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Chapter 2: Brief introduction of QRY20
RT20 rough terrain crane is a kind of telescopic boom and swing variety crane which travels with tire variety chassis. It is composed of the superstructure and undercarriage. The superstructure is the lifting part, composed of the telescopic boom, jib, principal winch, aux. winch, luffing system, counterweight, swivel table, etc. The undercarriage is composed of the suspension and wal ept part. The superstructure and the undercarriage are related by the slewing bearing.
Chapter 3: Primary functions of QRY20
one. Entrance-wheel steering, rear wheel steering, 4 wheel steering and crab steering, all wheel push, off-highway
performance, appropriate for off-freeway travel.
two. The axle adopts Meritor axle
three. The gearbox adopts the ept manufacturer.
4. Provider brake adopts Double circuits air bra ept system Par ept brake adopts air bleed bellow bra ept system.
5. Entirely extended outriggers procedure, with semi-stretch outriggers procedure, with no outriggers operation and touring with load operation can be realized.
6. Suited for slim space journey and operations small turning radius robust maneuverability.
7. Protected and reputable control method, two seats or a single seat can be optional, all-directional lifting procedure,
greatly enhanced the ability of the front lifting.
8. The crane has very good traffic-potential, dynamic overall performance and mobility, and is in a position to operate in every course and vacation while hoisting without having outriggers. The product is widely utilized in heavy lifting functions, limited distance transfer, narrow-site lifting operations for construction web sites, outdoor oilfields, warehouses, freight yards, logistics basses and other sites.
Chapter 4: Protection unit of QRY20
Safety system contains torque limiter, swing table lock gadget, winch in excess of-winding and more than-leisure defend gadget, outrigger lock unit, outrigger bidirectional hydraulic lock, rear axle steering lock and rear wheel return detector, emergency steering electrical power unit, gradienter, hydraulic method overflow valve, harmony valve.
1) Torque limiter
Detecting operate: Detect the angle of the growth immediately.
Display function: Display running details such as actual load, dealing with radius, growth angle.
Caution purpose: When the true load exceeds rated lifting load, torque limiter will give an alarm and stop the operation.
two) Swing table lock unit
During the driving process, a plug device is utilized to link the swing table and the provider to hold the steering elements (swing table, increase) from swing induced by inertia.
three) Winch more than-winding shield device
When the load reaches a specified height,torque limiter will quit the slipping and indicating gentle on the instrument panel will be on.
4) Winch over-peace shield gadget
When only 3 laps of rope is left on the winch, torque limiter will end the falling and indicating gentle on the
instrumentation board will be on.
five) Outrigger lock system
During the driving method, a plug gadget is used. By plugging the outrigger, the gadget deeps it from extending.
six) 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 procedure, only front axle steering is needed and the rear need to be returned aligned. For this explanation a lock unit is employed and indicating gentle on the instrumentation board exhibits the status.
eight) Emergency steering electrical power unit (unexpected emergency pump)
If there is an unexpected emergency that the motor can not be started, the crane can be dragged by other cars. The crisis pump is driven by battery and materials energy to electricity cylinder.
Chapter 5: Engineering parameter of QRY20
Desk 5-1 QRY20 Main specialized parameters table in travel point out
|WeighIdeally the torque limiter ought to be positioned as close as achievable to the supply of the jam. This will allow the system inertia and torque to be speedily and successfully disconnected from the jammed area. The method can then be allowed to coast to a cease without having causing additional equipment injury. A mechanical torque limiter will provide quicker response occasions and greater security than common electronic techniques at higher crash charges.t Parameters||Dead bodyweight in journey condition||Kg||24000|
|Axle load||Front axle||Kg||12650|
|Power Parameters||Engine rated output||Kw/(r/min)||a hundred and forty/2200|
|Engine rated torque||N.m(r/min)||760/1400~1600|
|Vacation Parameters||Travel velocity||Max. vacation speed||Km/h||40|
|Min. stable journey velocity||Km/h||9.sixty five|
|Turning radius||Min. turning radius||m||3.23|
|Min. turning radius of increase head||m||315|
|Min. floor clearance||mm||18|
|Bra ept length (at 30km/h)||m||50|
|Max. grade capacity||%||84|
|Max. outside sounds in the course of accelerating||dB(A)||12650|
Desk 5-2 QRY20 Main Complex Parameters Desk in Lifting Condition
|Main Performance Parameters||Max. total rated lifting load||t||20|
|Min. rated wor ept radius||m||three|
|Max. load second||Base growth||KN.m||697|
|Lifting height||Base increase||m||ten|
|Boom size||Base increase||m||9.nine|
|Wor ept Velocity Parameters||Luffing time||Boom increasing time||s||55|
|Boom descending time||s||36|
|Boom telescoping time||Boom completely-extended time||s||80|
|Boom fully retracting time||s||forty eight|
|Max. swing/slewing velocity||r/min||2.|
|Outriggers telescoping time||Horizontal outriggers||Extending synchronously||s||sixteen|
|Vertical outriggers||Extending synchronously||s||30|
|Hoisting velocity (wire rope is at the 4th layer)||Main winch||Total load||m/min||a hundred and forty|
|No load||m/min||a hundred and ten|
|Auxiliary winch||Total load||m/min||140|
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