WO2022141991A1 - 一种收割机风扇结构 - Google Patents

一种收割机风扇结构 Download PDF

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Publication number
WO2022141991A1
WO2022141991A1 PCT/CN2021/090089 CN2021090089W WO2022141991A1 WO 2022141991 A1 WO2022141991 A1 WO 2022141991A1 CN 2021090089 W CN2021090089 W CN 2021090089W WO 2022141991 A1 WO2022141991 A1 WO 2022141991A1
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WIPO (PCT)
Prior art keywords
fan
fixed
fan blade
shaft
harvester
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PCT/CN2021/090089
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English (en)
French (fr)
Inventor
王军
邢立成
王佳军
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江苏沃得农业机械股份有限公司
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Publication of WO2022141991A1 publication Critical patent/WO2022141991A1/zh

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
    • F04D29/30—Vanes
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01D—HARVESTING; MOWING
    • A01D41/00—Combines, i.e. harvesters or mowers combined with threshing devices
    • A01D41/12—Details of combines
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01F—PROCESSING OF HARVESTED PRODUCE; HAY OR STRAW PRESSES; DEVICES FOR STORING AGRICULTURAL OR HORTICULTURAL PRODUCE
    • A01F12/00—Parts or details of threshing apparatus
    • A01F12/44—Grain cleaners; Grain separators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/263—Rotors specially for elastic fluids mounting fan or blower rotors on shafts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/60—Mounting; Assembling; Disassembling
    • F04D29/62—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps
    • F04D29/624—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
    • F04D29/626—Mounting or removal of fans

Definitions

  • the present application relates to the technical field of agricultural machinery, in particular to a harvester fan structure.
  • 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 currently the market
  • 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
  • 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.
  • each fan blade in the fan is fixed on the fan shaft by welding. Due to the influence of the manual welding process, it is easy to lead to de-soldering or even leakage of welding, resulting in unstable fan structure and high-speed rotation. There are hidden safety hazards, and when the fan blades are damaged, the process of replacing the fan blades is complicated and costly, resulting in a waste of resources.
  • the technical problem to be solved by the present application is to overcome the poor firmness of the fan blades in the prior art, the complicated replacement process and the high cost.
  • a harvester fan structure including:
  • the fan shaft the two ends of which are respectively fixed on two bearings located on the frame;
  • a plurality of support units are fixed on the fan shaft at even intervals
  • 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 polygon is enclosed, and the polygon is circumscribed to the circle of the cross section of the fan shaft.
  • All the fan blade supports in any one of the supporting units enclose a regular polygon.
  • the fan blade support is a plate-like structure.
  • 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 ⁇ formed between the fixed section and the installation section and the fan blade
  • the interior angles ⁇ of the regular polygon enclosed by the leaf support are complementary.
  • the fixing section of one of the fan blade supports is bolted and fixed on the installation section of the other fan blade support.
  • 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 width of the reinforcing plate is the same as the width of the flat groove.
  • 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 supports; the fan blade supports are correspondingly fixed in the flat grooves.
  • the fan blades are bridged and fixed on the two fan blade brackets in the two adjacent support units.
  • the harvester fan structure provided by this application includes a fan shaft, a plurality of support units and a plurality of fan blades, the support units are fixed on the fan shaft at even intervals, the fan blades are fixed on the support unit, and each support unit includes a plurality of fans.
  • the blade supports are sequentially bolted and fixed on the fan shaft along the circumferential direction of the fan shaft, and the fan blades are bolted and fixed on the fan blade supports respectively. All the fan blade supports form a polygon, and the polygon circumscribes the circle of the cross section of the fan shaft.
  • the plurality of fan blade brackets are fixed around the fan shaft by means of bolting, the structure is simple and stable, and the parts are disassembled and replaced easily and quickly.
  • the harvester fan structure provided by this application has a flat groove on the fan shaft, and the fan blade bracket is fixed in the flat groove.
  • the small clamping force causes relative sliding between the fan blade bracket and the fan shaft.
  • FIG. 1 is a schematic cross-sectional view of a fan structure in an embodiment of the application
  • FIG. 2 is a schematic structural diagram of a fan shaft in an embodiment of the application.
  • FIG. 3 is a perspective view of a fan structure in an embodiment of the present application.
  • 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.
  • installed 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.
  • This embodiment provides a harvester fan structure, as shown in FIG. 3 , including a fan shaft 1i, a plurality of support units and a plurality of fan blades 2i, the support units are fixed on the fan shaft 1i at regular intervals, and the fan blades 2i are fixed on the support unit 1, each support unit includes a plurality of fan blade brackets 3i, which are bolted and fixed on the fan shaft 1i along the circumferential direction of the fan shaft 1i and locked on the fan shaft 1i, and the fan blades 2i are respectively bolted and fixed to the fan blades on the stand 3i.
  • 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.
  • the fixed section 32i of one fan blade bracket 3i is bolted and fixed to the other.
  • 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 ⁇ formed between the fixed segment 32i and the mounting segment 31i is complementary to the interior angle ⁇ of the regular polygon.
  • 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.
  • 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, and 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 length of the side of the square makes it impossible to assemble.
  • 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 support 3i and the fan shaft 1i due to the small clamping force of the fan blade support 3i fixed on the fan shaft 1i.
  • each fan The blade 2i bridges the two support units and is bolted to the mounting sections 31i of the two blade brackets 3i.
  • the setting of the fan blades 2i on the two supporting units on the right side is the same as that on the left side, and the specific structure will not be repeated here.
  • the fan blades 2i on the left and right sides form two parallel fan structures, and more air intake channels can be provided between the two fan structures, so that the fan has a large air supply area and uniform air supply.
  • 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.
  • Example 1 when a support unit correspondingly defines a flat groove 11i on the fan shaft 1i, the reinforcing plate 4i is welded and fixed on one of the fan blade brackets 3i in the support unit to strengthen the The plate 4i is embedded in the flat groove 11i to limit the position of the fan blade support 3i in the axial direction of the fan shaft 1i.
  • the remaining fan blade brackets 3i in the support unit and the fan blade brackets 3i welded to the reinforcing plate 4i are jointly enclosed and limited on the fan shaft 1i.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental Sciences (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

