CN215980099U

CN215980099U - Novel fan impeller wing blade

Info

Publication number: CN215980099U
Application number: CN202121748930.7U
Authority: CN
Inventors: 吕为; 张文俊
Original assignee: Yixing Taiyu Environmental Engineering Equipment Co ltd
Current assignee: Yixing Taiyu Environmental Engineering Equipment Co ltd
Priority date: 2021-07-29
Filing date: 2021-07-29
Publication date: 2022-03-08
Anticipated expiration: 2031-07-29

Abstract

The utility model discloses a novel fan impeller wing-shaped blade, which relates to the field of fan blades and comprises a blade body, wherein the vertical section of the blade body is in the shape of a wing arc line with a round front part and a sharp rear part, the blade body comprises an upper mask and a lower mask, the upper mask and the lower mask are hermetically connected in the length direction, a cavity is formed in the middle, and two ends of the upper mask and the lower mask are open; one or two ribs fixedly connected with the upper and lower masks are arranged in the cavity respectively, the ribs are vertically arranged along the length direction of the blade body, the upper and lower outlines of the vertical section of the ribs are consistent with the airfoil arc of the vertical section of the blade body, and the upper and lower edges of the ribs are completely attached and connected with the inner side surfaces of the upper and lower masks respectively. The wing-shaped blade is a hollow body consisting of the upper and lower covering plates, the inner ribs are added in the cavity, the stability of the structure is enhanced, the blade covering plates are not easy to deform and bulge, the wing-shaped streamline is accurately reflected, the weight of the blade is light, the centrifugal force during working is reduced, and the upper limit of the rotating speed of the impeller is improved.

Description

Novel fan impeller wing blade

Technical Field

The utility model relates to the field of fan blades, in particular to a novel fan impeller wing-shaped blade.

Background

The blades are important capacity-converting components of the wind turbine, and their design and manufacture directly affect the safe operation and energy efficiency of the wind turbine. The blades of the existing centrifugal fan mainly comprise a plate type blade and a wing type blade, the plate type blade is simple to manufacture, the cost is low, and the energy conversion efficiency is low; the airfoil blade has good aerodynamic performance and high energy conversion efficiency, but has a complex structure and high manufacturing cost.

The existing fan impeller wing-shaped blade is generally of a solid wing-shaped blade structure formed by bending a plurality of iron plates with different lengths, then using the bent iron plates as a mask and mutually welding and grinding the iron plates. The pitch arc of airfoil is mainly controlled by polishing, and the airfoil pitch arc work load of obtaining the completion is big, and the airfoil pitch arc is not well controlled, and the yields is lower, and the blade is yielding.

Disclosure of Invention

The utility model aims to provide a novel fan impeller wing-shaped blade.

The airfoil-shaped blade has the innovation points that the airfoil-shaped blade is a hollow body formed by the upper and lower covering plates, the internal ribs are additionally arranged in the hollow cavity, the stability of the structure is enhanced, the blade covering plates are not easy to deform and bulge, the airfoil-shaped streamline is accurately reflected, the weight of the blade is light, the centrifugal force during working is reduced, and the upper limit of the rotating speed of the impeller is improved.

In order to realize the purpose of the utility model, the technical proposal of the utility model is as follows: a novel fan impeller wing-shaped blade comprises a blade body, wherein the vertical section of the blade body is in the shape of a wing arc line with a round front part and a sharp rear part, the blade body comprises an upper mask and a lower mask, the upper mask and the lower mask are hermetically connected in the length direction, a cavity is formed in the middle, and two ends of the cavity are open; one or two ribs fixedly connected with the upper and lower masks are arranged in the cavity respectively, the ribs are vertically arranged along the length direction of the blade body, the upper and lower outlines of the vertical section of each rib are consistent with the airfoil arc of the vertical section of the blade body, and the upper and lower edges of each rib are completely attached and connected with the inner side surfaces of the upper and lower masks respectively. The wing-shaped blade is a hollow body consisting of the upper and lower covering plates, the inner ribs are added in the cavity, the stability of the structure is enhanced, the blade covering plates are not easy to deform and bulge, the wing-shaped streamline is accurately reflected, the weight of the blade is light, the centrifugal force during working is reduced, and the upper limit of the rotating speed of the impeller is improved.

Furthermore, the ribs are connected with the upper and lower skin plates in a welding manner, and the upper skin plate is connected with the lower skin plate in a welding manner. When the rib is assembled, the rib and the upper mask plate are fixed and clamped according to the designated position, and then the single-side welding is performed by adopting a mode of spot welding firstly and section welding secondly. And then covering the upper and lower covering plates, welding the upper and lower covering plates on a single side in a spot welding-first-section welding mode, welding the upper and lower covering plates, and adopting welding connection, so that the operation is simple, the connection is firm, and the sealing performance is good.

