Multi-stage water pump with novel structure

Abstract

The utility model provides a multistage water pump with a novel structure, and belongs to the technical field of water pumps. The problem that in the prior art, a multi-stage impeller is prone to damage is solved. The water pump comprises a front pump cover, a pump shell, a water pump base and a driving motor, the front pump cover is installed on one side of the pump shell, a diffuser, a multi-stage impeller and a partition plate are installed in the pump shell, the multi-stage impeller comprises an impeller base, blades and an impeller cover body, the multi-stage impeller is installed in the diffuser, and the partition plate is fixedly installed at one end of the diffuser. A limiting convex body is formed on one side of the impeller cover body, a limiting groove is formed in the inner side of the partition plate, the limiting convex body is connected with the limiting groove, a shaft sleeve is formed on the impeller base and penetrates through the diffuser, and a driving shaft extends out of the driving motor and penetrates through the shaft sleeve. The multi-stage impeller has the advantage of long service life.

Description

Technical Field

[0001] This utility model belongs to the field of water pump technology and relates to a novel multi-stage water pump. Background Technology

[0002] A multistage pump is a type of pump with multiple impellers connected in series on the same shaft. Each impeller progressively increases the pressure of the liquid, thereby enabling the liquid to be lifted to a higher height or to generate higher pressure.

[0003] Chinese patent publication number CN203130531U discloses a multi-stage centrifugal pump, including a motor, a pump body, a guide shell, and multi-stage impellers. The motor is fixedly connected to the pump body, and the motor shaft extends into the pump body and is fixedly connected to a main shaft. Multi-stage impellers and guide shells are fixedly connected to the main shaft. The multi-stage impellers include a first-stage impeller near the water inlet end of the pump body and a last-stage impeller near the motor. The main shaft is characterized by having a bushing that presses the first-stage impeller tightly, and a locating pin that radially positions the bushing through the end of the main shaft.

[0004] The patent provides a multi-stage centrifugal pump in which no spacer is provided between the multi-stage impellers, making the multi-stage impellers prone to damage during long-term use. Utility Model Content

[0005] The purpose of this invention is to address the aforementioned problems in the existing technology by providing a novel multistage water pump.

[0006] The objective of this utility model can be achieved through the following technical solution: A novel multi-stage water pump includes a front pump cover, a pump casing, a pump base, and a drive motor. The front pump cover is installed on one side of the pump casing. A diffuser, multi-stage impellers, and a spacer plate are installed inside the pump casing. The multi-stage impellers include an impeller base, blades, and an impeller cover. The multi-stage impellers are installed inside the diffuser. The spacer plate is fixedly installed at one end of the diffuser. A limiting protrusion is formed on one side of the impeller cover. A limiting groove is opened on the inner side of the spacer plate. The limiting protrusion is connected to the limiting groove. A bushing is formed on the impeller base. The bushing passes through the diffuser. A drive shaft extends from the drive motor and passes through the bushing.

[0007] In the above-mentioned novel multistage water pump, an outlet is provided on the front side of the upper end of the front pump cover, and an outlet sealing cover is provided at the end of the outlet. An inlet is provided on the upper end of the pump base, and an inlet sealing cover is provided at the end of the inlet.

[0008] In the aforementioned novel multistage water pump, a plurality of guide vanes are formed at one end of the diffuser, and a plurality of diffusion vanes are formed on the inner end face of the diffuser.

[0009] In the aforementioned novel multistage water pump, the pump base is installed between the pump casing and the drive motor, and a connecting body is formed on the front side of the pump base, the connecting body extending into the pump casing.

[0010] Compared with the prior art, the multi-stage water pump with a novel structure provided by this utility model has the following beneficial effects: through the structural arrangement of diffuser, multi-stage impeller and partition plate, the multi-stage impeller is installed inside the diffuser and the partition plate is installed on the side end of the diffuser, so that the multi-stage impellers will not affect each other, resulting in a long service life. Furthermore, the multi-stage impeller structure is made more stable by the connection between the limiting protrusion on one side of the impeller cover and the limiting groove on the inner side of the partition plate. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0012] Figure 2 This is a schematic diagram of the exploded structure of this utility model;

[0013] Figure 3 This is a schematic diagram of the diffuser, multi-stage impeller, and spacer structure.

[0014] Figure 4 This is a schematic diagram of the diffuser, multi-stage impeller, and spacer from another angle.

