A high-speed high-pressure three-blade roots blower's helical twisted blade impeller

Abstract

The utility model relates to roots blower technical field, concretely is a kind of spiral twisted blade type impeller of high-speed high-pressure three-blade roots blower.The impeller includes impeller main body, and the cylindrical shaft is integrally formed in impeller main body inside, and the cylindrical shaft is equipped with mounting hole and multiple limiting grooves;Three impeller blades are in the outer wall of impeller main body, and the blade is twisted 50 to 70 along the axial direction to form spiral propulsion type airflow channel, and airflow pulsation and noise are reduced.The blade is hollow structure, and rib plate is arranged inside and is connected by welding, and weight is reduced to improve the upper limit of rotational speed.The cavity is set up in one end of blade, and counterweight assembly is configured in cavity, and counterweight assembly includes strip slot, placement slot, counterweight block, strip plate and limiting screw, and dynamic balance optimization is realized by adjusting the quantity and position of counterweight block.Cylindrical shaft outer wall is provided with plugging assembly, and plugging assembly includes annular groove, annular block, sealing cover plate and mounting screw, and it is used to block cavity and facilitate maintenance.

Description

Technical Field

[0001] This utility model relates to the field of Roots blower technology, and in particular to a spiral twisted blade impeller for a high-speed, high-pressure three-lobe Roots blower. Background Technology

[0002] In the current field of wind turbine technology, traditional Roots blower impellers have several problems. First, traditional straight-blade impellers generate sudden, explosive intake impacts during the air intake process, resulting in large airflow pulsations and high noise levels, severely affecting the working environment and stable equipment operation. Second, the impeller's weight is relatively large, limiting its maximum speed and making it difficult to meet the demands of high-speed operation. Furthermore, the dynamic balancing of traditional impellers is complex, making precise counterweight adjustments difficult and affecting the impeller's operational stability. In addition, when conveying corrosive gases, the poor corrosion resistance of traditional impeller materials leads to a shorter service life, increasing equipment maintenance costs and replacement frequency. Therefore, developing a Roots blower impeller that can solve the above problems is of significant practical importance. Utility Model Content

[0003] The purpose of this invention is to address the shortcomings of existing technologies, such as the sudden air intake impact generated by traditional straight-blade impellers during the air intake process, the complexity of dynamic balancing adjustments of traditional impellers, and the difficulty in achieving precise counterweight adjustments. Therefore, this invention proposes a spiral twisted blade impeller for a high-speed, high-pressure three-lobe Roots blower.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A spiral twisted impeller for a high-speed, high-pressure three-lobe Roots blower includes an impeller body. A cylindrical shaft is integrally formed inside the impeller body, with one end extending to one end of the impeller body. An installation hole is formed inside the cylindrical shaft, and multiple limiting grooves are formed on the inner wall of the installation hole. Three impeller blades are integrally formed on the outer wall of the impeller body. The impeller blades are twisted axially by 50° to 70° to form a spiral propulsion airflow channel to reduce airflow pulsation and noise. A cavity is formed at one end of each impeller blade, and a counterweight assembly for adjusting the counterweight is provided on the inner wall of the cavity. The outer wall of the cylindrical shaft is provided with a sealing component for sealing the cavity.

[0005] In one possible design, the counterweight assembly includes a strip groove formed on one side of the inner wall of the cavity, and a plurality of placement slots are formed on one side of the inner wall of the strip groove, and a counterweight block is placed inside the placement slot.

[0006] In one possible design, the inner wall of the strip groove is interference-fitted with a strip plate, the strip plate is used to fix the counterweight, a relief hole II is provided on the top side of the strip plate, the internal thread of the relief hole II passes through a limit screw, and a threaded groove II is provided on the bottom inner wall of the strip groove, the threaded groove II is threadedly connected to the limit screw.

[0007] In one possible design, the sealing assembly includes an annular groove formed on the outer wall of a cylindrical shaft, an annular block rotatably connected to the inner wall of the annular groove, a sealing cover plate fixedly fitted on the outer wall of the annular block, a clearance groove I formed on one side of the sealing cover plate, an installation screw passing through the internal thread of the clearance groove I, and a plurality of threaded grooves I formed at one end of the impeller body, the installation screws being threadedly connected to the threaded grooves I.

