An experimental system of a water flow experiment table

Abstract

The application discloses a kind of experimental systems of water flow test bench, it is related to water flow experimental equipment technical field, including water source system, booster system, pressure regulating system, experimental area, backwashing system and weighing system, the output of water source system is connected to booster system, the output of booster system is connected to pressure regulating system, pressure regulating system is connected to experimental area, weighing system is set in the lower end of experimental area, backwashing system is connected to booster system, backwater pipeline is provided in water source system, booster system, pressure regulating system, backwashing system and weighing system are connected to backwater pipeline respectively.The application can accurately control water flow input test piece to carry out flow test.

Description

Technical Field

[0001] This invention relates to the field of water flow test equipment technology, specifically to an experimental system for a water flow test bench. Background Technology

[0002] The production process of the C-7 engine fuel supply system requires water flow rate testing. Both the main pipe flow rate and the flow rate of individual injection holes need to be calibrated in the condition of the component's injection rod and the component's injection ring. Due to current limitations in the machining accuracy of the injection holes, and the difference in flow resistance between the component and component states, the flow rate calibration process requires repeated grinding and testing of a large number of injection holes. There is an urgent need to build a new water flow rate testing platform to meet production requirements, while simultaneously addressing the problems with the existing testing platform during calibration and improving the accuracy of flow rate measurement. Summary of the Invention

[0003] The purpose of this invention is to provide an experimental system for a water flow test bench, addressing the shortcomings of existing technologies.

[0004] To achieve the above objectives, the present invention adopts the following solution:

[0005] In this application, the experimental specimen is installed in the experimental area during the deployment process. The backwashing experimental specimen is installed in the pressure box of the backwashing system, which includes a water source system, a pressurization system, a pressure regulating system, an experimental area, a backwashing system, and a weighing system. The output end of the water source system is connected to the pressurization system, the output end of the pressurization system is connected to the pressure regulating system, the pressure regulating system is connected to the experimental area, the weighing system is located at the lower end of the experimental area, the backwashing system is connected to the pressurization system, and a return water pipeline is provided in the water source system. The pressurization system, pressure regulating system, backwashing system, and weighing system... The system is connected to the return water pipeline. The water source system is started, and the medium water is supplied to the pressurization system through the water source system. After the pressurization system pressurizes the medium water, it is sent to the pressure regulating system. After the pressure regulating system regulates the medium water to an appropriate pressure according to the specified requirements, it is sent to the test area. The flow rate test is carried out on the test specimens in the test area. The flow rate data of the test specimens is calculated by weighing the outflowing medium water through the weighing system. The pressure regulating system controls the medium water at a specified pressure to be sent to the backwashing system, and the backwashing test specimens in the backwashing system are backwashed.

[0006] Furthermore, the water source system also includes a return water tank, a return water pump, and a water storage tank. The return water pipeline is connected to the return water tank, and the return water pump is connected between the return water tank and the water storage tank. During the experiment, the medium water discharged from the pressurization system, pressure regulation system, backwashing system, and weighing system all flows into the return water pipeline. The return water pipeline guides the medium water to the return water tank, and the return water pump pumps the medium water in the return water tank to the water storage tank for reuse.

[0007] Furthermore, the water source system also includes a liquid level sensor, which is installed in the water storage tank to detect the medium water in the water storage tank.

[0008] Furthermore, the water source system also includes a filter, which is installed at the input end of the return water pump. The filter has a filtration accuracy of 10μm, thereby ensuring the cleanliness of the medium water and preventing impurities in the water from damaging subsequent system equipment.

[0009] Furthermore, the volume of the water storage tank meets the requirements of a maximum single flow rate of 5.267 kg / s and a time of 5 minutes. Considering the margin in the use of the water storage tank volume, the volume of the water storage tank is taken as 3 m³. 3 .

[0010] Furthermore, the water source system also includes a cooler and a cooling water pump. The cooler is connected to the water storage tank, and the cooling water pump connects the water storage tank and the cooler. The cooler cools the water in the water storage tank, thereby preventing the temperature of the medium water from being too high and affecting the normal operation of the subsequent system.

