Open type deep well pump

Abstract

The utility model discloses an open type deep-well pump which comprises a motor part and a hydraulic part. The bottom of the motor shell is of an open structure. The middle flange and the lower flange are fixedly connected with the upper end and the lower end of the motor shell respectively, and the motor stator coil is fixedly installed in the motor shell. The lower end of the motor hollow shaft is of an open structure; the motor hollow shaft penetrates through the inner ring of the motor stator coil, the motor rotor magnetic steel is fixed on the outer surface of the motor hollow shaft, and the position of the motor rotor magnetic steel is opposite to the position of the motor stator coil; a motor lower bearing and a motor upper bearing are respectively fixed in the lower flange and the middle flange, and inner rings of the motor lower bearing and the motor upper bearing are respectively matched with the outer surfaces of the lower end and the upper end of the motor hollow shaft and have gaps; the hydraulic part is connected with the motor part through a middle flange. The power of the motor can be improved, the deep well application requirement is met, and the water conservancy efficiency can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of deep well pumps, in particular to an open deep well pump. Background Art

[0002] Current deep-well pumps typically feature a solid motor connected to the pump body by a coupling. Water enters the pump body at the coupling and is then pushed out by the impeller within the pump body before exiting the pump body. However, the motor seal structure struggles to dissipate heat, limiting motor power and hindering high-power applications. Furthermore, an airbag is required within the motor seal to accommodate pressure differences downhole, but this airbag's pressure adjustment capability is limited. Currently, it can only meet the requirements for wells up to 600 meters deep and cannot meet the requirements for deeper wells. Utility Model Content

[0003] In view of the deficiencies in the prior art, the utility model aims to provide an open deep well pump.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] The cam is secured to the upper and lower ends of the motor housing and is secured to the upper and lower ends of the motor housing. The cam is secured to the lower ends of the motor housing and is in a secure position relative to the upper ends of the motor housing.

[0006] Furthermore, the hydraulic part includes a hydraulic housing, a water outlet flange, a driving wheel, an impeller shaft, an impeller assembly, a water outlet guide vane, an upper flange, a lower bearing of the impeller shaft and an upper bearing of the impeller shaft; the bottom of the hydraulic housing is connected to the upper part of the middle flange; the upper flange is connected to the upper part of the inner ring of the hydraulic housing, the impeller assembly includes a housing and a rotating impeller arranged in the housing, the housing of the impeller assembly and the inner ring of the hydraulic housing are clearance-matched, the water outlet guide vane is located between the upper flange and the top end face of the housing of the impeller assembly, the upper flange exerts downward pressure on the water outlet guide vane and the impeller assembly, the bottom end face of the housing of the impeller assembly is pressed tightly against the top end face of the middle flange, so that the housing of the impeller assembly is fixed; the inner ring of the rotating impeller of the impeller assembly is fixedly sleeved on the outer surface of the impeller shaft and can rotate together with the impeller shaft;

[0007] The bottom of the impeller shaft is fixedly connected to the driving wheel, the outer ring of the driving wheel cooperates with the inner ring of the lower bearing of the impeller shaft with a gap, and the top of the impeller shaft cooperates with the inner ring of the upper bearing of the impeller shaft with a gap; the outer ring of the lower bearing of the impeller shaft is fixed to the inside of the middle flange, the outer ring of the upper bearing of the impeller shaft is fixed to the inside of the upper flange, and the driving wheel is connected to the upper end of the hollow shaft of the motor;

[0008] The bottom of the water outlet flange is fixedly connected to the upper end of the hydraulic shell.

[0009] Furthermore, the power line of the motor part is exposed from the water outlet flange.

[0010] Furthermore, an intermediate water inlet filter is provided between the hydraulic shell and the intermediate flange, and the upper end and the lower end of the intermediate water inlet filter are fixedly connected to the lower end of the hydraulic shell and the upper end of the intermediate flange respectively.

[0011] Furthermore, a bottom water inlet filter is provided at the bottom of the lower flange.

