Submersible motor

Abstract

The invention relates to a submersible motor, belongs to the technical field of submersible pumps, and aims to solve the problems that a bag storage barrel and a motor barrel of a submersible pump with an adjusting bag on the side surface are both circular barrels and are not compact in structure, the submersible motor comprises a shell, a motor assembly and the adjusting bag, the shell comprises the motor barrel and the bag storage barrel, and the bag storage barrel is a barrel body with an opening in the lower end; the adjusting bag is installed in the bag storage barrel and is fixedly sealed through the pressing plate and the clamping spring, the motor assembly is arranged on the motor barrel, a communicating hole is formed in the barrel wall between the bag storage barrel and the motor barrel, the cross section of the bag storage barrel is square or oval or crescent or trapezoid, and the adjusting bag, the pressing plate and the clamping spring are matched with the bag storage barrel in shape. The bag storage barrel is arranged around the motor barrel, and the shape of the bag storage barrel is optimized, so that the shell is compact in structure, firm, attractive and low in cost.

Description

Technical Field

[0001] The invention relates to a submersible motor and belongs to the technical field of submersible pumps. Background Art

[0002] At present, it is widely used in liquid lifting, but traditional submersible pumps are generally not equipped with a pressure regulating structure. When the motor is running, the internal temperature change will cause the oil or gas to expand and contract. The pressure generated by the external water level can easily cause damage to the seals or rupture of the shell, seriously affecting the service life of the equipment. Some oil-filled submersible pumps are equipped with regulating capsules. The water pumps meet the needs of some applications. Different applications require more types of water pumps with regulating capsules.

[0003] Utility model patent publication number CN203978864U discloses a submersible pump with a side-mounted regulating bladder. This submersible pump overcomes pressure fluctuations by elastically deforming the bladder, essentially solving the aforementioned technical problems. However, the regulating bladder housing and the inner cavity of the motor barrel of this submersible pump are both cylindrical. When arranged side by side, the regulating bladder housing and the motor barrel are connected only at one tangential end, resulting in wasted space at the connection. Furthermore, the regulating bladder housing and the motor barrel must be kept sufficiently apart, resulting in an oversized submersible pump housing that lacks compactness, strength, and aesthetics. Summary of the Invention

[0004] The present invention is developed to provide a submersible motor that addresses the oversized dimensions of submersible pumps with regulating bladders. A brief overview of the invention is provided below to provide a basic understanding of certain aspects of the invention. It should be understood that this overview is not an exhaustive overview of the invention. It is not intended to identify key or important aspects of the invention, nor is it intended to limit the scope of the invention.

[0005] The technical solution of the present invention:

[0006] A submersible motor comprises a housing, a motor assembly and an adjusting capsule. The housing comprises a motor tube and a capsule storage tube. The capsule storage tube is a cylinder with an opening at the lower end. The adjusting capsule is installed in the capsule storage tube and is fixed and sealed by a pressure plate and a retaining spring. The motor assembly is arranged on the motor tube. A connecting hole is provided on the tube wall between the capsule storage tube and the motor tube. The cross-section of the capsule storage tube is square, elliptical, crescent-shaped or trapezoidal.

[0007] Furthermore, a wiring cavity is formed between the regulating capsule and the top wall of the storage tube, a capacitor is provided in the wiring cavity, a wire entry hole is opened on the top wall of the storage tube, a wire threading hole is provided on the tube wall between the storage tube and the motor tube, the lead wire of the motor assembly passes through the wire threading hole and is connected to the capacitor, and the power line passes through the wire entry hole and is connected to the capacitor.

[0008] Furthermore, the shell is a casting component, and the wire inlet hole is opened on the casting protrusion on the top wall of the storage tube, and the casting protrusion is connected to the motor tube.

[0009] Furthermore, the upper end cover closes the upper opening of the motor barrel, and the lower end cover closes the lower opening of the motor barrel. Both the upper end cover and the lower end cover are provided with bearing seats. The motor assembly includes a motor shaft, a stator and a rotor. The motor shaft rotates with the two bearing seats respectively. The upper end of the motor shaft passes through the upper end cover, or the lower end of the motor shaft passes through the lower end cover. The rotor is installed on the motor shaft, and the stator is installed on the inner wall of the motor barrel.

