Multi-functional power machine test platform and test method thereof

Abstract

A multifunctional power machinery test platform and a test method thereof. The multifunctional power machinery test platform comprises a first suction valve, a second suction valve, a compressor, a motor, a compressor test station, a first exhaust valve, a second exhaust valve, a gas buffer tank, a first flowmeter, a second flowmeter, a first stop valve, a second stop valve, a third stop valve, a regulating valve, a quick closing valve, a regulating valve and quick closing valve test station, an expander test station, an expander test load assembly, an expander inlet pipeline, an expander exhaust pipeline, a bypass pipeline and a control device. The multifunctional power machinery test platform can carry out compressor performance test, expander performance test, regulating characteristic test of the regulating valve and safety characteristic test of the quick closing valve, and realizes one machine with multiple functions.

Description

Technical Field

[0001] The present invention relates to the field of power machinery, and particularly to the test equipment of power machinery. Background Art

[0002] For manufacturers, test and measurement are the most direct way to understand the product performance, which is crucial for the continuous improvement of the equipment structure and the continuous enhancement of the performance. For scientific research institutions, test and measurement are an essential part of verifying and perfecting the theoretical model. Therefore, building a test platform and conducting experimental research are not only an important means of scientific research work but also an important manifestation of the design and production strength, which has important practical significance for promoting the development of the power machinery industry.

[0003] Compressors and expanders are important power machinery equipment in the fields of petrochemical industry, energy power, etc. Control valves and quick closing valves are commonly used auxiliary equipment in compressor units and expander units. Since the working process of the expander is exactly opposite to that of the compressor, it is relatively easy to extend each other between the compressor and the expander. On the other hand, in order to improve their competitiveness, enterprises tend to develop in the direction of product diversification. Therefore, general large compressor manufacturers usually also have expander products. At present, the test benches of domestic large-scale process compressors or expander manufacturers are equipped with dedicated test positions according to the type or series of products, which results in a large number of test positions, a large occupied space, a high investment cost for the test platform, a relatively single function for each position, and poor versatility. When the compressor products and expander products leave the factory, usually, the compressor main engine and the expander main engine are separately subjected to individual factory tests, which increases the test production tasks in the workshop; for the regulation characteristics of the control valves supporting the unit, they are all debugged after installation at the engineering site, which often results in heavy on-site debugging tasks and many debugging problems.

[0004] Therefore, in view of the above situation, it is necessary to carry out research on a test platform with stronger functions and better versatility. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a multi-functional power machinery test platform. By using this test platform, the performance tests of various types of compressors can be carried out, the performance tests of various types of expanders can be carried out, and the regulation characteristics of control valves and the security characteristics of quick closing valves can also be tested, realizing multiple functions in one device.

[0006] Another technical problem to be solved by the present invention is to provide a test method for the multi-functional power machinery test platform.

[0007] The multifunctional power machinery test platform according to an embodiment of the present invention includes a first intake valve, a second intake valve, a compressor, a motor, a compressor test stand, a first exhaust valve, a second exhaust valve, a gas buffer tank, a first flow meter, a second flow meter, a first shut-off valve, a second shut-off valve, a third shut-off valve, a regulating valve, a quick-closing valve, a regulating valve and quick-closing valve test stand, an expander test stand, an expander test load assembly, an expander intake pipe, an expander exhaust pipe, a bypass pipe, and a control device; the first intake valve is connected to the compressor intake port, and the compressor exhaust port... The gas inlet is connected to the first inlet of the gas buffer tank via a first exhaust valve. The motor and the power input terminal of the compressor are detachably connected. The second suction valve is used to connect to the inlet of the compressor under test placed on the compressor test bench. The second exhaust valve is connected to the second inlet of the gas buffer tank and is also used to connect to the exhaust port of the compressor under test placed on the compressor test bench. The exhaust port of the gas buffer tank is connected to the inlet end of the expander's inlet pipeline. The outlet end of the expander's inlet pipeline is used to connect to the inlet of the expander under test placed on the expander test bench. The inlet end of the exhaust pipe is used to connect to the exhaust port of the expander to be tested, which is placed on the expander test bench. A first flow meter and a quick-closing valve are installed on the expander inlet pipe, with the first flow meter located upstream of the quick-closing valve. The bypass pipe includes a main branch and a first branch and a second branch connected in parallel. The inlet end of the main branch is connected to the exhaust port of the gas buffer tank, and the outlet end of the main branch is connected to the inlet end of the first branch, the inlet end of the second branch, and the inlet of the second shut-off valve, respectively. The second flow meter is installed on the main branch, and the first shut-off valve and the regulating valve are respectively installed on... On the first and second branches, the outlet of the second shut-off valve is used to connect to the inlet of the control valve to be tested or the inlet of the quick-closing valve to be tested, which is placed on the control valve and quick-closing valve test bench. The inlet of the third shut-off valve is used to connect to the outlet of the control valve to be tested or the outlet of the quick-closing valve to be tested, which is placed on the control valve and quick-closing valve test bench. The expander test load assembly is used to connect to the power output end of the expander to be tested, which is placed on the expander test bench. The control device is electrically connected to the control valve and the quick-closing valve respectively to control the opening degree of the control valve and the quick-closing valve.

