Axial flow pump internal pressure pulsation measuring mechanism

Abstract

The utility model relates to an axial flow pump internal pressure pulsation measuring mechanism which comprises a pump shaft and an impeller which are arranged in an axial flow pump shell, and the impeller is installed at one end of the pump shaft and synchronously rotates along with rotation of the pump shaft. A brushless signal transmission module is installed at the other end of the pump shaft, a fixing support is further installed at the end, provided with the impeller, of the pump shaft, the fixing support is located at the position, close to the fixing support, of the pump shaft between the brushless signal transmission module and the impeller, and the fixing support synchronously rotates along with rotation of the pump shaft. A pressure pulsation sensor is installed on the fixing support, the pressure pulsation sensor is installed on the side edge of the position of the fixing support, and the pressure pulsation sensor is connected with the brushless signal transmission module through a wire. A stator is fixedly installed on the inner wall of the axial flow pump shell, a signal acquisition module is fixed to the stator, and the signal acquisition module is in brushless connection with the brushless signal transmission module. According to the utility model, efficient, stable and accurate pressure monitoring of the interior of the axial flow pump can be realized.

Description

Technical Field

[0001] The utility model relates to the technical field of fluid machinery monitoring, and specifically relates to a measuring mechanism for internal pressure pulsation of an axial flow pump. Background Art

[0002] During the operation of large axial flow pumps and mixed flow pumps, internal pressure pulsation is an important factor affecting their operation efficiency, stability, and reliability. Traditional pressure measurement devices usually need to be wired to the rotating impeller, which is not only easily interfered by the high-speed rotation of the pump, but also causes signal distortion, cable wear, and increased operation complexity. Therefore, it is of great significance to develop a pressure pulsation measuring mechanism that does not require direct wiring and is stable and reliable. Summary of the Utility Model

[0003] The purpose of the utility model is to solve the above problems and provide a measuring mechanism for internal pressure pulsation of an axial flow pump with a simple structure and convenient use.

[0004] The utility model provides the following technical solution: A measuring mechanism for internal pressure pulsation of an axial flow pump, including a pump shaft and an impeller placed inside the outer shell of the axial flow pump. The impeller is installed at one end of the pump shaft, and the impeller rotates synchronously with the rotation of the pump shaft. Its characteristics are:

[0005] A brushless signal transmission module is installed at the other end of the pump shaft. A fixed bracket is also installed at the end of the pump shaft where the impeller is located. And on the pump shaft close to the fixed bracket between the brushless signal transmission module and the impeller, the fixed bracket rotates synchronously with the rotation of the pump shaft;

[0006] A number of pressure pulsation sensors are installed on the fixed bracket. The number of pressure pulsation sensors is installed on the side of the fixed bracket, and the pressure pulsation sensors are connected to the brushless signal transmission module through wires;

[0007] A stator is fixedly installed on the inner wall of the outer shell of the axial flow pump, and a signal acquisition module is fixed on the stator. The signal acquisition module is brushless-connected to the brushless signal transmission module.

[0008] A guide vane is fixed on the inner wall of the outer shell of the axial flow pump, and the pump shaft passes through the guide vane; the fixed bracket is located on the pump shaft between the impeller and the guide vane.

[0009] A cavity is provided inside the pump shaft, and the wires are placed inside the cavity, and both ends of the wires pass through the cavity and are respectively connected to the pressure pulsation sensors and the brushless signal transmission module.

[0010] A number of pressure pulsation sensors are evenly installed on the side of the fixed bracket.

[0011] The structure of the utility model is reasonable, simple and scientific. Through the utility model, it is installed at one end of the pump shaft where the impeller is provided through a fixed bracket (and the fixed bracket is on the pump shaft between the brushless signal transmission module and the impeller, close to the fixed bracket), and by using the brushless signal transmission technology, the pressure pulsation data during the operation of the impeller is transmitted to the external acquisition device, realizing efficient, stable and accurate pressure monitoring.

[0012] Structurally, the fixed bracket is installed at one end of the pump shaft where the impeller is provided and is connected to the pump shaft. A number of pressure pulsation sensors are evenly installed on the side of the fixed bracket, and through layout optimization, it is ensured to measure the pressure changes in the key areas of the flow field.

[0013] The signal acquisition module is brushless-connected to the brushless signal transmission module, and the signal transmission method adopts a non-contact brushless signal transmission method. The fixed bracket can also be designed modularly in actual design, which is convenient for quick installation and disassembly and adapts to pump shafts of different sizes. A sealed and corrosion-resistant design can be adopted. The pressure pulsation sensors and the signal acquisition module are encapsulated with waterproof and corrosion-resistant materials and can be applicable to complex working conditions such as sand-containing water and seawater.

[0014] When in use, the pressure pulsation sensors obtain the pressure pulsation data inside the axial flow pump, and then transmit it to the brushless signal transmission module through wires. And because the brushless signal transmission module and the signal acquisition module are brushless-connected, the pressure pulsation data is transmitted to the signal acquisition module again, and through the signal acquisition module, the pressure pulsation data can be transmitted to external modules such as external reception, storage, and processing.