[0011] Furthermore, the cooler adopts an air-cooled surface cooler, in which the medium water flows in a closed heat dissipation pipe, and the heat of the water medium is transferred to the air by the airflow driven by the fan, thereby achieving the purpose of cooling.

[0012] Furthermore, the backwashing system includes a backwashing valve, a pressure tank, and a valve. The backwashing valve and the valve are both connected to the pressure regulating system. The output end of the backwashing valve is connected to the pressure tank, and the output ends of the pressure tank and the valve are both connected to the return water pipeline.

[0013] The advantages of this invention compared to the prior art are:

[0014] In this equipment, the medium water is supplied to the pressurization system through the water source system. After being pressurized by the pressurization system, the medium water is delivered to the pressure regulating system. After being regulated by the pressure regulating system, the medium water is adjusted to an appropriate pressure according to the specified requirements and then sent to the test area. Flow tests are conducted on the test specimens in the test area. The flow rate data of the test specimens is calculated by weighing the outflowing medium water through the weighing system. The mass of water discharged from the test specimen within a certain period of time (one minute or two minutes) is measured by the weighing system, thereby accurately calculating the flow rate value of a single nozzle. During the experiment, multiple sets of weighing systems can be set up to simultaneously measure multiple nozzles. Attached Figure Description

[0015] Figure 1 A system flowchart for a water flow test bench;

[0016] Figure 2 Here is a system flow diagram of the backwashing system;

[0017] Figure 3 A system flowchart for the water source system;

[0018] Figure 4 The system flow diagram for the booster system;

[0019] Figure 5 This is a system flowchart of the voltage regulation system. Detailed Implementation

[0020] An experimental system for a water flow test bench includes a water source system, a pressurization system, a pressure regulating system, an experimental zone, a backwashing system, and a weighing system. The output of the water source system is connected to the pressurization system, the output of the pressurization system is connected to the pressure regulating system, and the pressure regulating system is connected to the experimental zone. The test specimen is installed in the experimental zone. The water source system supplies water to the pressurization system for pressurization and then outputs it to the pressure regulating system. The pressure regulating system generates a fixed amount of water pressure and discharges it into the test specimen in the experimental zone. The weighing system is located at the lower end of the experimental zone. The weighing system measures the mass of water discharged from the test specimen over a period of time (one minute or two minutes) to calculate the flow rate of a single nozzle. The backwashing system is connected to the pressurization system. The pressurization system delivers water to the backwashing system for backwashing experiments on the workpiece. The water source system is equipped with a return water pipeline. The pressurization system, pressure regulating system, backwashing system, and weighing system are all connected to the return water pipeline. The return water pipeline recovers the water discharged from each system and transports it back to the water source system for reciprocating experiments.

[0021] Preferably, the water source system further includes a return water tank, a return water pump, a water storage tank, and a level sensor. The return water pipeline is connected to the return water tank, and the return water pump is connected between the return water tank and the water storage tank. The return water pump pumps water from the return water tank to the water storage tank. The level sensor is installed in the water storage tank to detect the water level in the water storage tank in real time, thereby preventing the water level in the tank from being too high or too low.

[0022] To prevent excessive impurities in the water in the return water tank from affecting subsequent reuse, a filter is installed at the input end of the return water pump. The filter has a filtration accuracy of 10μm.

[0023] The water storage tank's volume meets the requirements of a maximum single flow rate of 5.267 kg / s and a duration of 5 minutes. Considering a margin in the tank's volume, a volume of 3 m³ is chosen. 3 ;

[0024] To improve the accuracy and stability of the experiment, pure water was used as the experimental medium.

