Submersible electric pump with water-cooled self-circulation cooling

Abstract

The application discloses a submersible electric pump with water-cooling self-circulation cooling, which comprises a motor assembly and a water pump assembly. The motor assembly comprises a motor chamber. An inlet channel and a return channel are arranged between the water pump assembly and the motor chamber. The water pump assembly guides cooling water into the motor chamber through the inlet channel, and the cooling water is finally discharged from the motor chamber through the return channel via a stator and a rotor. A sand discharger is arranged in the lower end of the motor chamber. A first sand discharge port is arranged at the bottom of the motor chamber. The sand discharger has a conical sand discharge hopper, and a second sand discharge port is arranged at the lower end of the conical sand discharge hopper. The submersible electric pump can realize water-cooling self-circulation cooling and has good cooling effect. The submersible electric pump can realize automatic sand discharge, protect the motor assembly and has long service life.

Description

Technical Field

[0001] This invention belongs to the field of automatic cooling technology for submersible pumps, specifically, it relates to a submersible electric pump with water-cooled self-circulating cooling. Background Technology

[0002] Currently, submersible pumps are generally cooled by oil cooling or water cooling.

[0003] Oil cooling: The cooling effect is relatively limited. With increased operating time, the mechanical seal of the submersible pump will deteriorate and eventually fail, causing cooling oil to leak out. In this situation, not only will the submersible motor suffer short-circuit damage, but it will also pollute the well water, rendering drinking water unsafe and resulting in significant economic losses.

[0004] Water cooling: The cooling effect is relatively poor, suitable for smaller power water pumps, but ineffective for high-power submersible motors with high heat dissipation requirements. Currently, water cooling structures are closed-loop, and the high temperatures generated during motor operation can cause the water inside the motor to vaporize and evaporate, ultimately damaging the motor.

[0005] For example, the patent CN114744816A, "A volute-type water pump motor housing with wind power for water cooling", achieves circulation through wind power, but it cannot be applied to the cooling of submersible pumps.

[0006] For example, the patent "water pump" with patent number CN104767325B can achieve self-circulating water cooling, but it simply cools the rotor shaft, and its cooling effect is very limited.

[0007] In summary, existing submersible electric pumps suffer from poor cooling performance, are prone to motor damage, have short lifespans, and are not economically viable. Summary of the Invention

[0008] In order to overcome the defects in the prior art, the present invention provides a submersible electric pump with water-cooled self-circulating cooling.

[0009] According to one aspect of the present invention, a submersible electric pump with water-cooled self-circulating cooling is provided, wherein the submersible electric pump body includes a motor assembly and a water pump assembly, the motor assembly including a motor chamber 11;

[0010] A water inlet channel 3 and a return channel 14 are provided between the water pump assembly and the motor chamber 11. The water pump assembly introduces cooling water into the motor chamber 11 through the water inlet channel 3, and then discharges the cooling water from the motor chamber 11 through the stator 12 and rotor 13.

[0011] A sand discharger 5 is provided in the motor chamber 11, and the sand discharger 5 is located at the lower end of the motor chamber 11; a first sand discharge port 111 is provided at the bottom of the motor chamber 11, the sand discharger 5 has a conical sand discharge hopper 51, and a second sand discharge port 52 is provided at the lower end of the conical sand discharge hopper 51.

[0012] According to a specific embodiment of the present invention, the water pump assembly includes an impeller pump chamber 21, and a water inlet channel 3 is provided between the impeller pump chamber 21 and the upper part of the motor chamber 11.

[0013] According to another specific embodiment of the present invention, the water inlet channel 3 is a water inlet conduit, which is disposed between the bottom of the impeller pump chamber 21 and the upper part of the motor chamber 11.

[0014] According to another specific embodiment of the present invention, the return channel 14 is disposed inside the motor shaft 15, the lower end of the motor shaft 15 is provided with a water inlet 141, and the upper end is provided with a drain outlet 142.

[0015] According to another specific embodiment of the present invention, a waterproof rotator 6 is provided at the bottom of the motor chamber 11.

[0016] According to another specific embodiment of the present invention, the waterproof rotator 6 includes a ring body 61 and a plurality of notches 62 evenly arranged on the circumference of the ring body 61, wherein the notches 62 are arc-shaped notches.

[0017] According to another specific embodiment of the present invention, a filter 7 is provided in the upper part of the motor chamber 11.

[0018] According to another specific embodiment of the present invention, the filter 7 is a coarse sand filter, which is disposed below the upper guide seat 16 of the motor chamber 11.

