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Chapter 2: Short introduction of QRY20
RT20 rough terrain crane is a sort of telescopic increase and swing variety crane which travels with tire sort chassis. It is composed of the superstructure and undercarriage. The superstructure is the lifting element, composed of the telescopic boom, jib, primary winch, aux. winch, luffing mechanism, counterweight, swivel table, and many others. The undercarriage is composed of the suspension and wal ept element. The superstructure and the undercarriage are connected by the slewing bearing.
Chapter 3: Primary attributes of QRY20
one. Entrance-wheel steering, rear wheel steering, four wheel steering and crab steering, all wheel drive, off-road
functionality, ideal for off-freeway travel.
two. The axle adopts Meritor axle
3. The gearbox adopts the ept brand.
4. Support brake adopts Double circuits air bra ept program Par ept brake adopts air bleed bellow bra ept program.
5. Totally prolonged outriggers procedure, with semi-stretch outriggers procedure, without having outriggers operation and traveling with load operation can be understood.
6. Ideal for slender place vacation and functions small turning radius strong maneuverability.
7. Safe and dependable handle system, two seats or a single seat can be optional, all-directional lifting procedure,
greatly enhanced the potential of the entrance lifting.
eight. The crane has great targeted traffic-ability, dynamic efficiency and mobility, and is ready to work in every single route and journey whilst hoisting with out outriggers. The merchandise is commonly employed in weighty lifting operations, short length transfer, slim-web site lifting functions for building websites, outdoor oilfields, warehouses, freight yards, logistics basses and other sites.
Chapter 4: Basic safety device of QRY20
Safety device includes torque limiter, swing desk lock device, winch more than-winding and above-peace protect device, outrigger lock device, outrigger bidirectional hydraulic lock, rear axle steering lock and rear wheel return detector, emergency steering power unit, gradienter, hydraulic system overflow valve, stability valve.
one) Torque limiter
Detecting operate: Detect the angle of the growth routinely.
Display purpose: Present running information these kinds of as true load, managing radius, boom angle.
Caution perform: When the true load exceeds rated lifting load, torque limiter will give an alarm and cease the operation.
2) Swing desk lock system
During the driving procedure, a plug unit is used to link the swing desk and the carrier to hold the steering areas (swing table, boom) from swing triggered by inertia.
3) Winch above-winding protect device
When the load reaches a particular peak,torque limiter will stop the falling and indicating gentle on the instrument panel will be on.
4) Winch over-relaxation protect system
When only 3 laps of rope is remaining on the winch, torque limiter will cease the slipping and indicating gentle on the
instrumentation board will be on.
5) Outrigger lock system
During the driving method, a plug unit is utilised. By plugging the outrigger, the system deeps it from extending.
6) Outrigger bidirectional hydraulic lock
Outrigger bidirectional hydraulic lock is employed to insure the horizontal and vertical cylinder will not
automatically retract when outriggers are in the extending condition .
7) Rear axle steering lock and rear wheel return detector
During the driving procedure, only front axle steering is required and the rear ought to be returned aligned. For this explanation a lock gadget is employed and indicating light on the instrumentation board displays the position.
8) Crisis steering energy device (crisis pump)
If there is an emergency that the engine can not be started out, the crane can be dragged by other automobiles. The emergency pump is driven by battery and materials electrical power to power cylinder.
Chapter 5: Technology parameter of QRY20
Desk 5-1 QRY20 Main technical parameters table in travel condition
| Category | Items | Models | Parameters | ||
| Outline Dimension Parameters |
Overall size | mm | 12000 | ||
| Overall width | mm | 2750 | |||
| Overall top | mm | 3650 | |||
| Axle foundation | mm | 3600 | |||
| Tread | mm | 2250 | |||
| Weight Parameters | Dead bodyweight in journey state | Kg | 24000 | ||
| Axle load | Front axle | Kg | 12650 | ||
| Rear axle | Kg | 11350 | |||
| Power Parameters | Engine rated output | Kw/(r/min) | one hundred forty/2200 | ||
| Engine rated torque | N.m(r/min) | 760/1400~1600 | |||
| Vacation Parameters | Travel velocity | Max. vacation pace | Km/h | forty | |
| Min. secure travel velocity | Km/h | 9.sixty five | |||
| Turning radius | Min. turning radius | m | three.23 | ||
| Min. turning radius of increase head | m | 315 | |||
| Min. floor clearance | mm | eighteen | |||
| Approach angle | ° | 18 | |||
| Departure angle | ° | ≤8.five | |||
| Bra ept dSome torque limiters are designed to tolerate becoming run in a constant slip problem – that is the torque from the driving factor may regularly exceed the “slip torque” price, and only the preset stage of torque is transmitted.istance (at 30km/h) | m | fifty | |||
| Max. grade capability | % | eighty four | |||
| Max. outside noise in the course of accelerating | dB(A) | 12650 | |||
Table 5-2 QRY20 Main Complex Parameters Table in Lifting Condition
| Classification | Items | Unit | Parameters | |||
| Major Efficiency Parameters | Max. overall rated lifting load | t | 20 | |||
| Min. rated wor ept radius | m | three | ||||
| Max. load minute | Base increase | KN.m | 697 | |||
| Fully-extended increase | KN.m | 552 | ||||
| Outrigger span | Longitudinal | m | five.83 | |||
| Lateral | m | five.6 | ||||
| Lifting peak | Base growth | m | ten | |||
| Fully-prolonged growth | m | 30.7 | ||||
| Boom size | Base increase | m | 9.nine | |||
| Fully-extended boom | m | 31.2 | ||||
| Wor ept Velocity Parameters | Luffing time | Boom boosting time | s | fifty five | ||
| Boom descending time | s | 36 | ||||
| Boom telescoping time | Boom fully-extended time | s | 80 | |||
| Boom totally retracting time | s | 48 | ||||
| Max. swing/slewing speed | r/min | 2. | ||||
| Outriggers telescoping time | Horizontal outriggers | Extending synchronously | s | 16 | ||
| Retracting synchronously | s | 11 | ||||
| Vertical outriggers | Extending synchronously | s | thirty | |||
| Retracting synchronously | s | thirty | ||||
| Hoisting velocity (wire rope is at the 4th layer) | Main winch | Entire load | m/min | 140 | ||
| No load | m/min | 110 | ||||
| Auxiliary winch | Full load | m/min | a hundred and forty | |||
| No load | m/min | 90 | ||||
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