Method and system for measuring leakage amount of engine casing

Abstract

The invention provides a method and system for measuring the leakage amount of an engine casing, and the method comprises the following steps: S1, plugging the front and rear installation edges of the engine casing, and installing a thermometer and a pressure gauge on a casing plugging tool and a simulation cabin respectively; s2, connecting an air source, an adjusting valve, a flow divider, an engine casing, a simulation cabin and a flow meter; s3, an adjusting valve is opened, and the airflow is divided into two same streams through a flow divider and enters an engine case and a simulation cabin respectively; s4, adjusting the adjusting valve, and waiting until the gas pressure in the engine case is constant, and the gas pressure and the temperature are constant; and S5, adjusting the size of a gas outlet in the simulation cabin, so that the gas pressure and temperature in the simulation cabin are consistent with the gas pressure and temperature in the engine case, and the display value of a flowmeter on the simulation cabin is the gas leakage amount of the engine case. According to the invention, the leakage amount of the engine casing is accurately and conveniently obtained, and the influence of leakage on the working efficiency of the engine is evaluated.

Description

Technical Field

[0001] The present invention relates to the field of engine assembly, and particularly to a method and a system for measuring the leakage amount of an engine casing. Background Art

[0002] In the prior art, when a gas turbine engine operates, air is compressed by a compressor, and after the pressure and temperature increase, it enters a combustion chamber to mix and burn with fuel, forming high-temperature and high-pressure gas, thereby driving a turbine to do work to generate power.

[0003] During the working process, the leakage of gas will directly affect the work efficiency of the engine. Therefore, it is necessary to check the sealing performance of the casing during the engine assembly process.

[0004] However, due to the complex structure of the engine casing, taking the engine casing as an example. Figure 1 It is a schematic structural diagram of the engine casing. As Figure 1 shown, a large number of mounting seats 20 are distributed on the outer wall of the engine casing 10 for installing borescope plugs, temperature measuring or pressure measuring sensors, etc. When the engine operates, air leakage may occur at the joints of the mounting seats and the mounting edges (the front mounting edge 11 and the rear mounting edge 12 of the engine casing) due to poor sealing performance.

[0005] However, the conventional sealing performance check can only know whether each casing leaks air and the leakage points, and cannot measure or calculate the air leakage amount of the casing.

[0006] In view of this, the inventors of the present application have designed a method and a system for measuring the leakage amount of an engine casing in order to overcome the above technical problems. Summary of the Invention

[0007] The technical problem to be solved by the present invention is to provide a method and a system for measuring the leakage amount of an engine casing in order to overcome the defect that the sealing performance check in the prior art cannot measure or calculate the air leakage amount of the casing.

[0008] The present invention solves the above technical problems by the following technical solutions:

[0009] A method for measuring the leakage amount of an engine casing, characterized in that the method for measuring the leakage amount of the engine casing includes the following steps:

[0010] S 1 Seal the front and rear mounting edges of the engine casing with a plugging tool, and install a thermometer and a pressure gauge on the casing plugging tool and the simulation chamber respectively;

[0011] S 2 Connect a gas source, a regulating valve, a diverter, the engine casing, the simulation chamber and a flow meter;

[0012] S3 1. Open the regulating valve. The air flow is divided into two equal parts by the shunt and enters the engine casing and the simulation cabin respectively.

[0013] S 4 2. Adjust the regulating valve and wait until the gas pressure in the engine casing is constant, and the gas pressure and temperature are constant.

[0014] S 5 3. Adjust the size of the air vent on the simulation cabin so that the gas pressure and temperature in the simulation cabin are the same as those in the engine casing. The displayed value of the flow meter on the simulation cabin is the gas leakage amount of the engine casing.

[0015] According to an embodiment of the present invention, in step S 4 Obtain the temperature and pressure data through a thermometer and a flow meter.

[0016] According to an embodiment of the present invention, in step S 2 the engine casing is an engine casing with a plugging tool, and the simulation cabin is a simulation cabin with an adjustable air vent.

[0017] The present invention provides a measurement system for the leakage amount of an engine casing. The measurement system for the leakage amount of the engine casing adopts the measurement method for the leakage amount of the engine casing as described above. The measurement system includes a regulating valve, a shunt, and a simulation cabin. The inlet of the regulating valve is connected to a gas source, the outlet of the regulating valve is connected to the inlet of the shunt, and the outlets of the shunt are respectively connected to the engine casing and the simulation cabin to send the air flow into the engine casing and the simulation cabin.

[0018] The engine casing and the simulation cabin are respectively connected with a thermometer and a pressure gauge for measuring the temperature and gas pressure.

[0019] According to an embodiment of the present invention, the engine casing is equipped with a plugging tool.

[0020] According to an embodiment of the present invention, an adjustable air vent is provided on the simulation cabin.

[0021] According to an embodiment of the present invention, the adjustable air vent is opened at the lower part of the simulation cabin.

