阅读说明：本技术 一种热气流可控式的联合收割机清选装置 (Combine cleaning plant of controllable formula of hot gas flow ) 是由 唐忠 李禧尧 任辉 刘鑫 张彪 于 2019-08-02 设计创作，主要内容包括：本发明提供了一种热气流可控式的联合收割机清选装置,所述清选装置包括离心风机,所述离心风机的出风口处安装加热装置,用于在清选过程中干燥脱粒物。所述加热装置为电热丝,若干电热丝周向均布安装在所述离心风机的出风口。所述发电装置包括磁极对、线圈、电刷和换向器,所述磁极对安装在离心风机的机壳内部,用于机壳内部产生磁场；所述离心风机叶轮的叶片上缠绕线圈绕组,所述离心风机传动轴的一端安装两个互相不接触的换向器,所述线圈绕组两端分别与两个所述换向器连接；两个所述电刷分别与两个所述换向器接触,两个所述电刷与加热装置形成闭合电路。本发明可以实现热风清选,降低潮湿作物含水率,提高收获效率,降低损失率和含杂率。(The invention provides a cleaning device of a combine harvester with controllable hot air flow, which comprises a centrifugal fan, wherein a heating device is arranged at an air outlet of the centrifugal fan and used for drying threshed objects in the cleaning process. The heating device is an electric heating wire, and a plurality of electric heating wires are circumferentially and uniformly distributed at an air outlet of the centrifugal fan. The power generation device comprises a magnetic pole pair, a coil, an electric brush and a commutator, wherein the magnetic pole pair is arranged inside a shell of the centrifugal fan and used for generating a magnetic field inside the shell; a coil winding is wound on a blade of the centrifugal fan impeller, one end of a transmission shaft of the centrifugal fan is provided with two commutators which are not in contact with each other, and two ends of the coil winding are respectively connected with the two commutators; the two electric brushes are respectively contacted with the two commutators, and the two electric brushes and the heating device form a closed circuit. The invention can realize hot air cleaning, reduce the moisture content of wet crops, improve the harvesting efficiency and reduce the loss rate and impurity rate.)

1. The utility model provides a combine cleaning plant of controllable formula of hot gas flow, cleaning plant includes centrifugal fan, its characterized in that, heating device is installed to centrifugal fan's air outlet department for dry threshing object in cleaning process.

2. A cleaning device of a combine harvester with controllable hot air flow according to claim 1, characterized in that the heating device is an electric heating wire (2), and a plurality of electric heating wires (2) are circumferentially and uniformly arranged at the air outlet of the centrifugal fan.

3. A combine cleaning plant controllable by hot airflow according to claim 1, further comprising a power generating device comprising a pair of magnetic poles, a coil winding (304), an electric brush and a commutator, the pair of magnetic poles being mounted inside the casing (1) of the centrifugal fan for generating a magnetic field inside the casing (1); a coil winding (304) is wound on a blade of the centrifugal fan impeller (3), two commutators which are not in contact with each other are installed at one end of a transmission shaft (301) of the centrifugal fan, and two ends of the coil winding (304) are respectively connected with the two commutators; the two brushes are respectively contacted with the two commutators, and the two brushes (105) and a heating device form a closed circuit.

4. A combine harvester cleaning plant controlled by a hot air flow according to claim 3, characterized in that the impeller (3) comprises a fan blade (302) and a drive shaft (301), the drive shaft (301) is provided with a plurality of blades (302), the surface of the blade (302) is provided with coil windings (304), and the coil windings (304) on adjacent blades (302) are connected in series.

5. A cleaning plant for a combine harvester with controllable hot air flow according to claim 4, characterized in that the blades (302) are straight forward blades, 4 blades (302) being uniformly distributed on a transmission shaft (301).

6. A cleaning plant for a combine harvester with controllable hot air flow according to claim 1, characterized in that the air outlet of the casing (1) is radially provided with an openable shutter (105).

7. A cleaning plant for a combine harvester with controllable hot air flow according to claim 6, characterized in that the shutter (105) is connected with an actuator for controlling the opening and closing of the air outlet.

Technical Field

The invention relates to the technical field of air screen type cleaning devices of combine harvesters, in particular to a cleaning device of a combine harvester with controllable hot air flow.

Background

The air-screen type cleaning device is an important component of the combine harvester, the working performance of the air-screen type cleaning device directly influences the cleaning quality of the whole combine harvester, and the air-screen type cleaning device has practical significance for improving the mechanical harvesting efficiency and reducing the loss rate and impurity rate. The fan is the main component of the air-screen type cleaning device and plays an important role in cleaning quality. Compared with other fans, the centrifugal fan has the advantages of simple structure, convenient configuration and large control area, and can realize good cleaning effect of the cleaning sieve.

