阅读说明：本技术 一种液力透平泵测试系统及方法 (Hydraulic turbine pump testing system and method ) 是由 宋力 张建军 翟霆 王勇军 王勇 高鹏 于 2020-07-20 设计创作，主要内容包括：本公开涉及一种液力透平泵测试系统及方法,包括增压泵、液力透平泵和测功机,所述增压泵与外界水源连通,所述增压泵能够将机械能转化成液体动能；所述液力透平泵能够将增压泵输出的液体动能转化成机械能并向测功机输出,所述测功机能够消耗液力透平泵输出的机械能,并测得液力透平泵的输出功率。(The system comprises a booster pump, a hydraulic turbine pump and a dynamometer, wherein the booster pump is communicated with an external water source and can convert mechanical energy into hydraulic kinetic energy; the hydraulic turbine pump can convert the liquid kinetic energy output by the booster pump into mechanical energy and output the mechanical energy to the dynamometer, and the dynamometer can consume the mechanical energy output by the hydraulic turbine pump and measure the output power of the hydraulic turbine pump.)

1. A hydraulic turbine pump testing system, comprising:

the booster pump is communicated with an external water source and can convert mechanical energy into liquid kinetic energy;

the hydraulic turbine pump can convert the kinetic energy of the liquid output by the booster pump into mechanical energy and output the mechanical energy to the dynamometer,

the dynamometer can consume the mechanical energy output by the hydraulic turbine pump and measure the output power of the hydraulic turbine pump.

2. The hydraulic turbine pump testing system as recited in claim 1, wherein an inlet of the booster pump is in communication with an external water source, an outlet of the booster pump is in communication with an inlet of the hydraulic turbine pump, and an outlet of the hydraulic turbine pump is in communication with an external water source.

3. The hydraulic turbine pump testing system as recited in claim 1, wherein the booster pump inlet and outlet are each provided with a pressure sensor.

4. The hydraulic turbine pump test system as recited in claim 3, wherein a flow sensor is provided at an inlet of the hydraulic turbine pump, the flow sensor being capable of measuring a flow of fluid into the hydraulic turbine pump.

5. The hydraulic turbine pump testing system of claim 4, further comprising a controller configured to read the pressure sensor and the flow sensor and control the speed of the motor to regulate the flow and pressure of the fluid flowing into the hydraulic turbine pump.

6. The hydraulic turbine pump testing system of claim 1, wherein the input shaft of the dynamometer is fixed coaxially with the output shaft of the hydraulic turbine pump.

7. The hydraulic turbine pump testing system as recited in claim 2, wherein the external water source is disposed in a water tank, one opening of the water tank is communicated with a water inlet of the booster pump, and the other opening is communicated with a water outlet of the dynamometer.

8. A test method of a hydraulic turbine pump is characterized by comprising the following steps,

assembling a hydraulic turbine pump test system to prepare an external water source;

starting the motor, driving the booster pump to rotate by using the motor, and conveying high-pressure water to the hydraulic turbine pump by using the booster pump;

inputting high-pressure water into a hydraulic turbine pump, converting the kinetic energy of liquid in the high-pressure water into mechanical energy by the hydraulic turbine pump, and conveying the mechanical energy to a dynamometer;

the dynamometer measures the mechanical energy value output by the hydraulic turbine pump;

and collecting electric energy consumed by the motor, and calculating the ratio of the output power of the booster pump to the output mechanical energy of the hydraulic turbine pump to represent the conversion efficiency of the hydraulic turbine pump.

9. The method as claimed in claim 8, wherein the dynamometer booster pump is preheated before testing to ensure stability of system transfer efficiency.

10. The method as claimed in claim 8, wherein when calculating the conversion efficiency of the hydraulic turbine pump, parameters such as liquid flow, liquid pressure, and the rotation speed of the booster pump need to be changed to obtain the conversion efficiency of the hydraulic turbine pump under different working conditions.

Technical Field

The disclosure belongs to the technical field of testing, and particularly relates to a hydraulic turbine pump testing system and method.