[0022] According to an embodiment of the present invention, a flow meter is installed at the adjustable air vent.

[0023] The positive and progressive effects of the present invention are as follows:

[0024] The measuring method and measuring system for the leakage volume of the engine casing of the present invention can accurately and conveniently obtain the leakage volume of the engine casing and evaluate the influence of the leakage on the working efficiency of the engine. Brief Description of the Drawings

[0025] The above and other features, properties, and advantages of the present invention will become more apparent from the following description in conjunction with the drawings and embodiments, where the same reference numerals in the drawings always denote the same features, among which:

[0026] Figure 1 It is a schematic structural diagram of the engine casing.

[0027] Figure 2 It is a schematic structural diagram of the measuring system for the leakage volume of the engine casing of the present invention.

[0028]

Reference Numerals

[0029] Engine casing 10, 500

[0030] Mounting seat 20

[0031] Front mounting edge of the engine casing 11

[0032] Rear mounting edge of the engine casing 12

[0033] Regulating valve 100

[0034] Flow divider 200

[0035] Simulation chamber 300

[0036] Gas source 400

[0037] Simulation chamber 600

[0038] Thermometer 700

[0039] Pressure gauge 710

[0040] Sealing tool 510

[0041] Adjustable air release port 610

[0042] Flowmeter 620 Detailed Embodiments

[0043] To make the above objects, features, and advantages of the present invention more obvious and understandable, the following detailed description of the specific embodiments of the present invention is provided in conjunction with the drawings.

[0044] Embodiments of the present invention will now be described in detail with reference to the drawings. Preferred embodiments of the present invention will now be described in detail, and examples thereof are shown in the drawings. Whenever possible, the same reference numerals will be used throughout all the drawings to denote the same or similar parts.

[0045] In addition, although the terms used in the present invention are selected from well-known and commonly used terms, some of the terms mentioned in the specification of the present invention may be selected by the applicant according to his or her judgment, and their detailed meanings are described in the relevant parts of the description herein.

[0046] In addition, the present invention is required to be understood not only by the actual terms used, but also by the meanings implied by each term.

[0047] Figure 2 It is a schematic structural diagram of the measurement system for the leakage amount of the engine casing of the present invention.

[0048] Reference Figure 2 to the measurement system, the present invention discloses a method for measuring the leakage amount of an engine casing, which includes the following steps:

[0049] Step S 1 , block the front and rear mounting edges of the engine casing with a blocking tool, and install a thermometer and a pressure gauge on the casing blocking tool and the simulation chamber respectively.

[0050] Step S 2 , connect the gas source, regulating valve, shunt, engine casing, simulation chamber and flowmeter.

[0051] Preferably, in the step S 2 , the engine casing is an engine casing with a blocking tool, and the simulation chamber is a simulation chamber with an adjustable air vent.

[0052] Step S 3 , open the regulating valve, and the air flow is divided into two equal parts through the shunt and enters the engine casing and the simulation chamber respectively.

[0053] Step S 4 , adjust the regulating valve and wait until the gas pressure in the engine casing is constant, and the gas pressure and temperature are constant.

[0054] Preferably, in the step S 4 , obtain the temperature and pressure data through a thermometer and a flowmeter.

[0055] Step S 5 , adjust the size of the air vent on the simulation chamber so that the gas pressure and temperature in the simulation chamber are the same as those in the engine casing, and the displayed value of the flowmeter on the simulation chamber is the gas leakage amount of the engine casing.

[0056] As Figure 2As shown in the figure, the present invention also provides a measurement system for the leakage amount of an engine casing, which adopts the measurement method for the leakage amount of an engine casing as described above. The measurement system includes a regulating valve 100, a diverter 200, and a simulation chamber 300. Among them, the inlet of the regulating valve 100 is connected to a gas source 400, the outlet of the regulating valve 100 is connected to the inlet of the diverter 200, and the outlets of the diverter 200 are respectively connected to the engine casing 500 and the simulation chamber 600 to send air flow into the engine casing 500 and the simulation chamber 300. The engine casing 500 and the simulation chamber 600 are respectively connected with a thermometer 700 and a pressure gauge 710 for measuring temperature and gas pressure.

[0057] Preferably, a plugging tool 510 is installed on the engine casing 500 here.

[0058] In addition, an adjustable air vent 610 is provided on the simulation chamber 600. The adjustable air vent 610 is preferably opened at the lower part of the simulation chamber 600. At the same time, a flow meter 620 can also be installed at the adjustable air vent 610 for measuring the flow rate at the adjustable air vent 610.

