Is there any tension in the tilting bearings of Hangqi engines? If so, what is the standard value?
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My unit is equipped with one Hangqi-driven centrifugal compressor. I would like to ask whether there is any tension on the tilting bearing of Hangzhou Automobile, and if so, what is the standard for this tension? The unit technician has changed for N shifts; no specific parameters available.
The manual for the Hangzhou Steam Company’s back-pressure steam turbine specifies that there is no tension required. In actual maintenance, a tension of 0–0.02 mm is generally maintained. For reference only
Are you referring to tensile strength? The tilting tile is movable inside the tile casing, so of course there is no tension on the back of the tile.
This post was last edited by wtsinghua on 2015-10-6 at 12:03. The image shows the factory data for the front bearings of Hangzhou Automobile; please check what the diameter of your bearings is.
Rear position, axis D125; no measurement was taken in practice. S1 top clearance: 0.188–0.307 (specified value); actual measurement: 0.13 ； S3 tension: 0-0.02 (parameter based on personal experience); measured value: 0.06. The current situation is that by removing the 10-silk tension pad, a 6-silk gap is created; at that time, 4 silk of tension was applied to the tile back, so the 10-silk tension pad was removed. When the cushion is not used, the temperature inside the vehicle is quite high, reaching over 90 degrees; once the cushion is removed, the temperature drops, and the vibration level is around 40, which is slightly high. However, the tension pad for the front axle bearing was not removed, which may affect the vibration of the rear axle bearing. Two options are being considered now: 1) Use a 10-thread tension pad for the front axle bearing, but I personally don’t think this is a good idea, as there is a 6-thread gap at the back of the bearing, which prevents the bearing cover from pressing tightly against it, resulting in vibrations while driving and higher oil temperatures ； For number 2, a shim of 5 threads is placed at the bearing joint; this ensures the proper clearance at the top of the bearing shells while eliminating any clearance on the back side of these shells. Some people say that there should still be a clearance of 1 thread, but in actual maintenance, the tension on the tilting bearings should be kept within the range of 0–0.02. Neither of the two plans was implemented. (State-owned enterprises have no choice; for even the smallest matters, they need the approval of N leaders. When workers propose solutions, these are not accepted, and they can’t explain why.) I hope fellow netizens can share their thoughts on this, point out any unreasonable aspects, and suggest ways to improve it. Thank you, fellow sailors :)