A self-exhaust micro axial flow booster pump

Abstract

The present invention belongs to the technical field of water pumps, and discloses a self-exhausting micro axial flow booster pump, comprising a housing, a pump assembly arranged in the housing, the pump assembly comprising an intermediate housing, a water inlet housing and a water outlet housing, an impeller chamber is formed between the water inlet housing and the intermediate housing, a water outlet water collecting chamber is formed between the water outlet housing and the intermediate housing, and a stator chamber and a rotor chamber are provided in the intermediate housing, a stator is provided in the stator chamber, and glue is poured in the stator chamber; a rotor assembly is provided in the rotor chamber, and the rotor chamber passes through the impeller chamber downwards and the water outlet water collecting chamber upwards. The present invention adds an exhaust structure, solves the problem of the existing gas squeezing out the water in the rotor chamber and causing the rotor assembly to burn, thereby improving the overall performance and making installation easier.

Description

Technical Field

[0001] The invention belongs to the technical field of water pumps, and in particular relates to a self-exhaust micro axial flow booster pump. Background Art

[0002] A booster pump is a device used to transport liquids. Existing booster pumps are not beautiful in appearance and not compact in structure, making them inconvenient to move during actual use. In addition, existing compact booster pumps have poor overall sealing performance.

[0003] The applicant has previously applied for a micro axial flow booster pump with patent application number 2019203002492, which includes a shell, which is a straight cylindrical structure. A pump assembly is arranged in the shell, and the pump assembly includes an intermediate shell, a water inlet shell and a water outlet shell. The water inlet shell is provided with a water inlet and an impeller chamber; the intermediate shell is provided with a stator cavity and a rotor cavity respectively, the stator cavity is provided with a stator, and glue is poured in the stator cavity; the rotor cavity is provided with a rotor, the rotor is connected to the impeller, the impeller is in the impeller chamber of the water inlet shell, and the impeller and the rotor are an integrated structure. The micro axial flow booster pump of the above structure has a rotor cavity that is communicated with the impeller chamber. The rotor cavity is filled with water. The water has a lubricating effect on the rotor and the rotor shaft, and makes the rotor rotate smoothly, reducing the temperature between the rotor and the rotor shaft, so that the rotor can work normally. In actual use, the rotor and the stator will generate heat when working, which will cause the water to heat up and form gas in the rotor cavity. If the micro axial flow booster pump is placed vertically and the water inlet shell is at the bottom, the gas accumulates in the rotor cavity, and then the water in the rotor cavity is discharged from the rotor cavity, which causes the lubricant between the rotor and the rotor shaft to be lost, resulting in heating and severe wear of the rotor and the rotor shaft when they rotate relative to each other, and then shortening the service life of the micro axial flow booster pump. Therefore, the micro axial flow booster pump of the above structure has strict requirements on the direction of placement when in use, which makes the installation requirements higher, and the installation cost and later maintenance cost higher, and cannot meet the user's demand for convenient installation; in addition, even if the micro axial flow booster pump is installed by professionals and the installation position is accurate, during long-term operation, due to the limited exhaust speed, hot air will still be generated in the rotor cavity. The hot air further heats and vaporizes the water in the rotor chamber, thereby reducing the water in the rotor cavity, thereby causing the rotor and rotor shaft to wear and reduce the service life. Summary of the invention

[0004] The present invention aims to solve the technical problem that the existing axial flow booster pump, due to improper installation, causes gas to squeeze water out of the rotor cavity, thus causing rotor assembly failure.

[0005] The technical solution adopted by the present invention to solve the above technical problems is:

[0006] The invention discloses a self-exhaust micro axial flow booster pump, comprising a shell and a pump assembly arranged in the shell, wherein the pump assembly comprises an intermediate shell, a water inlet shell and a water outlet shell, an impeller chamber is formed between the water inlet shell and the intermediate shell, a water outlet water collecting chamber is formed between the water outlet shell and the intermediate shell, a stator chamber and a rotor chamber are respectively arranged in the intermediate shell, a stator is arranged in the stator chamber, and glue is poured in the stator chamber; a rotor assembly is arranged in the rotor chamber, and the rotor chamber passes through the impeller chamber downwards and passes through the water outlet water collecting chamber upwards.

[0007] The rotor cavity is connected with the water outlet and water collecting cavity through a conical tube.

