High-reliability aviation fan

Abstract

The utility model discloses a high-reliability aviation fan which comprises a machine shell mechanism, a fan blade mechanism is arranged on the inner side of the machine shell mechanism, magnetic steel is arranged on the inner side of the fan blade mechanism, a stator is arranged on the inner side of the magnetic steel, the lower end of the fan blade mechanism is fixedly connected with a blade shaft, and a spring is arranged on the outer side of the blade shaft. And a bearing is fixedly mounted on the outer side of the blade shaft. According to the high-reliability aviation fan, the five blades evenly distributed on the outer side of the blade frame can provide high wind pressure during operation, the surface area of each blade is 276.23 mm < 2 >, enough wind pressure can be provided under the condition of 10000 rpm, the fan blade mechanism is made of YL112 materials, the blade shaft and the fan blade mechanism are integrally formed in a die-casting mode, a plurality of anti-falling grooves and knurls are arranged on the head portion of the blade shaft, and the blade shaft is not prone to falling off. And by means of the double-face dynamic balance mode of the first dynamic balance de-weight holes and the second dynamic balance de-weight holes, de-weight can be conducted on the side edges and the bottom of the blade frame, the dynamic balance performance is guaranteed, and vibration of the draught fan is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to fan related technical field, concretely is a kind of high reliability aviation fan. BACKGROUND

[0002] Fan as a kind of common general machinery, it has wide application in numerous industrial fields and daily life, in aviation field, it is mainly used for the ventilation system, cooling system and air circulation system etc. of aircraft, in ventilation system, fan is responsible for providing fresh air for aircraft cabin and maintaining suitable air pressure, in cooling system, fan removes heat generated in the process of running of key equipment such as engine, electronic equipment etc. by promoting air flow, in air circulation system, fan helps to adjust the flow and flow direction of air, with the continuous development of aviation technology, more and more high requirements are put forward to the reliability, stability, efficiency and light weight of aviation fan.

[0003] The size of existing fan is less 70x70x20mm, and most of them are plastic material, simple structure, low speed, poor vibration resistance, it is difficult to apply to high requirement occasion, at the same time, in the field of aerospace, it works in high altitude environment, air is thin, and the requirement of fan air pressure is higher, most of the fan on the market has high air volume, and it cannot meet the requirement, therefore, a kind of high reliability aviation fan needs to be proposed. INVENTION CONTENTS

[0004] The utility model aims at providing a kind of high reliability aviation fan to solve the problems presented in the above background technology.

[0005] To achieve the above object, the utility model provides the following technical scheme: a kind of high reliability aviation fan, including shell mechanism, the inside of shell mechanism is provided with fan blade mechanism, the inside of fan blade mechanism is provided with magnet steel, the inside of magnet steel is provided with stator, the lower end of fan blade mechanism is fixedly connected with blade shaft, the outside of blade shaft is provided with spring, the outside of blade shaft is fixedly installed with bearing, the bottom of blade shaft is provided with fixed screw;

[0006] The fan blade mechanism includes leaf frame, blade, shaft seat, dynamic balance weight hole one and dynamic balance weight hole two, the outside of leaf frame is fixedly connected with blade, the rear side of leaf frame is fixedly connected with shaft seat, the rear side of leaf frame is provided with dynamic balance weight hole one, the outside of leaf frame is provided with dynamic balance weight hole two.

[0007] Preferably, the shell mechanism includes shell body, lead-out hole, fixed hole, shaft support and middle tube, the outside of shell body is provided with lead-out hole, the front side of shell body is provided with fixed hole, the inside of shell body is fixedly connected with shaft support, the front side of shaft support is fixedly connected with middle tube.

[0008] Preferably, two bearings are arranged on the outer side of the blade shaft, the bearings are arranged on the inner side of the middle tube, and the spring is arranged at the upper end of the bearing.

[0009] Preferably, five blades are fixedly connected to the outer side of the blade frame, the surface area of each blade is 276.23mm 2 .

[0010] Preferably, the shell mechanism is made of 7075 material, and the blade mechanism is made of YL112 material.

