CN217761154U - Test device for pre-pressing turbine pump and thrust chamber part - Google Patents

Abstract

The test device for the pre-pressing turbine pump and the thrust chamber part comprises a water tank, a pre-pressing turbine pump inlet pipeline, a pre-pressing turbine pump outlet pipeline, a high-pressure water source pipeline and a liquid flow test water return pipeline; the water tank is provided with at least two outlets and at least two inlets; a first outlet of the water tank is connected with an inlet of the pre-pressing turbine pump through an inlet pipeline of the pre-pressing turbine pump, and an outlet of the pre-pressing turbine pump is connected with a first inlet of the water tank through an outlet pipeline of the pre-pressing turbine pump; and a second outlet of the water tank is connected with a turbine inlet of the pre-pressing turbine pump and an inlet of a liquid flow test section of the thrust chamber part through a high-pressure water source pipeline, and an outlet of the liquid flow test section is connected with the second inlet of the water tank through a liquid flow test water return pipeline. The invention solves the problems of complex process flow, various equipment and single system function of the existing test system; and further solve the problems of low integration level, low automation degree and inconvenient operation and monitoring of the existing test system.

Description

Test device for pre-pressing turbine pump and thrust chamber part

Technical Field

The invention belongs to the technical field of test equipment and test methods in equipment manufacturing, and mainly relates to a test method for a pre-pressing turbine pump and a thrust chamber part in rocket engine research and development.

Background

After the design and manufacture of the pre-pressing turbine pump and the rocket thrust chamber component are finished, relevant tests are required to be carried out before shaping and hot testing so as to verify the hydraulic performance, the cavitation allowance, the flow characteristic, the flow resistance characteristic and the like of the pre-pressing turbine pump and the rocket thrust chamber component. The hydraulic performance test and the liquid flow test are used as important links in rocket engine development, test data can be provided for rocket engine development, and basis is provided for rocket engine overall performance evaluation and adjustment. The hydraulic performance test and the liquid flow test of related products mainly use water as a medium, and complete performance test and obtain test data on corresponding test beds.

At present, hydraulic performance tests and liquid flow tests are completed on different test beds, and the compatibility of a test system to different types of pre-pressing turbine pumps and liquid flow components is poor, so that only limited specific types of products and components can be tested. Before and after each test, the test products are troublesome to mount, dismount and replace; the pressure and flow range which can be provided by the test bed is relatively fixed; the regulation mode of pressure and flow is comparatively loaded down with trivial details, lacks the automatic control function, and security and operability are poor.

In addition, in order to meet the pressure and flow required by relevant tests, the existing test system generally adopts a mode of adding high-pressure storage equipment to an air compressor or connecting multiple devices in parallel, and the process flow design is complex. The whole test system has more used devices, larger occupied area, high construction and operation and maintenance cost, and low integration level and automation degree of the test system in the aspects of overall design, measurement and control. Meanwhile, the test system is not convenient enough in the aspects of operation monitoring and test data acquisition.

Patent CN113790110A discloses a liquid flow test system for integrated rocket engine, including basic supply module, middle and low pressure supply module, high pressure supply module, gas supply module, flow measurement module, pressure measurement module, water collection and return module, pump hydraulic test station, high pressure liquid flow test station, middle and low pressure liquid flow test station and control system, each module is integrated design respectively, adopt the form of modularization, make liquid flow test of liquid rocket engine of different thrust grades can be accomplished depending on a system, pump hydraulic test station, high pressure liquid flow test station and middle and low pressure liquid flow test station can carry out test simultaneously, also can independently carry out test experiment respectively, it has enlarged the spare part scope that can test, system integration is improved, operation and maintenance cost has also been reduced to a certain extent, measurement accuracy has been guaranteed. However, the applicant believes that it also has the following disadvantages:

(1) The system composition is complex. In order to complete the similar tests, more devices are used; the process flow is complex; the construction cost is high. And in the aspect of pressure regulation, a mode of separating high pressure from medium and low pressure is adopted, so that the complexity of the system is increased.

(2) The test stations are limited. Only can complete the test of the equipment with limited specification models.

(3) It does not have the function of carrying out the cavitation test.

Patent CN112729848A discloses a comprehensive liquid flow test system of a liquid rocket engine, which comprises a combustion agent section of an engine thrust chamber, an oxidant section, an injector, a thrust chamber complete machine, a gas generator, an orifice plate, a cavitation pipe, an engine valve, a nozzle and the like, can meet liquid flow test requirements under different pressure and different flow working conditions, has liquid flow test capability with steady-state characteristics and dynamic characteristics, particularly the processes of jet flow and spray, valve response, propellant filling and the like, and improves test efficiency and equipment utilization rate. However, the applicant believes that it also has the following disadvantages:

in the aspect of pressure regulation, a mode of combining a high-pressure storage tank module and an air distribution pressure reduction module is adopted. More air distribution pressure reducing devices are used, and the pressure adjusting process is complex to operate. The liquid flow tests of different parts are completed by arranging a plurality of stations, so that the system equipment and the construction cost are increased; meanwhile, the hydraulic performance test and the liquid flow test are not performed.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention aims to provide a test device for pre-pressurizing a turbopump and a thrust chamber part in the research and development process of a rocket engine, so as to solve the problems of complex process flow, various equipment types and single system function of the conventional test system; and further solve the problems of low integration level, low automation degree and inconvenient operation and monitoring of the existing test system. In addition, in the aspect of main equipment type selection, the on-site actual condition is combined, reasonable optimization is carried out, the space utilization rate of the device is improved, and the construction, operation and maintenance cost is reduced. In the aspect of measurement and control, mature and reliable software and hardware of the upper computer and the lower computer are used, and the advancement, the reliability and the expansibility are improved.

