Test system and method for throttling and panting of exhaust gas from compressor tester

Abstract

The present application provides a test system and method for throttling and desurge of the exhaust gas of a compressor tester. The test system includes: an exhaust volute assembly; a throttling exhaust device connected to the rear side of the exhaust volute assembly, which has multiple parallel exhaust pipelines, the exhaust pipeline includes an exhaust main pipeline, an exhaust auxiliary pipeline and a desurge pipeline, the exhaust auxiliary pipeline and the desurge pipeline converge on the exhaust main pipeline, and the three pipelines are respectively provided with first to third valves; an exhaust branch pipeline connected to the rear side of the throttling exhaust device, which has at least two parallel branch pipelines, each of which is sequentially provided with a guide assembly, a venturi nozzle and an exhaust silencer assembly, and a fourth valve is provided on one of the branch pipelines, and the fourth valve is located between the venturi nozzle and the exhaust silencer assembly. This test system can improve the adjustment accuracy of the compressor test state and achieve rapid desurge after surge, reduce the test risk caused by a single valve failure, and ensure the safety of the test and equipment.

Description

Technical Field

[0001] The present application belongs to the field of compressor test technology, and in particular relates to a test system and method for throttling and de-gassing of the exhaust of a compressor tester. Background Art

[0002] Surge boundary admission test is an important part of compressor component testing. In the surge boundary admission test, the outlet back pressure of the compressor is changed through exhaust throttling adjustment to obtain the overall performance and basic performance of the compressor from the maximum flow state to the stable operating limit.

[0003] In order to meet the requirements of surge boundary admission test, a test system for compressor tester external exhaust throttling and de-surge is needed. The test system needs to have the following capabilities: first, it can accurately control the flow and pressure state of the compressor outlet; second, after the compressor surges, it can quickly open to increase the exhaust flow area to make the compressor exit the unstable state.

[0004] Currently available exhaust throttling devices mainly include louver-type structures in annular channels, disc-type structures, and valves installed in the circular tube channel behind the volute. When the exhaust outlet location space is limited, a valve is usually installed in the circular tube channel behind the volute, and this type of device often uses a single regulating valve. However, the flow area adjustment rule of a single regulating valve is relatively fixed, and the valve usually has poor adjustment capabilities in the initial and final stages of adjustment, with low response accuracy, affecting the adjustment of the compressor test state. At the same time, a single regulating valve has the risk of failure such as sticking and full closure, which poses a great threat to the compressor test piece and equipment. A single regulating valve usually does not have a quick opening function and cannot meet the rapid de-surge requirements of the surge test. Summary of the Invention

[0005] The purpose of the present application is to provide a test system and method for throttling and back-surge of the exhaust of a compressor tester, so as to solve or alleviate at least one problem in the background technology.

[0006] The technical solution of the present application is: a test system for throttling and gasping of the exhaust gas of a compressor tester, the test system comprising:

[0007] exhaust volute assembly;

[0008] A throttle exhaust device connected to the rear side of the exhaust volute assembly, the throttle exhaust device having a plurality of exhaust pipes connected in parallel, the exhaust pipes including a main exhaust pipe, a secondary exhaust pipe, and a gas-relief pipe, the secondary exhaust pipe and the gas-relief pipe converging on the main exhaust pipe, the main exhaust pipe, the secondary exhaust pipe, and the gas-relief pipe being respectively provided with a first valve, a second valve, and a third valve;

[0009] An exhaust branch pipe is connected to the rear side of the throttling exhaust device, and the exhaust branch pipe has at least two parallel branch pipes. A guide component, a venturi nozzle and an exhaust silencer component are sequentially provided on each branch pipe. A fourth valve is provided on one of the branch pipes, and the fourth valve is located between the venturi nozzle and the exhaust silencer component.

[0010] Furthermore, the diameter of the first valve is equal to the outlet diameter of the exhaust volute assembly.

[0011] Furthermore, the ratio of the diameter of the second valve to the diameter of the first valve is 1:4 to 1:5.

[0012] Furthermore, the control accuracy of the first valve is lower than the control accuracy of the second valve.

[0013] Furthermore, the first valve and the second valve are electrically adjustable butterfly valves, and the third valve is a pneumatic valve.

[0014] Furthermore, the full-opening response time of the third valve is ≤1s.

[0015] Furthermore, the ratio of the flow area of ​​the fully opened third valve to the exhaust throat area of ​​the compressor tester is 1:10 to 1:5.

[0016] Furthermore, the fourth valve is an electric valve.

[0017] Furthermore, it also includes a bracket assembly, which supports the exhaust throttling device and / or the exhaust branch line.

[0018] On the other hand, the present application provides a test method, which is based on any of the above-mentioned systems for throttling and throttling the outer exhaust of a compressor tester, and the test method comprises:

[0019] A compressor run-in test and a compressor characteristic acquisition test. During the compressor run-in test, the compressor outlet back pressure is adjusted by the first valve to ensure that the compressor is in a blocking state. At this time, the second valve is in a fully open state and the third valve is in a fully closed state.

