SANY STC750 75 Tons Truck Cranes Excellent Working Conditions

SANY STC750 75 Tons Truck Cranes Excellent Working Conditions

Superstructure:

Cab:

The self-made cab adopts ergonomic design with sliding door, safety glass, anti-corrosion

steel, soft interior decoration, large interior space, panoramic sunroof and adjustable seats,

air conditioner and electric window wiper etc., providing easier and more comfortable

operation. Load moment limiter display is confi gured to achieve the combination of main

console and operating display system, making all operating condition data of lifting

operation clear at a glance.

Hydraulic system

 Through the adoption of electric proportional variable displacement piston pump, pump

displacement can be adjusted in real-time, achieving high-precision fl ow control with no

energy loss during operation.

 Self-developed dual-pump converging / diversion main valve is used, enabling stable

and convenient control of single action and combined action under different operation

conditions.

 Main winch adopts electric proportional variable motor to ensure high operation effi ciency.

Max. single line speeds of main winch is up to 135m/min and the auxiliary winch is 123m/

min.

Closed slewing system with free slipping function equipped to ensure more stable starting

and control of the slewing operation as well as excellent micro-mobility.

Control system

 CAN-bus instrument: CAN-bus instrument with a combined intelligent control electrical

system is used for easy reading of the traveling parameters at any time. The engine fault

warning function is applied to ensure convenient and fast troubleshooting.

Automatic outrigger system: Electrically controlled outrigger with automatic leveling, which

is easy to operate.

 With fully security protection system, main and auxiliary winches are equipped with over-

roll out limiter and height limiters to prevent over-rolling out and over-hoisting of steel rope,

achieving limit angle protection.

Load moment limiter:

The adoption of high intelligent load moment limiter system can

comprehensively protect lifting operation, ensuring accurate, stable and comfort operation.

The fault diagnosis system can detect superstructure electricity and hydraulic as well as

undercarriage chassis and gearbox for fault to ensure reliable operation of the crane.

Luffing system

 The use of dead-weight luffi ng system with compensation control of the system ensures

good luffi ng speed controllability, micro-mobility and excellent stability.

Luffi ng angle : -2°~ 82°.

Telescopic system

 With single-cylinder pin technology, inserting and pulling actions of the cylinder pin and

boom pin can be achieved through electrohydraulic control system.

 Telescopic action of the lifting boom can be applied with a single telescopic cylinder.

The use of multi-stage pressure control, multiple telescopic balance valve element and

mechanical hydraulic double-interlock mechanism of the cylinder pin and boom pin ensure

safe and reliable operation of the telescopic system.

Six-section boom is applied with basic boom length of 13.25m, full-extended boom length

of 60m, jib length of 18.1m and fully extended boom lifting height of 60m respectively.

Max. lifting height is 78.1m including jib. It is made of fi ne grain high-strength steel with

U-shaped cross-section .

Slewing system

 With 360° rotation and with Max slewing speed of 2r/min applied. The use of electric

proportional closed double slewing system ensures perfect operation and stable slewing.

Superstructure

Hoisting system

The adoption of pump and motor double variable speed control ensures high effi ciency

and excellent energy saving functionality. With perfect combination of winch balance valve

and unique anti-slip technology, heavy load can be lifted and lowered smoothly. Closed

winch brake and winch balance valve effectively prevent imbalance of the hook.

 One 100t hook, one 50t hook and one 7t hook are confi gured with weight of 1180kg, 514kg

and 250kg respectively. Wire rope of main winch: right-handed wire rope 35W×7- Φ22-

2160UZZ 280m. Wire rope of auxiliary winch: right-handed wire rope 35W×7-Φ22-2160UZZ

190m.

Safety system

 Load moment limiter:Load detection is achieved through the establishment of accurate

and concise load model, which signifi cantly increases the overall system precision of load

moment limiter. Online empty load marking effectively prevent inaccurate lifting caused by

discrepancy in boom structure specifi cation, increasing system accuracy to ±5%.

 Hydraulic system is configured with the balance valve, overflow valve and two-way

hydraulic lock etc. components, thus achieving stable and reliable operation of the

hydraulic system.

 Main and auxiliary winches are equipped with over roll-out limiter to prevent over rolling-out

of wire rope.

 Boom and jib ends are equipped with height limiters respectively to prevent over-hoisting of

wire rope.

 Boom head is equipped with anemometer to detect whether the high-altitude wind speed is

within the allowable range.

 Equipped with length sensor, angle sensor and press sensor to indicate the working

condition of whole crane in real-time, giving an alarm and cutting off the dangerous action

automatically.

Counterweight

 32.5t movable counterweight can be moved backward 860mm.

There are fi ve counterweight combinations, 0, 8.5, 16.5, 23.5 and 32.5t, which is easy to

install.

Rotary radius is 4635 mm, and 5495 mm after translation movement.

Chassis

Cab

Cab is made of new steel structure self-developed by SANY, featuring excellent shock

absorption and tightness, which is configured with swing-out doors at both sides,

pneumatically suspended driver’s seat and passenger’s seat, adjustable steering wheel,

large rearview mirror, comfortable driver’s chair with a headrest, anti-fog fan, air conditioner,

stereo radio and complete control instruments and meters, providing more comfortable,

safe and humanized operation experience.

Carrier frame

 Designed and manufactured by SANY, anti-torsion box structure is welded by fi ne-grain

high-strength steel plate to provide lighter weight and strong load bearing capacity. With

bending strength increased by 46.8% and with torsional strength increased by 68%

compared with original concave structure.

Axles

Axles 3,4 and5 are drive axles and axles 1,2 and 5 are steering axles, axle and wheel

differentials are installed in axle 3,4 and wheel differential is installed in axle5.The use of

welding process for axle housing provides stronger load bearing capacity.