CN214063341U

CN214063341U - Harvester fan

Info

Publication number: CN214063341U
Application number: CN202023337232.6U
Authority: CN
Inventors: 王军; 邢立成; 王馨瑶
Original assignee: Jiangsu World Agricultural Machinery Co Ltd
Current assignee: Jiangsu World Agricultural Machinery Co Ltd
Priority date: 2020-12-30
Filing date: 2020-12-30
Publication date: 2021-08-27
Anticipated expiration: 2030-12-30

Abstract

The utility model provides a harvester fan, including fan casing, fan structure and fan drive. The fan structure is arranged in a cylindrical installation cavity of the fan shell, and the two ends of the fan shell in the axial direction are respectively provided with a first air inlet communicated with the outside. An air outlet is formed in the side wall of the fan shell along the axial direction of the fan shell, and the width of the air outlet is the same as that of the installation cavity. And a second air inlet is formed in the side wall, opposite to the air outlet, of the fan shell along the circumferential direction of the side wall, and the second air inlet is located in the middle of the fan shell in the axial direction of the fan shell. The second air inlet is formed in the middle of the shell and matched with the first air inlets at two ends of the fan shell to form three air inlets which are uniformly distributed on the fan shell, so that enough air inlet amount is provided and air inlet is more uniform.

Description

Harvester fan

Technical Field

The utility model relates to the technical field of agricultural machinery, concretely relates to harvester fan.

Background

The crawler-type combine harvester threshing system can be divided into a longitudinal axial flow type threshing and cleaning system and a transverse axial flow type threshing and cleaning system, and the threshing and cleaning systems in the two forms are the main structural forms used in the current market.

The harvester is mainly internally divided into a threshing system, a screening system and a winnowing system from top to bottom, the winnowing system is used for continuously blowing air towards the tail of the harvester, the air blows the air to pass through a falling area of crop grains and a mesh screen surface in the screening system, and impurities such as grass fragments and fluff which are lighter than the crop grains are blown out to an opening at the tail of the harvester, so that the crop grains with high cleanliness can be collected.

In the existing transverse-axial flow type threshing and cleaning system, because the inner gear of a transverse-axial flow double-roller type threshing machine is wide, namely the working area of a threshing roller is wide, a conventional fan is adopted in a winnowing system below, wind cavities at two ends can be caused, the wind in the middle is weakened, the wind reaching the screen surface of a vibrating screen is uneven, and the winnowing effect is influenced.

SUMMERY OF THE UTILITY MODEL

Therefore, the to-be-solved technical problem of the utility model lies in overcoming the fan air supply among the prior art inhomogeneous, influences the selection by winnowing effect.

Therefore, the utility model provides a harvester fan, include:

the fan comprises a fan shell, a fan cover and a fan cover, wherein the fan shell is provided with a cylindrical installation cavity;

the fan structure is coaxially arranged in the mounting cavity;

the fan drive is connected with the fan structure and is suitable for driving the fan structure to rotate in the mounting cavity;

two ends of the fan shell in the axial direction are respectively provided with a first air inlet communicated with the outside;

an air outlet is formed in the side wall of the fan shell along the axial direction of the fan shell; the width of the air outlet is the same as that of the mounting cavity;

a second air inlet is formed in the side wall, opposite to the air outlet, of the fan shell along the circumferential direction of the side wall; and in the axial direction of the fan shell, the second air inlet is positioned in the middle of the fan shell.

And a wind shielding part is arranged on any one first air inlet and is suitable for changing the air inlet area of the first air inlet.

The wind shielding piece is of a plate-shaped structure; the wind deflector is slidably disposed on the fan housing.

Any one first air inlet is provided with two wind shielding pieces; the wind shielding part is arranged at one side of the first air inlet and the air outlet, is suitable for sliding transversely and partially shields the upper half part of the first air inlet;

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

A strip-shaped hole is formed in the wind shielding piece; the wind shielding piece is bolted and fixed on the fan shell through the strip-shaped holes.

The fan structure includes:

the fan shaft is coaxially arranged in the mounting cavity, and two ends of the fan shaft are respectively fixed on two bearings positioned on the rack;

the supporting units are fixed on the fan shaft at uniform intervals;

a plurality of fan blades fixed on the supporting unit;

any of the support units includes:

the fan blade supports are sequentially bolted, fixed and locked 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 supports enclose a regular polygon, and the regular polygon is circumscribed to a circle of the cross section of the fan shaft.