[0011] Preferably, the magnetic steel is arranged on the inner side of the blade frame.

[0012] Preferably, the stator is arranged on the outer side of the middle tube.

[0013] Compared with the prior art, the high-reliability aviation fan has the following beneficial effects:

[0014] 1. The high-reliability aviation fan can provide high wind pressure when the five blades arranged on the outer side of the blade frame are in operation, and the surface area of each blade is 276.23mm 2 . The fan can provide sufficient wind pressure at 10000rpm, the blade mechanism is made of YL112 material, the blade shaft and the blade mechanism are integrally pressure-cast, the blade shaft head is provided with a plurality of anti-falling grooves and knurls, the connection strength and reliability are improved, the double-face dynamic balance mode of the dynamic balance weight holes one and two can remove weight from the side edges and the bottom of the blade frame, the dynamic balance performance is ensured, and the vibration of the fan itself is reduced.

[0015] 2. The high-reliability aviation fan has the following beneficial effects: the shell mechanism is integrally processed by using 7075 type aluminum alloy material, the strength is high, the design of the lead hole and the fixing hole facilitates processing, reduces the processing difficulty, the double-bearing support structure of the MR105ZZ type on the outer side of the blade shaft has high structure speed, simple structure, and convenient adjustment, the dynamic load of the bearing of this type is 714N, the static load is 265N, the wind pressure is 260pa at 10000rpm, the bearing load is only 0.91N when the fan is in operation, which is far less than the load capacity of the bearing, and the aviation fan has strong impact resistance and vibration redundancy, the spring between the blade shaft root and the bearing can provide pre-tightening force, the pre-tightening force of the spring is 7N, which is 1% of the rated dynamic load, the form is a constant-pressure pre-tightening mode, the pre-tightening force is constant, is not easily affected by temperature and speed, can effectively eliminate the bearing clearance, keeps the rolling body and the inner and outer rings of the bearing in close contact, and improves the vibration resistance and service life. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a first overall structure schematic view of the utility model;

[0017] Figure 2 It is the second overall structure schematic view of the utility model;

[0018] Figure 3 It is the section structure schematic view of the utility model;

[0019] Figure 4 It is the shell mechanism three-dimensional structure schematic view of the utility model;

[0020] Figure 5 It is the fan blade mechanism top view structure schematic view of the utility model;

[0021] Figure 6 It is the fan blade mechanism three-dimensional structure schematic view of the utility model.

[0022] Wherein: 1, shell mechanism;101, shell body;102, lead-out line hole;103, fixed hole;104, shaft support;105, middle tube;2, fan blade mechanism;201, leaf frame;202, blade;203, shaft seat;204, dynamic balance weight hole one;205, dynamic balance weight hole two;3, magnet steel;4, stator;5, blade shaft;6, spring;7, bearing;8, fixed screw. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0024] Please refer to Figures 1-6 The utility model provides technical scheme: a kind of high reliability aviation fan, including shell mechanism 1, the inside of shell mechanism 1 is provided with fan blade mechanism 2, the inside of fan blade mechanism 2 is provided with magnet steel 3, the inside of magnet steel 3 is provided with stator 4, the lower end of fan blade mechanism 2 is fixedly connected with blade shaft 5, the outside of blade shaft 5 is provided with spring 6, the outside of blade shaft 5 is fixedly installed with bearing 7, the bottom of blade shaft 5 is provided with fixed screw 8, fan blade mechanism 2 includes leaf frame 201, blade 202, shaft seat 203, dynamic balance weight hole one 204 and dynamic balance weight hole two 205, the outside of leaf frame 201 is fixedly connected with blade 202, the rear side of leaf frame 201 is fixedly connected with shaft seat 203, the rear side of leaf frame 201 is provided with dynamic balance weight hole one 204, the outside of leaf frame 201 is provided with dynamic balance weight hole two 205, five blades 202 of the outside of leaf frame 201 can provide higher wind pressure when running, the surface area of each blade is 276.23mm 2, and the fan blade mechanism 2 is made of YL112 material, the blade shaft 5 is integrally pressure cast with the fan blade mechanism 2, the head of the blade shaft 5 is provided with a plurality of anti-falling grooves and knurls, the connection strength and reliability are improved, the double-sided dynamic balance mode of the dynamic balance weight holes one 204 and the dynamic balance weight holes two 205 can remove the weight from the side edges and the bottom of the blade frame 201, the dynamic balance performance is ensured, and the vibration of the fan itself is reduced.