[0010] Furthermore, the lower end cover is detachably mounted on the lower end of the motor barrel, and the upper end cover is detachably mounted on the upper end of the motor barrel;

[0011] Alternatively, the motor barrel and the upper end cover are integrally formed, and the lower end cover is detachably mounted on the lower end of the motor barrel;

[0012] Alternatively, the motor barrel and the lower end cover are integrally formed, and the upper end cover is detachably mounted on the upper end of the motor barrel.

[0013] Furthermore, a lifting ring is provided on the upper end cover.

[0014] Furthermore, the cross-sectional shape of the storage capsule is adapted to the cross-sectional shape of the regulating capsule.

[0015] The present invention has the following beneficial effects:

[0016] 1. The motor barrel and the upper and lower end covers of the present invention can be selected in a dual mode of "integrated processing and molding" or "detachable installation" according to the working conditions. When the "integrated processing and molding" mode is selected, the structure is compact, the assembly gap between the end cover and the barrel is eliminated, the processing is reduced, the barrel assembly is convenient to replace, the maintenance time is greatly shortened, and it is adapted to multiple assembly requirements; when the "detachable installation" mode is selected, it is convenient for maintenance personnel to directly contact the motor, and the motor barrel structure is flexible.

[0017] 2. The cross-section of the capsule tube of the present invention can be selected from various shapes such as square, oval, crescent, trapezoidal, etc., and the shapes of the adjustment bag, pressure plate and retaining spring match the capsule tube. The capsule tube is designed around the motor tube to be compact, strong, beautiful and cost-effective.

[0018] 3. The present invention reserves a wire threading hole on the top wall of the capsule tube, so that the electrical circuit of the motor assembly can be directly led out through a fixed path, avoiding damage to the sealing structure by traditional wiring methods. At the same time, it is convenient to connect with different control systems and improve the adaptability of the equipment in automated and intelligent scenarios.

[0019] 4. The present invention solves the problems of single assembly form and inconvenient maintenance of traditional submersible pumps, and significantly broadens the adaptability of the equipment in multiple working conditions in industry, agriculture, municipal administration and other fields.

[0020] 5. The "pump cap" of the existing submersible pump with the pump head located at the lower end is eliminated, which reduces the cost and solves the problem that the pump cap and the upper end cover are not interchangeable. The regulating capsule can adjust the internal pressure of the motor barrel and extend the service life of the motor. In terms of cost, service life, repair and replacement parts, the present invention is superior to the motor of the mainstream submersible pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the present invention in which the upper end cover and the lower end cover are both detachably connected;

[0022] Figure 2 This is a schematic diagram of the present invention in which the upper end cover and the motor barrel are integrally formed and the lower end cover is detachably connected;

[0023] Figure 3 This is a schematic diagram of the present invention in which the lower end cover and the motor barrel are integrally formed and the upper end cover is detachably connected;

[0024] Figure 4 This is a schematic diagram of the capsule tube being crescent-shaped;

[0025] Figure 5 is a schematic diagram when the capsule tube is oval;

[0026] Figure 6 This is a schematic diagram of a case where the capsule tube is square;

[0027] Figure 7 It is a schematic diagram when the capsule tube is trapezoidal;

[0028] Figure 8 It is a schematic diagram showing the wasted space between the reservoir tube of an existing submersible pump with a regulating bladder and the motor tube;

[0029] Figure 9 The present invention is a schematic diagram of a casting groove formed between a casting projection of an existing submersible pump with an adjusting bag and a motor barrel.

