SU1725075A1 - Balancer - Google Patents

Abstract

The invention can be used for automatic balancing of heavy washing machines and improves reliability by eliminating centrifugal loads on the fluid supply unit. The device comprises a base on which a non-rotating body is elastically mounted. The casing contains a rotor with chambers and a liquid distributor. Hydraulic cylinders are installed between the casing and the base. The source of fluid is connected to the input line with the hydraulic cylinders, and the latter - the output line to the spool. Check valves are installed at the inlet and outlet lines. The spool is connected to the fluid distributor and is controlled by a dynamic state sensor. The more body vibrations, the more fluid is fed by the cylinders into the chambers to correct imbalance. 2 hp f-ly, 2 ill. cl

Description

The invention relates to mechanical engineering and can be used for high-performance balancing of rotors on elastic supports, in particular heavy washing machines and squeezing centrifuges.

A balancing device is known which contains a multi-chamber body designed to accommodate a balancing liquid, liquid distributors, measuring and switching equipment.

The said device is distinguished by high accuracy, but limited performance and capacity, relatively high complexity and cost.

Closest to the present invention is a balancing device, made in the form of an elastically fixed rotor mounted in a rotating housing and supported by four hydraulic cylinders,

control valves through which fluid is supplied to the chambers of the device placed on the rotor.

The disadvantage of this device is the low reliability associated with the rotation of the fluid supply unit (cylinders and valves). Centrifugal forces lead to sticking of valves and moving parts of the device, as a result of which the balancing process proceeds with considerable inertia and inaccuracy, which does not allow to compensate for a significant imbalance in a matter of seconds and reduces the accuracy of balancing.

Another disadvantage of this device is the limited range of operation of one of the modes — preresonance, resonance, or resonance — which makes it difficult to use such a device for

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machines operating in three bands, for example, heavy washing machines.

In addition, a disadvantage is the low accuracy associated with the presence of the dead zone of the fluid supply unit (if there is no such zone, the device chambers quickly overflow because the liquid will flow continuously and the device will stop working).

The aim of the invention is to increase reliability by eliminating the rotation of the fluid supply unit.

In addition, the purpose of the invention is to expand the range of operation and improve the accuracy of balancing.

The goal is achieved by balancing a device comprising a base, a housing mounted on it, a rotor with chambers and a liquid distributor, hydraulic cylinders, an output line with valves, equipped with a source of liquid and an input line with non-return valves between the liquid source and cylinders, the casing is installed on the base of the elastic, the hydraulic cylinders are connected to the base and the casing, and the valves of the output line are made backward. The device is additionally equipped with a two-position spool communicated with the liquid distributor and a dynamic state sensor connected to it mounted on the base.

FIG. 1 shows the device, the general scheme; in fig. 2 - camera position.

The device comprises a base 1, on which a housing 2 is elastically mounted. In the housing there is a rotor 3 with chambers 4 and a liquid distributor 5, made in the form of an annular cavity 6 with radial partitions 7 according to the number of chambers. Hydraulic cylinders 8 are installed between the housing and the base. A fluid source (not shown) is connected by an inlet pipe 9 to hydraulic cylinders which are connected by an outlet line 10 to an on-off slide valve 11. A spool 12 and 13 are connected to the fluid distributor and controlled from a dynamic state sensor 14. On the inlet and outlet lines x check valves 15 are installed.

The device works as follows.

In the process of acceleration of the rotor 3, the dynamic state sensor 14, made in

the form of either a tachometer or a time counter, includes a two-position slide valve 11 when the rotor enters the resonance. Fluid during this period is supplied through pipeline 13. The oscillations of the housing 2 from the imbalance are communicated to the hydraulic cylinders 8, which suck the fluid from the inlet line 9 as the body moves upwards and eject the liquid along the outlet highway 10

chamber 4 opposite to the unbalance when the housing moves down. The greater the amplitude of oscillation, the more fluid is released in each double stroke. Reducing imbalance automatically

leads to a decrease in fluid flow. A further increase in the rotational speed in the spin mode and the rotor output to the resonance region leads to the switching of the spool 11 by the sensor 14 to the pipeline

12, the output of which is shifted by 90G relative to the exit of the pipeline 13. As long as the imbalance changes, the rotor vibrates to produce a fluid that corrects the imbalance.

Installing hydraulic cylinders with non-return valves on the inlet and outlet lines between the movable body and the base allows increasing the reliability and accuracy of balancing, reducing

dynamic loads on the elements of the machine and the foundation, increase the uptime of the machine.

Claims (3)

Claim 1. Balancing device comprising a base, a housing mounted thereon, a rotor contained therein with chambers and a liquid distributor, hydraulic cylinders and an outlet line with valves, characterized in that, in order to increase reliability, it is provided with a source of fluid and located between the source fluids and hydraulic cylinders inlet manifold with non-return valves, the casing is mounted on an elastically base, the hydraulic cylinders are connected to the base and the casing, and the valves of the outlet line are made backward. 2. The device according to claim 1, characterized in that it is provided communicable with a liquid distributor with a two-position spool and a dynamic state sensor connected to it. 3. The device according to paragraphs. 1 and 2, different from the fact that the sensor is a dynamic condition set on the base. W FIG. Z .The composer V.Sutormin Editor V. Bugrenkov Tehred M. Morgen Corrector V. Girn Order 1169 Circulation: Subscription VNIIPI State Committee for Inventions and Discoveries at the State Committee on Science and Technology of the USSR 113035, Moscow, Zh-35, 4/5 Raushsk nab. Production and Publishing Combine Patent, Uzhgorod, Gagarin st., 101