In order to achieve the purpose, the invention adopts the technical scheme that:

the test device for the pre-pressing turbine pump and the thrust chamber part comprises a water tank, a pre-pressing turbine pump inlet pipeline, a pre-pressing turbine pump outlet pipeline, a high-pressure water source pipeline and a liquid flow test water return pipeline;

the water tank is provided with at least two outlets and at least two inlets;

a first outlet of the water tank is connected with an inlet of a pre-pressing turbine pump through an inlet pipeline of the pre-pressing turbine pump, and an outlet of the pre-pressing turbine pump is connected with a first inlet of the water tank through an outlet pipeline of the pre-pressing turbine pump;

and a second outlet of the water tank is connected with a turbine inlet of the pre-pressing turbine pump and an inlet of a liquid flow test section of the thrust chamber part through the high-pressure water source pipeline, and an outlet of the liquid flow test section is connected with the second inlet of the water tank through the liquid flow test water return pipeline.

In one embodiment, a second electric switch valve, a pipeline pump and a first electric regulating valve are arranged on the inlet pipeline of the pre-pressing turbine pump;

a second electric regulating valve is arranged on an outlet pipeline of the pre-pressing turbine pump;

a plunger pump and a fourth electric regulating valve are arranged on the high-pressure water source pipeline;

and a fifth electric regulating valve is arranged on the liquid flow test water return pipeline.

In one embodiment, the water tank is also provided with a water replenishing port which is connected with a water replenishing pipe and is provided with a first electric switch valve, and the volume of the water tank ensures that the highest circulating water consumption is ensured and a water use allowance is reserved when the device operates at the maximum flow; and the first electric switch valve is interlocked with a water tank liquid level signal, so that the automatic control of the water tank liquid level is realized.

In one embodiment, a first flowmeter and a first pressure gauge are further arranged on the inlet pipeline of the pre-pressing turbine pump; a second flowmeter and a second pressure gauge are also arranged on the outlet pipeline of the pre-pressing turbine pump; and a third flowmeter and a third pressure gauge are also arranged on the high-pressure water source pipeline.

In one embodiment, a third electric regulating valve is arranged in parallel with the second electric regulating valve, the second electric regulating valve is a main pipeline regulating valve, and the third electric regulating valve is an auxiliary pipeline regulating valve; and the starting and stopping instruction of the pipeline pump is interlocked with the switching signals of the second electric switch valve, the first electric regulating valve, the second electric regulating valve and the third electric regulating valve.

In one embodiment, the pipeline pump is controlled in a variable frequency mode, the frequency of the pipeline pump is interlocked with the inlet pressure of the pre-pressing turbine pump, and the frequency of the pipeline pump is determined according to the inlet pressure of the pre-pressing turbine pump when a hydraulic performance test of the pre-pressing turbine pump is carried out, so that cavitation of the pre-pressing turbine pump caused by insufficient water supply and reduced inlet pressure is avoided; when a liquid flow test of the pre-pressing turbine pump is carried out, the required water supply amount is provided for the turbine inlet of the pre-pressing turbine pump; when the cavitation test of the pre-pressing turbine pump is carried out, the turbine inlet pressure of the pre-pressing turbine pump is accurately adjusted according to the frequency of the pipeline pump, so that the pressure ratio required by the cavitation test is achieved.

In one embodiment, the plunger pump consists of a first plunger pump and a second plunger pump which are connected in parallel, the inlets of the first plunger pump and the second plunger pump are respectively provided with an auxiliary pipeline pump, and the outlets of the first plunger pump and the second plunger pump are respectively provided with an energy accumulator; the inlet and the outlet of the first plunger pump are respectively provided with a third electric switch valve and a fifth electric switch valve, and the inlet and the outlet of the second plunger pump are respectively provided with a fourth electric switch valve and a sixth electric switch valve; the start-stop instruction of the first plunger pump is interlocked with the third electric switch valve, the fifth electric switch valve and the fourth electric regulating valve; and the start-stop instruction of the second plunger pump is interlocked with the fourth electric switch valve, the sixth electric switch valve and the fourth electric regulating valve.

In one embodiment, the first plunger pump and the second plunger pump are controlled in a variable frequency mode, and a high-pressure water source with adjustable pressure and flow is provided; the start and stop instructions of the first plunger pump and the second plunger pump are interlocked with the pressure signal of the high-pressure water source pipeline.