[0025] Please refer to Figures 2-6 In the embodiment, the shell mechanism 1 comprises a shell body 101, a lead-out hole 102, a fixing hole 103, a shaft support 104 and a middle pipe 105, the outer side of the shell body 101 is provided with the lead-out hole 102, the front side of the shell body 101 is provided with the fixing hole 103, the inner side of the shell body 101 is fixedly connected with the shaft support 104, and the front side of the shaft support 104 is fixedly connected with the middle pipe 105. The shell mechanism 1 is integrally processed and formed by adopting 7075 type aluminum alloy material, the strength is high, the lead-out hole 102 and the fixing hole 103 are designed to facilitate processing, the processing difficulty is reduced, two bearings 7 are arranged on the outer side of the blade shaft 5, the bearing 7 is located on the inner side of the middle pipe 105, the spring 6 is located on the upper end of the bearing 7, the double-bearing 7 support structure of the MR105ZZ type outside the blade shaft 5 is designed, the structure rotation speed is high, the structure is simple, the adjustment is convenient, the dynamic load of the bearing 7 is 714N, the static load is 265N, the wind pressure is 260pa when the rotation speed is 10000rpm, the bearing 7 load is only 0.91N when running, which is far less than the load capacity of the bearing 7, and a very strong anti-impact and vibration redundancy is provided. The spring 6 between the root of the blade shaft 5 and the bearing 7 can provide pre-tightening force, the pre-tightening force of the spring is 7N, which is 1% of the rated dynamic load. The form is a constant pressure pre-tightening, the pre-tightening force is constant, is not easily affected by temperature and speed, can effectively eliminate the bearing 7 play, and keeps the rolling body of the bearing 7 and the inner and outer rings of the bearing 7 in close contact, improves the anti-vibration ability and service life, and five leaf blades 202 are fixedly connected to the outer side of the blade frame 201. 2 The shell mechanism 1 is made of 7075 material, the fan blade mechanism 2 is made of YL112 material, the structural strength is high, and the reliability is strong. The magnetic steel 3 is located on the inner side of the blade frame 201, and the stator 4 is located on the outer side of the middle pipe 105.

[0026] Working principle: the fan blade mechanism 2 and the blade shaft 5 are integrally pressure cast, the magnetic steel 3 is pressed in, and then the fan blade mechanism 2 is installed into the shell mechanism 1. The magnetic steel 3 inside the fan blade mechanism 2 is driven by four-pole single-phase to make the fan blade mechanism 2 continuously rotate. Five leaf blades 202 evenly distributed on the outer side of the blade frame 201 can provide high wind pressure when running. The surface area of each leaf blade is 276.23mm 2, and the fan blade mechanism 2 is made of YL112 material, the blade shaft 5 and the fan blade mechanism 2 are integrally pressure cast, the head of the blade shaft 5 is provided with a plurality of anti-falling grooves and knurls, the connection strength and reliability are improved, the double-sided dynamic balance mode of the dynamic balance weight holes 204 and 205 can remove the weight from the side edges and the bottom of the blade frame 201, the dynamic balance performance is ensured, the vibration of the fan itself is reduced, the shell mechanism 1 is integrally processed by adopting 7075 type aluminum alloy material, the strength is high, the design of the lead hole 102 and the fixing hole 103 facilitates processing and reduces processing difficulty, the double-bearing 7 support structure of the MR105ZZ type outside the blade shaft 5 is designed, the structure speed is high, the structure is simple, adjustment is convenient, the dynamic load of the bearing 7 is 714N, the static load is 265N, the wind pressure is 260pa when the speed is 10000rpm, the load of the bearing 7 is only 0.91N when running, which is far less than the load capacity of the bearing 7, and a strong anti-impact and vibration redundancy is provided, the spring 6 between the root of the blade shaft 5 and the bearing 7 can provide pre-tightening force, the pre-tightening force of the spring is 7N, which is 1% of the rated dynamic load, the form is a constant pressure pre-tightening, the pre-tightening force is constant and is not easily affected by temperature and speed, and the bearing 7 play can be effectively eliminated, so that the rolling body of the bearing 7 and the inner and outer rings of the bearing 7 are kept in close contact, the anti-vibration ability and the service life are improved, the new 7020 size fan with the structure design adopts the shell mechanism 1 made of 7075 material and the pressure cast fan blade mechanism 2 made of YL112 material, the blade layout is reasonable, the strength is high, and it is single-phase driven, high-efficiency and energy-saving, the speed is high under the same power, the speed can reach 10000rpm, the wind pressure reaches 260pa, the air volume is 60m 3 / h, and good heat dissipation performance is provided.

