Structure type of turbine flowmeter sensor
There are many types of sensor structures in the turbine flowmeter, here are several widely used types:
1, thrust-type turbine flow sensor: The structure of such products using plane or ball point contact, contact points and sensor axes coincide, point contact advantage is that the friction moment is very small, can be used for lower lower limit flow, but large flow wear seriously. The bearing is flat type. This type of structure is only used for small-caliber (dn≤15mm) sensors, and it is characterized by its high sensitivity.
2, reverse-push turbine flow sensor: The reverse-push structure within a certain flow range can make the impeller in the floating state, there is no contact point, no reason surface friction and wear, can prolong the use of time.
3, tangential-type turbine flow sensor: for micro-flow measurement of the turbine flow sensor. The fluid flows from the tangential direction of the impeller, impacting its blade rotation. Because the measured flow is small, in order to increase the flow of the impeller momentum, the entrance is equipped with a nozzle, you can change the nozzle aperture to adjust the flow range. The rotational speed of the impeller is detected by photoelectric method to avoid the magnetic resistance moment as the reluctance method.
4, Gas turbine flowmeter: The density of gas is far less than the density of liquid, fluid driving moment is small, gas flow sensor and liquid flow sensor in the structural parameters of a significant difference. To increase the radius of the hub, reduce the section area, so that the flow rate increased and concentrated through the blade edge. Because the flow rate is very high, to use small punch angle blades. Generally to reduce friction resistance moment, the use of rolling bearings, and the bearing system into the lubricant. It can flush out the particles on the bearing surface and prolong the bearing life. The porous reservoir can provide continuous oil to the bearing during the replacement of lubricant. The gas turbine flowmeter sensor Displays the additional gas volume compensator, which converts the actual volume flow measured by the sensor to the volume flow under the standard state by pressure and temperature.
1, thrust-type turbine flow sensor: The structure of such products using plane or ball point contact, contact points and sensor axes coincide, point contact advantage is that the friction moment is very small, can be used for lower lower limit flow, but large flow wear seriously. The bearing is flat type. This type of structure is only used for small-caliber (dn≤15mm) sensors, and it is characterized by its high sensitivity.
2, reverse-push turbine flow sensor: The reverse-push structure within a certain flow range can make the impeller in the floating state, there is no contact point, no reason surface friction and wear, can prolong the use of time.
3, tangential-type turbine flow sensor: for micro-flow measurement of the turbine flow sensor. The fluid flows from the tangential direction of the impeller, impacting its blade rotation. Because the measured flow is small, in order to increase the flow of the impeller momentum, the entrance is equipped with a nozzle, you can change the nozzle aperture to adjust the flow range. The rotational speed of the impeller is detected by photoelectric method to avoid the magnetic resistance moment as the reluctance method.
4, Gas turbine flowmeter: The density of gas is far less than the density of liquid, fluid driving moment is small, gas flow sensor and liquid flow sensor in the structural parameters of a significant difference. To increase the radius of the hub, reduce the section area, so that the flow rate increased and concentrated through the blade edge. Because the flow rate is very high, to use small punch angle blades. Generally to reduce friction resistance moment, the use of rolling bearings, and the bearing system into the lubricant. It can flush out the particles on the bearing surface and prolong the bearing life. The porous reservoir can provide continuous oil to the bearing during the replacement of lubricant. The gas turbine flowmeter sensor Displays the additional gas volume compensator, which converts the actual volume flow measured by the sensor to the volume flow under the standard state by pressure and temperature.
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