| 摘要 |
This invention relates to a blower of a centrifugal turbomachine type for producing fluid pressure from mechanical energy. The invention relates to the guide vane rows or vaned diffuser used in centrifugal blowers. The vaned diffuser is located downstream by the impeller. The impellers of the centrifugal blowers can have blades which are backwardly curved, radially ending or forwardly curved. Each of these impellers can have a vaned or vaneless diffusing system following the impeller. During operation of the impeller blades at the design point, the average outlet relative velocity is equal to or greater than 0.6 times the inlet relative velocity at the hub of the impeller portion of the impeller blades and the angle of flow deflection within the impeller blades is at least equal to approximately 50 DEG or more. The centrifugal turbomachine also includes a series of guide vane rows, each of said guide vane rows, including at least a forward row of blades and an aft row of blades. The chord of each of the blades in the aft row is greater than the chord of each of the blades in the forward row and each blade in the aft row cooperates with the corresponding blade in the forward row to form, during operation of the centrifugal turbomachine, multiple rows of blades. The pressure coefficient for each centrifugal blower stage is greater than approximately 1.1.
|
