Đang tải...

Tài liệu đào tạo Centrifugal Compressor (Máy nén ly tâm)

Thảo luận trong 'Các vấn đề về thủy lực & ứng dụng' bắt đầu bởi hochoi, 27/1/10.

Thành viên đang xem bài viết (Users: 0, Guests: 0)

  1. hochoi
    Offline

    Tài xế O-H
    Expand Collapse

    Tham gia ngày:
    16/7/09
    Số km:
    2,544
    Được đổ xăng:
    111
    Mã lực:
    401
    Xăng dự trữ:
    646 lít xăng
    Introduction
    Air compressors of various designs are used widely throughout DOE facilities in numerous applications. Compressed air has numerous uses throughout a facility including the operation of equipment and portable tools. Three types of designs include reciprocating, rotary, and centrifugal air compressors.

    Centrifugal Compressors
    The centrifugal compressor, originally
    built to handle only large volumes of low
    pressure gas and air (maximum of 40
    psig), has been developed to enable it to
    move large volumes of gas with discharge
    pressures up to 3,500 psig. However,
    centrifugal compressors are now most
    frequently used for medium volume and
    medium pressure air delivery. One
    advantage of a centrifugal pump is the
    smooth discharge of the compressed air.

    The centrifugal force utilized by the
    centrifugal compressor is the same force
    utilized by the centrifugal pump. The air
    particles enter the eye of the impeller,
    designated D in Figure 6. As the impeller rotates, air is thrown against the casing of the compressor. The air
    becomes compressed as more and more air is thrown out to the casing by the impeller blades.

    The air is pushed along the path designated A, B, and C in Figure 6. The pressure of the air is increased as it is pushed along this path. Note in Figure 6 that the impeller blades curve forward, which is opposite to the backward curve used in typical centrifugal liquid pumps.

    Centrifugal compressors can use a variety of blade orientation including both forward and backward curves as well as other designs.

    There may be several stages to a centrifugal air compressor, as in the centrifugal pump, and the result would be the same; a higher pressure would be produced. The air compressor is used to create compressed or high pressure air for a variety of uses.

    Some of its uses are pneumatic control devices, pneumatic sensors, pneumatic valve operators, pneumatic motors, and starting air for diesel engines.
     

Chia sẻ trang này