High-stability fan suitable for complex environment

Abstract

The invention provides a high-stability draught fan suitable for a complex environment, and relates to the technical field of draught fans, the high-stability draught fan comprises a draught fan stator, a draught fan rotor, a spring, a spring sleeve, a shell assembly and a bearing; the spring and the fan rotor are arranged in the shell assembly; the fan rotor is arranged in the fan stator, the fan rotor comprises fan blades and a shaft arranged on the central axis of the fan rotor, and the fan blades are fixedly connected to the shaft; the spring is sleeved on the outer diameter of a shaft of the fan rotor, and the spring sleeve is sleeved on the periphery of the spring. The spring sleeve is arranged in the fan to limit the compression amount of the spring and ensure the axial clearance of the fan, so that the structural strength of the fan is improved.

Description

Technical Field

[0001] The invention relates to the technical field of aircraft fans, and in particular to a high-stability fan suitable for complex environments. Background Art

[0002] Air cooling is currently the main heat dissipation method, which has the advantages of easy installation, convenient maintenance, wide practicability, high reliability, and fast thermal response speed. Fans are the most common air cooling heat source and are widely used in various products. However, domestic fan products in fields such as fighter jets started late, and most products still rely on imports. Especially in some complex environments, conventional fan products cannot guarantee long-term stable operation. Summary of the invention

[0003] In view of this, the embodiments of this specification provide a high-stability fan suitable for complex environments, so as to achieve a product that can work stably for a long time in complex environments, and the product structure strength and stability are higher than imported fans, and can replace imported products on an equal footing.

[0004] The embodiments of this specification provide the following technical solutions:

[0005] A high-stability fan suitable for complex environments, comprising:

[0006] Fan stators, fan rotors, springs, spring sleeves, housing assemblies and bearings;

[0007] The bearings, springs and fan rotor are all arranged in the housing assembly;

[0008] The fan rotor is arranged in the fan stator, and the fan rotor comprises a fan blade and a shaft arranged on the central axis of the fan rotor, and the fan blade is fixedly connected to the shaft;

[0009] The spring sleeve is arranged on the outer diameter of the shaft of the fan rotor, the spring sleeve is arranged on the outer periphery of the spring, and the bearing sleeve is arranged on the outer periphery of the spring sleeve.

[0010] Furthermore, the fan rotor further comprises:

[0011] Rotor sleeve and magnets;

[0012] The rotor sleeve is fixedly connected to the bottom of the fan blade, and the rotor sleeve is arranged on the outer diameter of the shaft, and the bottom of the fan blade is fixed to the shaft through the rotor sleeve;

[0013] The magnetic steel is arranged on the inner wall of the rotor sleeve.

[0014] Furthermore, an end head structure is provided at one end of the shaft, the diameter of the end head structure is larger than the diameter of the shaft, and a rotor sleeve groove is provided at one end of the rotor sleeve, and the end head structure is plug-fitted with the rotor sleeve groove.

[0015] Furthermore, the housing assembly comprises:

[0016] a shaft sleeve and a housing, the shaft sleeve being fixed to the housing;

[0017] The shaft sleeve is sleeved on the outer wall of the spring sleeve, and the outer wall of the spring sleeve is connected with the inner wall of the shaft sleeve through clearance fit.

[0018] Further, the shaft sleeve is assembled and fixed into the housing through an insert die-casting process.

[0019] Furthermore, an anti-slip protrusion is provided on the outer diameter of the shaft sleeve, and the shaft sleeve and the housing are fixed by the anti-slip protrusion.

[0020] Furthermore, a plurality of oil groove structures are arranged on the outer wall of the spring sleeve, and grease is smeared in the oil groove structures. When the fan is working, the grease melts and forms an oil film between the outer wall of the spring sleeve and the inner wall of the shaft sleeve.

[0021] Furthermore, the shaft sleeve is processed by a heat treatment process of high temperature quenching and high temperature tempering.

[0022] Furthermore, the matching mode between the bearing and the sleeve is a transition fit.

[0023] Furthermore, the gap corresponding to the transition fit is less than 3 microns.

