CN212744294U

CN212744294U - High-speed high-pressure pump test bench

Info

Publication number: CN212744294U
Application number: CN202021692819.6U
Authority: CN
Inventors: 郑亚青; 孙璐璐; 刘超; 郑通; 王程永; 王小佚
Original assignee: Beijing Startech Co ltd
Current assignee: Beijing Startech Co ltd
Priority date: 2020-08-14
Filing date: 2020-08-14
Publication date: 2021-03-19
Anticipated expiration: 2030-08-14

Abstract

The utility model discloses a high-speed high-pressure pump test bench relates to pump test technical field, including test platform, reverse osmosis water making device, air pressure boost distributing device, vacuum pump unit, high-pressure water tank, inverter motor, acceleration rate case, torque sensor, the pump under test, cooling lubrication system, variable frequency power system and measurement and control system, inverter motor, acceleration rate case, torque sensor and the pump under test are installed on test platform, have perfected high-speed high-pressure pump test system, have optimized structural design, have increased high-pressure water tank pressure boost and evacuation function, can test the high pressure limit and the high rotational speed operating mode performance of pump, the characteristics that specific measurement stability is high; the test bed can filter water quality, reduce the hardness of the water quality, improve the measurement precision, reduce the scaling of a pump impeller and other over-current elements, effectively make up the defects of the prior art and meet the requirements of actual conditions.

Description

High-speed high-pressure pump test bench

Technical Field

The utility model relates to a pump test technique especially relates to a high-speed high-pressure pump test bench.

Background

Pumps, especially pumps of several types such as centrifugal pumps, mixed flow pumps and axial flow pumps, must be tested in development and production processes by taking water as a medium, and the purpose of the test is as follows: 1. determining the relationship among the pump lift, power and efficiency and the flow through a performance test, namely determining a pump lift and flow curve, a power and flow curve and an efficiency and flow curve; 2. under a certain rotating speed and flow, the cavitation erosion characteristic of the pump is measured through a cavitation erosion test, a net positive suction pressure head and a head curve are obtained, and a critical cavitation erosion point is obtained, so that the performance test and the cavitation erosion test with water as a medium are necessary test means for the design, production and manufacturing links of the water pump. The pump hydraulic test bed in the prior art generally meets the following requirements: 1. the test system can meet the requirements of power, flow, pressure and rotating speed of a hydraulic test; 2. the precision of the measuring equipment meets the requirement of design indexes; 3. the test system must have long-term stability; 4. the fluid path system should be sealed. For example, CN201721741385.2 pump test stand, CN201720846047.9 water pump test stand, etc. also disclose patents related to pump test stand, these prior art test stands mostly aim at low-speed low-pressure pump tests, for high-speed high-pressure pump tests with rotation speed over 10000rpm and pump lift over 100 m, these patent test stands lack applicability, meanwhile, for cavitation tests which the high-speed pump must perform, the published related patents not only lack this function, but also do not require water quality of the pump test, because water quality of the liquid flow test has great influence on stability and measurement accuracy of the test system, if water hardness is too high, calcium and magnesium ions are high, scale can be generated on flow passing elements such as flow meters and valves in the pump impeller and pipeline system, and measurement accuracy is affected.

Disclosure of Invention

The utility model aims at overcoming the not enough of prior art, provide a high-speed high-pressure pump test bench.

The utility model discloses a high-speed high-pressure pump test bench, including test platform, reverse osmosis water preparation device, air pressure boost distributing device, vacuum pump unit, high-pressure water tank, inverter motor, acceleration rate case, torque sensor, by the pump, cooling lubrication system, variable frequency power system and measurement and control system, inverter motor, acceleration rate case, torque sensor and by the pump installation on test platform, reverse osmosis water preparation device's the delivery end through the pipeline with arrange subaerial high-pressure water tank intercommunication, high-pressure water tank below is equipped with the outlet, is equipped with drain valve I on the outlet, the delivery end of high-pressure water tank is connected with the water absorption end of being tried the pump through the pipeline, the delivery end of being tried the pump is connected with high-pressure water tank through the pipeline; the output end of the variable frequency motor is connected with a tested pump through a coupler series speed increasing box and a torque sensor, and the other end of the variable frequency motor is connected with a variable frequency power system; the air pressurization and distribution device and the vacuum pump unit are connected with the high-pressure water tank through a pipeline.

As a further improvement, the utility model is provided with an inner diversion corrugated pipe compensator, a pressure sensor, a temperature sensor, a flowmeter I, a high-position exhaust valve, a drain valve II and a pneumatic ball valve on the water inlet end pipeline of the tested pump.

As a further improvement, the utility model is provided with an inner diversion corrugated pipe compensator, a pressure sensor, a temperature sensor, a flowmeter II and a regulating valve on the outlet end pipeline of the tested pump, and a vibration sensor is arranged on the shell of the tested pump.

