As is well-known to all, blast turbine is the most critical part of shot blasting machine and regarded as the heart of the shot blasting machine, because the quality, number, power and layout of the blast turbines directly determine the production capacity and blasting effects of the shot blasting machine.
1. Basic structure of blast turbine
The blast turbines of our shot blasting machine adopt cantilever centrifugal type, is mainly composed of the impeller, main shaft and main bearing seat, cover, distributor, control cage, blades, guard plate, transmission device, motor, bearing, etc.
Each unit of blast turbine produced by Qinggong Machinery has undergone the strict test and measurement control to ensure high quality, large abrasive flow volume and high blasting speed.
2. Working principle of blast turbine
The steel shots enter into the distributor of blast turbine through the abrasive control system, the distributor evenly distribute the steel shots into the control cage.
Then the steel shots enter into the high-speed rotation impeller driven by a motor, under the action of centrifugal force, the steel shots are accelerated outwards along the blades.
The accelerated steel shots are projected to the surface of workpieces at a high speed, the surface of workpieces is impacted and scraped to remove the impurities or rust on the surface.
The impurities and steel shots are sent back to the separator through the abrasive recycling system(including screw conveyor, bucket elevator). The air wash separator separates the steel shots from the impurities and dust, and the qualified steel shots enter the storage hopper again for recycling.
3. Advantages of our blast turbine/wheel
The blast turbines developed by Qinggong Machinery has the advantages as follows:
l Our blast turbines adopt the advanced technology, compared to the old blast turbines, not only improve the efficiency by 20%, but also save consumption by 20%.
l Our blast turbine has large abrasive flow rate, large blasting area and uniform distribution.
l The impeller body is made of 40#Cr and processed in one go using a high-precision CNC machining center which contribute to the balance under high speed operation, low vibration, low noise and long service life.
l The blades are easy to assembled and disassembled: Because the blades of this blast turbine are inserted from the center of the impeller, and the blades are fixed by centrifugal force during the rotation of the impeller, without clamping tools. The blades can be easily removed from the end. It only takes 5-10 minutes to disassemble 8 blades, also it’s very easy to check the condition of control cage and distributor
l The material for blades, distributor and control cage are high chrome wear resistant cast iron, after hardening treatment, conductive to longer service life.
l All the blades are strictly trimmed and polished after casting, and weighted pair by a balance to ensure that the blast turbines have a good dynamic balance performance.
4. Troubleshooting
Q1：Blast turbine vibrates heavily
A1.1: The blades are seriously worn and the operation is unbalanced. Replace the blades symmetrically according to the weight.
A1.2：The impeller body is seriously worn and appears weight unbalance. Replace the impeller body as soon as possible.
A1.3: The fixing bolts of the blast turbine are loose, tighten the bolts.
Q2: Blast turbine makes abnormal noise
A2.1: The steel shots does not meet the requirements, causing sand jam. Replace the qualified steel shots.
A2.2: There are large foreign objects in the abrasive, check and remove it.
A2.3: The guard plate of the blast turbine is loose and rubs against the impeller or impeller blades. Adjust the guard plate.
Q3: Abrasive flow volume is uneven
A3.1: Check if there is sufficient steel shots in the abrasive storage hopper
A3.2: Adjust the flow volume of each abrasive dosing unit
A3.3: Adjust the gap of the falling sand regulating plate of the separator to make the flow curtain uniform
Our technical team will design the layout of the blasting chamber and blast turbines through three-dimensional simulation projection to ensure the perfect blasting effects and high productivity according to your workpieces and production requirements.
So if you are interested in the shot blasting machines, please feel free to send us an enquiry, our well-trained sales and technical team is always at your service.
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