Novel fan blade assembly structure of HVLS large fan

Abstract

The utility model discloses a novel fan blade assembly structure of an HVLS large fan, which comprises a motor component and a plurality of fan blades, and a connecting structure between the motor component and the fan blades is composed of a connecting straight plate which has no angle torsion and has no convex structure on the surface; the bottom side face of the end of the connecting straight plate is tightly attached to the top face of an upper end cover of the motor component, and the fan blade is provided with a left cavity, a middle cavity and a right cavity. The end part of the connecting straight plate is inserted into the middle cavity of the fan blade, and the width of the middle cavity is consistent with that of the connecting straight plate. The connecting straight plate which is produced at low cost is adopted as a connecting structure between the motor and the fan blades, and the connecting straight plate is arranged on the upper end cover of the motor instead of a hanging connection mode, so that vibration generated when the fan rotates is effectively reduced, the flow guide requirement of the fan blades is met by increasing the angle of the flow guide side of the fan blades, and the service life of the fan is prolonged. Under the condition that the flow guide angle and the blowing effect of the fan blades are guaranteed, the assembly structure of the fan blades is simplified, production cost is reduced, and production efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to HVLS large -scale fan technical field especially a new fan blade assembly structure of HVLS large -scale fan. BACKGROUND

[0002] HVLS large -scale fan is widely used in higher space as space ventilation a kind of industrial equipment, for industrial plant, logistics warehouse, waiting room, exhibition hall, gymnasium, supermarket and so on tall space, as space ventilation and personnel cooling preferred solution, industrial fan can push a large amount of airflow to ground, form airflow layer horizontal motion of certain height on ground, thereby promote overall air circulation, such benefit is in all -round ground coverage and air three -dimensional circulation, adopt aerodynamics principle and streamline fan blade, produce super large area natural breeze system, play the dual function of ventilation and cooling, compared with traditional heating ventilation air conditioning and small -size high -speed fan, it has incomparable application advantage.

[0003] In the existing HVLS fan blade assembly, by adopting the bottom disc of one-piece forming and the mounting position for fan blade connection extending around the bottom disc, such as the patent CN202221726440.1 of the applicant discloses a commercial HVLS large fan, including the bottom disc connected with the motor component output shaft and the fan blade assembled on the bottom disc, the production cost of this kind of bottom disc is too high, because of the material of the whole area in the middle of the bottom disc and the large mold required for one-piece die casting forming due to the large size, resulting in high production cost. And this kind of bottom disc is generally set under the motor in the form of hanging connection, which is more vibrating than the one set above the motor during rotation.

[0004] There are also some existing technologies that use single-plate connecting plates to connect the motor and the fan blades, but the single-plate connecting plates need to be twisted to meet the flow guiding requirements of the fan blades, which makes the fan blades tilt at an angle after installation. This kind of connecting plate design is complex and costly. INVENTION CONTENTS

[0005] To solve one or more of the above problems, the utility model provides a new fan blade assembly structure of HVLS large -scale fan, by using low -cost production connecting straight plate as the connecting structure between motor and fan blade, and connecting straight plate is set on the upper end cover of motor instead of hanging connection form, effectively reduce the vibration generated by fan during rotation, increase the angle of flow guiding side of fan blade to meet the flow guiding requirements of fan blade, ensure the flow guiding angle and blowing effect of fan blade, simplify the assembly structure of fan blade, reduce production cost, improve production efficiency.

[0006] To achieve the above object, the utility model selects the following technical scheme: A novel fan blade assembly structure of HVLS large fan, including motor parts and a plurality of fan blades, the connecting structure between the motor parts and the fan blade is composed of connecting straight plate without angle twist and without convex structure on the surface;

[0007] The end bottom side of the connecting straight plate is close to the top surface of the motor part and is locked by the bolt piece, the fan blade has left, middle and right three cavities, and the three cavities are separated by the first reinforcing rib extending from the cavity top surface to the cavity bottom surface.

