Gas compressor with sealing structure

Abstract

The invention provides a gas compressor with a sealing structure, the gas compressor comprises a rotor, a stator, a gas entraining cavity and at least one pressure regulating cavity, the gas entraining cavity is located between the rotor and the stator, entrained gas in an inner cavity of the rotor enters the gas entraining cavity through a first channel, and the pressure regulating cavity is arranged at the side part of the gas entraining cavity; a first static pressure measuring point is arranged in the air entraining cavity and is used for monitoring cavity pressure; a second static pressure measuring point is arranged in the pressure regulating cavity and used for monitoring the pressure in the pressure regulating cavity, and air is supplied into the pressure regulating cavity according to the pressure difference between the pressure regulating cavity and the air entraining cavity, so that the pressure of the pressure regulating cavity is consistent with that of the air entraining cavity. The pressure adjusting cavities with adjustable pressure are formed in the two sides of the air entraining cavity, and the pressure of the pressure adjusting cavities and the pressure of the air entraining cavity are kept consistent, so that air leakage of the air entraining cavity is avoided; the flow is ensured to be consistent at the measuring end and the leading-in end, and the measuring accuracy is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of aero-engines, in particular to a compressor with a sealing structure to ensure accurate measurement of bleed air flow in compressor test. BACKGROUND

[0002] In the field of aero-engines, with the improvement of the performance of modern aero-engines, the working temperature of the turbine is also getting higher and higher, and in order to improve the service life of the turbine, compressor bleed cooling is a common means.

[0003] However, the compressor bleed air will affect the performance of the compressor. Therefore, in the compressor performance test, the bleed test is usually carried out to investigate the influence of different bleed air on the performance of the compressor.

[0004] The compressor bleed air is divided into two parts: the casing bleed air and the rotor inner cavity bleed air. The casing bleed air can accurately measure the flow rate of the bleed air because there is no leakage in the bleed air path.

[0005] For the rotor inner cavity bleed air, there is a rotor-stator interface in the bleed air path, so there is bleed air leakage, which leads to the measured flow rate not consistent with the actual flow rate from the compressor, and the influence of the bleed air flow rate on the performance of the compressor cannot be accurately judged.

[0006] Based on this problem, the present application designs a compressor with a sealing structure to overcome the above technical problems. SUMMARY

[0007] The technical problem to be solved by the present application is to overcome the defects in the prior art that the rotor inner cavity bleed flow rate of the compressor cannot be accurately measured, and the influence of the bleed air quantity on the performance of the compressor cannot be accurately evaluated, and to provide a sealing structure to ensure the bleed flow rate in the compressor test.

[0008] The present application solves the above technical problems by the following technical scheme:

[0009] A compressor with a sealing structure, characterized in that the sealing structure comprises a rotor, a stator, a bleed air cavity and at least one pressure regulating cavity, the bleed air cavity is located between the rotor and the stator, the rotor inner cavity bleed air enters the bleed air cavity through a first channel, and the pressure regulating cavity is arranged on the side of the bleed air cavity.

[0010] A first static pressure measuring point is arranged in the bleed air cavity for monitoring the cavity pressure; a second static pressure measuring point is arranged in the pressure regulating cavity for monitoring the pressure in the pressure regulating cavity, and according to the pressure difference between the pressure regulating cavity and the bleed air cavity, the gas is supplied into the pressure regulating cavity to make the pressure of the pressure regulating cavity and the bleed air cavity consistent.

[0011] According to one embodiment of the present application, the sealing structure comprises two pressure regulating cavities arranged on both sides of the bleed air cavity.

[0012] According to one embodiment of the present application, the outlet of the bleed air cavity is provided with a flow measuring point for measuring the bleed air flow.

[0013] According to one embodiment of the present application, a sealing structure is arranged between the rotor and the stator.

[0014] According to one embodiment of the present application, the stator is composed of multiple layers of sealing rings.

[0015] According to one embodiment of the present application, the bleed air cavity is formed by two sealing rings arranged outside the rotor bleed air cavity.

[0016] According to one embodiment of the present application, the pressure regulating cavity is formed by one sealing ring arranged on each side of the bleed air cavity.

[0017] According to one embodiment of the present application, the compressor further comprises an exhaust cavity arranged on the side of the pressure regulating cavity.

[0018] According to one embodiment of the present application, the exhaust cavity is formed by one sealing ring arranged outside the pressure regulating cavity.

[0019] According to one embodiment of the present application, the pressure regulating cavity is supplied with gas by a test bench to keep the pressure of the pressure regulating cavity consistent with that of the bleed air cavity.

[0020] The positive progress effect of the present application is that:

[0021] The compressor with the sealing structure has the following advantages:

[0022] I. The pressure regulating cavities with adjustable pressure are arranged on both sides of the bleed air cavity to keep the pressure of the pressure regulating cavities consistent with that of the bleed air cavity to avoid gas leakage of the bleed air cavity.

