CN212454955U - Anti-tearing connecting structure for blade body and blade root of fan blade - Google Patents
Anti-tearing connecting structure for blade body and blade root of fan blade Download PDFInfo
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- CN212454955U CN212454955U CN201922110696.4U CN201922110696U CN212454955U CN 212454955 U CN212454955 U CN 212454955U CN 201922110696 U CN201922110696 U CN 201922110696U CN 212454955 U CN212454955 U CN 212454955U
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- blade
- working surface
- root
- blade body
- blade root
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Abstract
The utility model discloses a tearing-proof connecting structure of a fan blade body and a blade root, which is characterized in that two clamping grooves are arranged at the central axis of a thin-shell blade body and corresponding to the inner wall of the connecting part of the blade root, the inner concave of the two clamping grooves is completely matched with the diameter of a cylindrical blade root, and the cylindrical blade root is inserted into the two clamping grooves of the thin-shell blade body and is fixed together by more than three bolts and nuts; the blade working surface pressing plate and the blade non-working surface pressing plate are respectively completely matched with the shapes of a section of the working surface and a non-working surface of the root part at the joint of the blade body and the blade root, the two pressing plates are tightly attached to the working surface and the non-working surface of the section of the blade body, and more than two even numbers of other bolts and nuts are pressed and fixed on the blade body at two ends of the cylindrical blade root. The utility model discloses strengthened blade and blade root be connected the steadiness, the stress concentration that appears around blade root and blade body connection position in the operation process of overcoming that can be fine has strengthened the anti tear ability of blade, has prolonged the life of fan.
Description
Technical Field
The utility model relates to a connection structure of fan blade body and blade root.
Background
With the development of national economy, the use of the fan is deepened into various industries, the shape and the material of the main power part blade of the fan are more various, and the pultruded aluminum blade is widely used in the small-diameter axial flow fan due to convenient forming, simple process and light weight.
The blade body of the pultruded aluminum blade is mostly of a thin shell structure, and is pultruded by a mould, so that the pultruded aluminum blade is light in weight and attractive in appearance. The blade body of the pultruded aluminum blade is generally of a thin-shell structure with the thickness of 2-3mm, the blade root made of steel materials is connected with the hub to achieve force transmission, the steel blade root is inserted into the aluminum blade body and is connected with the aluminum blade body through bolts, the connection strength is low, the connection stability is poor, stress concentration occurs around the connection part of the blade root and the blade body in the operation process, and the blade is easily torn in different degrees along with the lengthening of the operation time, so that the service life of the fan is shortened.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the above-mentioned problem that exists among the prior art, provide a joint strength height, the difficult fan blade body that produces the blade tearing phenomenon of connecting portion tears the connection structure with preventing tearing of blade root, and this connection structure has prolonged the life of fan.
In order to achieve the above object, the technical solution of the present invention is: a tearing-proof connecting structure of a blade body and a blade root of a fan blade comprises an aluminum thin-shell blade body, a steel blade root, a blade working surface pressing plate and a blade non-working surface pressing plate; the cylindrical blade root is inserted into the two clamping grooves of the thin-shell blade body and is fixed together by more than three bolts and nuts; the blade working surface pressing plate and the blade non-working surface pressing plate are respectively completely matched with the shapes of a section of the working surface and a non-working surface of the root part at the joint of the blade body and the blade root, the two pressing plates are tightly attached to the working surface and the non-working surface of the section of the blade body, and more than two even numbers of other bolts and nuts are pressed and fixed on the blade body at two ends of the cylindrical blade root.
The blade root of the utility model is clamped and positioned by the two clamping grooves of the thin-shell blade body and is fixed by more than three bolts and nuts, so that the fixing stability is good; particularly, the fixed reinforcing structures of the blade working surface pressing plate and the blade non-working surface pressing plate are additionally arranged at the root part of the blade body, so that the strength of the blade at the position is increased, and the connecting strength of the blade body and the blade root is increased; the structures greatly enhance the connection stability of the blade body and the blade root, can well overcome the stress concentration around the connection part of the blade root and the blade body in the operation process, greatly enhance the tear resistance of the blade, greatly prolong the service life of the fan, and prolong the service life by more than 2 times compared with the traditional connection method adopting bolts and nuts. The utility model discloses simple structure, light in weight, workable.
Drawings
Fig. 1 is a front view of the present invention;
fig. 2 is a cross-sectional view AA of fig. 1.
Detailed Description
The invention is further described with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1 and 2, the present embodiment includes an aluminum thin shell blade body 4, a steel cylindrical blade root 1, a blade face pressure plate 2 and a blade non-face pressure plate 6. Two clamping grooves 41 and 42 which are corresponding to the inner wall of the connecting part of the central axis of the thin-shell blade body 4 and the blade root 1 and are concave and completely matched with the diameter of the blade root 1; the blade root 1 is inserted into the two snap-in grooves 41 and 42 of the thin-shell blade body and is fixed together by three (or four, five, etc.) bolts 5 and nuts 7. The blade working surface pressing plate 2 and the blade non-working surface pressing plate 6 are respectively completely matched with the shapes of a section of the working surface and a non-working surface of the root at the joint of the blade body 4 and the blade root 1, the two working surfaces and the non-working surface are tightly attached to the section of the working surface and the non-working surface of the blade body 4, and the two working surfaces and the non-working surface are fixed on the blade body 4 at two ends of the blade root 1 in a compression joint mode through two (or four or the like) other bolts 3 and nuts 8.
Naturally, the invention also relates to other embodiments, and those skilled in the art can make corresponding changes and modifications according to the invention without departing from the spirit and substance of the invention, and these corresponding changes and modifications should be considered as improvements in the equivalent technology, and fall within the scope of protection of the claims of the invention.
Claims (1)
1. The utility model provides a fan blade and anti-tear connection structure of blade root, its includes aluminium system thin shell blade and steel blade root, its characterized in that: the blade pressing plate comprises a blade working surface pressing plate and a blade non-working surface pressing plate; the cylindrical blade root is inserted into the two clamping grooves of the thin-shell blade body and is fixed together by more than three bolts and nuts; the blade working surface pressing plate and the blade non-working surface pressing plate are respectively completely matched with the shapes of a section of the working surface and a non-working surface of the root part at the joint of the blade body and the blade root, the two pressing plates are tightly attached to the working surface and the non-working surface of the section of the blade body, and more than two even numbers of other bolts and nuts are pressed and fixed on the blade body at two ends of the cylindrical blade root.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922110696.4U CN212454955U (en) | 2019-11-30 | 2019-11-30 | Anti-tearing connecting structure for blade body and blade root of fan blade |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922110696.4U CN212454955U (en) | 2019-11-30 | 2019-11-30 | Anti-tearing connecting structure for blade body and blade root of fan blade |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212454955U true CN212454955U (en) | 2021-02-02 |
Family
ID=74480093
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922110696.4U Active CN212454955U (en) | 2019-11-30 | 2019-11-30 | Anti-tearing connecting structure for blade body and blade root of fan blade |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212454955U (en) |
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2019
- 2019-11-30 CN CN201922110696.4U patent/CN212454955U/en active Active
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