In one embodiment, the first plunger pump and the second plunger pump are of a skid-mounted structure, equipment on a skid-mounted frame is symmetrically arranged, and the first plunger pump and the second plunger pump are arranged in parallel with the water tank.

In one embodiment, each interface of the pre-pressurizing turbine pump, the outlet of the liquid flow test section and the outlet of the plunger pump are made of metal wound rubber pipes.

Compared with the prior art, the invention has the beneficial effects that:

(1) The integration level and the automation degree are high, the construction, operation and maintenance cost is low, the occupied space is small, and the applicability is wide.

(2) The test equipment is convenient and quick to mount and dismount, the test manpower is reduced, and the test efficiency is improved.

(3) The test station interface is easy to reform, and can adapt to the test of multi-model, many specifications equipment.

(4) The pressure and flow regulation of the test device is simple and reliable, the regulation precision is high, and the range is wide.

(5) The human-computer interface is friendly, the operation is simple, and the requirements on test operators are reduced.

(6) The test data is convenient and quick to acquire and store, and paperless recording can be completely realized.

(7) And a programmable controller is adopted in the control aspect, so that the control logic can be conveniently adjusted according to test requirements, and different test requirements are met.

Drawings

FIG. 1 is a schematic structural diagram of a testing apparatus according to the present invention.

Fig. 2 shows a test circuit (first circuit) related to the precompression turbine pump.

Fig. 3 is a high pressure water source circuit (second circuit).

Fig. 4 shows a thrust chamber member liquid flow test circuit (third circuit).

FIG. 5 is a schematic diagram of a variable frequency control strategy of the pipeline pump.

Fig. 6 is a schematic structural view of the first plunger pump.

Detailed Description

The embodiments of the present invention will be described in detail below with reference to the drawings and examples.

The invention relates to a design and a test method of a precompression turbine pump, a hydraulic performance test and a thrust chamber comprehensive liquid flow test device in the research and development process of a rocket engine. The device integrates the hydraulic performance test system and the comprehensive liquid flow test system, can provide a water source with large range of pressure and flow, accurately, smoothly and quickly adjusts the pressure and the flow within the provided maximum pressure and flow range, and simultaneously reduces the construction, operation and maintenance cost. The hydraulic performance test and the comprehensive liquid flow test requirements within the allowable range of the flow pressure parameter can be realized. The testing device can realize various hydraulic performance tests and comprehensive liquid flow tests within the provided maximum pressure and flow range by using the frequency converter to adjust the operating frequency of the plunger pump and the pipeline pump. The test device can build an automatic control and test system by the PLC and the acquisition module, and further develop a set of upper computer control and test data acquisition system software based on Labview, so that the automation level and the test of the test are improved.

As shown in fig. 1, the testing apparatus of the present invention includes a water tank 1301, a pre-compressed turbine pump inlet pipeline, a pre-compressed turbine pump outlet pipeline, a high-pressure water source pipeline, and a liquid flow test return pipeline.

The water tank 1301 is used for storing and providing circulating water meeting the requirement for flow and pressure for the whole test device, and providing lubricating oil cooling water for a plunger pump of a high-pressure water source pipeline. The volume design of the device is mainly used for ensuring that the highest circulating water consumption can be ensured when the device operates at the maximum flow, and a certain water consumption allowance is reserved. The water tank 1301 is provided with at least two outlets and at least two inlets. The first outlet of the pump is connected with the inlet of the pre-pressing turbine pump 201 through an inlet pipeline of the pre-pressing turbine pump, and the first inlet of the pump is connected with the outlet of the pre-pressing turbine pump 201 through an outlet pipeline of the pre-pressing turbine pump. The second outlet of the pre-pressurizing turbine pump 201 is connected with the turbine inlet of the pre-pressurizing turbine pump 201 and the inlet of the liquid flow test section 1601 of the thrust chamber component through a high-pressure water source pipeline, and the second inlet of the pre-pressurizing turbine pump is connected with the outlet of the liquid flow test section 1601 through a liquid flow test water return pipeline. That is, the end of the outlet pipeline of the high-pressure water source pipeline is divided into two paths by using a tee joint, one path can provide high-pressure water for the pre-pressing turbine pump 201 to push the turbine thereof to rotate, and power is provided for the pre-pressing turbine pump 201; one path can be used for carrying out a liquid flow test of the components of the thrust chamber, and the two paths are respectively provided with a first high-pressure hand valve 701 and a second high-pressure hand valve 702 for isolation and can be switched according to the experimental requirements.

Referring to fig. 2, 3 and 4, the test apparatus of the present invention can provide three circulation loops:

a first circuit:

the water tank 1301, a pre-pressure turbine pump inlet pipeline, an inlet of the pre-pressure turbine pump 201, an outlet of the pre-pressure turbine pump 201, a pre-pressure turbine pump outlet pipeline and the water tank 1301 are mainly used for hydraulic performance tests, cavitation tests and liquid flow tests of the pre-pressure turbine pump 201.