Background

For a long time, industrial production consumes a large amount of energy, such as petroleum, coal carbon, natural gas and the like, in industries with large energy consumption, a large amount of high-pressure fluid exists in the industries of petrochemical industry, petroleum processing, coal chemical industry, seawater desalination, metallurgy, power generation and the like, the high-pressure fluid is directly discharged after pressure reduction and depressurization, and a large amount of energy contained in the high-pressure fluid is wasted. At present, in order to fully utilize the part of the high-pressure fluid, a hydraulic turbine pump is generally arranged at the tail end of the system discharge, and the hydraulic turbine pump is used for converting the liquid kinetic energy of the high-pressure fluid into mechanical energy for recycling. The energy conversion efficiency is an important parameter to be considered when the hydraulic turbine pump is developed, and a test system is required to be used for testing after the design is completed.

The inventor has appreciated that in the conventional hydraulic turbine pump test system, one of which is shown in fig. 2 of the specification, there are two closed-loop pipelines, in the first closed-loop pipeline, the booster pump is used to convert mechanical energy into fluid kinetic energy, the hydraulic turbine pump is used to convert the fluid kinetic energy into mechanical energy and transmit the mechanical energy to the load pump through mechanical connection, the load pump is arranged in the second closed-loop pipeline, the load pump is used to convert the mechanical energy into fluid kinetic energy, the ratio of the fluid kinetic energy converted by the load pump to the electric energy input by the motor at the booster pump is measured, and the energy efficiency conversion efficiency of the turbine pump is calculated.

In another test system, as shown in fig. 3, a torque meter and a motor are added between a turbine pump and a load pump on the basis of the test system.

However, in the two testing systems, the power of the load pump is used for indirectly representing the power of the hydraulic turbine pump, the calculation of the energy conversion efficiency belongs to an indirect calculation mode, and two closed-loop pipeline systems are adopted, so that the two testing systems have the defects of large occupied area, high manufacturing cost, low measurement precision and instability.

Disclosure of Invention

The purpose of the disclosure is to provide a hydraulic turbine pump test system and a method, which can reduce the space occupation of the hydraulic turbine pump test system, reduce the manufacturing cost and improve the measurement precision.

The first aspect of the disclosure provides a hydraulic turbine pump testing system, which comprises a booster pump, a hydraulic turbine pump and a dynamometer, wherein the booster pump is communicated with an external water source and can convert mechanical energy into hydraulic kinetic energy; the hydraulic turbine pump can convert the liquid kinetic energy output by the booster pump into mechanical energy and output the mechanical energy to the dynamometer, and the dynamometer can consume the mechanical energy output by the hydraulic turbine pump and measure the output power of the hydraulic turbine pump.

As a further improvement of the first aspect, the inlet and the outlet of the booster pump are provided with pressure sensors, respectively. The inlet of the hydraulic turbine pump is provided with a flow sensor, and the flow sensor can measure the flow of liquid entering the hydraulic turbine pump.

As a further improvement of the first aspect, the hydraulic turbine pump further comprises a controller, wherein the controller can read the values of the pressure sensor and the flow sensor and control the rotating speed of the motor so as to regulate the flow and the pressure of the liquid flowing into the hydraulic turbine pump.

A second aspect of the present disclosure provides a method for testing a hydraulic turbine pump, including the steps of,

assembling a hydraulic turbine pump test system to prepare an external water source;

starting the motor, driving the booster pump to rotate by using the motor, and conveying high-pressure water to the hydraulic turbine pump by using the booster pump;

inputting high-pressure water into a hydraulic turbine pump, converting the kinetic energy of liquid in the high-pressure water into mechanical energy by the hydraulic turbine pump, and conveying the mechanical energy to a dynamometer;

the dynamometer measures the mechanical energy value output by the hydraulic turbine pump;

and collecting electric energy consumed by the motor, and calculating the ratio of the output power of the booster pump to the output mechanical energy of the hydraulic turbine pump to represent the conversion efficiency of the hydraulic turbine pump.