[0008] According to another aspect of the present invention, a test method for a multifunctional power machinery test platform is provided, including compressor performance test, expander performance test, regulating valve regulation characteristic test, and quick-closing valve safety characteristic test; The compressor test includes: Close the first intake valve, the first exhaust valve, the quick-closing valve, the second shut-off valve, and the third shut-off valve to keep the compressor in a stopped state at all times. Place the compressor under test on the compressor test bench, and connect the inlet and outlet of the compressor under test to the second suction valve and the second exhaust valve respectively, and connect the power input end of the compressor under test to the motor. Open the second intake valve, the second exhaust valve, the first shut-off valve, and the regulating valve. Start the compressor under test and make it work at the rated speed. Adjust the opening of the regulating valve to make the compressor under test reach the target pressure ratio. Determine whether the power of the compressor under test at the rated speed and target pressure ratio is less than the specified power value. The expander performance test includes: Place the expander to be tested on the expander test bench, and connect the air inlet and exhaust outlet of the expander to the outlet end of the expander's air inlet pipe and the inlet end of the expander's exhaust pipe, respectively. Connect the power output end of the expander to the expander test load assembly. Close the second intake valve, the second exhaust valve, the second shut-off valve, and the third shut-off valve; open the first intake valve, the first exhaust valve, the first shut-off valve, and the regulating valve; and start the compressor. Adjust the opening of the first shut-off valve and the regulating valve to make the expander under test work under no-load conditions at the rated speed. Load the expander through the expander test load component, and adjust the opening of the first shut-off valve and the regulating valve again to make the expander under test work under rated power conditions at the rated speed. Determine whether the efficiency of the expander under test at the rated speed and rated power is higher than the specified efficiency value. The regulating valve regulation characteristic test includes: Close the second intake valve, the second exhaust valve, the regulating valve, and the quick-closing valve; open the first shut-off valve, the second shut-off valve, and the third shut-off valve. Place the control valve to be tested on the control valve and quick-closing valve test bench, and connect the inlet and outlet of the control valve to the outlet of the second shut-off valve and the inlet of the third shut-off valve, respectively. Electrically connect the control valve to the control device. Place the expander to be tested on the expander test bench, and connect the air inlet and exhaust outlet of the expander to the outlet end of the expander air inlet pipe and the inlet end of the expander exhaust pipe, respectively. Connect the power output end of the expander to the expander test load assembly. Open the first intake valve and the first exhaust valve, and start the compressor; Close the first shut-off valve, open the quick-closing valve, and control the opening of the control valve under test through the control device to control the amount of air entering the expander, thereby obtaining the opening-flow curve of the control valve under test. The safety performance test of the quick-closing valve includes: Close the second intake valve, the second exhaust valve, and the quick-closing valve; open the regulating valve, the first shut-off valve, the second shut-off valve, and the third shut-off valve. Place the quick-closing valve to be tested on the control valve and quick-closing valve test bench, so that the inlet and outlet of the quick-closing valve to be tested are connected to the outlet of the second shut-off valve and the inlet of the third shut-off valve, respectively, and electrically connect the quick-closing valve to be tested to the control device. Open the first intake valve and the first exhaust valve, start the compressor, and control the compressor's exhaust pressure to the predetermined test pressure by controlling the first shut-off valve and the regulating valve; The control device controls the quick-closing valve under test to close, obtains the closing action time of the quick-closing valve under test, and determines whether the closing action time of the quick-closing valve under test is less than the specified closing action time.