[0012] Furthermore, the surfaces of the motor stator coil and the motor rotor magnetic steel are respectively covered with epoxy resin layers.

[0013] The beneficial effects of the present invention are:

[0014] 1. The motor part of this utility model is set as a hollow structure. After water enters the motor part, it can directly cool the motor and increase the power of the motor;

[0015] 2. The motor part of this utility model is set as a hollow structure, and water can pass through the motor part directly, thereby eliminating the pressure difference between the inside and outside of the motor part, which is suitable for deep well application requirements;

[0016] 3. In the present invention, water can not only enter from the middle of the motor part and the hydraulic part, but also from the bottom of the motor part, which helps to improve the water efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the external structure of an open deep well pump in an embodiment of the present utility model;

[0018] Figure 2 This is a schematic cross-sectional view of the internal structure of an open deep well pump in an embodiment of the present utility model. DETAILED DESCRIPTION

[0019] The present invention will be further described below in conjunction with the accompanying drawings. It should be noted that this embodiment is based on the technical solution and provides a detailed implementation method and specific operation process, but the protection scope of the present invention is not limited to this embodiment.

[0020] This embodiment provides an open deep well pump, such as Figure 1-2 As shown, it includes a motor part and a hydraulic part; the motor part includes a motor stator and a motor rotor.

[0021] The motor stator includes a motor housing 3, a motor stator coil 11, a lower flange 2 and an intermediate flange 4; the bottom of the motor housing 3 is an open structure; the intermediate flange 4 and the lower flange 2 are respectively fixedly connected to the upper and lower ends of the motor housing 3 by threads, and the motor stator coil 11 is fixedly installed inside the motor housing 3 by interference fit.

[0022] The motor rotor includes a motor hollow shaft 9, a motor rotor magnet 10, a motor lower bearing 8 and a motor upper bearing 12; the lower end of the motor hollow shaft 9 is an open structure; the motor hollow shaft 9 passes through the inner ring of the motor stator coil 11, and the motor rotor magnet 10 is glued to the outer surface of the motor hollow shaft 9 and the position of the motor rotor magnet 10 is opposite to the position of the motor stator coil 11; the motor lower bearing 8 and the motor upper bearing 12 are respectively interference fit inside the lower flange 2 and the middle flange 4, and the inner rings of the motor lower bearing 8 and the motor upper bearing 12 are respectively matched with the outer surfaces of the lower end and the upper end of the motor hollow shaft 9 and have a gap, and the motor hollow shaft 9 can rotate freely with the inner rings of the motor lower bearing 8 and the motor upper bearing 12.

[0023] Through the above structure, after the motor stator coil 11 is energized, the motor hollow shaft 9 can rotate under the action of the motor rotor magnetic steel 10.

[0024] The hydraulic section is integrated with the lower motor section via the intermediate flange 4. The hydraulic section includes a hydraulic housing 6, a water outlet flange 7, a drive wheel 13, an impeller shaft 14, an impeller assembly 15, a water outlet guide vane 16, an upper flange 17, an impeller shaft lower bearing 18, and an impeller shaft upper bearing 19.

[0025] The bottom of the hydraulic shell 6 is connected to the upper part of the middle flange 4, and the top of the hydraulic shell 6 is fixedly connected to the upper flange 17 by threads, forming the main support structure of the hydraulic part;

[0026] The upper flange 17 is threadedly connected to the upper part of the inner ring of the hydraulic housing 6. The impeller assembly 15 (the impeller assembly can be one or more) includes a housing and a rotating impeller arranged in the housing. The outer ring of the housing of the impeller assembly 15 is clearance-matched with the inner ring of the hydraulic housing 6. The water outlet guide vane 16 is located between the upper flange 17 and the top end surface of the housing of the impeller assembly 15 (if multiple impeller assemblies 15 are included, it is the top end surface of the housing of the uppermost impeller assembly 15). The upper flange 17 exerts downward pressure on the water outlet guide vane 16 and the impeller assembly 15. The bottom end surface of the housing of the impeller assembly 15 (if multiple impeller assemblies 15 are included, it is the bottom end surface of the housing of the lowermost impeller assembly) is pressed tightly against the top end surface of the intermediate flange 4, so that the housing of the impeller assembly 15 is fixed; the inner ring of the rotating impeller of the impeller assembly 15 is fixedly sleeved on the outer surface of the impeller shaft 14 through a hexagonal hole structure and can rotate together with the impeller shaft 14.

