CN219492710U

CN219492710U - Counterweight structure of fan blade

Info

Publication number: CN219492710U
Application number: CN202320643772.1U
Authority: CN
Inventors: 徐超; 张旭东; 钟燕燕; 卢天健; 王新
Original assignee: Weihai Creditfan Ventilator Co Ltd
Current assignee: Weihai Creditfan Ventilator Co Ltd
Priority date: 2023-03-24
Filing date: 2023-03-24
Publication date: 2023-08-08
Anticipated expiration: 2033-03-24

Abstract

The balance weight structure of the fan blade comprises a balance weight pipe and a balance pad, wherein the balance weight pipe is arranged in the blade, a plurality of first fixing pieces are arranged on the balance weight pipe, the first fixing pieces penetrate through the leeward surface of the blade, the balance weight pipe and the windward surface of the blade to be installed and fixed, a plurality of balance pads are arranged on the first fixing pieces, the balance pads are positioned on the outer side of the windward surface of the blade, and the balance pads are perpendicular to the first fixing pieces; the technical problems that the existing fan blade counterweight structure has the defects of limited counterweight range and the risk of throwing out the counterweight and the counterweight pad due to the structure and the installation position of the existing fan blade counterweight structure are solved, and the novel fan blade counterweight structure can be widely applied to the technical field of axial flow fans.

Description

Counterweight structure of fan blade

Technical Field

The utility model relates to the technical field of axial flow fans, in particular to a balancing weight structure of a fan blade.

Background

In order to meet the requirements of corrosion resistance, high temperature and high humidity resistance and the like, axial flow fans of equipment such as a cooling tower, an evaporative cooler, an air cooler and the like usually adopt impellers formed by glass fiber reinforced plastic blades. At present, the glass fiber reinforced plastic blade is generally manufactured by adopting forming processes such as pultrusion glass fiber reinforced plastic, hand pasting glass fiber reinforced plastic, vacuum pouring glass fiber reinforced plastic and the like, wherein the production efficiency of the pultrusion glass fiber reinforced plastic is higher, and the manufacturing cost is relatively lower, so that the pultrusion glass fiber reinforced plastic blade is generally used. The pultruded glass fiber reinforced plastic blade generally adopts a split structure and mainly comprises a blade, a connector, a plug and the like, and the blade is installed together with the connector and the plug through processing modes such as cutting, corner cutting, drilling and the like after being pultruded, but the weight of the assembled blade is generally greatly different due to the influence of factors such as a pultrusion process, the processing mode, an assembly position and the like, so that the blade with lighter weight needs to be balanced to balance the weight among the blade.

The conventional counterweight balancing mode is to add a counterweight and a counterweight pad on a reinforcing rib at the blade tip (as shown in fig. 1), or add the counterweight and the counterweight pad on a hub when the whole impeller is in static balance after the impeller is assembled, the two modes are generally limited by the installation position, more counterweight pads cannot be added on the counterweight, the counterweight range is limited, and the balancing requirement of the blade with larger unbalance difference is difficult to meet; in addition, when adding more balancing weights on the strengthening rib of blade apex department, there is the risk that the balancing weights and balancing pads throw away when impeller high-speed operation, has the potential safety hazard.

Based on the above situation, the application discloses a fan blade counterweight structure.

Disclosure of Invention

The utility model provides an aim at provides a fan blade counter weight structure, aims at solving current fan blade counter weight structure and exists because of its structure and mounted position's defect to lead to the limited, balancing piece of scope of weight and balancing pad of the range of weight have the technical problem who throws away the risk.

The embodiment of the application provides a fan blade counter weight structure, including the balance weight pipe and balance pad, the balance weight pipe sets up the inside at the blade, be equipped with a plurality of first mounting on the balance weight pipe, first mounting runs through the blade leeward side the balance weight pipe is fixed with the blade windward side installation, set up a plurality of on the first mounting the balance pad, the balance pad is located the outside of blade windward side, the balance pad with first mounting sets up perpendicularly.

In one embodiment, the weight tube is arranged in a blade joint mounting groove in the blade, and the distance between the outermost side of the weight tube and the blade tip is 0-50mm.

In one embodiment, the plurality of first fixing members are symmetrically disposed.

In one embodiment, the first fixing member is further provided with a metal sheet, and the metal sheet is located at the outer side of the balance pad.

In one embodiment, the weight tube is further provided with a plurality of second fixing pieces, the second fixing pieces are perpendicular to the first fixing pieces, the second fixing pieces penetrate through the weight tube, the second fixing pieces are provided with a plurality of balance pads, and the balance pads are located on the outer side of the weight tube.

In one embodiment, the second fixing members are symmetrically disposed.

In one embodiment, the weight tube is a round tube, and the balance pad is a standard balance pad.

