Infiltration device and method

• US 10,138,540 B2
• Filed: 03/03/2016
• Issued: 11/27/2018
• Est. Priority Date: 08/20/2015
• Status: Active Grant

• Current Assignee: Baotou Tianhe Magnetic Materials Technology Company Limited
• Original Assignee: Tianhe (Baotou) Advanced Tech Magnet Co., Ltd.
• Inventors: Miao, Juchang, Zhai, Yong, Ma, Jianxin, Gao, Enfeng, Song, Yanling, Diao, Shulin, Dong, Yi, Yi, Haibo, Wu, Shujie, Yuan, Yi, Chen, Ya, Yuan, Wenjie
• Primary Examiner(s): Hassanzadeh, Parviz
• Assistant Examiner(s): Ford, Nathan K
• Application Number:
  US15/059,806
• Publication Number:
  US 20170051390A1
• Time in Patent Office: 999 Days
• CPC Class Codes: C23C 14/046 Coating cavities or hollow spaces, e.g. interior of tubes; Infiltration of porous substrates
• CPC Class Codes: F27D 19/00 Arrangements of controlling devices
• CPC Class Codes: F27D 2003/0034 Means for moving, conveying, transporting the charge in the furnace or in the charging facilities
• CPC Class Codes: F27D 21/00 Arrangements of monitoring devices; Arrangements of safety devices
• CPC Class Codes: F27D 3/0024 of metallic workpieces
• CPC Class Codes: F27D 7/02 Supplying steam, vapour, gases, or liquids
• CPC Class Codes: H01F 41/0293 diffusion of rare earth elements, e.g. Tb, Dy or Ho, into permanent magnets

Abstract

An infiltration device comprises a heating room, a rotary tray, a rotary bracket, a material box, an elevating mechanism and a transmission device, wherein the heating room has an annular groove, and the rotary tray is arranged below an opening end at a lower end of the heating room; the rotary bracket is installed on the rotary tray; the material box is arranged on the rotary bracket; the rotary tray and the material box can move upward and downward under the action of the elevating mechanism; the rotary bracket can spin in the annular groove and revolve around a central axis of the rotary tray under the action of the transmission device. The infiltration method provided by the invention comprises the steps of charging, vacuum-pumping, high temperature infiltrating, cooling, discharging, etc.

Claims

1. An infiltration device for performing infiltration treatment on surface layers of magnets comprising:

a heating room having an annular groove formed by opposing inner walls and provided with a heating room opening end at a lower end;

a rotary bracket installed on a rotary tray;

a plurality of material boxes of cylindrical shape arranged on the rotary bracket, the material boxes adapted to be superimposed for supporting a single layer or a plurality of layers of the magnets;

the rotary tray having a central axis and arranged below the heating room opening end, the rotary tray adapted to move upward and downward whereby the rotary bracket and the material boxes enter the annular groove from the heating room opening end or exit the heating room opening end from the annular groove; and

a transmission device adapted to spin the rotary bracket in the annular groove and revolve around the central axis of the rotary tray;

wherein the heating room includes heating members provided at the opposing inner walls forming the annular groove, the heating members provided at an equal distance from a center of the rotary bracket to perform an equal-distance heating on the material box from both inner walls; and

a heating room temperature keeping member, the heating room temperature keeping member forming the annular groove, wherein a surface layer of the heating room temperature keeping member comprises a reflective screen, and a fire-resistant temperature keeping material is filled inside the heating room temperature keeping member;

wherein the rotary tray includes a tray temperature keeping member for keeping the temperatures of the heating room and the material box; and

a support member provided below the tray temperature keeping member, and a cooling channel provided inside the support member for maintaining a temperature of the magnets;

wherein each of the material boxes have a circular protrusion formed at a center of a bottom surface and a circular recessed groove formed at a center of an upper surface, and the protrusion of one material box and the recessed groove of an underlying material box are arranged to fit with each other whereby a plurality of material boxes are adapted to be superimposed on each other in a concentric positioning manner; and

wherein the rotary bracket has a circular recessed groove formed in its upper surface, and the recessed groove of the rotary bracket and the protrusion at the bottom surface of one of the material boxes are arranged to fit with each other whereby the one material box is placed on the rotary bracket in a concentric positioning manner;

vents provided at an upper portion of the heating room arranged in an annular array; and

a vent opening and/or closing unit provided below the vents inside the heating room for opening and/or closing the vents, the vent opening and/or closing unit having a reflective screen adapted to keep the temperature when the vent opening and/or closing unit is in a closed state, wherein the vents are not completely closed when the vent opening and/or closing unit is in the closed state.

2. The infiltration device according to claim 1, wherein the infiltration device further comprises:

a controller for controlling a rotation speed of the rotary tray and a heating temperature of the heating room.

3. The infiltration device according to claim 1, wherein the rotary brackets are provided on the rotary tray in an annular array.

4. The infiltration device according to claim 1, wherein the transmission device comprises:

a first transmission member adapted for driving the rotary tray to rotate and for driving the rotary bracket to revolve around the central axis of the rotary tray; and

a second transmission member adapted for driving the rotary bracket to spin.