[0009] Compared with conventional testing platforms, the present invention has at least the following advantages: 1. The test platform according to the embodiments of the present invention is not only applicable to the testing of a single type of product, but also applicable to the joint commissioning test of compressor main unit and unit, expander main unit and unit, regulating valve and quick-closing valve, thus enriching the platform's functions; 2. Compared with the conventional approach of using one testing platform for one product or one testing platform for one model, the testing platform according to the embodiments of the present invention can cover the functions of multiple platforms, thereby fully utilizing the functions of the testing platform, avoiding redundant construction, reducing initial investment in testing equipment, saving space, improving the utilization rate of testing equipment, and enhancing the economic efficiency of enterprises in the research and production process. 3. For testing compressors and units, this embodiment of the invention can achieve testing of the entire series of compressor products by adjusting the intake and exhaust valves. For testing expanders and units, the test platform of this embodiment of the invention can use compressors of different series to provide air sources, achieving testing of the entire series of expander products. The test platform has strong versatility and wide applicability. 4. For companies that have both compressor and expander products, they can use their own compressor products as test air source compressors for expander products, without the need to purchase dedicated air source compressor equipment. At the same time, a single test process can complete the test tasks of one compressor and one expander. This not only reduces test costs but also accelerates production capacity and shortens project cycles. Attached Figure Description

[0010] Figure 1 A schematic diagram of a multifunctional power machinery testing platform according to an embodiment of the present invention is shown. Detailed Implementation

[0011] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0012] Please see Figure 1According to an embodiment of the present invention, a multifunctional power machinery test platform includes a first intake valve 1, a second intake valve 1", a compressor 2, a compressor test stand 2", a motor 3, a first exhaust valve 4, a second exhaust valve 4", a gas buffer tank 5, a first flow meter 81, a second flow meter 82, a first shut-off valve 91, a second shut-off valve 92, a third shut-off valve 93, a regulating valve 10, a regulating valve and quick-closing valve test stand 10", a quick-closing valve 12, an expander test stand 13, an expander test load assembly, an expander intake pipe 61, an expander exhaust pipe 62, a bypass pipe 7, and a control device 18.

[0013] The first intake valve 1 is connected to the intake port of the compressor 2. The exhaust port of the compressor 2 is connected to the first intake port of the gas buffer tank 5 through the first exhaust valve 4. The motor 3 is detachably connected to the power input terminal of the compressor 2. The second intake valve 1" is used to connect to the intake port of the compressor under test placed on the compressor test bench 2. The second exhaust valve 4" is connected to the second intake port of the gas buffer tank 5 and is used to connect to the exhaust port of the compressor under test placed on the compressor test bench 1.

[0014] The exhaust port of the gas buffer tank 5 is connected to the inlet end of the expander inlet pipe 61. The outlet end of the expander inlet pipe 61 is used to connect to the inlet of the expander under test placed on the expander test stand 13. The inlet end of the expander exhaust pipe 62 is used to connect to the exhaust port of the expander under test placed on the expander test stand 13. A first flow meter 81 and a quick-closing valve 12 are installed on the expander inlet pipe 61, with the first flow meter 81 located upstream of the quick-closing valve 12. A one-way valve 16 is also provided on the expander exhaust pipe 62, which allows gas to flow from the exhaust port of the expander under test to the outlet end of the expander exhaust pipe 62 without backflow.