[0015] In the diagram: 1. Front pump cover; 11. Outlet; 12. Outlet sealing cover; 2. Pump casing; 3. Pump base; 31. Inlet; 32. Inlet sealing cover; 33. Connector; 4. Drive motor; 41. Drive shaft; 5. Diffuser; 51. Guide vane; 52. Diffuser vane; 6. Multistage impeller; 61. Impeller base; 611. Shaft sleeve; 62. Blade; 63. Impeller cover; 631. Limiting protrusion; 7. Spare plate; 71. Limiting groove. Detailed Implementation

[0016] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0017] like Figures 1 to 4 As shown in the diagram, this embodiment includes a front pump cover 1, a pump housing 2, a water pump base 3, a drive motor 4, a diffuser 5, a multi-stage impeller 6, and a spacer plate 7. The front pump cover 1 is installed on one side of the pump housing 2, and the water pump base 3 is installed between the pump housing 1 and the drive motor 4. A connector 33 is formed on the front side of the water pump base 3. The connector 33 extends into the pump housing 1 to securely connect the water pump base 3 and the pump housing 2. The other end of the water pump base 3 is connected to one side of the drive motor 4. The diffuser 5, the multi-stage impeller 6, and the spacer plate 7 are interconnected and installed inside the pump housing 2. There are three diffusers 5, three multi-stage impellers 6, and three spacer plates 7.

[0018] like Figures 1 to 4 As shown, the multi-stage impeller 6 includes an impeller base 61, blades 62, and an impeller cover 63. The multi-stage impeller 6 is installed inside the diffuser 5. The spacer plate 7 is fixedly installed at one end of the diffuser 5 and seals one end of the diffuser 5. A limiting protrusion 631 is formed on one side of the impeller cover 63. A limiting groove 71 is opened on the inner side of the spacer plate 7. When the impeller cover 63 and the spacer plate 7 are connected and fixed, the limiting protrusion 631 is connected to the limiting groove 71. Several guide vanes 51 are formed at one end of the diffuser 5. The guide vanes 51 convert the kinetic energy of the liquid into pressure energy. Several diffusion vanes 52 are formed on the inner end face of the diffuser 5. A bushing 611 is formed on the impeller base 61. The bushing 611 passes through the diffuser 5. The drive motor 4 extends out with a drive shaft 41. The drive shaft 41 passes through three bushings 611 and drives the diffuser 5, the multi-stage impeller 6, and the spacer plate 7 to rotate.

[0019] To elaborate further, such as Figures 1 to 2 As shown, the front pump cover 1 has an outlet 11 on the front side of the upper end, and an outlet sealing cover 12 is provided at the end of the outlet 11. The pump base 3 has an inlet 31 on the upper end, and an inlet sealing cover 32 is provided at the end of the inlet 31. Both the outlet sealing cover 12 and the inlet sealing cover 32 are detachable. When not in use in this embodiment, the outlet sealing cover 12 and the inlet sealing cover 32 can be installed at the outlet 11 and the inlet 31 to effectively protect this embodiment from the influence of dust and other impurities.

[0020] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0021] Although this document uses a variety of terms, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of this invention; interpreting them as any additional limitation would contradict the spirit of this invention.

Claims

1. A novel multistage water pump, comprising a front pump cover (1), a pump casing (2), a pump base (3), and a drive motor (4), characterized in that: The front pump cover (1) is installed on one side of the pump casing (2). The pump casing (2) is equipped with a diffuser (5), a multi-stage impeller (6) and a spacer plate (7). The multi-stage impeller (6) includes an impeller base (61), blades (62) and an impeller cover (63). The multi-stage impeller (6) is installed inside the diffuser (5). The spacer plate (7) is fixedly installed at one end of the diffuser (5). A limiting protrusion (631) is formed on one side of the impeller cover (63). A limiting groove (71) is opened on the inner side of the spacer plate (7). The limiting protrusion (631) is connected to the limiting groove (71). A bushing (611) is formed on the impeller base (61). The bushing (611) passes through the diffuser (5). The drive motor (4) extends with a drive shaft (41). The drive shaft (41) passes through the bushing (611).

2. The multi-stage water pump with a novel structure according to claim 1, characterized in that: The front pump cover (1) has an outlet (11) on the front side of the upper end, and the outlet (11) is sealed with an outlet sealing cover (12). The pump base (3) has an inlet (31) on the upper end, and the inlet (31) is sealed with an inlet sealing cover (32).

3. The multi-stage water pump with a novel structure according to claim 1, characterized in that: The diffuser (5) has a plurality of guide vanes (51) formed at one end, and a plurality of diffuser vanes (52) formed on the inner end face of the diffuser (5).

4. The multi-stage water pump with a novel structure according to claim 1, characterized in that: The water pump base (3) is installed between the pump casing (2) and the drive motor (4). A connector (33) is formed on the front side of the water pump base (3), and the connector (33) extends into the pump casing (2).

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