CN214533695U - Cross-flow fan blade and wind wheel therein - Google Patents

Abstract

The utility model relates to an air conditioning equipment field especially relates to a through-flow fan blade and wind wheel wherein. The middle impeller comprises a wheel disc and a plurality of blades arranged on the wheel disc along the same circumferential line, wherein the lower end parts of the blades are fixedly connected with the end surface of the wheel disc; the method is characterized in that: the upper disc surface of the wheel disc is circumferentially provided with a plurality of blade grooves for embedding blades, the blade grooves are in an ascending state from the outer side to the inner side, and the lower ends of the blades are low in outer part and high in inner part and are arranged in the blade grooves. Among this technical scheme, the blade groove slope setting on the rim plate inserts the blade in the blade groove, and the blade forms the welding position with the place of blade groove contact, and this welding position also is the slope with the blade groove is the same, and this kind of welding position if shines with the laser slant, can include the dead angle that can't shine before, can make whole connection position fuse together, and intensity improves by a wide margin, the life of extension fan blade.

Description

Cross-flow fan blade and wind wheel therein

Technical Field

The utility model relates to an air conditioning equipment field especially relates to a through-flow fan blade and wind wheel wherein.

Background

The cross-flow fan blade is a special fan, and is one of the important accessories of air conditioner, and is made up by connecting several middle wind wheels, and is generally made into the form of tower column, also has a large-size cylindrical form, and its blown wind can be concentrated so as to form relay type air flow transmission.

An intermediate impeller of the cross-flow fan is also called an impeller, is multi-blade type and long cylindrical, and is provided with forward multi-wing blades. When the impeller rotates, airflow enters the blade grids from the opening position of the impeller, passes through the inside of the impeller and is discharged into the volute from the blade grids on the other side to form working airflow. The flow of the air flow in the impeller is complicated, the speed field of the air flow is unstable, and a vortex is also present in the impeller, the center of which is located near the volute tongue. The existence of the vortex enables the output end of the impeller to generate circulating flow, and outside the vortex, an airflow streamline in the impeller is arc-shaped.

Thus, the flow velocity at each point on the outer circumference of the impeller is non-uniform, with greater velocity nearer the vortex core and less velocity nearer the volute. The air flow velocity and pressure at the fan outlet are not uniform, so the flow coefficient and pressure coefficient of the fan are averages.

The impeller material is generally aluminum alloy or engineering plastic. The aluminum alloy impeller has high strength, light weight and high temperature resistance, and can keep stable operation for a long time without deformation; the plastic impeller is formed by injection molding of a mold and ultrasonic welding, is generally used in occasions with low rotating speed and has larger diameter.

The impeller of the through-flow fan blade comprises a wheel disc and a blade, when the conventional through-flow fan blade is subjected to ultrasonic welding, the lower end of the blade is inserted into a blade groove on the wheel disc, but the disc surface of the wheel disc is flat, ultrasonic waves can only melt the middle upper end of the blade groove and the lower end of the blade, and although the joint is flat after welding, the bottom of the blade groove and the blade are incomplete to be welded to a certain extent, so that the service life of the through-flow fan blade is influenced.

Disclosure of Invention

In order to solve the problems, the utility model aims to provide a medium wind wheel, wherein the blade grooves on the wheel disc are obliquely arranged, the blades are inserted into the blade grooves, and the laser is used for driving the connection part of the blade grooves and the blade grooves from the side surface, so that the whole connection part can be integrated, and the strength is greatly improved; a second object of the present invention is to provide a cross-flow fan blade, which has the above-mentioned middle wind wheel.

In order to achieve the above purpose, the utility model adopts the following technical scheme: the device comprises a wheel disc and a plurality of blades arranged on the wheel disc along the same circumferential line, wherein the lower end parts of the blades are fixedly connected with the end surface of the wheel disc; the method is characterized in that: the upper disc surface of the wheel disc is circumferentially provided with a plurality of blade grooves for embedding blades, the blade grooves are in an ascending state from the outer side to the inner side, and the lower ends of the blades are low in outer part and high in inner part and are arranged in the blade grooves.

Preferably, the disk surface of the disk is in an ascending state from the outer side to the inner side, the joint of the lower end of the blade and the blade groove forms a welding position, and the welding position is in the ascending state from the outer side to the inner side. In the technical scheme, the whole disc surface of the limiting wheel disc is high inside and low outside.

