WO2022142002A1

WO2022142002A1 - Harvester fan

Info

Publication number: WO2022142002A1
Application number: PCT/CN2021/090156
Authority: WO
Inventors: 王军; 邢立成; 王馨瑶
Original assignee: 江苏沃得农业机械股份有限公司
Priority date: 2020-12-30
Filing date: 2021-04-27
Publication date: 2022-07-07
Also published as: CN112628175A

Abstract

A harvester fan, comprising a fan housing (3f), a fan structure and a fan driver, wherein the fan structure is mounted in a cylindrical mounting cavity of the fan housing; two ends of the fan housing in an axial direction are respectively provided with a first air inlet (31f) in communication with the outside; a side wall of the fan housing (3f) is provided with an air outlet (33f) in the axial direction of the fan housing; the width of the air outlet (33f) is the same as that of the mounting cavity; the side wall of the fan housing (3f) that is opposite the air outlet (33f) is provided with a second air inlet (32f) in a circumferential direction of the fan housing; and in the axial direction of the fan housing (3f), the second air inlet (32f) is located in the middle of the fan housing (3f). The middle of the fan housing (3f) is provided with the second air inlet (32f), such that the second air inlet and the first air inlets (31f) at the two ends of the fan housing (3f) form three air inlets that are evenly distributed in the fan housing, thus making air intake more uniform while providing a sufficient air intake amount.

Description

A harvester fan

technical field

The application relates to the technical field of agricultural machinery, in particular to a harvester fan.

Background technique

Crawler-type combine harvester threshing system can be divided into crawler-type combine harvester threshing system can be divided into longitudinal axial flow threshing and cleaning system and horizontal axial flow threshing and cleaning system, these two forms of threshing and cleaning system are the current market The main structural form used above.

The interior of the harvester is mainly divided into a threshing system, a screening system and an air selection system from top to bottom. The function of the air selection system is to continuously blow air towards the rear of the harvester, and the air blows through the drop area of the crop seeds and the mesh screen in the screening system. The surface of the harvester is blown out to the rear opening of the harvester, so as to collect the crop grains with high cleanliness.

In the existing horizontal axial flow threshing and cleaning system, due to the width of the inner gear of the horizontal axial flow double drum type threshing machine, that is, the width of the working area of the threshing drum, the conventional fan is used in the air separation system below, which will cause two problems. At the end of the wind chamber, the wind in the middle is weakened, and the wind reaching the screen surface of the vibrating screen is uneven, which affects the effect of wind selection.

SUMMARY OF THE INVENTION

Therefore, the technical problem to be solved by the present application is to overcome the uneven air supply of the fan in the prior art, which affects the effect of wind selection.

To this end, the present application proposes a harvester fan, comprising:

A fan housing, which has a cylindrical mounting cavity;

a fan structure, coaxially arranged in the installation cavity;

a fan drive, connected to the fan structure, suitable for driving the fan structure to rotate in the installation cavity;

Both ends of the fan casing in the axial direction are respectively provided with first air inlets communicating with the outside world;

An air outlet is provided on the side wall of the fan housing along its axial direction; the width of the air outlet is the same as the width of the installation cavity;

A second air inlet is provided on the side wall of the fan casing opposite to the air outlet along its circumferential direction; in the axial direction of the fan casing, the second air inlet is located in the fan the middle position of the shell.

Any one of the first air inlets is provided with a wind shield, which is suitable for changing the air inlet area of the first air inlet.

The wind shield is a plate-like structure; the wind shield is slidably arranged on the fan casing.

Any one of the first air inlets is provided with two windshields; one of the windshields is arranged on the side of the first air inlet on the side of the air outlet, and is suitable for lateral sliding and partially shielding the The upper half of the first air inlet;

The other wind shield is arranged on the side of the first air inlet away from the air outlet, and is suitable for sliding vertically and partially shielding the lower half of the first air inlet.

A strip hole is formed on the wind shield; the wind shield is bolted and fixed on the fan casing through the strip hole.

The fan structure includes:

The fan shaft is coaxially arranged in the installation cavity, and the two ends of the fan shaft are respectively fixed on two bearings located on the frame;

A plurality of support units are fixed on the fan shaft at even intervals;

a plurality of fan blades fixed on the support unit;

Any of the supporting units includes:

A plurality of fan blade brackets are sequentially bolted and fixed on the fan shaft along the circumferential direction of the fan shaft; the fan blades are respectively bolted and fixed on the fan blade brackets; all the fan blade brackets A regular polygon is enclosed, and the regular polygon circumscribes the circle of the cross section of the fan shaft.