[0025] The water supply system circulates water through various systems. High-pressure water pumps and overflow valves after the pumps cause the water medium to heat up. During the equipment's experiments, the temperature of the experimental medium, pure water, is required to not exceed 30°C. Therefore, a cooler and a cooling water pump are added to the water supply system. The cooler is connected to the water storage tank, and the cooling water pump connects the water storage tank and the cooler. The cooling water pump draws water from the water storage tank to the cooler for cooling. After cooling, the water is returned to the water storage tank for reuse. The cooler is an air-cooled surface cooler. The medium water flows in a closed heat dissipation pipe, and the fan drives the airflow to exchange the heat of the water medium with the air, thereby achieving the cooling purpose.

[0026] The weighing system consists of a single-nozzle flow collection fixture, a collection hose, a collection tank, a weighing sensor, a solenoid valve, and a data acquisition system. Water ejected from a single nozzle is collected by the nozzle flow collection fixture, then enters the collection tank through the hose. The mass value is measured by the weighing sensor, and the flow rate of the single nozzle is calculated by the computer software system. To improve work efficiency and consistency of flow measurement conditions for each nozzle on a single rod, under feasible experimental fixture conditions, the flow rates of all nozzles on a single spray rod are obtained in one experiment. Therefore, 32 single-nozzle flow measurement channels are configured to obtain the flow rate data of all nozzles on one spray rod in one experiment, which can improve measurement accuracy and production capacity.

[0027] In this scheme, a weighing sensor is used to measure the mass of the medium over a period of time to indirectly obtain the flow rate.

[0028] Gmeasurement1 = Gtank + Gvalve + Gwater1

[0029] Gmeasurement2 = Gtank + Gvalve + Gwater2

[0030] L=(Gmeasure2—Gmeasure1) / T

[0031] That is, L = (Gwater2 - Gwater1) / T

[0032] Where: G tank – mass of the liquid collection tank, in g

[0033] G-valve – Mass of the solenoid valve, in grams (g)

[0034] G_water — the mass of water in the tank, measured in grams.

[0035] G-measurement – ​​Measurement value from the weighing sensor, unit: g

[0036] L – Flow rate measured at a single orifice, in g / s

[0037] T – the time difference between two measurements taken by the load cell, measured in seconds.

[0038] Based on the above analysis, the relative error of the single-orifice flow measurement depends solely on the repeatability error of the weighing sensor itself. Therefore, when selecting a weighing sensor, good repeatability is required. A single-point weighing sensor with a comprehensive error of 0.02%FS is selected. According to calculations, assuming a time difference of 1 minute between two data acquisitions and a flow rate range of 120g to 1800g, the preliminary calculation shows that the mass of the collection tank, solenoid valve, and its accessories is approximately 2500g. Therefore, a weighing sensor with a range of 5kg is proposed to be selected in this scheme.

[0039] The backwashing system includes a backwashing valve, a pressure tank, and a valve. The backwashing valve and the valve are both connected to a pressure regulating system. The output end of the backwashing valve is connected to the pressure tank. The output ends of the pressure tank and the valve are both connected to the return water pipeline. In use, the backwashing test specimen is installed in the pressure tank, and pressurized water is output to the pressure tank through the pressure regulating system to test the backwashing test specimen. After backwashing, the silk cloth detection method is used for testing.

[0040] The pressurization system can stably pressurize the water medium output from the water source system. The pressurization system includes a manual ball valve, an overflow valve, and high-pressure water pumps A, B, C, and D. The high-pressure water pumps A, B, C, and D are connected in parallel. There are four manual ball valves and four overflow valves, and the four manual ball valves are respectively located in the input direction of high-pressure water pumps A, B, C, and D. By setting manual ball valves at the front end of each high-pressure water pump, the equipment can be manually controlled in an emergency. Four gain valves are respectively located in the output direction of high-pressure water pumps A, B, C, and D. The gain valves set in the output direction of each high-pressure water pump ensure the safety of the experimental platform, play the role of overpressure overflow, and protect the components. The output ends of high-pressure water pumps A, B, C, and D are connected to the pressure regulating system.

[0041] To prevent the backflow of the medium water from causing the water pump to reverse, one-way valves are installed at the output ends of high-pressure water pumps A, B, C, and D.

