Automatic descaling hydroelectric generator

Abstract

The utility model discloses an automatic descaling hydroelectric generator which comprises a shell, an impeller, a stator and a rotor, the stator is installed in the shell, an impeller shaft of the impeller can move in the axial direction and can be rotationally connected to a shaft sleeve, and when water enters the water inlet end of the shell, the impeller is impacted to drive the impeller shaft to move in the axial direction to scrape water scale between the impeller shaft and the shaft sleeve. The utility model has the beneficial effects that the impeller is arranged towards the water inlet end, and the impeller shaft is designed to be capable of axially moving, so that the impeller shaft frequently axially moves to scrape scale between the impeller shaft and the shaft sleeve according to the principle that the impeller is impacted by the impact force of water during water inlet to enable the impeller shaft to axially move and the impeller shaft is reset when water inlet is stopped; long-term no scale accumulation at the rotating contact position between the impeller shaft and the shaft sleeve is ensured, so that long-term stable operation of the generator can be ensured.

Description

Technical Field

[0001] The invention belongs to the technical field of hydropower generation, and in particular relates to a miniature automatic descaling hydropower generator. Background Art

[0002] Currently, the micro hydroelectric generators on the market, such as those on faucets, generate electricity by driving the generator impeller with water. However, since there will be scale in the water, the scale will affect the friction between the impeller shaft and the sleeve. In severe cases, the impeller shaft will not be able to rotate, resulting in the inability to generate electricity. Summary of the Invention

[0003] The technical problem to be solved by the present invention is how to prevent scale from affecting the normal operation of the generator.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is:

[0005] An automatic descaling hydroelectric generator comprises a casing, an impeller, a stator and a rotor. The stator is mounted inside the casing. The impeller shaft of the impeller is both axially movable and rotatable and is connected to a shaft sleeve. When water enters the water inlet end of the casing, the impeller is impacted and the impeller shaft is driven to move axially to scrape off scale between the impeller shaft and the shaft sleeve.

[0006] Preferably, the shaft sleeve has a hollow structure inside with one end open, the impeller shaft extends from the open end, and a space for the rotor to rotate is provided inside the shaft sleeve.

[0007] Preferably, an elastic driving mechanism for driving the impeller shaft to axially reset is provided in the shaft sleeve.

[0008] Preferably, the elastic driving mechanism includes a spring and a steel ball, one end of the spring abuts against the inner wall of the sleeve, and the other end abuts against the steel ball, and the steel ball abuts against the impeller shaft.

[0009] Preferably, the shaft sleeve is formed by splicing two parts.

[0010] Preferably, the shaft sleeve is tightly fitted with the outer shell, and a sealing ring is provided between the shaft sleeve and the outer shell.

[0011] Preferably, the impeller shaft is provided with a limiting portion for limiting the axial extension length of the impeller shaft.

[0012] Preferably, the limiting portion is an integral structure with the impeller shaft or is fixed on the impeller shaft.

[0013] Preferably, the water inlet end of the casing is arranged toward the end face of the impeller, or the water inlet end of the casing is arranged toward the side face of the impeller.

[0014] Beneficial effects of the present invention: The present invention designs the impeller shaft to be axially movable, and utilizes the impact force of water when water enters to impact the impeller to make the impeller shaft move axially. When water entry stops, the impeller shaft resets according to the principle, so that the impeller shaft frequently moves axially to scrape off the scale between the impeller shaft and the shaft sleeve, ensuring that there is no scale accumulation at the rotating contact position between the impeller shaft and the shaft sleeve for a long time, thereby ensuring the stable operation of the generator for a long time. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional diagram of the utility model;

[0016] Figure 2 This is a top view of the utility model;

[0017] Figure 3 for Figure 2 Cross-sectional view in the AA direction. DETAILED DESCRIPTION

[0018] The present invention will be further described below with reference to the embodiments.

[0019] like Figure 1-Figure 3 The illustrated embodiment shows an automatic descaling hydroelectric generator, which is primarily used in small products, such as faucets, to power temperature display units. The generator primarily comprises a housing 1, an impeller 2, a stator 3, and a rotor 4. A portion of the housing 1 contacts the water flow, while another portion is sealed to the faucet via a first sealing ring 7 to protect the circuit segment from water. The stator 3 is mounted within the housing 1 at an end separated from the waterway. It is noteworthy that the impeller shaft 5 of the impeller 2 is both axially movable and rotatably connected to a sleeve 6. In this embodiment, the water inlet 11 of the housing 1 is preferably positioned toward the end face of the impeller 2. Alternatively, the water inlet may be designed to face the side of the impeller. Side water inlet exerts less axial impact on the impeller. To increase the axial motion of the impeller, the impeller shape may be appropriately modified, such as by providing ribs or baffles perpendicular to the side water inlet. The stator may be mounted on the inner wall of the housing or on the sleeve. When water enters the water inlet 11 of the housing 1, it impacts the impeller 2, driving the impeller shaft 5 to axially move, thereby scraping away scale between the impeller shaft 5 and the sleeve 6. The water inlet end 11 is set toward the end face of the impeller 2 not only to drive the impeller 2 to rotate, but also to drive the impeller shaft 5 to move axially, so as to scrape off the dirt attached to the impeller shaft 5 through the reciprocating motion of the impeller shaft 5. The dirt will be scraped off every time the faucet is opened and closed, thereby ensuring that the impeller shaft 5 and the shaft sleeve 6 remain clean, reducing resistance, and ensuring the long-term normal operation of the generator.