[0015] Adopting the brushless method to achieve efficient transmission of pressure signals avoids the problems of wear and signal distortion in the traditional wiring method.

[0016] The fixed bracket is on the pump shaft between the brushless signal transmission module and the impeller, close to the fixed bracket, and the pressure pulsation sensors are installed at the position of the fixed bracket close to the surface of the impeller, which can realize real-time and accurate monitoring of the pressure pulsation in the key flow field area.

[0017] The device of the utility model can be widely applied to the operation monitoring scenarios of various fluid mechanical equipment such as axial flow pumps and mixed flow pumps, and adapts to a variety of complex media and operating conditions.

[0018] In summary, through the utility model, efficient, stable and accurate pressure monitoring of the inside of the axial flow pump can be realized, which has great market application and promotion value. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the utility model;

[0020] Figure 2 It is a structural schematic diagram of the installation position part of the pressure pulsation sensor on the fixed bracket in the utility model;

[0021] In the figure: 1 pump shaft, 2 impeller, 3 brushless signal transmission module, 4 fixed bracket, 5 pressure pulsation sensor, 6 signal acquisition module, 7 guide vane. Specific implementation mode

[0022] The following makes a detailed description of the present utility model in conjunction with the accompanying drawings and the description of the drawings.

[0023] An internal pressure pulsation measurement mechanism of an axial flow pump includes a pump shaft 1 and an impeller 2 placed inside the axial flow pump housing. The impeller 2 is installed at one end of the pump shaft 1, and the impeller 2 rotates synchronously with the rotation of the pump shaft 1; a brushless signal transmission module 3 is installed at the other end of the pump shaft 1. A fixed bracket 4 is also installed at the end of the pump shaft 1 where the impeller 2 is located. And the fixed bracket 4 is located on the pump shaft 1 between the brushless signal transmission module 3 and the impeller 2 and close to the fixed bracket 4. The fixed bracket 4 rotates synchronously with the rotation of the pump shaft 1; a plurality of pressure pulsation sensors 5 are installed on the fixed bracket 4, and the plurality of pressure pulsation sensors 5 are evenly installed on the side of the fixed bracket 4. The pressure pulsation sensors 5 are connected to the brushless signal transmission module 3 through wires; a stator is fixedly installed on the inner wall of the axial flow pump housing, and a signal acquisition module 6 is fixed on the stator. The signal acquisition module 6 is brushlessly connected to the brushless signal transmission module 3.

[0024] Further, a guide vane 7 is fixed on the inner wall of the axial flow pump housing, and the pump shaft 1 passes through the guide vane 7; the fixed bracket 4 is located on the pump shaft 1 between the impeller 2 and the guide vane 7.

[0025] A cavity is provided in the pump shaft 1, the wires are placed in the cavity, and both ends of the wires pass through the cavity and are respectively connected to the pressure pulsation sensors 5 and the brushless signal transmission module 3.

[0026] The above examples have made a detailed description and introduction of the present utility model, but the present utility model is not limited to the above specific implementation examples. Any modification or variation based on the present utility model belongs to the scope of protection required by the present utility model.

Claims

1. An internal pressure pulsation measurement mechanism for an axial flow pump, comprising a pump shaft (1) and an impeller (2) placed inside the housing of the axial flow pump. The impeller (2) is installed at one end of the pump shaft (1), and the impeller (2) rotates synchronously with the rotation of the pump shaft (1). The characteristics are as follows: At the other end of the pump shaft (1), a brushless signal transmission module (3) is installed. At the end of the pump shaft (1) where the impeller (2) is provided, a fixed bracket (4) is also installed. And on the pump shaft (1) close to the fixed bracket (4) between the brushless signal transmission module (3) and the impeller (2), the fixed bracket (4) rotates synchronously with the rotation of the pump shaft (1). On the fixed bracket (4), a plurality of pressure pulsation sensors (5) are installed. The plurality of pressure pulsation sensors (5) are installed on the side of the fixed bracket (4), and the pressure pulsation sensors (5) are connected to the brushless signal transmission module (3) via wires. A stator is fixedly installed on the inner wall of the axial flow pump housing, and a signal acquisition module (6) is fixed on the stator. The signal acquisition module (6) is brushlessly connected to the brushless signal transmission module (3).

2. The internal pressure pulsation measuring mechanism of an axial flow pump according to claim 1, characterized in that: A guide vane (7) is fixed on the inner wall of the axial flow pump housing, and the pump shaft (1) passes through the guide vane (7). The fixed bracket (4) is located on the pump shaft (1) between the impeller (2) and the guide vane (7).

3. The internal pressure pulsation measuring mechanism of an axial flow pump according to claim 1, characterized in that: A cavity is provided inside the pump shaft (1), and the wires are placed inside the cavity, and both ends of the wires pass through the cavity and are respectively connected to the pressure pulsation sensors (5) and the brushless signal transmission module (3).

4. The internal pressure pulsation measuring mechanism of an axial flow pump according to claim 1, characterized in that: The plurality of pressure pulsation sensors (5) are evenly installed on the side of the fixed bracket (4).

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