A second circuit:

the water tank 1301, a high-pressure water source pipeline, a turbine inlet of the pre-pressure turbine pump 201, an outlet of the pre-pressure turbine pump 201, a pre-pressure turbine pump outlet pipeline and the water tank 1301 mainly provide a high-pressure water source for the device.

A third circuit:

the water tank 1301, a high-pressure water source pipeline, an inlet of the liquid flow test section 1601, an outlet of the liquid flow test section 1601 and the water tank are mainly used for carrying out comprehensive liquid flow tests on the thrust chamber parts.

Illustratively, the water tank 1301 is further provided with a water replenishing port, the water replenishing port is connected with a water replenishing pipe, and the water replenishing pipe is provided with a first electric switch valve 401. Obviously, a liquid level monitoring device such as a liquid level meter 1001 can be arranged in the water tank 1301, and the first electric switch valve 401 is interlocked with the water tank liquid level signal, so as to realize automatic control of the water tank liquid level. The tank level gauge 1001 is used to monitor the tank level and ensure that the tank level is within a safe range. And can set up temperature transmitter 1201 in water tank 1301 to the inside water storage temperature of monitoring water tank prevents that the plunger pump from leading to the working medium temperature rise during the operation of plunger pump pressurization from causing the plunger pump cooling effect not good.

Illustratively, a second electric switch valve 402, a pipeline pump 101 and a first electric regulating valve 601 are arranged on the inlet pipeline of the pre-compression turbine pump, and a first flow meter 801 and a first pressure gauge 901 can be further arranged. During the cavitation test of the pre-pressure turbine pump, the first electric regulating valve 601 is used as a regulating measure for matching with the pipeline pump 101 to perform the cavitation test, and during the cavitation test of the pre-pressure turbine pump, the flow supply at the inlet of the pre-pressure turbine pump 201 is slowly reduced and cavitation is generated by regulating the opening of the valve, so that the test purpose is achieved.

For example, a second electric regulating valve 602 is arranged on the outlet pipeline of the pre-pressurizing turbo pump, and a second flow meter 802 and a second pressure gauge 902 can be further arranged. The first flow meter 801 and the second flow meter 802 are used for monitoring the inlet and outlet flow of the pre-pressurizing turbine pump 201, and providing test data for the pre-pressurizing turbine pump to perform tests under different working conditions. The first pressure gauge 901 and the second pressure gauge 902 are used for monitoring the pressure at the inlet and the outlet of the pre-compressed turbine pump 201, and comparing the descending amplitude of the pressure difference value at the inlet and the outlet to determine whether the pre-compressed turbine pump 201 has cavitation.

Illustratively, a plunger pump and a fourth electric control valve 604 are arranged on the high-pressure water source pipeline, and a third flow meter 803 and a third pressure gauge 903 can be further arranged.

Illustratively, a fifth electric control valve 605 is arranged on the liquid flow test water return pipeline.

Further, a first filter 1401 can be arranged on the inlet pipeline of the pre-pressing turbine pump, and a second filter 1402 can be arranged on the high-pressure water source pipeline. The filter is used for filtering impurities in water flow, and the safety and the accuracy of an experiment are ensured.

Illustratively, the third electric control valve 603 can be arranged in parallel with the second electric control valve 602, the second electric control valve 602 is a main pipeline control valve for flow control under a large flow condition, and the third electric control valve 603 is an auxiliary pipeline control valve for flow control under a small flow condition; the two are combined to adjust the inlet and outlet flow of the pre-pressing turbine pump 201, and used as an auxiliary adjusting measure for a cavitation test, the flow adjusting range and the flow adjusting precision are improved, and different test flow working conditions are provided. The starting and stopping instructions of the pipeline pump 101 are interlocked with the switching signals of the second electric switch valve 402, the first electric regulating valve 601, the second electric regulating valve 602 and the third electric regulating valve 603, so that the pipeline pump 101 is prevented from being damaged due to the fact that the valves are not opened during starting.

Illustratively, the pipeline pump 101 of the present invention employs variable frequency control, the frequency of which is interlocked with the inlet pressure of the pre-compressed turbine pump 201 (i.e. the pressure signal of the first pressure gauge 901), and when performing a hydraulic performance test of the pre-compressed turbine pump 201, the pipeline pump frequency can be automatically determined according to the inlet pressure of the pre-compressed turbine pump 201, as shown in fig. 5. The control of the pipeline pump frequency is realized based on the PID control principle. In the control logic of the control system, a pressure value for preventing cavitation of the pre-pressure turbine pump 201 is set as a pressure set value. In the operation process, the pressure feedback value of the inlet pressure sensor of the pre-pressing turbine pump 201 is acquired in real time. In the PID, a frequency control signal is output to a frequency converter of the pipeline pump 101 through comparison of a pressure set value and a pressure feedback value, so that the inlet pressure of the pre-pressure turbine pump 201 is adjusted to avoid cavitation of the pre-pressure turbine pump 201 due to insufficient water supply and reduced inlet pressure. When the liquid flow test of the pre-pressing turbine pump 201 is carried out, the required water supply amount is provided for the turbine inlet of the pre-pressing turbine pump 201; when the cavitation test of the pre-pressure turbine pump 201 is carried out, the turbine inlet pressure of the pre-pressure turbine pump 201 can be accurately regulated according to the pipeline pump frequency, and the specific control method comprises the following steps: the operating frequency of the pipeline pump is reduced, so that the water supply quantity and pressure at the inlet of the pre-pressing turbine pump are reduced, and the pressure ratio required by a cavitation test is achieved.