[0059] According to the description of the above structure and measurement method, the measurement method and measurement system for the leakage amount of the engine casing of the present invention have the following characteristics:

[0060] First, obtain the leakage amount of the engine casing through an equivalent simulation method;

[0061] Second, simulate the air condition in the engine casing sealing test through the simulation chamber, and the simulation chamber is provided with an adjustable air vent. When the gas pressure and temperature in the simulation chamber are the same as the gas temperature and pressure in the engine casing, it indicates that during the test, the gas leakage amount in the engine casing is the same as the gas leakage amount in the simulation chamber, and the gas leakage amount in the simulation chamber can be obtained through the flow meter;

[0062] Third, during the test, feedback the leakage air flow through the inflation air flow. During the test, when the pressure in the engine casing and the simulation chamber is constant, it indicates that the air flow entering the engine casing (or the simulation chamber) is equal to the leakage air flow;

[0063] Fourth, the plugging tool of the engine casing is in the same installation state as the casing on the engine. Taking the engine casing as an example, the connecting stop of the plug for plugging the front and rear installation edges of the engine casing is equivalent to the installation state of the engine casing on the engine (the front end is equivalent to the installation edge of the front turbine casing, and the rear end is equivalent to the installation edge of the rear turbine casing).

[0064] In summary, the measurement method and measurement system for the leakage amount of the engine casing of the present invention can obtain the leakage amount of the engine casing more accurately and conveniently, and evaluate the impact of the leakage on the working efficiency of the engine.

[0065] To those skilled in the art, the above invention disclosure is merely an example and does not constitute a limitation to this application. Although not explicitly stated here, those skilled in the art may make various modifications, improvements, and corrections to this application. Such modifications, improvements, and corrections are proposed in this application, so such modifications, improvements, and corrections still fall within the spirit and scope of the exemplary embodiments of this application.

[0066] Meanwhile, this application uses specific terms to describe the embodiments of this application. Such as "one embodiment", "an embodiment", and / or "some embodiments" mean a certain feature, structure, or characteristic related to at least one embodiment of this application. Therefore, it should be emphasized and noted that the "one embodiment" or "an embodiment" or "an alternative embodiment" mentioned twice or more at different positions in this specification does not necessarily refer to the same embodiment. In addition, certain features, structures, or characteristics in one or more embodiments of this application can be appropriately combined.

[0067] Similarly, it should be noted that, in order to simplify the expression of the disclosure of this application and thus help the understanding of one or more embodiments of the invention, in the foregoing description of the embodiments of this application, sometimes multiple features are merged into one embodiment, drawing, or description thereof. However, this disclosure method does not mean that the features required by the subject matter of this application are more than those mentioned in the claims. In fact, the features of the embodiments are less than all the features of the individual embodiments disclosed above.

[0068] Although the specific embodiments of the present invention have been described above, those skilled in the art should understand that these are only illustrative examples, and the protection scope of the present invention is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but these changes and modifications all fall within the protection scope of the present invention.

Claims

1. A method for measuring engine casing leakage, characterized in that: The method for measuring the leakage of the engine casing comprises the following steps: S1. Use a plugging tool to plug the front and rear mounting edges of the engine casing, and install a thermometer and a pressure gauge on the casing plugging tool and the simulation cabin respectively; S2, connect the gas source, regulating valve, diverter, engine casing, simulation cabin and flow meter; S3, opening the regulating valve, the airflow is divided into two identical streams through the splitter, and enters the engine casing and the simulation cabin respectively; S4, adjusting the regulating valve and waiting until the gas pressure in the engine casing is constant, and the gas pressure and temperature are constant; S5. Adjust the size of the vent on the simulation cabin so that the gas pressure and temperature in the simulation cabin are consistent with the gas pressure and temperature in the engine casing. The flow meter display value on the simulation cabin is the gas leakage amount of the engine casing.

2. The method for measuring engine casing leakage as claimed in claim 1, characterized in that: The step S4 acquires temperature and pressure data through a thermometer and a flow meter.

3. The method for measuring engine casing leakage as claimed in claim 1, characterized in that: In step S2, the engine casing is an engine casing with a plugging tool, and the simulation cabin is a simulation cabin with an adjustable vent hole.

4. A system for measuring engine casing leakage, characterized in that: The engine casing leakage measurement system adopts the engine casing leakage measurement method according to any one of claims 1 to 3, wherein the measurement system comprises a regulating valve, a diverter and a simulation cabin, wherein the inlet of the regulating valve is connected to an air source, the outlet of the regulating valve is connected to the inlet of the diverter, and the outlet of the diverter is respectively connected to the engine casing and the simulation cabin to deliver airflow into the engine casing and the simulation cabin; The engine casing and the simulation cabin are respectively connected with a thermometer and a pressure gauge for measuring temperature and gas pressure.

5. The engine case leakage measurement system according to claim 4, characterized in that: The engine casing is equipped with a blocking tool.

6. The engine case leakage measurement system according to claim 4, characterized in that: The simulation cabin is provided with an adjustable air vent.

7. The engine case leakage measurement system according to claim 6, characterized in that: The adjustable air vent is opened at the lower part of the simulation cabin.

8. The engine case leakage measurement system according to claim 7, characterized in that: A flow meter is installed at the adjustable air vent.

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