High-fluidity closed impeller

Abstract

The utility model discloses a high-fluidity closed impeller, which relates to the technical field of impellers and comprises a first cover plate and a second cover plate. Main blades and auxiliary blades which are distributed in a radial mode are installed between the first cover plate and the second cover plate, the main blades and the auxiliary blades are distributed between the first cover plate and the second cover plate in a staggered mode, and the main blades and the auxiliary blades are each of an arc-shaped structure. The widths of the ends, close to the center of the first cover plate, of the main blades and the auxiliary blades are smaller than those of the ends away from the center of the first cover plate; and clamping blocks are fixedly connected to the tops and the bottoms of the main blades. According to the high-fluidity closed impeller, local contraction is formed at the tail end of the flow channel through the auxiliary blades distributed in a staggered mode, the pressure loss phenomenon caused by flow channel expansion is restrained by compressing the flowing space, and therefore pressure loss is reduced, fluid is forced to be attached to the surfaces of the blades again in the high-speed flowing process, and part of kinetic energy is converted into static pressure energy; and secondary pressurization is realized.

Description

Technical Field

[0001] This utility model relates to the field of impeller technology, specifically a high-flow-rate, sealed impeller. Background Technology

[0002] Hermetically sealed impellers are core components of centrifugal pumps, compressors, and other rotating machinery. Their structural design features efficient energy conversion and fluid control, and they are widely used in clean fluid transportation scenarios.

[0003] To achieve the above functions, a Chinese patent (publication number: CN222141596U) discloses a closed impeller, belonging to the field of impeller technology. It solves the problem of inconvenient processing of existing impellers. This closed impeller includes a front disc, a rear disc, and several blades. The front disc has an air inlet in the middle. The front disc, rear disc, and all blades are integrally molded by injection molding. All blades are arranged in a circumferential array between the front and rear discs, with the blades being slightly curved. A flow channel with a gradually increasing cross-sectional area is formed between adjacent blades. The inner end of the flow channel is connected to the air inlet, and the outer end extends to the edges of the front and rear discs to form an air outlet. This closed impeller has the advantage of convenient processing.

[0004] While existing technologies can overcome the shortcomings mentioned above, other problems still exist in their operation: during operation, the closed impeller drives the blades to rotate, causing the blades to be in a centrifugal force field inside the impeller, and the fluid is drawn in through the suction port. Since the blades are radially distributed, the fluid is prone to pressure loss as the cross-sectional area of ​​the flow channel increases when it flows in the channel. Utility Model Content

[0005] The purpose of this invention is to provide a high-flow-rate, closed impeller to solve the problem in the background art where pressure loss is easily caused by the expansion of the cross-sectional area of ​​the flow channel when the fluid flows in the channel.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a high-flow-rate sealed impeller, comprising a first cover plate and a second cover plate;

[0007] Radially distributed main blades and secondary blades are installed between the first cover plate and the second cover plate, and the main blades and secondary blades are staggered between the first cover plate and the second cover plate. The main blades and secondary blades are both arc-shaped structures, and the width of the end of the main blade and the secondary blade near the center of the first cover plate is smaller than the width of the end away from the center of the first cover plate.

[0008] Preferably, the top and bottom of the main blade are fixedly connected with locking blocks, and the upper and lower ends of the locking blocks and the auxiliary blade are respectively engaged and connected to the inner surfaces of the first cover plate and the second cover plate.

[0009] Preferably, the inner surfaces of the first cover plate and the second cover plate are provided with radially distributed main mounting grooves and secondary mounting grooves, and the main mounting grooves and secondary mounting grooves are staggered.

[0010] Preferably, the locking blocks at the top and bottom of the main blade are respectively engaged and connected in the main mounting groove, and the upper and lower ends of the auxiliary blade are respectively installed in the auxiliary mounting groove.

[0011] Preferably, the first cover plate has an inlet at its top, and the second cover plate has a drive hole in the middle that is aligned with the center of the inlet. The second cover plate is connected to the output shaft of the drive device through the drive hole.

[0012] Preferably, a mounting bracket aligned with the suction port is fixedly connected to the middle of the side of the second cover plate near the first cover plate, and the mounting bracket is coaxially sleeved inside the suction port.

