西安秦威仪表厂

Introduction to vortex flowmeter: / Vortex flowmeter is also called vortex flowmeter or Karman vortex flowmeter. Carefully designed products based on comprehensive absorption of advanced technologies from developed countries and summarizing years of research and production experience have achieved product intelligence, standardization, serialization, generalization, production molding, and ensured the aesthetics of product quality. This product has the characteristics of advanced circuit, low power consumption, wide range ratio, simple structure, small resistance loss, ruggedness, wide application, long service life, stable operation, and easy installation and debugging. / Principle of vortex flowmeter: / If a triangular prism-shaped vortex generator is set up in the fluid, regular vortices will be generated alternately from both sides of the vortex generator. This vortex is called a Karman vortex. The vortex rows are arranged downstream of the vortex generator. arranged symmetrically. /Vortex flowmeter is a volume flowmeter that measures the volume flow of gas, steam or liquid, the volume flow of standard conditions or the mass flow based on the Karman vortex principle (árá r). And can be used as a flow transmitter in automated control systems. / Vortex flowmeter uses the principle of fluid oscillation to measure flow. When the fluid passes through the vortex flow transmitter in the pipeline, two rows of vortices are alternately generated up and down behind the vortex generator of the triangular prism, which is proportional to the flow rate. The release frequency of the vortex It is related to the average velocity of the fluid flowing through the vortex generator and the characteristic width of the vortex generator, which can be expressed by the following formula: / / where is the release frequency of the vortex, the unit is the average velocity of the fluid flowing through the vortex generator, the unit is / The characteristic width of the vortex generator, the unit is Strouhal number (br), dimensionless, and its numerical range is. / is a function of Reynolds number, . /When the Reynolds number R is within the range, the value is approximately. In the measurement, it is necessary to try to satisfy the Reynolds number of the fluid and the vortex frequency at this time. /Thus, by measuring the vortex frequency, the average velocity of the fluid flowing through the vortex generating body can be calculated, and then the flow rate can be obtained from the equation, where is the cross-sectional area of the fluid flowing through the vortex generating body.