The application provides a fan blade counter weight structure, its beneficial effect lies in: the balance mode that the coarse balance of the counterweight tube and the static balance of the balance pad are matched with each other is adopted, so that the balance requirement of a large range of counterweight is realized, the counterweight balance is more accurate and reliable, meanwhile, when a large unbalance difference exists between the blades, the blades can be used on the same impeller, the utilization rate of the blades with the large weight difference is improved, and the production cost is reduced; the first fixing piece penetrates through the leeward side of the blade, the counterweight tube and the windward side of the blade, and the balance pad is arranged in the vertical direction of the blade, so that the risk of throwing out the counterweight tube and the balance pad in the high-speed running process of the impeller is reduced compared with the balance mode that the balance block and the balance pad are arranged in the horizontal direction of the blade in the prior art; the utility model has the advantages of simple and novel structure, wide counterweight adjusting range, high counterweight efficiency, high blade utilization rate and convenient installation and replacement.

Drawings

FIG. 1 is a schematic diagram of a prior art glass fiber reinforced plastic blade counterweight balancing method;

FIG. 2 is a schematic structural view of a fan blade counterweight structure according to an embodiment of the disclosure;

FIG. 3 is an enlarged schematic view of a portion A of a fan blade counterweight structure shown in FIG. 2;

fig. 4 is a schematic structural diagram of a counterweight structure of a fan blade according to another embodiment of the application.

The symbols in the drawings illustrate:

1. a weight tube; 2. a balance pad; 3. a first fixing member; 4. a second fixing member; 5. a blade; 501. blade lee surface; 502. the windward side of the blade; 503. blade joint mounting slots; 504. reinforcing ribs; 6. a metal sheet.

Detailed Description

In order to make the technical problems, technical schemes and beneficial effects to be solved by the present application more clear, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.

It should be noted that, the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "front", "rear", "inner", "outer", "top", "bottom", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and are not to be construed as indicating or implying that the apparatus or element in question must be provided with a specific direction, be configured and operated in a specific direction, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.

Referring to fig. 2, a schematic structural diagram of a counterweight structure for a fan blade according to an embodiment of the disclosure is shown, for convenience of explanation, only the portions related to the embodiment are shown, and the details are as follows:

in one embodiment, please combine fig. 3, a fan blade counterweight structure, including a counterweight pipe 1 and a counterweight pad 2, wherein the counterweight pipe 1 is disposed in the blade 5, the counterweight pipe 1 is provided with a plurality of first fixing members 3, the first fixing members 3 penetrate through the blade leeward surface 501, the counterweight pipe 1 and the blade windward surface 502 for installation and fixation, the first fixing members 3 are provided with a plurality of counterweight pads 2, the counterweight pads 2 are disposed outside the blade windward surface 502, and the counterweight pads 2 are disposed vertically with the first fixing members 3; the balance mode that the weight tube 1 is in rough balance and the balance pad 2 is in static balance is adopted, so that the balance requirement of a large-range weight is met, and the weight balance is more accurate and reliable.

Specifically, the weight tube 1 is disposed in the blade joint mounting groove 503 inside the blade 5, and the size of the weight tube 1 corresponds to the size of the blade joint mounting groove 503, so that the blade joint mounting groove 503 can play a role in fixing the weight tube 1; the distance between the outermost side of the weight tube 1 and the blade tip of the blade 5 is 0-50mm, namely, when weight installation and fixation are carried out, the weight tube 1 is installed in a blade joint installation groove 503 positioned at the blade tip of the blade 5, so that the weight tube 1 can not obstruct the installation of a blade joint and a plug thereon;

the counterweight tube 1 is formed by processing round tubes, when the counterweight is carried out, the counterweight tubes 1 with different lengths are selected according to actual counterweight needs so as to match the counterweight amount required by impeller balance, and the use of the counterweight tube 1 realizes the counterweight balance requirement with a large range so as to ensure that the blades 5 can still be used on the same impeller when large unbalance difference exists; the balance pad 2 adopts standard balance gaskets, and when the balance weight is carried out, the standard balance gaskets with different specifications and numbers are selected according to the actual balance weight requirement so as to achieve the purpose of accurate balance weight;

the first fixing pieces 3 comprise, but are not limited to, fixing bolts, and a plurality of first fixing pieces 3 are symmetrically arranged on the counterweight pipe 1, so that the counterweight pipe 1 is more firmly connected with the blades 5, the situation that the counterweight pipe 1 is thrown out when the impeller runs at a high speed is avoided, and the reliability of a counterweight structure is improved; in addition, through adopting the fixed mode of installation that first mounting 3 runs through blade leeward face 501, balance weight pipe 1 and blade windward face 502, and balanced pad 2 sets up in the vertical direction of blade 5, compares with the balanced mode that the balancing piece and the balanced pad set up in the horizontal direction of blade in prior art, has reduced the risk that the balance weight pipe 1 and the balanced pad 2 are thrown away in the impeller high-speed operation process.

In one embodiment, referring to fig. 3, the first fixing member 3 is further provided with a metal sheet 6, the metal sheet 6 is located at the outer side of the balance pad 2, and the metal sheet 6 is provided to fix the balance pad 2, so as to increase the connection firmness between the balance pad 2 and the first fixing member 3.