[0008] In one possible design, the sealing cover is fixed to one end of the impeller body by the mounting screw to seal the cavity, wherein the sealing cover drives the annular block to rotate within the annular groove to expose the cavity.

[0009] In one possible design, the impeller blades are hollow with internal stiffeners. The stiffeners are welded to the inner wall of the impeller blades to reduce weight and increase the maximum rotational speed.

[0010] In one possible design, the stiffener is a plurality of radially arranged reinforcing ribs distributed along the axial direction of the impeller blades.

[0011] In this application, the impeller body can be quickly installed on the fan by setting the limiting groove and the mounting hole. This application adopts a spiral twisted blade design, in which the impeller blades are twisted axially by 50°~70° to form a spiral propulsion airflow channel, avoiding the sudden air intake impact of traditional straight blade impellers and reducing airflow pulsation and noise.

[0012] This application adopts a lightweight structure, using hollow impeller blades welded with internal stiffeners to reduce the weight of the impeller blades and increase the upper speed limit. At the same time, dynamic balance is optimized by adjusting the counterweight. Specifically, multiple mounting screws are unscrewed, which releases the braking state of the sealing cover. The sealing cover can then be rotated, causing the annular block to rotate inside the annular groove, exposing multiple cavities. The limit screws can then be unscrewed to release the braking state of the strip plate. The counterweight can be changed by adjusting the number and position of the counterweight, making it convenient to use.

[0013] Made of corrosion-resistant materials, the impeller blades and impeller body are made of stainless steel or aluminum alloy, suitable for conveying corrosive gases, extending service life. The optimized combination of spiral twist angle and number of blades (three blades) balances conveying efficiency and noise reduction. The welded lightweight structure breaks through the weight limitations of traditional cast impellers and is suitable for high-speed operation.

[0014] Beneficial effects: This application adopts a spiral twisted blade design, with the impeller blades twisted 50° - 70° axially to form a spiral propulsion airflow channel. Compared with the sudden airflow impact of traditional straight blade impellers, this design effectively reduces airflow pulsation and noise generation, providing a quieter and more stable working environment.

[0015] Employing a lightweight structure, the hollow impeller blades are welded to internal stiffeners, reducing their weight. This structure overcomes the weight limitations of traditional cast impellers, enabling the impeller to adapt to high-speed operating conditions, increasing the upper speed limit, and thus improving the fan's efficiency.

[0016] By creating a cavity at one end of the impeller blades and placing a counterweight assembly within the cavity, dynamic balance optimization is achieved. In practice, simply unscrew the mounting screws to release the braking effect on the sealing cover, rotate the sealing cover to cause the annular block to rotate within the annular groove, exposing the cavity. Then, unscrew the limit screws to release the braking effect on the strip plate, allowing for easy adjustment of the number and position of the counterweight blocks, thereby changing the counterweight. The operation is simple and convenient.

[0017] Made of corrosion-resistant stainless steel or aluminum alloy, it is suitable for conveying corrosive gases. Compared to traditional materials, this material effectively resists corrosion, extends the impeller's service life, and reduces equipment maintenance costs and replacement frequency.

[0018] The optimized combination of spiral twist angle and number of blades (three blades) ensures conveying efficiency while further reducing noise, achieving a balance between conveying efficiency and noise reduction, and improving the overall performance of the product. Attached Figure Description

[0019] Figure 1 A three-dimensional structural schematic diagram of a spiral twisted blade impeller for a high-speed, high-pressure three-lobe roots blower proposed in this utility model; Figure 2 Exploded view of the impeller body and sealing cover plate in the spiral twisted blade impeller of a high-speed, high-pressure three-lobe Roots blower proposed in this utility model; Figure 3 This is an exploded view of the impeller body and strip plate in the spiral twisted blade impeller of a high-speed, high-pressure three-lobe Roots blower proposed in this utility model.

