A micro centrifugal pump with improved pump cover structure

Abstract

The utility model relates to a micro centrifugal pump with improved pump cover structure, which comprises a pump body, a stator fixedly arranged on the pump body, a rotor rotatably installed on the pump body and a pump cover arranged on the pump body, and the pump cover is provided with a water inlet and a water outlet, characterized in that: the inner cavity bottom surface of the area of the pump cover close to the water outlet is axially protruded with a first protruding rib and a second protruding rib distributed on both sides of the water inlet axis of the pump cover, and the first and second protruding ribs are provided with a gap at the water inlet axis, and the inner cavity bottom surface of the area of the pump cover away from the water outlet is axially concave to form a groove connected with the water inlet. Through the above design, the inhaled air can be effectively treated to accelerate exhaust in the area of the pump cover close to the water outlet, and to collect and guide air in the area of the pump cover away from the water outlet, thereby solving the problem of air impact on the pump cover and the rotor caused by excessive air intake during the operation of the micro centrifugal pump, and improving the operation stability of the pump.

Description

Technical Field

[0001] This utility model relates to a pump cover structure, and more particularly to a micro centrifugal pump with an improved pump cover structure, which has IPC classification number F04D 29 / 42 (2006.01). Background Technology

[0002] When existing micro centrifugal pumps operate, air is drawn in through the pump cover's inlet. This air remains within the impeller cavity enclosed by the pump cover and pump body, continuously impacting the impeller and cover, generating vibration and noise. To address this issue, grooves are typically provided on the axial end face of the pump cover facing the pump body to collect the air from the impeller cavity. However, when the amount of air entering is large and the grooves are insufficient to collect it, the accumulated air in the impeller cavity rotates unpredictably and impacts the pump cover and impeller, affecting the stability of the centrifugal pump's operation. Therefore, there is a need for improvement. Utility Model Content

[0003] To address the problems described in the background section, this utility model provides the following technical solution:

[0004] A miniature centrifugal pump with an improved pump cover structure includes a pump body, a stator fixedly mounted on the pump body, a rotor rotatably mounted on the pump body, and a pump cover covering the pump body. The pump cover has an inlet and an outlet. The pump cover is characterized in that: the bottom surface of the inner cavity of the area near the outlet of the pump cover has an axially protruding first rib and a second rib distributed on both sides of the axis of the inlet of the pump cover, and the first and second ribs have a gap at the axis of the inlet; the bottom surface of the inner cavity of the area away from the outlet of the pump cover has an axially concave groove that connects to the inlet.

[0005] This invention relates to an improved pump cover structure for a micro centrifugal pump. A first and second rib are provided in the area of ​​the pump cover near the outlet to quickly guide air to the outlet for discharge. A groove is provided in the area of ​​the pump cover away from the outlet to collect air and guide it to the inlet. This design effectively addresses the problem of excessive air intake causing air to impact the pump cover and rotor during operation, thus improving the pump's operational stability.

[0006] Furthermore, the area near the outlet is a plane that passes through the pump cover inlet axis and is perpendicular to the outlet, dividing the bottom surface of the pump cover's inner cavity into a first area S1 near the outlet, and the area away from the outlet is a plane that passes through the pump cover inlet axis and is perpendicular to the outlet, dividing the bottom surface of the pump cover's inner cavity into a second area S2 away from the outlet.

[0007] Furthermore, the first and second ribs are symmetrically arranged in an inverted V-shape or arc shape.

[0008] Furthermore, the first and second ribs are inclined, and their axial height decreases as they are closer to the water outlet.

[0009] Furthermore, the groove includes several first groove portions connected to the water inlet and a second groove portion located radially outside the first groove portions and connecting adjacent first groove portions.

[0010] Furthermore, the first groove is an inclined groove whose depth gradually increases radially toward the water inlet.

[0011] Furthermore, the second groove is arc-shaped.

[0012] The more specific design and technical effects of this utility model are further explained in conjunction with the accompanying drawings in the specific embodiments. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of the miniature centrifugal pump of this utility model;

[0014] Figure 2 This is an axial sectional view of the miniature centrifugal pump of this utility model;

[0015] Figure 3 This is a front view of the first embodiment of the pump cover of the miniature centrifugal pump of this utility model;

[0016] Figure 4 This is a sectional view of the pump cover through section AA;

[0017] Figure 5 This is a front view of the second embodiment of the pump cover of the miniature centrifugal pump of this utility model;

[0018] in:

[0019] 100-Pump body, 200-Stator, 300-Rotor, 400-Pump cover, 410-Inlet, 420-Outlet, 430-First rib, 440-Second rib, 450-Groove, 451-First groove, 452-Second groove Detailed Implementation

[0020] 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.

[0021] See Figure 1 and Figure 2This utility model discloses a miniature centrifugal pump with an improved pump cover structure, including a pump body 100, a stator 200 fixedly mounted on the pump body 100, a rotor 300 rotatably mounted on the pump body 100, and a pump cover 400 covering the pump body 100. The improvement of this miniature centrifugal pump is the structure of the pump cover 400. The structures of the pump body 100, stator 200, and rotor 300 are the same as those of existing structures and will not be described again here.