[0030] In the figure, 1-motor assembly, 11-motor shaft, 12-stator, 13-rotor, 2-motor cylinder, 21-threading hole, 22-bearing seat, 3-storage cylinder, 31-wire inlet hole, 32-capacitor, 33-casting bump, 34-wasted space, 35-casting groove, 4-adjusting capsule, 5-upper end cover, 6-lower end cover, 7-pressure plate, 8-circlip, 9-lifting ring. DETAILED DESCRIPTION

[0031] To make the objectives, technical solutions, and advantages of the present invention more clearly apparent, the present invention is described below using specific embodiments shown in the accompanying drawings. However, it should be understood that these descriptions are merely illustrative and are not intended to limit the scope of the present invention. In addition, in the following description, descriptions of well-known structures and technologies are omitted to avoid unnecessary confusion of the concepts of the present invention.

[0032] The connections mentioned in the present invention are divided into fixed connections and detachable connections. The fixed connection refers to a non-detachable connection, including but not limited to conventional fixed connection methods such as hem connection, rivet connection, adhesive connection, and welding connection. The detachable connection refers to but not limited to conventional detachable connection methods such as threaded connection, snap connection, pin connection, and hinge connection. When the specific connection method is not clearly specified, it is assumed that at least one connection method can always be found among the existing connection methods to achieve the function. Those skilled in the art can choose according to their needs. For example, a welded connection is selected for a fixed connection, and a hinge connection is selected for a detachable connection.

[0033] Example: Figures 1-9 As shown, a submersible motor includes a shell, a motor assembly 1 and an adjusting capsule 4. The shell includes a motor tube 2 and a storage tube 3. The storage tube 3 is a cylinder with an opening at the lower end. The adjusting capsule 4 is installed in the storage tube 3 and is fixed and sealed by a pressure plate 7 and a retaining spring 8. The motor assembly 1 is arranged on the motor tube 2. A connecting hole is provided on the tube wall between the storage tube 3 and the motor tube 2. The cross-sectional shape of the storage tube 3 is square, elliptical, crescent or trapezoidal.

[0034] The submersible motor of the present invention is mainly used for underwater operations. When combined with a pump head and an impeller, it can be used as a submersible pump. It can also be used as a driving device for other underwater scenes. It is an improvement made by the applicant based on the invention with publication number CN203978864U. Figure 8 A top-down connection diagram of the regulating capsule housing and the motor barrel of the invention with announcement number CN203978864U is given, which is equivalent to the connection form of the motor barrel 2 and the storage barrel 3 in the present application. Since the motor barrel 2 and the storage barrel 3 both have cylindrical inner cavities, the motor barrel 2 and the storage barrel 3 are arranged almost tangentially, leaving wasted space 34 on both sides of the connection. At the same time, in order to ensure that the regulating capsule 4 has a sufficient size, the storage barrel 3 with a cylindrical inner cavity must be farther away from the motor barrel 2, resulting in the submersible pump housing being too large and the casting production being more prone to defects. The present invention improves the shape of the capsule tube 3 into a square, elliptical, crescent or trapezoidal shape. Under the premise of maintaining sufficient deformation size of the adjustment capsule 4, the square, elliptical, crescent or trapezoidal capsule tube 3 can better fit around the motor tube 2 than the capsule tube 3 with a circular cross-section, avoiding wasted space 34 between the motor tube 2 and the capsule tube 3. At the same time, the protruding distance of the capsule tube 3 relative to the motor tube 2 is reduced, and the size of the outer shell is reduced, thereby reducing casting defects, facilitating processing, and having a more beautiful appearance.

[0035] A wiring cavity is formed between the regulating capsule 4 and the top wall of the reservoir tube 3. A capacitor 32 is housed within the wiring cavity. A wire entry hole 31 is provided in the top wall of the reservoir tube 3. A wire threading hole 21 is provided in the wall between the reservoir tube 3 and the motor tube 2. The lead wires of the motor assembly 1 pass through the threading hole 21 and connect to the capacitor 32. The power cord passes through the wire entry hole 31 and connects to the capacitor 32. The wiring cavity is formed in the upper portion of the reservoir tube 3, so that it is located to one side of the motor tube 2, thereby reducing the height of the motor tube 2.

[0036] The housing is a casting component, and the wire inlet hole 31 is opened on the casting protrusion 33 on the top wall of the storage tube 3, and the casting protrusion 33 is connected to the motor tube 2.

