High-stability centrifugal pump

Abstract

The utility model discloses a high-stability centrifugal pump, and belongs to the technical field of centrifugal pumps. The centrifugal pump comprises a pump body, the pump body comprises a base and an upper cover, the base and the upper cover are fixedly connected, a containing space is formed in the pump body, a shaft center is installed in the containing space and used for supporting an impeller, and one end of the shaft center is fixedly connected with the interior of the base. According to the centrifugal pump provided by the utility model, the axis and the base are integrally formed by fixing the axis on the base, so that the bonding strength of the axis and the base and the perpendicularity of the axis are ensured, and the axis does not swing even if an impeller runs at a high speed for a long time; therefore, the problem that the centrifugal pump generates abnormal noise under the condition of long-time high-speed operation is greatly reduced, and normal operation of the centrifugal pump is maintained.

Description

Technical Field

[0001] This utility model belongs to the field of centrifugal pumps, and in particular relates to a highly stable centrifugal pump. Background Technology

[0002] A centrifugal pump is a pump that uses the centrifugal force generated by the rotation of an impeller to transport liquids. The impeller rotates within the pump casing formed by the base and the top cover, drawing in and accelerating the discharge of liquids.

[0003] Traditional centrifugal pumps have an independent impeller shaft, which must be riveted to the base first and then to the top cover during assembly. When the centrifugal pump is running at high speed (10,000 rpm) for a long time, the shaft is prone to loosening and abnormal noise due to the centrifugal force of the impeller, which in turn affects the normal operation of the centrifugal pump. Utility Model Content

[0004] This invention provides a highly stable centrifugal pump that can improve the connection strength between the shaft and the base and the verticality of the shaft, thus maintaining the normal operation of the centrifugal pump.

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

[0006] This utility model discloses a high-stability centrifugal pump, including a pump body, the pump body including a base and a top cover, the base and the top cover being fixedly connected, the pump body having an internal accommodating space, a shaft being installed in the accommodating space, the shaft being used to support a bearing, and one end of the shaft being fixedly connected to the inside of the base.

[0007] Optionally, the shaft is plastic-coated and fixed to the base, and the shaft and the base are integrally formed.

[0008] Optionally, the other end of the shaft is fixedly connected to the inside of the upper cover.

[0009] Optionally, a rotor is provided around the shaft, the rotor including a bearing and an impeller, the impeller being fixed to the bearing, a magnet being mounted outside the bearing, and a stator being fixedly mounted outside the rotor and the magnet.

[0010] Optionally, the top cover is threadedly fixed to the base.

[0011] Optionally, a gasket and a silicone ring are fitted onto the other end of the shaft.

[0012] Optionally, the pump body has a water inlet, and a water storage section is provided at the water inlet of the pump body. A water storage cavity is formed in the water storage section, and the height of the water storage section is 6.7 to 9.4 mm.

[0013] Optionally, an impeller is mounted outside the shaft, and the blade height of the impeller is 4.8 to 6.2 mm.

[0014] Optionally, the pump body has a water outlet, which is cylindrical and has an inner diameter of 5.8 to 6.2 mm.

[0015] The advantages of this utility model compared with the prior art are:

[0016] The technical solution provided by this utility model achieves integral molding of the shaft and the base by fixing the shaft to the base, which ensures the bonding strength between the shaft and the base and the perpendicularity of the shaft. The shaft will not wobble even when the impeller is running at high speed for a long time, thereby greatly reducing the problem of abnormal noise in the centrifugal pump under long-term high-speed operation and maintaining the normal operation of the centrifugal pump. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A cross-sectional view of a centrifugal pump in the prior art;

[0019] Figure 2 This is a schematic diagram of the structure of the high-stability centrifugal pump provided in Embodiment 1 of this utility model;

[0020] Figure 3 A cross-sectional view of the high-stability centrifugal pump provided in Embodiment 1 of this utility model;

[0021] Figure 4 This is a schematic diagram of the impeller structure provided in Embodiment 1 of this utility model;

[0022] Figure 5 This is a schematic diagram of the structure of the high-stability centrifugal pump provided in Embodiment 2 of this utility model;

[0023] Figure 6 A cross-sectional view of the high-stability centrifugal pump provided in Embodiment 2 of this utility model;

[0024] Figure 7 This is a cross-sectional view from another direction of the high-stability centrifugal pump provided in Embodiment 2 of this utility model.

[0025] The labels for the attached figures are as follows:

[0026] 1. Base; 2. Top cover; 21. Screws;

[0027] 3. Spindle; 31. Washer; 32. Silicone ring;

[0028] 4. Bearings;

[0029] 5. Rotor; 51. Impeller;

[0030] 6. Stator; 7. Magnet;

[0031] 8. Water inlet; 81. Water storage section;

[0032] 9. Water outlet. Detailed Implementation

[0033] 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.