At present, the air screen type cleaning device and the method of the combine harvester mainly comprise the following steps: stephen L, etc. invent a novel cleaning device, which can adjust the rotating speed of a centrifugal fan through a controller and adjust the size of an air inlet, thereby improving the cleaning performance. Li Yanming, etc. invented an electrically-controlled cleaning fan, which can control the air intake of air inlet, regulate the angle of air-distributing plate of air outlet and regulate the rotating speed of fan so as to implement real-time regulation of working parameters of cleaning fan. The Chinese patent discloses that the double-fan is arranged on the front side of the vibrating screen of the harvester, so that the harvester is simple in structure, low in cost and small in occupied space. When cleaning grains, the wind from the auxiliary fan blows to the corrugated plate, the wind speed at the front part of the corrugated plate is large, the wind flow is large, and the cleaning effect is good. Meanwhile, the air from the main fan blows to the upper sieve and the lower sieve, so that effective separation of grains can be ensured, grain loss is low, and cleaning efficiency is high. Chinese patent discloses a high-efficiency cleaning device with a turbine and multiple air ducts, which mainly comprises a material conveying and uniformly distributing device, a grain and impurity conveying device, a cleaning device and a transmission device; the high-efficiency cleaning requirement of crops with large feeding amount is met; the turbine multi-air-channel fan has the advantages of large flow, uniform air speed at an air outlet, stable air flow, strong anti-attenuation capability, compact structure and high energy efficiency ratio; can meet the high-efficiency and high-performance cleaning operation of wheat, rice, rape, corn, soybean and other crops with the feeding amount of 5-8kg/s, and has the advantages of small cleaning loss, low impurity rate, high operation efficiency and compact structure.

The invention realizes the optimization of the air screen type cleaning device of the combine harvester, but the cleaned materials have great influence on the cleaning quality, and the cleaned materials have high moisture content and are relatively moist, thereby reducing the mechanical harvesting efficiency and improving the loss rate and impurity rate.

Disclosure of Invention

Aiming at the problems that the existing air screen type cleaning device of the combine harvester has high moisture content and is relatively moist and has important influence on the cleaning quality because the cleaned materials are ignored, the mechanized harvesting efficiency is reduced, and the loss rate and impurity rate are improved; the invention provides a cleaning device of a combine harvester with controllable hot air flow, which is characterized in that an air outlet is provided with an electric heating wire, so that air discharged by a centrifugal fan is heated by the electric heating wire at the air outlet and is changed into hot air to be sent out, thereby realizing hot air cleaning, reducing the moisture content of wet crops, improving the harvesting efficiency and reducing the loss rate and impurity rate.

The present invention achieves the above-described object by the following technical means.

The utility model provides a combine cleaning plant of controllable formula of hot gas flow, cleaning plant includes centrifugal fan, centrifugal fan's air outlet department installation heating device for dry the threshing object at cleaning process.

Further, the heating device is an electric heating wire, and a plurality of electric heating wires are circumferentially and uniformly distributed at an air outlet of the centrifugal fan.

The centrifugal fan comprises a centrifugal fan body, a power generation device and a control device, wherein the centrifugal fan body is provided with a centrifugal fan motor, and the power generation device comprises a magnetic pole pair, a coil, an electric brush and a commutator; a coil winding is wound on a blade of the centrifugal fan impeller, one end of a transmission shaft of the centrifugal fan is provided with two commutators which are not in contact with each other, and two ends of the coil winding are respectively connected with the two commutators; the two electric brushes are respectively contacted with the two commutators, and the two electric brushes and the heating device form a closed circuit.

Further, the impeller comprises fan blades and a transmission shaft, wherein the transmission shaft is provided with a plurality of blades, coil windings are installed on the surfaces of the blades, and the coil windings on the adjacent blades are connected in series.

Furthermore, the blade is preceding straight blade, 4 the blade equipartition is on the transmission shaft.

Further, an openable and closable shutter is radially installed at the air outlet of the casing.

Further, the flashboard is connected with an actuating mechanism and used for controlling the opening and closing of the air outlet.

The invention has the beneficial effects that:

1. according to the cleaning device of the combine harvester with controllable hot air flow, the heating wire is arranged at the air outlet through the design of the centrifugal fan device of the combine harvester with controllable hot air flow for cleaning the wet threshed objects, so that the air discharged by the centrifugal fan is heated by the heating wire at the air outlet and is changed into hot air to be sent out, hot air cleaning is realized, the moisture content of wet crops is reduced, the harvesting efficiency is improved, and the loss rate and the impurity rate are reduced.

2. According to the cleaning device of the combine harvester with controllable hot air flow, the magnetic pole pair is arranged in the casing, the coil winding is adhered to the blade of the fan, so that the impeller rotates in a magnetic field to generate air flow and simultaneously cut magnetic induction lines, kinetic energy is converted into electric energy, self-power generation is realized in the working process, the function of supplying power and heating for the electric heating wire is realized, a motor is not required to be arranged, and the economic benefit is improved.

