A high speed compressor

Abstract

The application discloses a high-speed compressor, which comprises a high-speed compressor support and a protective shell, wherein the high-speed compressor support is fixedly connected with the protective shell, a driving space is formed by the high-speed compressor support and the protective shell, a regulating assembly is arranged on the upper portion of the side surface of the protective shell and penetrates the protective shell and extends into the driving space, and an inlet casing assembly is arranged on the side of the regulating assembly close to the high-speed compressor support. The inlet guide section is an important part of the inlet of the centrifugal compressor, which mainly functions to keep the airflow entering the compressor stable, reduce airflow turbulence, and the diameter of the air inlet pipe is usually large in the traditional design, so that the airflow is prone to turbulence when entering from the atmosphere, which influences the performance of the impeller. In order to avoid this phenomenon, the air inlet pipe is optimized and designed, and the inlet of the inlet casing is designed in a trumpet-shaped expansion mode, so that the airflow is gradually and uniformly expanded after entering.

Description

Technical Field

[0001] This invention relates to the field of compressors, and more particularly to a high-speed compressor. Background Technology

[0002] In the current market, with the increasing demands for energy efficiency, operational stability, and environmental protection in industrial production, the structural optimization of centrifugal compressors will focus on improving performance and reducing energy consumption and noise. On the one hand, with the continuous expansion of industrial scale and the increasing demands on fan performance, further improving the airflow, air pressure, and efficiency of fans through structural optimization to meet the ventilation needs of large-scale industrial projects is an inevitable trend. On the other hand, under the backdrop of environmental protection and energy conservation, optimizing the structure to reduce fan operating energy consumption and minimize environmental impact will help fans gain a competitive edge in the market. Furthermore, different application scenarios have specific requirements for fan structures. For example, special environments such as ships and mines require compact and highly reliable fan structures; therefore, developing structural designs adaptable to various scenarios also has broad prospects.

[0003] A typical centrifugal compressor structure consists of a centrifugal impeller, a volute, an air inlet, and a high-speed drive motor. The aerodynamic efficiency of the compressor is mainly controlled by three factors: the impeller blade profile, the inlet flow pattern, and the clearance between the impeller and the front cover. Regarding these factors, in conventional designs, the centrifugal fan blade profile can already achieve extremely high efficiency, making further improvements very difficult. The centrifugal fan inlet is directly connected to the air inlet, making it impossible to control the inlet flow pattern. The clearance between the impeller and the front cover is affected by the machining level; even a slight reduction in clearance significantly increases the process requirements and greatly increases the difficulty of mass production. Summary of the Invention

[0004] The purpose of this invention is to provide a high-speed compressor to solve the problem of the inability to control the inlet flow state of a centrifugal fan mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A high-speed compressor includes a high-speed compressor bracket and a protective shell. The side of the high-speed compressor bracket is fixedly connected to the protective shell. The high-speed compressor bracket and the side of the protective shell enclose a driving space. A control component is provided through the upper part of the side of the protective shell. The control component partially penetrates the protective shell and extends into the driving space. An inlet casing assembly is provided on the side of the control component near the high-speed compressor bracket. The inlet casing assembly is rotatably connected to the control component and is located in the driving space.

[0007] Preferably, the protective housing includes a high-speed compressor volute, the side of which is connected to the side of the high-speed compressor bracket. An impeller front cover is provided on the side of the high-speed compressor volute away from the high-speed compressor bracket. After the high-speed compressor volute, the impeller front cover, and the high-speed compressor bracket are assembled, they enclose a driving space on the side. An air inlet pipe is provided on the side of the impeller front cover away from the high-speed compressor volute. The upper part of the side wall of the impeller front cover away from the high-speed compressor volute is penetrated by a control component.

[0008] Preferably, the upper surface of the high-speed compressor bracket is provided with a drive assembly, which is partially inserted into the drive space. The drive assembly includes a drive motor and a centrifugal impeller. The drive end of the drive motor is connected to the centrifugal impeller by fastening bolts. The centrifugal impeller is used to drive airflow circulation within the drive space.