[0034] like Figure 1 The diagram shows a cross-sectional view of a centrifugal pump in the prior art. The centrifugal pump includes a base 1 and a top cover 2, which are fixedly connected. An internal space is formed within the pump body, and a shaft 3 is installed within this space to support the impeller 51. However, since the shaft 3 supporting the impeller 51 is independent, it must be riveted to the base 1 first and then to the top cover 2 during assembly. When the centrifugal pump operates at high speed (10,000 rpm), the shaft 3 is prone to loosening and generating abnormal noise due to the centrifugal force of the impeller 51 over a long period, thus affecting the normal operation of the centrifugal pump.

[0035] Example 1

[0036] like Figures 2-4 As shown, in order to solve the above-mentioned technical problems, one end of the shaft 3 in Embodiment 1 is fixedly connected to the inside of the base 1, which improves the connection strength between the shaft 3 and the base 1 and the perpendicularity of the shaft 3. In this way, after the impeller 51 is installed, the high-speed operation is more stable and the shaft will not swing, thereby greatly reducing the problem of abnormal noise in the centrifugal pump under long-term high-speed operation and maintaining the normal operation of the centrifugal pump.

[0037] Preferably, the shaft 3 is fixed to the base 1 with a plastic coating, and the shaft 3 and the base 1 are integrally formed by the plastic coating on the base 1. The plastic coating connection provides additional wrapping and binding force, which greatly enhances the stability of the connection between the shaft 3 and the base 1 and effectively prevents the shaft 3 from loosening during use.

[0038] To further improve the structural stability of the shaft 3 within the pump body, the other end of the shaft 3 is fixedly connected to the interior of the upper cover 2. It is understood that the shaft 3 and the interior of the upper cover 2 can be fixed by riveting, bonding, or interference fit, and no specific limitation is made here.

[0039] There are several ways in which the rotor 5 of a centrifugal pump can rotate. For example, the rotor 5 can be directly driven to rotate via electrodes. Another example is... Figure 3 As shown, a rotor 5 is mounted on the outer sleeve of the shaft 3. The rotor 5 includes a bearing 4 and an impeller 51. The impeller 51 is fixed on the bearing 4. A magnet 7 is mounted on the outside of the bearing 4. The shaft 3 supports the bearing 4 and the impeller 51. The rotor 5 rotates as a whole under the action of an alternating magnetic field, thereby realizing the rotation of the impeller 51. A stator 6 is fixedly mounted on the outside of the rotor 5 and the magnet 7. The stator 6 maintains the accuracy of the relative positions of the components of the centrifugal pump and maintains the stability of the shaft 3.

[0040] The upper cover 2 is threadedly fixed to the base 1, which makes disassembly relatively simple. The upper cover 2 and the base 1 are threadedly sealed by screws 21.

[0041] In order to achieve precise positioning when the shaft 3 is connected to the upper cover 2, a gasket 31 and a silicone ring 32 are fitted on the other end of the shaft 3. When the gasket 31 is fitted on the shaft 3, it can act as a precise axial limit baffle to prevent the components from moving excessively or moving around, and ensure that the components maintain a precise and stable axial distance. The silicone ring 32 fits against the surface of the shaft 3 and constrains the components to be assembled later from the radial direction.

[0042] To increase the drainage flow rate of the centrifugal pump, a water storage section 81 is provided at the water inlet 8 of the pump body. A water storage cavity is formed inside the water storage section 81. The height of the water storage section 81 is 6.7mm. Increasing the volume of the water storage cavity reduces energy loss caused by water flow impact, and the impeller pushes the water to be discharged more smoothly and quickly, thereby increasing the drainage flow rate and maintaining a stable drainage output.

[0043] In Example 1, the blade height of impeller 51 is 4.8 mm. Increasing the height of impeller 51 expands the contact area between impeller 51 and fluid, guides water flow along a more reasonable path, and increases the drainage volume per unit time by 10%.

[0044] In Example 1, the outlet 9 is cylindrical with an inner diameter of 5.8 mm. By increasing the inner diameter of the outlet 9 on the centrifugal pump cover 2, the drainage capacity per unit time is increased.

[0045] Example 2

[0046] like Figures 5-7As shown, in order to solve the above-mentioned technical problems, one end of the shaft 3 in Embodiment 1 is fixedly connected to the inside of the base 1, which improves the connection strength between the shaft 3 and the base 1 and the perpendicularity of the shaft 3. In this way, after the impeller 51 is installed, the high-speed operation is more stable and the shaft will not swing, thereby greatly reducing the problem of abnormal noise in the centrifugal pump under long-term high-speed operation and maintaining the normal operation of the centrifugal pump.