[0020] During the compressor characteristic test, the second valve is used to precisely adjust the compressor outlet back pressure. At this time, the first valve position remains unchanged to keep the compressor in a blocked state, and the third valve is in a fully closed state.

[0021] When the characteristic is recorded to the surge boundary, the compressor surges, and the surge signal is associated with the third valve. The third valve opens quickly, and the positions of the first valve and the second valve remain unchanged.

[0022] The test system and the test method based on the test system provided in this application can improve the adjustment accuracy of the compressor test state and achieve rapid de-surge after surge. At the same time, it can reduce the test risk caused by a single valve failure and ensure the safety of the test piece and equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions provided by this application, the following is a brief introduction to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of this application.

[0024] Figure 1 Schematic diagram of the test system for the external exhaust throttling and panting of this application.

[0025] Figure 2 Schematic diagram of the exhaust throttling device in this application. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solutions and advantages of the implementation of this application clearer, the technical solutions in the embodiments of this application will be described in more detail below in conjunction with the drawings in the embodiments of this application.

[0027] In order to address the shortcomings of the prior art in which a single regulating valve is set in the circular pipe channel behind the volute, this application sets multiple sets of valves used in parallel at the exhaust throttling device, and realizes precise adjustment of the compressor test state and safe decompression by using each valve in parallel.

[0028] like Figure 1 and Figure 2 As shown, the present application first provides a test system for throttling and gasping of the exhaust of a compressor test piece, the test system comprising:

[0029] Exhaust volute assembly 11;

[0030] The exhaust throttling device 12 is arranged at the rear side of the exhaust volute assembly 11. The exhaust throttling device 12 has multiple exhaust pipelines arranged in parallel, wherein these exhaust pipelines include an exhaust main pipeline 121, an exhaust sub-pipeline 122, and a gas-relief pipeline 123. The exhaust main pipeline 121 is connected to the exhaust port of the exhaust volute assembly 1. The exhaust sub-pipeline 122 and the gas-relief pipeline 123 are led out from the left side of the exhaust main pipeline 121 and connected to the right side of the exhaust main pipeline 121. The exhaust main pipeline 121, the exhaust sub-pipeline 122, and the gas-relief pipeline 123 are respectively provided with a first valve 124 (located between the connection points of the exhaust sub-pipeline 122 and the gas-relief pipeline 123 with the exhaust main pipeline 121), a second valve 125, and a third valve 126;

[0031] The exhaust branch pipe 14 is connected to the rear side of the exhaust throttling device 2, and the exhaust branch pipe 14 is connected to the end of the exhaust main pipe 121 after convergence. The exhaust branch pipe 14 has at least two parallel branch pipes, and each branch pipe is provided with a guide component 15, a Venturi nozzle 16 and an exhaust silencer component 18 in sequence, wherein one of the branch pipes is provided with a fourth valve 17, and the fourth valve 17 is located between the Venturi nozzle 16 and the exhaust silencer component 18. Preferably, the fourth valve 17 is an electric valve.

[0032] The test system proposed in this application utilizes multiple sets of valves with different functions in the exhaust throttling device 12 in parallel to achieve the throttling and rapid breathing-out functions of the external exhaust.

[0033] In the present application, the number of parallel valves and the function of each valve group are determined according to the functional requirements of the compressor test for the outer sump exhaust. Specifically, the functional requirements of the compressor test for the outer sump exhaust are: first, precise control of the flow and pressure state of the compressor outlet; second, after the compressor surges, the ability to quickly open and increase the exhaust flow area to make the compressor exit the unstable state. In accordance with the need for precise control of the outer sump state, the present application provides a first valve 124 and a second valve 125. The first valve 124 is used to adjust the blockage state of the compressor test, and the second valve 125 is used to adjust the back pressure state during compressor characteristic recording. The third valve 126 is provided according to the need for de-surge, and the three valves are connected in parallel according to the above functional allocation. Among them, the adjustment accuracy of the first valve 124 is lower than that of the second valve 125. Therefore, the first valve 124 can be called a coarse adjustment valve, the second valve 125 can be called a fine adjustment valve, and the third valve 126 can be called a de-surge valve.

[0034] In some embodiments of the present application, both the first valve 124 and the second valve 125 are electrically adjustable butterfly valves, and have a small pressure loss in the fully open state. Furthermore, the diameters of the first valve 124 and the second valve 125 are determined according to the outlet diameter of the exhaust volute, wherein the diameter of the first valve 124 is equal to the outlet diameter of the exhaust volute, and according to the compressor test state adjustment requirements, the diameter ratio of the second valve 125 to the diameter ratio of the first valve 124 is configured to be 1:4 to 1:5. In addition, in a preferred embodiment of the present application, the third valve 126 is a pneumatic quick-opening valve with an opening time of ≤1s. According to the compressor test degassing requirements, the ratio of the flow area of ​​the fully opened third valve to the exhaust throat area of ​​the compressor test piece is determined to be 1:10 to 1:5.