[0024] Compared with the prior art, the at least one technical solution adopted in the embodiments of this specification can achieve the following beneficial effects:

[0025] The spring sleeve inside the fan limits the compression of the spring while ensuring the axial clearance of the fan, thereby improving the structural strength of the fan. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 is a schematic diagram of the overall structure of a high-stability fan suitable for complex environments according to an embodiment of the present invention;

[0028] Figure 2 is a schematic structural diagram of a fan rotor according to an embodiment of the present invention;

[0029] Figure 3 is a schematic structural diagram of a spring sleeve according to an embodiment of the present invention;

[0030] Figure 4 is a schematic diagram of the position of the spring sleeve in the fan according to an embodiment of the present invention;

[0031] Figure 5 is a schematic structural diagram of a housing assembly according to an embodiment of the present invention;

[0032] Figure 6 is a schematic structural diagram of a housing assembly including an anti-escape protrusion according to an embodiment of the present invention;

[0033] Figure 7 is a schematic structural diagram of a rotor sleeve according to an embodiment of the present invention;

[0034] Figure 8 It is a schematic structural diagram of a shaft according to an embodiment of the present invention.

[0035] The reference numerals in the figure are: 1. fan stator; 2. fan rotor; 201. shaft; 2011. end structure; 202. rotor sleeve; 2021. rotor sleeve groove; 203. fan blade; 204. magnet; 3. housing assembly; 301. shaft sleeve; 3011. anti-escape protrusion; 302. housing; 4. bearing; 5. spring sleeve; 501. oil tank structure; 6. spring. DETAILED DESCRIPTION

[0036] The embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0037] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0038] like Figure 1 As shown, a high-stability fan suitable for complex environments includes: a fan stator 1, a fan rotor 2, a spring 6, a spring sleeve 5, a housing assembly 3 and a bearing 4. The bearing 4, the spring 6 and the fan rotor 2 are all arranged in the housing assembly 3.

[0039] The fan rotor 2 is arranged in the fan stator 1. Figure 2 As shown, the fan rotor 2 includes blades 203 , a shaft 201 arranged on the central axis of the fan rotor 2 , a rotor sleeve 202 and a magnetic steel 204 , and the blades 203 are fixedly connected to the shaft 201 .

[0040] The rotor sleeve 202 is fixedly connected to the bottom of the blade 203, and the rotor sleeve 202 is sleeved on the outer diameter of the shaft 201, and the bottom of the blade 203 is fixed to the shaft 201 through the rotor sleeve 202. The magnetic steel 204 is arranged on the inner wall of the rotor sleeve 202.

[0041] A polishing process is used at the position where the shaft 201 and the bearing cooperate to polish the shaft 201, thereby reducing wear on the bearing during operation, extending the service life, and ensuring the reliability of the fan rotor 2 in various complex environments.

[0042] like Figure 1 and Figure 3 As shown, the spring 6 is sleeved on the outer diameter of the shaft 201 of the fan rotor 2, the spring sleeve 5 is sleeved on the outer periphery of the spring 6, and the bearing 4 is sleeved on the outer periphery of the spring sleeve 5. The spring sleeve 5 is a sleeve made of stainless steel, which is installed inside the sleeve 301. One end cooperates with the spring 6 to wrap the spring 6 inside the spring sleeve 5, and the other end cooperates with the shaft 201 to support the shaft 201. The outer wall of the spring sleeve 5 and the inner hole of the sleeve 301 are matched with a small gap. The sleeve structure with a certain length ensures that it is in a state where the axis is coaxial with the fan shaft in the sleeve 301, which limits the posture and compression of the spring 6, and will not reduce the service life of the spring 6 due to excessive compression. The spring 6 applies elastic force to the bearing 4 through the spring sleeve 5, which provides a suitable preload while ensuring that the bearing 4 is evenly stressed, thereby improving the life and reliability of the fan.

[0043] The spring sleeve 5 is a stainless steel sleeve that limits the compression of the spring 6 and supports the bearing 4 inside the fan. The outer wall of the spring sleeve 5 is designed with an oil groove. Grease is applied inside the oil groove during assembly. Since the spring sleeve 5 and the shaft sleeve are matched with a small gap and are a sleeve structure, the spring 6 can be kept in a normal working position and shape when the fan is working, ensuring the smooth operation of the shaft 201. The oil groove on the outer wall of the spring sleeve 5 can ensure that an oil film exists between the outer wall of the spring sleeve 5 and the inner wall of the shaft sleeve 301, reducing wear and prolonging the life of the fan.