[0015] The bypass pipeline 7 includes a main branch 70 and two parallel branches 71 and 72. The inlet of the main branch 70 is connected to the exhaust port of the gas buffer tank 5, and the outlet of the main branch 70 is connected to the inlet of the first branch 71, the inlet of the second branch 72, and the inlet of the second shut-off valve 92. A second flow meter 82 is installed on the main branch 70. The first shut-off valve 91 and the regulating valve 10 are installed on the first branch 71 and the second branch 72, respectively. The outlet of the second shut-off valve 92 is used to connect to the inlet of the regulating valve to be tested or the inlet of the fast-closing valve to be tested, which is placed on the regulating valve and fast-closing valve test stand 10". The inlet of the third shut-off valve 93 is used to connect to the outlet of the regulating valve to be tested or the outlet of the fast-closing valve to be tested, which is placed on the regulating valve and fast-closing valve test stand 10".

[0016] In this embodiment, the outlet end of the expander exhaust pipe 62, the outlet end of the first branch 71, the outlet end of the second branch 72, and the outlet of the third shut-off valve 93 converge to the same exhaust outlet.

[0017] The expander test load assembly is used to connect to the power output terminal of the expander under test, which is placed on the expander test bench 13. In this embodiment, the expander test load assembly includes a gearbox 14, a generator 15, and a dry load box 17. The input terminal of the gearbox 14 is connected to the power output terminal of the expander under test, which is placed on the expander test bench 13. The output terminal of the gearbox 14 is connected to the input terminal of the generator 15, and the output terminal of the generator 15 is connected to the input terminal of the dry load box 17.

[0018] The control device 18 is electrically connected to the regulating valve 10 and the quick-closing valve 12 respectively to control the opening degree of the regulating valve 10 and the quick-closing valve 12.

[0019] In this embodiment, the operation of motor 3 is controlled by control device 18. Motor 3 is a variable frequency motor. Control device 18 is a PLC control cabinet. The bottom and top of the gas buffer tank are respectively provided with a drain port and a pressure relief port. The drain port is connected to the drain valve 51. The pressure relief port is connected to the safety valve 52.

[0020] In this embodiment, temperature and pressure remote transmission instruments are installed on the inlet and outlet pipelines of compressor 2 and the compressor under test, gas buffer tank 5, and the inlet and outlet pipelines of expander 13 under test. Measuring instruments for bearing vibration, housing vibration, bearing temperature, shaft displacement, and rotational speed are installed on compressor 2, the compressor under test, and the expander under test. The current and power values ​​of the variable frequency motor 3 can be read from the PLC control cabinet 18.

[0021] The multifunctional power machinery test platform of this embodiment can be used for compressor performance testing, expander performance testing, regulating valve regulation characteristic testing, and fast-closing valve safety characteristic testing. The following is a detailed introduction to this.

[0022] 1) Compressor performance test The mechanical operation test and air performance test of the compressor under test can be realized by using the second intake valve 1", motor 3, second exhaust valve 4, gas buffer tank 5, safety valve 52, drain valve 51, compressor test station 2", second flow meter 82, first shut-off valve 91, regulating valve 10 and quick-closing valve 12.

[0023] During the compressor performance test, the first intake valve 1 and the first exhaust valve 4 are always closed, and the compressor 2 is always stopped. The quick-closing valve 12 is always closed, and the expander and its auxiliary equipment are not involved in the test. The second shut-off valve 92 and the third shut-off valve 93 are always fully closed, and the regulating valve or quick-closing valve to be tested is not involved in the test.

[0024] In one specific implementation, the compressor testing process includes the following steps: Close the first intake valve 1, the first exhaust valve 4, the quick-closing valve 12, the drain valve 51, the second shut-off valve 92 and the third shut-off valve 92 to keep the compressor 2 in a stopped state at all times. Place the compressor to be tested on the compressor test bench 2”, and connect the inlet and outlet of the compressor to be tested 2 to the second suction valve 1” and the second exhaust valve 4” respectively, and connect the power input end of the compressor to be tested to the motor 3. Open the second intake valve 1", the second exhaust valve 4", the first shut-off valve 91 and the regulating valve 10, start the compressor under test and make the compressor under test work at the rated speed. Adjust the opening of the regulating valve 10 to make the compressor under test reach the target pressure ratio, and determine whether the power of the compressor under test at the rated speed and target pressure ratio is less than the specified power value.

