Air inlet pressure stabilizing box of compressor tester for large flow demand

Abstract

The application provides a large-flow-demand-oriented inlet pressure stabilizing box of a compressor tester, which comprises an inlet diffuser section and a rectifier section, the length of the inlet diffuser section is proportional to the diameter of the inlet end of the inlet diffuser section at a ratio of (1.05-1.1):1, so as to reduce the sudden expansion of the front end face of the stabilizing box and reduce the non-uniformity of the flow field, the inner diameter of the rectifier section is (3.0-3.2) meters, and the total length of the stabilizing box is proportional to the diameter of the rectifier section at a ratio of (1.8-2):1, so as to meet the requirement that the internal airflow speed is less than 20 m / s under the maximum air flow of 160 kg / s; the rectifier section of the stabilizing box is provided with a rectifier device, and the rectifier device comprises a rectifier honeycomb and a rectifier net. The stabilizing box of the application can eliminate the sudden expansion problem of airflow in the stabilizing box, reduce the airflow speed in the stabilizing box, realize the stable and uniform inlet rectification effect of large-flow, high-stability and high-uniformity airflow, has the characteristics of simple structure and process, high strength and convenient maintenance, and avoids the problems of structure damage such as tearing during surging.

Description

Technical Field

[0001] The present application belongs to the field of compressor testing, and in particular relates to an air intake pressure stabilizing box for a compressor tester with large flow requirements. Background Art

[0002] The stability and uniformity of the inlet flow field have a significant impact on compressor performance. Therefore, in compressor tests, a pressure surge tank is usually used to obtain stable and uniform intake conditions. However, with the development of compressor technology, the compressor flow rate continues to increase and the intake quality requirements continue to increase.

[0003] Currently, the pressure regulator tank used in compressor testing is usually circular in shape, with a rectifier installed inside the tank to achieve the rectification function. The rectifier is mostly composed of honeycombs or rectifier mesh. However, when faced with the requirement for stable and uniform air intake at the compressor inlet under high intake flow conditions, the existing compressor pressure regulator tank has the following shortcomings:

[0004] 1) There is a lack of a design solution for the external shape of the pressurizer box that meets actual engineering needs. If part of the airflow suddenly expands inside the pressurizer box, the airflow will generate large vortices, which will affect the test performance of the compressor.

[0005] 2) There is a lack of design methods for rectifier layouts that meet requirements for high flow, high stability, and high uniformity. The rectifier layout, consisting of rectifier mesh and honeycomb, has a significant impact on the compressor inlet flow field.

[0006] 3) There is a lack of structural and process design solutions for the rectifier device, and the overall structural solution does not clearly define a design method for low total pressure loss, high structural strength, and high maintainability.

[0007] Therefore, a compressor tester intake pressure stabilizing box for large flow requirements is needed to achieve the goal of stable and uniform compressor inlet flow field under large intake flow conditions. Summary of the Invention

[0008] The purpose of the present application is to provide an air intake surge tank for a compressor tester with large flow requirements, so as to solve or alleviate at least one problem in the background technology.

[0009] The technical solution of the present application is: an air inlet pressure regulator box for a compressor tester meeting high flow requirements, the pressure regulator box comprising an inlet diffuser section and a straightening section, the length of the inlet diffuser section to the diameter of the inlet diffuser section inlet end having a ratio of (1.05-1.1):1, thereby reducing the sudden expansion of the front end surface of the pressure regulator box and reducing the non-uniformity of the flow field; the inner diameter of the straightening section having an inner diameter of (3.0-3.2) meters, and the total length of the pressure regulator box to the diameter of the straightening section having a ratio of (1.8-2):1, thereby ensuring an internal airflow velocity of less than 20 m / s at a maximum air flow of 160 kg / s;

[0010] A rectifier is provided in the rectifier section of the voltage stabilizing box, and the rectifier comprises a rectifier honeycomb and a rectifier net.

[0011] In a preferred embodiment of the present application, the rectifying device includes one rectifying honeycomb and two rectifying nets, one rectifying honeycomb is located at the front position in the rectifying section, and the two rectifying nets are arranged at the rear side of the rectifying honeycomb.