[0037] Since a wire seal is required at the wire inlet hole 31 to ensure that the wire remains sealed when passing through and to prevent liquid from seeping into the motor cavity, a casting protrusion 33 is cast on the top wall of the storage tube 3 to increase the thickness of the top wall of the storage tube 3. Figure 9 A top view of the invention with publication number CN203978864U is provided. In this patent, the casting projection 33 is located at the center of the top wall of the reservoir tube 3, with a casting groove 35 between it and the motor tube 2, allowing for upward and downward demolding during casting. However, several horizontal reinforcing ribs are provided between the reservoir tube 3 and the motor tube 2, making upward and downward demolding impossible and causing production inconvenience. The present invention relocates the casting projection 33 so that it is connected to the motor tube 2, eliminating the casting groove 35 between the casting projection 33 and the motor tube 2, thus avoiding the production inconvenience.

[0038] The upper end cover 5 closes the upper opening of the motor barrel 2, and the lower end cover 6 closes the lower opening of the motor barrel 2. Both the upper end cover 5 and the lower end cover 6 are provided with bearing seats 22. The motor assembly 1 includes a motor shaft 11, a stator 12 and a rotor 13. The motor shaft 11 rotates with the two bearing seats 22 respectively. The upper end of the motor shaft 11 passes through the upper end cover 5, or the lower end of the motor shaft 11 passes through the lower end cover 6. The rotor 13 is installed on the motor shaft 11, and the stator 12 is installed on the inner wall of the motor barrel 2.

[0039] The lower end cover 6 is detachably mounted on the lower end of the motor barrel 2, and the upper end cover 5 is detachably mounted on the upper end of the motor barrel 2;

[0040] Alternatively, the motor barrel 2 and the upper end cover 5 are integrally formed, and the lower end cover 6 is detachably mounted on the lower end of the motor barrel 2;

[0041] Alternatively, the motor barrel 2 and the lower end cover 6 are integrally formed, and the upper end cover 5 is detachably mounted on the upper end of the motor barrel 2 .

[0042] Integrating the upper end cover 5 or the lower end cover 6 with the motor barrel 2 can prevent water from entering, making replacement and maintenance more convenient. Passing the motor shaft 11 through the upper end cover 5 or the lower end cover 6 can also meet more usage needs.

[0043] A lifting ring 9 is provided on the upper end cover 5 .

[0044] The cross-sectional shape of the bag storage tube 3 is adapted to the cross-sectional shape of the regulating bag 4 .

[0045] A sealing structure is provided between the motor shaft 11 and the side wall through which the motor barrel 2 passes, which may be a water seal and an oil seal, and is made of silicon carbide or fluororubber to adapt to high speed and corrosive medium environments.

[0046] After the power is turned on, the stator 12 is energized to generate a rotating magnetic field, driving the rotor 13 to rotate at high speed. When the motor assembly 1 is running, the pressure inside the motor barrel 2 increases due to the increase in temperature. The pressure is transmitted to the regulating capsule 4 through the connecting port, pushing the regulating capsule 4 to expand outward; when the temperature drops, the regulating capsule 4 elastically contracts, pressing the gas back into the motor barrel 2, maintaining the pressure balance inside the motor barrel 2, and preventing the seal from being damaged by pressure fluctuations.

[0047] The motor barrel and the upper and lower end covers of the present invention can select the dual modes of "integrated processing and molding" or "detachable installation" according to the working conditions. When the "integrated processing and molding" mode is selected, the structure is compact, the assembly gap between the end cover and the barrel is eliminated, the processing is reduced, the barrel assembly is convenient to replace, the maintenance time is greatly shortened, and it is adapted to multiple assembly needs; when the "detachable installation" mode is selected, it is convenient for maintenance personnel to directly contact the motor, and the motor barrel structure is flexible.