Illustratively, the plunger pump of the invention is composed of a first plunger pump 301 and a second plunger pump 302 which are connected in parallel, the inlets of the first plunger pump 301 and the second plunger pump 302 are respectively provided with an auxiliary pipeline pump for providing inlet pressure flow for the corresponding plunger pumps, so as to prevent the plunger pumps from generating cavitation due to the over-low inlet flow; the outlets are respectively provided with an energy accumulator which can buffer the pressure fluctuation of the test device; the inlet and outlet of the first plunger pump 301 are provided with a third electric on-off valve 403 and a fifth electric on-off valve 405, respectively, and the inlet and outlet of the second plunger pump 302 are provided with a fourth electric on-off valve 404 and a sixth electric on-off valve 406, respectively; the start-stop instruction of the first plunger pump 301 is interlocked with the third electric switch valve 403, the fifth electric switch valve 405 and the fourth electric regulating valve 604; the start/stop instruction of the second plunger pump 302 is interlocked with the fourth electric switch valve 404, the sixth electric switch valve 406 and the fourth electric regulating valve 604, so that the plunger pump is prevented from being damaged because the valves are not opened during starting.

Taking the first plunger pump 301 as an example, referring to fig. 6, the peripheral components include a liquid inlet pipeline 3011, an auxiliary pipeline pump 3012, a filter 3013, an accumulator 3014, a cooler 3015, a coupler 3016, and the like. The second plunger pump 302 has the same structure as the first plunger pump 301, and is arranged symmetrically (in the direction of fig. 6, the second plunger pump 302 is arranged symmetrically on the right side of the first plunger pump 301 in the drawing). Before the plunger pump is started, an auxiliary pipeline pump 3012 at the inlet of the plunger pump needs to be started; when the plunger pump is stopped, the plunger pump is stopped first, and then the auxiliary pipeline pump 3012 at the inlet is stopped.

When all the above valves, pumps and filters are used, the three circulation loops of the present invention can be described as follows:

a first loop: the water tank-the second electric switch valve 402-the first filter 1401-the pipeline pump 101-the first electric control valve 601-the first flowmeter 801-the first pressure gauge 901-the inlet of the pre-pressure turbine pump 201-the outlet of the pre-pressure turbine pump 201-the first check valve 501-the second pressure gauge 902-the second flowmeter 802-the second electric control valve 602 and/or the third electric control valve 603-the water tank 1301.

A second circuit: the water tank 1301, the third electric switching valve 403 and/or the fourth electric switching valve 404, the first plunger pump 301 and/or the second plunger pump 302 (including an auxiliary line pump, an accumulator), the fifth electric switching valve 405 and/or the sixth electric switching valve 406, the second check valve 502 and/or the third check valve 503, the second filter 1402, the third pressure gauge 903, the third flow meter 803, the fourth electric regulating valve 604, the second high-pressure hand valve 702, the turbine inlet of the pre-pressure turbine pump 201, the outlet of the pre-pressure turbine pump 201, the first check valve 501, the second pressure gauge 902, the second flow meter 802, the second electric regulating valve 602 and/or the third electric regulating valve 603, the water tank 1301.

A third loop: the water tank 1301, the third electric on-off valve and/or the fourth electric on-off valve 404, the first plunger pump 301 and/or the second plunger pump 302 (including an auxiliary pipeline pump and an accumulator), the fifth electric on-off valve 405 and/or the sixth electric on-off valve 406, the second check valve 502 and/or the third check valve 503, the second filter 1402, the third pressure gauge 903, the third flow meter 803, the fourth electric adjusting valve 604, the first high-pressure hand valve 701, the flow test section 1601, the third high-pressure hand valve 703, the fifth electric adjusting valve 605 and the water tank 1301 are sequentially connected.

Illustratively, the first plunger pump 301 and the second plunger pump 302 adopt variable frequency control, and provide a high-pressure water source with adjustable pressure and flow for a test device; the start and stop commands of the first plunger pump 301 and the second plunger pump 302 are also interlocked with the pressure signal of the high-pressure water source pipeline (i.e. the pressure signal of the third pressure gauge 903), so that overpressure can be prevented.

The variable frequency control strategies of the pipeline pump 201 and the plunger pump enable the flow and pressure regulation to be more convenient, the pressure and flow regulation to be high in precision and fast in response.

Illustratively, the first plunger pump 301 and the second plunger pump 302 adopt a skid-mounted structure, devices (plunger pumps, motors, pipeline pumps, accumulators and filters) on a skid-mounted frame are symmetrically arranged, and the first plunger pump 301 and the second plunger pump 302 are arranged in parallel with a water tank, so that the length of an inlet pipeline of the plunger pumps is shortened, and the occupied area of the device is reduced.