The fan blade support is bent to form a fixing section and an installation section; the end part of the mounting section is suitable for mounting the fan blade; an included angle alpha formed between the fixed section and the mounting section is complementary with an internal angle beta of a regular polygon formed by the fan blade support.

A flat-mouth groove is formed in the fan shaft corresponding to any one of the supporting units; one fan blade support is fixed in the flat-mouth groove.

The reinforcing plate is welded and fixed in the flat-mouth 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 depth of the flat-mouth groove; the width of the reinforcing plate in the radial direction of the fan shaft is not larger than the diameter of the fan shaft.

The fan shaft is provided with a plurality of flat-mouth grooves; the flat-mouth grooves and the fan blade supports are arranged in a one-to-one correspondence manner; the mounting section of the fan blade support is correspondingly fixed in the flat groove.

The utility model discloses technical scheme has following advantage:

1. the utility model provides a harvester fan, including fan casing, fan structure and fan drive. The fan structure is arranged in a cylindrical installation cavity of the fan shell, and the two ends of the fan shell in the axial direction are respectively provided with a first air inlet communicated with the outside. An air outlet is formed in the side wall of the fan shell along the axial direction of the fan shell, and the width of the air outlet is the same as that of the installation cavity. And a second air inlet is formed in the side wall, opposite to the air outlet, of the fan shell along the circumferential direction of the side wall, and the second air inlet is located in the middle of the fan shell in the axial direction of the fan shell. The second air inlet is formed in the middle of the shell and matched with the first air inlets at two ends of the fan shell to form three air inlets which are uniformly distributed on the fan shell, so that enough air inlet amount is provided and air inlet is more uniform.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic structural view of a fan casing according to an embodiment of the present invention;

FIG. 2 is a schematic view of an installation structure of a wind shielding member according to an embodiment of the present invention;

FIG. 3 is a schematic cross-sectional view of a fan structure according to an embodiment of the present invention;

fig. 4 is a schematic structural view of a fan shaft according to an embodiment of the present invention;

fig. 5 is a perspective view of a fan structure according to an embodiment of the present invention.

Description of reference numerals:

1. a frame; 3f, a fan shell; 31f, a first air inlet; 32f, a second air inlet; 33f, an air outlet;

1i, a fan shaft; 11i, a plain groove; 2i, fan blades; 3i, a fan blade bracket; 31i, a mounting section; 32i, a fixed section; 4i, a reinforcing plate; 51i, a first windshield; 52i and a second wind deflector.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.

Example 1

The present embodiment provides a harvester fan, as shown in fig. 1 and 2, including a fan housing 3f, a fan structure, and a fan drive.

The fan structure is installed in a cylindrical installation cavity of the fan shell 3f, and first air inlets 31f communicated with the outside are respectively formed in two ends of the fan shell 3f in the axial direction. The first air inlet 31f is a circular air inlet and is concentrically arranged with the cross section of the cylindrical mounting cavity. An air outlet 33f is formed in the side wall of the fan shell 3f along the axial direction of the fan shell, and the width of the air outlet 33f is the same as that of the installation cavity. The air outlet 33f may be provided with an air guide structure for guiding the air to be blown toward a predetermined direction.

As shown in fig. 1, a second air inlet 32f is formed in a side wall of the fan housing 3f opposite to the air outlet 33f along a circumferential direction of the fan housing 3 f. The projection of the second air inlet 32f on the horizontal plane is square. The second air inlet 32f is located at a middle position of the fan housing 3f in the axial direction of the fan housing 3 f. In this embodiment, the second air inlet 32f is located on the fan housing 3f obliquely above the air outlet 33 f. The second air inlet 32f is formed in the middle of the shell and matched with the first air inlets 31f at two ends of the fan shell 3f to form three air inlets which are uniformly distributed on the fan shell 3f, so that enough air inlet amount is provided and air inlet is more uniform.

