阅读说明：本技术 一种大瓦气冷式球磨机 (Large tile air cooling type ball mill ) 是由 罗怀征 白永华 梁维典 林福源 韦伟 唐咸萍 黄文靠 程尤远 于 2019-10-31 设计创作，主要内容包括：本发明公开了一种大瓦气冷式球磨机,属于矿用的破碎磨粉技术,具体涉及用圆筒形磨碎机技术领域。本发明在大瓦罩上安装空气冷却装置,其原理是把常温空气或降温冷空气通过进风口强制鼓风进入主轴及大瓦瓦腔内,增加冷空气与大瓦、大瓦座以及油液的换热接触面积,并将其热气强制排出,从而降低大瓦密闭空间的温度,进而达到冷却大瓦目的。(The invention discloses a large tile air-cooled ball mill, belongs to the crushing and grinding technology for mines, and particularly relates to the technical field of cylindrical grinding mills. The invention discloses an air cooling device arranged on a large tile cover, which has the principle that normal temperature air or cooling cold air is forced to enter a main shaft and a large tile cavity through an air inlet, so that the heat exchange contact area of the cold air with a large tile, a large tile seat and oil is increased, and hot air is forced to be discharged, so that the temperature of a large tile closed space is reduced, and the purpose of cooling the large tile is achieved.)

1. The utility model provides a big tile air-cooled ball mill, includes the frame and sets up the ball mill body in the frame, the ball mill body includes barrel, bearing assembly, drive assembly and driving motor, the barrel both ends are installed in the frame through bearing assembly respectively, bearing assembly includes big tile, big tile seat and big tile cover, be provided with the tile chamber in the big tile cover, big tile and big tile seat set up in the tile chamber, and big tile sets up on the big tile seat, the barrel main shaft runs through big tile cover both ends and sets up on big tile, driving motor passes through drive assembly drive barrel and rotates its characterized in that: the air cooling device comprises an air supply mechanism and a ventilation pipe, air inlet parts communicated with the tile cavities are respectively arranged on two sides of the lower part of the large tile cover, air outlet parts communicated with the tile cavities are arranged on the upper part of the large tile cover, and the air supply mechanism is connected to the air inlet parts through the ventilation pipe; the air supply mechanism is operated to supply air to the tile cavity, and the air is blown towards the direction of the main shaft of the cylinder body through the air inlet part.

2. The large tile air cooled ball mill of claim 1, wherein: the air purifier is arranged on the air inlet side of the air supply mechanism to filter and purify the inlet air.

3. The large tile air cooled ball mill of claim 2, wherein: the air supply mechanism is a fan for conveying natural air or an air conditioning system for conveying cold air.

4. The large tile air cooled ball mill of claim 1, wherein: the oil film heat dissipation mechanism comprises an oil injection part, a circulating pipe and a circulating pump, wherein the oil injection part is arranged at the top of the tile cavity of the large tile cover, the inlet end of the circulating pump is connected to an oil liquid pool at the bottom of the tile cavity through the circulating pipe, and the outlet end of the circulating pump is connected to the inlet end of the oil injection part through the circulating pipe; the circulating pump is operated to convey oil to the oil injection piece, and the outlet end of the oil injection piece outputs a plurality of layers of curtain-shaped oil.

5. The large tile air cooled ball mill of claim 4, wherein: oil output by the oil spraying piece falls on the outer wall surface of the cylinder main shaft, and the intersecting line of the surface where the oil curtain is located and the outer wall surface of the cylinder main shaft is parallel to the axis of the cylinder main shaft.

6. The large tile air cooled ball mill of claim 4, wherein: the refrigeration system is characterized by further comprising a heat exchanger, wherein the heat exchanger and the circulating pump form a refrigeration system for cooling oil in the refrigeration system.

7. The large tile air cooled ball mill of claim 1, wherein: the air inlet part of the big tile cover is provided with more than 2 nozzles, and the more than 2 nozzles are uniformly arranged along the extension direction of the axis of the main shaft of the cylinder body; wind enters the tile cavity after entering the nozzle through the air inlet part and is sprayed towards the direction of the cylinder main shaft, and the wind can blow off oil on the outer wall surface of the cylinder main shaft to form an oil blowing-off area.

8. The large tile air cooled ball mill of claim 7, wherein: the cylinder main shaft both sides all dispose and blow off fluid region, and, the crossing position of one deck fluid curtain and main shaft outer wall surface is located and blows off fluid region top in order to drench fluid again on rotatory main shaft outer wall surface blows off fluid region.

Technical Field

The invention relates to a crushing and grinding technology for mines, in particular to the technical field of cylindrical grinding mills, and particularly relates to a large-tile air-cooled ball mill.

Background

The raw material process is one of the main processes of the alumina production system, and is provided with a plurality of groups of ball mills, and mainly the qualified ore pulp which is ground out is sent to the dissolution operation.

The mill is a large-scale heavy-load rotating device, weighs about 300 tons in a working state, and is supported by sliding bearings (hereinafter called large tiles) arranged at two ends of a cylinder body. The heat productivity is large during the operation, and the equipment main engine plant is provided with a lubricating oil station for lubricating and cooling large tile temperature. And the original cooling mode of the big tile is also a circular pipe water cooling mode, and the circular pipe is embedded in the Baylalloy big tile. This cooling method has the following problems: the pipe diameter of the designed ring pipe is only 15mm, and the quality of tap water used by a factory is not softened, so that the ring pipe is easy to scale and cause blockage, and cannot be dredged, and the water cooling device is completely ineffective. Although the cooling is carried out by the lubricating oil, a large amount of heat still exists in the large tile cover and cannot be dissipated. The average jumping and stopping times of the mill reach 4 times per month because the temperature of the big tiles reaches the maximum set value and the temperature of the big tiles reaches 65 ℃, particularly, the frequent jumping, stopping, starting and stopping of the mill are more frequent in summer, so that stable ore blending cannot be realized, the index fluctuation is large, and the normal production is seriously influenced.

