TGFZ series Rotary Air Lock

Wearable, anti-stuck, inserted blade type Fit for pellet, powder, ultrafine powder discharging New design, reliable structure

Brief Instruction of Rotary Air lock

Rotary air lock is an important device for pneumatic conveying and dust removal. The main usage of rotary 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. Rotary air lock can handle materials in powder, pellet, flake shapes and also fiber materials. And at the same time, rotary air lock 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 Rotary Air Lock

This rotary air lock is a kind of improved impeller open type rotary air lock. 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 rotary air lock there is flange connected with the unload opening of discharger to receive the material from discharger, and then unload material from the bottom of rotary air lock while impeller rotating. The impeller is open type, which can prevent material from blocking as well as reduce rotary air lock weight and shape.

Model Selection for Rotary Air Lock and Using Form

Model selection basis for rotary air lock:

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 rotary air lock if above 60°C);

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

Using form for rotary air lock:

Independent work by single rotary air lock ( transmission by belt, chain or direct coupling), multi-machine series and in parallel. No more than 5 rotary air locks 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 Rotary Air Lock

Before installation rotary air lock must be carefully examined to make sure the impeller rotates flexibly and that relevant connecting parts reliable and correct. Then fix the rotary air lock 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 rotary air locks is used, there must be overload and short-circuit protection devices in order to prevent the damage of motor.

Before feeding, rotary air lock with separate power must be turned on before host machine, while rotary air lock without separate power should be turned on with host machine at the same time. And rotary air lock 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 rotary air lock. Timely treatment if accumulation.

Daily Maintenance and Repair for Rotary Air Lock

1. Lubrication

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

2. Lutation

Both ends of the viewing window of rotary air lock 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 rotary air lock with double oil seal and discharge opening.

Lutation between impeller and air lock shell is the key point of rotary air lock. 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 rotary air lock 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.

TGFZ series Rotary Air Lock