[0047] Preferably, the shaft 3 is fixed to the base 1 with a plastic coating, and the shaft 3 and the base 1 are integrally formed by the plastic coating on the base 1. The plastic coating connection provides additional wrapping and binding force, which greatly enhances the stability of the connection between the shaft 3 and the base 1 and effectively prevents the shaft 3 from loosening during use.

[0048] To further improve the structural stability of the shaft 3 within the pump body, the other end of the shaft 3 is fixedly connected to the interior of the upper cover 2. It is understood that the shaft 3 and the interior of the upper cover 2 can be fixed by riveting, bonding, or interference fit, and no specific limitation is made here.

[0049] There are several ways in which the rotor 5 of a centrifugal pump can rotate. For example, the rotor 5 can be directly driven to rotate via electrodes. Another example is... Figure 6 As shown, a rotor 5 is mounted on the outer sleeve of the shaft 3. The rotor 5 includes a bearing 4 and an impeller 51. The impeller 51 is fixed on the bearing 4. A magnet 7 is mounted on the outside of the bearing 4. The shaft 3 supports the bearing 4 and the impeller 51. The rotor 5 rotates as a whole under the action of an alternating magnetic field, thereby realizing the rotation of the impeller 51. A stator 6 is fixedly mounted on the outside of the rotor 5 and the magnet 7. The stator 6 maintains the accuracy of the relative positions of the components of the centrifugal pump and maintains the stability of the shaft 3.

[0050] The upper cover 2 is threadedly fixed to the base 1, which makes disassembly relatively simple. The upper cover 2 and the base 1 are threadedly sealed by screws 21.

[0051] In order to achieve precise positioning when the shaft 3 is connected to the upper cover 2, a gasket 31 and a silicone ring 32 are fitted on the other end of the shaft 3. When the gasket 31 is fitted on the shaft 3, it can act as a precise axial limit baffle to prevent the components from moving excessively or moving around, and ensure that the components maintain a precise and stable axial distance. The silicone ring 32 fits against the surface of the shaft 3 and constrains the components to be assembled later from the radial direction.

[0052] To increase the drainage flow rate of the centrifugal pump, a water storage section 81 is provided at the water inlet 8 of the pump body. A water storage cavity is formed inside the water storage section 81. The height of the water storage section 81 is 9.4mm. Increasing the volume of the water storage cavity reduces energy loss caused by water flow impact, and the impeller pushes the water to be discharged more smoothly and quickly, thereby increasing the drainage flow rate and maintaining a stable drainage output.

[0053] In Example 2, the blade height of impeller 51 is 6.2mm. Increasing the height of impeller 51 expands the contact area between impeller 51 and fluid, guides water flow along a more reasonable path, and increases the drainage volume per unit time by 10%.

[0054] In Example 2, the outlet 9 is cylindrical with an inner diameter of 6.2 mm. By increasing the inner diameter of the outlet 9 on the centrifugal pump cover 2, the drainage volume per unit time is increased.

[0055] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A high-stable centrifugal pump, characterized by, The pump body comprises a base and an upper cover, the base and the upper cover are fixedly connected, an accommodating space is formed inside the pump body, a shaft is installed in the accommodating space, the shaft is used for supporting an impeller, one end of the shaft is fixedly connected with the inside of the base, the shaft is plastic-bonded with the base, the shaft is integrally arranged with the base, the other end of the shaft is fixedly connected with the inside of the upper cover, the pump body has a water inlet, a water storage part is arranged at the water inlet of the pump body, a water storage cavity is formed in the water storage part, an impeller is installed outside the shaft, and the blade height of the impeller is 4.8-6.2 mm.

2. A high stability centrifugal pump according to claim 1, characterized in that The shaft is sleeved with a rotor, the rotor comprises a bearing and the impeller, the impeller is fixed on the bearing, a magnet is installed outside the bearing, a stator is fixedly installed outside the rotor and the magnet.

3. A high stability centrifugal pump as claimed in claim 1, wherein, The upper cover is fixedly connected with the base in a threaded mode.

4. A high stability centrifugal pump as claimed in claim 1, wherein, A gasket and a silica gel ring are installed outside the other end of the shaft.

5. A high stability centrifugal pump as claimed in claim 1, wherein, The height of the water storage part is 6.7-9.4 mm.

6. A high stability centrifugal pump as claimed in claim 1, wherein, The pump body has a water outlet, the water outlet is in a cylindrical shape, and the inner diameter of the water outlet is 5.8-6.2 mm.

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