ISO 15783:2002 シールレス回転動力ポンプ—クラスII —仕様 | ページ 6

3.1

magnetic drive pump

MDP

pump in which the shaft power of the drive is transferred to the impeller of the pump by means of a permanent magnetic field, which passes through a containment barrier (shell) to an inner rotor having permanent magnets or an induction device

3.2

canned motor pump

CMP

pump in which the stator of an electric motor is separated from the rotor by a sealed containment barrier (liner)

Note 1 to entry: The rotor runs in the liquid being pumped or in another liquid.

Note 2 to entry: The shaft power is transmitted by means of an electromagnetic field.

3.3

seal-less rotodynamic pump

pump design in which the impeller shaft also carries the rotor of either a canned induction motor or a synchronous or an asynchronous magnetic drive

Note 1 to entry: The design does not use a dynamic shaft seal as a primary containment device. Static seals are the means used for containing the fluid.

3.3.1

hydraulic end

that end of the pump which transfers mechanical energy into the liquid being pumped

3.3.2

power drive end

that end of the pump containing the magnetic coupling (MDP) or the motor (CMP) which provides the mechanical energy necessary for the operation of the hydraulic end

3.3.3

lubrication and cooling flow

flow necessary in a magnetic drive in the area between the inner magnet and the containment shell, or in a canned motor between the rotor and the sleeve, for dissipation of the heat due to inherent eddy current losses in metallic containment shells and frictional heat generation from bearings, and for lubrication

Note 1 to entry: Internal pump bearings are lubricated and cooled by the pumped fluid or an external, compatible flushing fluid.

3.3.4

close coupled

coupling arrangement in which the motor is supplied with a flange adapter which mounts directly onto the casing or body of the pump and in which the outer magnet ring is mounted onto the motor shaft

3.3.5

separately coupled

arrangement in which the motor and pump have separate mounting arrangements with the outer magnet ring mounted on its own shaft, supported by rolling bearings, and connected to the motor shaft by means of a flexible coupling

3.3.6

air gap

radial distance between the inner diameter (ID) of the outer magnet assembly and the outer diameter (OD) of the containment shell

3.3.7

liquid gap

radial distance between the ID of the shell and the OD of the rotor sheath

3.3.8

liquid gap

radial distance between the ID of the liner and the OD of the rotor sheath

3.3.9

total gap

magnetic gap

radial distance between the ID of the outer magnets and the OD of the inner magnets/torque ring

3.3.10

total gap

magnetic gap

total distance between the ID of the stator laminations and the OD of the rotor lamination

3.3.11

radial load

load perpendicular to the pump shaft and drive shaft due to unbalanced hydraulic loading on the impeller, mechanical and magnetic rotor unbalance, rotor assembly weight, and forces of the fluid circulating through the drive

3.3.12

axial load

load in line with the pump shaft caused by hydraulic forces acting on the impeller shrouds and inner magnet assembly

3.3.13

axial load

load in line with the pump shaft caused by hydraulic forces acting on the impeller shrouds and rotor

3.3.14

hydraulic load balance

axial load equalization by means of an impeller design, impeller balance holes or vanes, or by balancing through variable orifices in the drive section and hydraulics

3.4

starting torque

maximum net torque transmitted to the driven components during a hard (full voltage) start-up of the unit

Note 1 to entry: It is affected by the inertia of the pump and motor rotors, the starting torque capacity of the motor and the power versus speed requirements of the liquid end.

3.5

break-out torque

torque load applied to the drive shaft with the rotor locked at the point at which magnetic decoupling occurs

3.6

locked rotor torque

maximum torque that a motor will develop when prevented from turning

3.7

eddy currents

electrical currents generated in a conductive material when strong magnetic fields are rotated around it

3.8

magnetic coupling

device which transmits torque through the use of magnet(s) attached to the drive and driven shafts

3.9

inner magnet ring

rows of magnets operating within the containment shell, driven by the outer magnet ring

Note 1 to entry: The inner magnet ring is mounted on the same rotating element as the pump impeller.

3.10

outer magnet ring

rows of permanent magnets securely fixed to a carrier, evenly spaced to provide a uniform magnetic field

Note 1 to entry: The outer magnet ring, while rotating, transmits power through a containment shell, driving the inner magnet ring or torque ring.

3.11.1

eddy current drive

asynchronous magnetic coupling consisting of a permanent outer magnet ring and an inner torque ring containing a network of conductive rods supported on a mild steel core

Note 1 to entry: The rotating outer magnet ring generates eddy currents in the copper rods which convert the core to an electromagnet. The electromagnet follows the rotating outer magnet ring but at a slightly slower speed due to slip.

3.11.2

eddy current loss

power loss resulting from eddy currents

Note 1 to entry: The energy in these eddy currents is normally dissipated as heat due to the electrical resistance of the material.

3.11.3

torque ring

laminations and conductors mounted on the rotor in which electric currents are induced in an eddy current drive

3.11.4

decouple

failure of a synchronous magnetic coupling to rotate synchronously, or the stall condition of an eddy current drive

3.11.5

slip

speed differential between the torque ring and outer magnet ring in an eddy current drive pump or between the running speed and the synchronous speed in a CMP

3.11.6

demagnetization

permanent loss of magnetic attraction due to temperature or modification of the field