[0020] In the diagram: 1. Impeller body; 2. Mounting hole; 3. Impeller blade; 4. Cylindrical shaft; 5. Limiting groove; 6. Mounting screw; 7. Threaded groove I; 8. Cavity; 9. Annular groove; 10. Sealing cover plate; 11. Annular block; 12. Relief groove I; 13. Placement groove; 14. Strip groove; 15. Threaded groove II; 16. Limiting screw; 17. Relief hole II; 18. Counterweight block; 19. Strip plate. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0022] In one embodiment: Refer to Figure 1-3 An impeller, the specific implementation of which is as follows: The impeller comprises an impeller body 1, which is made of stainless steel, possessing excellent corrosion resistance and suitable for conveying corrosive gases, effectively extending its service life. A cylindrical shaft 4 is integrally formed inside the impeller body 1, with one end extending to the other end of the impeller body 1. The cylindrical shaft 4 has mounting holes 2 inside, and the inner wall of the mounting holes 2 has multiple interconnected limiting grooves 5. During actual installation, the impeller body 1 can be quickly installed onto the corresponding mounting shaft on the fan using the limiting grooves 5 and the mounting holes 2. The limiting grooves 5 cooperate with the protruding structures on the mounting shaft, serving to position and prevent rotation.

[0023] The impeller body 1 has three impeller blades 3 integrally formed on its outer wall. The impeller blades 3 are arranged in an inclined spiral, twisted 50°-70° along the axial direction to form a spiral propulsion airflow channel. The spiral twisted blade design avoids the sudden air intake impact of traditional straight blade impellers, reduces airflow pulsation and noise, and the optimized combination of the spiral twist angle and the three blades balances conveying efficiency and noise reduction.

[0024] A cavity 8 is formed at one end of the impeller blade 3. A counterweight assembly for adjusting the counterweight is provided on the inner wall of the cavity 8. The counterweight assembly includes a strip groove 14 formed on one side of the inner wall of the cavity 8. Multiple interconnected placement slots 13 are formed on one side of the inner wall of the strip groove 14. Counterweight blocks 18 are placed inside the placement slots 13, and the counterweight blocks 18 can be selected according to different weight specifications according to actual needs. A strip plate 19 is interference-fitted onto the inner wall of the strip groove 14. The strip plate 19 is used to abut against the counterweight blocks 18, preventing the counterweight blocks 18 from moving during impeller operation. A clearance hole II 17 is formed on one side of the top of the strip plate 19. A limit screw 16 passes through the threaded part of the clearance hole II 17. A threaded groove II 15 is formed on the inner wall of the bottom of the strip groove 14, and the threaded groove II 15 is threadedly connected to the limit screw 16. When dynamic balancing optimization is required, unscrew the limit screw 16 from the threaded groove II 15 to release the braking state of the strip plate 19. At this time, the strip plate 19 can be moved, and the number of counterweights 18 and their positions in the placement groove 13 can be adjusted as needed to change the counterweight. After the adjustment is completed, re-fit the strip plate 19 with the strip groove 14 and screw the limit screw 16 into the threaded groove II 15 to fix it.

[0025] The outer wall of the cylindrical shaft 4 is provided with a sealing assembly for sealing the cavity 8. The sealing assembly includes an annular groove 9 formed on the outer wall of the cylindrical shaft 4, an annular block 11 rotatably connected to the inner wall of the annular groove 9, and a sealing cover plate 10 fixedly fitted on the outer wall of the annular block 11. The sealing cover plate 10 is made of aluminum alloy to reduce weight while ensuring a certain strength. A relief groove I12 is formed on one side of the sealing cover plate 10, and a mounting screw 6 is threaded through the relief groove I12. Multiple threaded grooves I7 are formed at one end of the impeller body 1, and the mounting screw 6 is threadedly connected to the threaded grooves I7. Under normal conditions, the mounting screw 6 passes through the relief groove I12 and is screwed into the threaded grooves I7, fixing the sealing cover plate 10 to one end of the impeller body 1 and sealing the cavity 8. When the counterweight needs to be adjusted, unscrew the multiple mounting screws 6 from the threaded groove I 7 to release the braking state of the sealing cover 10. At this time, the sealing cover 10 can be rotated, causing the annular block 11 to rotate inside the annular groove 9, exposing the multiple cavities 8 for counterweight adjustment. After adjustment, return the sealing cover 10 to its original position and secure it with the mounting screws 6.

