Mainstream of bearing types

For bearing types,linear plain bearings and mobile crane bearing is the mainstream, but most of the use of self-aligning roller bearings in the non linear favorable. Non linear spindle generally need to consider the plus or minus 0.5 degrees.
As B type automatic self-aligning roller bearing  is designed by the use of the middle block side guide roller , it is no skew of the maximum load wide in the minimum load to load region , which can run in a stable torque and low fever cases.
In addition,vibration of blade and gear box vibration increasing of the rotor thin wall bearings, there is danger of corrosion and friction .Therefore, optimal bearing selection and clearance and mating and selection of suitable oil is very important.

Set the value of the hydraulic system and crane bearing

In general, truck crane bearing hydraulic system pressure is 18 ~ 35MPa; through a multi way reversing valve, the hydraulic cylinder, hydraulic motor actuator to perform each action.

  Thus for the fault of hydraulic system pressure is insufficient, according to the form to diagnose five institutions loop,linear plain bearings , what is the insufficiency which loop system pressure.

  For example, rod reducing pressure, pressure is not up to the allowable value, which indicates lack of telescopic crane loop system pressure. Then according to the hydraulic circuit pressure is insufficient,mobile crane bearing , according to the basic form of the pressure pump oil supply mode and the hydraulic circuit, judge which is a hydraulic pump, an overflow valve malfunction caused by insufficient pressure.

Development of wheel bearings

   Traditional automotive agricultural bearings is composed of two tapered roller bearings or ball bearing combination, bearing installation, oiled, sealed and adjust clearance are carried out in the car on the production line. This structure makes it difficult in a car assembly plant, high cost, poor reliability, and maintenance car maintenance, but also the need for bearing cleaning, oiling and adjustment.
    Developed on the basis of the hub bearing unit is the standard angular contact ball bearings and tapered roller bearings on, it will be two sets of bearings as a whole, with good assembly performance can be omitted clearance adjustment, light weight, compact structure, load capacity large, sealed linear plain bearings grease can be loaded in advance, hub seals and omitted from the outside wheel maintenance, etc., has been widely used in cars, and in the truck also has a tendency to gradually expand the application.
    Car wheel bearings are used in pairs over most single row tapered roller or ball bearings. With the development of technology, the car has been widely used car wheel units. Growing scope and use of the hub bearing unit, has now developed to the third generation:
The first generation is a double row angular contact bearing components.The
second generation of the outer raceway has a flange for fixing the crane bearing

, the bearing sleeve may simply be fixed with a nut on the axle. So that the vehicle maintenance becomes easy.The third generation wheel hub bearing units are used bearing unit and ABS anti-lock brake system fitted. Wheel hub unit is designed to have the inner flange and outer flange, the inner flange is bolted to the drive shaft, the entire bearing outer flange fit together.