[0009] Preferably, the control component includes a nut, which is fixedly connected to the upper part of the side wall of the impeller front cover protection. A screw is fitted on the nut, and the nut and the screw are threadedly connected. The screw passes through the impeller front cover protection and is rotatably connected to the inlet casing assembly.

[0010] Preferably, the side wall of the inlet casing assembly is provided with several sets of limiting rods. One end of each set of limiting rods is fixedly connected to the inlet casing assembly, and the other end passes through the impeller front cover for protection and sliding engagement, so as to limit the rotational displacement of the inlet casing assembly.

[0011] Preferably, the inlet casing assembly includes an inlet casing, which is horn-shaped. The upper part of the side wall of the inlet casing is rotatably connected to a screw. The side wall of the inlet casing is connected to several sets of limiting rods. An inlet guide section is provided inside the inlet casing. The inlet guide section communicates with the air inlet pipe and the drive space. A flow divider is provided inside the inlet guide section. The flow divider is connected to the inlet casing by several sets of inclined baffles. A flow equalization cavity is provided between two adjacent sets of baffles. The flow equalization cavity communicates with the inlet guide section. A flow divider cavity is provided inside the flow divider. The flow divider cavity communicates with the inlet guide section. The inlet guide section of the inlet casing assembly is aligned with the air inlet pipe.

[0012] Preferably, the high-speed compressor volute has an exhaust port on its side, which is connected to the drive space, and the high-speed compressor bracket has a high-speed compressor base on the side away from the protective shell.

[0013] The beneficial effects of this invention are:

[0014] 1. The inlet guide section is an important part of the centrifugal compressor's air inlet. Its main function is to keep the airflow entering the compressor stable and reduce airflow turbulence. In traditional designs, the diameter of the air inlet pipe is usually large, which can easily generate turbulence when the airflow enters from the atmosphere, affecting the impeller performance. To avoid this phenomenon, the present invention optimizes the design of the inlet casing and adopts a flared opening design to ensure that the airflow is gradually and uniformly expanded after entering.

[0015] 2. By setting up baffles, which act as diverters when the airflow enters the front section of the compressor, the rotation of the airflow and the turbulence at the compressor inlet are further reduced. The baffles are set at an angle, which can adjust the airflow distribution according to different operating conditions, ensuring that the intake airflow enters the impeller evenly and reducing the negative impact of airflow deviation on compressor efficiency.

[0016] 3. By setting up a flow uniformization cavity, which is located between the guide section and the impeller inlet, the function is to make the airflow through the inlet more uniform and reduce airflow deviation. Through the design of the flow uniformization cavity, the airflow enters the centrifugal impeller, avoiding eddies and instability caused by uneven airflow, thereby improving the aerodynamic efficiency of the compressor.

[0017] 4. Furthermore, the screw in the regulating component precisely controls the gap between the centrifugal impeller and the impeller front cover protection. This near-seamless coordination means that during compressor operation, airflow can pass more smoothly, reducing airflow leakage and energy loss caused by the gap. This significantly improves the working efficiency and stability of the centrifugal compressor, laying a solid foundation for the reliable operation of the entire equipment. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of an embodiment of the present invention;

[0019] Figure 2 This is a cross-sectional three-dimensional structural diagram of an embodiment of the present invention;

[0020] Figure 3 In this invention Figure 2 Cross-sectional view;

[0021] Figure 4 In this invention Figure 3 Cross-sectional view;

[0022] Figure 5 This is a schematic diagram of the inlet casing assembly in this invention;

[0023] Figure 6 This is the present invention. Figure 5 A diagram of AA in the middle;

[0024] Figure 7 This is a schematic diagram of the centrifugal impeller in this invention;

[0025] Figure 8 This is a line drawing of the inlet casing assembly in an embodiment of the present invention.

