Maeda MC815C - Rotary Joint Specifications; Rotary Joint Connection Destinations; Rotary Joint Structure

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4.12.2 ROTARY JOINT SPECIFICATIONS
Item No. S106J3568000
Port name A.B.C.D.E.F G DR
Maximum service pressure 25 MPa 5 MPa 0.5 MPa
Withstand pressure 31 MPa 7 MPa 1.0 MPa
Flow rate 90 l/min 15 l/min 15 l/min
Revolution speed 1.5 min
-1
Temperature range of oil used -30 to 95ºC (instantaneously 100ºC)
4.12.3 ROTARY JOINT CONNECTION DESTINATIONS
Rotary joint
Port name Port destination Port size Note:
Stationary
section
A Crane control valve winch A port G3/4 Lifting
B Crane control valve winch B port G3/4 Lowering
C Crane control valve telescope B port G1/2 Contraction
D Crane control valve derrick B port G1/2 Lowering
E Crane control valve telescope A port G1/2 Extension
F Crane control valve derrick A port G1/2 Raising
G Travelling switch (speed-up) valve P port G1/4 A3 pump pressure
DR Hydraulic oil tank via return manifold block G3/8 Drain
Rotating section A Winch motor A port G3/4 Lifting
B Winch motor B port G3/4 Lowering
C Telescopic cylinder retraction side G1/2 Contraction
D Derrick cylinder lowering side G1/2 Lowering
E Telescopic cylinder extension side G1/2 Extension
F Derrick cylinder raising side G1/2 Raising
G Winch brake releasing P port G1/4 PPC
DR
Winc h motor D port
G3/8 Drain
Winch brake releasing T port
4.12.4 ROTARY JOINT STRUCTURE
No. Name Qty. Note
1 Shaft 1
2 Roto
r
1
3 Cove
r
1
4 Space
r
1
5 Flange 1
6 Rotary seal 8
7 O-ring 1 1B-P80
8 O-ring 1 1B-G95
9 O-ring 1 1
A
-G80
10 O-ring 1 1B-P50
A
11
V
-ring 1
V
-90
A
12 Dust seal 1
SCB-50
13 Snap ring 1
C type for shaft, 65
14 Hexagon socket head cap bolt 4
M10×30L
15 Hexagon socket head cap plug 9
R3/8
16
Hexagon socket head cap plug
2
R1/4
17
Hexagon socket head cap plug
1
R1/8
18 Name plate 1
19 Shaft assembly 1