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Relevant performance characteristics of diesel engine fire pump

Diesel engine fire pumps can be used to transport clear water below 80°C without solid particles or liquids with physical and chemical properties similar to water. On the premise of meeting the fire protection conditions, the requirements of the living and production water supply conditions are taken into account. The products can be used not only in independent fire water supply systems, but also in fire protection and domestic shared water supply systems, as well as in construction, municipal, industrial and mining, water supply and drainage, ships, field operations and other occasions.

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Diesel engine fire pumps used for fire fighting purposes are relatively strict. Generally, two sets of batteries are equipped with double backup to ensure the normal operation of diesel engine fire pumps. When the controller can run normally, it will send a signal to the starter motor. There are also two types of starter motors, one is manual and the other is automatic.
If the starter motor can operate normally, then feed back a signal to the controller, and then the controller sends a signal to the speed control board, and the speed control board controls the throttle driver to supply oil to the oil pump. After entering the oil, the air is compressed and the diesel is burned to do work, so that the diesel engine starts to do work to start.
The connection between the diesel engine and the water pump is somewhat different from the traditional one, which uses a clutch. Why use a clutch, because when the water pump is empty, it needs a lot of force to drive it, and the function of the clutch is to share the two, first start the diesel engine, the diesel engine is running, and then the water pump is sucked in through the clutch, Drive the operation of the water pump. But the problem is that the use of the clutch is very inconvenient for maintenance, and the clutch does not have an oil lubrication system, so the damage is relatively serious.

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    First, what’s a water pump? It’s a device used to transport liquid, pressurize the liquid, and make the liquid from the first liquid position to the high liquid position. The first water pump constructed by the Chinese is called” water windmill”. latterly, around 300 BC, the emergence of the” Archimedes screw pump” is more analogous to ultramodern pumps. In addition, the following introductory knowledge points are what you must understand.
    1. Centrifugal pump

    Centrifugal pump is the most common type of pump. In simple terms, the working principle of centrifugal pump is to rotate the impeller to drive the liquid under the action of centrifugal force. The liquid leaves the impeller and enters the volute. As the inflow passage of the volute gradationally expands, the fluid haste slows down, and the pressure rises continuously, and eventually it’s discharged through the conduit.
    2. Impeller
    The impeller is one of the main factors in the water pump, and it’s the core element that transmits mechanical energy to the liquid. The impeller is substantially divided into three types open type,semi-open type and closed type. The material conditions for the impeller are high, wear resistance is needed, and the manufacturing process is good.

    3. Cavitation

    Cavitation is the conformation of numerous bitsy recesses when the liquid connections the liquid under high- speed inflow and pressure, and gradationally expands into grottoes when serious, and cavitation frequently occurs in the impeller and pump covering.