[0044] like Figure 4 As shown, a plurality of oil groove structures 501 are provided on the outer wall of the spring sleeve 5 , and grease is applied in the oil groove structures 501 . When the fan is working, the grease melts to form an oil film between the outer wall of the spring sleeve 5 and the inner wall of the shaft sleeve 301 .

[0045] like Figure 5 As shown, the housing assembly 3 includes:

[0046] The shaft sleeve 301 and the housing 302, the shaft sleeve 301 is fixed to the housing 302. The shaft sleeve 301 is sleeved on the outer wall of the spring sleeve 5, and the outer wall of the spring sleeve 5 is connected with the inner wall of the shaft sleeve 301 by clearance fit. The shaft sleeve 301 is assembled and fixed to the housing 302 by an inlay die-casting process. The shaft sleeve 301 adopts a heat treatment method of high-temperature quenching and high-temperature tempering, has a high structural strength, and can effectively reduce the deformation of the inner hole of the shaft sleeve 301 under the impact of aluminum liquid during inlay die-casting.

[0047] The housing assembly 3 is formed by assembling the housing and the sleeve together by inlay die-casting. The sleeve 301 is made of stainless steel. The stainless steel sleeve 301 has the characteristics of high structural strength and strong environmental resistance, which ensures that the fan can work stably for a long time under various inspection environments while further increasing its structural strength.

[0048] like Figure 6 As shown, the outer diameter of the sleeve 301 is provided with an anti-slip protrusion 3011, and the sleeve 301 and the housing 302 are fixed by the anti-slip protrusion 3011. The anti-slip protrusion 3011 is designed at the joint with the die-cast aluminum to prevent rotation and axial slip-out, and compared with the traditional interference fit method of the sleeve and the housing assembly, its structural strength can be maximized.

[0049] like Figure 7 and Figure 8 As shown, in order to improve the structural strength of the fan rotor 2, an end structure 2011 is provided at one end of the shaft 201, and the diameter of the end structure 2011 is larger than the diameter of the shaft 201. In order to match the end structure 2011 of the shaft 201, a rotor sleeve groove 2021 is provided at one end of the rotor sleeve 202. The end structure 2011 is plugged and matched with the rotor sleeve groove 2021, which plays a limiting role in the axial direction and increases the overall structural strength of the fan rotor 2. During assembly, the small end of the shaft 201 is inserted from the end face of the rotor sleeve 202. The end structure 2011 can not only play a limiting role and ensure that the assembly is in place, but also increase the matching surface and improve the structural strength. In addition, the form of laser welding can further improve the structural strength of the fan rotor 2.

[0050] The matching mode between the bearing 4 and the sleeve 301 is transition matching, and the clearance corresponding to the transition matching is less than 3 microns.

[0051] The shaft sleeve 301 is processed by a heat treatment process of high temperature quenching and high temperature tempering. The bearing 4 at the aluminum cladding of the fan is a fixed bearing. The small deformation can just adjust the matching mode of the bearing 4 and the shaft sleeve 301 to a transition fit here, and the interference or clearance is very small, within 3 microns. Under the premise of ensuring the assembly process, the most suitable installation position is provided for the bearing 4, so that the bearing 4 can run smoothly.

[0052] Beneficial effects of the embodiments of the present invention:

[0053] The shaft of the fan of the embodiment of the present invention adds an end structure. After the shaft and the rotor sleeve are crimped, laser welding is used to reinforce the contact point. Under the action of the end structure and laser welding reinforcement, the strength of the fan rotor is greatly enhanced; the housing assembly consists of a sleeve and a housing, and the sleeve and the housing are fixed together by inlay die casting. The sleeve is the core load-bearing area of ​​the fan. The structural strength is increased by inlay die casting. At the same time, for the sleeve production process, high-temperature tempering is used during heat treatment to ensure that the internal organizational structure changes due to contact with high-temperature aluminum liquid during the die casting process, and appropriate aging treatment after die casting is added to ensure that the high-precision inner hole size can meet the requirements; the spring sleeve plays a role in limiting the compression of the spring inside the fan and ensuring the axial clearance of the fan, which is the key point to improve the structural strength of the fan. At the same time, in order to prevent abnormal wear between the inner wall of the sleeve during operation, an oil storage tank structure is added to the outside of the spring sleeve. Appropriate grease is applied to the oil storage tank during assembly to ensure that there is sufficient grease between the wear parts to ensure the lubrication effect when the fan is working, thereby increasing the life and reliability of the fan.

