Magnetic suspension fan impeller with sealing device

Abstract

The magnetic suspension fan impeller with the sealing device comprises an installation disc and a magnetic bearing, a stepped hole is formed in the center of the installation disc, a hollow part of the magnetic bearing is embedded into a protrusion of an annular stepped sleeve and then placed in the stepped hole, and the installation disc is fixedly connected with an outer static part of the magnetic bearing. An annular liquid storage pool is arranged in the wide lower portion of the annular stepped sleeve, a plurality of vertical oil channels communicated with the liquid storage pool are formed in the upper protruding portion of the annular stepped sleeve, a shaft hole matched with the rotating shaft is formed in the middle of the annular stepped sleeve, and the rotating shaft drives the annular stepped sleeve and the rotor portion of the magnetic bearing to rotate. And the annular stepped sleeve is also provided with a drain hole communicated with the liquid storage tank and the shaft hole. The multi-stage blade sealing device is simple in structure, convenient to use and capable of achieving multi-stage blade sealing, is used for sealing fan blades and the rear wall of a fan shell, can effectively guarantee the sealing performance of the blades and the shell, further guarantees effective operation of a fan, and is suitable for blades with different diameters.

Description

TECHNICAL FIELD

[0001] The utility model relates to fan blade sealing technical field, concretely relates to a magnetic suspension fan impeller with sealing device. BACKGROUND

[0002] The existing magnetic suspension fan blade is installed on a fan rotor, and the rotor is fixed on a mounting disc through a magnetic bearing seat. This structure is stable, but difficult to disassemble, which makes maintenance difficult. The traditional blade sealing structure is to install a sealing ring on the bearing seat near the edge of the blade to ensure the sealing. This sealing form prevents gas leakage to some extent and improves the working efficiency of the blade. However, it cannot provide complete sealing, and a certain degree of gas leakage may occur when the blade rotates at high speed, thereby reducing the use efficiency. The traditional bearing seat sealing structure and the bearing seat itself are connected as a whole, that is, the sealing ring cannot be disassembled from the bearing seat, which makes the structure only suitable for installing one blade, which is inconvenient to use and reduces the use efficiency.

[0003] In the prior art, there are also similar magnetic suspension blower impeller sealing devices. For example, a Chinese patent with publication number CN215860944U discloses a magnetic suspension blower impeller sealing device, which realizes sealing of different diameter impellers by setting an axial bearing seat and multiple sealing rings, and has simple structure and is easy to maintain.

[0004] However, its sealing effect is still limited, especially in the case of high-speed rotation, the gas leakage problem still exists. Another Chinese patent with publication number CN220378531U discloses a magnetic suspension blower impeller sealing device, which realizes effective impeller sealing by setting a motor disc and a V-shaped ring type groove, and improves the internal lubrication effect through a rotating groove and a liquid storage groove. However, this device still has deficiencies in complexity and maintenance cost. UTILITY MODEL CONTENTS

[0005] In view of the above technical deficiencies, the purpose of the utility model is to provide a magnetic suspension fan blade and its sealing device, which has simple structure, is convenient to use, can realize multi-stage sealing of blades, and is used for sealing the fan blade and the rear wall of the fan shell, which can effectively ensure the sealing of the blade and the shell, thereby ensuring the effective operation of the fan, and is suitable for blades of different diameters.

[0006] To solve the above technical problems, the utility model adopts the following technical scheme:

[0007] The utility model provides a kind of magnetic suspension fan impeller with sealing device, including mounting disc and magnetic bearing, the center part of mounting disc is equipped with stepped hole, the hollow part of magnetic bearing is embedded and fixed annular stepped sleeve's protruding is placed in the stepped hole adapted thereto, the outer static part of mounting disc and magnetic bearing is fixedly connected, the middle rotor of magnetic bearing is used to fixedly install fan blade, the wide lower part of annular stepped sleeve is equipped with annular liquid pool, the upper protruding part of annular stepped sleeve is equipped with several vertical and the oil channel of communicating liquid pool, the middle part of annular stepped sleeve is opened with the shaft hole adapted to rotating shaft, rotating shaft drives annular stepped sleeve and the rotor part rotation of magnetic bearing, annular stepped sleeve is also opened with the drain hole of communicating liquid pool and shaft hole.

[0008] Preferably, the end surface of the mounting disc is fixedly connected with an annular seal, which presses the outer static part of the magnetic bearing to fix it in the stepped hole.

[0009] Preferably, the annular seal is fixed on the mounting disc by a plurality of bolts arranged in a ring array.

[0010] Preferably, the drain hole is annularly arranged on the inner wall of the shaft hole.

[0011] Preferably, the liquid pool is filled with an adsorbing sponge.

[0012] The utility model has the advantages of:

[0013] 1. The mounting disc seals the edges of the fan blades, the annular seal provides additional sealing between the mounting disc and the magnetic bearing, and the annular stepped sleeve provides additional sealing for the magnetic bearing, thereby forming a certain pressure to prevent gas leakage, reducing gas leakage on the entire fan back surface, improving the efficiency of the seal, ensuring the effective operation of the blades, and improving the efficiency of the fan.

[0014] 2. The annular stepped sleeve is a detachable mounting assembly, which can be easily assembled and installed, simplifying the inspection and maintenance of the sealing element, improving the use efficiency, and allowing the manufacture of sealing discs and annular stepped sleeves of different sizes according to different rotor diameters and blade requirements, thereby expanding the application range and improving the use efficiency.

