Specifications

Double shaft for air lock series
Max 5 air locks with one reducer
Fit for large flour mills
Good air sealing
High efficiency

Brief Instruction of Air lock device

Air lock device is an important device for pneumatic conveying and dust removal. The main usage of air lock is to timely and constantly unload the material from discharger or dust collector, and to prevent the outside air from entering the discharger or dust collector. Air lock device can handle materials in powder, pellet, flake shapes and also fiber materials. And at the same time, air lock device is widely used in rice milling, powder, animal feed, machinery, chemical engineering, medicine, tobacco, metallurgy and cement making, dust removal and many other industries.

Structure and Working principle of Air Lock device

This air lock device  is a kind of improved impeller open type air lock device. It is a discharging machine structured with impeller, bearing, oil seal, air lock shell, end cover and other spare parts. On the top of the air lock device  there is flange connected with the unload opening of discharger to receive the material from discharger, and then unload material from the bottom of air lock device  while impeller rotating. The impeller is open type, which can prevent material from blocking as well as reduce air lock weight and shape.

 

 

Model Selection for Air Lock device  and Using Form

 

Model selection basis for air lock device:

 

1. Material granularity (powder or granule);

 

2. Material viscosity(water or other liquids included);

 

3. Material pH value(may select common material or stainless steel with different properties);

 

4. Material temperature(select external type air lock above 60°C);

 

5. Material handling capacity(Theoretical calculation of volume×1.2).

 

Using form for air lock device:

 

Independent work by single air lock device( transmission by belt, chain or direct coupling), multi-machine series and in parallel. No more than 5 air lock  devices in one unit when working by multi-machine in series or in parallel. The length of tandem shaft coupling and the height of bracket can be decided by users.

 

Installation and Use for Air Lock device

 

Before installation air lock device must be carefully examined to make sure the impeller rotates flexibly and that relevant connecting parts reliable and correct. Then fix the air lock  device on the floor or the bracket. Add full oil according to the using instructions if there is a reducer (3# Lithium-based lubricant). If a combination of air lock devices are used, there must be overload and short-circuit protection devices in order to prevent the damage of motor.

 

Before feeding, air lock device  with separate power must be turned on before host machine, while air lock device  without separate power should be turned on with host machine at the same time. And air lock device  should be shut down after discharging of raw material.

 

Always pay attention to the observing window to see whether material flow is normal or not while running the air lock  device. Timely treatment if accumulation.

 

Daily Maintenance and Repair for Air Lock device

 

1. Lubrication

 

While installation of reducer for air lock device  driving, the added lubricant should be fully unloaded one month later and add the new lubricant. Regular check for oil level keep. Lubrication for air lock device  bearings can be done when equipment maintenance.

 

2. Lutation

 

Both ends of the viewing window of air lock  device are U type rubber sealing rings, and they should be replaced immediately if damaged.

 

Oil seal is for the lutation of impeller shaft and end cover, which should be always checked. It should be replaced immediately if damage, otherwise the material will enter into the rolling bearing and thus cause bearing damage. Users are advised to choose air lock device with double oil seal and discharge opening.

 

Lutation between impeller and air lock shell is the key point of air lock device. If the other place does not leak but material accumulation happens, it is mostly because of the abrasion between the impeller outer diameter and the inside holes of the device shell. In this caseusers shouldreplace immediately.

 

3. Teardown and Maintenance      

 

Correct methods for air lock device  teardown:

 

1. Tear down by bolt;

 

2. Tear down by hammer. Remember to put copper bar or wood blocks on spindle head or end cover when teardown.

When replacing, first clean the end cover, then fit the machine with the same specifications of the oil seal and bearing. There must be full lubricating oil.