[0054] The above is only a specific embodiment of the present invention, and cannot be used to limit the scope of the invention. Therefore, the replacement of equivalent components, or equivalent changes and modifications made according to the scope of protection of the patent of the present invention, should still fall within the scope of this patent. In addition, the technical features of the present invention can be freely combined with each other, with each other, and with each other.

Claims

1. A high-stability fan suitable for complex environments, characterized in that: include: A fan stator (1), a fan rotor (2), a spring (6), a spring sleeve (5), a housing assembly (3) and a bearing (4); The bearing (4), the spring (6) and the fan rotor (2) are all arranged in the housing assembly (3); The fan rotor (2) is arranged in the fan stator (1), the fan rotor (2) comprises a fan blade (203) and a shaft (201) arranged on the central axis of the fan rotor (2), and the fan blade (203) is fixedly connected to the shaft (201); The spring (6) is sleeved on the outer diameter of the shaft (201) of the fan rotor (2), the spring sleeve (5) is sleeved on the outer periphery of the spring (6), and the bearing (4) is sleeved on the outer periphery of the spring sleeve (5).

2. The high-stability fan suitable for complex environments according to claim 1 is characterized in that: The fan rotor (2) also includes: A rotor sleeve (202) and a magnetic steel (204); The rotor sleeve (202) is fixedly connected to the bottom of the fan blade (203), and the rotor sleeve (202) is sleeved on the outer diameter of the shaft (201), and the bottom of the fan blade (203) is fixed to the shaft (201) through the rotor sleeve (202); The magnetic steel (204) is arranged on the inner wall of the rotor sleeve (202).

3. The high-stability fan suitable for complex environments according to claim 2 is characterized in that: One end of the shaft (201) is provided with an end structure (2011), the diameter of the end structure (2011) is greater than the diameter of the shaft (201), one end of the rotor sleeve (202) is provided with a rotor sleeve groove (2021), and the end structure (2011) is plug-fitted with the rotor sleeve groove (2021).

4. The high-stability fan suitable for complex environments according to claim 1, characterized in that: The housing assembly (3) comprises: A shaft sleeve (301) and a housing (302), wherein the shaft sleeve (301) is fixed to the housing (302); The shaft sleeve (301) is sleeved on the outer wall of the spring sleeve (5), and the outer wall of the spring sleeve (5) and the inner wall of the shaft sleeve (301) are connected through clearance fit.

5. The high-stability fan suitable for complex environments according to claim 4, characterized in that: The shaft sleeve (301) is assembled and fixed into the housing (302) by an insert die-casting process.

6. The high-stability fan suitable for complex environments according to claim 4, characterized in that: The outer diameter of the shaft sleeve (301) is provided with an anti-slip protrusion (3011), and the shaft sleeve (301) and the housing (302) are fixed by the anti-slip protrusion (3011).

7. The high-stability fan suitable for complex environments according to claim 4, characterized in that: A plurality of oil groove structures (501) are arranged on the outer wall of the spring sleeve (5), and lubricating grease is applied to the oil groove structures (501). When the fan is working, the lubricating grease melts, so that an oil film is formed between the outer wall of the spring sleeve (5) and the inner wall of the shaft sleeve (301).

8. The high-stability blower suitable for complex environments according to claim 4, characterized in that: The shaft sleeve (301) is processed by a heat treatment process of high temperature quenching and high temperature tempering.

9. The high-stability blower suitable for complex environments according to claim 4, characterized in that: The matching mode between the bearing (4) and the shaft sleeve (301) is a transition match.

10. The high-stability blower suitable for complex environments according to claim 9, characterized in that: The gap corresponding to the transition fit is less than 3 microns.

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