[0025] The above only illustrates the usage of the multi-functional power machinery test platform of this invention embodiment using compressor power consumption testing. The multi-functional power machinery test platform of this invention embodiment can also conduct other types of mechanical operation tests or air performance tests on the compressor. Similarly, the first intake valve 1 is fully closed, the first exhaust valve 4 is fully closed, the drain valve 51 is fully closed, the quick-closing valve 12 is fully closed, the first shut-off valve 91 is fully open, and the regulating valve 10 is fully open.

[0026] If the power consumed by the compressor under test under rated operating conditions does not exceed the power consumption limit of the test platform, the compressor discharge pressure can be increased by directly reducing the opening of the second exhaust valve 4" until the required discharge pressure or pressure ratio is reached. The compressor air volume is obtained through the second flow meter 82.

[0027] If the power consumption of the compressor under test exceeds the power limit of the test platform under rated operating conditions, an analogy method is used for testing, ensuring that the rated pressure ratio is achieved. Specifically, this involves creating a negative suction pressure by partially closing the second suction valve 1", reducing the compressor's intake air volume, and simultaneously partially closing the second exhaust valve 4" to achieve the compressor's pressure ratio. The compressor's air volume is obtained through the second flow meter 82. This method is commonly used for testing large compressors. Its advantage is that it can fully test the compressor's performance without exceeding the power limit by using excessive motor power.

[0028] 2) Expander performance test Using the first intake valve 1, compressor 2, motor 3, first exhaust valve 4, gas buffer tank 5, safety valve 52, drain valve 51, first shut-off valve 91, regulating valve 10, first flow meter 81, quick-closing valve 12, expander test station 13, gearbox 14, generator 15, one-way valve 16, dry load box 17, and PLC control cabinet 18, the mechanical operation test and air performance test of the expander under test can be realized.

[0029] During the expander performance test, the second intake valve 1" and the second exhaust valve 4" remain closed, and the compressor under test does not participate in the test. The second shut-off valve 92 and the third shut-off valve 93 remain fully closed, and the regulating valve or quick-closing valve under test does not participate in the test.

[0030] In one specific implementation, the expander performance test includes the following steps: Place the expander to be tested on the expander test bench 13, and connect the air inlet and exhaust outlet of the expander to the outlet end of the expander air inlet pipe 61 and the inlet end of the expander exhaust pipe 62, respectively. Connect the power output end of the expander to the expander test load assembly. Close the second intake valve 1", the second exhaust valve 4", the second stop valve 92, the third stop valve 93 and the drain valve 51, open the first intake valve 1, the first exhaust valve 4, the first stop valve 91 and the regulating valve 10, and start the compressor; Adjust the opening of the first shut-off valve 91 and the regulating valve 10 to make the expander under test work under no-load conditions at rated speed. Apply load through the expander test load component. Adjust the opening of the first shut-off valve 91 and the regulating valve 10 again to make the expander under test work under rated power conditions at rated speed. Determine whether the efficiency of the expander under test at rated speed and rated power is higher than the specified efficiency value.

[0031] The above description only illustrates the usage of the multifunctional power machinery test platform of this invention using expander power consumption testing. The multifunctional power machinery test platform of this invention can also be used to conduct other types of mechanical operation tests or aerodynamic performance tests on expanders.

[0032] When conducting mechanical operation or aerodynamic performance tests on the expander under test, compressor 2 is used as the gas source to provide high-pressure gas. After being stabilized by gas buffer tank 5, the high-pressure gas is divided into two paths: one path enters the expander inlet pipe 61, passes through the first flow meter 81 and quick-closing valve 12 in sequence, and then enters the expander under test. The expanded gas passes through check valve 16 and is discharged through expander exhaust pipe 62. The expander speed is reduced to generator speed by reduction gearbox 14. The mechanical work of expansion is converted into electrical energy by generator 15, and the electrical energy is consumed through dry load box 17. The dry load box can display parameters such as generator voltage, current, and generator power. The other path of gas goes through bypass pipe 7, passes through the second flow meter 82, the first shut-off valve 91 and regulating valve 10 in sequence, and is discharged from the exhaust outlet.

