CN112169910A

CN112169910A - Quick radiating ceramic mill device

Info

Publication number: CN112169910A
Application number: CN201910596910.3A
Authority: CN
Inventors: 朱德恩
Original assignee: Shanghai Guli Intelligent Equipment Co ltd
Current assignee: Shanghai Guli Intelligent Equipment Co ltd
Priority date: 2019-07-03
Filing date: 2019-07-03
Publication date: 2021-01-05

Abstract

An aluminium alloy casing is arranged on the back of metal or ceramic silicon carbide grinding disc, the casing is hollow, cooling liquid is led in from the center and thrown out along spiral rotation, and the contact surface of the bottom of the grinding disc is treated by fluororesin. The center is magnetic fluid seal or slip ring mechanical seal, because the cooling liquid and the millstone are fully contacted for heat convection, turbulence beads (liquid drops are condensed) are continuously superposed, thereby realizing the purposes of rapid cooling and rapid heat dissipation.

Description

Quick radiating ceramic mill device

Technical Field

The invention relates to the field of food mills, in particular to the technical fields of small and medium-sized food mills, such as food low-temperature grinding of tea-making mills, flour mills, herbal mills and the like.

Background

Many granular powder materials are sensitive, high temperature is generated in grinding, the materials are rapidly oxidized and deteriorated, and cooling measures must be additionally arranged. The tradition sets up the cooling of jacket water-cooling at machine shell, but speed is slow, and the effect is poor, and the shape is with the nominal, reason:

1. the jacket is not directly contacted with the grinding disc, and a large amount of air resistance is arranged in the middle;

2. the heat conductivity coefficient of the grinding disc material is lower than 40W/m.k;

3. the heat-dissipating medium has insufficient specific heat capacity.

Disclosure of Invention

High heat conduction: alpha polycrystalline silicon carbide is sintered under no pressure, nano silicon carbide whiskers are toughened, the porosity is less than or equal to 1%, the heat conduction is 120-130W/m.k, and the hardness is 2600.

The method comprises the following steps of 440 ℃ stainless steel hot forging forming, turning, vacuum spraying titanium-plated nano-diamond 20-30 mu m on the surface, vacuum thermal diffusion at 1010 and 1070 ℃ under the condition of hot static pressure of 20-50MPa, and after nano-diamond enhancement treatment, the hardness of quenching heat treatment reaches: HRC65, heat conductivity coefficient 45W/m.k, self-lubrication, grinding disc thickness of 15mm, boundary layer of 2mm, super-hydrophobic treatment, heat exchange is greatly enhanced.

The water pan is 6061-6063T6, and the surface of the aluminum alloy is subjected to hard oxidation hole sealing treatment.

The cooling liquid enters from the axle center and exits from the edge.

The contact part of the grinding disc and the cooling liquid is treated by vortex threads, so that the heat exchange area is increased.

The contact surface of the grinding disc adopts a fluororesin PTFE coating with the thickness of 0.05-0.5 μm to form bead-shaped condensation, and the contact angle of non-stick water is 115 degrees and the contact angle (degree) of rest.

The wall surface can not be wetted by the condensate containing water or oil, the condensate forms small liquid drops on the wall surface, after the liquid drops grow up, the liquid drops continuously carry other liquid drops along the way to flow down along the wall surface under the action of gravity, meanwhile, the new liquid drops regenerate in the original path, and the phase change heat released by condensation can be directly transferred to the wall surface. The prerequisite of the dropwise condensation is that the condensate does not wet the wall surface, the contact angle is large, and the surface energy of the condensate wall material is low.

Drawings

In the figure: 1. a rotor (a rotary water containing disc) 2, a drain hole 3, a water inlet hole 4, a slip ring main body 5, a water outlet pipe 6 and a balance weight pipe;

FIGS. 1-4 are schematic structural views of the present invention;

FIG. 5 is a front view;

FIG. 6 is a side view;

FIG. 7 is a schematic view of a silicon carbide abrasive disc;

FIG. 8 is a bottom view of a silicon carbide disk;

fig. 9 is an aluminum alloy enclosure.

Detailed Description

And (3) carrying out dry pressing on the alpha polycrystalline silicon carbide by using the die, carrying out pressureless sintering, or carrying out isostatic pressing, and turning.

The bottom of the grinding disc is provided with a spiral-toothed impeller, so that the heat exchange area is increased, and turbulent heat exchange is enhanced.

The water containing disc is made of 6063T6, the surface is hard and oxidized, and the inner diameter of the disc opening is slightly smaller than the diameter of the grinding disc by 50-60 mu m.

Heating the aluminum alloy disc to 150 ℃ for heat preservation, pressing the grinding disc into the step by using a rubber hammer, and brazing and sealing.

The aluminum alloy plays the dual role of containing cooling liquid and reinforcing the ceramic grinding disc.

The grinding disc is in a spline structure and is fixed with the main shaft.

The cooling liquid is pumped into the grinding disc from the shaft center and is scattered by the three-stage impeller to form turbulent heat exchange.

Spraying PTFE-D emulsion aqueous dispersion (structural formula is-CF) with average particle diameter of 0.15-0.35 μm and concentration of 60 mass% on the bottom surface of the grinding disc₂-CF₂-)_n) The nano diamond with 5 to 7 percent of molecular weight is strengthened to improve the strength and have excellent wear resistance.

Suspension resin (fine powder with the particle size of 20-50 μ M, the apparent density of 0.2-0.5g/mL, the average particle size of M-18 of 40 μ M, the density of 0.45g/mL, high-frequency resonance mixing with nano zirconia micro powder, hot isostatic pressing at 380-.

The rotary joint is used for water circulation of a mechanical hard sealing slip ring.

Claims

1. A grinding disc device capable of dissipating heat at the highest speed is characterized in that alpha polycrystal is carbonized, pressureless sintered or isostatic pressed.

2. The disc assembly of claim 1 wherein the disc serrations are one dry press formed, two sanded, surface rasped serrations.

3. The millstone device of claim 1, wherein the millstone is made of 440 ℃ stainless steel by hot forging, secondary turning, 30-50 μm titanium-plated nano-diamond by surface spraying, vacuum thermal diffusion of nano-diamond at 1010 and 1070 ℃ under the condition of hot static pressure of 20-50MPa, and processing and quenching heat treatment.

4. The abrasive disc device according to claim 1, characterized in that the disc thickness is 15mm, the boundary layer is 2mm, and the surface layer nano-diamond dispersion enhanced PTFE (aqueous polytetrafluoroethylene solution) is treated with a fixed telephone at 350 ℃.

5. The millstone device of claim 1, wherein the millstone bottom is provided with double-section spiral insections to enhance turbulent heat exchange.

6. The disc refiner apparatus of claim 1 wherein the feed is provided by a hollow slip ring, the slip ring being journaled on the drive shaft.

7. The abrasive disc device of claim 1 wherein the coolant enters the center of the shaft and exits at the edge.

8. The abrasive disc device of claim 1 wherein the upper water tray is integral with the slip ring.

9. The millstone device of claim 1, characterized in that the machine is an integrated structure, and the millstone, the water containing disc and the multi-channel slip ring are integrally designed.

10. The abrasive disc device of claim 1 wherein the present machine employs turbulent heat exchange.

11. The abrasive disc device of claim 1 wherein the present machine employs droplet condensation technology.