3. According to the cleaning device of the combine harvester with controllable hot air flow, the movable flashboard is arranged at the air outlet, so that the flow of the hot air flow is controllable, and the cleaning device has important theoretical significance and practical value for improving the cleaning quality.

Drawings

Fig. 1 is a front view of a cleaning device of a combine harvester with controllable hot air flow, which is disclosed by the invention.

FIG. 2 is a schematic diagram of an impeller of the cleaning device of the combine harvester with controllable hot air flow.

FIG. 3 is a structure diagram of an impeller of a cleaning device of a combine harvester with controllable hot air flow.

In the figure:

1-a machine shell; 101-brush a; 102-brush B; 103-commutator a; 104-commutator B; 105-a shutter; 2-electric heating wire; 3-an impeller; 301-a drive shaft; 302-blade, 303-connecting plate, 304-coil winding, 4-air inlet.

Detailed Description

The invention will be further described with reference to the following figures and specific examples, but the scope of the invention is not limited thereto.

As shown in figure 1, the hot air flow controllable combine harvester centrifugal fan device for cleaning the wet threshed objects comprises a centrifugal fan, wherein a heating device is arranged at an air outlet of the centrifugal fan and used for drying threshed objects in the cleaning process. The heating device is an electric heating wire 2, and a plurality of electric heating wires 2 are circumferentially and uniformly distributed at an air outlet of the centrifugal fan. The heating wire 2 is arranged at the air outlet, so that the air discharged by the centrifugal fan is heated by the heating wire at the air outlet and is changed into hot air to be delivered, hot air cleaning is realized, the moisture content of wet crops is reduced, the harvesting efficiency is improved, and the loss rate and the impurity rate are reduced. The original fan needs to blow wet large impurities out of the machine in the cleaning process, but the wet large impurities contain a large amount of moisture, so the weight of the large impurities is heavier, and the large-power fan needs to blow the large impurities out of the machine. However, if the threshed grains are dried by hot air in the process of entering the cleaning area from the threshing cylinder, the threshed seeds can be dried not only by the light but also by the fan power required by the dried large grains which is less than that required by the wet large grains, thus the impurity rate can be reduced. In addition, the dried threshing seeds can be directly stored, and the drying before entering a grain bin in the later period is avoided. The heating device can also be arranged at the air inlet 4, but when the air inlet is arranged, hot air can only act on a cleaning area after passing through the impeller 3, so that certain energy waste is caused.

As shown in fig. 1, an openable shutter 105 is radially installed at the air outlet of the casing 1. The shutter 105 is connected with an actuating mechanism and used for controlling the opening and closing of the air outlet. The actuator may be a pneumatic or hydraulic cylinder.

As shown in fig. 2 and fig. 3, the present invention further includes a power generation device, the power generation device includes a pair of magnetic poles, a coil winding 304, a brush a101, a brush B102, a commutator a103, and a commutator B104, at least one pair of the magnetic poles is installed inside the casing 1 of the centrifugal fan for generating a magnetic field inside the casing 1; a coil winding 304 is wound on a blade of the centrifugal fan impeller 3, one end of a centrifugal fan transmission shaft 301 is provided with two mutually non-contact commutators A103 and B104, and two ends of the coil winding 304 are respectively connected with the commutators A103 and B104; brush a101 and brush B102 are in contact with commutator a103 and commutator B104, respectively, and brush a101 and brush B102 form a closed circuit with the heating device. The impeller 3 comprises fan blades 302 and a transmission shaft 301, wherein the transmission shaft 301 is provided with a plurality of blades 302, coil windings 304 are arranged on the surfaces of the blades 302, and the coil windings 304 on the adjacent blades 302 are connected in series. The blades 302 are forward straight blades, and 4 blades 302 are uniformly distributed on the transmission shaft 301 through a connecting plate 303. The blade 302 is wound with a coil winding 304, and the coil winding 304 is bonded to the blade 302 through an insulating material. In order to avoid leakage current caused by the damage of the insulation layer of the coil winding 304, the blade 302 is made of high-strength heat-resistant plastic.

The invention relates to a hot air flow controllable type combine harvester centrifugal fan device for cleaning wet threshed objects, which comprises the following specific implementation processes: in the working process of the hot air flow controllable type combine harvester centrifugal fan device for cleaning the wet threshed objects, the impeller 3 rotates through chain transmission, and the blades 302 always rotate in a magnetic field generated by the magnetic pole pair of the machine shell 1, so that the blades 302 generate air flow and the coil windings 304 on the blades cut magnetic induction lines, induced electromotive force and induced current are generated, the induced current is transmitted to the heating wire through the electric brushes and the commutator, the heating wire generates heat, and the air discharged by the centrifugal fan is heated by the heating wire at the air outlet and is changed into hot air to be discharged from the air outlet.

The present invention is not limited to the above-described embodiments, and any obvious improvements, substitutions or modifications can be made by those skilled in the art without departing from the spirit of the present invention.