[0033] First, confirm that all valves are in the required positions: first intake valve 1 fully open, first exhaust valve 4 fully open, drain valve 51 fully closed, first shut-off valve 91 fully open, regulating valve 10 fully open, and quick-closing valve 12 fully closed. The opening of regulating valve 10 and quick-closing valve 12 is controlled by PLC control cabinet 18. Start compressor 2; compressor exhaust is released through bypass pipe 7. Fully open quick-closing valve 12, and slowly close first shut-off valve 91 until fully closed. The intake pressure of the expander under test will increase. Then, slowly close regulating valve 10; the intake pressure of the expander under test will further increase until a certain pressure is reached, at which point the expander under test will start rotating. Continue to close the opening of regulating valve 10; the expander will continue to increase speed until it reaches the rated speed. After reaching the rated speed, the generator reaches the grid-connected speed. The dry load box 17 is opened and loading is performed. The expansion speed is maintained at the rated speed by reducing the opening of the regulating valve 10. Loading continues until the regulating valve 10 is fully closed, reaching the full gas volume power generation state. The air intake of the expansion is obtained by the first flow meter 81.

[0034] 3) Control valve regulation characteristic test The regulating characteristics of the regulating valve can be tested using the following components: first intake valve 1, compressor 2, motor 3, first exhaust valve 4, gas buffer tank 5, safety valve 52, drain valve 52, second flow meter 82, first shut-off valve 91, regulating valve and quick-closing valve test stand 10", quick-closing valve 12, expander 13, gearbox 14, generator 15, one-way valve 16, dry load box 17, PLC control cabinet 18, second shut-off valve 92 and third shut-off valve 93.

[0035] In one specific implementation, the regulating valve regulation characteristic test includes the following steps: Close the second intake valve 1", the second exhaust valve 4", the drain valve 51, the regulating valve 10 and the quick-closing valve 12, and open the first stop valve 91, the second stop valve 92 and the third stop valve 93. Place the control valve to be tested on the control valve and quick-closing valve test bench 10”, so that the inlet and outlet of the control valve to be tested are connected to the outlet of the second shut-off valve 92 and the inlet of the third shut-off valve 93 respectively, and electrically connect the control valve to be tested to the control device 18; place the expander to be tested on the expander test bench 13, and connect the air inlet and exhaust outlet of the expander to the outlet end of the expander air inlet pipe 61 and the inlet end of the expander exhaust pipe 62 respectively, and connect the power output end of the expander to the expander test load assembly; Open the first intake valve 1 and the first exhaust valve 4, and start the compressor 2; Close the first shut-off valve 91, open the quick-closing valve 12, and control the opening degree of the control valve under test through the control device 18 to control the amount of gas entering the expander, thereby obtaining the opening degree-flow curve of the control valve under test, the valve pressure loss characteristics under different opening degrees, and the regulation characteristics such as regulation accuracy and response speed.

[0036] After compressor 2 is turned on, the exhaust gas from compressor 2 passes through the first exhaust valve 4, the gas buffer tank 5, the second flow meter 82, the first shut-off valve 91, and the regulating valve to be tested before being discharged.

[0037] 4) Safety characteristics test of quick-closing valve By utilizing the first intake valve 1, compressor 2, motor 3, first exhaust valve 4, gas buffer tank 5, safety valve 52, drain valve 51, second flow meter 82, first shut-off valve 91, regulating valve 10, regulating valve and quick-closing valve test stand 10", PLC control cabinet 18, second shut-off valve 92 and third shut-off valve 93, the safety characteristics test and sealing test of the quick-closing valve can be realized.

[0038] In one specific implementation, the safety characteristic test of the quick-closing valve includes the following steps: Close the second intake valve 1", the second exhaust valve 4", the drain valve 51 and the quick-closing valve 12, and open the regulating valve 10, the first shut-off valve 91, the second shut-off valve 92 and the third shut-off valve 93. Place the quick-closing valve to be tested on the regulating valve and quick-closing valve test bench 10”, so that the inlet and outlet of the quick-closing valve to be tested are connected to the outlet of the second shut-off valve 92 and the inlet of the third shut-off valve 93 respectively, and electrically connect the quick-closing valve to be tested to the control device 18. Open the first intake valve 1 and the first exhaust valve 4, start the compressor 2, and control the compressor's exhaust pressure to the predetermined test pressure by controlling the first shut-off valve 91 and the regulating valve 10; The control device controls the quick-closing valve under test to change from a fully open state to a closed state, obtains the closing action time of the quick-closing valve under test, and determines whether the closing action time of the quick-closing valve under test is less than the specified closing action time.