Illustratively, the precompression turbopump 201 of the present invention uses a first metal-wrapped rubber tube 1501 for the inlet, a second metal-wrapped rubber tube 1502 for the outlet, and a third metal-wrapped rubber tube 1503 for the turbine inlet. When carrying out different pre-compaction turbopump experimental installations, dismantlements, can reduce the interface location degree of difficulty, to the different pre-compaction turbopumps of interface specification, directly change the rubber tube can. And the rubber tube reduces the stress concentration generated when the pipelines are connected and buffers the vibration of the device.

The fourth metal-wound rubber pipe 1504 is used at the outlet of the liquid flow test section 1601, so that liquid flow tests can be performed on test parts with different specifications and sizes

The outlet of the first plunger pump 301 is wrapped with a fifth metal around rubber tube 1505 and the outlet of the second plunger pump 302 is wrapped with a sixth metal around rubber tube 1506.

The metal winding rubber tube can bear high pressure and is convenient for the installation and the disassembly of a test product. The two ends of each metal winding rubber pipe can be reserved with a stainless steel straight pipe section with a certain length, so that the stainless steel straight pipe section can be conveniently welded with the stainless steel pipeline of each pipeline or loop. One end of the test device is welded with pipelines and flanges with different specifications and dimensions, so that the test device can be suitable for tests of various types of pre-pressing turbine pumps and liquid flow components, and the applicability of the test device is improved.

For ease of description, the apparatus of the present invention is summarized as follows:

(1) And a pump: pipeline pump 101, pre-compressed turbine pump 201, first plunger pump 301, second plunger pump 302.

(2) And a valve: a first electric on-off valve 401, a second electric on-off valve 402, a third electric on-off valve 403, a fourth electric on-off valve 404, a fifth electric on-off valve 405, a sixth electric on-off valve 406, a first check valve 501, a second check valve 502, a third check valve 503, a first electric control valve 601, a second electric control valve 602, a third electric control valve 603, a fourth electric control valve 604, a fifth electric control valve 605, a first high-pressure hand valve 701, a second high-pressure hand valve 702, and a third high-pressure hand valve 703.

(3) And an instrument: the system comprises a liquid level meter 1001, a temperature transmitter 1201, a first flowmeter 801, a second flowmeter 802, a third flowmeter 803, a first pressure gauge 901, a second pressure gauge 902 and a third pressure gauge 903.

(4) And others: a water tank 1301, a first filter 1401, a second filter 1402.

In order to realize the automatic control operation of the equipment in the test device, the invention also comprises an electrical measurement and control device and an operation monitoring interface. Wherein, electric measurement and control equipment includes:

power cabinet, tubing pump variable frequency control cabinet, first plunger pump variable frequency control cabinet, second plunger pump variable frequency control cabinet, PLC switch board.

In the invention, the electrical measurement and control equipment consists of a 5-surface standard cabinet. A power supply cabinet: the power supply is used for supplying power to equipment, instruments, a control loop, measurement and control equipment and the like of the whole test device; pipeline pump variable frequency control cabinet: the power supply and the control power are provided for the pipeline pump, and the working power supply is provided for the pipeline pump frequency converter; plunger pump variable frequency control cabinet: the power supply is used for providing power electricity for the plunger pump, the plunger pump cooling fan and the plunger pump inlet pipeline pump and providing a working power supply for the plunger pump frequency converter; the PLC control cabinet receives and processes digital quantity/analog quantity input signals of the test device, runs a pre-programmed control logic, outputs digital quantity and analog quantity control signals to the test device actuator and collects test process data.

The operation monitoring interface consists of an industrial personal computer, a display and corresponding upper computer configuration software. In an example, the upper computer adopts a product brand industrial personal computer, a man-machine interface and a data acquisition system compiled based on LabView software, and the lower computer adopts a PLC control system based on Siemens S7-200 Smart, so that the reliability, the advancement and the expandability are improved. The data acquisition system adopts a data acquisition program written by a Ganna module and Labview, and has the characteristics of high acquisition frequency, high response speed, historical data storage, real-time data recording, test data exportable storage and the like.

Based on the present invention, the process of performing the hydraulic performance test of the pre-compressed turbo pump 201 is as follows:

initial conditions: mounting a pre-pressing turbine pump 201 to be tested on a test station; the water tank 1301 fills with the amount of water required for the test; opening all valves except blowdown and air discharge on the first loop and the second loop; the first high pressure hand valve 701 at the inlet of the flow test section 1601 was closed.

The device starts: the pipeline pump 101 is started, one or two plunger pumps are started at a low frequency according to test requirements, and impact on the pipeline and equipment caused by large flow and high pressure of an outlet when the plunger pumps are started at power frequency is prevented. A single plunger pump can provide a maximum flow of 17.7m3/h. Illustratively, when automatic control is introduced, the operation mode of the line pump 101 is switched to "automatic", that is: the operation frequency of the pipeline pump 101 is changed to be controlled by the PID of the PLC control system, and the frequency output of the frequency converter tracks the set value of 901, so that cavitation of the pre-pressing turbine pump 201 is prevented.

