CN-122015981-A - Counter-rotating turbine flow sensor with integrated structure

CN122015981ACN 122015981 ACN122015981 ACN 122015981ACN-122015981-A

Abstract

The invention relates to the technical field of instruments and meters, in particular to a counter-rotating turbine flow sensor with an integrated structure, which comprises a shell part, a shaft system part, an electric assembly, a counter-rotating turbine flow sensor and a counter-rotating turbine flow sensor, wherein the shaft system part comprises an upstream guide plate, a transmission shaft, a conical guide piece, an upstream turbine, a middle transition guide piece, a downstream turbine, a downstream transition guide piece and a locking nut, one end of the transmission shaft is connected to the upstream guide plate, the conical guide piece, the upstream turbine, the middle transition guide piece, the downstream turbine, the downstream transition guide piece, the downstream guide plate and the locking nut are sleeved on the transmission shaft in sequence, and the shaft system part is axially locked and embedded in the shell by fastening the locking nut. The invention has compact structure, good installation adaptability, obvious energy-saving effect, improved wide range, high precision and strong medium adaptability, high reliability, strong signal synchronism and anti-interference capability, simplified production process and reduced comprehensive cost.

Inventors

Zan hao
YAN LIANG
HUANG FUJI
Zhou Shenmei
LIU JIABAO

Assignees

江苏空天测控科技有限公司
镇江龙天科技有限公司

Dates

Publication Date: 20260512
Application Date: 20260214

Claims (10)

1. A counter-rotating turbine flow sensor of unitary construction, comprising: A housing member providing flow guiding and support; The shaft system part comprises an upstream guide plate, a transmission shaft, a conical guide piece, an upstream turbine, a middle transition guide piece, a downstream turbine, a downstream transition guide piece, a downstream guide plate and a locking nut, wherein one end of the transmission shaft is connected to the upstream guide plate, and the conical guide piece, the upstream turbine, the middle transition guide piece, the downstream turbine, the downstream transition guide piece, the downstream guide plate and the locking nut are sleeved on the transmission shaft in sequence, so that the shaft system part is axially locked and embedded in the shell by fastening the locking nut; And the electrical component is arranged on the shell and is used for monitoring the rotating speed of the shaft system driven by the fluid in the shell so as to analyze the flow passing through the counter-rotating turbine flow sensor.
2. The integrated structural counter-rotating turbine flow sensor of claim 1, wherein said housing member includes a housing base for mounting said shaft tie and said electrical component and a housing cover on said housing base providing protection for said electrical component.
3. The integrated counter-rotating turbine flow sensor of claim 2, wherein the housing base includes a flow channel for mounting the shaft element for flowing a liquid therethrough to urge the shaft element to rotate, and a mounting platform on the flow channel for mounting the electrical component for detecting the shaft element rotational speed and resolving the liquid flow.
4. The integrated structure counter-rotating turbine flow sensor according to claim 3, wherein bosses are machined at two ends of the inner wall of the flow channel for mounting the shaft assembly, and a rotating speed sensor mounting hole, a temperature sensor mounting hole, a circuit board mounting hole and a shell housing mounting hole are formed in the mounting platform for mounting the electrical assembly.
5. The integrated counter-rotating turbine flow sensor of claim 3 or 4, wherein a square platform is provided on the housing enclosure, and the housing enclosure is sealingly mounted to the mounting platform by screws passing through the square platform.
6. The integrated counter-rotating turbine flow sensor according to any one of claims 1 to 4, wherein the transmission shaft is screwed into a threaded hole at one end of the upstream deflector by external threads at one end, the upstream turbine is rotatably sleeved on the transmission shaft by an embedded bearing, the downstream turbine and the upstream turbine are identical in structure, and the downstream turbine is rotatably sleeved on the transmission shaft by an embedded bearing.
7. The integrated counter-rotating turbine flow sensor of claim 3 or 4, wherein the electrical components include a sensor disposed on the mounting platform for monitoring the shaft component rotational speed and the fluid temperature in the flow passage, a flow transmitter disposed on the mounting platform in electrical communication with the sensor for receiving and processing the sensor signals and then transmitting data outwardly through the electrical connector mounted on the housing enclosure.
8. The integrated counter-rotating turbine flow sensor of claim 4, wherein the sensor comprises a rotational speed sensor and a temperature sensor, wherein the rotational speed sensor is mounted in the rotational speed sensor mounting hole, wherein the temperature sensor is mounted in the temperature sensor mounting hole, and wherein the rotational speed sensor and the temperature sensor are both electrically connected to the flow transmitter.
9. The integrated counter-rotating turbine flow sensor according to claim 8, wherein the flow transmitter comprises a signal processing element, a flow calculating element and a storage element, the signal processing element is arranged on the mounting platform, the flow calculating element is arranged on the signal processing element, the storage element is arranged on the flow calculating element and is used for receiving and processing a rotating speed signal and a temperature signal transmitted by the sensor respectively, and based on a built-in flow calculating algorithm, the rotating speed signal and the temperature signal are used for flow calculation, a physical database, algorithm formula parameters and calculated flow data which are needed in the flow calculating algorithm are stored, finally, the flow signal is transmitted out through the connected electric connector, and the flow transmitter is internally provided with a real-time self-diagnosis algorithm based on a double turbine rotating speed association relation.
10. The integrated counter-rotating turbine flow sensor of claim 9, wherein the signal processing element is mounted on the mounting platform by a first circuit mount mounted thereon, the flow calculation element is mounted on the signal processing element by a second circuit mount mounted thereon, the storage element is mounted on the flow calculation element by a circuit mount bolt mounted thereon, and the signal processing element, the flow calculation element, and the storage element are electrically connected by a flexible circuit board.