As a further improvement, the utility model is provided with a safety valve, a pressure sensor and a temperature sensor on the high-pressure water tank, and a pneumatic valve on the pipeline connected with the air-pressurizing distribution device and the vacuum pump unit, and a manual valve on the pipeline connected with the reverse osmosis water making device.

As a further improvement, the upper end of the speed increasing box is provided with a pipeline which is connected with a cooling and lubricating system, and the cooling and lubricating system provides cooling and lubricating oil for the gear and the bearing of the speed increasing box.

As a further improvement, the pipeline of the air supercharging and distributing device is provided with a pressure sensor, a pneumatic valve and a manual valve.

As the utility model discloses a further improvement, the system of observing and controling comprises sensor and computer collector and observing and controlling software, flowmeter I, flowmeter II, pneumatic valve, pressure sensor, temperature sensor, vibration sensor, torque sensor, by the test pump water outlet end governing valve and the frequency conversion driving system on the pipeline all with the computer data connection who observes and controls the system.

The utility model discloses a high-speed high-pressure pump test bench has perfected high-speed high-pressure pump test system, has optimized structural design, has increased high-pressure water tank pressure boost and evacuation function, can test the high pressure limit and the high rotational speed operating mode performance of pump, and the concrete measurement stability is high characteristics; the test bed can filter water quality, reduce the hardness of the water quality, improve the measurement precision, reduce the scaling of a pump impeller and other over-current elements, effectively make up the defects of the prior art and meet the requirements of actual conditions.

Drawings

Fig. 1 is a flow chart of a high-speed high-pressure pump test system of the present invention.

Detailed Description

The utility model discloses a high-speed high-pressure pump test bench, including test platform 20, reverse osmosis system water installation 1, air pressure boost gas distribution device 2, vacuum pump unit 3, high pressure water tank 5, inverter motor 11, acceleration rate case 12, torque sensor 13, by the pump 14, cooling lubrication system 10, variable frequency driving system 18 and measurement and control system 19, inverter motor 11, acceleration rate case 12, torque sensor 13 and by the pump 14 installation on test platform 20, reverse osmosis system water installation 1's outlet end is through pipeline and the high pressure water tank 5 intercommunication of arranging in the subsurface, and be equipped with manual valve on the pipeline of connection, high pressure water tank 5 below is equipped with the outlet, is equipped with drain valve I21 on the outlet, and wherein reverse osmosis system water installation 1 preparation comprises RO reverse osmosis module, and the index of deionized water is that the conductivity value is less than 10s/cm, can get rid of calcium magnesium ion and prevent the inside formation dirt matter of device, when the water quality conductivity is higher than the value, the water in the water tank needs to be purified and filtered again, the high-pressure water tank 5 is arranged below the ground to facilitate water drainage and avoid the influence of pressure difference caused by a high-level water liquid level on a test, the water outlet end of the high-pressure water tank 5 is connected with the water inlet end of the tested pump 14 through a pipeline, an inner flow guide corrugated pipe compensator, a pressure sensor, a temperature sensor, a flow meter I16, a high-level exhaust valve 15, a water drainage valve II 17 and a pneumatic ball valve 6 are arranged on the pipeline of the water inlet end of the tested pump 14, the water outlet end of the tested pump 14 is connected with the high-pressure water tank 5 through a pipeline, the pipeline of the water outlet end of the tested pump 14 is provided with the inner flow guide corrugated pipe compensator, the pressure sensor, the temperature sensor, the flow meter II 8 and a regulating valve 7; the output end of the variable frequency motor 11 is connected with a tested pump 14 through a coupler series speed increasing box 12 and a torque sensor 13, the other end of the variable frequency motor is connected with a variable frequency power system 18, the tested pump 14 drives the variable frequency motor 11 and the speed increasing box 12 through the variable frequency power system 18, the torque sensor 13 measures the torque and the rotating speed of the tested pump 14 during operation, the upper end of the speed increasing box 12 is provided with a pipeline connected with a cooling and lubricating system 10, and the cooling and lubricating system 10 provides cooling and lubricating oil for a gear and a bearing of the speed increasing box 12; the air pressurization and air distribution device 2 is connected with a high-pressure water tank 5 through a pipeline, provides pre-pump pressure for the high-pressure water tank 5, simulates the actual operation condition of a tested pump 14, a pressure sensor, a pneumatic valve and a manual valve are arranged on the pipeline of the air pressurization and air distribution device 2, a safety valve 4 is arranged on the high-pressure water tank 5 to prevent the water tank from being in overpressure, the air pressurization and air distribution device 2 pressurizes the high-pressure water tank 5, squeeze water enters the tested pump 14 and the inlet and outlet pipelines of the tested pump 14, redundant gas in the pipelines is discharged through a high-position exhaust valve 15, a variable frequency motor 11 is started to drag the tested pump 14 to operate, meanwhile, a regulating valve 7 regulates the rear pressure and the flow of the tested pump 14, simulates the actual operation condition of the tested pump 14, the flow of the tested pump is measured through a flow meter II 8 at the outlet of the tested pump 14, and the flow characteristic of the tested pump 14, wherein the inlet flowmeter I16 of the tested pump 14 is used for carrying out flow comparison with the outlet flowmeter II 8 of the tested pump.