[0015] 3. The fan back wall is effectively sealed, improving the sealing efficiency of the blades and the fan housing, and compared with existing equipment, avoiding damage to existing sealing devices due to long-term use.

[0016] 4. Compared with the prior art, the fan back wall annular stepped sleeve improves the sealing efficiency of the equipment, and the use of adsorbing sponge and drain hole increases internal lubrication, improving the use efficiency of the equipment. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings described below are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0018] Fig. 1 The structure of the magnetic suspension fan impeller with a sealing device provided by the present application

[0019] Schematic view

[0020] Fig. 2 The schematic view of the structure of the mounting disc

[0021] Fig. 3 The schematic view of the installation of the magnetic bearing and the stepped hole

[0022] Fig. 4 The schematic view of the structure of the annular stepped sleeve

[0023] Explanation of the reference signs

[0024] 1, mounting disc; 2, stepped hole; 4, annular stepped sleeve; 41, oil channel; 42, drain hole; 5, magnetic bearing; 6, annular seal; 7, bolt hole; 8, liquid storage pool DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0026] As Figs. 1 to 4As shown, a magnetic suspension fan impeller with sealing device comprises a mounting disc 1 and a magnetic bearing 5, the central part of the mounting disc 1 is provided with a stepped hole 2, the hollow part of the magnetic bearing 5 is placed in the stepped hole 2 by embedding the convex back of an annular stepped sleeve 4, the outer static part of the mounting disc 1 is fixedly connected with the magnetic bearing 5, the middle rotor of the magnetic bearing 5 is used for fixing the fan blades, the wide lower part of the annular stepped sleeve 4 is provided with an annular liquid pool 8, the upper convex part of the annular stepped sleeve 4 is provided with a plurality of vertical oil channels 41 which are communicated with the liquid pool 8, the middle part of the annular stepped sleeve 4 is provided with a shaft hole which is matched with the rotating shaft, the rotating shaft drives the rotation of the annular stepped sleeve 4 and the rotor part of the magnetic bearing 5, and the annular stepped sleeve 4 is further provided with a drain hole 42 which is communicated with the liquid pool 8 and the shaft hole.

[0027] The end surface of the mounting disc 1 is fixedly connected with an annular seal 6, the annular seal 6 is pressed against the outer static part of the magnetic bearing 5 to fix it in the stepped hole 2.

[0028] The annular seal 6 is fixed on the mounting disc 1 by a plurality of bolts which are arranged in an annular array, and the annular seal 6 is provided with matched bolt holes 7.

[0029] The drain hole 42 is annularly arranged on the inner wall of the shaft hole.

[0030] The liquid pool 8 is filled with adsorptive sponge.

[0031] Working principle: first, the mounting disc 1 is installed, the motor of the fan drives the rotation of the annular stepped sleeve 4 and the rotor of the magnetic bearing 5 through the rotating shaft, and then the fan blades are started to rotate, so that the external air is sucked into the volute and discharged through the air duct on the volute. In addition, due to the layered structure of the annular stepped sleeve 4, the sealing between the fixed part and the movable part of the magnetic bearing 5 is further improved, and the damage of the rotor is prevented during the operation of the equipment.

[0032] When the rotor rotates, the adsorptive sponge inside the annular stepped sleeve 4 rotates together, which makes the adsorptive sponge rotate under the action of centrifugal force and discharge oil through the drain hole 42, thereby improving the lubricating effect. In the upper part of the annular stepped sleeve 4, the oil channel 41 is opened near the outer edge, which can be used for adding oil or collecting the liquid condensed behind the blades during the operation of the fan. The drain hole 42 and the oil channel 41 are distributed on both sides of the annular stepped sleeve 4.

[0033] Obviously, those skilled in the art can make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application also intends to include these modifications and variations.

Claims

1. A magnetic levitation fan impeller with a sealing device, characterized in that: The assembly includes a mounting plate (1) and a magnetic bearing (5). The central part of the mounting plate (1) is provided with a stepped hole (2). The hollow part of the magnetic bearing (5) is embedded in the protrusion of the fixed annular stepped sleeve (4) and placed in the stepped hole (2) that matches it. The mounting plate (1) is fixedly connected to the outer static part of the magnetic bearing (5). The middle rotor of the magnetic bearing (5) is used to fix and install fan blades. The lower wide part of the annular stepped sleeve (4) is provided with an annular liquid storage tank (8). The upper protrusion of the annular stepped sleeve (4) is provided with several vertical oil passages (41) that connect to the liquid storage tank (8). The middle part of the annular stepped sleeve (4) is provided with a shaft hole that matches the rotating shaft. The rotating shaft drives the annular stepped sleeve (4) and the rotor part of the magnetic bearing (5) to rotate. The annular stepped sleeve (4) is also provided with a drain hole (42) that connects the liquid storage tank (8) and the shaft hole.

2. The magnetic levitation fan impeller with a sealing device as described in claim 1, characterized in that: The end face of the mounting plate (1) is fixedly connected to an annular seal (6), which presses the outer static part of the magnetic bearing (5) to fix it in the stepped hole (2).

3. The magnetic levitation fan impeller with a sealing device as described in claim 2, characterized in that: The annular seal (6) is fixed to the mounting plate (1) by a number of bolts evenly distributed in an annular array.

4. The magnetic levitation fan impeller with a sealing device as described in claim 1, characterized in that: The drainage hole (42) is formed in a ring shape on the inner wall of the shaft hole.

5. The magnetic levitation fan impeller with a sealing device as described in claim 1, characterized in that: The storage tank (8) is filled with an absorbent sponge.

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