[0027] The bottom of the impeller shaft 14 is fixedly connected to the hexagonal hole of the drive wheel 13. The outer ring of the drive wheel 13 fits with the inner ring of the lower impeller shaft bearing 18, with a clearance. The top of the impeller shaft 14 fits with the inner ring of the upper impeller shaft bearing 19, with a clearance. This allows the impeller shaft 14 to rotate freely, supported by the upper and lower impeller shaft bearings 19 and 18. The outer ring of the lower impeller shaft bearing 18 is fitted with an interference fit inside the intermediate flange 4, while the outer ring of the upper impeller shaft bearing 19 is fitted with an interference fit inside the upper flange 17. The drive wheel 13 is connected to the upper end of the motor hollow shaft 9 via a male-female (concave-convex) fitting mechanism. This allows the rotation of the motor hollow shaft 9 to simultaneously drive the rotation of the drive wheel 13, which in turn drives the impeller shaft 14 to rotate together.

[0028] The outlet flange 7 serves as an interface between the deep well pump and the user pipeline, and its bottom is fixedly connected to the upper end of the hydraulic housing 6 by threads.

[0029] In this embodiment, the surfaces of the motor stator coil 11 and the motor rotor magnet 10 are respectively covered with an epoxy resin layer. By pouring epoxy resin onto the surfaces of the motor stator coil 11 and the motor rotor magnet 10, the epoxy resin layer is formed to cover the motor stator coil 11 and the motor rotor magnet 10, thereby providing insulation when water enters between the motor stator coil 11 and the motor rotor magnet 10.

[0030] In this embodiment, the power line 20 of the motor part is exposed from the water outlet flange 7.

[0031] In this embodiment, a bottom water inlet filter 1 is provided at the bottom of the lower flange 2 .

[0032] Furthermore, in this embodiment, an intermediate water inlet filter 5 is provided between the hydraulic shell 6 and the intermediate flange 4, and the upper and lower ends of the intermediate water inlet filter 5 are respectively threadedly fixedly connected to the lower end of the hydraulic shell 6 and the upper end of the intermediate flange 4.

[0033] Impurities in the bottom water inlet and the middle water inlet can be filtered through the bottom water inlet filter 1 and the middle water inlet filter 5.

[0034] In this embodiment, the driving wheel adopts a hollow structure or a solid structure.

[0035] When the open deep-well pump is in operation, the motor stator is energized, generating a rotating magnetic field that drives the motor's hollow shaft to rotate, which in turn drives the drive wheel, thereby driving the impeller shaft. The impeller shaft drives the rotating impeller of the impeller assembly to rotate. Under the centrifugal force of the rotating impeller, water is lifted upward from the bottom or middle of the motor section, passing through the outlet guide vanes to the outlet flange, where it is gradually lifted upward along the user's pipes. When water enters the motor section through the bottom water inlet filter 1, it can directly enter the motor's hollow shaft, cooling it. It can then pass through the gap between the motor hollow shaft 9 and the motor's lower bearing 8, entering the space between the motor rotor and stator, further cooling the stator. The water flow between the motor rotor and stator continues upward through the gap between the motor hollow shaft 9 and the motor's upper bearing 12, and between the outer ring of the drive wheel 13 and the impeller shaft's lower bearing 18, entering the hydraulic section. Water can also enter the hydraulic section directly through the middle water inlet filter 5.

