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hydraulic rope locking device 7, and the lower hydraulic rope
         adjusting device  8 utilize a wedge self-locking principle to
         lock up the steel wire rope 1 by means of the wedge-shaped
         iron blocks 2-2. When the steel wire rope 1 moves upwards
         under the tensioning effect, it drives the two wedge-shaped
         iron blocks 2-2 to move upwards; in the upward movement
         process, the wedge-shaped iron blocks 2-2 gradually increases
         the acting force on the steel wire rope 1 and thereby the steel
         wire rope 1 cannot escape, as the constraining clearance in
         the tapered slot of the shim 2-3 gradually decreases.
           As shown in figures 8, 11, and 12, under the driving ef-
         fect of the pumping station 11, the actions of the wedge-ad-
         justing hydraulic cylinder 7-3 can be controlled to adjust the
         tightness of the wedge-shaped iron blocks 2-2, so as to lock   Figure 12: Detail drawing of the lever mechanism of the shaft guide
         up or loosen up the steel wire rope 1. The tensioning method   steel wire rope tensioner.
         for the ultra-deep shaft guide steel wire rope tensioner in the
         present invention is as follows: when the steel wire rope 1 is   tensioning force value, the hydraulic rod of the tensioning hy-
         in a normal working state, the upper rope clamping device   draulic cylinder 8-6 at the lower hydraulic rope adjusting de-
         2 and the lower hydraulic rope adjusting device 8 lock the   vice 8 will retract, and thereby tension up the steel wire rope
         steel wire rope 1, the lower hydraulic rope locking device 7   1 so that the tensioning force is increased, till the tensioning
         releases the steel wire rope 1, the lower hydraulic rope ad-  force reaches to 97% of the preset tensioning force value to
         justing device 8 and the counterweights 6-4 work together to   ceasing action of tensioning hydraulic cylinder 8-6; when the
         provide tensioning force, the sensor 4 sends measured ten-  tensioning force is greater than 103% of the preset tensioning
         sioning force signal to the control console 5, and the follow-  force value, the hydraulic rod of the tensioning hydraulic cyl-
         ing operations are carried out, according to the magnitude of   inder 8-6 at the lower hydraulic rope adjusting device 8 will
         the measured tensioning force.                       extend, and thereby loosen up the steel wire rope 1 so that the
           When the tensioning force is smaller than 97% of a preset   tensioning force is decreased, till the tensioning force reaches
                                                              to 103% of the preset tensioning force value to ceasing action
                                                              of tensioning hydraulic cylinder  8-6; when the tensioning
                                                              force is greater than or equal to 97% of the preset tensioning
                                                              force value and smaller than or equal to 103% of the preset
                                                              tensioning force value, the tensioning will be terminated.
                                                               The  tensioning hydraulic  cylinder  8-6 is  arranged with
                                                              an upper stroke control switch and a lower stroke control
                                                              switch for the telescopic rod, in order to improve the ten-
                                                              sioning force adjusting range of the hydraulic rope adjusting
                                                              device 8 on the steel wire rope 1, and prevent a phenomenon
                                                              that the tensioning force still does not meet the requirement
                                                              when the hydraulic rod of the tensioning hydraulic cylinder
                                                              8-6 reaches a limit position.
                                                               When the hydraulic rod of the tensioning hydraulic cylin-
                                                              der 8-6 retracts to a limit position, the lower stroke control
                                                              switch will be triggered, the lower hydraulic rope locking de-
                                                              vice 7 will lock up the steel wire rope 1, the lower hydraulic
                                                              rope adjusting device 8 will release the steel wire rope  1,
                                                              meanwhile the hydraulic rod of the tensioning hydraulic cyl-
                                                              inder 8-6 will extend to reset; when the hydraulic rod of the
                                                              hydraulic cylinder 8-6 extends to a limit position, the upper
                                                              stroke control switch will be triggered, the lower hydraulic
                                                              rope adjusting device 8 will lock up the steel wire rope 1, and
                                                              the  lower  hydraulic  rope  locking  device  7  will  release  the
                                                              steel wire rope 1, so that the tensioning action of the tension-
                                                              ing hydraulic cylinder 8-6 will be repeated.
                                                               When the hydraulic rod of the tensioning hydraulic cylin-
                                                              der 8-6 extends to a limit position, the upper stroke control
                                                              switch will be triggered, the lower hydraulic rope locking de-
                                                              vice 7 will lock up the steel wire rope, the lower hydraulic
                                                              rope adjusting device 8 will release the steel wire rope  1,
                                                              meanwhile the hydraulic rod of the tensioning hydraulic cyl-
                                                              inder 8-6 will retract to reset; when the hydraulic rod of the
                                                              hydraulic cylinder 8-6 retracts to a limit position, the lower
                                                              stroke control switch will be triggered, the lower hydraulic
                                                              rope adjusting device 8 will lock up the steel wire rope 1, and
                                                              the  lower  hydraulic  rope  locking  device  7  will  release  the
                                                              steel wire rope 1, so that the tensioning action of the tension-
         Figure 11: Sectional view of the structure of the shaft guide steel wire
         rope tensioner.                                      ing hydraulic cylinder 8-6 will be repeated. WRN
                                                              Wire Rope News & Sling Technology   October 2017  67
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