[0023] II. The consistency of the flow at the measuring end and the introduction end is ensured, and the accuracy of the measurement is improved.

[0024] III. The measured flow is consistent with the actual flow drawn from the compressor, so that the influence of the bleed air flow on the performance of the compressor can be accurately judged.

[0025] IV. The present application provides strong support for the research on the influence of the bleed air on the performance of the compressor. BRIEF DESCRIPTION OF DRAWINGS

[0026] The above and other features, properties and advantages of the present application will become more apparent from the following description of the application, taken in conjunction with the accompanying drawings, in which like reference numerals refer to like features throughout the drawings, and in which:

[0027] Figure 1 This is a schematic diagram of the sealing structure of the compressor cavity in the compressor with sealing structure of the present invention.

[0028] [Attached image labels]

[0029] Rotor 10

[0030] Jingzi 20

[0031] 30 air chambers

[0032] Pressure regulating chamber 40

[0033] First Channel 11

[0034] First static pressure measuring point 31

[0035] Second static pressure measuring point 41

[0036] Flow measurement point 32

[0037] Sealing structure 50

[0038] Exhaust chamber 60

[0039] Air intake channel 12 Detailed Implementation

[0040] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0041] Embodiments of the invention will now be described in detail with reference to the accompanying drawings. Preferred embodiments of the invention will now be described in detail, examples of which are shown in the drawings. Wherever possible, the same reference numerals will be used in all the drawings to denote the same or similar parts.

[0042] Furthermore, although the terminology used in this invention is selected from commonly known and used terms, some terms mentioned in this specification may have been selected by the applicant in his or her judgment, and their detailed meanings are explained in the relevant sections of the description herein.

[0043] Furthermore, the invention should be understood not only through the actual terminology used, but also through the meaning implied by each term.

[0044] Figure 1 This is a schematic diagram of the sealing structure of the compressor cavity in the compressor with sealing structure of the present invention.

[0045] like Figure 1As shown, the present application discloses a compressor with sealing structure, which comprises a rotor 10, a stator 20, an air induction cavity 30 and at least one pressure regulating cavity 40. The air induction cavity 30 is located between the rotor 10 and the stator 20, and the inner cavity of the rotor 10 induces air to enter the air induction cavity 30 through a first channel 11, and the pressure regulating cavity 40 is arranged on the side of the air induction cavity 30.

[0046] A first static pressure measuring point 31 is arranged in the air induction cavity 30 for monitoring the cavity pressure, and a second static pressure measuring point 41 is arranged in the pressure regulating cavity 40 for monitoring the pressure in the pressure regulating cavity 40. According to the pressure difference between the pressure regulating cavity 40 and the air induction cavity 30, air is supplied into the pressure regulating cavity 40 to make the pressure in the pressure regulating cavity 40 consistent with that in the air induction cavity 30, so as to avoid the gas leakage of the air induction cavity 30 and improve the measurement accuracy of the air induction flow.

[0047] Preferably, the compressor comprises two pressure regulating cavities 40, and the pressure regulating cavities 40 are arranged on both sides of the air induction cavity 30. A flow measuring point 32 is arranged at the outlet of the air induction cavity 30 for measuring the air induction flow.

[0048] A sealing structure 50 is arranged between the rotor 10 and the stator 20. The stator 20 is preferably composed of multiple sealing rings.

[0049] In the embodiment, the air induction cavity 30 can be preferably formed by arranging two sealing rings outside the rotor air induction cavity. A first static pressure measuring point 31 is arranged in the air induction cavity 30 for monitoring the cavity pressure, and a flow measuring point 32 (such as a flow meter) is arranged for measuring the air induction flow.

[0050] The pressure regulating cavity 40 can be preferably formed by arranging one sealing ring on each side of the air induction cavity 30. A second static pressure measuring point 41 is arranged in the two cavities for monitoring the cavity pressure of the pressure regulating cavity 40.

[0051] Further, the compressor further comprises an exhaust cavity 60, and the exhaust cavity 60 is arranged on the side of the pressure regulating cavity 40. If there are other air induction channels 12 in the inner cavity, an exhaust cavity 60 is additionally arranged on one side of the pressure regulating cavity 40 to reduce the influence on other air induction channels.

[0052] In the embodiment, the exhaust cavity 60 can be preferably formed by arranging one sealing ring outside the pressure regulating cavity. The pressure regulating cavity 40 is supplied with gas by a test bench to keep the pressure of the pressure regulating cavity 40 consistent with that of the air induction cavity 30. The exhaust cavity 60 can effectively reduce the influence on other air induction channels.

[0053] According to the pressure difference between the air induction cavity 30 and the pressure regulating cavity 40, gas is supplied into the two pressure regulating cavities 40 by a test bench to adjust the cavity pressure and keep the pressure of the pressure regulating cavity 40 consistent with that of the air induction cavity 30, so as to avoid the gas leakage of the air induction cavity 30.