The beneficial effects of one or more of the above technical solutions are as follows:

measuring the pressure at the inlet and the outlet of the turbine pump, calculating the kinetic energy of the liquid absorbed by the hydraulic turbine pump, and directly measuring the output power of the hydraulic turbine pump by using a dynamometer; the input power and the output power of the hydraulic turbine pump are directly measured, and compared with a mode of indirectly calculating the output power through a load pump, the method reduces a power transmission link, saves the length of a pipeline and the number of structures, and further reduces the influence of energy transmission loss on the measurement precision.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.

FIG. 1 is a schematic diagram of the overall structure in an embodiment of the present disclosure;

FIG. 2 is a schematic diagram of a first hydraulic turbine pump test system of the background art of the present disclosure;

fig. 3 is a schematic structural diagram of a second hydraulic turbine pump test system in the background art of the present disclosure.

Wherein, 1, a booster pump; 2. a turbine pump; 3. a dynamometer; 4. a pressure sensor; 5. an electric motor; 6. a flow sensor.

1A, a booster pump; 2A, a pressure flow sensor assembly; 3A, a turbine pump; 4A overdrive clutch; 5A, a load pump; 6A, a pressure flow sensor assembly; 7A, a pressure sensor; 8A, a motor; 9A, a pressure sensor; 10A pressure sensor.

1B, a booster pump; 2B, a pressure flow sensor assembly; 3B, a turbine pump; 4B, an over-speed clutch; 5B, a torque meter; 6B, a motor; 7B, a load pump; 8B, a motor; 9B, a pressure sensor; 10B, a pressure sensor; 11B, a pressure sensor; 12B, a pressure flow sensor assembly.

Detailed Description

It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

As described in the background art, the description attached to fig. 2 is a first test system with a turbo pump, first, a test medium conveying pipeline is two closed loops and is not communicated with each other, a booster pump 1A is driven by a motor 8A to boost medium liquid, the high-pressure liquid collects high-pressure energy through a turbo pump 3A, the liquid is decompressed to a normal state and flows back, the high-pressure energy collected by the turbo pump is converted into mechanical energy, the mechanical energy is transmitted to a load pump 5A through an overspeed clutch 4A (note: the load pump is a single closed loop pipeline), and the mechanical energy is converted into liquid kinetic energy through the load pump, which is a test principle. The test principle is summarized as follows: electric energy → mechanical energy (supercharging) → liquid kinetic energy → mechanical energy (turbine pump) → liquid kinetic energy (load pump), and finally the ratio of the liquid kinetic energy converted by the load pump to the initial applied electric energy is measured, and the energy efficiency conversion efficiency of the turbine pump is calculated.

To effect measurement of system parameters, the test system has a pressure flow sensor assembly 2A illustrated therein; a pressure flow sensor assembly 6A; a pressure sensor 7A; a motor 8A; a pressure sensor 9A; the pressure sensor 10A.

The test system ensures the test precision as follows:

1. the electrical parameter tester tests the applied electrical energy (initial energy).

2. The pressure at the inlet and outlet of the booster pump and the flow instrument need to calculate the pressure (height) of the inlet water head.

3. The pressure at the inlet and the outlet of the turbine pump is calculated, and the pressure (height) of the outlet water head is calculated to determine the kinetic energy of the liquid absorbed by the turbine pump so as to complete the first step of measurement.

4. The turbine pump applies mechanical energy to the load pump through the overspeed clutch to measure the pressure of the inlet and the outlet of the load pump, calculates the height difference of the water heads of the inlet and the outlet, measures the flow and the rotating speed, and calculates the water power of the load pump, thereby completing the measurement in the second step, and then converts the mechanical energy into the electrical energy, and converts the mechanical energy into the liquid kinetic energy, namely the water power. And finally, calculating the energy efficiency conversion efficiency of the turbine pump, wherein the energy loss of the overspeed clutch of the system cannot be determined, the length of the pipeline is designed according to GB/T3216, the pressure taking length of inlet and outlet pressure is 2D, the flow straight pipe section is 12D, the resistance loss of two groups of pipelines can be ignored, and the precision of two parts of measuring instruments is questioned. And then the system accumulated error and the overlong connection path (the rigid connection precision of the test system is highest).