[0012] In a preferred embodiment of the present application, the ratio of the distance between the rectifying honeycomb and the front end of the rectifying section to the diameter of the rectifying section is (0.15-0.2):1, the ratio of the distance between the rectifying honeycomb and the first rectifying net and the diameter of the rectifying section is (0.7-0.8):1, the ratio of the distance between the first rectifying net and the second rectifying net and the diameter of the rectifying section is (0.2-0.3):1, and the ratio of the distance between the second rectifying net and the outlet of the rectifying section and the diameter of the rectifying section is (0.8-0.9):1.

[0013] In a preferred embodiment of the present application, the rectifying honeycomb is formed by stamping and stacking multiple layers of metal steel plates with a thickness of (0.15 to 0.16) mm to form a hexagonal structure. The height of a single honeycomb in the rectifying honeycomb is (15 to 16) mm and the length is (180 to 200) mm. The blockage ratio of the honeycomb is not greater than 5%.

[0014] In a preferred embodiment of the present application, the rectifying mesh includes a fine mesh and a coarse mesh, and a layer of fine mesh of metal steel material is sandwiched between two layers of coarse mesh of metal steel material to form a separated rectifying mesh. The four sides of the rectifying mesh are fixed to a support frame composed of crisscrossing steel pipes by welding, and the support frame is fixed to the inner wall of the rectifying section through connecting parts to avoid being torn when the airflow fluctuates.

[0015] In a preferred embodiment of the present application, the metal steel plates in the rectifying honeycomb and / or the rectifying mesh are stainless steel plates.

[0016] The compressor tester inlet pressure stabilizing box provided in this application for large flow requirements has the following advantages:

[0017] 1) The overall shape of the pressure stabilizing box of the present application can eliminate the problem of sudden expansion of airflow within the pressure stabilizing box and reduce the airflow velocity within the pressure stabilizing box;

[0018] 2) The layout of the rectifier device in the voltage stabilizing box of the present application can achieve a stable and uniform intake rectification effect with large flow, high stability, and high uniformity of airflow;

[0019] 3) The structural and process design scheme of the rectifier device in this application has the characteristics of simple structure and process, high strength, and easy maintenance, avoiding structural damage such as tearing during surge. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] 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.

[0021] Figure 1 This is a schematic diagram of the overall structure of the air intake pressure stabilizing box of this application.

[0022] Figure 2 This is a schematic diagram of the internal rectifier section in the voltage regulator box of this application.

[0023] Figure 3 This is a schematic diagram of the rectifier honeycomb structure of this application.

[0024] Figure 4 This is a schematic diagram of the rectifier network structure of this application. DETAILED DESCRIPTION

[0025] 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.

[0026] like Figure 1 As shown, the compressor tester inlet pressure regulating box provided in the present application adopts a jujube-shaped design, which includes an inlet diffuser section 11 and a straightening section 12. The ratio of the length of the inlet diffuser section 11 to the inlet end diameter is approximately (1.05~1.1):1, so as to reduce the sudden expansion of the front end surface of the pressure regulating box and reduce the unevenness of the flow field. The inner diameter of the straightening section 12 is approximately (3.0~3.2) meters, and the ratio of the total length of the pressure regulating box to the diameter of the straightening section is approximately (1.8~2):1, ensuring that the internal air flow velocity is less than 20m / s at a maximum air flow rate of 160kg / s.

[0027] The rectifying section 12 of the voltage stabilizer is provided with a rectifying device, which includes a rectifying honeycomb 13 and a rectifying net 14. In the preferred embodiment of the present application, the rectifying device includes a rectifying honeycomb 13 and two rectifying nets 14. The positional relationship between the three is as follows: Figure 2 As shown, the rectifying honeycomb 13 is located at the front position in the rectifying section 12, and two rectifying nets 14 are set on the rear side. Among them, the ratio of the distance L1 between the rectifying honeycomb 13 and the front end of the rectifying section 12 to the diameter of the rectifying section 12 is approximately (0.15-0.2):1, the ratio of the distance L2 between the rectifying honeycomb 13 and the first rectifying net to the diameter of the rectifying section 12 is approximately (0.7-0.8):1, the ratio of the distance L3 between the first rectifying net and the second rectifying net to the diameter of the rectifying section 12 is approximately (0.2-0.3):1, and the ratio of the distance L4 between the second rectifying net and the outlet of the rectifying section 12 to the diameter of the rectifying section 12 is approximately (0.8-0.9):1. The rectifying device layout scheme of the present application can straighten the airflow, break up the larger vortices in the airflow, and achieve uniform flow of the airflow.