[0008] The end of the connecting straight plate is inserted into the middle cavity of the fan blade and is installed, and the width of the middle cavity is consistent with the width of the connecting straight plate, the bottom side of the connecting straight plate is close to the bottom surface of the middle cavity, the top surface of the middle cavity is provided with the second reinforcing rib and the second reinforcing rib abuts against the top side of the connecting straight plate.

[0009] As a further improvement of the utility model, it further includes a connecting ring, the connecting ring is arranged on the top surface of the plurality of fan blades and is locked by the bolt piece locked on the fan blade and the connecting straight plate, the outer top surface of the fan blade corresponding to the position of the middle cavity is provided with a flat surface to make the flat surface close to the bottom surface of the connecting ring, and the flat surface extends from the fan wing end to the fan tail end.

[0010] As a further improvement of the utility model, the left and right sides of the fan blade are windward side and guide side respectively, the upper part of the windward side is bent downward with the first arc shape from the flat surface of the outer top surface of the middle cavity, the lower part is bent upward with the second arc shape from the position of the first reinforcing rib on the left side of the middle cavity, and the horizontal plane at the closed end of the upper and lower parts is located between the outer top surface and the outer bottom surface of the middle cavity.

[0011] As a further improvement of the utility model, the upper part of the guide side is bent downward with the third arc shape from the flat surface of the outer top surface of the middle cavity, the lower part is bent downward with the fourth arc shape from the position of the first reinforcing rib on the right side of the middle cavity, and the horizontal plane at the closed end of the upper and lower parts is below the bottom surface of the middle cavity.

[0012] As a further improvement of the utility model, the height H from the closed end to the flat surface of the guide side is 2.5-3.2 times of the height h from the outer bottom surface of the middle cavity to the flat surface.

[0013] As a further improvement of the utility model, the width W1 from the flat surface boundary to the closed end of the windward side is within 1 / 3 of the width W2 from the flat surface boundary to the closed end of the guide side.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] The utility model discloses a low -cost production's connecting straight board is used as the connecting structure between motor and fan blade, and the connecting straight board is arranged on the upper end cover of motor and is not in the form of hanging, effectively reduce the vibration that fan produces when rotating, through the angle of the flow guide side of fan blade to meet the flow guide demand of fan blade, guarantee the flow guide angle and the blowing effect situation of fan blade, simplify the assembly structure of fan blade, reduce production cost, improve production efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to make the technical solutions clearer, the following will briefly introduce the drawings needed to be used in the embodiments. Obviously, the drawings in the following description are only some embodiments of the utility model, and all other embodiments obtained by those skilled in the art without creative labor under the premise of the drawings.

[0017] Figure 1 It is the structural schematic diagram of the embodiment of the utility model.

[0018] Figure 2 It is the structural schematic diagram of the connecting straight board of the embodiment of the utility model.

[0019] Figure 3 It is the structural schematic diagram of the fan blade end part section of the embodiment of the utility model. DETAILED DESCRIPTION

[0020] In order to make the technical solutions clearer, the following will briefly introduce the drawings needed to be used in the embodiments. Obviously, the drawings in the following description are only some embodiments of the utility model, and all other embodiments obtained by those skilled in the art without creative labor under the premise of the drawings.

[0021] It should be understood that when used in the specification and the appended claims, the terms "comprise" and "include" indicate the presence of described features, integers, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof.

[0022] It should also be understood that the terms used in the specification of the utility model are only for the purpose of describing specific embodiments and are not intended to limit the utility model. As used in the specification and the appended claims of the utility model, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include the plural forms.

[0023] It should be further understood that the term "and / or", used in the description and in the claims of the utility model, means any combination of one or more of the associated listed terms and all possible combinations, and includes these combinations.