The vacuum pump unit 3 is connected with the high-pressure water tank 5 through a pipeline, the vacuum pump unit 3 provides negative pressure for the high-pressure water tank 5 to simulate the cavitation working condition state of the tested pump 14, the air pressurization and air distribution device 2 stops pressurization and exhausts the high-pressure water tank 5 in the operation process of the tested pump 14, the vacuum pump unit 3 is started to pump negative pressure to the high-pressure water tank 5, the water pressure at the inlet of the tested pump 14 is reduced to manufacture the cavitation state of the tested pump 14, the characteristic of the tested pump 14 in the cavitation state is calculated through the measured flow and pressure of the inlet and the outlet of the tested pump 14, the cooling and lubricating system 10 always provides lubricating oil for the speed increasing box 12 of the transmission system in the operation process of the tested pump 14, the measurement and control system 18 is composed of a sensor and computer acquisition and measurement and control software, and the flow meter I16, the flow meter II 8, the pneumatic valve, the pressure sensor, The vibration sensor, the torque sensor, the regulating valve 7 on the outlet end pipeline of the tested pump 14 and the variable frequency power system 18 are all in data connection with a computer of the measurement and control system 19, so that the measurement and control system 19 can measure pressure, temperature, flow, torque, vibration and other measurement points in a test from time to time, and control the regulating valve 7 on the outlet end pipeline of the tested pump 14 and the variable frequency power system 18.

Claims

1. A high-speed high-pressure pump test bed comprises a test platform (20), a reverse osmosis water production device (1), an air pressurization and air distribution device (2), a vacuum pump unit (3), a high-pressure water tank (5), a variable frequency motor (11), a speed increasing box (12), a torque sensor (13), a tested pump (14), a cooling and lubricating system (10), a variable frequency power system (18) and a measurement and control system (19), wherein the variable frequency motor (11), the speed increasing box (12), the torque sensor (13) and the tested pump (14) are arranged on the test platform (20), the high-speed high-pressure pump test bed is characterized in that the water outlet end of the reverse osmosis water production device (1) is communicated with the high-pressure water tank (5) arranged under the ground through a pipeline, a water outlet is arranged below the high-pressure water tank (5), a drain valve I (21) is arranged on the water outlet, and the water outlet end of the high-pressure water tank (5, the water outlet end of the tested pump (14) is connected with the high-pressure water tank (5) through a pipeline; the output end of the variable frequency motor (11) is connected with a tested pump (14) through a coupler series speed increasing box (12) and a torque sensor (13), and the other end of the variable frequency motor is connected with a variable frequency power system (18); the air pressurization and distribution device (2) and the vacuum pump unit (3) are connected with the high-pressure water tank (5) through pipelines.

2. A high-speed high-pressure pump test bench as claimed in claim 1, characterized in that the water inlet pipeline of the tested pump (14) is provided with an internal flow guiding corrugated pipe compensator, a pressure sensor, a temperature sensor, a flow meter i (16), a high-level exhaust valve (15), a drain valve ii (17) and a pneumatic ball valve (6).

3. A high-speed high-pressure pump test bench as claimed in claim 2, characterized in that the water outlet pipeline of the tested pump (14) is provided with an internal flow guiding bellows compensator, a pressure sensor, a temperature sensor, a flow meter ii (8) and a regulating valve (7), and the casing of the tested pump (14) is provided with a vibration sensor.

4. A high-speed high-pressure pump test bench as claimed in claim 3, characterized in that the high-pressure water tank (5) is provided with a safety valve (4), a pressure sensor and a temperature sensor, pneumatic valves are arranged on the pipelines connected with the air-pressurizing air-distributing device (2) and the vacuum pump unit (3), and manual valves are arranged on the pipelines connected with the reverse osmosis water-making device (1).

5. A high-speed high-pressure pump test bench as claimed in claim 1, characterized in that the upper end of the speed-increasing box (12) is provided with a pipeline connected with the cooling and lubricating system (10), and the cooling and lubricating system (10) provides cooling and lubricating oil for the gears and bearings of the speed-increasing box (12).

6. A high-speed high-pressure pump test bench as claimed in claim 1, characterized in that the pipeline of the air-pressurizing air-distributing device (2) is provided with a pressure sensor, a pneumatic valve and a manual valve.

7. A high-speed high-pressure pump test bench as claimed in claim 4, characterized in that the measurement and control system (19) is composed of a sensor, a computer collector and measurement and control software, and the flowmeter I (16), the flowmeter II (8), the pneumatic valve, the pressure sensor, the temperature sensor, the vibration sensor, the torque sensor, the regulating valve (7) on the water outlet end pipeline of the tested pump (14) and the variable frequency power system (18) are all in data connection with the computer of the measurement and control system (19).