[0019] The present invention claims a submersible electric pump with water-cooled self-circulating cooling, which can achieve water-cooled self-circulating cooling with good cooling effect; it does not require major modifications to the original structure, is easy to modify and produce, saves costs and is easy to promote; it can also achieve automatic sand removal to protect the motor components; it has low cost and long service life. Attached Figure Description

[0020] Other features, objects, and advantages of the invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0021] Figure 1 The diagram shown is a structural schematic of a specific embodiment of a submersible electric pump with water-cooled self-circulating cooling provided by the present invention.

[0022] Figure 2The diagram shown is a structural schematic of a specific embodiment of the motor assembly in this invention;

[0023] Figure 3 The diagram shown is a structural schematic of a specific embodiment of the sand remover in this invention;

[0024] Figure 4 The diagram shown is a structural schematic of a specific embodiment of the waterproof rotator of the present invention;

[0025] Figure 5 The figure shown is a schematic diagram comparing the cooling effect curves in this invention.

[0026] The same or similar reference numerals in the accompanying drawings represent the same or similar parts.

[0027] Explanation of reference numerals in the attached figures:

[0028] Motor chamber 11; First sand discharge port 111; Stator 12; Rotor 13; Return channel 14; Water inlet 141; Water outlet 142; Motor shaft 15; Upper guide seat 16; Lower guide seat 17; Thrust plate 18; Impeller pump chamber 21; Impeller shaft 22; Impeller 23; Water inlet channel 3; Water passage 4; Sand discharger 5; Conical sand discharge hopper 51; Second sand discharge port 52; Waterproof rotator 6; Circular ring 61; Notch 62; Filter 7; Coupling 8; Connecting housing 9. Detailed Implementation

[0029] The following disclosure provides numerous different embodiments or examples for implementing various structures of the invention. To simplify the disclosure, components and arrangements of specific examples are described below. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. It should be noted that the components illustrated in the drawings are not necessarily drawn to scale. Descriptions of well-known components, processing techniques, and processes are omitted to avoid unnecessarily limiting the invention.

[0030] See Figure 1 and Figure 2 This invention provides a submersible electric pump with water-cooled self-circulating cooling. The submersible electric pump body includes a motor assembly and a water pump assembly. The motor assembly includes a motor chamber 11. The motor chamber 11 and the water pump assembly are connected by a connecting housing 9. A water inlet is provided at the connecting housing 9, through which the water pump assembly receives water. A water inlet channel 3 and a return channel 14 are provided between the water pump assembly and the motor chamber 11. The water pump assembly introduces cooling water into the motor chamber 11 through the water inlet channel 3, and then discharges the cooling water from the motor chamber 11 through the stator 12 and rotor 13, finally exiting the motor chamber 11 through the return channel 14, thus forming a water circulation.

[0031] See Figure 2 The water pump assembly includes an impeller pump chamber 21, and an inlet channel 3 is provided between the impeller pump chamber 21 and the upper part of the motor chamber 11. Cooling water enters through the inlet channel 3, flows through the water passage 4 between the stator 12 and the rotor 13 to the bottom of the motor chamber 11, and is finally discharged outward through the return channel 14.

[0032] The water inlet channel 3 is a water inlet conduit, which is located between the bottom of the impeller pump chamber 21 and the upper part of the motor chamber 11. The return channel 14 is located inside the motor shaft 15, and the lower end of the motor shaft 15 has a water inlet 141, and the upper end has a water outlet 142. The upper end of the motor shaft 15 is connected to the impeller shaft 22 through a coupling 8, and the impeller shaft 22 drives the impeller 23 in the impeller pump chamber 21 to perform work.

[0033] like Figure 3 As shown, a sand discharge mechanism is provided in the motor chamber 11. Preferably, the sand discharge mechanism is a sand discharger 5. The sand discharger 5 is located at the lower end of the motor chamber 11; a first sand discharge port 111 is provided on the lower guide seat 17 at the bottom of the motor chamber 11, and the sand discharger 5 has a conical sand discharge hopper 51. A second sand discharge port 52 is provided at the lower end of the conical sand discharge hopper 51.

