The automaker Ford Motor Company showed on Tuesday its updated version of the explorer utility vehicle, the new version of the explorer has a new engine, the new high-priced luxury model, and it is the first car with the Ford oval logo . The 2016 explorers will preview the show at this week's auto show and will be available for sale next summer. Its price will be more than 50,000 yuan. Ford Motor Company’s Explorer Utility Vehicle used to be Ford’s best-selling utility vehicle in the United States, but it has lagged behind smaller utility vehicles such as the now-popular Honda CR-V Utility Vehicle, Toyota RAV4 and Chevrolet. Equinox.
Despite this, Ford still sells about 200,000 adventurers each year. Ford Motor Company’s newest 2016 Explorer Multifunctional Vehicle adds new high-end seats. Ford Motor Company executive Jim Farley said he will soon move to Europe. The explorer is a key model because it will be the touchstone for Ford's other off-road vehicles. Moreover, he pointed out that the Ford Motor's first 1991 version of the car entered the market in 1990, and Ford is already worth a lot of money. Ford Motor Company has sold 7 million cars so far.
A reaction turbine is a type of Steam Turbine that works on the principle that the rotor spins, as the name suggests, from a reaction force rather than an impact or impulse force.
In a reaction turbine there are no nozzles to direct the steam like in the impulse turbine.
Instead, the blades that project radially from the outer edge of the rotor are shaped and mounted so that the shape between the blades, created by the cross-section, create the shape of a nozzle. These blades are mounted on the revolving part of the rotor and are called the moving blades.
The fixed blades, which are the same shape as the moving blades, are mounted to the outer casing where the rotor revolves and are set to guide the steam into the moving blades. Below is a simple diagram of reaction turbine blades:
Reaction Turbine Principle:
In the case of reaction turbine, the moving blades of a turbine are shaped in such a way that the steam expands and drops in pressure as it passes through them. As a result of pressure decrease in the moving blade, a reaction force will be produced. This force will make the blades to rotate.
Reaction Turbine Working:
A reaction turbine has rows of fixed blades alternating with rows of moving blades. The steam expands first in the stationary or fixed blades where it gains some velocity as it drops in pressure. Then enters the moving blades where its direction of flow is changed thus producing an impulse force on the moving blades. In addition, however, the steam upon passing through the moving blades, again expands and further drops in pressure giving a reaction force to the blades.
This sequence is repeated as the steam passes through additional rows of fixed and moving blades.
Note that the steam pressure drops across both the fixed and the moving blades while the absolute velocity rises in the fixed blades and drops in the moving blades.
The distinguishing feature of the reaction turbine is the fact that the pressure does drop across the moving blades. In other words, there is a pressure difference between the inlet to the moving blades and the outlet from the moving blades.
Special Aspects of Reaction Turbines
- There is a difference in pressure across the moving blades. The steam will, therefore, tend to leak around the periphery of the blades instead of passing through them. Hence the blade clearances as to maintain as minimum as possible.
- Also, due to the pressure drop across the moving blades, an unbalanced thrust will be developed upon the rotor and some arrangement must be made to balance this.
Reaction Steam Turbine
Shandong Qingneng Power Co., Ltd. , http://www.qnpturbines.com