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The main performance parameters of the centrifugal pump as follows: 1.    Flow Flow is also called displacement, the amount of water raised. It is the amount of liquid discharged by the pump in the unit time, has two representation , one is volume units and the other is weight units. Q expression for volume flow, the unit is m³/s, m³/h, and L/s. G expression for weight flow, the unit is T/h, Kg/s. The relationship between the weight flow and volume flow is G=γ Q （γ=liquid weight, kg/m³） 2.    Head Unit weight liquid through the pump after the energy is commonly known as the lift, also known as the total head or full lift. Expressed in H, the unit is m For high-pressure pumps, sometimes also approximately with the pump outlet and the inlet pressure difference (P2-P1 ) to indicate the head size, at this time the lift of the expression is H=104(P2-P1)/γ P2 —outlet pressure of pump (kg/cm2) P1 —inlet pressure of the pump(kg/cm2) 3.    Speed The rotational speed of the centrifugal pump refers to the number of revolutions per minute of the shaft, expressed in n, the unit is r/min. 4.    Power The power of the centrifugal pump refers to the axial power of the centrifugal pump, that is, the original motive to the pump power, expressed in N, the unit is kw. The product of the pump's weight flow and head is called the effective power of the pump. Expressed in Ne, the unit is kg*m/s. The expression is                 Ne=GH=γQH  The difference between shaft power N and effective power Ne of centrifugal pump is the loss of power in the pump, its size can be measured by efficiency. The efficiency of the centrifugal pump is the ratio between the effective power Ne and the shaft power N, expressed in η,                η=Ne/N 5.    Specific speed

Ford is recalling about 550,000 cars and SUVs in North America to fix a gearshift problem that could cause the vehicles to roll away unexpectedly.

The recall covers certain 2013 through 2016 Fusion sedans and some 2013 and 2014 Escape small SUVs.

Ford says a bushing that attaches the shifter cable to the transmission can fall off. If this happens, the driver could shift into park but the vehicle could be in another gear. That could let the vehicle roll, increasing the risk of injury or crash.

The company says it doesn't know of any crashes or injuries. Ford is advising owners to use the parking brake.

Dealers will replace the shifter bushing at no cost. Owners will be notified by July 30. Parts should be available late this quarter.

Centrifugal pumps are widely used in automobile engines. The basic structure consists of a pump house, a connecting plate or a belt pulley, a water pump shaft and a bearing or shaft bearing, a pump impeller and a water seal, etc., The water pump is the main component of the automobile.     The engine drives the pump bearing and the impeller rotation through the belt pulley, while the pump coolant is driven together by the impeller rotation. Under the action of centrifugal force, the coolant is flung to the edge of the water pump house, which creates a certain pressure and then flows out of the channel or water pipe.     When the coolant is thrown out, the pressure at the center of the impeller is reduced. The coolant in the water tank is sucked into the impeller by the water pipe under the difference pressure between the pump inlet and the impeller center to realize the reciprocating cycle of the cooling liquid.     The grease which should be prevented from the leakage of coolant is used for lubricating on the shaft bearings. The grease leakage should be prevented at the same time. The seals and gaskets are used for preventing leakage of water pump.     If you need the water pump, please contact me [email protected] It’s my pleasure to offer service for you.

Mercedes-Benz and Ford Motor Co. would seem an unlikely couple. But in the American auto market they have used similar strategies to carve out dominant, cash-gushing positions in the industry’s two most lucrative segments: luxury vehicles and large pickup trucks. Both automakers, industry insiders say, have sliced the market so finely with so many different models that few will dare challenge their supremacy.   Click Here to read more!