[0024] The embodiment of the utility model provides a new fan blade assembly structure of HVLS large fan, as shown in Figure 1 And Figure 2 As shown, including motor part 100 and a plurality of fan blades 200, the connecting structure between motor part 100 and fan blade 200 is composed of connecting straight plate 300 without angle twist and protruding structure on surface, the embodiment eliminates the whole big chassis form in traditional scheme, adopts single connecting straight plate form, on the one hand, can reduce production cost, the connecting straight plate of cuboid form, the surface of whole plate body does not need other protruding structure (such as changing the one side inclination of fan blade and setting or protruding inclined block, or one end flat and motor connection and the other end need twist a certain angle and make fan blade side swing), just drill hole in corresponding assembly position, whether from material, preparation process greatly simplifies, effectively reduces cost;

[0025] Further, the end bottom side of connecting straight plate 300 is close to the top surface of the upper end cover 110 of motor part and is locked by bolt, that is, the connecting straight plate is arranged above the motor, and the vibration generated by the motor when driving the fan blade to rotate is smaller than the vibration generated by the fan blade in the form of hanging connection, so that the vibration of the fan during operation is reduced, and the stability of the fan is improved.

[0026] Further, in combination with Figure 3 The fan blade has left, middle and right cavities, and the three cavities are separated by first reinforcing ribs 210 extending from the top surface of the cavity to the bottom surface of the cavity, the end of the connecting straight plate is inserted into the middle cavity 220 of the fan blade for installation, the width of the middle cavity 220 is consistent with the width of the connecting straight plate, the bottom side of the connecting straight plate is attached to the bottom surface of the middle cavity, and the top surface of the middle cavity 220 is provided with second reinforcing ribs 230 which abut against the top side of the connecting straight plate.

[0027] That is, the side surface and the bottom surface of the connecting straight plate are attached to the inner wall of the middle cavity, and the top surface of the connecting straight plate is abutted by the second reinforcing ribs, so that the connection between the connecting straight plate and the fan blade is more stable.

[0028] In order to improve the stability of the fan blades, the assembly structure further comprises a connecting ring 400 arranged on the top surface of the plurality of fan blades 200 and locked by bolt members 300 locked on the fan blades 200 and the connecting straight plate, the outer top surface of the fan blades 200 corresponding to the position of the middle cavity is provided with a flat surface 240 so that the flat surface 240 is attached to the bottom surface of the connecting ring 400, and the flat surface extends from the fan wing end of the fan blade to the fan tail end. The connecting ring can be an integral whole ring, or it can be connected and closed by a plurality of arc-shaped pieces to form a connecting ring. The connecting ring can improve the overall stability between the plurality of fan blades.

[0029] In an optional embodiment, the left and right sides of the fan blade are respectively the windward side 250 and the flow guide side 260, the upper part of the windward side 250 is bent downward by a first arc shape from the flat surface 240 of the outer top surface of the middle cavity 220, and the lower part is bent upward by a second arc shape from the position of the first reinforcing rib on the left side of the middle cavity 220, and the horizontal plane at the closed end of the upper and lower parts is located between the outer top surface and the outer bottom surface of the middle cavity.

[0030] Optionally, the upper part of the flow guide side 260 is bent downward by a third arc shape from the flat surface 240 of the outer top surface of the middle cavity 220, and the lower part is bent downward by a fourth arc shape from the position of the first reinforcing rib on the right side of the middle cavity 220, and the horizontal plane at the closed end of the upper and lower parts is below the bottom surface of the middle cavity 220.

[0031] In this embodiment, the connection between the motor and the fan blade is achieved by using a connecting straight plate, and by transferring the angle of the connecting plate in the traditional scheme to the flow guide angle of the fan blade, the angle of the fan blade is increased, so that a connecting straight plate with lower cost and better manufacturing is used, and the performance of the fan is ensured to realize cost reduction and efficiency increase.

[0032] In some embodiments, the height H from the closed end to the flat surface of the flow guide side is 2.5-3.2 times the height h from the outer bottom surface of the middle cavity to the flat surface.

[0033] In some embodiments, the width W1 of the windward side from the flat surface boundary to the closed end is within 1 / 3 of the width W2 of the flow guide side from the flat surface boundary to the closed end.

