CN201369665Y

CN201369665Y - Disk-type magnetic remanence brake

Info

Publication number: CN201369665Y
Application number: CNU2009201151272U
Authority: CN
Inventors: 孙红辉
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-03-11
Filing date: 2009-03-11
Publication date: 2009-12-23
Anticipated expiration: 2019-03-11

Abstract

The utility model relates to a disk-type magnetic remanence brake by adopting the magnetic remanence principle, which is generally used in a moment brake of a mechanical system or a dynamometer of an electric motor. The disk-type magnetic remanence brake comprises a rotary shaft (1) and a magnet exciting coil (7), wherein the rotary shaft (1) penetrates through an upper end cover (3) and a lower end cover (6); and a magnetic rotor (2) is connected on the shaft body of the rotary shaft (1) by a flange (5). The disk-type magnetic remanence brake is characterized in that the magnetic rotor (2) takes the plate disk shape; the magnet exciting coil (7) and the magnetic rotor (2) are arranged in the upper end cover (3) and the lower end cover (6); the upper end cover and the lower end cover are buckled with each other correspondingly and are connected with each other by a screw, so as to form a dust proof structure; and the magnetic rotor (2) is located at the middle position axially in the ring of the magnet exciting coil (7). In the disk-type magnetic remanence brake, as the plate disk shaped magnetic rotor is not provided with a wall part, the magnetic rotor is not affected by centrifugal force generated by rotating speed basically when in high-speed rotation, the magnetic rotor is not easy to be crushed, and the service life is long; the axial dimension of the brake can be shortened obviously, and the volume and cost are reduced correspondingly. In addition, the dust proof structure can prevent fine dust, metal crumb and the like from being entering air gaps, so as to protect the magnetic rotor; and the magnetic rotor is located at the axial middle position with the highest magnetic density in the ring of the circular magnet exciting coil, and the brake sensitivity is high.

Description

Disc type hysteresis brake

Technical field

The utility model relates to a kind of disc type hysteresis brake that utilizes the magnetic hysteresis principle, is generally used for the moment braking of mechanical system or the dynamometer of motor torque.

Background technology

In known hysteresis brake, shown in Chinese patent CN982441185 " inner-cooled hysteresis brake ", the magnetic field orthotropic that cup-shaped rotor of being made by hard magnetic material and magnet exciting coil produce, the wall of cup outside is the air gap groove, magnet rotor is subjected to the effect in magnetic field and produces a kind of braking force; When hysteresis brake was used to the high speed rotating state, because action of centrifugal force, the wall of cup of rotor was because thinner, and crisp firmly, and very easily broken, useful life is shorter, and the range of application of brake is subjected to the restriction of rotating speed; Magnet exciting coil is positioned at a side of cup-shaped rotor bead, and the brake axial dimension is bigger, causes volume to increase the cost height.

The utility model content

Technical problem to be solved in the utility model is to overcome the deficiencies in the prior art, provide the suffered centrifugal force of a kind of rotor basically with the irrelevant disc type hysteresis brake of rotating speed.

The technical solution of the utility model is: a kind of disc type hysteresis brake, and comprise and run through the rotating shaft and the magnet exciting coil of end cap up and down, connect magnet rotor by flange on the rotating shaft axle body, it is characterized in that magnet rotor is dull and stereotyped plate-like.

In the end cap, end cap fastened the dustproof construction that connects into sealing with screw relatively up and down about described magnet exciting coil and magnet rotor were loaded on.

Described magnet rotor is positioned at the axial centre position of circular excitation coil loop.

The described cylinder position of end cap up and down constitutes magnetic pole of the stator simultaneously.

The utility model is owing to adopted said structure, and dull and stereotyped plate-like magnet rotor is not subjected to the influence of the centrifugal force of rotating speed generation basically owing to there is not wall portion when high speed rotating, be difficult for fragmentation, long service life; Dustproof construction can prevent that dust, metal fillings grain etc. from entering air gap, the protection magnet rotor; Magnet rotor is positioned at the strongest axial centre position of circular excitation coil loop internal magnetic field density, sensitivity height; Because magnet rotor 2 is made dull and stereotyped plate-like, the brake axial dimension can obviously shorten, and correspondingly volume, cost all can reduce.

Description of drawings

Fig. 1 is the utility model front view;

Fig. 2 is the A-A sectional view of Fig. 1;

Mark among the figure: rotating shaft 1, magnet rotor 2, upper end cover 3, coil rack 4, flange 5, bottom end cover 6, magnet exciting coil 7, end cap cylinder position 8.

Embodiment

The utility model is described in further detail below in conjunction with accompanying drawing: disc type hysteresis brake, rotating shaft 1 run through upper and

lower end cap

3,6, and rotating shaft 1 is connected by metal (upper with brake apparatus, and magnet rotor 2 is made dull and stereotyped plate-like.Affixed flange 5 on the axle body of rotating shaft 1, magnet rotor 2 is screwed on flange 5, and the card both sides are air gap, and in the end cap, the cylinder position 8 of end cap constituted magnetic pole of the stator simultaneously up and down about magnet exciting coil 7 and magnet rotor 2 were loaded on.Between circular excitation coil 7 and the upper and

lower end cap

3,6 skeleton 4 is housed, dull and stereotyped plate-like magnet rotor 2 is positioned at the axial centre position of magnet exciting coil ring, end cap relatively directly fastens with screw and connects into enclosed construction up and down, can prevent that dust, metal fillings grain etc. from entering air gap.

Claims

1, a kind of disc type hysteresis brake comprises the rotating shaft (1) and the magnet exciting coil (7) that run through upper and lower (3,6) end cap, connects magnet rotor (2) by flange (5) on rotating shaft (1) axle body, it is characterized in that magnet rotor (2) is dull and stereotyped plate-like.

2, according to the described disc type hysteresis brake of claim 1, it is characterized in that magnet exciting coil (7) and magnet rotor (2) are loaded in the upper and lower end cap (3,6), end cap fastens the dustproof construction that connects into sealing with screw relatively up and down.

3,, it is characterized in that magnet rotor (2) is positioned at the axial centre position of circular excitation coil (7) ring according to claim 1 or 2 described disc type hysteresis brakes.

4,, it is characterized in that the cylinder position (8) of upper and lower end cap constitutes magnetic pole of the stator simultaneously according to the described disc type hysteresis brake of claim 1.