[0028] like Figure 3 As shown, the rectifying honeycomb 13 of the present application is formed by stamping and stacking multiple layers of stainless steel plates with a thickness of approximately (0.15-0.16) mm to form a hexagonal structure. The height of each cell in the rectifying honeycomb 13 is approximately (15-16) mm, the length is approximately (180-200) mm, and the cell blockage ratio is no more than 5%. The rectifying honeycomb structure provided by the present application is simple to manufacture, achieving a rectifying effect while reducing the flow resistance loss of the cells.

[0029] like Figure 4 As shown, the rectifier mesh 14 in this application adopts a split structure and can be replaced separately if damaged. It is mainly composed of a fine mesh 141 and a coarse mesh 142. The rectifier mesh 14 is formed by sandwiching a layer of fine stainless steel mesh 141 between two layers of coarse stainless steel mesh 142. The rectifier mesh 14 is silver brazed around a support frame 15 composed of crisscrossing steel pipes. The support frame 15 is fixed to the inner wall of the rectifier section 12 with screws to prevent tearing during airflow fluctuations.

[0030] The compressor tester inlet pressure stabilizing box provided in this application for large flow requirements has the following advantages:

[0031] 1) The overall shape of the pressure stabilizing box of the present application can eliminate the problem of sudden expansion of airflow within the pressure stabilizing box and reduce the airflow velocity within the pressure stabilizing box;

[0032] 2) The layout of the rectifier device in the voltage stabilizing box of the present application can achieve a stable and uniform intake rectification effect with large flow, high stability, and high uniformity of airflow;

[0033] 3) The structural and process design scheme of the rectifier device in this application has the characteristics of simple structure and process, high strength, and easy maintenance, avoiding structural damage such as tearing during surge.

[0034] 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 compressor tester air intake pressure stabilizing box for large flow requirements, characterized by: The pressure stabilizing tank includes an inlet diffuser section and a rectifying section. The ratio of the length of the inlet diffuser section to the diameter of the inlet diffuser section is (1.05-1.1):1, thereby reducing the sudden expansion of the front end surface of the pressure stabilizing tank and reducing the unevenness of the flow field. The inner diameter of the rectifying section is 3.0 meters to 3.2 meters, and the ratio of the total length of the pressure stabilizing tank to the diameter of the rectifying section is (1.8-2):1, thereby ensuring that the internal airflow velocity is less than 20 m / s at a maximum air flow rate of 160 kg / s. A rectifying device is provided in the rectifying section of the voltage stabilizer box, and the rectifying device includes a rectifying honeycomb and a rectifying net, wherein the rectifying device includes one rectifying honeycomb and two rectifying nets, one rectifying honeycomb is located at the front position in the rectifying section, and the two rectifying nets are arranged on the rear side of the rectifying honeycomb, the ratio of the distance between the rectifying honeycomb and the front end of the rectifying section to the diameter of the rectifying section is (0.15~0.2):1, the ratio of the distance between the rectifying honeycomb and the first rectifying net to the diameter of the rectifying section is (0.7~0.8):1, the ratio of the distance between the first rectifying net and the second rectifying net to the diameter of the rectifying section is (0.2~0.3):1, and the ratio of the distance between the second rectifying net and the outlet of the rectifying section to the diameter of the rectifying section is (0.8~0.9):

1.

2. The air intake pressure stabilizing box for a compressor tester with large flow requirements as claimed in claim 1, characterized in that: The rectifying honeycomb is formed by stamping and stacking multiple layers of metal steel plates with a thickness of 0.15mm to 0.16mm to form a hexagonal structure. The height of a single honeycomb in the rectifying honeycomb is 15mm to 16mm, the length is 180mm to 200mm, and the blockage ratio of the honeycomb is no more than 5%.

3. The compressor tester air intake pressure stabilizing box for large flow requirements as claimed in claim 1, characterized in that: The rectifier mesh includes a fine mesh and a coarse mesh. A layer of fine mesh of metal steel material is sandwiched between two layers of coarse mesh of metal steel material to form a separated rectifier mesh. The four sides of the rectifier mesh are fixed to a support frame composed of crisscross steel pipes by welding. The support frame is fixed to the inner wall of the rectifier section through a connecting piece to avoid being torn when the airflow fluctuates.

4. The air intake pressure stabilizing box for a compressor tester with large flow requirements as claimed in claim 2 or 3, characterized in that: The metal steel plates in the rectifying honeycomb and / or the rectifying net are stainless steel plates.

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