[0042] In order to stabilize the pipeline of the booster system, an accumulator is installed in the output direction of high-pressure water pumps A, B, C and D, and the volume of the accumulator is 100L.

[0043] By pumping the medium water to the pressure regulating system through high-pressure water pumps A, B, C, and D, filters are installed at both the output and input ends of high-pressure water pumps A, B, C, and D to ensure the cleanliness of the water. The filters are triple filters with filtration accuracies of 10μ, 10μ, and 4μ.

[0044] The high-pressure water pumps A and B are plunger pumps with a flow rate of 40-60 L / min; during the product debugging process, this application uses a water pump of model XLT5415T with a flow rate of 54 L / min (0.9 kg / s);

[0045] The high-pressure water pumps C and D are plunger pumps with a flow rate of 150-170 L / min; during the product debugging process, this application uses a water pump with model RTD160.130 and a flow rate of 160 L / min (2.67 kg / s).

[0046] High-pressure water pump parameter table:

[0047] Serial Number model parameter power quality High-pressure water pump A XLT5415T 13MPa, flow rate 54L / min; 0.9kg / s; 7.5KW 17.2kg High-pressure water pump B XLT5415T 13MPa, flow rate 54L / min; 0.9kg / s; 7.5KW 17.2kg High-pressure water pump C RTD160.130 15MPa, flow rate 160L / min; 2.67kg / s; 15KW 58kg High-pressure water pump D RTD160.130 15MPa, flow rate 160L / min; 2.67kg / s; 15KW 58kg

[0048] The pressure regulating system can ensure the stability of the pressure of the medium water in the inlet of the test specimen. Due to the limitations of the range ratio of the mass flow meter and the accuracy of the pressure instrument, the flow rate of the medium water in the test specimen during the measurement process ranges from 0.03 kg / s to 5.267 kg / s, and the pressure ranges from 0.1 MPa to 3.0 MPa.

[0049] The pressure regulating system includes a first pressure regulating pipeline, a second pressure regulating pipeline, and a third pressure regulating pipeline. The first pressure regulating pipeline, the second pressure regulating pipeline, and the third pressure regulating pipeline are connected in parallel. The second pressure regulating pipeline and the third pressure regulating pipeline have the same structure as the first pressure regulating pipeline. The first pressure regulating pipeline includes a pressure regulating valve and a mass flow meter. The pressure regulating valve and the mass flow meter are connected in series. The mass flow meter is installed in the first pressure regulating pipeline. The pressure of the input medium water is regulated by the pressure regulating valve, and the flow of the medium water is measured by the mass flow meter.

[0050] The pressure range of the first pressure regulating pipeline is 0.1MPa to 1MPa, and the flow rate range is 0.03kg / s to 0.3kg / s.

[0051] The pressure range of the second pressure regulating pipeline is 0.1MPa to 1MPa, and the flow rate range is 0.2kg / s to 3.2kg / s.

[0052] The pressure range of the third pressure regulating pipeline is 1MPa to 3.0MPa, and the flow range is 1kg / s to 5.3kg / s.

[0053] When conducting a 0.7MPa single-rod test during the experiment, it is sufficient to connect the first pressure regulating pipeline to the test piece to meet the experimental requirements.

[0054] During the full-loop experiment, the required pressure regulating branch is selected based on the experimental flow rate and pressure parameters.

[0055] Each of the first, second, and third pressure regulating pipelines is equipped with a manual ball valve at its input end. These manual ball valves allow for manual control of the on / off status of the first, second, and third pressure regulating pipelines in emergency situations, thereby improving the safety of the equipment setup.

[0056] To prevent the backflow of medium water in the first, second, and third pressure regulating lines into the mass flow meter and thus damage it, a one-way valve is installed at the output end of the mass flow meter to restrict the flow direction of the medium water, thereby improving the service life of the equipment and the accuracy of the data.

