The aerial work platform is a new generation of folding arm lifts. Can be widely used in stations, docks, airports, hotels, post and telecommunications, municipal gardens, grain storage, cleaning companies, public buildings facade decoration, decoration or power system installation and maintenance, and so on. The elevator has the advantages of light weight, self-propelled running, electric starting, self-supporting legs, simple operation, large working surface, free rotation of 360 degrees, and especially high-altitude operations that can overcome obstacles. Can be suitable for outdoor operations, using diesel as a power. It is also possible to use batteries as the walking and working power of the machine as required. The author stated that in the maintenance of aerial vehicles , the maintenance of the chassis is the most tense, but many users do not know to value this point, people who use the car know that the car is rotten, and the chassis ensures the quietness of the vehicle and the owner. Rusted, the structure of the vehicle will be loose, which is related to the life safety issues of high-altitude workers. Therefore, the maintenance of the chassis of the aerial work vehicle can not be sloppy, and many traffic accidents are caused by the looseness of the chassis. Below, the author will explain to the users of high-altitude aerial vehicles the method and significance of the chassis maintenance of aerial work vehicles. First, the chassis should be washed frequently and rinsed clean. Normally, anti-rust primers are sprayed on overhead vehicles , but they will gradually oxidize after a certain period of time. Armor is basically strengthening the chassis and thoroughly washing the chassis, and then spraying the chassis with elastic plastic material. To protect the chassis. The baking from the earth's surface, the invasion of rainwater, and the moisture and salt in the atmosphere are the causes of deterioration. The non-stop impact of sand on the road will also make the anti-rust paint on the chassis of the special car destroyed, so that the metal will be bare on the appearance of the chassis, and will quickly snuggle with moisture to produce oxidation and rust. In this way, it is necessary to remove chassis attachments such as tires, brake pads, etc., and thoroughly clean the bottom of the vehicle. This is to prevent impurities from adversely affecting the chassis. After drying, wrap the non-sprayed parts and spray the anti-rust primer several times. Second, check the brake system of aerial vehicles . Visually observe the appearance of the brake disc through the tire aluminum alloy steel ring. The appearance of the brake disc was originally smooth, and if there were obvious grooves, it was probably when the aerial vehicle was driving on the gravel road. Some tiny sand and gravel stuck between the brake disc and the fender, constantly rubbing the appearance of the brake disc. As a result, grooves appear. When this kind of environment arises, the high-altitude vehicle may give out a voice of “when it's right and wrong†when walking. In some circumstances, owners will also hear screams when they are dragging the brakes. Third, check the powertrain, transmission system with or without oil. There are several major components (such as engine, gearbox, rear axle, etc.) with or without oil leakage. Fourth, the test content Check whether the appearance of tire tread pattern is normal (such as whether there is a crack, whether there is a foreign body). Fifth, check whether the vehicle is full of oil and water and whether the oil quality is good. The contents include the engine oil of the aerial work vehicle, the coolant, the transmission, etc. If the liquid level is not enough, the change will be made if the oil quality is not good. During the operation of high-altitude vehicles, many components are in a very harsh operating environment: high temperature, high speed, dusty, bumpy roads, etc. Some parts are constantly worn due to frequent high-speed movements, and other parts are also When you inadvertently bruise, it requires timely inspection, adjustment or replacement. The author believes that regular maintenance of aerial work vehicles is mainly based on inspections and adjustments. Regular inspections of brakes, steering, transmission, and suspension systems are provided for each type of maintenance, so that they can have a safe driving environment. Through regular Inspection and maintenance can also find and solve existing hidden troubles and faults in time, and avoid the occurrence of even bigger faults.
The Tapered Roller Bearing belongs to the separation type bearing, and the inner and outer rings of the bearing have a conical raceway. This type of bearing is divided into single, double and four row Tapered Roller bearing according to the number of the roller. The single row tapered Roller Bearing can bear the radial load and the single direction axial load. When a bearing is subjected to a radial load, an axial force will be generated, so another bearing that can withstand the axial force of the reverse direction is needed to balance it.
Size range
Taper Roller Bearing Sizes,Taper Roller Bearing,Small Tapered Roller Bearings,Taper Roller Bearing Dimensions LUOYANG AUTO BEARING CO.,LTD , https://www.lyautobearing.com
The basic dimensions of the ZWZ tapered roller bearings are listed in the size data sheet.
Single row tapered roller bearing:
Inner diameter range: 20mm ~ 1270mm
Size range of outer diameter: 40mm ~ 1465mm
Width range: 15mm to 240mm
Double row tapered roller bearing:
Inner diameter range: 38mm ~ 1560mm
Size range of outer diameter: 70mm ~ 1800mm
Width range: 50mm to 460mm
Four row tapered roller bearings:
Inner diameter range: 130mm ~ 1600mm
Size range of outer diameter: 200mm ~ 2000mm
Width range: 150mm to 1150mm
tolerance
ZWZ metric conical roller bearings have general tolerance, and also provide P6X, P6, P5, P4, P2 tolerance products, all in accordance with the GB307.1.
ZWZ taper roller bearings have general tolerance, and they can also provide CL2, CL3, CL0 and CL00 tolerance products as required.
Radial clearance
ZWZ single row tapered roller bearings only have clearance after installation, and the bearings in the opposite direction can be adjusted to determine.
Cage
The tapered roller bearings are usually stamped by steel plate and basket cage, but when the size is large, the mainstay of the solid support is also used.
1. when the bearing outer diameter of D is less than or equal to 650mm, the stamping steel cage, the cage rear code are not marked
2. when the outer diameter of the bearing is D>650mm, the steel solid pillar holder is used, and the post code of the cage is not marked.
Permissible error
Equivalent dynamic load
P=Fr KN] when Fa/Fr is less than or equal to e
P=0.4Fr +YFa [KN] when Fa/Fr>e
When a single row tapered roller bearing is used in pairs (the basic size is different), the additional axial force caused by radial load must be included when calculating the equivalent dynamic load of the bearing. The additional axial force S of a single row tapered roller bearing can be approximated by a press type calculation: S= Fr/2Y
Equivalent static load
Single row tapered roller bearing
P0=0.5Fr +Y0Fa KN]
If P0<Fr takes P0=Fr
Double and four row tapered roller bearings
P=0Fr +Y1Fa [KN] when Fa/Fr is less than or equal to e
P=0.67Fr +Y2Fa [KN] when Fa/Fr>e
Suffix definition
A: internal structure changes
B: increased contact angle
X: international standards are used in dimensions
CD: double outer ring with oil holes or oil grooves.
TD: double rings with taper hole.
