Bucket elevator several common reasons for failure and exclusion methods
Bucket elevator is agro-processing factories and towns widely used in a vertical grain management elevator equipment, with a lifting height, improve stability, small footprint
and good sealing, etc.. Suitable elevator powder, granular and small bulk materials.
Are several common failures of the equipment to analyze the causes and proposed exclusion approach:
A hopper with skid
(1) bucket elevator is the use of hopper bands and head round the friction torque between the drive shaft for elevator materials, unpredictable enough hopper belt tension will
cause the hopper with skid. At this time, you should immediately shut down, adjust the belt tensioning device to tighten the hopper. If you can not make the hopper belt
tensioning device is fully tensioned tensioning device described the trip was too short, should be re-adjusted. Correct adjustment method is: unlock hopper with coupling to the
bottom tensioning device on the wheel adjusted to the highest position, the hopper with the head placed by the hoist through the first round and bottom round, and both
connected, so that the hopper without tension in the tension band state. Then the tensioning device is fully tensioned. At this point tensioning device untapped tension Power Roller Conveyor
adjustment screw stroke of not less than 50% of the whole trip.
(2) hoist overload hoist overload, resistance torque increases, resulting in the hopper with skid. You should reduce the amount of material fed and seeks uniform feeding. If you
reduce the feed rate, still not improve skid, sit inside the machine may be too much or material accumulation mentor material hopper are stuck, you should stop to check,
(3) the first round of the drive shaft and the inner surface is too smooth hopper with round shafts and heads hopper with the inner surface is too smooth, so that the friction
between them decreases, resulting in the hopper with skid. At this time, the hopper with the shaft and the inner surface coated with a layer of adhesive to increase the
(4) the end of the first round and the first round of wheel bearing rotation ineffective and bottom wheel bearing rotation ineffective, moment of resistance increases, causing flexible conveyor
the hopper with skid. Then washable refueling or replace bearings.
2 hopper with a deviation
(A) the end of the first round and the first round wheel shaft is improperly installed wheel shaft is improperly installed and the bottom is mainly reflected in the following
aspects: First, the end of the first round of the wheel and drive shaft in the same vertical plane and not parallel; Second two shafts are mounted in a horizontal position and
not in the same vertical plane; third two parallel shafts, and not in the same vertical plane level. At this time, the hopper with a deviation could easily cause a crash and
barrel hopper, hopper bands tear. Should be immediately shut down, troubleshooting. Be the first wheel and a bottom wheel shaft mounted in the same vertical plane, and are in a
horizontal position, the whole height 1000mm vertical centerline deviation of less than 2mm, accumulated deviation does not exceed 8mm.
(2) hopper with hopper with connector fitting errors is not exactly mean with combined hopper, the hopper is not in line with the edge of a straight line. Work, while tight side
of the hopper with loose, so that the hopper to the tight side with lateral movement, resulting deviation, resulting in inadequate feeding hopper Sheng, discharge is not
complete, back to the material increased, decreased productivity, causing severe side hopper with a card , torn. At this time should be shut down, fix joints and connected.
3 material back too
Elevator back to the material means material in the unloading position not fully discharged outside the machine, and some of the material hoist machine back seat of the
phenomenon. In improving operations, if elevator back to the material too, is bound to reduce production efficiency, increase power consumption and material breakage. Causing
material back more for the following reasons:
(1) Hopper running too fast Lifting different materials, the speed of operation is different from the hopper: Average enhance dry powder and pellets, the rate of about 1 ~ 2m /
s; elevate bulk materials, the speed of 0.4 ~ 0.6m / s; enhance the wet powder and pellets, the speed of 0.6 ~ 0.8m / s. Speed is too large, early discharge, causing material
back. At this time should be based on improvement of materials, appropriate to reduce the speed of the hopper to prevent back feed.
(2) discharge outlet nose tongue plate mounting inappropriate, tongue plate location is too far away from the hopper discharge will cause back feed. Should be timely adjusted
tongue position to avoid back feed.
4 hopper off
Hopper off refers to the production, the hopper falling from the hopper belt phenomenon. Hopper is dropped, it will produce abnormal sound, to timely stop to check, otherwise,
will lead to more hoppers deformation, shedding; positions in connection hopper, hopper band tear. Produce hopper off the main reasons are:
(1) Feed feed too much too much, resulting inside the base material in the accumulation of resistance increases elevator, hopper runs sluggish, is to produce hopper off, the
direct cause of deformation. You should immediately shut down, out of the base under the flapper, from the plane seat backlog and replacement of new hopper, then drive
production. Then reduce the feed rate, and seeks uniformity.
(2) feed inlet position is too low in general, in the production hoist, hopper scooping themselves come from the material inlet. If the feed inlet position is too low will
result in no time scooping material hopper, while most of the material into the machine base, causing the hopper scoop materials. The material is massive, it is easy to cause
deformation of the hopper, fall off. At this time, you should adjust the position of the inlet end of round above the centerline.
(3) hopper material is not good, the intensity is limited hopper hoist bearing member, it has a high material requirements, installation should be as good material matching
strength. Usually, the hopper with ordinary steel or galvanized sheet metal welding or stamping, folding the edges using galvanized wire or involved to enhance the strength of
(4) boot inside the base does not clear a backlog of material in production, often encounter a sudden power failure or other causes shutdown of the phenomenon, if more power,
there is no clear backlog inside the base material, it is easy to cause the hopper by Shock is too large to break off. Thus, in between stop and start, you must clear the
backlog physics base, avoiding the hopper off. Also, regularly check the hopper and the hopper is firmly connected with, the screws loose, fall off and the hopper skew, damage
and other phenomena, it shall promptly repair or replace, to prevent more accidents happen.
5 hopper with tear
Hoist hopper with typically canvas belt, sometimes with tape and chains. In the combined effects of various faults, canvas belts and tape prone to tear, which is one of the most
serious failures. General hopper and the hopper with a deviation most likely caused by the shedding process hopper tear. Should be timely and comprehensive identification of
reasons for troubleshooting. In addition, the material is mixed with a sharp edge of the foreign body, will also split hopper with planning. Therefore, the production, it should
be installed in the inlet or magnet wire mesh to prevent large objects have fallen into the base.