[0057] In order to stabilize the output medium water, an accumulator is installed at the end of the first, second and third pressure regulating pipelines;

[0058] Air vents are installed before and after the first, second, and third pressure regulating pipelines to ensure that the medium water flows fully through the mass flow meter, thereby improving the accuracy of the equipment in measuring the medium water.

[0059] In order to monitor the water pressure in the first, second, and third pressure regulating pipelines in real time, pressure sensors are installed in the first, second, and third pressure regulating pipelines respectively.

[0060] The pressure regulating valves in the first, second, and third pressure regulating lines are TESCOM products from the USA, equipped with valve positioners with an accuracy of 0.5%.

[0061] The valve used in the first pressure regulating pipeline is model 44-1363+ER5000SI-1-QL;

[0062] The valve used in the second pressure regulating pipeline is model 54-2821+ER5000SI-1-QL;

[0063] The valve model used in the third pressure regulating pipeline is 54-2769+ER5000SI-1-QL;

[0064] Pressure regulating valve parameter table:

[0065] Pipeline serial number Valve Model Positioner Model Flow range First pressure regulating pipeline 44-1363 ER5000SI-1-QL 0 kg / s~0.5 kg / s Second pressure regulating pipeline 54-2821 ER5000SI-1-QL 0.2kg / s~3.2kg / s Third pressure regulating pipeline 54-2821 ER5000SI-1-QL 1kg / s~6kg / s

[0066] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0067] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0068] In the description of this invention, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0069] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An experimental system for a water flow test bench, characterized in that, It includes a water source system, a pressurization system, a pressure regulating system, an experimental area, a backwashing system, and a weighing system. The output end of the water source system is connected to the pressurization system, the output end of the pressurization system is connected to the pressure regulating system, the pressure regulating system is connected to the experimental area, the weighing system is located at the lower end of the experimental area, the backwashing system is connected to the pressurization system, the water source system is equipped with a return water pipeline, and the pressurization system, pressure regulating system, backwashing system, and weighing system are respectively connected to the return water pipeline. The booster system includes a manual ball valve, an overflow valve, high-pressure water pumps A, B, C, and D. These high-pressure water pumps are connected in parallel. Four manual ball valves and four overflow valves are provided, with the four manual ball valves positioned in the input direction of each of the high-pressure water pumps A, B, C, and D. Four gain valves are positioned in the output direction of each of the high-pressure water pumps A, B, C, and D. The outputs of the high-pressure water pumps A, B, C, and D are connected to the pressure regulating system. Accumulators are installed in the output direction of high-pressure water pumps A, B, C, and D. Filters are installed at both the output and input ends of high-pressure water pumps A, B, C, and D.

2. The experimental system of the water flow test bench according to claim 1, characterized in that, The water source system also includes a return water tank, a return water pump, and a water storage tank. The return water pipeline is connected to the return water tank, and the return water pump is connected between the return water tank and the water storage tank.

3. The experimental system of the water flow test bench according to claim 2, characterized in that, The water source system also includes a liquid level sensor, which is installed in the water storage tank.

4. The experimental system of the water flow test bench according to claim 2, characterized in that, The water source system also includes a filter, which is installed at the input end of the return water pump, and the filter has a filtration accuracy of 10μm.

5. The experimental system of a water flow test bench according to claim 2, characterized in that, The volume of the water storage tank is taken as 3m³. 3 .

6. The experimental system of a water flow test bench according to claim 2, characterized in that, The water source system also includes a cooler and a cooling water pump. The cooler is connected to the water storage tank, and the cooling water pump is connected to the water storage tank and the cooler.

7. The experimental system of a water flow test bench according to claim 6, characterized in that, The cooler is an air-cooled surface cooler.

8. The experimental system of a water flow test bench according to claim 1, characterized in that, The backwashing system includes a backwashing valve, a pressure tank, and a valve. The backwashing valve and the valve are both connected to a pressure regulating system. The output end of the backwashing valve is connected to the pressure tank, and the output ends of the pressure tank and the valve are both connected to the return water pipeline.

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