And (3) test operation: the frequency of operation of the plunger pump is increased step by step and the reading of the third pressure gauge 903 is observed until the pressure required for the test is reached. The hydraulic performance tests under different flow points and pressure points are completed by adjusting the operation frequency of the plunger pump and the opening degrees of the second electric regulating valve 602 and the third electric regulating valve 603.

The cavitation test of the pre-compressed turbo pump 201 is performed as follows:

initial conditions: mounting a pre-pressing turbine pump 201 to be tested on a test station; the water tank 1301 fills the amount of water needed to meet the test; opening all valves except blowdown and air discharge on the first loop and the second loop; the first high pressure hand valve 701 at the inlet of the flow test section 1601 was closed.

The device starts: starting the pipeline pump 101; according to the test requirement, a plunger pump is started at a lower frequency, so that the impact on a device pipeline and equipment caused by the large flow and high pressure of the outlet of the plunger pump when power frequency is started is prevented.

And (3) test operation: the operating frequency of the plunger pump is gradually increased, and the reading of the third pressure gauge 903 is observed until the pressure required by the test is reached. The flow of the pre-pressure turbine pump reaches the flow required by the cavitation test by adjusting the operation frequency of the plunger pump and the opening degrees of the second electric regulating valve 602 and the third electric regulating valve 603.

Further, the pressure difference Δ P between the inlet and the outlet of the pre-compressed turbine pump 201 in the initial state of the cavitation test can be recorded by programming in the measurement and control system. During the reduction of the opening of the first electrical control valve 601, the decrease of Δ P by a certain magnitude is used as a criterion for cavitation. Protection logic is programmed in the control system, and when the pre-pressure turbine pump 201 generates cavitation, the plunger pump is automatically stopped.

The flow test of the pre-compressed turbo pump 201 is performed as follows:

initial conditions: mounting a pre-pressing turbine pump 201 to be tested on a test station; the water tank 1301 fills with the amount of water required for the test; opening all valves except the blowdown and the air discharge on the first loop; the first high-pressure hand valve 701 at the inlet of the liquid flow test section 1601 is closed, and the second high-pressure hand valve 702 at the turbine inlet of the pre-compression turbine pump 201 is closed.

The device is started: the channel pump 101 is activated.

And (3) test operation: the precompression turbine pump 201 is operated at different flow points by adjusting the operating frequency of the pipeline pump 101 and/or the opening of the first electric control valve 601. And recording data such as inlet and outlet pressure of the pre-compressed turbine pump 201 at different flow points, and completing the liquid flow test of the pre-compressed turbine pump 201.

The procedure for performing the flow test of the thrust cell component is as follows:

initial conditions: mounting a thrust chamber component to be tested on a test station, namely a liquid flow test section 1601; the water tank 1301 fills with the amount of water required for the test; opening all valves except the sewage discharge and the air discharge on the third loop; the second high pressure hand valve 702 at the turbine inlet of the pre-compressed turbo pump 201 is closed.

The device is started: one or both plunger pumps are activated at a lower frequency as required by the test.

And (3) test operation: the plunger pump operating frequency is increased step by step and the reading of the third pressure gauge 903 is observed until the desired inlet pressure for the flow test section is reached. And (3) adjusting the opening degree of a fifth electric control valve 605 at the outlet of the liquid flow test section 1601, and observing the indication of a pressure gauge (or a pressure sensor) at the outlet of the liquid flow test part until the back pressure required by the test is reached. The flow test under different pressure points is completed by adjusting the operating frequency of the plunger pump and changing the inlet pressure of the flow test part, and the flow test is completed by recording relevant data and obtaining the flow characteristic and the flow group characteristic of the test part through calculation.

In order to ensure the safety of the testing personnel, all operations in the testing process are preferably operated remotely in a control room through an upper computer. The operation monitoring interface consists of an industrial personal computer, corresponding upper computer measurement and control software and a video monitor, the computer is communicated with the measurement and control cabinet through the Ethernet, and all equipment operation and test data recording in the test process are realized on the measurement and control software.

The necessary blow-down valve, exhaust valve, maintenance valve, overflow valve, instrument valve, etc. in the test device are not fully embodied or described in codes, and can be set as required during the actual construction of the device.

Claims (10)

1. The test device for the pre-pressing turbine pump and the thrust chamber component is characterized by comprising a water tank (1301), a pre-pressing turbine pump inlet pipeline, a pre-pressing turbine pump outlet pipeline, a high-pressure water source pipeline and a liquid flow test water return pipeline;

the water tank (1301) is provided with at least two outlets and at least two inlets;

a first outlet of the water tank (1301) is connected with an inlet of a pre-pressing turbine pump (201) through a pre-pressing turbine pump inlet pipeline, and an outlet of the pre-pressing turbine pump (201) is connected with a first inlet of the water tank (1301) through a pre-pressing turbine pump outlet pipeline;

and a second outlet of the water tank (1301) is connected with a turbine inlet of the pre-pressurizing turbine pump (201) and an inlet of a liquid flow test section (1601) of a thrust chamber component through the high-pressure water source pipeline, and an outlet of the liquid flow test section (1601) is connected with a second inlet of the water tank (1301) through the liquid flow test water return pipeline.

