CN2054448U

CN2054448U - Rotary rare-earth permanent-magnet hoisting permanent-magnet iron

Info

Publication number: CN2054448U
Application number: CN 89209147
Authority: CN
Inventors: 杨树清; 丁立功
Original assignee: Jilin University Science And Technology Development Research Center
Current assignee: Jilin University Science And Technology Development Research Center
Priority date: 1988-07-03
Filing date: 1988-07-03
Publication date: 1990-03-14

Abstract

The utility model discloses a new rare-earth permanent-magnet hoisting permanent-magnet iron, which makes use of a magnetic shunt principle to make a working magnetic flux implement a short-circuit and take off sucked objects by rotating a magnetic short circuit magnetic yoke. In this way, iron filings are sucked on the working magnetic yoke and the sucked objects are sucked firmly, so the working is safe. Because the drawn objects can be taken off without other mechanisms, the manufacturing cost of the permanent magnet is reduced.

Description

Rotary rare-earth permanent-magnet hoisting permanent-magnet iron

Technical field of hoisting equipment under the utility model.

Seeing what use in producing at present both at home and abroad is that magnetic source is the strontium calcium ferrite, lays down to inhale that thing adds force method with lever and the hoisting permanent magnet of inhaling thing is unloaded to reach to inhale in the excitatory increase and decrease of pulse magnetic field.The shortcoming of these two types of hoisting permanent magnets is that to inhale heavy weight less, lay down and when picking up weight the work magnetic-field intensity constant or change little.Suct a large amount of iron filings on the yoke easily like this, cause and inhale great amplitude and reduce, attract that weight is not firm to cause operational reliability and safety bad, safety misadventure very easily takes place in work.

Purpose of the present invention is exactly to overcome the above-mentioned shortcoming of existing hoisting permanent magnet.By magnetic Circuit Design dexterously, lay down the magnetic-field intensity on its work yoke when inhaling thing only when picking up weight about 1%.Be difficult for sucting iron filings on the work yoke like this, thereby make it safe and reliable.

The main contents and the technical characterictic of rotary type hoisting permanent magnet of the present invention are: (1) lays down for reaching hoisting permanent magnet that the work magnetic-field intensity is less than several ten oersteds when inhaling thing, and is reliable thereby the work yoke of causing is not inhaled the iron filings job safety.Adopt the magnet shunt principle, one of design is with ingot iron or A in the permanent magnet magnetic circuit ₃The magnet short-cut path yoke that the permeability magnetic material of steel is made, it can rotate to and the yoke top of working causes the short circuit of work magnetic flux to reach during at same axis to lay down the purpose of inhaling thing around anchor shaft.Not inhaling on the yoke of working simultaneously has iron filings, or inhales a little iron filings is arranged, thereby the attraction fastness that has increased so greatly ferrimagnetism suction thing has increased the reliability and security of operation.

(2) magnetic source of magnetic circuit is that several rows of upper and lower surface that are placed on work yoke top can be formed a plurality of unit rare earth composite permanent magnets by the rare-earth permanent magnet of various modern high magnetic, high HCJ.Each unit composite rare earth permanent magnet body is by two rare-earth permanent magnets its middle recruitment industry pure iron or A ₃The polarity of each the unit composite rare earth permanent magnet body on the work that is placed on yoke one side that steel connects to form is identical.

The advantage that rotary type rare earth permanent magnet hoisting permanent magnet of the present invention is compared with prior art had is that the permanent magnet suction is not heavily limited by its structural principle, again owing to adopt the field shunting principle, lay down can cause when inhaling thing the short circuit of work magnetic flux to make the work yoke magnetic-field intensity only for inhaling about 1% when heavy.Therefore not inhaling on the yoke of working has iron filings or suction that a little iron filings is arranged, and can make permanent magnet hold weight so solid and reliablely, makes it safe and reliable.

Fig. 1 is a rotary type rare earth permanent magnet hoisting permanent magnet scheme drawing

1 is actuating device, and 2 is housing, and 3 is magnetic circuit.

Fig. 2 is the magnetic circuit scheme drawing of rotary type rare earth permanent magnet hoisting permanent magnet.

A is the magnet short-cut path yoke, and B is a unit composite rare earth permanent magnet body, and C is the work yoke.

Claims

1, the rotary type rare earth permanent magnet hoisting permanent magnet of forming by actuating device, housing and magnetic circuit, it is characterized in that its magnetic circuit be by work yoke, the position its in the middle of magnet short-cut path yoke identical with a few row's structures that are fixed on work yoke above and below can be by the rare-earth permanent magnet and the A of various modern high magnetic, high HCJ ₃The unit rare earth composite permanent magnet that steel or ingot iron constitute is formed.

2,, it is characterized in that unit rare earth composite permanent magnet is by two rare-earth permanent magnets its middle recruitment industry pure iron or A according to the described rotary type rare-earth permanent magnet of claim 1 ₃Steel couples together composition.

3, according to the described rotary type rare-earth permanent magnet of claim 1, the rare-earth permanent magnet that it is characterized in that component units rare earth composite permanent magnet can be samarium praseodymium cobalt rare-earth permanent magnet, the 2:17 rare-earth permanent magnet, appoint in the cerium cobalt copper rare-earth permanent magnet, Fe-B rare-earth permanent magnet and they and get two kinds of rare-earth permanent magnets.

4, it is characterized in that by ingot iron or A according to the described magnet short-cut path yoke of claim 1 ₃Steel is made, and it can rotate around anchor shaft.