Furthermore, a plurality of clamping grooves for inserting the ribs are formed in the inner side surfaces of the upper and lower covering plates. The ribs are clamped into the clamping grooves, so that the ribs and the upper and lower mask plates are positioned and fixed conveniently.

Furthermore, a plurality of vertically arranged bulges are arranged on the inner wall of the clamping groove, and a plurality of grooves matched with the bulges are arranged on the ribs. When the rib is inserted into the clamping groove, the rib cannot slide along the clamping groove due to the matching of the rib and the concave-convex structure of the clamping groove, and the rib is convenient to weld.

Furthermore, the upper and lower masks are both formed by punching and molding the die. The airfoil camber line formed by stamping is more perfect than that formed by grinding.

The utility model has the beneficial effects that:

1. the inner ribs are added in the cavity of the blade body, so that the structural stability is enhanced, the blade mask is not easy to deform and bulge, an airfoil streamline is accurately reflected, meanwhile, due to the fixing effect of the ribs, the influence of welding thermal deformation is reduced, and the yield of products is improved.

2. The inner side surfaces of the upper and lower mask plates are provided with clamping grooves into which the ribs are inserted, the connecting parts of the clamping grooves and the ribs are in concave-convex matching, and the ribs are fixedly clamped after being inserted, so that the welding is convenient.

Drawings

Fig. 1 is a vertical sectional view of a blade body.

Fig. 2 is a sectional view a-a.

Fig. 3 is a cross-sectional view of the card slot.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

Example 1: as shown in fig. 1, 2 and 3, a novel fan impeller wing-shaped blade comprises a blade body 1, wherein the vertical section of the blade body 1 is in the shape of a wing arc with a round front part and a sharp rear part, the two ends of the blade body 1 in the length direction are open, the blade body 1 comprises an upper mask 1.1 and a lower mask 1.2, the upper mask and the lower mask are both masks formed by die stamping, the blade body 1 comprises an upper mask 1.1 and a lower mask 1.2, the upper mask 1.1 and the lower mask 1.2 are hermetically connected in the length direction, the upper mask 1.1 and the lower mask 1.2 are connected in a welding manner, a cavity 1.5 is formed in the middle, and the two ends are open; be equipped with respectively with upper and lower mask fixed connection's one or two ribs 1.3 in cavity 1.5, rib 1.3 is welded connection with the connection of upper and lower mask, rib 1.3 is laid perpendicularly along 1 length direction of blade body, the upper and lower profile of rib 1.3 vertical cross-section is unanimous with the wing section pitch arc of blade body 1 vertical cross-section, the upper and lower both sides of rib 1.3 are laminated completely with the medial surface of upper and lower mask respectively and are connected, upper and lower mask medial surface is equipped with a plurality of draw-in grooves 1.4 that are used for inserting the rib, be equipped with a plurality of vertical archs 1.41 of arranging on the draw-in groove 1.4 inner wall, be equipped with a plurality of recesses 1.31 with protruding 1.41 complex on rib 1.3.

During assembly, the upper edge of the rib 1.3 is inserted into the clamping groove 1.4 of the upper mask 1.1, the protrusion 1.41 of the clamping groove 1.4 is matched with the groove 1.31 of the rib 1.3, the rib 1.3 and the clamping groove of the upper mask 1.1 are subjected to single-side welding, the rib 1.3 is inserted into the clamping groove 1.4 of the lower mask 1.2 in a spot welding and section welding mode, the same concave-convex structure is matched, single-side welding is carried out through openings at two ends of the blade body 1, the upper mask and the lower mask are welded to form the blade body 1 with two open ends.

The described embodiments are only some embodiments of the utility model, not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Claims

1. A novel fan impeller wing-shaped blade comprises a blade body, wherein the vertical section of the blade body is in the shape of a wing arc line with a round front part and a sharp rear part, and the novel fan impeller wing-shaped blade is characterized in that the blade body comprises an upper mask and a lower mask which are hermetically connected in the length direction, a cavity is formed in the middle, and two ends of the cavity are open; one or two ribs fixedly connected with the upper and lower masks are arranged in the cavity respectively, the ribs are vertically arranged along the length direction of the blade body, the upper and lower outlines of the vertical section of the ribs are consistent with the airfoil arc of the vertical section of the blade body, and the upper and lower edges of the ribs are completely attached and connected with the inner side surfaces of the upper and lower masks respectively.

2. The new fan wheel airfoil blade of claim 1, wherein the rib is welded to the upper and lower skins and the upper and lower skins are welded.

3. The airfoil blade of a fan impeller as claimed in claim 1, wherein the inner surfaces of the upper and lower shrouds are provided with a plurality of slots for insertion of ribs.

4. The novel fan impeller airfoil blade as claimed in claim 3, wherein a plurality of vertically arranged protrusions are formed on the inner wall of the slot, and a plurality of grooves matched with the protrusions are formed on the rib.

5. The new fan impeller airfoil blade of claim 1, wherein the upper and lower masks are both masks stamped from a die.