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Chapter 2: Quick introduction of QRY20
RT20 rough terrain crane is a variety of telescopic growth and swing sort crane which travels with tire sort chassis. It is composed of the superstructure and undercarriage. The superstructure is the lifting portion, composed of the telescopic increase, jib, principal winch, aux. winch, luffing mechanism, counterweight, swivel table, etc. The undercarriage is composed of the suspension and wal ept portion. The superstructure and the undercarriage are linked 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 push, off-road
efficiency, appropriate for off-highway travel.
2. The axle adopts Meritor axle
three. The gearbox adopts the ept model.
4. Service brake adopts Double circuits air bra ept technique Par ept brake adopts air bleed bellow bra ept program.
5. Completely prolonged outriggers procedure, with semi-stretch outriggers operation, without having outriggers procedure and touring with load operation can be realized.
six. Appropriate for slender place travel and operations small turning radius powerful maneuverability.
7. Risk-free and dependable management system, two seats or one particular seat can be optional, all-directional lifting operation,
greatly increased the capability of the entrance lifting.
8. The crane has excellent traffic-ability, dynamic functionality and mobility, and is in a position to run in every single route and vacation whilst hoisting without having outriggers. The merchandise is commonly utilised in weighty lifting operations, limited distance transfer, slender-web site lifting operations for building web sites, outdoor oilfields, warehouses, freight yards, logistics basses and other web sites.
Chapter 4: Security system of QRY20
Safety gadget involves torque limiter, swing table lock unit, winch above-winding and more than-peace defend system, outrigger lock system, outrigger bidirectional hydraulic lock, rear axle steering lock and rear wheel return detector, unexpected emergency steering electricity system, gradienter, hydraulic system overflow valve, balance valve.
1) Torque limiter
Detecting operate: Detect the angle of the growth automatically.
Display operate: Show working data these kinds of as actual load, managing radius, increase angle.
Caution purpose: When the actual load exceeds rated lifting load, torque limiter will give an alarm and end the procedure.
two) Swing desk lock unit
During the driving method, a plug system is utilised to connect the swing desk and the carrier to maintain the steering components (swing table, increase) from swing induced by inertia.
three) Winch more than-winding shield device
When the load reaches a specific height,torque limiter will quit the falling and indicating light on the instrument panel will be on.
4) Winch above-peace protect unit
When only 3 laps of rope is remaining on the winch, torque limiter will end the falling and indicating light on the
instrumentation board will be on.
five) Outrigger lock unit
During the driving process, a plug unit is employed. By plugging the outrigger, the unit deeps it from extending.
6) Outrigger bidirectional hydraulic lock
Outrigger bidirectional hydraulic lock is utilised 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 approach, only front axle steering is necessary and the rear must be returned aligned. For this cause a lock gadget is utilized and indicating mild on the instrumentation board demonstrates the standing.
8) Crisis steering power system (crisis pump)
If there is an emergency that the motor can not be started out, the crane can be dragged by other cars. The unexpected emergency pump is pushed by battery and provides energy to energy cylinder.
Chapter 5: Technological innovation parameter of QRY20
Desk 5-1 QRY20 Main technical parameters table in vacation state
| Group | Items | Models | Parameters | ||
| Outline Dimension Parameters |
Overall size | mm | 12000 | ||
| Overall width | mm | 2750 | |||
| Overall height | mm | 3650 | |||
| Axle foundation | mm | 3600 | |||
| Tread | mm | 2250 | |||
| Weight Parameters | Dead excess weight in journey point out | Kg | 24000 | ||
| Axle load | Front axle | Kg | 12650 | ||
| Rear axle | Kg | 11350 | |||
| Power Parameters | Engine rated output | Kw/(r/min) | 140/2200 | ||
| Engine rated torque | N.m(r/min) | 760/1400~1600 | |||
| Vacation Parameters | Travel speed | Max. travel pace | Km/h | forty | |
| Min. steady vacation pace | Km/h | 9.65 | |||
| Turning radius | Min. turning radius | m | 3.23 | ||
| Min. turning radius of growth head | m | 315 | |||
| Min. ground clearance | mm | eighteen | |||
| Approach angle | ° | eighteen | |||
| Departure angle | ° | ≤8.five | |||
| Bra ept length (at 30km/h) | m | fifty | |||
| Max. quality ability | % | eighty four | |||
| Max. outdoors sounds throughout accelerating | dB(A) | 12650 | |||
Desk 5-2 QRY20 Main Complex Parameters Table in Lifting Point out
| Class | Items | Unit | Parameters | |||
| Main Performance Parameters | Max. whole rated lifting load | t | 20 | |||
| Min. rated wor ept radius | m | 3 | ||||
| Max. load minute | Base increase | KN.m | 697 | |||
| Fully-extended growth | KN.m | 552 | ||||
| Outrigger span | Longitudinal | m | five.83 | |||
| Lateral | m | 5.six | ||||
| Lifting top | Base growth | m | ten | |||
| Fully-prolonged boom | m | 30.seven | ||||
| Boom duration | Base increase | m | nine.nine | |||
| Fully-extended increase | m | 31.2 | ||||
| Wor ept Speed Parameters | Luffing time | Boom increasing time | s | 55 | ||
| Boom descending time | s | 36 | ||||
| Boom telescoping time | Boom fully-extended time | s | eighty | |||
| Boom totally retracting time | s | 48 | ||||
| Max. swing/slewing velocity | r/min | 2. | ||||
| Outriggers telescoping time | Horizontal outriggers | Extending synchronously | s | 16 | ||
| Retracting synchronously | s | eleven | ||||
| Vertical outrishock guardIndustries that generally use Torque Limiters to protect their equipment include: Standard machining and producing Packaging and assembly solutions Printing and converting industries Textile manufacturing Forest goods Certain programs for Torque Limiters include: Conveyors: If the conveying program jams, the Torque Limiter will disconnect the driving motor from the conveyor to protect critical components. Gearboxes: This further security mechanism stops excess torque from achieving vulnerable factors in the driven system. Generators: Electrical power outages can trigger sporadic moments of excessive torque. A Torque Limiter can stop that drive from harming the products. Motors: The Torque Limiter can disengage the motor shaft from the pushed technique in the celebration it generates too a lot torque for the machinery to handle.ggers | Extending synchronously | s | 30 | |||
| Retracting synchronously | s | 30 | ||||
| Hoisting speed (wire rope is at the 4th layer) | Main winch | Full load | m/min | a hundred and forty | ||
| No load | m/min | a hundred and ten | ||||
| Auxiliary winch | Entire load | m/min | one hundred forty | |||
| No load | m/min | ninety | ||||
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