[0026] In the diagram: 1. High-speed compressor bracket; 2. Protective shell; 21. High-speed compressor volute; 211. Exhaust port; 22. Impeller front cover protection; 23. Inlet pipe; 3. Drive space; 4. Control assembly; 41. Nut; 42. Screw; 5. Inlet casing assembly; 51. Limiting rod; 52. Inlet casing; 53. Inlet guide section; 54. Flow divider; 55. Baffle plate; 56. Flow divider cavity; 57. Flow equalization cavity; 6. Drive assembly; 61. Drive motor; 62. Centrifugal impeller; 63. Fastening bolts; 7. High-speed compressor base. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] Please see Figures 1-8 This invention provides a high-speed compressor, including a high-speed compressor bracket 1 and a protective shell 2. The side of the high-speed compressor bracket 1 is fixedly connected to the protective shell 2. The side of the high-speed compressor bracket 1 and the protective shell 2 enclose a driving space 3. A regulating component 4 is provided through the upper part of the side of the protective shell 2. The regulating component 4 partially penetrates the protective shell 2 and extends into the driving space 3. An inlet casing assembly 5 is provided on the side of the regulating component 4 near the high-speed compressor bracket 1, and the inlet casing assembly 5 is rotatably connected to the regulating component 4 and located within the driving space 3. By rotating the regulating component 4, the inlet casing assembly 5 is driven to begin regulating and moving, thereby adjusting the distance between the inlet casing assembly 5 and the protective shell 2, achieving control of the capacity of the driving space 3, and diverting gas through the inlet casing assembly 5.

[0029] Specifically, the protective shell 2 includes a high-speed compressor volute 21, the side of which is connected to the side of the high-speed compressor bracket 1. An impeller front cover protection 22 is provided on the side of the high-speed compressor volute 21 away from the high-speed compressor bracket 1. After the high-speed compressor volute 21, the impeller front cover protection 22 and the high-speed compressor bracket 1 are assembled, they enclose a driving space 3 on the side. An air inlet pipe 23 is provided on the side of the impeller front cover protection 22 away from the high-speed compressor volute 21. The upper part of the side wall of the impeller front cover protection 22 away from the high-speed compressor volute 21 is penetrated by the control component 4.

[0030] The impeller front cover protection 22 is made of low-hardness nylon, taking into full account the feasibility and efficiency of the processing. Compared with high-hardness materials, low-hardness materials are easier to cut by high-hardness alloy impellers, which not only reduces wear on the impeller during cutting and extends the service life of the high-hardness alloy impeller, but also ensures higher shape accuracy of the front cover after cutting, meeting the stringent requirements of the overall assembly and operation of the impeller. At the same time, this material characteristic also makes the processing smoother, helps to improve production efficiency and reduce processing costs, showing significant advantages in impeller manufacturing.

[0031] Among them, a sealing ring 2 is provided between the high-speed compressor volute 21 and the high-speed compressor bracket 1 to achieve a sealing effect.

[0032] Specifically, the high-speed compressor bracket 1 has a drive assembly 6 on its upper surface. The drive assembly 6 is partially inserted into the drive space 3. The drive assembly 6 includes a drive motor 61 and a centrifugal impeller 62. The drive end of the drive motor 61 is connected to the centrifugal impeller 62 by a fastening bolt 63. The centrifugal impeller 62 is used for airflow circulation within the drive space 3. When the drive motor 61 in the drive assembly 6 starts, it drives the centrifugal impeller 62 to start rotating at high speed, thereby allowing air to enter the drive space 3 and achieving airflow circulation.

[0033] A sealing ring is provided between the high-speed compressor bracket 1 and the drive motor 61 to achieve a sealing effect.

[0034] The centrifugal impeller 62 is made of a high-hardness alloy, namely 7075 aerospace aluminum alloy. The high-hardness alloy itself has extremely high hardness and wear resistance, which allows the centrifugal impeller to easily overcome the resistance of the front cover material when it is running at high speed and in contact with the front cover, thus achieving precise and efficient cutting. The high-hardness alloy also has good stability and impact resistance, and can maintain the stability of its own structure during operation, without deformation or wear affecting the impeller's dynamic balance due to long-term work.