[0013] Preferably, the mounting bracket has an external thread on its top outer side, and the locking nut is fastened to the mounting bracket thread through the external thread.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] This high-flow-rate, closed impeller uses staggered secondary blades to form local contraction at the end of the flow channel. By compressing the flow space, it suppresses the pressure loss caused by the expansion of the flow channel, thereby reducing pressure loss. It forces the fluid to re-attach to the blade surface during high-speed flow and converts some of the kinetic energy into static pressure energy, thus achieving secondary pressurization.

[0016] When it is necessary to replace the main blade or the auxiliary blade, first loosen the locking nut in the opposite direction to release the cover plate constraint, separate the first cover plate and the second cover plate to expose the internal blades. When removing the old blades, the main blades need to be removed by separating the locking block from the main mounting slot, while the auxiliary blades can be directly pulled out from the auxiliary mounting slot. Damaged blades can be replaced, which facilitates impeller maintenance. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0018] Figure 2 This is a schematic diagram of the exploded structure of this utility model;

[0019] Figure 3 This is a schematic diagram of the blade structure of this utility model;

[0020] Figure 4 This is a schematic diagram of the cover plate structure of this utility model;

[0021] Figure 5 This is a schematic diagram of the locking nut structure of this utility model;

[0022] Figure 6 This is a schematic diagram of the driving hole structure of this utility model.

[0023] In the diagram: 1. First cover plate; 2. Second cover plate; 3. Main blade; 4. Secondary blade; 5. Locking block; 6. Main mounting groove; 7. Secondary mounting groove; 8. Inlet; 9. Drive hole; 10. Mounting bracket; 11. External thread; 12. Locking nut. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Example 1: Please refer to Figure 1 - Figure 6 This utility model provides the following technical solution: a high-flow-rate sealed impeller, comprising a first cover plate 1 and a second cover plate 2; radially distributed main blades 3 and auxiliary blades 4 are installed between the first cover plate 1 and the second cover plate 2, and the main blades 3 and auxiliary blades 4 are staggered between the first cover plate 1 and the second cover plate 2, both the main blades 3 and the auxiliary blades 4 are arc-shaped structures, and the width of the end of the main blades 3 and the auxiliary blades 4 near the center of the first cover plate 1 is smaller than the width of the end away from the center of the first cover plate 1; a quick-release structure is provided at the central axis position of the first cover plate 1 and the second cover plate 2; the top and bottom of the main blades 3 are fixedly connected to the locking blocks 5, and the upper and lower ends of the locking blocks 5 and the auxiliary blades 4 are respectively engaged and connected to the opposite inner surfaces of the first cover plate 1 and the second cover plate 2; the first cover plate 1 and the second cover plate 2 are... 2. The inner surfaces of the two opposite sides are provided with radially distributed main mounting grooves 6 and auxiliary mounting grooves 7, and the main mounting grooves 6 and auxiliary mounting grooves 7 are staggered. The locking blocks 5 at the top and bottom of the main blade 3 are respectively engaged in the main mounting groove 6, and the upper and lower ends of the auxiliary blade 4 are respectively installed in the auxiliary mounting grooves 7. The top of the first cover plate 1 is provided with an intake port 8, and the middle of the second cover plate 2 is provided with a drive hole 9 aligned with the center of the intake port 8, and the second cover plate 2 is connected to the output shaft of the drive device through the drive hole 9. The middle of the side of the second cover plate 2 near the first cover plate 1 is fixedly connected with a mounting bracket 10 aligned with the intake port 8, and the mounting bracket 10 is coaxially sleeved inside the intake port 8. The outer side of the top of the mounting bracket 10 is provided with an external thread 11, and the locking nut 12 is threadedly fastened to the mounting bracket 10 through the external thread 11.

[0026] First, the first cover plate 1 and the second cover plate 2 need to be pre-treated. The main mounting groove 6 and the auxiliary mounting groove 7 on their inner surfaces need to be cleaned to ensure that there are no impurities. When installing the main blade 3, the locking blocks 5 at the top and bottom of the blade need to be precisely aligned with the radial main mounting groove 6 on the cover plate and pushed in along the groove until they are fully engaged. The auxiliary blade 4 is fixed by embedding the two ends into the staggered auxiliary mounting grooves 7. During the installation process, the main blade 3 and the auxiliary blade 4 are arranged in an alternating manner.