[0035] Finally, the test system of the present application further includes a bracket assembly 13 , which is disposed on the lower side of the exhaust throttling device 12 and / or the exhaust branch pipe 15 to support the exhaust throttling device 12 and / or the exhaust branch pipe 15 .

[0036] In another aspect of the present application, the present application further provides a test method using the above-mentioned test system for completing a compressor test, wherein the compressor test includes a running-in test and a characteristic acquisition test, wherein:

[0037] 1) During the running-in test, the compressor outlet back pressure is adjusted by the first valve 124 to ensure that the compressor is in a blocking state. At this time, the second valve 125 is fully opened and the third valve 126 is fully closed;

[0038] 2) During the characteristic test, the compressor outlet back pressure is precisely adjusted through the second valve 125. At this time, the position of the first valve 124, which is in a blocked state, remains unchanged, and the third valve 126 is in a fully closed state;

[0039] 3) When the characteristic recording reaches the surge boundary and the compressor surges, the surge signal is associated with the third valve 126. The surge signal causes the third valve 126 to open quickly, while the positions of the first valve 124 and the second valve 125 remain unchanged, thereby completing the de-surge.

[0040] The test system provided in the present application uses the first valve and the second valve in parallel to achieve a combination of different flow area adjustment rules, meet the adjustment requirements of different states of the test piece, and improve the adjustment accuracy of the compressor test state; by using the first valve, the second valve and the third valve in parallel, when a valve has a stuck, fully closed or other faults, the other valves are used to assist in adjustment to reduce the state of the compressor tester, thereby ensuring the safety of the compressor tester and equipment; by introducing the third valve, the compressor tester can be quickly opened when surge occurs, ensuring that the compressor tester quickly exits the surge instability state.

[0041] The test system and the test method based on the test system provided in this application can improve the adjustment accuracy of the compressor test state and achieve rapid de-surge after surge. At the same time, it can reduce the test risk caused by a single valve failure and ensure the safety of the test piece and equipment.

[0042] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A test method for a compressor tester's by-pass exhaust throttling and gasp test system, characterized in that: The test system comprises: exhaust volute assembly (11); A throttle exhaust device (12) is connected to the rear side of the exhaust volute assembly (11), wherein the throttle exhaust device (12) has a plurality of exhaust pipes connected in parallel, wherein the exhaust pipes include an exhaust main pipe (121), an exhaust auxiliary pipe (122), and a gas-relief pipe (123), wherein the exhaust auxiliary pipe (122) and the gas-relief pipe (123) converge on the exhaust main pipe (121), and the exhaust main pipe (121), the exhaust auxiliary pipe (122), and the gas-relief pipe (123) are respectively provided with A first valve (124), a second valve (125) and a third valve (126), wherein the diameter of the first valve (124) is equal to the outlet diameter of the exhaust volute assembly (11), the ratio of the diameter of the second valve (125) to the diameter of the first valve (124) is 1:4 to 1:5, the full-open response time of the third valve (126) is ≤ 1s, and the ratio of the flow area of ​​the fully-open third valve (126) to the exhaust throat area of ​​the compressor tester is 1:10 to 1:5; An exhaust branch pipe (14) connected to the rear side of the throttling exhaust device (12), the exhaust branch pipe (14) having at least two parallel branch pipes, each branch pipe being provided with a flow guide assembly (15), a venturi nozzle (16) and an exhaust silencer assembly (18) in sequence, and a fourth valve (17) being provided on one of the branch pipes, the fourth valve (17) being located between the venturi nozzle (16) and the exhaust silencer assembly (18); The test method includes: A compressor running-in test and a compressor characteristic recording test, wherein during the compressor running-in test, the compressor outlet back pressure is adjusted by the first valve (124) to ensure that the compressor is in a blocking state, at which time the second valve (125) is in a fully open state and the third valve (126) is in a fully closed state; During the compressor characteristic test, the compressor outlet back pressure is precisely adjusted by the second valve (125), while the first valve (124) remains in a fixed position to keep the compressor in a blocked state, and the third valve (126) is in a fully closed state; When the characteristic is recorded to the surge boundary, the compressor surges, and the surge signal is associated with the third valve (126). The third valve (126) opens quickly, and the positions of the first valve (124) and the second valve (125) remain unchanged.

2. The test method according to claim 1, wherein The control accuracy of the first valve (124) is lower than the control accuracy of the second valve (125).

3. The test method according to claim 2, wherein The first valve and the second valve are electrically adjustable butterfly valves, and the third valve is a pneumatic valve.

4. The test method according to claim 1, wherein The fourth valve is an electric valve.

5. The test method according to claim 1, wherein It also includes a bracket assembly (13), wherein the bracket assembly (13) supports the throttle exhaust device (12) and / or the exhaust branch line (14).

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