CN205761607U - A kind of neodymium-iron-boron magnetic material airflow milling powder device - Google Patents

Abstract

The utility model discloses a kind of neodymium-iron-boron magnetic material airflow milling powder device, including body, body is made up of outer cylinder body and inner barrel；Body upper end is provided with electric expansion bar, and electric expansion bar introduces that this is the most internal and be connected with division board upper end, and charge pipe and flour extraction pipe all stretch into internal, and flour extraction pipe left end is connected with grading wheel；Outer cylinder body lower end connects has circulation pipe, the circulation pipe other end to be connected with outer cylinder body upper end, is provided with circulating pump and chiller in circulation pipe, and circulation pipe is positioned at inside chiller and is divided into coil structure, is provided with blower fan in chiller；Air jet pipe is provided with four, in air jet pipe symmetry two-by-two stretches into inner barrel and is connected with Laval nozzle；This utility model internal temperature is low, and particle powder is the most excessively passivated, it is ensured that magnet performance, and dielectric gas requires low, and the cost saving nitrogen making machine or liquid nitrogen puts into；Grinding precision is high, and internal integral grinding is all efficient, promotes grinding efficiency.

Description

A kind of neodymium-iron-boron magnetic material airflow milling powder device

Technical field

This utility model relates to a kind of process equipment, specifically a kind of neodymium-iron-boron magnetic material airflow milling powder device.

Background technology

Neodymium-iron-boron magnetic material in process of production, needs in airflow milling powder, powder process, and needs pour lazy in inside Property gas, because atmospheric nitrogen Gas content is sufficient, generally using nitrogen is filled with, and Magnet manufacturing enterprise can use liquid nitrogen gasification or nitrogen processed Mechanism nitrogen two ways, and major part enterprise is all the nitrogen making machine nitrogen mode that use cost is lower, but nitrogen making machine output Nitrogen temperature is higher, and also can produce substantial amounts of heat during airflow milling powder inside collision friction, and nitrogen is at air-flow After mill has carried out a pulverizing, its nitrogen used often recycles, and the nitrogen temperature in this time is also that comparison is high , the temperature of nitrogen is high so that nitrogen does not give full play to as the protected effect of protective gas, in high temperature environments raw material Still oxygen that can be a small amount of with inside is passivated, and if being passivated excess and magnetic property will be caused to decline；Be filled with nitrogen, the most i.e. in order to Prevent particle powder because of high temperature oxidative deactivation, if internal temperature can be controlled, can directly utilize completely through filtration pure sky Gas, as abrasive media, saves the nitrogen step processed of nitrogen making machine, has saved cost input；Airflow milling is to use the impact of ultrahigh speed gas Granule makes its collision friction pulverize with realization, no matter the airflow milling of which kind of size is by the suitableeest processing capacity, now powder process effect Preferably, and time grain amount is few, airflow milling is bigger, it is easy to grinding precision not foot phenomenon occurs, will affect later stage magnetic finished product Quality, even difficult forming is frangible；The air nozzle of gas grinding machine is typically inclined and mounted at the funnel structure of gas grinding machine bottom, To guarantee to have enough chien shih granules when blowing to raise up, can be as the decay of intensity, it is not enough in middle and upper part intensity, by shadow Ring the efficiency ground.

Utility model content

The purpose of this utility model is to provide the neodymium iron boron that a kind of air dielectric requirement is low, grinding effect good, efficiency is high Magnetic material airflow milling powder device, with the problem solving to propose in above-mentioned background technology.

For achieving the above object, the following technical scheme of this utility model offer:

A kind of neodymium-iron-boron magnetic material airflow milling powder device, including body, charge pipe, flour extraction pipe and air jet pipe, described Body is made up of outer cylinder body and inner barrel, is provided with cavity between outer cylinder body and inner barrel；Described body upper end is provided with electric expansion Bar, electric expansion bar introduces that this is the most internal and is connected with division board upper end, and described division board is horizontally placed on internal, division board and Inner barrel seals and is slidably connected, and described charge pipe vertically stretches into internal, and charge pipe lower end connects the first telescoping tube, and first stretches Draw lower end causes the lower surface of division board；Body upper right side is provided with separation chamber, and separation chamber lower end is communicated with second and stretches Pipe, the second telescoping tube lower end causes the lower surface of division board, and it is indoor that described flour extraction pipe horizontally extends into separator box, flour extraction pipe left end with Grading wheel connects；Described outer cylinder body lower end connects has circulation pipe, the circulation pipe other end to be connected with outer cylinder body upper end, set in circulation pipe Having circulating pump and chiller, circulating pump and chiller to be fixedly connected with on the outer wall of body, circulation pipe is positioned at cooling dress Putting inside and be divided into coil structure, be provided with blower fan in chiller, connecting at circulation pipe minimum point has drain pipe, outer cylinder body upper end It is also associated with filling pipe；Described air jet pipe is provided with four, connects in air jet pipe symmetry two-by-two stretches into inner barrel and with Laval nozzle Connecing, air jet pipe lays respectively at centre position and the position, middle and lower part of body, and the air jet pipe other end is all connected with high-pressure air hose.