As shown in fig. 2, each of the first air inlets 31f on both sides is provided with a wind shielding member, in this embodiment, the wind shielding member is a plate-shaped structure, and each of the first air inlets 31f is correspondingly provided with two wind shielding members, as shown in fig. 2, the two wind shielding members are respectively a first wind shielding plate 51i disposed on a side close to the air outlet 33f and located on an upper half portion of the first air inlet 31f, and a second wind shielding plate 52i disposed on a side far from the air outlet 33f and located on a lower half portion of the first air inlet 31 f. In this embodiment, a communicating opening communicated with the outside is formed in the casing of the frame 1 corresponding to the first air inlet 31f, the communicating opening is the same as the first air inlet 31f in size, two ends of the fan casing 3f are abutted against the casing of the frame 1, the first air inlet 31f is right opposite to the communicating opening, the first wind shielding plate 51i and the second wind shielding plate 52i are respectively provided with a strip-shaped hole, the corresponding fan casing 3f and the frame 1 are provided with matching holes, the strip-shaped hole on the first wind shielding plate 51i is horizontally arranged, so that the first wind shielding plate 51i can transversely slide and partially shield the upper half part of the first air inlet 31 f. The vertical setting of the bar hole on the second air baffle 52i to the vertical slip of second air baffle 52i and the local lower half that shelters from first air intake 31f, through sheltering from of the piece that keeps out the wind, with the air inlet area of adjusting first air intake 31f, under the operating mode condition of difference, change the intake, make its application scope wider.

As shown in fig. 5, the fan structure includes a fan shaft 1i, a plurality of support units, and a plurality of fan blades 2 i. As shown in fig. 2, both ends of the fan shaft 1i extend out of the first air inlet 31f and are rotatably fixed in bearing seats provided on the frame 1. And one end of the fan shaft 1i is provided with a driving belt wheel for connecting a transmission shaft and providing a driving force for rotating the fan structure.

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 units, as shown in fig. 3, each support unit comprises a plurality of fan blade brackets 3i, which are bolted and fixed on the fan shaft 1i in sequence along the circumferential direction of the fan shaft 1i and locked on the fan shaft 1i, and the fan blades 2i are bolted and fixed on the fan blade brackets 3i respectively.

In this embodiment, the fan blade supports 3i are plate-shaped structures, the fan blade supports 3i are bent to form a fixing section 32i and an installation section 31i, in the same supporting unit, the fixing section 32i of one fan blade support 3i is bolted and fixed on the installation section 31i of the other fan blade support 3i, the plurality of fan blade supports 3i are sequentially connected end to end, a polygon is defined by the circumference of the fan shaft 1i, and the polygon is circumscribed with a circle of the cross section of the fan shaft 1 i. Through the mode of bolt with a plurality of flabellum supports 3i fixed around fan axle 1i, simple structure is stable, and convenient and fast, the easy change is dismantled to spare part.

All fan blade supports 3i in any supporting unit enclose a regular polygon, and an included angle alpha formed between the fixing section 32i and the mounting section 31i is complementary with an inner angle beta of the regular polygon. As shown in fig. 3 or fig. 5, in this embodiment, four blade supports 3i are disposed in any one of the supporting units, and the fixing section 32i and the mounting section 31i in each blade support 3i are disposed at a right angle and jointly enclose a square shape circumscribing a cross-sectional circle of the fan shaft 1 i.

In this embodiment, as shown in fig. 4, a flat slot 11i is formed in a fan shaft 1i corresponding to any supporting unit, a reinforcing plate 4i is welded in the flat slot 11i, the thickness of the reinforcing plate 4i is the same as the depth of the flat slot 11i, that is, the upper surface of the reinforcing plate 4i is tangent to a circle of the cross section of the fan shaft 1i, and meanwhile, the radial width of the reinforcing plate 4i along the fan shaft 1i is not greater than the diameter of the fan shaft 1i, that is, the side length of a square surrounded by a fan blade support 3i is avoided being greater than the side length of the square, which results in assembly failure. In the present embodiment, the width of the reinforcing plate 4i is the same as the width of the flat groove 11 i. Through the limit of the flat slot 11i, the relative sliding between the fan blade support 3i and the fan shaft 1i caused by the small clamping force of the fan blade support 3i fixed on the fan shaft 1i is further avoided.

As shown in fig. 5, in this embodiment, four supporting units are sequentially disposed on the fan shaft 1i at intervals, four blades 2i are disposed on two supporting units located on the left side, the blades 2i are of a sheet structure, and each blade 2i spans over two supporting units and is bolted and fixed to the mounting sections 31i of the two blade brackets 3 i. The fan blades 2i on the two support units on the right side are arranged the same as on the left side, and the detailed structure is not described herein. Left and right sides flabellum 2i forms two sets of fan structures that are parallel, can provide more inlet air channel between two sets of fan structures for fan air supply area is big and the air supply is even.