[0035] Specifically, the control assembly 4 includes a nut 41, which is fixedly connected to the upper side wall of the impeller front cover protection 22. A screw 42 is fitted onto the nut 41, and the nut 41 and screw 42 are threadedly connected. The screw 42 passes through the impeller front cover protection 22 and is rotatably connected to the inlet casing assembly 5. When the screw 42 in the control assembly 4 starts to rotate, due to the threaded connection between the nut 41 and the screw 42, and the rotatable engagement between the screw 42 and the inlet casing assembly 5, the inlet casing assembly 5 is pushed to move and adjust, moving closer to the centrifugal impeller 62, thereby controlling the clearance.

[0036] Specifically, the inlet casing assembly 5 has several sets of limiting rods 51 on its side wall. One end of each limiting rod 51 is fixedly connected to the inlet casing assembly 5, and the other end passes through the impeller front cover protection 22 and is slidably engaged to limit the rotational displacement of the inlet casing assembly 5. Because the limiting rods 51 limit the inlet casing assembly 5, rotational displacement is prevented.

[0037] A sealing ring 3 is provided between the inlet casing assembly 5 and the high-speed compressor volute 21.

[0038] Among them, a sealing ring four is provided between the inlet casing assembly 5 and the impeller front cover protection 22.

[0039] Specifically, the inlet casing assembly 5 includes an inlet casing 52, which is horn-shaped. The upper part of the side wall of the inlet casing 52 is rotatably connected to the screw 42. The side wall of the inlet casing 52 is connected to several sets of limiting rods 51. An inlet guide section 53 is provided inside the inlet casing 52. The inlet guide section 53 is interconnected with the air inlet pipe 23 and the drive space 3. A flow divider 54 is provided inside the inlet guide section 53. The flow divider 54 and the inlet casing 52 are connected by several sets of inclined baffles 55. A flow equalization cavity 57 is provided between two adjacent sets of baffles 55. The flow equalization cavity 57 is interconnected with the inlet guide section 53. A flow divider cavity 56 is provided inside the flow divider 54. The flow divider cavity 56 is interconnected with the inlet guide section 53. The inlet guide section 53 of the inlet casing assembly 5 is aligned with the air inlet pipe 23. When the air enters the inlet guide section 53 of the inlet casing 52 in the inlet casing assembly 5 through the air inlet pipe 23, part of the air will enter through the splitting cavity 56, and the other part will enter the drive space 3 through the flow equalization cavity 57.

[0040] Specifically, the high-speed compressor volute 21 has an exhaust port 211 on its side, which is connected to the drive space 3. The high-speed compressor support 1 has a high-speed compressor base 7 on its side away from the protective shell 2.

[0041] Working principle of this invention:

[0042] In the control mode, the user starts to rotate the screw 42 in the control component 4. Since the nut 41 is threadedly connected to the screw 42, and the screw 42 is rotated in conjunction with the inlet casing assembly 5, and the limit rod 51 limits the inlet casing assembly 5, rotational deviation is prevented. This, in turn, pushes the inlet casing assembly 5 to move and adjust, bringing it closer to the centrifugal impeller 62, thus controlling the clearance. This means that during compressor operation, the airflow can pass through more smoothly.

[0043] In operation, the drive motor 61 in the drive assembly 6 is started, which drives the centrifugal impeller 62 to start rotating at high speed. When the air enters the inlet guide section 53 from the air inlet pipe 23, part of the air will enter through the diversion chamber 56, and the other part will enter the drive space 3 through the flow equalization chamber 57, thereby achieving the effect of diverting the air, and then being discharged from the exhaust port 211.