[0027] After the blade assembly is completed, the mounting bracket 10 of the second cover plate 2 is coaxially inserted into the inlet 8 of the first cover plate 1, ensuring that the drive hole 9 is aligned with the central axis of the inlet 8. Then, the locking nut 12 is screwed into the external thread 11 at the top of the mounting bracket 10 and tightened gradually using a staged torque increase method until the lower surface of the nut is completely in contact with the top plane of the inlet 8. High-temperature resistant sealant is applied to the thread to enhance the sealing performance. Finally, the output shaft of the drive device is passed through the drive hole 9 to complete the connection.

[0028] When the drive device drives the second cover plate 2 to rotate, the first cover plate 1 and the second cover plate 2 rotate synchronously. The main blade 3 and the auxiliary blade 4 inside form a centrifugal force field in the closed flow channel. After the fluid enters axially from the suction port 8, it moves outward along the radial flow channel under the push of the rotating blade. The main blade 3 adopts a gradually expanding arc design. Its end near the center of the cover plate is narrower and the end away from the center gradually widens. This structure makes the flow velocity gradually increase and form a low-pressure zone as the flow channel cross-sectional area expands when the fluid flows through the blade.

[0029] The staggered secondary blades 4 form local contraction at the end of the flow channel, which suppresses the pressure loss caused by the expansion of the flow channel by compressing the flow space, thereby reducing pressure loss, forcing the fluid to re-attach to the blade surface in high-speed flow, and converting some kinetic energy into static pressure energy to achieve secondary pressurization.

[0030] When it is necessary to replace the main blade 3 or the auxiliary blade 4, first loosen the locking nut 12 in the opposite direction to release the cover plate constraint, separate the first cover plate 1 and the second cover plate 2 to expose the internal blades. When disassembling the old blades, the main blade 3 needs to be disassembled by separating the locking block 5 from the main mounting groove 6, while the auxiliary blade 4 can be directly pulled out from the auxiliary mounting groove 7. Damaged blades can be replaced, which is convenient for impeller maintenance.

[0031] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" or "linked" should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral connection; it can refer to a mechanical connection or an electrical connection; it can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0032] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., 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-flow-rate enclosed impeller, comprising a first cover plate (1) and a second cover plate (2); characterized in that Radially distributed main blades (3) and secondary blades (4) are installed between the first cover plate (1) and the second cover plate (2), and the main blades (3) and secondary blades (4) are staggered between the first cover plate (1) and the second cover plate (2). The main blades (3) and secondary blades (4) are both arc-shaped structures, and the width of the end of the main blade (3) and secondary blades (4) near the center of the first cover plate (1) is smaller than the width of the end away from the center of the first cover plate (1).

2. A high flow closed impeller according to claim 1, wherein: The main blade (3) is fixedly connected to the top and bottom of the blade with a locking block (5), and the upper and lower ends of the locking block (5) and the secondary blade (4) are respectively locked to the inner surfaces of the first cover plate (1) and the second cover plate (2).

3. A high flow closed impeller according to claim 2, wherein: The inner surfaces of the first cover plate (1) and the second cover plate (2) are provided with radially distributed main mounting grooves (6) and secondary mounting grooves (7), and the main mounting grooves (6) and secondary mounting grooves (7) are staggered.

4. A high flow closed impeller according to claim 3, wherein: The locking blocks (5) at the top and bottom of the main blade (3) are respectively engaged and connected in the main mounting groove (6), and the upper and lower ends of the auxiliary blade (4) are respectively installed in the auxiliary mounting groove (7).

5. A high flow closed impeller according to claim 1, wherein: The first cover plate (1) is provided with an inlet (8) at the top, and the second cover plate (2) is provided with a drive hole (9) aligned with the center of the inlet (8) in the middle, and the second cover plate (2) is connected to the output shaft of the drive device through the drive hole (9).

6. A high flow closed impeller according to claim 5, wherein: The second cover plate (2) has a mounting bracket (10) that is aligned with the suction port (8) fixedly connected to the middle of the side of the first cover plate (1), and the mounting bracket (10) is coaxially sleeved inside the suction port (8).

7. A high flow closed impeller according to claim 6, wherein: The mounting bracket (10) has an external thread (11) on its top outer side, and the locking nut (12) is threadedly fastened to the mounting bracket (10) through the external thread (11).

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