The fan blade bracket is bent and arranged to form a fixed section and an installation section; the end of the installation section is suitable for installing the fan blade; the angle α formed between the fixed section and the installation section and the fan blade The interior angles β of the regular polygon enclosed by the leaf support are complementary.

A flat slot is set on the fan shaft corresponding to any one of the supporting units; one of the fan blade supports is fixed in the flat slot.

It also includes a reinforcing plate, which is welded and fixed in the flat groove; the fan blade bracket is fixed on the upper surface of the reinforcing plate; the thickness of the reinforcing plate is the same as the groove depth of the flat groove; The width of the plate in the radial direction of the fan shaft is not greater than the diameter of the fan shaft.

The fan shaft is provided with a plurality of flat grooves; the flat grooves are arranged in a one-to-one correspondence with the fan blade support; the installation sections of the fan blade support are correspondingly fixed in the flat grooves.

The technical solution of the present application has the following advantages:

1. The harvester fan provided by this application includes a fan casing, a fan structure and a fan drive. The fan structure is installed in the cylindrical installation cavity of the fan casing, and the two ends in the axial direction of the fan casing are respectively provided with first air inlets communicating with the outside. The side wall of the fan casing is provided with an air outlet along its axial direction, and the width of the air outlet is the same as that of the installation cavity. The side wall of the fan casing opposite to the air outlet is provided with a second air inlet along its circumferential direction, and the second air inlet is located in the middle of the fan casing in the axial direction of the fan casing. A second air inlet is opened in the middle of the casing, and the first air inlets at both ends of the fan casing are combined to form three air inlets evenly distributed on the fan casing, providing sufficient air intake and making the air intake more uniform.

Description of drawings

In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the accompanying drawings required in the description of the specific embodiments or the prior art will be briefly introduced below. The drawings are some embodiments of the present application. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without any creative effort.

1 is a schematic structural diagram of a fan casing in an embodiment of the application;

FIG. 2 is a schematic diagram of the installation structure of the windshield in the embodiment of the application;

3 is a schematic cross-sectional view of a fan structure in an embodiment of the application;

4 is a schematic structural diagram of a fan shaft in an embodiment of the application;

FIG. 5 is a perspective view of a fan structure in an embodiment of the present application.

Description of reference numbers:

1. Rack; 3f, fan housing; 31f, first air inlet; 32f, second air inlet; 33f, air outlet;

1i, fan shaft; 11i, flat groove; 2i, fan blade; 3i, fan blade bracket; 31i, installation section; 32i, fixed section; 4i, reinforcing plate; 51i, first windshield; 52i, second windshield plate.

Detailed ways

The technical solutions of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

In the description of this application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation or a specific orientation. construction and operation, and therefore should not be construed as limitations on this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed to indicate or imply relative importance.

In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection Connection, or integral connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood in specific situations.

In addition, the technical features involved in the different embodiments of the present application described below can be combined with each other as long as there is no conflict with each other.

Example 1

This embodiment provides a harvester fan, as shown in FIG. 1 and FIG. 2 , including a fan casing 3f, a fan structure, and a fan drive.

The fan structure is installed in the cylindrical installation cavity of the fan casing 3f, and the two ends of the fan casing 3f in the axial direction are respectively provided with first air inlets 31f which communicate with the outside world. The first air inlet 31f is a circular air inlet and is arranged concentrically with the cross section of the cylindrical installation cavity. An air outlet 33f is provided on the side wall of the fan housing 3f along its axial direction, and the width of the air outlet 33f is the same as that of the installation cavity. An air guide structure can be installed on the air outlet 33f, so as to guide the air to blow in a set direction.

As shown in FIG. 1 , a second air inlet 32f is formed on the side wall of the fan casing 3f opposite to the air outlet 33f along the circumferential direction of the fan casing 3f. The projection of the second air inlet 32f on the horizontal plane is a square. In the axial direction of the fan casing 3f, the second air inlet 32f is located at the middle position of the fan casing 3f. In this embodiment, the second air inlet 32f is located on the fan housing 3f obliquely above the air outlet 33f. A second air inlet 32f is opened in the middle of the casing, and cooperates with the first air inlets 31f at both ends of the fan casing 3f to form three air inlets evenly distributed on the fan casing 3f, providing sufficient air intake volume and making the air intake more even.