[0048] The cross-section of the reservoir tube 3 of the present invention can be selected from a variety of shapes, including square, oval, crescent, and trapezoidal. The shapes of the adjustment capsule 4, pressure plate 7, and retaining spring 8 are designed to match the reservoir tube 3. The reservoir tube 3, surrounding the motor tube, is compact, sturdy, aesthetically pleasing, and cost-effective. A wire entry hole 31 is provided on the upper wall of the reservoir cavity 3, allowing the electrical wiring of the motor assembly 1 to be directly routed through a fixed path, avoiding damage to the sealing structure caused by traditional wiring methods. This also facilitates integration with various control systems, enhancing the device's adaptability in automated and intelligent scenarios.

[0049] The present invention solves the problems of single assembly form and inconvenient maintenance of traditional submersible pumps, and significantly broadens the adaptability of the equipment to working conditions in multiple fields such as industry, agriculture, and municipal administration.

[0050] The "pump cap" of the existing submersible pump with the pump head located at the lower end is eliminated, which reduces costs and solves the problem that the pump cap and the upper end cover are not compatible. The regulating capsule can adjust the internal pressure of the motor barrel and extend the service life of the motor. In terms of cost, service life, repair and replacement parts, the present invention is superior to the motor of the mainstream submersible pump.

[0051] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A submersible motor comprising a housing, a motor assembly (1) and an adjusting capsule (4), wherein the housing comprises a motor cylinder (2) and a capsule cylinder (3), the capsule cylinder (3) being a cylinder with an opening at the lower end, the adjusting capsule (4) being installed in the capsule cylinder (3) and being fixed and sealed by a pressure plate (7) and a retaining spring (8), the motor assembly (1) being arranged on the motor cylinder (2), and a communicating hole being provided on the cylinder wall between the capsule cylinder (3) and the motor cylinder (2), characterized in that: The cross-sectional shape of the capsule cylinder (3) is square, elliptical, crescent-shaped or trapezoidal.

2. A submersible motor according to claim 1, characterized in that: A wiring cavity is formed between the regulating capsule (4) and the top wall of the capsule tube (3), wherein a capacitor (32) is provided in the wiring cavity. A wire entry hole (31) is provided on the top wall of the capsule tube (3), and a wire threading hole (21) is provided on the wall between the capsule tube (3) and the motor tube (2). The lead wire of the motor assembly (1) passes through the wire threading hole (21) and is connected to the capacitor (32), and the power line passes through the wire entry hole (31) and is connected to the capacitor (32).

3. A submersible motor according to claim 2, characterized in that: The housing is a casting component, and the wire inlet hole (31) is opened on a casting protrusion (33) on the top wall of the storage tube (3), and the casting protrusion (33) is connected to the motor tube (2).

4. A submersible motor according to claim 1, characterized in that: The upper end cover (5) closes the upper opening of the motor barrel (2), and the lower end cover (6) closes the lower opening of the motor barrel (2). The upper end cover (5) and the lower end cover (6) are both provided with bearing seats (22). The motor assembly (1) comprises a motor shaft (11), a stator (12) and a rotor (13). The motor shaft (11) is rotatably engaged with the two bearing seats (22) respectively. The upper end of the motor shaft (11) passes through the upper end cover (5), or the lower end of the motor shaft (11) passes through the lower end cover (6). The rotor (13) is mounted on the motor shaft (11), and the stator (12) is mounted on the inner wall of the motor barrel (2).

5. The submersible motor according to claim 1, characterized in that: The lower end cover (6) is detachably mounted on the lower end of the motor barrel (2), and the upper end cover (5) is detachably mounted on the upper end of the motor barrel (2); Alternatively, the motor barrel (2) and the upper end cover (5) are integrally formed, and the lower end cover (6) is detachably mounted on the lower end of the motor barrel (2); Alternatively, the motor barrel (2) and the lower end cover (6) are integrally formed, and the upper end cover (5) is detachably mounted on the upper end of the motor barrel (2).

6. The submersible motor according to claim 1, characterized in that: The upper end cover (5) is provided with a lifting ring (9).

7. A submersible motor according to any one of claims 1 to 6, characterized in that: The cross-sectional shape of the storage bag tube (3) is adapted to the cross-sectional shape of the regulating bag (4).

Images