[0022] See Figure 2 and Figure 3 The miniature centrifugal pump of this invention has a pump cover 400 with an inlet 410 and an outlet 420. The bottom surface of the inner cavity of the pump cover 400 near the outlet 420 has axially protruding first ribs 430 and second ribs 440 distributed on both sides of the axis of the inlet 410, with a gap between the first ribs 430 and the second ribs 440 at the axis of the inlet 410. The bottom surface of the inner cavity of the pump cover 400 away from the outlet 420 has an axially recessed groove 450 connecting to the inlet 410. This design allows the miniature centrifugal pump to quickly guide and discharge air in the area near the outlet 420 (i.e., the high-pressure area) and collect air in the area away from the outlet 420, solving the problem of excessive air intake causing air to impact the pump cover and rotor during operation and improving the pump's operational stability.

[0023] Specifically, see Figure 3 In this invention, the area of ​​the pump cover near the outlet 420 is divided into a first area S1 near the outlet 420 by a plane S perpendicular to the axis of the pump cover inlet 410 and the outlet 420; the area of ​​the pump cover away from the outlet 420 is divided into a second area S2 by a plane S perpendicular to the axis of the pump cover inlet 410 and the outlet 420. This design helps reduce the resistance of the pump cover 400 to the liquid within the cavity enclosed by it and the pump body 100, making it easier for the liquid to drain from the pump cover. To further reduce the resistance of the pump cover 400 to the liquid within the cavity enclosed by it, the first rib 430 and the second rib 440 are inclined, and the axial height of the first rib 430 and the second rib 440 decreases as they approach the outlet 420.

[0024] See Figure 3 In this invention, the first rib 430 and the second rib 440 of the pump cover 400 are arc-shaped, and the first rib 430 and the second rib 440 are symmetrically arranged. This design improves the stability and efficiency of the micro centrifugal pump. Of course, other embodiments are also possible. Figure 5 The first rib 430 and the second rib 440 of the pump cover 400 can also be designed as symmetrically arranged inverted V-shapes.

[0025] See Figure 3 The groove 450 of the pump cover 400 of this invention includes several first groove portions 451 that connect with the water inlet 410 and second groove portions 452 located radially outside the first groove portions 451 and connecting adjacent first groove portions 451. This design allows air in the area of ​​the pump cover 400 away from the water outlet 420 to more easily gather in the groove, reducing the impact of air on the pump cover 400. Furthermore, to allow air to flow more smoothly along the groove 450 and reduce the impact of air on the groove 450, the second groove portion 452 is preferably arc-shaped in axial projection.

[0026] See Figure 4 The first groove 451 of the pump cover 400 of this utility model is an inclined groove whose depth gradually increases radially towards the water inlet. This design facilitates the guidance of air entering the first groove to the water inlet and outward, reducing the accumulation of air in the first groove and thus reducing the drainage volume of the centrifugal pump, thereby improving the working efficiency of the centrifugal pump.

Claims

1. A miniature centrifugal pump with an improved pump cover structure, comprising a pump body (100), a stator (200) fixedly mounted on the pump body (100), a rotor (300) rotatably mounted on the pump body (100), and a pump cover (400) covering the pump body (100), wherein the pump cover (400) is provided with an inlet (410) and an outlet (420), characterized in that: The bottom surface of the inner cavity of the pump cover (400) near the outlet (420) has an axially protruding first rib (430) and a second rib (440) distributed on both sides of the axis of the pump cover inlet (410). The first and second ribs have a gap at the axis of the inlet (410). The bottom surface of the inner cavity of the pump cover (400) away from the outlet (420) has an axially recessed groove (450) that connects to the inlet (410).

2. The miniature centrifugal pump with improved pump cover structure according to claim 1, characterized in that: The area near the outlet (420) is a first area (S1) of the bottom surface of the inner cavity of the pump cover, which is divided by a plane passing through the axis of the pump cover inlet (410) and perpendicular to the outlet (420). The area away from the outlet (420) is a second area (S2) of the bottom surface of the inner cavity of the pump cover, which is divided by a plane passing through the axis of the pump cover inlet (410) and perpendicular to the outlet (420).

3. The miniature centrifugal pump with the improved pump cover structure according to claim 1 or 2, characterized in that: The first rib (430) and the second rib (440) are symmetrically arranged in an inverted V shape or an arc shape.

4. The miniature centrifugal pump with improved pump cover structure according to claim 3, characterized in that: The first rib (430) and the second rib (440) are inclined, and the axial height of the first rib (430) and the second rib (440) is smaller the closer they are to the water outlet (420).

5. The miniature centrifugal pump with improved pump cover structure according to claim 1, characterized in that: The groove (450) includes several first groove portions (451) that are connected to the water inlet (410) and a second groove portion (452) located radially outside the first groove portion (451) and connecting adjacent first groove portions (451).

6. The miniature centrifugal pump with improved pump cover structure according to claim 5, characterized in that: The first groove (451) is an inclined groove whose depth gradually increases radially toward the water inlet.

7. The miniature centrifugal pump with an improved pump cover structure according to claim 5 or 6, characterized in that: The second groove (452) is arc-shaped.

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