[0034] It should be noted that the arcs on the windward and guide sides of the fan blades are not uniform arcs. From the end closure to the middle, they are formed by the tangency of multiple arcs with different arcs. That is, the first, second, third, and fourth arcs are formed by connecting several arcs with different arcs. As long as the transition between adjacent arcs is smooth, this embodiment does not impose any restrictions on the specific arc parameters. As long as the height and / or width of the end closure of the windward and guide sides relative to the straight plane is defined in this embodiment, it is acceptable. That is, by using a connecting straight plate instead of the traditional design that requires adding an angle to the connecting plate, and adding an angle on the fan blade, the cost of the connection structure between the motor components and the fan blade can be reduced and the connection structure simplified during manufacturing. At the same time, since the fan blade is integrally formed, changing the guide angle and other parameters of the fan blade will not have a significant impact on the manufacturing process and cost of the integrally formed fan blade.

[0035] This embodiment uses a low-cost connecting plate as the connection structure between the motor and the fan blades. The connecting plate is set on the upper end cover of the motor instead of being suspended, which effectively reduces the vibration generated by the fan when it rotates. The airflow requirements of the fan blades are met by increasing the angle on the airflow guiding side. While ensuring the airflow guiding angle and blowing effect of the fan blades, the assembly structure of the fan blades is simplified, production costs are reduced, and production efficiency is improved.

[0036] The above disclosure is only one or more preferred embodiments of the present utility model, used to help understand the inventive concept of the technical solution, and is not intended to limit the present utility model in any other way. Any other equivalent or conventional substitution schemes made by those skilled in the art based on the features defined by the present utility model shall still fall within the scope of the present utility model.

Claims

1. A new fan blade assembly structure of a HVLS large fan, comprising a motor part and a plurality of fan blades, characterized in that, The connecting structure between the motor component and the fan blade is composed of a connecting straight plate without angular torsion and protruding structure on the surface; The end bottom side of the connecting straight plate is close to the top surface of the upper end cover of the motor component and is locked by a bolt, the fan blade has three cavities, and the three cavities are separated by a first reinforcing rib extending from the top surface of the cavity to the bottom surface of the cavity; The end of the connecting straight plate is inserted into the middle cavity of the fan blade, the width of the middle cavity is consistent with the width of the connecting straight plate, the bottom side of the connecting straight plate is close to the bottom surface of the middle cavity, the top surface of the middle cavity is provided with a second reinforcing rib and the second reinforcing rib abuts against the top side of the connecting straight plate.

2. A new fan blade assembly structure for a HVLS large fan as claimed in claim 1, wherein A connecting ring is further included, the connecting ring is arranged on the top surface of the plurality of fan blades and is locked by the bolt locked on the fan blade and the connecting straight plate, the outer top surface of the fan blade corresponding to the position of the middle cavity is provided with a flat surface to make the flat surface close to the bottom surface of the connecting ring, and the flat surface extends from the fan wing end to the fan tail end of the fan blade.

3. A new fan blade assembly structure for a HVLS large fan as claimed in claim 2, wherein The left and right sides of the fan blade are the windward side and the guide side respectively, the upper part of the windward side starts from the flat surface of the outer top surface of the middle cavity and bends downward with a first arc, the lower part starts from the position of the first reinforcing rib on the left side of the middle cavity and bends upward with a second arc, and the horizontal plane at the closed end of the upper and lower parts is located between the outer top surface and the outer bottom surface of the middle cavity.

4. A new fan blade assembly structure for a HVLS large fan as claimed in claim 3, wherein, The upper part of the guide side starts from the flat surface of the outer top surface of the middle cavity and bends downward with a third arc, the lower part starts from the position of the first reinforcing rib on the right side of the middle cavity and bends downward with a fourth arc, and the horizontal plane at the closed end of the upper and lower parts is located below the bottom surface of the middle cavity.

5. A new fan blade assembly structure for a HVLS large fan as claimed in claim 4, wherein, The height H from the closed end to the flat surface of the guide side is 2.5-3.2 times the height h from the outer bottom surface of the middle cavity to the flat surface.

6. A new fan blade assembly structure for a HVLS large fan as claimed in claim 4, wherein, The width W1 of the windward side from the flat surface boundary to the closed end is within 1 / 3 of the width W2 of the guide side from the flat surface boundary to the closed end.

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