2. The testing device for the pre-stressed turbo pump and the thrust chamber component according to claim 1, wherein a second electric switch valve (402), a pipeline pump (101) and a first electric regulating valve (601) are arranged on the pre-stressed turbo pump inlet pipeline;

a second electric regulating valve (602) is arranged on an outlet pipeline of the pre-pressing turbine pump;

a plunger pump and a fourth electric regulating valve (604) are arranged on the high-pressure water source pipeline;

and a fifth electric regulating valve (605) is arranged on the liquid flow test water return pipeline.

3. The testing device for the pre-stressed turbo pump and the thrust chamber component is characterized in that the water tank (1301) is further provided with a water replenishing port, the water replenishing port is connected with a water replenishing pipe and provided with a first electric switch valve (401), and the volume of the water tank (1301) ensures the highest circulating water consumption and leaves a water use allowance when the device operates at the maximum flow; and the first electric switch valve (401) is interlocked with a water tank liquid level signal to realize automatic control of the water tank liquid level.

4. The testing device for the pre-stressed turbo pump and the thrust chamber component according to claim 2, wherein a first flow meter (801) and a first pressure gauge (901) are further arranged on the inlet pipeline of the pre-stressed turbo pump; a second flowmeter (802) and a second pressure gauge (902) are also arranged on the outlet pipeline of the pre-pressing turbine pump; and the high-pressure water source pipeline is also provided with a third flowmeter (803) and a third pressure gauge (903).

5. The testing device for pre-stressed turbo pump and thrust chamber components according to claim 2, 3 or 4, wherein a third electric regulating valve (603) is arranged in parallel with the second electric regulating valve (602), the second electric regulating valve (602) is a main pipeline regulating valve, and the third electric regulating valve (603) is an auxiliary pipeline regulating valve; the starting and stopping instructions of the pipeline pump (101) are interlocked with the switching signals of the second electric switch valve (402), the first electric regulating valve (601), the second electric regulating valve (602) and the third electric regulating valve (603).

6. The testing device for the pre-pressing turbine pump and the thrust chamber component is characterized in that the pipeline pump (101) adopts variable frequency control, the frequency of the variable frequency control is interlocked with the inlet pressure of the pre-pressing turbine pump (201), and when the hydraulic performance test of the pre-pressing turbine pump (201) is carried out, the pipeline pump frequency is determined according to the inlet pressure of the pre-pressing turbine pump (201), so that cavitation of the pre-pressing turbine pump (201) caused by insufficient water supply and reduced inlet pressure is avoided; when a liquid flow test of the pre-pressing turbine pump (201) is carried out, a required water supply amount is provided for a turbine inlet of the pre-pressing turbine pump (201); when the cavitation test of the pre-pressure turbine pump (201) is carried out, the turbine inlet pressure of the pre-pressure turbine pump (201) is accurately adjusted according to the pipeline pump frequency, so that the pressure ratio required by the cavitation test is achieved.

7. Testing device of pre-compressed turbo pump and thrust chamber components according to claim 2 or 3 or 4, characterized in that the plunger pump consists of a first plunger pump (301) and a second plunger pump (302) connected in parallel, the inlets of the first plunger pump (301) and the second plunger pump (302) are respectively provided with an auxiliary pipe pump, and the outlets are respectively provided with an accumulator; a third electric switch valve (403) and a fifth electric switch valve (405) are respectively arranged at the inlet and the outlet of the first plunger pump (301), and a fourth electric switch valve (404) and a sixth electric switch valve (406) are respectively arranged at the inlet and the outlet of the second plunger pump (302); the start-stop instruction of the first plunger pump (301) is interlocked with the third electric switch valve (403), the fifth electric switch valve (405) and the fourth electric regulating valve (604); the start and stop instruction of the second plunger pump (302) is interlocked with the fourth electric switch valve (404), the sixth electric switch valve (406) and the fourth electric regulating valve (604).

8. The testing device for pre-stressed turbine pump and thrust chamber components of claim 7, wherein the first plunger pump (301) and the second plunger pump (302) are controlled by frequency conversion, and provide a high-pressure water source with adjustable pressure and flow; the start-stop instructions of the first plunger pump (301) and the second plunger pump (302) are also interlocked with the pressure signal of the high-pressure water source pipeline.

9. The testing device for pre-stressed turbine pump and thrust chamber components according to claim 7, wherein the first plunger pump (301) and the second plunger pump (302) are of a skid-mounted structure, equipment on a skid-mounted frame is symmetrically arranged, and the first plunger pump (301) and the second plunger pump (302) are arranged in parallel with the water tank.

10. The testing device for the pre-stressed turbo pump and the thrust chamber component as claimed in claim 7, wherein each interface of the pre-stressed turbo pump (201), the outlet of the liquid flow testing section (1601) and the outlet of the plunger pump are made of metal-wrapped rubber tubes.

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