Description

Counter-rotating turbine flow sensor with integrated structure Technical Field The invention relates to the field of instruments and meters, in particular to a counter-rotating turbine flow sensor with an integrated structure. Background The turbine flowmeter is a speed type flow measuring instrument widely applied to the fields of industrial process control, energy metering and fluid monitoring, and the flow is calculated by detecting the frequency of fluid driving a turbine to rotate, so that the turbine flowmeter has the advantages of high measuring precision, quick response, relatively simple structure and the like. Conventional turbine flow meters typically employ a single turbine structure, i.e., a fluid flowing through a turbine rotor, the rotational speed of the turbine being proportional to the flow rate, the rotational speed of the turbine being sensed by a magneto-electric, photo-electric, or like sensor and converted into a flow signal. With the continuous improvement of industrial measurement requirements, particularly in the scenes of wide range, multi-medium adaptability and high reliability, the single vortex flowmeter gradually shows some inherent limitations, namely firstly, the measurement range is obviously influenced by factors such as turbine bearing friction, fluid viscosity change and the like, the phenomenon of sensitivity reduction or even incapacity of starting easily occurs in low-flow-rate or high-viscosity media, secondly, the single turbine structure is sensitive to fluid flow-rate distribution, long front and rear straight pipe sections are required to ensure fully developed flow states, the application of the single turbine structure in occasions with limited installation space is limited, and in addition, the whole measurement system is completely required to be improved in reliability once the turbine is jammed or a sensor fails due to the fact that the single sensor signal is only relied on. To overcome the above problems, there has been proposed a counter-rotating turbine flowmeter in which two turbines having different characteristics (for example, turbines having different blade angles or materials) are disposed in a flow path, and a viscosity change is compensated, a turndown ratio is enlarged, or a self-diagnosis function is realized by comparing a difference in rotational speeds of the two turbines. However, the existing counter-rotating turbine flowmeter mostly adopts a split type or serial type structure, and the two turbines are usually independently installed on different measuring sections or are associated through a complex transmission mechanism, so that the overall structure is bulky, the volume is increased, the pressure loss is increased, and the difficulty of mechanical assembly and calibration is increased. Meanwhile, the split type design often needs two sets of independent signal detection and processing units, so that the system cost is increased, and the signal synchronization and the integrated processing are more complex. In addition, the conventional counter-rotating turbine flowmeter is mainly dependent on the fact that pulse signals of two turbines are respectively collected and then subjected to external operation in signal processing, the advantages of integrated collection and real-time association analysis are not fully utilized, dynamic response is delayed, and misjudgment due to signal interference is easy under the working conditions of strong vibration and multiple impurities. Therefore, how to realize the high compactness of the double-turbine structure, the integration of signal acquisition and the intellectualization of fault diagnosis without remarkably increasing the pressure loss and the space occupation becomes a technical problem to be solved in the field of turbine flowmeters. In summary, the integrated counter-rotating turbine flowmeter has the advantages of compact structure, high reliability and adaptability to wide-range fluid working conditions, and has important significance in improving the comprehensive performance and applicability of flow measurement. Disclosure of Invention In order to solve the technical problems in the prior art, the embodiment of the invention provides a counter-rotating turbine flow sensor with an integrated structure. The technical scheme is as follows: A counter-rotating turbine flow sensor of unitary construction comprising: A housing member providing flow guiding and support; The shaft system part comprises an upstream guide plate, a transmission shaft, a conical guide piece, an upstream turbine, a middle transition guide piece, a downstream turbine, a downstream transition guide piece, a downstream guide plate and a locking nut, wherein one end of the transmission shaft is connected to the upstream guide plate, and the conical guide piece, the upstream turbine, the middle transition guide piece, the downstream turbine, the downstream transition guide piece, the downstream guide plate and the