[0054] The structure is provided with pressure-adjustable pressure regulating cavities on both sides of the bleed air cavity, the pressure regulating cavities are kept consistent with the pressure of the bleed air cavity, so that the gas leakage of the bleed air cavity is avoided, the flow at the measurement end is consistent with the flow at the introduction end, the measurement accuracy is improved, the problem that the measured flow is not consistent with the actual flow from the compressor is solved, and the influence of the bleed air flow on the performance of the compressor cannot be accurately judged.

[0055] In summary, the air compressor with the sealing structure has the following advantages:

[0056] I. The pressure-adjustable pressure regulating cavities are arranged on both sides of the bleed air cavity, the pressure regulating cavities are kept consistent with the pressure of the bleed air cavity, so that the gas leakage of the bleed air cavity is avoided;

[0057] II. The flow at the measurement end is consistent with the flow at the introduction end, and the measurement accuracy is improved;

[0058] III. The measured flow is consistent with the actual flow from the compressor, so that the influence of the bleed air flow on the performance of the compressor can be accurately judged;

[0059] IV. The application provides strong support for the research on the influence of the bleed air on the performance of the compressor.

[0060] For those skilled in the art, the above-mentioned disclosure is only as an example, and does not constitute a limitation on the present application. Although it is not explicitly stated here, those skilled in the art can make various modifications, improvements and corrections to the present application.

[0061] Such modifications, improvements and corrections are suggested in the present application, so such modifications, improvements and corrections still belong to the spirit and scope of the exemplary embodiments of the present application.

[0062] At the same time, specific words are used in the present application to describe the embodiments of the present application. For example, "one embodiment", "an embodiment", and / or "some embodiments" means that a certain feature, structure or characteristic related to at least one embodiment of the present application.

[0063] Therefore, it should be emphasized and noted that "an embodiment" or "one embodiment" or "an alternative embodiment" mentioned in the specification twice or more in different positions does not necessarily refer to the same embodiment. In addition, some features, structures or characteristics in one or more embodiments of the present application can be properly combined.

[0064] For simplicity and to facilitate understanding of one or more embodiments of the application, a number of features of the application are sometimes grouped together in a single embodiment, figure or description of an embodiment. This method of disclosure, however, is not to be interpreted as limiting of the scope of the application to the features described in connection with these embodiments. Indeed, the applicant regards his application as having a wide applicability and the scope of his application only being limited by the claims.

[0065] Although the foregoing application has been described in some detail for purposes of clarity and example, it will be apparent to those skilled in the art that various changes and modifications can be made without departing from the principles and scope of the application.

Claims

1. A compressor having a seal structure, characterized by, The sealing structure comprises a rotor, a stator, a bleed air cavity and at least one pressure regulating cavity, the bleed air cavity is located between the rotor and the stator, the bleed air cavity is entered by the bleed air in the rotor cavity through a first channel, and the pressure regulating cavity is arranged on the side of the bleed air cavity; A first static pressure measuring point is arranged in the bleed air cavity for monitoring the cavity pressure; a second static pressure measuring point is arranged in the pressure regulating cavity for monitoring the pressure in the pressure regulating cavity, and according to the pressure difference between the pressure regulating cavity and the bleed air cavity, the gas is supplied into the pressure regulating cavity to make the pressure of the pressure regulating cavity and the bleed air cavity consistent.

2. The compressor with a seal structure according to claim 1, characterized in that, The compressor comprises two pressure regulating cavities, and the pressure regulating cavities are arranged on the two sides of the bleed air cavity.

3. The compressor with a seal structure according to claim 1, characterized in that, An outlet of the bleed air cavity is provided with a flow measuring point for measuring the bleed air flow.

4. The compressor with a seal structure according to claim 1, wherein A sealing structure is arranged between the rotor and the stator.

5. The compressor with a seal structure according to claim 1, wherein The stator is composed of multiple sealing rings.

6. The compressor with a seal structure according to claim 5, characterized in that, The bleed air cavity is formed by two sealing rings arranged outside the rotor bleed air cavity.

7. The shrouded compressor of claim 6, wherein, The pressure regulating cavity is formed by one sealing ring arranged on each side of the bleed air cavity.

8. The compressor with a seal structure according to claim 7, characterized in that, The compressor further comprises an exhaust cavity, and the exhaust cavity is arranged on the side of the pressure regulating cavity.

9. The shrouded compressor of claim 8, wherein, The exhaust cavity is formed by one sealing ring arranged outside the pressure regulating cavity.

10. The shrouded compressor of any one of claims 1-9, wherein, The pressure regulating cavity is supplied with gas by a test bench to keep the pressure of the pressure regulating cavity consistent with that of the bleed air cavity.

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