[0027] The standard parts used in the utility model can be purchased from the market, the special-shaped parts can be ordered according to the description and the drawings, the specific connection mode of each part adopts the conventional means such as bolts, rivets and welding in the prior art, the machinery, parts and equipment adopt the conventional types in the prior art, the circuit connection adopts the conventional connection mode in the prior art, and details are not described herein.

[0028] The above description of the disclosed embodiments enables those skilled in the art to implement or use the utility model, various modifications of the embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the utility model. Therefore, the utility model will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A high reliability aviation fan comprising a casing mechanism (1), characterized in that: The inner side of the shell mechanism (1) is provided with a fan blade mechanism (2), the inner side of the fan blade mechanism (2) is provided with a magnetic steel (3), the inner side of the magnetic steel (3) is provided with a stator (4), the lower end of the fan blade mechanism (2) is fixedly connected with a blade shaft (5), the outer side of the blade shaft (5) is provided with a spring (6), the outer side of the blade shaft (5) is fixedly installed with a bearing (7), and the bottom of the blade shaft (5) is provided with a fixing screw (8). The fan blade mechanism (2) comprises a leaf frame (201), a blade (202), a shaft seat (203), a dynamic balance weight removal hole one (204) and a dynamic balance weight removal hole two (205), the outer side of the leaf frame (201) is fixedly connected with the blade (202), the rear side of the leaf frame (201) is fixedly connected with the shaft seat (203), the rear side of the leaf frame (201) is provided with the dynamic balance weight removal hole one (204), and the outer side of the leaf frame (201) is provided with the dynamic balance weight removal hole two (205).

2. A high reliability aviation fan as claimed in claim 1, wherein: The shell mechanism (1) comprises a shell body (101), a lead-out hole (102), a fixed hole (103), a shaft support (104) and a middle pipe (105), the outer side of the shell body (101) is provided with the lead-out hole (102), the front side of the shell body (101) is provided with the fixed hole (103), the inner side of the shell body (101) is fixedly connected with the shaft support (104), and the front side of the shaft support (104) is fixedly connected with the middle pipe (105).

3. The high reliability aviation fan of claim 1, wherein: The two bearings (7) are located on the outer side of the blade shaft (5), the bearings (7) are located on the inner side of the middle pipe (105), and the spring (6) is located on the upper end of the bearing (7).

4. The high reliability aviation fan of claim 1, wherein: The five leaf blades (202) are fixedly connected to the outer side of the leaf frame (201), and the surface area of the leaf blade (202) is 276.23mm 2 .

5. The high reliability aviation fan of claim 1, wherein: The shell mechanism (1) is made of 7075 material, and the fan blade mechanism (2) is made of YL112 material.

6. A high reliability aviation fan as claimed in claim 1, wherein: The magnetic steel (3) is located on the inner side of the leaf frame (201).

7. The high reliability aviation fan of claim 1, wherein: The stator (4) is located on the outer side of the middle pipe (105).

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