一种收割机风扇结构，包括风扇轴（1i）、若干支撑单元和多个扇叶（2i），支撑单元均匀间隔固定在风扇轴上，扇叶固定在支撑单元上，每个支撑单元包括多个扇叶支架（3i），沿风扇轴的周向顺序栓接固定并锁止在风扇轴上，扇叶分别栓接固定在扇叶支架上。所有扇叶支架围成多边形，且该多边形外切于风扇轴横截面的圆。通过栓接的方式将多个扇叶支架围绕风扇轴固定，结构简单稳定，零部件拆卸方便快捷，易于更换。

Description

一种收割机风扇结构 技术领域
本申请涉及农业机械技术领域，具体涉及一种收割机风扇结构。
背景技术
履带式联合收割机脱粒系统可分为履带式联合收割机脱粒系统可分为纵轴流式脱粒清选系统与横轴流式脱粒清选系统，此两种形式的脱粒清选系统为目前市场上使用的主要结构形式。
收割机内部自上而下主要分为脱粒系统、筛选系统和风选系统，风选系统的作用是朝向收割机尾部持续不断的吹风，吹风通过作物籽粒的掉落区以及筛选系统中的网孔筛面，将比作物籽粒重量轻的碎草、绒毛等杂余向收割机尾部开口吹出，以便收集到洁净度高的作物籽粒。
现在的风选系统中，风机中的每一片扇叶均通过焊接的方式固定在风扇轴上，受人工焊接工艺的影响，容易导致脱焊甚至漏焊，造成风扇结构不稳定，高速旋转下存在安全隐患，且当扇叶出现破损时候，更换扇叶的工序复杂、成本高，造成资源浪费。
发明内容
因此，本申请要解决的技术问题在于克服现有技术中扇叶牢固性差且更换工序繁琐、成本高。
为此，本申请提出一种收割机风扇结构，包括：
风扇轴，其两端分别固定在位于机架上的两个轴承上；
若干支撑单元，均匀间隔固定在所述风扇轴上；
多个扇叶，固定在所述支撑单元上；
任一所述支撑单元包括：
多个扇叶支架，沿所述风扇轴的周向顺序栓接固定并锁止在所述风扇轴上；所述扇叶分别栓接固定在所述扇叶支架上；所有所述扇叶支架围成多边形，且该多边形外切于所述风扇轴横截面的圆。
任一所述支撑单元中的所有所述扇叶支架围成正多边形。
所述扇叶支架为板状结构。
所述扇叶支架折弯设置形成固定段和安装段；所述安装段的端部适于安装所述扇叶；所述固定段与所述安装段之间形成的夹角α与所述扇叶支架围成的正多边形的内角β互补。
其一所述扇叶支架的固定段栓接固定在另一所述扇叶支架的安装段上。
任一所述支撑单元对应的所述风扇轴上开设一个平口槽；其一所述扇叶支架固定在所述平口槽内。
还包括加强板，焊接固定在所述平口槽内；所述扇叶支架固定在所述加强板的上表面上；所述加强板的厚度与所述平口槽的槽深尺寸相同；所述加强板沿所述风扇轴径向的宽度不大于所述风扇轴的直径。
在所述风扇轴的径向方向上，所述加强板的宽度与所述平口槽的宽度尺寸相同。
所述风扇轴上开设多个平口槽；所述平口槽与所述扇叶支架一一对应设置；所述扇叶支架对应固定在所述平口槽内。
所述扇叶跨接固定在相邻两个所述支撑单元内的两个所述扇叶支架上。
本申请技术方案，具有如下优点：
1.本申请提供的收割机风扇结构，包括风扇轴、若干支撑单元和多个扇叶，支撑单元均匀间隔固定在风扇轴上，扇叶固定在支撑单元上，每个支撑单元包括多个扇叶支架，沿风扇轴的周向顺序栓接固定并锁止在风扇 轴上，扇叶分别栓接固定在扇叶支架上。所有扇叶支架围成多边形，且该多边形外切于风扇轴横截面的圆。通过栓接的方式将多个扇叶支架围绕风扇轴固定，结构简单稳定，零部件拆卸方便快捷，易于更换。
2.本申请提供的收割机风扇结构，在风扇轴上开设平口槽，并将扇叶支架固定在平口槽内，通过平口槽的限位，进一步避免了由于扇叶支架固定在风扇轴上的夹持力较小造成扇叶支架与风扇轴之间产生相对滑动。
附图说明
为了更清楚地说明本申请具体实施方式或现有技术中的技术方案，下面将对具体实施方式或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图是本申请的一些实施方式，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1为本申请实施例中风扇结构的横截面示意图；
图2为本申请实施例中风扇轴的结构示意图；
图3为本申请实施例中风扇结构的立体图。
附图标记说明：
1i、风扇轴；11i、平口槽；2i、扇叶；3i、扇叶支架；31i、安装段；32i、固定段；4i、加强板。
具体实施方式