Preferably, the blade is welded and fixed with the blade groove; during welding, laser is emitted from the side surface of the blade groove to the welding position.

Preferably, the upper disc surface of the wheel disc is in an ascending state from the outer side to the inner side, and the lower disc surface of the wheel disc is in a horizontal state. In the technical scheme, the upper disc surface of the limiting wheel disc is inclined, the lower disc surface of the limiting wheel disc is horizontal, and the vane grooves are high inside and low outside in the wheel disc.

Preferably, the upper disc surface and the lower disc surface of the wheel disc are in a horizontal state from the outer side to the inner side, and the longitudinal height of the blade groove is smaller than the thickness of the wheel disc; the outer side depth of the blade groove in the wheel disc is larger than the inner side depth of the blade groove. In the technical scheme, the blade groove is limited, and the blade groove with different heights on two sides and gradually changed middle is dug in the flat wheel disc.

Preferably, the disk surface of the wheel disk is in a plane shape, or a convex curved surface shape or a concave curved surface shape.

Preferably, an oblique angle theta is formed between the upper disc surface of the wheel disc and the horizontal plane, and the oblique angle theta is 5-25 degrees.

Preferably, the number of the blades is 30-39.

A cross-flow fan blade comprises the middle wind wheel, wherein the middle wind wheel is fixed through laser welding between blades and blade grooves.

The utility model adopts the above technical scheme, this technical scheme relates to a well wind wheel to and have this well wind wheel's through-flow fan blade. The blade groove on the wheel disc is obliquely arranged, the blade is inserted into the blade groove, the welding position is formed at the contact position of the blade and the blade groove, the welding position is oblique like the blade groove, the welding position can cover dead angles which cannot be irradiated before if obliquely irradiating by laser, the whole connecting position can be integrated, the strength is greatly improved, and the service life of the fan blade is prolonged.

Drawings

Fig. 1 is a schematic diagram of a structure of two sections of laser welding A-A of a medium wind wheel.

Fig. 2 is a schematic view of a two-segment laser welding A-direction structure of an intermediate air wheel.

Fig. 3 is a schematic view of a two-section laser welding three-dimensional structure of an intermediate air wheel.

Fig. 4 is a schematic diagram of a-a direction structure of a medium wind wheel.

Fig. 5 is a schematic perspective view of a medium wind wheel.

FIG. 6 is a schematic view of an A-A direction structure of ultrasonic welding of a medium wind wheel.

Fig. 7 is a structural diagram of an ultrasonic welding A direction of a medium wind wheel.

Fig. 8 is a schematic view of an ultrasonic welding three-dimensional structure of a medium wind wheel.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise" 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 to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, unless otherwise specified, "a plurality" means two or more unless explicitly defined otherwise.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be 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 according to specific situations by those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Example 1:

as shown in fig. 1-8, the middle impeller comprises a wheel disc 1 and a plurality of blades 2 arranged on the wheel disc 1 along the same circumferential line, wherein the lower end parts of the blades 2 are fixedly connected with the end surface of the wheel disc 1; a plurality of vane grooves 3 for fitting the vanes 2 are circumferentially provided on an upper disc surface 5 of the disk 1, the vane grooves 3 are in an upward state from the outside to the inside, and the lower ends of the vanes 2 are arranged in the vane grooves 3 so as to be low outside and high inside. Among this technical scheme, with the blade groove 3 slope setting on the rim plate 1, insert blade 2 in blade groove 3, the place of blade 2 and the contact of blade groove 3 forms the welding position, and this welding position also is the slope with blade groove 3 is the same, and this kind of welding position if shines with the laser slant, and the angle of incidence 7 can be contained the dead angle that can't shine before, can make whole connection position fuse together, and intensity improves by a wide margin, the life of extension fan blade.

Here, it should be noted that the vane grooves 3 are in a rising state from the outer side to the inner side, and the disk is exhibited in the following three ways:

mode 1: the disk surface of the wheel disk 1 is in an ascending state from the outer side to the inner side, a welding position 4 is formed at the connection part of the lower end of the blade 2 and the blade groove 3, and the welding position 4 is in an ascending state from the outer side to the inner side; during welding, laser light is emitted from the side surface of the blade groove 3 to the welding site 4. In the scheme, the disk surface of the whole wheel disk is high inside and low outside, so the blade grooves are also high inside and low outside.