Disclosure of Invention

The invention aims to solve the problems and provide the large-tile air-cooled ball mill which adopts a new cooling technology and is mainly applied to air-cooling treatment of the large-tile hollow shaft at the inlet end and the outlet end of the mill, so that the temperature of the large tiles and the main shaft can be effectively reduced, and the effect of long-time stable operation of the mill is achieved.

In order to achieve the purpose, the technical scheme adopted by the invention is as follows:

a big tile air-cooled ball mill comprises a frame and a ball mill body arranged on the frame, wherein the ball mill body comprises a cylinder, a bearing assembly, a transmission assembly, a driving motor and an air cooling device; the air cooling device comprises an air supply mechanism and a ventilation pipe, air inlet parts communicated with the tile cavities are respectively arranged on two sides of the lower part of the large tile cover, air outlet parts communicated with the tile cavities are arranged on the upper part of the large tile cover, and the air supply mechanism is connected to the air inlet parts through the ventilation pipe; the air supply mechanism is operated to supply air to the tile cavity, and the air is blown towards the main shaft direction of the cylinder body through the air inlet part.

As an option, still include the clarifier, it sets up in the air inlet side of air supply mechanism to filter and purify the inlet air. As an option, the air supply mechanism is a fan for delivering natural air or an air conditioning system for delivering cold air. So, can realize carrying out filtration purification to the heat dissipation and to the wind of tile chamber air supply, still can be based on air conditioning system and cool down output cold wind in order to strengthen the radiating effect.

As an option, the oil film heat dissipation device comprises an oil injection part, a circulating pipe and a circulating pump, wherein the oil injection part is arranged at the top of the tile cavity of the large tile cover, the inlet end of the circulating pump is connected to an oil liquid pool at the bottom of the tile cavity through the circulating pipe, and the outlet end of the circulating pump is connected to the inlet end of the oil injection part through the circulating pipe; the circulating pump is operated to convey oil to the oil injection piece, and the outlet end of the oil injection piece outputs a plurality of layers of curtain-shaped oil. Therefore, the heat exchange area of the oil liquid level is increased, and the heat exchange and cooling effects are improved; the oil temperature can be reduced when the gas is at a lower temperature than the oil, and the gas temperature can be reduced when the gas is at a higher temperature than the oil.

Preferably, the oil output by the oil injection piece falls on the outer wall surface of the cylinder main shaft, and the intersecting line of the surface of the oil curtain and the outer wall surface of the cylinder main shaft is parallel to the axis of the cylinder main shaft. Liquid spraying points are uniformly distributed along the axis of the main shaft, so that the main shaft can be uniformly cooled.

As an option, the system also comprises a heat exchanger, and the heat exchanger and the circulating pump form a refrigerating system for cooling oil in the refrigerating system.

As an option, the air inlet part of the large tile cover is provided with more than 2 nozzles, and the more than 2 nozzles are uniformly arranged along the extension direction of the axis of the main shaft of the cylinder body; wind enters the tile cavity after entering the nozzle through the air inlet part and is sprayed towards the direction of the cylinder main shaft, and the wind can blow off oil on the outer wall surface of the cylinder main shaft to form an oil blowing-off area. Preferably, the two sides of the main shaft of the cylinder are provided with oil blowing-off areas, and the intersection position of the oil curtain and the outer wall surface of the main shaft is positioned above the oil blowing-off areas so as to spray oil on the rotating outer wall surface of the main shaft again to blow off the oil areas. Therefore, high-temperature oil on the outer wall surface of the main shaft can be blown off, so that the outer wall surface of the main shaft is in direct contact with the low-temperature oil, and the heat exchange efficiency is enhanced.

Due to the adoption of the technical scheme, the invention has the following beneficial effects:

1. the invention discloses an air cooling device arranged on a large tile cover, which has the principle that normal temperature air or cooling cold air is forced to enter a main shaft and a large tile cavity through an air inlet, so that the heat exchange contact area of the cold air with a large tile, a large tile seat and oil is increased, and hot air is forced to be discharged, so that the temperature of a large tile closed space is reduced, and the purpose of cooling the large tile is achieved.

2. According to the invention, an oil feeding mode is changed into a multilayer film shape, so that the heat exchange area can be increased by about 5 times, the cooling effect is outstanding, and the temperature can be reduced by about 15 ℃ on a same scale.

Drawings

Fig. 1 is a schematic structural view of the present invention.

FIG. 2 is a schematic view of the internal structure of the large tile cover of the present invention.

FIG. 3 is a schematic cross-sectional view of the large tile shroud of the present invention.

In the attached figure, 1-a feeder, 2-a feeding end, 21-a discharging end, 3-a big tile cover I, 31-a big tile cover II, 4-a barrel, 41-a main shaft, 5-a big gear, 6-a small gear, 7-a reducer, 8-a coupling, 9-a driving motor, 10-an air cooling device, 11-a big tile, 111-a big tile seat, 101-an air inlet part, 102-an air outlet part, 200-an oil curtain and 201-an oil pool liquid level.

Detailed Description

The following further describes the embodiments of the present invention with reference to the drawings.