SU1114474A1 - Method of adjusting centrifuge pusher hydraulic drive with pulsing sediment discharge - Google Patents

Abstract

METHOD OF ADJUSTING A PUSH HYDRAULIC DRIVE TO A CENTRIFUGE WITH A PULSATING UNLOADING OS.LDKA, which consists in adjusting to a given pulsation frequency by changing the active area nopuiun. . SL 41 4ib 4j 4

Description

This invention relates to centrifugal engineering and is a method for setting up a hydraulic drive of a pusher centrifuge with a pulsating discharge of sediment using | if necessary, change the frequency of the pulsation of the pusher. This method is not described in the literature. The method of adjusting the hydraulic drive of the centrifuge pulsator with the pulsating discharge of sediment consists in setting up a given pulsation frequency by changing the active area of the piston. The active area of the piston is changed by changing the number of elements blocking its working area. FIG. I shows the hydraulic actuator of the centrifuge pusher, longitudinal section; in fig. 2 shows section A-A in FIG. I. The hydraulic actuator consists of a pressure device 1 with a volumetric pump of constant capacity, a switchgear 2 and a hydraulic cylinder containing a cylinder 3 mounted on the hollow shaft 4 of a centrifuge mounted in bearings 5 of the bed 6. The cylinder 3 is closed by a cover 7 attached to it by bolts In the cylinder 3 and the cover 7, the channels 9 and 10 are made, through which the working fluid is supplied to the right C and left B working cavities from the tank G of the hydraulic system. A piston 11 mounted on a rod 12 of a pusher (not shown) with a nut 13 is mounted in the cylinder 3 for reciprocating movement. The fingers 14 are installed between the cover 7 and the bottom of the cylinder 3 in the bores of the piston 11, which can be partially or completely replaced axially fastened with split rings 16. Pusher rod 12 is sealed in shaft 4 of the centrifuge by sleeve 17. Bearings 5 are fixed in bed 6 with covers 18. The working fluid is fed into the rotating hydraulic cylinder through a stationary L012345 f 596265687378 G, "t1600 1500 1400 1300 1200 1100

The proposed method for adjusting the hydraulic drive is economical, since at any pulsation frequency the full performance of the hydraulic pump is used (there is no energy loss with the fluid flow returned to the oil tank through the throttle controller 8, as in the well-known methods).

In connection with a more economical control: the proposed method reduces the amount of heat removed by the hydraulic system oil cooler, which reduces the size of the cooler, i.e., reduces its cost and reduces the amount of cooling water consumed by the distributor 2 through pipelines 20 and 21. A method for adjusting the hydraulic drive of a centrifuge pusher with a pulsating discharge of sediment is carried out as follows. If it is necessary to reduce the purity of the pulsation of the pusher, the required number of fingers 14 (or all of the fingers) is replaced by plugs 15 (Fig. 2), which leads to an increase in the active area of the piston, and consequently, in the working volume of the hydrocyliidre. This at a constant performance of the pump of the pressure device 1 reduces the frequency of pulsation. To increase the frequency of pulsation, on the contrary, increase the number of fingers 14, replacing the corresponding number of plugs 15 with them. A specific example of the method is illustrated by the example of a commercially available centrifuge type FGP-1450K. The mechanism for unloading sediment of this centrifuge includes a single-cylinder doyoy hydraulic cylinder with the following characteristics: D 450 mm - cylinder diameter; H 80 mm - piston stroke length; Q 1500 l / min - pump performance; - the number of fingers that can be installed in the piston; m - the diameter of the finger. There is the following relationship between the ripple frequency f and the number of fingers Z: 0.765 () 2H where 0.785 () Rota- is the active area of the piston (mm) and for this particular case Faut is 0.785 () mm. The table shows the relationship-ratios between the value of the active area piston and the number of fingers in the piston. 678 83. 8997 1000 900 800

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Claims (1)

METHOD FOR CONFIGURING A CENTRIFUGE PUSHER HYDRAULIC DRIVE WITH A PULSE-LOADED DRAINAGE, which consists in tuning to a given pulsation frequency by changing the active area of the piston. '. W)