[0039] After compressor 2 is turned on, the exhaust gas from compressor 2 passes sequentially through exhaust valve 4, gas buffer tank 5, second flow meter 82, first shut-off valve 91, and regulating valve 10 before being discharged. Slowly close the first shut-off valve 91 until it is fully closed, and then slowly close the regulating valve 10 to control the compressor exhaust pressure to the predetermined test pressure.

[0040] After the PLC control cabinet controls the fast-closing valve under test to complete the closing action, the PLC control cabinet 18 will receive the closing signal of the fast-closing valve under test. The time interval between the signal points from fully open to fully closed of the fast-closing valve under test can be obtained by using the oscilloscope in the PLC control cabinet, thereby obtaining the closing action time of the fast-closing valve under test, and thus verifying whether it meets the unit's safety protection requirements.

[0041] The above description is a further illustration of the present invention in conjunction with specific embodiments and accompanying drawings. However, the present invention can obviously be implemented in many other ways different from those described herein, and those skilled in the art can extend and deduce it according to actual use without departing from the content of the present invention. Therefore, the content of the above specific embodiments should not limit the scope of protection defined by the present invention.

Claims

1. A multifunctional power machinery testing platform, characterized in that, It includes a first intake valve, a second intake valve, a compressor, a motor, a compressor test stand, a first exhaust valve, a second exhaust valve, a gas buffer tank, a first flow meter, a second flow meter, a first shut-off valve, a second shut-off valve, a third shut-off valve, a regulating valve, a quick-closing valve, a regulating valve and quick-closing valve test stand, an expander test stand, an expander test load assembly, an expander intake pipe, an expander exhaust pipe, a bypass pipe, and a control device; The first suction valve is connected to the air inlet of the compressor, and the air outlet of the compressor is connected to the first air inlet of the gas buffer tank through the first exhaust valve. The motor is detachably connected to the power input terminal of the compressor. The second suction valve is used to connect to the air inlet of the compressor under test placed on the compressor test bench. The second exhaust valve is connected to the second air inlet of the gas buffer tank and is used to connect to the exhaust port of the compressor under test placed on the compressor test bench. The exhaust port of the gas buffer tank is connected to the inlet end of the expander inlet pipe, the outlet end of the expander inlet pipe is used to connect to the inlet of the expander to be tested placed on the expander test bench, and the inlet end of the expander exhaust pipe is used to connect to the exhaust port of the expander to be tested placed on the expander test bench; the first flow meter and the quick-closing valve are installed on the expander inlet pipe, and the first flow meter is located upstream of the quick-closing valve; The bypass pipeline includes a main branch and a first branch and a second branch connected in parallel. The inlet of the main branch is connected to the exhaust port of the gas buffer tank, and the outlet of the main branch is connected to the inlet of the first branch, the inlet of the second branch, and the inlet of the second shut-off valve. The second flow meter is installed on the main branch, and the first shut-off valve and the regulating valve are installed on the first branch and the second branch, respectively. The outlet of the second shut-off valve is used to connect to the inlet of the regulating valve to be tested or the inlet of the fast-closing valve to be tested, which is placed on the regulating valve and fast-closing valve test bench. The inlet of the third shut-off valve is used to connect to the outlet of the regulating valve to be tested or the outlet of the fast-closing valve to be tested, which is placed on the regulating valve and fast-closing valve test bench. The outlet of the expander exhaust pipeline, the outlet of the first branch, the outlet of the second branch, and the outlet of the third shut-off valve converge to the same exhaust outlet. The expander test load assembly is used to connect to the power output end of the expander to be tested, which is placed on the expander test bench. The control device is electrically connected to the regulating valve and the quick-closing valve respectively to control the opening degree of the regulating valve and the quick-closing valve.

2. The multifunctional power machinery testing platform according to claim 1, characterized in that, The expander test load assembly includes a gearbox, a generator, and a dry load box; The input end of the gearbox is used to connect to the power output end of the expander to be tested, which is placed on the expander test bench. The output end of the gearbox is connected to the input end of the generator, and the output end of the generator is connected to the input end of the dry load box.

