This month's contest prize is a 1/43 scale R32 GT-R model by Kyoho and a copy of latest issue of Option Magazine, a JDM publication on the latest automotive styling here in Japan!
Submit a JDM car picture in response to this post, the one to get the most likes will be posted here and contacted by our staff to deliver the contest prize.
The winner will be selected Friday December 22nd, Japan Time (+9)
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If there are problems during the operation of the submersible stainless steel sewage pump, they can be handled in this way
During the use of submersible stainless steel sewage pumps, there are often problems such as improper equipment operation. Therefore, the equipment may malfunction after a period of use. In order to facilitate equipment operators in analyzing and resolving faults, the common faults of submersible stainless steel sewage pumps will be sorted and analyzed below.
（1） The sewage pump cannot be started
One situation is that after closing, the motor does not rotate and there is no sound. This indicates that the circuit is not working. At this point, it is necessary to check whether the power circuit is open and whether the fuse is blown. If there is no abnormality, it may be due to the motor stator winding being burnt out. It should be removed and replaced to replace the wire.
Another situation is that the motor does not rotate and is accompanied by a "buzzing" sound after closing. In this case, the machine should be immediately shut down for inspection. The reason is that there is a phase failure in the power line or stator winding, resulting in phase failure operation. The voltage is too low, which may be caused by low power supply voltage, long cables with small cross-section, small transformer capacity, and should be checked one by one. There are foreign objects in the pump body, bearings are damaged and stuck, and phenomena such as "shaft wrapping" and "seizure" occur. At this time, the water pump should be inspected and cleaned.
（2） After the sewage pump is started, there is no water output, and there is little or indirect water output
The causes of the malfunction include: 1. The overflow parts such as the water filter, water delivery pipe, and guide shell are severely blocked or the water delivery pipe is broken. At this point, there is often an increase in the reading of the ammeter and violent oscillation of the pointer. Immediately stop the machine for inspection and cleaning. 2. The motor operates normally but the water output is low. The reason is that the water pump configuration is unreasonable, and the actual head exceeds the rated head of the water pump by too much, requiring the replacement of a higher head water pump. It is also possible that the water pump is reversed, simply adjust any two of the outgoing lines relative to each other. If the sealing ring or impeller is excessively worn, it should be removed and replaced in a timely manner. 3. The motor operates normally but does not produce water. The main reason is that the dynamic water level drops too much during the pumping process. The valves in the water delivery pipe can be reduced or the water pump can be lowered to half a meter below the dynamic water level.
（3） The sewage pump unit rotates violently, vibrates heavily, and has high noise
The reasons for this are:
The guide bearing of the water pump is worn, and the shaft swings inside the bearing, or the shaft bending causes eccentric wear. At this time, the degree of the ammeter increases, the pointer swings violently, and the unit vibrates. The machine should be immediately stopped to replace the guide bearing or straighten the shaft.
The fastening bolts of the impeller are loose, causing collision and friction between the impeller and the guide shell, causing vibration of the pump body. The water pump should be lifted out and the bolts should be tightened.
The wear of the thrust bearing causes friction between the front baffle of the impeller and the guide pipe, and the ammeter pointer swings violently. If there is a noticeable friction sound, the thrust bearing should be replaced immediately. When the impeller is severely worn, the impeller should also be replaced. The balance between the motor rotor and the rotating part of the pump itself is not qualified, which causes vibration of the unit during rotation. The motor rotor and water pump impeller should be removed for action and static balance testing to achieve a balanced state.
The above are the common faults and solutions of submersible stainless steel sewage pumps. Only by familiarizing users with these coping methods can they better and more timely handle these problems.
https://www.evpvacuum.com/what-are-the-principles-of-using-a-vacuum-pump-silencer.html
If there are problems during the operation of the submersible stainless steel sewage pump, they can be handled in this way
During the use of submersible stainless steel sewage pumps, there are often problems such as improper equipment operation. Therefore, the equipment may malfunction after a period of use. In order to facilitate equipment operators in analyzing and resolving faults, the common faults of submersible stainless steel sewage pumps will be sorted and analyzed below.
（1） The sewage pump cannot be started
One situation is that after closing, the motor does not rotate and there is no sound. This indicates that the circuit is not working. At this point, it is necessary to check whether the power circuit is open and whether the fuse is blown. If there is no abnormality, it may be due to the motor stator winding being burnt out. It should be removed and replaced to replace the wire.
Another situation is that the motor does not rotate and is accompanied by a "buzzing" sound after closing. In this case, the machine should be immediately shut down for inspection. The reason is that there is a phase failure in the power line or stator winding, resulting in phase failure operation. The voltage is too low, which may be caused by low power supply voltage, long cables with small cross-section, small transformer capacity, and should be checked one by one. There are foreign objects in the pump body, bearings are damaged and stuck, and phenomena such as "shaft wrapping" and "seizure" occur. At this time, the water pump should be inspected and cleaned.
（2） After the sewage pump is started, there is no water output, and there is little or indirect water output
The causes of the malfunction include: 1. The overflow parts such as the water filter, water delivery pipe, and guide shell are severely blocked or the water delivery pipe is broken. At this point, there is often an increase in the reading of the ammeter and violent oscillation of the pointer. Immediately stop the machine for inspection and cleaning. 2. The motor operates normally but the water output is low. The reason is that the water pump configuration is unreasonable, and the actual head exceeds the rated head of the water pump by too much, requiring the replacement of a higher head water pump. It is also possible that the water pump is reversed, simply adjust any two of the outgoing lines relative to each other. If the sealing ring or impeller is excessively worn, it should be removed and replaced in a timely manner. 3. The motor operates normally but does not produce water. The main reason is that the dynamic water level drops too much during the pumping process. The valves in the water delivery pipe can be reduced or the water pump can be lowered to half a meter below the dynamic water level.
（3） The sewage pump unit rotates violently, vibrates heavily, and has high noise
The reasons for this are:
The guide bearing of the water pump is worn, and the shaft swings inside the bearing, or the shaft bending causes eccentric wear. At this time, the degree of the ammeter increases, the pointer swings violently, and the unit vibrates. The machine should be immediately stopped to replace the guide bearing or straighten the shaft.
The fastening bolts of the impeller are loose, causing collision and friction between the impeller and the guide shell, causing vibration of the pump body. The water pump should be lifted out and the bolts should be tightened.
The wear of the thrust bearing causes friction between the front baffle of the impeller and the guide pipe, and the ammeter pointer swings violently. If there is a noticeable friction sound, the thrust bearing should be replaced immediately. When the impeller is severely worn, the impeller should also be replaced. The balance between the motor rotor and the rotating part of the pump itself is not qualified, which causes vibration of the unit during rotation. The motor rotor and water pump impeller should be removed for action and static balance testing to achieve a balanced state.
The above are the common faults and solutions of submersible stainless steel sewage pumps. Only by familiarizing users with these coping methods can they better and more timely handle these problems.
https://www.evpvacuum.com/what-are-the-principles-of-using-a-vacuum-pump-silencer.html
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