[0036] When the drive wheel is hollow, the water flowing into the hollow motor shaft can continue to rise through the drive wheel under the suction of the impeller assembly, reach the bottom of the impeller assembly, and enter the hydraulic section. When the drive wheel is solid, the water flowing into the hollow motor shaft will not continue to rise when it hits the solid drive wheel, and will form a vortex inside the hollow motor shaft. The two drive wheel structures can be selectively adopted according to different applications.

[0037] Those skilled in the art can make various corresponding changes and modifications based on the above technical solutions and concepts, and all of these changes and modifications should be included in the scope of protection of the claims of this utility model.

Claims

1. An open deep well pump, comprising a motor part and a hydraulic part; characterized in that: The motor part includes a motor stator and a motor rotor; the motor stator includes a motor housing, a motor stator coil, a lower flange and an intermediate flange; the bottom of the motor housing is an open structure; the intermediate flange and the lower flange are fixedly connected to the upper and lower ends of the motor housing respectively, and the motor stator coil is fixedly installed inside the motor housing; the motor rotor includes a motor hollow shaft, a motor rotor magnet, a motor lower bearing and a motor upper bearing; the lower end of the motor hollow shaft is an open structure; the motor hollow shaft passes through the inner ring of the motor stator coil, the motor rotor magnet is fixed to the outer surface of the motor hollow shaft and the position of the motor rotor magnet is opposite to the position of the motor stator coil; the motor lower bearing and the motor upper bearing are fixed inside the lower flange and the intermediate flange respectively, and the inner rings of the motor lower bearing and the motor upper bearing are respectively matched with the outer surfaces of the lower end and upper end of the motor hollow shaft and have a gap; the hydraulic part is connected to the motor part through the intermediate flange.

2. The open deep well pump according to claim 1, characterized in that The hydraulic part includes a hydraulic shell, a water outlet flange, a driving wheel, an impeller shaft, an impeller assembly, a water outlet guide vane, an upper flange, a lower bearing of the impeller shaft and an upper bearing of the impeller shaft; the bottom of the hydraulic shell is connected to the upper part of the middle flange; the upper flange is connected to the upper part of the inner ring of the hydraulic shell, the impeller assembly includes a shell and a rotating impeller arranged in the shell, the shell of the impeller assembly and the inner ring of the hydraulic shell are clearance-matched, the water outlet guide vane is located between the upper flange and the top end face of the shell of the impeller assembly, the upper flange exerts downward pressure on the water outlet guide vane and the impeller assembly, the bottom end face of the shell of the impeller assembly is pressed tightly against the top end face of the middle flange, so that the shell of the impeller assembly is fixed; the inner ring of the rotating impeller of the impeller assembly is fixedly sleeved on the outer surface of the impeller shaft and can rotate with the impeller shaft; The bottom of the impeller shaft is fixedly connected to the driving wheel, the outer ring of the driving wheel cooperates with the inner ring of the lower bearing of the impeller shaft with a gap, and the top of the impeller shaft cooperates with the inner ring of the upper bearing of the impeller shaft with a gap; the outer ring of the lower bearing of the impeller shaft is fixed to the inside of the middle flange, the outer ring of the upper bearing of the impeller shaft is fixed to the inside of the upper flange, and the driving wheel is connected to the upper end of the hollow shaft of the motor; The bottom of the water outlet flange is fixedly connected to the upper end of the hydraulic shell.

3. The open deep well pump according to claim 2, characterized in that: The power line of the motor part is exposed from the water outlet flange.

4. The open deep well pump according to claim 2, characterized in that: An intermediate water inlet filter is provided between the hydraulic shell and the intermediate flange, and the upper end and the lower end of the intermediate water inlet filter are fixedly connected to the lower end of the hydraulic shell and the upper end of the intermediate flange respectively.

5. The open deep well pump according to claim 1, characterized in that: A bottom water inlet filter is provided at the bottom of the lower flange.

6. The open deep well pump according to claim 1, characterized in that The surfaces of the motor stator coil and the motor rotor magnetic steel are respectively covered with epoxy resin layers.

Images