12 is also connected in parallel with a third one-way valve 13 .

[0051] When the flow rate is large or the oil suction filter 12 fails, the oil flows from the third one-way valve 13 to the oil pump 4, thereby preventing the oil pump 4 from being damaged by excessive negative pressure.

[0052] Furthermore, an oil return filter 14 is provided on the oil return pipeline.

[0053] It is convenient to filter the oil and prevent impurities generated during the operation of hydraulic components such as the oil blower motor 6, pumps, valves, and pipelines from entering the oil tank 3, thereby ensuring the cleanliness of the oil and extending the service life of the oil.

[0054] Furthermore, the oil return filter 14 is also connected in parallel with a fourth one-way valve 15 .

[0055] When the flow is large or the oil return filter 14 fails, the oil returns to the oil tank 3 from the fourth one-way valve 15, the pressure of the oil return pipeline is limited to continue to rise, and the safety is improved.

[0056] In the description of the utility model, it is understood that if the description of the direction, direction or position relationship appears, for example: "center", "vertical", "horizontal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like, the direction or position relationship indicated in the specification is based on the direction or position relationship shown in the drawing, and is only for the convenience of understanding the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated part, element or whole must have a particular orientation, structure and operation, and therefore cannot be understood as a limitation on the utility model.

[0057] In addition, if the order description language appears, for example: "first", "second" and the like, the use in the specification is for the convenience of understanding or simplifying the description, for example, in order to distinguish a plurality of technical features of the same type or function, and it is necessary to mention separately, and the specification may adopt the way of prefix or suffix order description language to distinguish them. Therefore, it cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features limited by "first", "second" can be explicitly or implicitly included at least one feature. In the description of the utility model, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise specifically limited.

[0058] In the utility model, if the structure relative action relationship description language is adopted, for example: "installation", "connection", "connection", "fixing" and the like, unless otherwise specified and limited, it should be understood in a broad sense. For example, "installation", "connection", "connection" and the like can be fixed connection, or detachable connection, or integrated; can be mechanical connection, or electrical connection; can be directly connected, or indirectly connected through intermediate medium; can be the communication or interaction relationship between two elements; "fixed" can be integrated fixed, or detachable fixed through fastener; can be direct fixing, or fixing through intermediate medium. For ordinary skilled in the art, the specific meaning of the above description language in the utility model can be understood according to the specific situation, the context, the text meaning coherence and the like.

[0059] In the utility model, if the description language containing the accessory or the connection meaning appears, for example, the first feature is on or under the second feature, unless another explicit provision and limitation, should not be limited understanding, for example, "on" or "under" can be the first and second features directly contact, also can be the first feature and the second feature indirectly contact through the intermediate medium. For the ordinary skilled person in the art, can understand the specific meaning of the above description language in the utility model according to specific circumstances, the context, the text meaning coherence of the preceding and following text etc.

[0060] Further, the first feature is on, above and on the second feature can be the first feature is directly above or obliquely above the second feature, or just indicates that the first feature is higher than the second feature in horizontal height. The first feature is below, under and under the second feature can be the first feature is directly below or obliquely below the second feature, or just indicates that the first feature is less than the second feature in horizontal height.

[0061] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In the specification, the illustrative description of the above terms is not necessarily for the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, the skilled in the art can combine and combine the different embodiments, examples and features of different embodiments, examples described in the specification without contradiction, which should be included in the scope of the utility model.

[0062] Although the embodiments of the utility model have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the utility model, within the scope of information available to the public, the skilled in the art can make changes, modifications, replacements and modifications to the above embodiments, still can be covered in the protection scope of the application.

Claims

1. A hydraulic system for driving a blower fan of an implement, characterized by: The invention comprises a gearbox (2), an oil tank (3), an oil pump (4), a flow valve (5), a fan motor (6), and a radiator (7). The input shaft of the oil pump (4) is connected to the output shaft of the gearbox (2). The oil tank (3) is provided with an oil inlet pipeline and an oil return pipeline. The inlet of the oil pump (4) is connected to the oil inlet pipeline. The outlet of the oil pump (4) is connected to the flow valve (5). The outlet of the flow valve (5) is connected to the fan motor (6). The outlet of the fan motor (6) is connected to the radiator (7). The outlet of the radiator (7) is connected to the oil return pipeline. The output shaft of the fan motor (6) is used to connect to the machine fan.

2. The hydraulic system for driving a blower of an implement according to claim 1, characterized in that: The flow valve (5) comprises a throttle hole (51) and a normally closed valve (52); the inlet of the throttle hole (51) and the inlet of the normally closed valve (52) are respectively connected to the oil pump (4); the outlet of the throttle hole (51) is connected to the fan motor (6); and the outlet of the normally closed valve (52) is connected to the oil return pipeline; one end of the valve core of the normally closed valve (52) is connected to the inlet pipeline of the throttle hole (51), and the other end of the valve core of the normally closed valve (52) is connected to the outlet pipeline of the throttle hole (51).

3. The hydraulic system for driving a blower for an implement according to claim 1, characterized in that: The utility model also comprises a safety valve (8), which is connected in parallel with the blower motor (6).

4. The hydraulic system for driving a blower of a machine tool according to claim 3, characterized in that: The safety valve (8) is also connected in parallel with a first one-way valve (9).

5. The hydraulic system for driving a blower fan for an implement according to claim 4, characterized in that: The inlet of the blower motor (6) is also connected to a pressure gauge (10).

6. The hydraulic system for driving a blower of an implement according to claim 1, characterized in that: The radiator (7) is also connected in parallel with a second one-way valve (11).

7. The hydraulic system for driving a blower of an implement according to claim 1, characterized in that: An oil suction filter (12) is also provided on the oil inlet pipeline.

8. The hydraulic system for driving a blower of an implement according to claim 7, characterized in that: The oil suction filter (12) is also connected in parallel with a third one-way valve (13).

9. The hydraulic system for driving a blower for an implement according to claim 1, characterized in that: The oil return pipeline is also provided with an oil return filter (14).

10. The implement blower driving hydraulic system according to claim 9, characterized in that: The oil return filter (14) is also connected in parallel with a fourth one-way valve (15).

Images