As shown in FIG. 2 , each first air inlet 31f on both sides is provided with a wind shield. In this embodiment, the wind shield is a plate-like structure, and each first air inlet 31f is correspondingly provided with two shields. As shown in FIG. 2, the two wind shields are respectively a first wind shield 51i arranged on the side close to the air outlet 33f and located on the upper half of the first air inlet 31f, and a first wind shield 51i arranged on a side away from the air outlet 33f. The second wind deflector 52i on the side and located at the lower half of the first air inlet 31f. In this embodiment, the casing of the rack 1 is provided with a communication port corresponding to the first air inlet 31f to communicate with the outside world. The size of the communication port is the same as that of the first air inlet 31f. On the shell of the rack 1, and the first air inlet 31f is directly opposite to the communication port, the first air baffle 51i and the second air baffle 52i are respectively provided with strip holes, and the corresponding fan casing 3f and the rack 1 is provided with matching holes, and the strip-shaped holes on the first wind deflector 51i are arranged horizontally, so that the first wind deflector 51i can slide laterally and partially block the upper half of the first air inlet 31f. The strip holes on the second wind deflector 52i are arranged vertically, so that the second wind deflector 52i can slide vertically and partially block the lower half of the first air inlet 31f. The air intake area of the air inlet 31f changes the air intake volume under different working conditions to make it applicable to a wider range.

As shown in FIG. 5 , the fan structure includes a fan shaft 1i, a plurality of support units and a plurality of fan blades 2i. As shown in FIG. 2 , both ends of the fan shaft 1i protrude from the first air inlet 31f and are rotatably fixed in the bearing seat on the frame 1 . And one end of the fan shaft 1i is installed with a driving pulley, which is used to connect the transmission shaft and provide the driving force for the rotation of the fan structure. In this embodiment, the fan is driven by a belt drive.

As shown in FIG. 5 , the support units are fixed on the fan shaft 1i at regular intervals, and the fan blades 2i are fixed on the support unit. As shown in FIG. 3 , each support unit includes a plurality of fan blade brackets 3i, along the circumference of the fan shaft 1i The fan blades 2i are bolted and fixed to the fan blade brackets 3i respectively.

In this embodiment, the fan blade bracket 3i is a plate-like structure, and the fan blade bracket 3i is bent to form a fixed section 32i and an installation section 31i. In the same support unit, the fixed section 32i of one fan blade bracket 3i is bolted and fixed to the other. On the installation section 31i of the fan blade bracket 3i, a plurality of fan blade brackets 3i are connected end to end in sequence, forming a polygon around the fan shaft 1i, and the polygon circumscribes the circle of the cross section of the fan shaft 1i. The plurality of fan blade brackets 3i are fixed around the fan shaft 1i by means of bolting, the structure is simple and stable, and the parts are easily and quickly disassembled and replaced.

All fan blade supports 3i in any supporting unit form a regular polygon, and the included angle α formed between the fixed segment 32i and the mounting segment 31i is complementary to the interior angle β of the regular polygon. As shown in FIG. 3 or FIG. 5 , in this embodiment, four fan blade brackets 3i are arranged in any supporting unit, and the fixed section 32i and the installation section 31i in each fan blade bracket 3i are arranged at right angles, and together they enclose an outer circumference. The cross-sectional circle of the fan shaft 1i is a square.

In this embodiment, as shown in FIG. 4 , a flat groove 11i is formed on the fan shaft 1i corresponding to any support unit, and a reinforcing plate 4i is welded in the flat groove 11i. The thickness of the reinforcing plate 4i is the same as the groove depth of the flat groove 11i. , that is, the upper surface of the reinforcing plate 4i is in a tangent state with the circle of the cross section of the fan shaft 1i, and the width of the reinforcing plate 4i along the radial direction of the fan shaft 1i is not greater than the diameter of the fan shaft 1i, that is, it is avoided to be larger than the fan blade bracket 3i. The side length of the square makes it impossible to assemble. In this embodiment, the width of the reinforcing plate 4i is the same as the width of the flat groove 11i. The position of the flat groove 11i further avoids relative sliding between the fan blade bracket 3i and the fan shaft 1i due to the small clamping force of the fan blade bracket 3i fixed on the fan shaft 1i.

As shown in FIG. 5 , in this embodiment, four supporting units are arranged on the fan shaft 1i at intervals in sequence, and four fan blades 2i are arranged on the two supporting units on the left side. The fan blades 2i are sheet-like structures. The blade 2i spans the two support units and is bolted to the mounting sections 31i of the two blade brackets 3i. The fan blades 2i on the two supporting units on the right are the same as those on the left, and the specific structures are not repeated here. The fan blades 2i on the left and right sides form two parallel fan structures, and more air inlet channels can be provided between the two fan structures, so that the fan has a large air supply area and uniform air supply.