Mode 2: the upper disc surface 5 of the wheel disc 1 is in a raised state from the outer side to the inner side, and the lower disc surface 6 is in a horizontal state. In the scheme, the disc surface on the wheel disc is provided with a slope with a high inner part and a low outer part, so that the blade grooves can also realize a high inner part and a low outer part.

Mode 3: the upper disc surface 5 and the lower disc surface 6 of the wheel disc 1 are in a horizontal state from the outer side to the inner side, and the longitudinal height of the blade groove 3 is smaller than the thickness of the wheel disc 1; the depth of the outer side of the blade groove 3 in the wheel disc 1 is larger than the depth of the inner side of the blade groove 3. In the scheme, the blade groove is directly dug to form a blade groove with different heights on two sides and a lifting state in the middle, and the oblique arrangement of the blade groove can be realized.

In a further preferred scheme, the disk surface of the wheel disk 1 is in a plane shape or a convex curved surface shape or a concave curved surface shape.

In a further preferable scheme, an oblique angle theta is formed between the upper disc surface 5 of the wheel disc 1 and a horizontal plane, and the oblique angle theta is 5-25 degrees; the number of the blades 2 is 30-39. In the technical scheme, an oblique angle theta is formed between the upper disc surface 5 of the wheel disc 1 and a horizontal plane, and the number of the blades 2 is limited, so that the angle of the laser shot into the welding position is controlled within a preferred implementation range.

Example 2:

a cross-flow fan blade comprises the middle wind wheels in any one of embodiment 1, every two adjacent middle wind wheels are connected with each other, the upper end face of the wheel disc 1 is provided with a blade groove connected with the blades 2, and the blades of the previous middle wind wheel are inserted into the blade grooves of the next middle wind wheel to be subjected to laser welding.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although embodiments of the present invention have been shown and described, it is to be understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that changes, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the principles and spirit of the present invention.

Claims (9)

1. A middle wind wheel comprises a wheel disc (1) and a plurality of blades (2) arranged on the wheel disc (1) along the same circumferential line, wherein the lower end parts of the blades (2) are fixedly connected with the end surface of the wheel disc (1); the method is characterized in that: the upper disc surface (5) of the wheel disc (1) is circumferentially provided with a plurality of blade grooves (3) for embedding the blades (2), the blade grooves (3) are in a lifting state from the outer side to the inner side, and the lower ends of the blades (2) are low in outer part and high in inner part and are arranged in the blade grooves (3).

2. An intermediate wind wheel according to claim 1, wherein: the disc surface of the wheel disc (1) is in an ascending state from the outer side to the inner side, a welding position (4) is formed at the connecting part of the lower end of the blade (2) and the blade groove (3), and the welding position (4) is in an ascending state from the outer side to the inner side.

3. An intermediate wind wheel according to claim 2, wherein: the blade (2) and the blade groove (3) are welded and fixed; during welding, laser is emitted into the welding position (4) from the side surface of the blade groove (3).

4. An intermediate wind wheel according to claim 1, wherein: the upper disc surface (5) of the wheel disc (1) is in an ascending state from the outer side to the inner side, and the lower disc surface (6) is in a horizontal state.

5. An intermediate wind wheel according to claim 1, wherein: the upper disc surface (5) and the lower disc surface (6) of the wheel disc (1) are in a horizontal state from the outer side to the inner side, and the longitudinal height of the blade groove (3) is smaller than the thickness of the wheel disc (1); the outer side depth of the blade groove (3) in the wheel disc (1) is greater than the inner side depth of the blade groove (3).

6. An intermediate wind wheel according to claim 2, wherein: the disc surface of the wheel disc (1) is in a plane shape or a convex curved surface shape or a concave curved surface shape.

7. An intermediate wind wheel according to claim 2, wherein: an oblique angle theta is formed between the upper disc surface (5) of the wheel disc (1) and the horizontal plane, and the oblique angle theta is 5-25 degrees.

8. An intermediate wind wheel according to claim 1, wherein: the number of the blades (2) is 30-39.

9. A cross-flow fan blade is characterized in that: the middle wind wheel comprises the middle wind wheel as set forth in any one of claims 1-8, and the middle wind wheel is fixed between the blades (2) and the blade grooves (3) through laser welding.

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