[0044] Based on the above embodiments

[0045] By optimizing the intake airflow through the inlet casing assembly, centrifugal compressors experience significant improvements, with a mature and readily implementable process. Technically, this enhances airflow stability, reduces pressure fluctuations and losses caused by inlet flow turbulence, and improves aerodynamic efficiency; it also reduces intake energy loss, particularly optimizing airflow resistance under high flow rate and high compression ratio conditions, thus increasing overall efficiency; it expands the stable operating range, allowing the compressor to operate stably across a wide flow range, especially at low flow rate, low pressure, and low load, avoiding uneven airflow or surge; and it reduces eddies and noise through a smooth and uniform streamline design. In terms of manufacturing and implementation, precision CNC machining ensures accurate component dimensions and smooth fit, allowing for assembly and adjustment via automated assembly lines. Furthermore, numerical simulations can be used to optimize flow channels and guide devices for different application scenarios. Overall, the optimized inlet casing design effectively improves the aerodynamic performance, stability, and efficiency of centrifugal compressors, reducing energy loss and noise, and providing a more reliable and efficient solution for industrial applications.

[0046] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions or improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A high-speed compressor, comprising a high-speed compressor bracket (1) and a protective shell (2), characterized in that: The side of the high-speed compressor bracket (1) is fixedly connected to the protective shell (2), and the side of the high-speed compressor bracket (1) and the protective shell (2) enclose the driving space (3). The upper side of the protective shell (2) is provided with a control component (4), which partially penetrates the protective shell (2) and extends into the drive space (3); The control component (4) has an inlet casing component (5) on the side near the high-speed compressor bracket (1), and the inlet casing component (5) is rotatably connected to the control component (4) and located in the drive space (3); The protective shell (2) includes a high-speed compressor volute (21). The side of the high-speed compressor volute (21) is connected to the side of the high-speed compressor bracket (1). The side of the high-speed compressor volute (21) away from the high-speed compressor bracket (1) is provided with an impeller front cover protection (22). After the high-speed compressor volute (21), the impeller front cover protection (22) and the high-speed compressor bracket (1) are assembled, they enclose a driving space (3) on the side. The upper part of the side wall of the impeller front cover protection (22) away from the high-speed compressor volute (21) is penetrated by the control component (4). The control component (4) includes a nut (41), which is fixedly connected to the upper side wall of the impeller front cover protection (22). A screw (42) is sleeved on the nut (41), and the nut (41) and the screw (42) are threadedly connected. The screw (42) passes through the impeller front cover protection (22) and is rotatably connected to the inlet casing assembly (5).

2. A high-speed compressor according to claim 1, characterized in that: The inlet casing assembly (5) has several sets of limiting rods (51) on its side wall. One end of each set of limiting rods (51) is fixedly connected to the inlet casing assembly (5), and the other end passes through the impeller front cover protection (22) and slides to restrict the rotational offset of the inlet casing assembly (5).

3. A high-speed compressor according to claim 2, characterized in that: The inlet casing assembly (5) includes an inlet casing (52), which is horn-shaped and has its sidewalls connected to several sets of limiting rods (51).

4. A high-speed compressor according to claim 3, characterized in that: The upper part of the side wall of the inlet casing (52) is rotatably connected to the screw (42).

5. A high-speed compressor according to claim 3, characterized in that: The inlet casing (52) is provided with an inlet guide section (53), which is connected to the air inlet pipe (23) and the drive space (3) respectively.

6. A high-speed compressor according to claim 5, characterized in that: The inlet guide section (53) is provided with a flow divider (54), and the flow divider (54) and the inlet casing (52) are connected by several sets of inclined baffles (55). A flow homogenization cavity (57) is provided between two adjacent sets of baffles (55), and the flow homogenization cavity (57) is connected to the inlet guide section (53).

7. A high-speed compressor according to claim 6, characterized in that: The diversion frame (54) is provided with a diversion cavity (56), which is connected to the inlet guide section (53). The inlet guide section (53) of the inlet casing assembly (5) is aligned with the air inlet pipe (23).

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