[0020] The shaft sleeve 6 in this embodiment has a hollow interior with an open end. The impeller shaft 5 extends from this open end. The end of the impeller shaft 5 is fixedly connected to the impeller 2. The shaft sleeve 6 has a space for the rotor 4 to rotate. The shaft sleeve 6 in this embodiment is composed of two parts. The rotor 4 is first installed on the impeller shaft 5 and then installed in the shaft sleeve 6. The two parts of the shaft sleeve 6 are then fixed together. The two parts of the shaft sleeve 6 can be fixed together by welding, bonding, etc. The two parts of the shaft sleeve 6 need to be sealed with a sealing structure. They can be directly fixed with sealant, which not only serves as a connection but also a sealing function. The shaft sleeve 6 is tightly fitted with the housing 1, and a second sealing ring 10 is provided between the shaft sleeve 6 and the housing 1.

[0021] The faucet can be designed to allow water to flow in from the bottom up. In this way, when the faucet is turned off, the impeller shaft 5 automatically moves downward and resets due to the gravity of the impeller shaft 5 and the impeller 2. Of course, an elastic driving mechanism for driving the axial reset of the impeller shaft 5 can also be provided in the sleeve 6. The elastic driving mechanism includes a spring 8 and a steel ball 9. One end of the spring 8 abuts the inner wall of the sleeve 6, and the other end abuts the steel ball 9. The steel ball 9 abuts the impeller shaft 5. In this embodiment, a movable space for the axial movement of the impeller shaft is provided in the sleeve, and the spring and the steel ball are arranged in the space. With the reset of the elastic driving mechanism, the water inlet can be designed to be in any direction, but the water inlet direction must be set toward the end face of the impeller 2 to drive the axial displacement of the impeller shaft 5. The arrangement of the steel ball 9 reduces the contact area between the impeller shaft 5 and the steel ball 9 when rotating, thereby reducing frictional resistance.

[0022] To prevent the impeller 2 from colliding with other components when the water is turned off, this embodiment provides a stopper on the impeller shaft 5 to limit the axial extension of the impeller shaft 5. In this embodiment, the stopper is integral with the impeller shaft 5 or fixed to the impeller shaft 5. The stopper limits the axial displacement of the impeller shaft 5, preventing it from extending excessively after the water is turned off.

[0023] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Simple modifications and substitutions by those skilled in the art without departing from the spirit and scope of the present invention are within the scope of protection of the present invention.

Claims

1. An automatic descaling hydroelectric generator, comprising a housing, an impeller, a stator and a rotor, wherein the stator is mounted inside the housing, and characterized in that: The impeller shaft of the impeller is both axially movable and rotatably connected to a shaft sleeve. When water enters the water inlet end of the housing, the impeller is impacted to drive the impeller shaft to move axially to scrape off scale between the impeller shaft and the shaft sleeve.

2. The automatic descaling hydraulic generator according to claim 1, characterized in that: The shaft sleeve has a hollow structure inside and an open end. The impeller shaft extends from the open end. A space for the rotor to rotate is provided inside the shaft sleeve.

3. The automatic descaling hydraulic generator according to claim 2, characterized in that: An elastic driving mechanism for driving the impeller shaft to axially reset is arranged in the shaft sleeve.

4. The automatic descaling hydraulic generator according to claim 3, characterized in that: The elastic driving mechanism includes a spring and a steel ball. One end of the spring abuts against the inner wall of the shaft sleeve, and the other end abuts against the steel ball. The steel ball abuts against the impeller shaft.

5. The automatic descaling hydraulic generator according to claim 1, characterized in that: The shaft sleeve is formed by splicing two parts.

6. The automatic descaling hydraulic generator according to claim 1, characterized in that: The shaft sleeve is tightly matched with the outer shell, and a sealing ring is provided between the shaft sleeve and the outer shell.

7. The automatic descaling hydraulic generator according to claim 4, characterized in that: The impeller shaft is provided with a limiting portion for limiting the axial extension length of the impeller shaft.

8. The automatic descaling hydraulic generator according to claim 7, characterized in that: The limiting portion is an integral structure with the impeller shaft or is fixed on the impeller shaft.

9. The automatic descaling hydraulic generator according to claim 1, characterized in that: The water inlet end of the casing is arranged toward the end face of the impeller, or the water inlet end of the casing is arranged toward the side face of the impeller.

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