t2k magnet production 0001
TRANSCRIPT
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T2K 280
Magnet
MOVING SYSTEM
ELECTRICAL CIRCUIT
COOLING CIRCUIT
CONTROL & SAFETY SYSTEM
YOKE
COILS
tel+390649914256
C.Gargiulo
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Part to be replaced or rebuiltPart to be replaced or rebuilt
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MAGNET MOVINGMAGNET MOVINGSYSTEM
Components and parameters
RAILS
MAGNET SUPPORT STRUCTURE
THRU
ST
FOR
CE
DAMPERSHORIZONTAL
ANDVERTICALMOVINGDEVICE
Leadsrews
Gear motorPosition precision (working position)
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Re-use of the existing carriage support beam structure from UA1 experiment
Finalloads of Side MRD, ECAL andhave to be known to verify the structure .One additional motor support to the structure has to be fixed if the solution ofone single gear motorper
half magnet will be adopted for the moving system
Present weight of each carriage is about 11tons
The support structure is the only part of the MMS of UA1/Nomad available
MAGNET MOVINGMAGNET MOVINGSYSTEM
Magnet Support Structure: ITEM 3
The Magnet Support Structure has two basic functions:
2) Carry the weight of magnet and Ecal
3) Act as interface between the moving system and
the load
Structure should also withstand horizontal forces which occur during acceleration andbraking phase of moving periods
The stability of the system should also be considered since the center of mass of the
magnet is relatively high.
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MAGNET MOVINGMAGNET MOVINGSYSTEM
Horizontal moving devices
ITEM 9rollers
ITEM 8dampers
ITEM 4rails
ITEM 7foot
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MAGNET MOVEMENTMAGNET MOVEMENTSYSTEM
Rails ITEM 4
Rails versus fundation:
Rails have to be mounted on top of a steel plate and a layer of special fluid concrete
in order to distribute the load uniformely to the foundation.
Rails versus Moving System:
The straightness and parallelism deviations can be compensated with alignment
screw and a movable levelling device on each side of the rail.
The alignmentof the rails over the distance of the UA1 magnet displacement should
be well within the specifications. Rollersare very sensitive for height variations.
No rails is available from Nomad
T2k -280m 09 03
2005
DIMENSION SCHEME
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MAGNET MOVEMENTMAGNET MOVEMENTSYSTEM
Rails ITEM 4
Rails versus Moving System:
The rails will be in sections alligned and
assembled toghether
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Rails and hydraulic jacks footprint
PREL
IMINAR
Y
400
1100
Dimensions in mm
4500
2500
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Rollers are one of the smallest heavy transport devices with the highest carrying capacity available.
They consist of a frame fabricated from high alloy steeel and a chain of cylindrical steel rolls
Their solid construction enables wide range of application for many conditions and long product life
with minimum maintanace
No horizontal moving devices is available from Nomad
Proposed Design: n. 8 Roller Skates for each yoke halves (assumed 500T per halves)
Roller Model V AS-H-50CrV4 (roller 50CrV4)
number of rollers: 17
number of rollers under stress: 6
Maximum load: 85 T
Weight: 93 kg
Guiding rolls installed against rails
MAGNET MOVINGMAGNET MOVINGSYSTEM
Horizontal moving device ITEM 9 Roller
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MAGNET MOVINGMAGNET MOVINGSYSTEM
dampers ITEM 8
No horizontal moving devices is available from Nomad
Proposed suspension system is based on spring disk.
Foreseen 4 spring units for each roller. A spherical connection to the carriage ensures
an uniform loading for each spring disk.
Rollers are sensitive to alignment errors inrail. Based on that there has to be elasticity
between the roller and support structure to
compensate the errors.
T2k -280m 09 03
2005
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MAGNET :MAGNET :
Vertical moving device ITEM 10
Hydraulic jacksEnerpac
Hydraulic jacks
The hydraulic jacks between the
carriage and the cavern floor. Thewhole structure could be finally
supported by twelve jacks
n.12 100-tons hydraulic cylinders
for each magnet half
Design under development
-Pit reinforced not only under the rails but also
under the jacks
-modification to the Magnet foot
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MAGNET MOVINGMAGNET MOVINGSYSTEM
Vertical moving device ITEM 11 Hydraulic jacks
The hydraulic jacks are between the carriage and the cavern floor. The whole structure is finallysupported by six jacks
n.12 100-tons hydraulic cylinders for each magnet half
Contact area of the piston head is 198cm2. To distribute this rather high surface pressure of the
head to concrete , a steel plate should be embedded on contact area against concrete floor.
The clinder piston has a spherical head that compensate alignment errors in contact surface of the
order of +/-2
The cylinder are equipped with locking nut devices that keep the device in
the correct position in case of pressure drop
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CLL-106
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CLL-106
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Hydraulic Jack related required components:
Standard electrical pump with capacity of 40 liters and pressure of 700bars
Minimum required pump capacity Vmin= Number of jacks per jacks oil capacity
=20 l+50%(piping)
Minimum continuos working pressure Pmin= Magnet half load/(6xPiston Surface Area)
=415 bar+40%bar (speed)
Control Unit for each half magnet
Distribution line to jacks
Height measuring device at each jack
Enerpac produces this kind of component:
Syncronous lift system SLS 16B or SLS 16P 61
MAGNET MOVINGMAGNET MOVINGSYSTEM
Vertical moving device control
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one single gear motor
by mean of two shafts drives the two lead screws
-shaft
-lead screw
-lead screw head fixation
-motor support
Gear motor
shaft
shaft
Lead screw
MAGNET MOVINGMAGNET MOVINGSYSTEM
Gear motor dimension
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In the Nomad experiment each screw is driven by an individual motor which mean that two motors
are required to move one magnet half.
The experiences of this system among users are negative.
Problem in the control of the sincronization between the two motors resulted in time consuming
manual control .
A solution that foreseen one single gear motor that, by mean of two shafts, drive the two leadscrews, is being investigated
MAGNET MOVINGMAGNET MOVINGSYSTEM
Gear motor dimension ITEM 12-13-14-25
Motor OVERALL parameters determination:
Weight of one magnet half m500000 kg
Rolling coefficient for the rollers rollers=0.03
Lead screw efficency screw =0.2gear efficency gear =0.9
screw advancing per revolution d=48mm/23revolutions=2.09mm/rev
required magnet displacement speed v=100mm/min=0.0017m/s
Required gear output speed n=v/d=100/2.09 48rpm
Required movig force F= rollers x m x g=500000x0.03x9.81= 147150N
Required power P= (F x v)/ =147150x0.0017/(0.2x0.9)=1.39kWRequired torque M= Px9550/n=1.39x9550/48=277Nm