subject: The Improvement Of Jaw Crusher Eccentric Shaft [print this page] The improvement of jaw crusher eccentric shaft
First, to improve bad situation
The jaw crusher has been put into operation in the 1990s, multiple sleeve loosening the eccentric shaft sleeve, flywheel wear phenomenon, our engineers, testing, analysts believe that the crusher eccentric shaft sleeve, gland, there are some structural defects.
There are two main reasons:
The crusher eccentric shaft seal kits and sleeve threaded to the design is unreasonable, the pulley end and flywheel end gland, sleeve threads are right hand. Counterclockwise rotation during operation, the eccentric shaft in the direction of the flywheel end, when the eccentric shaft driven by the sleeve counterclockwise rotation due to inertia, the gland a clockwise rotation of the torque to the flywheel pulley side sealed sets of threads are right hand, why the two glands tendency to move both the direction of the pulley, pulley side of the gland move to the pulley direction will pulley top tight end of the cone and, in turn, set firmly in the top tight in eccentric shaft, the pulley end of the sleeve is not too loose flywheel gland moving direction of the pulley, will leave the flywheel end, make the sleeve easy to loose the occurrence of wear in the loss of top tight force eccentric shaft.
Taper sleeve and the contact area between the eccentric shaft with the surface is not enough, by design, the contact area is less than 80%, in order to create enough friction to overcome the inertia force of the taper sleeve, if less than 80%, will cause the sleeve in the eccentric axis to produce loose, loose, eccentric shaft cylindrical and cone comprising a hole wear and cause the flywheel face wear. So that equipment can not operate.
Second, repair and improvements
Change the flywheel side seal sleeve and the sleeve threaded to
Because the thread is right-handed, the glands of sleeve will not move to the pulley side, the pulley side loose, so the pulley end threaded to the need to change, the flywheel side seal sleeve and the sleeve threaded dextral changed to L eccentric shaft counterclockwise rotation, due to the inertia force, the gland move the direction of the flywheel to the top tight flywheel, turn the flywheel cone stuck tight - Top eccentric shaft sleeve eccentric axis does not produce loose.
Repair with the surface of the eccentric shaft and the Bushes
Increase the contact area, wear the eccentric shaft and bevel applied welding surfacing, roughing and finishing the car, with the surface grinding, the grinding method is: to repair a good sleeve into the eccentric shaft with the surface , with the purpose of 400 emery do grinding media, grinding time 0.5h, clean emery coated mimeographed verify, such as the failure, use the aforementioned method and then grinding until you meet the requirements.
Repair worn flywheel end
100mm flywheel gland contact face wear on the flywheel side of the set of a 100mm long, short sets, in order to maintain the same flywheel in the eccentric shaft position.
Third, the pef900 1200 jaw crusher eccentric shaft improve the effectiveness
Improvement of the above several pef900 1200 jaw crusher after a year of use, well, eccentric shaft and the Bushes did not appear too loose, not only save a lot of spare parts costs, reducing the maintenance workload, but also better with other equipment production, improve the operating rate.
