How often is the impeller replaced? Aerator maintenance cycle list

How often is the impeller replaced? Aerator maintenance cycle list

The impeller is the core component of the aerator, which directly affects the aerator efficiency and equipment life. Many farmers are confused about the replacement cycle of the impeller. This article provides you with a detailed answer to the impeller replacement and aerator maintenance cycle in the form of questions and answers to help you manage the equipment scientifically and reduce the failure rate.

1. How often is the impeller changed?

There is no fixed standard for the replacement cycle of the impeller, which mainly depends on the material, the use environment, water quality and daily maintenance. Usually, under normal use and regular maintenance, the service life of the impeller is 2-3 years. However, if the water quality is highly corrosive, the sediment content is high or it is often overloaded, the service life may be shortened to 1 year.

It is recommended to check the impeller wear every quarter to see if the blades are deformed, cracked or severely rusted. If the blade thickness is reduced by 1/3 or there is a significant gap, it should be replaced immediately, otherwise it will affect the oxygenation efficiency and even damage the motor.

2. How to determine if the impeller needs to be replaced?

When the aerator exhibits the following phenomena, it may indicate that the impeller is worn: the aerating capacity decreases significantly, the water surface tumbling weakens; the operating noise increases, and abnormal vibration occurs; the ammeter reading increases (the load increases due to the imbalance of the impeller).

In addition, regular disassembly and inspection is the most intuitive. If the surface of the impeller has deep pits, pits or thin edges, it is recommended to replace it in time. Do not wait until the impeller is broken before dealing with it, so as not to damage the pontoon or hurt fish and shrimp.

3. What items are included in the daily maintenance of the aerator?

The core of daily maintenance is cleaning, lubrication and fastening. Specific items include: weekly cleaning of entanglements on the impeller (such as aquatic plants, plastic bags); checking whether there is any leakage on the pontoon; checking whether the cable is damaged; adding grease to the bearing every month (3-5 times with the grease gun); checking the oil level of the gearbox and replenishing the gear oil when it is insufficient.

In addition, the impeller and protective cover should be rinsed after each use to avoid residue corrosion. Long-term outage (such as winter) requires lifting the aerator and storing it in a dry place, and emptying the oil in the gearbox (if it is oil-immersed).

4. How often is the gear oil of the aerator changed?

Gear oil (gearbox oil) is recommended to be replaced every 500 hours of operation or every 6 months. If the water quality is bad and there is a lot of dust, it can be shortened to 3 months. When replacing, use the model recommended by the manufacturer (mostly L-CKC 220 or 320 industrial gear oil), and add the oil volume to the middle of the oil level line.

To determine whether the oil has deteriorated, the oil sample can be observed: if it is milky white (water ingress) or sticky and black (overheating), the oil seal should be replaced immediately and checked. Long-term failure to change oil will lead to increased gear wear, abnormal noise and shortened life.

5. How to maintain the bearings of the aerator?

Bearings are high-speed running parts, and improper maintenance is easy to overheat and burn. It is recommended to add lithium-based grease (butter) every two weeks. The amount of filling should be 1/3 to 1/2 of the volume of the bearing cavity. Too much will cause heat.

If there is obvious noise or vibration of the bearing, it should be stopped for inspection and replaced if necessary. When replacing the bearing, pay attention to the selection of sealed bearings (such as ZZ type) and apply anti-rust oil. Keep the bearing seat clean every day to avoid sediment entering.

6. What maintenance is required for the aerator motor?

Key points of motor maintenance: maintain good ventilation and heat dissipation, and regularly remove dust from the shell; check whether the terminals are loose to prevent poor contact and heat generation; measure the insulation resistance, measure it with a megohm meter every six months, it should be greater than 50 trillion euros, and if it is smaller than this value, it needs to be dried.

It is essential to waterproof the motor, and the aging sealing ring at the junction box should be replaced in time. If the motor enters water, it should be stopped immediately for dismantling and repair, otherwise the windings will be burned. When not in use for a long time, it should be run without load for a few minutes regularly to drive moisture.

7. How to maintain the aerator in rainy season or humid environment?

In the rainy season, the air humidity is high, so it is necessary to pay more attention to electrical safety. Check whether the leakage protector is sensitive before each use; the cable connector must be wrapped with waterproof tape and treated overhead to avoid soaking in water.

Oxygen housing can be coated with anti-rust paint or anti-rust oil, especially for bolts and flanges. Dry the surface of the motor in time after rain and check for water marks. In case of thunderstorm, it is recommended to suspend use and disconnect the power supply.

8. How should the aerator be stored when it is out of service for a long time?

Before deactivation, thorough maintenance is required: clean the impeller and fuselage, dry them and apply anti-rust oil; put the gear oil in the gearbox and inject new oil into the full position (to prevent internal rust); remove the motor and seal it with a plastic bag and store it in a dry and ventilated place.

The pontoon should be drained of internal water and stored upside down. Before restarting, check whether the components are normal, fill with grease and gear oil, and test the motor insulation. It is recommended to start running for 10 minutes every 2-3 months to maintain mechanical properties.

9. Aerator maintenance schedule (reference)

The above cycle is a general recommendation. For details, please refer to the product manual and combine the actual use conditions. Good maintenance habits can significantly prolong the life of the aerator and ensure the benefits of breeding.