In one embodiment, referring to fig. 4, the weight tube 1 is further provided with a plurality of second fixing members 4, the second fixing members 4 are perpendicular to the first fixing members 3, the second fixing members 4 penetrate through the weight tube 1, the plurality of second fixing members 4 are symmetrically arranged, the second fixing members 4 are provided with a plurality of balance pads 2, and the balance pads 2 are located at the outer side of the weight tube 1; when carrying out the counter weight, the balanced pad 2 of preferential first mounting 3 cooperation carries out the counter weight, and when the balanced pad 2 of first mounting 3 cooperation can't satisfy the counter weight demand, the balanced pad 2 of the supplementary counter weight of second mounting 4 cooperation is selected again, realizes the balanced demand of counter weight of great scope, has improved the utilization ratio of the blade 5 that weight has great difference simultaneously, has reduced manufacturing cost.

The working principle of the fan blade counterweight structure is described below with reference to fig. 2-4, as follows:

when the balance weight pipe is used, firstly, a balance weight pipe 1 with a proper length is selected according to actual balance weight requirements, the balance weight pipe 1 is placed in a blade joint mounting groove 503 in a blade 5, the position of the balance weight pipe 1 is adjusted to enable the distance between the outermost side of the balance weight pipe 1 and the blade tip of the blade 5 to be 0-50mm, then a first fixing piece 3 sequentially penetrates through a blade leeward side 501, the balance weight pipe 1 and a blade windward side 502, a balance pad 2 and metal sheets 6 are placed at the tail end of the first fixing piece 3, the specification and the quantity of the balance pad 2 are determined according to the actual balance weight requirements, the balance weight pipe 1 and the balance pad 2 are fixed on the blade 5 through the first fixing pieces 3, and each first fixing piece 3 is well fixed, so that balance weight balance of the blade 5 is realized;

if the balance pad 2 is matched with the first fixing piece 3, the balance pad 2 is still placed at the tail end of the second fixing piece 4 by penetrating through the balance tube 1, the specification and the quantity of the balance pad 2 are determined according to the actual balance weight requirement, the balance pad 2 is fixed on the balance tube 1 through the second fixing piece 4, and each second fixing piece 4 is fixed, so that balance weight of the blade 5 can be realized.

The application provides a fan blade counterweight structure, through adopting the balanced mode that counter weight pipe 1 rough balance and balance pad 2 static balance mutually support, realize the balanced demand of the weight of the counterweight of a relatively large scale, the counterweight balance is more accurate and reliable, still can use on same impeller when realizing that blade 5 has great unbalanced difference simultaneously, improved the utilization ratio of blade 5 that weight has great difference, reduced manufacturing cost; by adopting the mounting and fixing mode that the first fixing piece 3 penetrates through the leeward surface 501 of the blade, the balance weight pipe 1 and the windward surface 502 of the blade, and the balance pad 2 is arranged in the vertical direction of the blade 5, compared with the balance mode that the balance weight and the balance pad are arranged in the horizontal direction of the blade in the prior art, the risk that the balance weight pipe 1 and the balance pad 2 are thrown out in the high-speed running process of the impeller is reduced; the utility model has simple and novel structure, wide weight adjusting range, high weight efficiency, high blade utilization rate, convenient installation and replacement, and can be widely applied to the technical field of axial flow fans.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

The above embodiments are only for illustrating the technical solution of the present application, and are not limiting; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present application, and are intended to be included in the scope of the present application.

Claims

1. The utility model provides a fan blade counter weight structure, includes the counter weight pipe and balance pad, its characterized in that, the counter weight pipe sets up the inside at the blade, be equipped with a plurality of first mounting on the counter weight pipe, first mounting runs through the blade leeward side the counter weight pipe is fixed with the blade windward side installation, set up a plurality of on the first mounting the balance pad, the balance pad is located the outside of blade windward side, the balance pad with first mounting sets up perpendicularly.

2. The fan blade counterweight structure of claim 1, wherein the counterweight tube is disposed in a blade joint mounting groove inside the blade, and the distance between the outermost side of the counterweight tube and the blade tip is 0-50mm.

3. The fan blade counterweight structure of claim 1, wherein a plurality of said first fixtures are symmetrically disposed.

4. The fan blade counterweight structure of claim 1, wherein the first fixing member is further provided with a metal sheet, and the metal sheet is located outside the counterweight pad.

5. The fan blade counterweight structure according to claim 1, wherein the counterweight tube is further provided with a plurality of second fixing members, the second fixing members are perpendicular to the first fixing members, the second fixing members penetrate through the counterweight tube, the second fixing members are provided with a plurality of balance pads, and the balance pads are located on the outer side of the counterweight tube.

6. The fan blade counterweight structure of claim 5, wherein a plurality of said second fixtures are symmetrically disposed.

7. The fan blade counterweight structure of claim 1 or 5, wherein the counterweight tube is a round tube, and the counterweight pad is a standard counterweight pad.