37. What is the function of
centrifugal pump? How many forms of DP?
Answer: the function of screw pump
press out chamber is to correctly guide the liquid with minimum loss
The next
stage impeller may be led to the outlet pipe, and part of the kinetic energy is
converted into pressure energy at the same time.
There are three common types
of diaphragm pump press out chamber:
(1) Spiral volute is used to collect
liquid gear pump. Kinetic energy becomes pressure energy
It is carried out in
the diffuser.
(2) Radial guide vane, which is fixed outside the impeller
outlet
The role of.
(3) Ring type press out chamber, used on segmented
multi-stage pump*
38. What is the texture color given by centrifugal spring
leaves 7
Answer: the impeller of centrifugal pump is generally made of metal,
which enters according to the liquid flow
It can be divided into single
suction PR force and double suction impeller, which are mainly composed of blade
and wheel
The two-part 6-wheel is used to fix the blade and fix the calling
wheel on the pump shaft-l.
39. What is the function of centrifugal spring
coupling 7
Answer: the function of centrifugal pump coupling is to connect
the pump shaft with the prime mover shaft
Play a role in transmitting the
energy of the prime mover, buffering axial and radial vibrations,
and
Automatically adjust the operation of the prime mover and the slave
machine.
40. How many LP couplers are used?
Answer: there are three
commonly used couplings:
(1) Rigid coupling, suitable for small, low-speed
words with little vibration
On each;
(2) Elastic coupling is suitable for
high-speed equipment with variable load,
(3) Gear couplings are mostly used
on low-speed heavy equipment.
electric high vacuum butterfly valve of three factors should be considered in the selection
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