A Cylindrical Vortex-Induced Velocity and Vibration Sensor
A sensor and speed measurement technology, applied in the field of sensors, can solve the problems of affecting the natural frequency of heat exchange tubes, failing to meet the installation requirements of external sensors, and interfering with the external flow field of heat exchange tubes
Active Publication Date: 2021-03-23
BEIJING INST OF STRUCTURE & ENVIRONMENT ENG
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Problems solved by technology
On the one hand, the way of installing sensors outside the heat exchange tubes will interfere with the external flow field of the heat exchange tubes, forming additional fluid excitation to generate "false" vibration excitation; on the other hand, the sensor installed outside the heat exchange tubes is Additional mass, which affects the natural frequency of the tubes and thus the true vibration response
In addition, many inner layer heat exchange tubes cannot be tested for flow-induced vibration because they cannot meet the installation requirements of external sensors
Method used
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[0026] See Figure 1-3 According to a columnar vortex excise measurement sensor of the present invention, the cylindrical 1 end has a connecting head 12 in a cylinder 1; the outer wall of the cylinder 1 is disposed along the central axis of the cylinder 1, and the speed static pressure hole 2 is provided. The pore body of the static pressure hole 2 is in the radial distribution of the cylinder 1; the first discharge static pressure hole 2a is located in the front hysteresis position, the second row speed static pressure hole 2a and the third row speed static pressure hole 2c The pore body of the first row speed static pressure hole 2a is provided in an ± 45 ° angle of the pore body; the three-row speed static pressing hole 2 is connected to the corresponding speed chamber 8, and the three speed homogenesis cavity 8 is connected to the upper end. Head 12, and the center axis of the three speed spin chamber 8 is parallel to the central axis of the cylinder 1. The three speed homogen...
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The invention provides a columnar vortex-induced velocity measuring and vibration measuring sensor for a heat exchange tube. Two ends of a columnar body are provided with connection heads for connection; three rows of velocity measuring static pressure holes distributed along the central axis of the columnar body are formed in the outer wall of the columnar body; two rows of vibration measuring main sensing pressure holes distributed along the along the central axis of the columnar body and two rows of vibration measuring auxiliary sensing pressure holes distributed along the along the centralaxis of the columnar body are formed in the outer wall of the columnar body, + / -85-degree angles being formed between the two rows of vibration measuring main sensing pressure holes and the first rowof velocity measuring static pressure holes, and + / -115-degree angles being formed between the two rows of vibration measuring auxiliary sensing pressure holes and the first row of velocity measuringstatic pressure holes; after being assembled, the sensor forms a part of the heat exchange tube without causing additional disturbance to a surrounding flow field, and can truly measure a vortex-induced frequency as well as the velocity and direction angle of local incoming flow when a fluid washes the heat exchange tube.
Description
Technical field [0001] The present invention is directed to a columnar vortex excise measurement sensor, belonging to the field of sensors. Background technique [0002] The shell heating heat exchanger has the advantages of simple structure, high heat transfer surface, can withstand high pressure high temperature, convenient operation management, and high reliability and extensive adaptability, chemical, petrochemical, power and nuclear energy and other industries Get universal applications. The heat transfer tube in the housing heat exchanger is in the environment of the primary side coolant and the secondary side soda mixture, while as a pressure boundary of a circuit coolant, there is a risk of vibration, abrasion, resulting in flowing vibration. Risk. In recent years, with the increase in the increasing fluid flow rate of the housing heat exchanger, the increase in heat exchange tube flexibility increases, the incidence of the heat exchange tube is gradually, and the acciden...
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IPC IPC(8): G01P3/12G01H13/00
Inventor 马平昌李红张良林淡李亚男刘德军赵威
Owner BEIJING INST OF STRUCTURE & ENVIRONMENT ENG