下面将结合附图对本申请的技术方案进行清楚、完整地描述，显然，所描述的实施例是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得 的所有其他实施例，都属于本申请保护的范围。
在本申请的描述中，需要说明的是，术语“中心”、“上”、“下”、“左”、“右”、“竖直”、“水平”、“内”、“外”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本申请和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请的限制。此外，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性。
在本申请的描述中，需要说明的是，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通。对于本领域的普通技术人员而言，可以具体情况理解上述术语在本申请中的具体含义。
此外，下面所描述的本申请不同实施方式中所涉及的技术特征只要彼此之间未构成冲突就可以相互结合。
实施例1
本实施例提供一种收割机风扇结构，如图3所示，包括风扇轴1i、若干支撑单元和多个扇叶2i，支撑单元均匀间隔固定在风扇轴1i上，扇叶2i固定在支撑单元上，如图1所示，每个支撑单元包括多个扇叶支架3i，沿风扇轴1i的周向顺序栓接固定并锁止在风扇轴1i上，扇叶2i分别栓接固定在扇叶支架3i上。
本实施例中，扇叶支架3i为板状结构，扇叶支架3i折弯形成固定段 32i和安装段31i，同一支撑单元中，其一扇叶支架3i的固定段32i栓接固定在另一扇叶支架3i的安装段31i上，多个扇叶支架3i依次首尾相接，在风扇轴1i的周向围成多边形，且该多边形外切于风扇轴1i横截面的圆。通过栓接的方式将多个扇叶支架3i围绕风扇轴1i固定，结构简单稳定，零部件拆卸方便快捷，易于更换。
任一支撑单元中所有扇叶支架3i围成正多边形，固定段32i与安装段31i之间形成的夹角α与正多边形的内角β互补。如图1或图3所示，本实施例中，任一支撑单元中设置四个扇叶支架3i，每个扇叶支架3i中的固定段32i和安装段31i呈直角设置，共同围成外接于风扇轴1i的截面圆的正方形。
本实施例中，如图2所示，任一支撑单元对应的风扇轴1i上开设一个平口槽11i，平口槽11i内焊接加强板4i，加强板4i的厚度与平口槽11i的槽深尺寸相同，即加强板4i的上表面与风扇轴1i横截面的圆呈相切状态，同时加强板4i沿风扇轴1i径向的宽度不大于风扇轴1i的直径，即避免大于扇叶支架3i围成的正方形的边长，导致无法装配。本实施例中，加强板4i的宽度与平口槽11i的宽度尺寸相同。通过平口槽11i的限位，进一步避免了由于扇叶支架3i固定在风扇轴1i上的夹持力较小造成扇叶支架3i与风扇轴1i之间产生相对滑动。
如图3所示，本实施例中，风扇轴1i上依次间隔设置四个支撑单元，位于左侧的两个支撑单元上设置四片扇叶2i，扇叶2i为片状结构，每片扇叶2i跨接两个支撑单元并栓接固定在两个扇叶支架3i的安装段31i上。位于右侧的两个支撑单元上的扇叶2i设置与左侧相同，具体结构在此不再赘述。左右两侧扇叶2i形成并列的两组风扇结构，两组风扇结构之间能够提供更多的进风通道，使得风扇送风面积大且送风均匀。
作为实施例1的第一个可替换的实施方式，在风扇轴1i上可以开设多个平口槽11i，且平口槽11i与扇叶支架3i一一对应设置，扇叶支架3i直 接对应嵌设在平口槽11i内，并依次首尾栓接，锁止在风扇轴1i上。
作为实施例1的第二个可替换的实施方式，当一个支撑单元对应在风扇轴1i上开设一个平口槽11i时，加强板4i焊接固定在支撑单元中的其一扇叶支架3i上，加强板4i嵌设在平口槽11i中，对该扇叶支架3i起到风扇轴1i轴向上的限位作用。支撑单元中其余扇叶支架3i与焊接加强板4i的扇叶支架3i共同围设限位在风扇轴1i上。
显然，上述实施例仅仅是为清楚地说明所作的举例，而并非对实施方式的限定。对于所属领域的普通技术人员来说，在上述说明的基础上还可以做出其它不同形式的变化或变动。这里无需也无法对所有的实施方式予以穷举。而由此所引伸出的显而易见的变化或变动仍处于本申请的保护范围之中。