As a first alternative embodiment of embodiment 1, a plurality of flat slots 11i may be formed in the fan shaft 1i, the flat slots 11i and the blade supports 3i are arranged in a one-to-one correspondence, and the blade supports 3i are directly and correspondingly embedded in the flat slots 11i, and are sequentially bolted end to be locked on the fan shaft 1 i.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications can be made without departing from the scope of the invention.

Claims

1. A harvester fan, comprising:

a fan housing (3f) having a cylindrical mounting cavity;

the fan structure is coaxially arranged in the mounting cavity;

two ends of the fan shell (3f) in the axial direction are respectively provided with a first air inlet (31f) communicated with the outside;

an air outlet (33f) is formed in the side wall of the fan shell (3f) along the axial direction of the side wall; the width of the air outlet (33f) is the same as that of the mounting cavity;

a second air inlet (32f) is formed in the side wall, opposite to the air outlet (33f), of the fan shell (3f) along the circumferential direction of the side wall; in the axial direction of the fan housing (3f), the second air inlet (32f) is located at the middle position of the fan housing (3 f).

2. The harvester fan of claim 1, wherein a wind shielding member is disposed on any one of the first wind inlets (31f) and adapted to change a wind inlet area of the first wind inlet (31 f).

3. The harvester fan of claim 2, wherein the wind shield is a plate-like structure; the wind deflector is slidably arranged on the fan housing (3 f).

4. The harvester fan of claim 3, wherein two wind shielding members are arranged on any one of the first wind inlets (31 f); the wind shielding part is arranged at one side of the first air inlet (31f) at the air outlet (33f), is suitable for transversely sliding and partially shields the upper half part of the first air inlet (31 f);

the other wind shielding piece is arranged on one side, away from the air outlet (33f), of the first air inlet (31f) and is suitable for vertically sliding and partially shielding the lower half part of the first air inlet (31 f).

5. The harvester fan of claim 4, wherein the wind shield is provided with a strip-shaped hole; the wind shielding piece is bolted and fixed on the fan shell (3f) through the strip-shaped holes.

6. The harvester fan of any one of claims 1-5, wherein the fan structure comprises:

the fan shaft (1i) is coaxially arranged in the mounting cavity, and two ends of the fan shaft are respectively fixed on two bearings positioned on the rack (1);

a plurality of supporting units which are fixed on the fan shaft (1i) at uniform intervals;

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

any of the support units includes:

a plurality of fan blade (2i) brackets bolted and fixed to the fan shaft (1i) in this order in the circumferential direction of the fan shaft (1i) and locked to the fan shaft (1 i); the fan blades (2i) are respectively bolted and fixed on the fan blade (2i) bracket; all the fan blade (2i) supports enclose a regular polygon, and the regular polygon is circumscribed to a circle of the cross section of the fan shaft (1 i).

7. Harvester fan according to claim 6, characterized in that the fan blade (2i) support is bent to form a fixing section (32i) and a mounting section (31 i); the end of the mounting section (31i) is suitable for mounting the fan blade (2 i); an included angle alpha formed between the fixing section (32i) and the mounting section (31i) is complementary with an internal angle beta of a regular polygon formed by the fan blade (2i) bracket.

8. The harvester fan of claim 7, wherein the fan shaft (1i) corresponding to any one of the support units is provided with a flat slot (11 i); one fan blade (2i) bracket is fixed in the flat groove (11 i).

9. The harvester fan of claim 8, further comprising a stiffening plate (4i) welded and fixed within the flat slot (11 i); the fan blade (2i) bracket is fixed on the upper surface of the reinforcing plate (4 i); the thickness of the reinforcing plate (4i) is the same as the groove depth of the flat groove (11 i); the width of the reinforcing plate (4i) in the radial direction of the fan shaft (1i) is not greater than the diameter of the fan shaft (1 i).

10. Harvester fan according to claim 7, characterized in that the fan shaft (1i) is provided with a plurality of flat slots (11 i); the flat-mouth grooves (11i) are arranged in one-to-one correspondence with the fan blade (2i) brackets; and the mounting section (31i) of the fan blade (2i) bracket is correspondingly fixed in the flat slot (11 i).