As further program of the utility model: the stroke of described electric expansion bar is less than the 1/2 of body height.

As this utility model further scheme: the greatest length of described first telescoping tube and the second telescoping tube is the biggest Stroke in electric expansion bar.

As this utility model further scheme: described grading wheel is connected with motor, motor is fixedly connected on On body.

Compared with prior art, the beneficial effects of the utility model are: utilize recirculated water to cool down whole body, make Internal temperature maintains a relatively low scope, whether by the pure air after nitrogen or filtration as abrasive media, its Low temperature environment all can guarantee that particle powder is the most excessively passivated, it is ensured that magnet performance, and dielectric gas requires low, can directly utilize completely Pure air after filtration, the cost saving nitrogen making machine puts into；By the size of division board scalable abrasive areas, at raw material relatively Time few, its suitableeest amount of grinding can be made to reduce by the way of reducing abrasive areas volume, it is ensured that grinding precision, simultaneously in the middle of body One group of nozzle is set up at position, promotes the grinding effect of middle and upper part granule, grinds uniform high-efficiency, promotes grinding efficiency.

Accompanying drawing explanation

Fig. 1 is the structural representation of a kind of neodymium-iron-boron magnetic material airflow milling powder device.

In figure: body-1, charge pipe-2, flour extraction pipe-3, air jet pipe-4, outer cylinder body-5, inner barrel-6, electric expansion bar- 7, division board-8, the first telescoping tube-9, separate chamber-10, the second telescoping tube-11, grading wheel-12, circulation pipe-13, circulating pump- 14, chiller-15, drain pipe-16, filling pipe-17, Laval nozzle-18, high-pressure air hose-19.

Detailed description of the invention

Below in conjunction with detailed description of the invention, the technical scheme of this patent is described in more detail.

Referring to Fig. 1, a kind of neodymium-iron-boron magnetic material airflow milling powder device, including body 1, charge pipe 2, flour extraction pipe 3 With air jet pipe 4, described body 1 is made up of outer cylinder body 5 and inner barrel 6, is provided with cavity, in cavity between outer cylinder body 5 and inner barrel 6 Cooling water can be filled and carry out the cooling of inner barrel 6；Described body 1 upper end is provided with electric expansion bar 7, and electric expansion bar 7 introduces this In body 1 and being connected with division board 8 upper end, described division board 8 is horizontally placed in body 1, and division board 8 and inner barrel 6 seal sliding Being dynamically connected, can slide up and down in inner barrel 6, described charge pipe 2 vertically stretches in body 1, and charge pipe 2 lower end connects first Telescoping tube 9, the first telescoping tube 9 lower end causes the lower surface of division board 8；Body 1 upper right side is provided with separation chamber 10, separates chamber 10 lower ends are communicated with the second telescoping tube 11, and the second telescoping tube 11 lower end causes the lower surface of division board 8, the first telescoping tube 9 and Two telescoping tube 11 lower ends are moved along with moving up and down of division board 8, it is ensured that feed intake and discharging effect, the first telescoping tube 9 and the The greatest length of two telescoping tubes 11 is all higher than the stroke of electric expansion bar 7, it is to avoid electric expansion bar 7 is pulled apart two and stretched when extending Pipe；Described flour extraction pipe 3 horizontally extends in separation chamber 10, and flour extraction pipe 3 left end is connected with grading wheel 12, and grading wheel 12 is in transmission connection Motor, motor is had to be fixedly connected on body 1；Described outer cylinder body 5 lower end connects circulation pipe 13, and circulation pipe 13 other end is with outer Cylinder 5 upper end connects, and is provided with circulating pump 14 and chiller 15, circulating pump 14 and chiller 15 all fixing even in circulation pipe 13 Being connected on the outer wall of body 1, circulation pipe 13 is positioned at chiller 15 inside and is divided into coil structure, is provided with wind in chiller 15 Machine, can lower the temperature to the cooling water of inner loop, it is to avoid change water frequently, ensure its cooling effect simultaneously；Circulation pipe 13 is Connecting at low spot has drain pipe 16, outer cylinder body 5 upper end to be also associated with filling pipe 17, cools down too high can not the reaching of cooling water temperature Effect carries out changing water；Described air jet pipe 4 is provided with four, in air jet pipe 4 symmetry two-by-two stretches into inner barrel 6 and with Laval nozzle 18 Connecting, air jet pipe 4 lays respectively at centre position and the position, middle and lower part of body 1, and the stroke of described electric expansion bar 7 is less than body The 1/2 of 1 height, even if so electric expansion bar 7 is elongated to the limit, does not interferes with centrally located air jet pipe 4 yet Airbrasive effect, air jet pipe 4 other end is all connected with high-pressure air hose 19, and high-pressure air hose is connected with air compressor machine or air accumulator, for Air jet pipe 4 provides gases at high pressure.

