Totally-enclosed open type commutator

Abstract

The invention relates to a full-close type open type commutator. The commutator is characterized in that the commutator comprises a stator and a rotor which has relative rotation with the stator in the stator, wherein the inner surface of the stator and the outer surface of the rotor are in sealing fit by liquid; the stator is provided with a liquid inflow port and at least two liquid outflow ports; the rotor is provided with a connecting passage; when the rotor rotates, the liquid inflow port of the stator can be selectively communicated with one of the liquid outflow ports of the stator by the connecting passage; and when the rotor is in the process of rotating and switching a flow passage, the liquid inflow port of the stator is always positioned in the caliber range of an inlet of the connecting passage. When the commutator is reversed, no phenomenon of sputtering is produced; and simultaneously, flow fields of the commutator before and after reversing are still symmetrical to ensure that two liquid outflow ports have consistent flow. As the inner surface of the stator and the outer surface of the rotor are in sealing fit by liquid, the commutator solves the problem of the overflow of steam when the flow of hot water is measured; and therefore, the commutator is suitable for a standard device of a heat meter.

Description

technical field [0001] The invention belongs to the technical field of flow standard devices, in particular to a fully enclosed open commutator that needs to quickly switch fluid flow directions. Background technique [0002] The purpose of the water flow standard device is to test the accuracy of the flow meter, and the commutator is a key part of the water flow standard device, and its quality directly affects the measurement accuracy of the flow. At present, there are mainly two types of open commutator and closed commutator used in the water flow standard device. [0003] The biggest advantage of the open commutator is that it will not affect the flow field of the tested fluid during the commutation process. However, there are two ways to realize the existing open commutator: one of which is to use the nozzle to pass through the The back and forth swing of the "pants" device realizes the reversing of the fluid. Since the "pants" device is relatively large, the required ...

AI Technical Summary

Problems solved by technology

At present, the commutators used in various water flow standard devices cannot meet the requirements of devices for measuring heat meters.

The open commutator will have a lot of hot steam overflowing from the front of the "pants" device, which will take away energy loss, and the hot steam is another state of water, so the overflow of hot steam will take away the loss of hot water quality , affecting the measurement accuracy

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