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After the steam from the boiler enters the steam turbine, it passes through a series of annular nozzles and moving vanes to convert the heat energy of the steam into the mechanical energy of the rotation of the steam turbine rotor. Steam in the steam turbine, energy conversion in different ways, it constitutes a steam turbine with different working principles. Level:
A stage consisting of a row of nozzles followed by a row of moving vanes. Single-stage steam turbine: A multi-stage steam turbine consisting of only one stage:
Steam turbine impulse steam turbine composed of multiple stages: expansion in the nozzle, work in the moving vane reaction steam turbine: expansion of 50% in the nozzle and moving vane, the structure of the steam turbine cylinder The cylinder is the shell of the steam turbine, and its function is to separate the flow part of the steam turbine from the atmosphere to form a closed steam chamber to ensure that the steam completes the energy conversion process inside the steam turbine, and the nozzle chamber, partition plate, partition sleeve and other parts are installed in the cylinder; The outside of the cylinder is connected to the intake, exhaust, and extraction pipes.
The high and medium pressure sections of the cylinder are generally made of alloy steel or carbon steel casting structure, and the low pressure section can adopt a cast structure or a welded structure welded by simple castings, section steel and steel plates according to the capacity and structural requirements. There are two types of high-pressure cylinders: single-layer cylinders and double-layer cylinders. Single-deck cylinders are mostly used in steam turbines with medium and low parameters.
Double-deck cylinders are suitable for steam turbines with relatively high parameters. It is divided into high-pressure inner cylinder and high-pressure external cylinder. The high-pressure inner cylinder is separated by the horizontal middle plane to form the upper and lower cylinders, and the inner cylinder is supported on the horizontal middle plane of the outer cylinder.
The high-pressure outer cylinder is supported on the front bearing housing by a total of four cat's paws at the front and rear. The cat's claw is cast together from the lower cylinder and is located in the upper part of the lower cylinder, so that the bearing point is kept on the horizontal centerline. The medium-pressure cylinder consists of a medium-pressure inner cylinder and a medium-pressure external cylinder.
The medium-pressure inner cylinder is separated on the horizontal mid-plane to form the upper and lower cylinders, and the inner cylinder is supported on the horizontal mid-plane of the outer cylinder, and an outer boss that is processed on the outer cylinder and an annular groove on the inner cylinder are used to cooperate with each other to keep the position of the inner cylinder in the axial direction. The medium-pressure outer cylinder is separated by the horizontal middle plane to form the upper and lower cylinders. The medium-pressure outer cylinder is also supported on the front and rear pairs of cat's paws on the medium bearing box and the front bearing box of the No. 1 low-pressure cylinder.
The low-pressure cylinder is a reverse shunt type, and each low-pressure cylinder is composed of an outer cylinder and two inner cylinders, all of which are welded by plates. The upper and lower halves of the cylinder are divided into three parts vertically, but when installed, the vertical joint surface of the upper cylinder has been bolted together, so the upper half of the cylinder can be lifted as a single part. The low-pressure outer cylinder is supported by a skirt platen, which is integrated with the lower half of the cylinder and extends to both ends along the lower half of the cylinder.
The low-pressure inner cylinder is supported on the outer cylinder. Each skirt table is mounted separately on a foundation table that is fixed to the foundation by grouting. The position of the low-pressure cylinder is fixed by a sliding pin between the skirt and the foundation plate.
The rotor rotor is machined from alloy steel forgings as a whole. At the end of the high-pressure rotor governor, a rigid coupling is connected with a long shaft, and the upper shaft of this section is equipped with a main oil pump and an overspeed trip mechanism. All rotors are finished and, after all blades are fitted, are subjected to full-speed rotation tests and precise balancing.
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Hello, without installing the air filter, even the system can not be used, the ink from the external bottle can not enter the ink cartridge, resulting in the inability to print, you can go to the Deze consumables franchise store for details.
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Attention should be paid to the installation and sealing of the high-efficiency filter, and the sealing methods include contact packing sealing, liquid tank knife edge sealing and negative pressure leakage sealing.
3. Atlas of relevant standards.
07K505 "Design and Installation of Clean Operating Departments and Medical Gases".
Fourth, the implementation of standards.
Product standards. GB-T13554-2008
GB T6165-2008 "Performance Test Method for High Efficiency Air Filter - Transmittance and Resistance".
Engineering standards. GB50073-2013 "Code for Design of Clean Workshop".
GB50333-2013 "Technical Code for the Construction of Clean Operating Departments in Hospitals" Table 1
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