SB (YQP) Series Hydraulic Caliper Disc Brakes
Application scope:
-
Emergency safety braking of low-speed shafts in the hoisting mechanisms and luffing mechanisms of large and medium-sized cranes, as well as port loading and unloading machinery.
-
Service braking and emergency safety braking for mining rolling mills and hoists.
-
Safety braking of drive mechanisms in cable cars and cable cranes.
Main design features:
- Normally closed design ensures high safety and reliability; braking is actuated by dedicated disc spring force, while release is hydraulically driven.
- Rapid response with a short brake engagement time.
- Factory-installed release limit switches and brake pad wear limit switches are provided, which can deliver interlock protection and fault indication when paired with a PLC control system.
- High-performance asbestos-free hard friction pads feature a stable friction coefficient, cause no damage to brake discs, and exhibit excellent adaptability to water media and salt spray (seawater) environments.
- Optimized sealing structure design yields superior sealing performance and an extended service life.
- Flexible mounting options enable convenient operation, adjustment, and maintenance.
Operating Conditions：
- Ambient temperature: -20 °C to 50 °C.
- The ambient working environment must be free of flammable, explosive or corrosive gases.
- Relative air humidity: ≤ 90%
- Installation altitude shall comply with the provisions of GB 755-2000.
Model Designation
External dimensions
Outline dimensions table
|
Product model |
A |
a1 |
a2 |
a3 |
b1 |
b2 |
B |
C |
d |
n |
K |
P |
L |
E |
W |
H |
|
SB(YQP)50 |
77 |
77 |
90 |
38 |
38 |
38 |
154 |
150 |
20.5 |
8 |
56 |
102 |
300 |
240 |
110 |
299 |
|
SB(YOP)100 |
95 |
95 |
105 |
45 |
55 |
45 |
190 |
180 |
25 |
8 |
71 |
102 |
348 |
286 |
140 |
345 |
|
SB(YQP)160 |
110 |
120 |
135 |
65 |
70 |
65 |
260 |
235 |
31 |
8 |
87 |
106 |
412 |
370 |
170 |
398 |
|
SB(YQP)250 |
130 |
120 |
160 |
75 |
80 |
75 |
300 |
275 |
37 |
8 |
87 |
106 |
456 |
370 |
170 |
459 |
|
SB(YQP)315 |
140 |
175 |
205 |
85 |
90 |
82.5 |
335 |
330 |
37 |
8 |
137 |
106 |
476 |
410 |
270 |
500 |
|
SB(YQP)400 |
170 |
180 |
220 |
120 |
110 |
110 |
440 |
420 |
50 |
8 |
137 |
142 |
602 |
546 |
270 |
549 |
Brake Disc-Related Dimensions
|
Product model |
b |
D |
d1 |
d2Max |
||
|
SB(YQP)50 |
30 |
36 |
40 |
≥500 |
D-120 |
D-300 |
|
SB(YQP)100 |
30 |
36 |
40 |
≥500 |
D-150 |
D-380 |
|
SB(YQP)160 |
30 |
36 |
40 |
≥600 |
D-180 |
D-440 |
|
SB(YQP)250 |
30 |
36 |
40 |
≥600 |
D-180 |
D-480 |
|
SB(YQP)315 |
30 |
36 |
40 |
≥1200 |
D-280 |
D-600 |
|
SB(YQP)400 |
30 |
36 |
40 |
≥1800 |
D-280 |
D-660 |
d1 = Theoretical friction diameter d2= Maximum allowable outer diameter of the drum or connecting hub
Technical data
|
Product model |
Clamping force |
release pressure (Mpa) |
Open valve oil volume (ML) |
Retreat distance (mm) |
Friction coefficient (μ) |
Installation bolts/ strength values/torque (N.m) |
Weight (excluding bracket) (Kg) |
|
SB(YQP)50 |
50 |
11 |
15 |
2 |
0.4 |
8-M20,12.9,750 |
90 |
|
SB(YQP)100 |
100 |
12 |
50 |
2 |
0.4 |
8-M24,12.9,1000 |
150 |
|
SB(YQP)160 |
160 |
12 |
70 |
2 |
0.4 |
8-M30,12.9,1500 |
310 |
|
SB(YQP)250 |
250 |
13 |
95 |
2 |
0.4 |
8-M36,12.9,2500 |
552 |
|
SB(YQP)315 |
315 |
14 |
115 |
2 |
0.4 |
8-M36,12.9,3540 |
672 |
|
SB(YQP)400 |
400 |
12 |
170 |
2 |
0.4 |
8-M48,12.9,4000 |
1100 |
Note: Specific models and structural dimensions are subject to change without prior notice.
Product Overview
Working Principle of SB (YQP) Series Hydraulic Caliper Disc Brakes: This series adopts a normally closed design, where braking is actuated by the force exerted by specially engineered disc springs, and release is achieved via hydraulic actuation.When pressure is supplied by the hydraulic system, it pushes the piston to overcome the spring force of the disc springs, causing the brake caliper to open and enabling the brake disc to rotate freely. When hydraulic pressure is relieved or drops, the disc springs rebound elastically, pushing the brake pads to clamp the brake disc tightly, thus generating friction torque and fulfilling the braking function.The braking force range varies across different models of the SB (YQP) series. For instance, the SB (YQP) 160 model has a braking force range of 72 kN–220 kN. Multiple specifications of compatible brake disc diameters are available to meet the requirements of different equipment; the SB (YQP) 160, for example, is suitable for brake discs with a diameter of ≥ 1,800 mm.
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