Claims (10)

  1. 一种收割机风扇结构，其特征在于，包括：
    风扇轴(1i)，其两端分别固定在位于机架上的两个轴承上；
    若干支撑单元，均匀间隔固定在所述风扇轴(1i)上；
    多个扇叶(2i)，固定在所述支撑单元上；
    任一所述支撑单元包括：
    多个扇叶支架(3i)，沿所述风扇轴(1i)的周向顺序栓接固定并锁止在所述风扇轴(1i)上；所述扇叶(2i)分别栓接固定在所述扇叶支架(3i)上；所有所述扇叶支架(3i)围成多边形，且该多边形外切于所述风扇轴(1i)横截面的圆。
  2. 根据权利要求1所述的收割机风扇结构，其特征在于，任一所述支撑单元中的所有所述扇叶支架(3i)围成正多边形。
  3. 根据权利要求2所述的收割机风扇结构，其特征在于，所述扇叶支架(3i)为板状结构。
  4. 根据权利要求3所述的收割机风扇结构，其特征在于，所述扇叶支架(3i)折弯设置形成固定段(32i)和安装段(31i)；所述安装段(31i)的端部适于安装所述扇叶；所述固定段(32i)与所述安装段(31i)之间形成的夹角α与所述扇叶支架(3i)围成的正多边形的内角β互补。
  5. 根据权利要求4所述的收割机风扇结构，其特征在于，其一所述扇叶支架(3i)的固定段(32i)栓接固定在另一所述扇叶支架(3i)的安装段(31i)上。
  6. 根据权利要求1至5中任一项所述的收割机风扇结构，其特征在于，任一所述支撑单元对应的所述风扇轴(1i)上开设一个平口槽(11i)；其一所述扇叶支架(3i)固定在所述平口槽(11i)内。
  7. 根据权利要求6所述的收割机风扇结构，其特征在于，还包括加强板(4i)，焊接固定在所述平口槽(11i)内；所述扇叶支架(3i)固定在所述加强板(4i)的上表面上；所述加强板(4i)的厚度与所述平口槽(11i)的槽深尺寸相同；所述加强板(4i)沿所述风扇轴(1i)径向的宽度不大于所述风扇轴(1i)的直径。
  8. 根据权利要求7所述的收割机风扇结构，其特征在于，在所述风扇轴(1i)的径向方向上，所述加强板(4i)的宽度与所述平口槽(11i)的宽度尺寸相同。
  9. 根据权利要求1至5中任一项所述的收割机风扇结构，其特征在于，所述风扇轴(1i)上开设多个平口槽(11i)；所述平口槽(11i)与所述扇叶支架(3i)一一对应设置；所述扇叶支架(3i)对应固定在所述平口槽(11i)内。
  10. 根据权利要求1至5中任一项所述的收割机风扇结构，其特征在于，所述扇叶(2i)跨接固定在相邻两个所述支撑单元内的两个所述扇叶支架(3i)上。
PCT/CN2021/090089 2020-12-30 2021-04-27 一种收割机风扇结构 WO2022141991A1 (zh)

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