[0026] This application can be used in the field of Roots blowers, or in other fields applicable to this application.

[0027] In another embodiment: Reference Figure 1-3 A spiral twisted blade impeller for a high-speed, high-pressure three-lobe Roots blower is used in the field of Roots blowers. The impeller blade 3 adopts a hollow structure and is connected to the internal stiffeners by welding. This lightweight structure reduces the weight of the impeller blade 3, breaks through the weight limit of traditional cast impellers, increases the upper limit of speed, and is suitable for high-speed working conditions.

[0028] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A spiral twisted blade impeller for a high-speed, high-pressure three-lobe Roots blower, characterized in that, include: The impeller body (1) has a cylindrical shaft (4) integrally formed inside it. One end of the cylindrical shaft (4) extends to one end of the impeller body (1). The cylindrical shaft (4) has a mounting hole (2) inside it. The inner wall of the mounting hole (2) has multiple limiting grooves (5). The outer wall of the impeller body (1) has three impeller blades (3) integrally formed. The impeller blades (3) are twisted 50° to 70° along the axial direction to form a spiral propulsion airflow channel to reduce airflow pulsation and noise. One end of the impeller blades (3) has a cavity (8). The inner wall of the cavity (8) is provided with a counterweight assembly for adjusting the counterweight. The outer wall of the cylindrical shaft (4) is provided with a sealing component for sealing the cavity (8).

2. The helical twisted blade impeller of the high-speed, high-pressure three-lobe roots blower according to claim 1, characterized in that, The counterweight assembly includes a strip groove (14) formed on one side of the inner wall of the cavity (8), and a plurality of placement slots (13) are formed on one side of the inner wall of the strip groove (14), and a counterweight block (18) is placed inside the placement slot (13).

3. The helical twisted blade impeller of the high-speed, high-pressure three-lobe roots blower according to claim 2, characterized in that, The inner wall of the strip groove (14) is interference-fitted with a strip plate (19), which is used to fix the counterweight (18). A clearance hole II (17) is provided on the top side of the strip plate (19), and the internal thread of the clearance hole II (17) passes through a limit screw (16). A threaded groove II (15) is provided on the bottom inner wall of the strip groove (14), and the threaded groove II (15) is threadedly connected to the limit screw (16).

4. The helical twisted blade impeller of the high-speed, high-pressure three-lobe roots blower according to claim 1, characterized in that, The sealing assembly includes an annular groove (9) formed on the outer wall of the cylindrical shaft (4). An annular block (11) is rotatably connected to the inner wall of the annular groove (9). A sealing cover plate (10) is fixedly fitted on the outer wall of the annular block (11). A clearance groove I (12) is formed on one side of the sealing cover plate (10). An installation screw (6) is threaded through the internal thread of the clearance groove I (12). A plurality of threaded grooves I (7) are formed at one end of the impeller body (1). The installation screw (6) is threadedly connected to the threaded grooves I (7).

5. The helical twisted blade impeller of the high-speed, high-pressure three-lobe roots blower according to claim 4, characterized in that, The sealing cover (10) is fixed to one end of the impeller body (1) by the mounting screw (6) to seal the cavity (8), wherein the sealing cover (10) drives the annular block (11) to rotate in the annular groove (9) to expose the cavity (8).

6. The helical twisted blade impeller of the high-speed, high-pressure three-lobe roots blower according to claim 1, characterized in that, The impeller blade (3) is a hollow structure with internal stiffeners, which are welded to the inner wall of the impeller blade (3).

7. The helical twisted blade impeller of the high-speed, high-pressure three-lobe roots blower according to claim 6, characterized in that, The stiffeners are multiple radially arranged reinforcing ribs, which are distributed along the axial direction of the impeller blades (3).

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