Operation principle of the present utility model is: NdFeB magnetic powder to add 1% about oxygen be passivated fresh magnetic powder surface, can To prevent follow-up pressure-type process from generating heat, passivation excessively can cause magnetic property to decline, and the passivation of NdFeB magnetic powder needs oxygen and height Temperature coordinates, and current anti-height passivation mode mainly uses and is filled with nitrogen, makes internal oxygen content only be reduced to and meets minimum passivation Requirement, but, so need, through nitrogen mechanism nitrogen, to step up its investment, and inside it, remain a certain amount of oxygen, The high temperature of nitrogen and the internal high temperature produced that grinds still can make part magnetic powder produce passivation phenomenon；This utility model uses circulation Water cooling, in making inner barrel 6, temperature maintains a relatively low scope, now, whether practical high temperature nitrogen (high hot oxygen is few) Or normal temperature air (low grade fever oxygen is many), its degree of passivation all can be effectively ensured, it is to avoid be excessively passivated, reduce impact dielectric gas Requirement, reduces cost；By regulation electric expansion bar 7, division board 8 is made to move up and down, the space size of scalable milling chamber, Make its suitableeest amount of grinding change, how much be adjusted according to raw material, it is ensured that grinding effect, be additionally provided with one group at mid portion simultaneously Laval nozzle 18, promotes the grinding effect of middle and upper part, grinds uniform high-efficiency.

Above the better embodiment of this patent is explained in detail, but this patent is not limited to above-mentioned embodiment party Formula, in the ken that one skilled in the relevant art is possessed, it is also possible on the premise of without departing from this patent objective Make a variety of changes.

Claims (4)

1. a neodymium-iron-boron magnetic material airflow milling powder device, including body (1), charge pipe (2), flour extraction pipe (3) and jet Pipe (4), it is characterised in that described body (1) is made up of outer cylinder body (5) and inner barrel (6), outer cylinder body (5) and inner barrel (6) it Between be provided with cavity；Described body (1) upper end is provided with electric expansion bar (7), in electric expansion bar (7) introduces body (1) and with every Connecting from plate (8) upper end, described division board (8) is horizontally placed in body (1), and division board (8) seals with inner barrel (6) and slides Connecting, described charge pipe (2) vertically stretches in body (1), and charge pipe (2) lower end connects the first telescoping tube (9), and first stretches Pipe (9) lower end causes the lower surface of division board (8)；Body (1) upper right side is provided with separation chamber (10), separates chamber (10) lower end Being communicated with the second telescoping tube (11), the second telescoping tube (11) lower end causes the lower surface of division board (8), described flour extraction pipe (3) water Flattened enter separate chamber (10) in, flour extraction pipe (3) left end is connected with grading wheel (12)；Described outer cylinder body (5) lower end connects to be followed Endless tube (13), circulation pipe (13) other end is connected with outer cylinder body (5) upper end, is provided with circulating pump (14) and cooling in circulation pipe (13) Device (15), circulating pump (14) and chiller (15) are fixedly connected with on the outer wall of body (1), and circulation pipe (13) is positioned at cold Radiator cooler (15) is internal is divided into coil structure, is provided with blower fan in chiller (15), and connecting at circulation pipe (13) minimum point has Drain pipe (16), outer cylinder body (5) upper end is also associated with filling pipe (17)；Described air jet pipe (4) is provided with four, air jet pipe (4) two In two symmetries stretch into inner barrel (6) and being connected with Laval nozzle (18), air jet pipe (4) lays respectively at the interposition of body (1) Putting and position, middle and lower part, air jet pipe (4) other end is all connected with high-pressure air hose (19).

A kind of neodymium-iron-boron magnetic material airflow milling powder device the most according to claim 1, it is characterised in that described electronic The stroke of expansion link (7) is less than the 1/2 of body (1) height.

A kind of neodymium-iron-boron magnetic material airflow milling powder device the most according to claim 1, it is characterised in that described first The greatest length of telescoping tube (9) and the second telescoping tube (11) is all higher than the stroke of electric expansion bar (7).

A kind of neodymium-iron-boron magnetic material airflow milling powder device the most according to claim 1, it is characterised in that described classification Wheel (12) is connected with motor, and motor is fixedly connected on body (1).