[0034] A waterproof rotator 6 is provided at the bottom of the motor chamber 11. The waterproof rotator 6 includes a circular ring 61 and a plurality of notches 62 evenly arranged on the circumference of the circular ring 61, wherein the notches 62 are arc-shaped notches. See also Figure 3 and Figure 4 The waterproof rotator 6 is installed at the thrust plate 18. The waterproof rotator 6 can greatly reduce the rotation speed of the water flow at the bottom of the motor chamber 11, which facilitates the sedimentation of sand and gravel at the bottom of the motor chamber 11.

[0035] A filter 7 is provided in the upper part of the motor chamber 11, such as Figure 2 As shown. The filter 7 is a coarse sand filter, which is located below the upper guide seat 16 of the motor chamber 11. The filter 7 can effectively filter out larger and more numerous sand particles, preventing them from entering the stator 12 and rotor 13 areas. Since the filter 7 needs to be cleaned and replaced regularly, the ease of its cleaning and maintenance is also an important indicator of the submersible pump's performance. In this invention, the filter 7 can be cleaned and maintained simply by removing the upper guide seat 16 and other components, making it convenient and easy to operate.

[0036] The submersible pump provided by this invention utilizes the impeller 23 within the impeller pump chamber 21 to generate high water pressure. A large volume of water enters the motor chamber 11 through the inlet channel 3, where it is cooled by the stator 12 and rotor 13, and finally returned through the return channel 14, creating a self-circulating cooling system between the motor chamber 11 and the external water source. Furthermore, some of the cooling water entering the bottom of the motor chamber 11 carries the deposited sand and gravel out through the sand discharge port, achieving automatic sand removal. In other words, this invention allows most of the cooling water to be used for circulating cooling, with a small portion used for sand removal. Repeated research and experiments show that this invention has a very good cooling effect, such as... Figure 5 As shown.

[0037] While exemplary embodiments and their advantages have been described in detail, it should be understood that various changes, substitutions, and modifications can be made to these embodiments without departing from the spirit of the invention and the scope of protection defined by the appended claims. For other examples, those skilled in the art should readily understand that the order of process steps can be varied while remaining within the scope of the invention.

[0038] Furthermore, the scope of this invention is not limited to the processes, mechanisms, manufacturing methods, material compositions, means, methods, and steps of the specific embodiments described in the specification. From the disclosure of this invention, those skilled in the art will readily understand that any existing or future processes, mechanisms, manufacturing methods, material compositions, means, methods, or steps that perform substantially the same function or obtain substantially the same results as the corresponding embodiments described in this invention can be applied according to this invention. Therefore, the appended claims are intended to include these processes, mechanisms, manufacturing methods, material compositions, means, methods, or steps within their scope of protection.

Claims

1. A submersible electric pump with water-cooled self-circulating cooling, wherein, The submersible pump body includes a motor assembly and a water pump assembly, wherein the motor assembly includes a motor chamber (11); characterized in that, A water inlet channel (3) and a return channel (14) are provided between the water pump assembly and the motor chamber (11). The water pump assembly introduces cooling water into the motor chamber (11) through the water inlet channel (3), and then discharges the cooling water from the motor chamber (11) through the stator (12) and rotor (13). A sand discharger (5) is provided in the motor chamber (11), and the sand discharger (5) is located at the lower end of the motor chamber (11); a first sand discharge port (111) is provided at the bottom of the motor chamber (11), and the sand discharger (5) has a conical sand discharge hopper (51), and a second sand discharge port (52) is provided at the lower end of the conical sand discharge hopper (51); A waterproof rotator (6) is provided at the bottom of the motor chamber (11); A filter (7) is provided in the upper part of the motor chamber (11).

2. The submersible electric pump as described in claim 1, characterized in that, The water pump assembly includes an impeller pump chamber (21), and a water inlet channel (3) is provided between the upper part of the impeller pump chamber (21) and the motor chamber (11).

3. The submersible electric pump as described in claim 2, characterized in that, The water inlet channel (3) is a water inlet conduit, which is located between the bottom of the impeller pump chamber (21) and the upper part of the motor chamber (11).

4. The submersible electric pump as described in claim 1, characterized in that, The return channel (14) is located inside the motor shaft (15), and the lower end of the motor shaft (15) is provided with a water inlet (141) and the upper end is provided with a drain outlet (142).

5. The submersible electric pump as described in claim 1, characterized in that, The waterproof rotator (6) includes a ring (61) and a number of notches (62) evenly arranged on the circumference of the ring (61), wherein the notches (62) are arc-shaped notches.

6. The submersible electric pump as described in claim 1, characterized in that, The filter (7) is a coarse sand filter, which is located below the upper guide seat (16) of the motor chamber (11).

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