CN205141884U

CN205141884U - Magnetic force actuation sealing device to motor

Info

Publication number: CN205141884U
Application number: CN201521024811.1U
Authority: CN
Inventors: 黄涛; 牟炳双
Original assignee: China University of Petroleum East China
Current assignee: China University of Petroleum East China
Priority date: 2015-12-11
Filing date: 2015-12-11
Publication date: 2016-04-06
Anticipated expiration: 2025-12-11

Abstract

The utility model relates to a magnetic force actuation sealing device to motor, its characteristics are: include output shaft, spacer, follow moving magnet, main moving magnet, motor shaft, motor seal shell, servo motor, servo motor arranges in the motor seal shell, servo motor upper portion is provided with the motor shaft, main moving magnet fixes on motor shaft upper portion, be fixed in the output shaft lower part from moving magnet, main moving magnet and the coaxial distribution of follow moving magnet to the centre is separated by the spacer, constructs two independent spaces, becomes the static seal to the movive seal. It has following advantage: simple structure, sealing performance is good, and realization that can be very convenient is totally enclosed to the motor. And this kind of sealing device is simple to use, easily make and advantage such as long service life, does not have wearing and tearing and leaks the scheduling problem.

Description

A kind of Magnetic Coupler to motor

Technical field

The utility model relates to a kind of sealing device, particularly a kind of Magnetic Coupler being applicable to work drive motor in liquid environment.

Background technology

At present, most plant equipment needs to work in the liquid environment of complexity, if can not improve the sealing property of motor, being immersed in liquid environment by motor for a long time works can produce larger destruction to motor.Nowadays market has a lot for the mode of motor sealing, the movable sealing mode often used has packing seal, seal with O ring, mechanical seal and magnet fluid sealing etc.

The mode Application comparison of seal with O ring is extensive, and it mainly relies on the crimp of seal to block leakage path, reaches sealing effectiveness.But be applied in movable sealing and can produce frictional resistance, can a large amount of heat production when motor shaft fast rotational, make O shape enclose quick aging, useful life is short.

Two end faces that its principle of mechanical seal is perpendicular to rotating shaft utilize when doing motion mutually and keep sealing under the elastic force of compensation mechanism or the acting in conjunction of fluid pressure.But when motor shaft rotates, sealing mode just there will be crannied situation between rotating shaft and casing, easily leaks, especially poor in high-speed motion lower seal effect.

Magnet fluid sealing relies on a kind of magnetic fluid be made up of nano level magnetic-particle to form liquid O V-shaped ring to seal.This kind of sealing means poor effect when hydraulic seal medium, and thermal adaptability is very poor, and magnetic fluid runs into high temperature and will evaporate.

Utility model content

The utility model is intended to solve the problem, and provides a kind of Magnetic Coupler, which overcomes easily aging, the easy leakage of conventional motors sealing device, unstable drawback.Its technical scheme adopted is as follows:

A kind of Magnetic Coupler to motor, it is characterized in that, comprise output shaft, spacer, driven magnet, initiatively magnet, motor shaft, motor seal shell, servomotor, described servomotor is placed in motor seal shell, described servomotor top is provided with motor shaft, described active magnetic ferropexy is on motor shaft top, described driven magnet is fixed on output shaft bottom, described active magnet and driven magnet coaxially distribute, and centre is separated by spacer, construct two independent spaces, movable sealing is become static seal.

On technique scheme basis, described active magnet and driven magnet arrange the strong magnets of 12 pairs of N-S poles respectively, magnet radial magnetizing, coupled poles radially distributes, the distribution mode of this magnetic pole can reduce the size in horizontal direction, ensures that in minimum space coupled poles can the distribution of maximum area.

The utility model tool has the following advantages: structure is simple, good seal performance, and what can realize motor very easily is hermetically sealed.And this kind of sealing device uses simply, is easy to the advantages such as manufacture and long service life, there is not the problems such as wearing and tearing and leakage.

Accompanying drawing explanation

Fig. 1: a kind of Magnetic Coupler to motor faces structural representation;

Fig. 2: a kind of Magnetic Coupler to motor overlooks cross-sectional schematic;

Symbol description

1. output shaft, 2. spacer, 3. driven magnet, 4. active magnet, 5. motor shaft, 6. motor seal shell, 7. servomotor.

Embodiment

Below in conjunction with accompanying drawing and example, the utility model is described in further detail:

As shown in Figure 1-2, a kind of Magnetic Coupler to motor, comprise output shaft 1, spacer 2, driven magnet 3, initiatively magnet 4, motor shaft 5, motor seal shell 6, servomotor 7, described servomotor 7 is placed in motor seal shell 6, described servomotor 7 top is provided with motor shaft 5, described active magnet 4 is fixed on motor shaft 5 top, described driven magnet 3 is fixed on output shaft 1 bottom, described active magnet 4 and driven magnet 3 coaxially distribute, and centre is separated by spacer 2, construct two independent spaces, movable sealing is become static seal.

Preferably, described active magnet 4 and driven magnet 3 arrange the strong magnets of 12 pairs of N-S poles respectively, magnet radial magnetizing, coupled poles radially distributes, the distribution mode of this magnetic pole can reduce the size in horizontal direction, ensures that in minimum space coupled poles can the distribution of maximum area.

Operationally, servomotor 7 drive motors axle 5 rotates, thus the active magnet 4 be fixed on above motor shaft 5 is rotated, and under powerful magnetic drive, driven magnet 3 can be followed initiatively magnet 4 and be rotated, thus makes output shaft 1 by the moment transmission of motor shaft 5; Motor shaft 5 in this structure does not stretch out outside casing due to the effect of spacer 2, does not therefore just need the movable sealing of the forms such as mechanical seal, packing seal, Fluid Sealing, can realize totally-enclosed; Motor seal shell 6 allows servomotor 7 be in the anti-pressure ability that improve device in static seal environment greatly.

Be illustrated the utility model by way of example above, but the utility model is not limited to above-mentioned specific embodiment, all any changes of doing based on the utility model or modification all belong to the claimed scope of the utility model.

Claims

1. the Magnetic Coupler to motor, it is characterized in that, comprise output shaft (1), spacer (2), driven magnet (3), initiatively magnet (4), motor shaft (5), motor seal shell (6), servomotor (7), described servomotor (7) is placed in motor seal shell (6), described servomotor (7) top is provided with motor shaft (5), described active magnet (4) is fixed on motor shaft (5) top, described driven magnet (3) is fixed on output shaft (1) bottom, described active magnet (4) and driven magnet (3) coaxially distribute, and centre is separated by spacer (2), construct two independent spaces, movable sealing is become static seal.

2. a kind of Magnetic Coupler to motor according to claim 1, is characterized in that, described active magnet (4) and driven magnet (3) arrange the strong magnets of 12 pairs of N-S poles respectively.