3. The multifunctional power machinery testing platform according to claim 1, characterized in that, The expander exhaust pipe is equipped with a one-way valve.

4. The multifunctional power machinery testing platform according to claim 1, characterized in that, The bottom of the gas buffer tank is provided with a drain port, which is connected to a drain valve.

5. The multifunctional power machinery testing platform according to claim 1, characterized in that, The gas buffer tank is provided with a pressure relief port at the top, which is connected to a safety valve.

6. The multifunctional power machinery testing platform according to claim 1, characterized in that, The control device includes a PLC control cabinet.

7. The test method of the multifunctional power machinery test platform according to claim 1, characterized in that, This includes compressor performance testing, expander performance testing, regulating valve regulation characteristic testing, and quick-closing valve safety characteristic testing; The compressor test includes: Close the first intake valve, the first exhaust valve, the quick-closing valve, the second shut-off valve, and the third shut-off valve to keep the compressor in a stopped state at all times. Place the compressor under test on the compressor test bench, and connect the inlet and outlet of the compressor under test to the second suction valve and the second exhaust valve respectively, and connect the power input end of the compressor under test to the motor. Open the second intake valve, the second exhaust valve, the first shut-off valve, and the regulating valve; start the compressor under test and make it work at the rated speed; adjust the opening of the regulating valve to make the compressor under test reach the target pressure ratio; and determine whether the power of the compressor under test at the rated speed and the target pressure ratio is less than the specified power value. The expander performance test includes: Place the expander to be tested on the expander test bench, and connect the air inlet and exhaust outlet of the expander to the outlet end of the expander's air inlet pipe and the inlet end of the expander's exhaust pipe, respectively. Connect the power output end of the expander to the expander test load assembly. Close the second intake valve, the second exhaust valve, the second shut-off valve, and the third shut-off valve; open the first intake valve, the first exhaust valve, the first shut-off valve, and the regulating valve; and start the compressor. Adjust the opening of the first shut-off valve and the regulating valve to make the expander under test work under no-load conditions at the rated speed. Load the expander through the expander test load component, and adjust the opening of the first shut-off valve and the regulating valve again to make the expander under test work under rated power conditions at the rated speed. Determine whether the efficiency of the expander under test at the rated speed and rated power is higher than the specified efficiency value. The regulating valve regulation characteristic test includes: Close the second intake valve, the second exhaust valve, the regulating valve, and the quick-closing valve; open the first shut-off valve, the second shut-off valve, and the third shut-off valve. Place the control valve to be tested on the control valve and quick-closing valve test bench, and connect the inlet and outlet of the control valve to the outlet of the second shut-off valve and the inlet of the third shut-off valve, respectively. Electrically connect the control valve to the control device. Place the expander to be tested on the expander test bench, and connect the air inlet and exhaust outlet of the expander to the outlet end of the expander air inlet pipe and the inlet end of the expander exhaust pipe, respectively. Connect the power output end of the expander to the expander test load assembly. Open the first intake valve and the first exhaust valve, and start the compressor; Close the first shut-off valve, open the quick-closing valve, and control the opening of the control valve under test through the control device to control the amount of air entering the expander, thereby obtaining the opening-flow curve of the control valve under test. The safety performance test of the quick-closing valve includes: Close the second intake valve, the second exhaust valve, and the quick-closing valve; open the regulating valve, the first shut-off valve, the second shut-off valve, and the third shut-off valve. Place the quick-closing valve to be tested on the control valve and quick-closing valve test bench, so that the inlet and outlet of the quick-closing valve to be tested are connected to the outlet of the second shut-off valve and the inlet of the third shut-off valve, respectively, and electrically connect the quick-closing valve to be tested to the control device. Open the first intake valve and the first exhaust valve, start the compressor, and control the compressor's exhaust pressure to the predetermined test pressure by controlling the first shut-off valve and the regulating valve; The control device controls the quick-closing valve under test to close, obtains the closing action time of the quick-closing valve under test, and determines whether the closing action time of the quick-closing valve under test is less than the specified closing action time.

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