INFILTRATION DEVICE AND METHOD

• US 20170051390A1
• Filed: 03/03/2016
• Published: 02/23/2017
• 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
• Granted Patent: US 10,138,540 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• 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, characterized by comprising:

a heating room having an annular groove and provided with a heating room opening end at a lower end;

a rotary tray arranged below the heating room opening end;

a rotary bracket installed on the rotary tray;

a material box arranged on the rotary bracket;

an elevating mechanism that enables the rotary tray to move upward and downward so that the rotary bracket and the material box enter the annular groove from the heating room opening end or exit the opening end from the annular groove; and

a transmission device for enabling the rotary bracket to spin in the annular groove and revolve around a central axis of the rotary tray.

2. The infiltration device according to claim 1, characterized in that the heating room comprises:

heating members disposed at both sides of an inner wall of the annular groove, the heating members being at an equal distance from a center of the rotary bracket so as to perform an equal-distance heating on the material box from both sides; 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 is a reflective screen, and a fire-resistant temperature keeping material is filled inside the heating room temperature keeping member.

3. The infiltration device according to claim 1, characterized in that the heating room further comprises:

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

a vent opening/closing unit provided below the vents for opening/closing the vents, the vent opening/closing unit having a reflective screen that serves to keep the temperature when the vent opening/closing unit is in a closed state, wherein the vents are not completely closed when the vent opening/closing unit is in the closed state.

4. The infiltration device according to claim 1, characterized in that the rotary tray comprises:

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, a cooling channel being provided inside the support member.

5. The infiltration device according to claim 1, characterized in that the infiltration device further comprises:

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

6. The infiltration device according to claim 1, characterized in that the rotary brackets are installed on the rotary tray in an annular array via rotary mechanisms.

7. The infiltration device according to claim 1, characterized in that the transmission device comprises:

a first transmission member 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 for driving the rotary bracket to spin.

8. The infiltration device according to claim 1, characterized in that the material box has a protrusion at the bottom, an upper cover of the material box has a recessed groove, and the protrusion of the material box and the recessed groove of the material box are arranged to fit with each other so that different material boxes are superimposed on each other in a concentric positioning manner.

9. The infiltration device according to claim 8, characterized in that the rotary bracket has a recessed groove in the upper portion, and the recessed groove of the rotary bracket and the protrusion at the bottom of the material box are arranged to fit with each other so that the material box is placed on the rotary bracket in a concentric positioning manner.

10. A method for performing high temperature infiltration on magnets using the infiltration device according to claim 1, characterized by comprising the steps of:

(1) charging;

placing a single layer or plural layers of the magnets in the material box;

using the elevating mechanism to lower the rotary tray and the rotary brackets as a whole so as to place a single layer or plural layers of the material boxes on the rotary brackets;

using the elevating mechanism to raise the rotary tray and the rotary brackets as a whole so that the material boxes enter the annular groove of the heating room;

(2) vacuum-pumping;

vacuum-pumping the heating room;

(3) high temperature infiltrating;

using the transmission device to rotate the rotary tray so that the rotary bracket spins in the annular groove and revolves around the annular groove of the heating room;

controlling the rotation speed of the rotary tray and the heating temperature of the heating room so as to perform infiltration treatment on the magnets;

(4) cooling;

delivering argon gas cooled by circulation into the heating room from the vents so as to cool the magnets loaded in the material boxes and having been subjected to the infiltration; and

(5) discharging;

using the elevating mechanism to lower the rotary tray so as to withdraw the material boxes loaded with the magnets having been subjected to the infiltration.