[0008] The stator cavity faces the direction of the water outlet and water collecting cavity, and a cover is provided on the stator cavity, the cover wraps the conical tube inside, and a plurality of vents are provided on the cover; the height of the glue filling in the stator cavity is lower than the free end of the conical tube.

[0009] The rotor assembly includes a fixed shaft, a rotating sleeve, an impeller frame and a rotor. The rotating sleeve is made of graphite and is built and fixed in the rotor. The fixed shaft is matched and inserted in the rotating sleeve, so that the rotor can rotate relative to the fixed shaft. The rotor is fixed on the impeller frame, and the impeller frame has an impeller, which is located in the impeller chamber.

[0010] The two ends of the fixed shaft are flat shafts, and ceramic gaskets are sleeved on the flat shafts.

[0011] A sealing ring is sleeved on the outer peripheral surface of the cover body, and the sealing ring is tightly sealed on the inner wall of the stator cavity.

[0012] A circuit control device is also arranged in the space enclosed by the cover body and the stator cavity, and the circuit of the circuit control device is wrapped with a sealing sleeve.

[0013] The rotor cavity is provided with flow guiding ribs.

[0014] The beneficial effects of the present invention are:

[0015] Compared with the prior art, the self-exhaust micro axial flow booster pump of the present invention has a rotor cavity on the intermediate shell whose lower part passes through the impeller chamber and whose upper part passes through the water outlet collecting cavity. No matter what the placement angle of the booster pump is, the gas in the rotor cavity can be discharged smoothly and the rotor cavity is always kept full of water, thus providing conditions for the normal operation of the rotor assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a quarter stereogram of the self-exhaust micro axial flow booster pump of the present invention;

[0017] Figure 2 is a cross-sectional view of the intermediate housing of the self-exhaust micro axial flow booster pump of the present invention;

[0018] Figure 3 It is a stereoscopic view of the intermediate shell of the self-exhaust micro axial flow booster pump of the present invention;

[0019] Figure 4 It is a three-dimensional exploded view of the intermediate shell of the self-exhaust micro axial flow booster pump of the present invention;

[0020] Figure 5 It is a stereoscopic view of another viewing angle in the middle of the self-exhaust micro axial flow booster pump of the present invention;

[0021] Figure 6 It is a three-dimensional exploded view of the self-exhaust micro axial flow booster pump of the present invention. DETAILED DESCRIPTION

[0022] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments:

[0023] See also Figures 1 to 6 The present invention provides a self-exhaust micro axial flow booster pump, comprising a shell 1, a pump assembly arranged in the shell 1, the pump assembly comprising an intermediate shell 2, a water inlet shell 3 and a water outlet shell 4, an impeller chamber 5 is formed between the water inlet shell 3 and the intermediate shell 2, a water outlet water collecting chamber 6 is formed between the water outlet shell 4 and the intermediate shell 2, and the intermediate shell 2 is provided with a stator chamber 7 and a rotor chamber 8 respectively independently, a stator 9 is provided in the stator chamber 7, and glue 22 is poured in the stator chamber 7; a rotor assembly 10 is provided in the rotor chamber 8, and the rotor chamber 8 passes through the impeller chamber 5 downward and the water outlet water collecting chamber 6 upward.

[0024] The rotor chamber 8 is connected to the water outlet and water collecting chamber 6 through a conical tube 11 .

[0025] The stator cavity 7 faces the water outlet and water collecting cavity 6 , and a cover 12 is provided on the stator cavity 7 , the cover 12 wraps the conical tube 11 inside, and a plurality of vents 13 are provided on the cover 12 ; the height of the glue filling in the stator cavity 7 is lower than the free end of the conical tube 11 .

[0026] The rotor assembly 10 includes a fixed shaft 14, a rotating sleeve 15, an impeller frame 16 and a rotor 17. The rotating sleeve 15 is made of graphite and is fixed inside the rotor 17. The fixed shaft 14 is matched and inserted into the rotating sleeve 15, so that the rotor 17 can rotate relative to the fixed shaft 14. The rotor 17 is fixed on the impeller frame 16. The impeller frame 16 has an impeller 18, and the impeller 18 is located in the impeller chamber 5.

[0027] Both ends of the fixed shaft 14 are flat shafts, and ceramic gaskets 23 are sleeved on the flat shafts.