As a first alternative embodiment of Embodiment 1, a plurality of flat grooves 11i may be opened on the fan shaft 1i, and the flat grooves 11i are arranged in a one-to-one correspondence with the fan blade brackets 3i, and the fan blade brackets 3i are directly embedded in the corresponding The flat grooves 11i are bolted end to end and locked on the fan shaft 1i.

Obviously, the above-mentioned embodiments are only examples for clear description, and are not intended to limit the implementation manner. For those of ordinary skill in the art, changes or modifications in other different forms can also be made on the basis of the above description. There is no need and cannot be exhaustive of all implementations here. However, the obvious changes or changes derived from this are still within the protection scope of the present application.

Claims

A harvester fan, comprising:

a fan housing (3f), which has a cylindrical mounting cavity;

a fan structure, coaxially arranged in the installation cavity;

a fan drive, connected to the fan structure, suitable for driving the fan structure to rotate in the installation cavity;

Both ends of the fan casing (3f) in the axial direction are respectively provided with first air inlets (31f) communicating with the outside world;

An air outlet (33f) is provided on the side wall of the fan housing (3f) along its axial direction; the width of the air outlet (33f) is the same as the width of the installation cavity;

A second air inlet (32f) is provided on the side wall of the fan casing (3f) opposite to the air outlet (33f) along its circumferential direction; in the axial direction of the fan casing (3f) , the second air inlet (32f) is located in the middle of the fan housing (3f).
The harvester fan according to claim 1, characterized in that, any one of the first air inlets (31f) is provided with a wind shield, which is suitable for changing the air inlet area of the first air inlet (31f).
The harvester fan according to claim 2, characterized in that, the wind blocking member is a plate-like structure; and the wind blocking member is slidably arranged on the fan casing (3f).
The harvester fan according to claim 3, characterized in that, any one of the first air inlets (31f) is provided with two of the wind shields; The air outlet (31f) is located on one side of the air outlet (33f), and is adapted to slide laterally and partially block the upper half of the first air inlet (31f);

The other said wind shield is arranged on the side of the first air inlet (31f) away from the air outlet (33f), and is suitable for sliding vertically and partially blocking the lower half of the first air inlet (31f). .
The harvester fan according to claim 4, characterized in that a strip-shaped hole is provided on the windshield; the windshield is bolted and fixed to the fan casing (3f) through the strip-shaped hole superior.
The harvester fan according to any one of claims 1 to 5, wherein the fan structure comprises:

The fan shaft (1i) is coaxially arranged in the installation cavity, and its two ends are respectively fixed on two bearings located on the frame (1);

a plurality of support units fixed on the fan shaft (1i) at even intervals;

a plurality of fan blades (2i) fixed on the support unit;

Any of the supporting units includes:

A plurality of fan blade (2i) brackets are sequentially bolted and fixed on the fan shaft (1i) along the circumferential direction of the fan shaft (1i); the fan blades (2i) are respectively bolted and fixed on the fan shaft (1i). All the fan blades (2i) supports form a regular polygon, and the regular polygon circumscribes the circle of the cross section of the fan shaft (1i).
The harvester fan according to claim 6, wherein the fan blade (2i) bracket is bent and arranged to form a fixed section (32i) and an installation section (31i); the end of the installation section (31i) is suitable for For installing the fan blade (2i); the angle α formed between the fixed section (32i) and the installation section (31i) is complementary to the inner angle β of the regular polygon enclosed by the fan blade (2i) bracket .
The harvester fan according to claim 7, characterized in that, a flat groove (11i) is defined on the fan shaft (1i) corresponding to any one of the support units; one of the fan blades (2i) is fixed to a bracket in the flat groove (11i).
The harvester fan according to claim 8, further comprising a reinforcing plate (4i), which is welded and fixed in the flat groove (11i); the fan blade (2i) bracket is fixed on the reinforcing plate (11i). 4i) on the upper surface; the thickness of the reinforcing plate (4i) is the same as the groove depth dimension of the flat groove (11i); the width of the reinforcing plate (4i) along the radial direction of the fan shaft (1i) is different. larger than the diameter of the fan shaft (1i).
The harvester fan according to claim 7, characterized in that, a plurality of flat grooves (11i) are provided on the fan shaft (1i); Correspondingly arranged; the mounting section (31i) of the fan blade (2i) bracket is correspondingly fixed in the flat groove (11i).