RU2618721C1 - Anti-reverse device - Google Patents

Abstract

FIELD: engines and pumps.

SUBSTANCE: anti-reverse device comprises a stationary arresting gear ring and locking elements which are arranged rotatably on the cylindrical axes mounted in the balancing disk connected to the pump shaft. In the balancing disk contains cylindrical grooves at an angle to the axis of rotation of the locking elements, in which rolling elements are stacked being in contact with the locking elements.

EFFECT: increased reliability of anti-reverse device operation.

2 dwg

Description

The invention relates to volumetric displacement pumps for liquids with rotational movement of the working bodies, and more particularly to structural units of vane pumps, and can be mainly used in nuclear power plants (NPPs) in the main circulation pumping units (GTsN) of the coolant circuit of a nuclear power plant (NPP) passing through the core of a nuclear reactor.

Known pumping unit (patent RU No. 224165 F04D 15/02, publ. 10.01.2005), which contains a vane pump with a vertical shaft, an electromagnetic discharge device with a fixed ring electromagnet (CE), as well as an anti-reverse device, including a fixed gear ratchet ring and locking elements (SE). In an anti-reverse device, a gear ratchet ring of internal engagement is covered by FE. Each solar cell is rotatably mounted on an axis installed in the discharge disk connected to the pump shaft. Each SC is made with a displacement of the center of mass from the axis on which it is placed.

In this pump unit, the anti-reverse device has the following disadvantages:

firstly, with a slight weakening of the spring, a situation may arise in which the FE does not engage, since the spring installed in the FE is selected so that its elastic force is sufficient to push the FE into engagement with the ratchet ring when stopping the rotation of the rotor and at the same time not was excessive so that the FE during rotation of the rotor could turn under the action of centrifugal forces in order to stop impacting the teeth of the ratchet ring;

and secondly, if the cavity in which the spring is installed is contaminated, a situation may arise in which the solar cell does not engage with the gear ratchet ring.

When implementing the invention, the following interrelated technical results can be obtained, in particular:

firstly, the guaranteed engagement of the FE with the gear ratchet ring is achieved when the spring is weakened over time or the cavity in which the spring is installed is dirty;

secondly, a guaranteed engagement of solar cells with a gear ratchet ring is achieved using additional elements independent of each other;

thirdly, improving the reliability of the operation of the anti-reverse device.

As a solution to the problem of protection against reverse rotation, which allows to achieve an effect with the indicated characteristics, an anti-reverse device is proposed, which includes a fixed gear ratchet ring and locking elements that are rotatably mounted on cylindrical axes installed in the unloading disk connected to the pump shaft, and differs in that in the unloading disk, grooves of a cylindrical shape are made at an angle to the axis of rotation of the locking elements, in which the rolling bodies that are in contact with the stop GOVERNMENTAL elements.

The proposed device is illustrated by drawings.

FIG. 1 - anti-reverse device, side view.

FIG. 2 - anti-reverse device, top view.

The proposed anti-reverse device contains (Fig. 1, 2):

a fixed gear ratchet ring 5, a rotating unloading disk 6 connected to the shaft with locking elements 1 mounted on it on cylindrical axes, with their springs 4 supported, with cylindrical grooves 2 made vertically at an angle to the rotation axes of the locking elements 1, in grooves 2 laid rolling bodies 3 in contact with the locking elements.

The proposed anti-reverse device operates as follows.

At the beginning of the rotation of the shaft of the rolling body 3 under the action of centrifugal forces depart from the locking elements 1, freeing them. When the rotor shaft stops, when the action of centrifugal forces weakens, the locking elements 1 return to their original state not only under the action of the spring 4, but also under the action of the rolling elements 3 at the ends of the locking elements, additionally stimulating their extension, while repeatedly reducing the speed bouncing and hitting rolling elements at the ends of the locking elements, also performing additional stimulation of the extension of the locking elements.

Thus, the proposed anti-reverse device plays the role of a kind of guaranteed closer of the locking elements 1.

Claims (1)

An anti-reverse device, including a fixed gear ratchet ring and locking elements, which are rotatably mounted on cylindrical axes installed in the discharge disk connected to the pump shaft, characterized in that the discharge disk is made of cylindrical grooves at an angle to the rotation axis of the locking elements, in which rolling bodies are placed that are in contact with the locking elements.

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