[0028] A sealing ring 24 is sleeved on the outer circumference of the cover body 12 , and the sealing ring 24 is tightly sealed against the inner wall of the stator cavity 7 .

[0029] A circuit control device is also disposed in the space enclosed by the cover body 12 and the stator cavity 7 , and the circuit of the circuit control device is wrapped with a sealing sleeve 25 .

[0030] The sealing ring 24 and the sealing sleeve 25 described above can further improve the airtightness of the stator cavity 7 and improve the waterproofness of the circuit control device.

[0031] The rotor cavity 8 is provided with flow guide ribs 19 .

[0032] The working principle of the self-exhaust micro axial flow booster pump of the present invention is described below:

[0033] The self-exhaust micro axial flow booster pump of the present invention has the same working principle as the patent of a micro axial flow booster pump with the patent application number of 2019203002492 previously applied for, and the difference lies in: the addition of a conical tube 11 and a cover 12. The stator 9 is installed in the stator cavity 7, and the circuit control device is arranged at the upper end of the stator 9, and the cover 12 is covered at the opening position of the stator cavity 7, so that the conical tube 11 is also covered inside, and then the stator cavity 7 is filled with glue 22, and the height of the glue 22 is not higher than the exhaust port 20 of the conical tube 11. A plurality of vents 13 are arranged on the cover 12, so that the gas in the rotor cavity 8 is discharged to the water outlet water collection cavity 6 through the conical tube 11, the cover 12, and the vents 13, and the cover 12 also acts as a support, providing installation support for the flow switch 21 in the water outlet shell 4. The larger diameter of the conical tube 11 is connected to the rotor cavity 8, and the smaller diameter is the exhaust port 20, which is conducive to better discharge of gas. A guide rib 19 is provided in the rotor cavity 8. The guide rib 19 allows the water in the rotor cavity 8 to flow smoothly to the conical tube 11 in a vortex manner, and finally rush to the water outlet collecting cavity 6 after being pressurized by the conical tube 11.

[0034] The self-exhaust micro axial flow booster pump provided in the embodiment of the present invention is introduced in detail above. Specific examples are used in this article to illustrate the principle and implementation mode of the present invention. The description of the above embodiments is only used to help understand the technical solution disclosed by the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation mode and application scope. In summary, the content of this specification should not be understood as a limitation of the present invention.

Claims

1. A self-exhaust micro axial flow booster pump, comprising a housing, a pump assembly arranged in the housing, the pump assembly comprising an intermediate housing, a water inlet housing and a water outlet housing, an impeller chamber is formed between the water inlet housing and the intermediate housing, a water outlet water collecting chamber is formed between the water outlet housing and the intermediate housing, a stator chamber and a rotor chamber are provided in the intermediate housing, a stator is provided in the stator chamber, and glue is poured in the stator chamber; a rotor assembly is provided in the rotor chamber, characterized in that: The rotor cavity passes through the impeller chamber downward and passes through the water outlet collecting chamber upward; the rotor cavity is connected to the water outlet collecting chamber through a conical tube; the stator cavity faces the direction of the water outlet collecting chamber, and a cover body is provided on the stator cavity, the cover body wraps the conical tube inside, and the cover body is provided with a plurality of ventilation holes; the glue filling height in the stator cavity is lower than the free end of the conical tube; the rotor assembly includes a fixed shaft, a rotating sleeve, an impeller frame and a rotor, the rotating sleeve is made of graphite, built-in and fixed in the rotor, and the fixed shaft is matched and inserted in the rotating sleeve, so that the rotor can rotate relative to the fixed shaft, the rotor is fixed on the impeller frame, and the impeller is provided on the impeller frame, and the impeller is in the impeller chamber; the two ends of the fixed shaft are flat shafts, and ceramic gaskets are sleeved on the flat shafts.

2. A self-exhaust micro axial flow booster pump according to claim 1, characterized in that: A sealing ring is sleeved on the outer peripheral surface of the cover body, and the sealing ring is tightly sealed on the inner wall of the stator cavity.

3. A self-exhaust micro axial flow booster pump according to claim 1, characterized in that: A circuit control device is also arranged in the space enclosed by the cover body and the stator cavity, and the circuit of the circuit control device is wrapped with a sealing sleeve.

4. A self-exhaust micro axial flow booster pump according to claim 1, characterized in that: The rotor cavity is provided with flow guiding ribs.

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