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worm reducer machine spindle fever causes and adjustment method
Common cause of bearing heating
Both the bearings, or sliding bearings, the bearing assembly reasons, the sliding bearing clearance adjustment is too small, the rolling bearing pre-load is too large, it will increase the resistance of the bearing rotation, resulting in bearing heating. Bearing internal reasons, the sliding bearing surface roughness, the shape is not correct, the low precision of the manufacture of rolling bearings, so bearing in the case of low accuracy, high speed, also increases the rotation resistance, the bearing to produce fever phenomenon. Match parts, mainly due to the impact of external forces, resulting in curved spindle box before and after the bearing bore concentricity tolerance, or belt adjustment too tight in the spindle, or spindle installed on the weight of rotating parts manufacturing is not accurate, and under external deformation, the uneven impact of the internal organization, there the focus of the rotation axis of concentricity error is too large, resulting in a large centrifugal force, but also make the bearing by the non-normal force caused bearings fever.
From the work environment, bearing fever, one is poor lubrication conditions. For example, the lubricating oil supply is poor; by adding the amount of grease is not enough; lubricant, not grease the use of grades, not clean. Other protective measures is not good, so that the working environment in the dirt, dust entering the bearing.
(2) bearing the fever generally Remedy
(1) should first check the bearing lubrication conditions are met.
(2) Check the bearing is subjected to large centrifugal force.
(3) Check the bearing clearance is adjusted right.
(4) of the above checks and adjustments, if the bearing is also fever, to consider the demolition of the spindle, check the bearing internal quality problems, and to repair and update.
When the equipment subject to abnormal external forces, or by accidental damage, but also consider the deformation of the spindle and box bearing bore. Check whether the sp indle bending, the rear axle holes are coaxial. Found that the problem must be symptomatic repair.
Reason and judgment,
gear reducer gear noise increases
Machinery and equipment gear noise increases, the maintenance of the common mechanical failure. To reduce the gear noise, you must first accurately determine the causes of gear noise increases, to take symptomatic measures to adjust and repair.
A. Gear noise characteristics
(1) in the gear noise frequency, both the gear meshing frequency, but also has its own natural frequency. The former with the drive shaft speed of change in proportion to produce a corresponding change, while the latter has nothing to do with speed. Meshing frequency of gear in rotation by the mandatory continuous impact, is an important part of the gear noise. The inherent frequency of the gear and its structure is closely related.
(2) The continuous impact of the reas ons for gear between the gear itself, if the pitch and shape of the tooth surface there is a big error, the gear can not be evenly meshing rotation, sometimes dramatically accelerated, and sometimes a sharp deceleration, so that the tooth with the collision between the teeth, the tooth under a lot of additional dynamic loads.
Also occur due to external reasons, caused by the phenomenon of impact between the teeth and the tooth, for example, load variations of the transmission link, driveshaft runout rotation and other aspects of the natural frequency of resonance.
(3) in need of repair gear noise, in general, in the overall structure as well as gears, bearings, shaft, cabinet and other parts of the equipment after the calculation and practice on the basis of long-term use produced. Therefore, in need of repair gear noise, and equipment factory noise compared to judgment. Noise increases the phenomenon is not difficult to find, difficult to find the noise source.
2 main factors affect the gear noise increases
(1) gear rotation system of rotating eccentric phenomenon increases.
(2) tooth surface failure in serious condition.
(3) the influence of external vibration source.
Three. Commonly used method to determine the source of gear noise
(1) coated with red lead powder method to judge.
(2) playing table measurements to judge.
(3) Transmission map.
(4) by the intuitive observation, analysis and judgment.
, Deceleration machine parts repair-for-France
The various models reducer model to adjust the gap method and error compensation method, belong to a limited range of adjustment method. Excess of the specification, it will not work. In this case, only the relevant parts for repair or replacement in order to achieve the purpose of the adjustment device accuracy.
Four, with the parts method
(1) slow down the bearing hole in the box of the demolition of bearing too many times, th e aperture is often larger, or by other damage. If not longer use the original bearing bore dia
meter boring, casement, re-processing, to meet the accuracy requirements of the installation bearing. Boring, it is necessary to take into account the thickness of the casement can not be too thin, in order to enhance the mosaic of firmness, but also take into account the intensity of the box can not have too much weaken.
(2) precision adjustment, and sometimes between the stationary mating surface can be added to the appropriate thickness of shims to adjust with the movement between the surface accuracy.
(3) under the premise has been to clarify the relationship of the drive failure and does not affect part strength, by increasing the locating pins, set screws, the positioning ring and other necessary parts to improve the quality of assembly components to ensure equipment accuracy stability.
