A deep well pump power motor

Abstract

The present invention discloses a deep well pump power motor, which relates to the technical field of deep well motors, and comprises a casing and a rotating shaft arranged in the casing; the end of the casing is connected to the water pump through a connecting seat, and the side of the connecting seat is provided with a plurality of seat grooves distributed at intervals along the circumference of the connecting seat; an interception net assembly is provided in each of the seat grooves, and a connecting cylinder is sleeved on the end of the rotating shaft, and the other end of the connecting cylinder is connected to the pump shaft of the water pump, and a centrifugal drive assembly is also provided on the connecting cylinder, and the centrifugal drive assembly can adjust the interception state of the interception net assembly based on the rotation speed of the rotating shaft. The motor can adjust the interception net assembly according to actual conditions, and has high flexibility.

Description

Technical Field

[0001] The present invention relates to the technical field of deep well motors, and in particular to a deep well pump power motor. Background Art

[0002] Deep well pumps are key equipment for extracting groundwater or liquids from deep wells and are widely used in agricultural irrigation, industrial water supply, mine drainage and other fields. Their core function is to drive the pump impeller to rotate through the motor-driven shaft to lift the liquid from the bottom of the well to the ground.

[0003] However, in a water quality environment with changing sediment content, traditional deep well pumps have long faced core technical bottlenecks such as the contradiction between filtration efficiency and operational stability, and poor sediment adaptability, which seriously restricts the reliability and life of the equipment under complex working conditions.

[0004] The interception net of traditional deep well pumps usually adopts a fixed mesh design. The mesh size is fixed when the equipment is manufactured and cannot be dynamically adjusted according to the actual operating conditions. This design has significant defects when dealing with water quality with fluctuating sediment content. Under low sediment conditions, too small a mesh will cause a significant increase in resistance when the fluid passes through, and the pump body will need to consume more energy to maintain flow, resulting in energy waste; under high sediment conditions, too large a mesh cannot effectively intercept coarse-grained sediment. After the sediment enters the pump body with the fluid, it will directly impact precision components such as bearings and mechanical seals, accelerating wear and even causing failures.

[0005] In addition, as the core component of deep well pumps, the reliability of mechanical seals directly affects the life of the equipment. However, traditional mechanical seals mostly adopt a single static ring-dynamic ring structure and lack effective wear compensation.

[0006] Therefore, it is necessary to provide a deep well pump power motor to solve the above problems. Summary of the Invention

[0007] In order to solve the above problems, the present invention provides the following technical solutions: a deep well pump power motor, comprising a casing and a rotating shaft arranged in the casing; the end of the casing is connected to the water pump through a connecting seat, and the side of the connecting seat is provided with a plurality of seat grooves distributed at intervals along the circumference of the connecting seat; an interception net assembly is provided in each of the seat grooves, and a connecting cylinder is sleeved on the end of the rotating shaft, and the other end of the connecting cylinder is connected to the pump shaft of the water pump, and a centrifugal drive assembly is also provided on the connecting cylinder, and the centrifugal drive assembly can adjust the interception state of the interception net assembly based on the rotation speed of the rotating shaft.

[0008] Preferably, the intercepting net assembly includes: a mesh plate, which is fixed in the seat groove and has a plurality of mesh holes; an adjusting bag, which is correspondingly embedded in each of the mesh holes, and in an unsupported state, the middle bag hole of the adjusting bag is in a contracted state; an adjusting plate, which is connected to one side of the mesh plate through a reset spring, and a support hole tube corresponding to the bag hole is fixed on the side of the adjusting plate close to the adjusting bag, and the side of the support hole tube has a side hole; the reset spring is configured to: drive the adjusting plate to have a tendency to move away from the mesh plate, and in the initial state of the reset spring, a gap is maintained between the support hole tube and the adjusting bag.

[0009] Preferably, the support hole tube is a trumpet-shaped structure, and the diameter of the support hole tube is set to be smaller at the end close to the mesh plate than at the end away from the mesh plate.

[0010] Preferably, the regulating capsule includes a capsule body, which is an annular hollow structure, wherein a plurality of first springs distributed in a circumferential array and a plurality of second springs distributed in a circumferential array are arranged in the hollow structure.

[0011] Preferably, the first spring is arranged close to the adjustment plate, and the second spring is arranged away from the adjustment plate; the first spring and the second spring are configured so that the sac hole is trumpet-shaped, and the end of the sac hole close to the adjustment plate is smaller than the end away from the adjustment plate.

[0012] Preferably, a plurality of arc-shaped plates distributed in a circumference are embedded in one end of the capsule close to the adjustment plate.

[0013] Preferably, a detector is also provided on one side of the casing for detecting the sediment content; when the sediment content is greater than a first threshold value, the rotation speed of the rotating shaft is reduced to a first speed range, and the first speed range is configured to: enable the centrifugal drive component to drive the interception net component to adjust to a state where the support hole tube and the first spring form a supporting fit; when the sediment content is greater than a second threshold value, the rotation speed of the rotating shaft is reduced to a second speed range, and the second speed range is configured to: enable the centrifugal drive component to drive the interception net component to adjust to a state where the support hole tube and the capsule are completely separated; the second threshold value is greater than the first threshold value.

[0014] Preferably, the centrifugal drive assembly comprises a base cylinder, a centrifugal column is provided in the base cylinder for radial sliding along the rotating shaft, and the centrifugal column is connected to the base cylinder via an elastic member.

[0015] Preferably, a first bearing seat and a second bearing seat are respectively provided at both ends of the rotating shaft in the housing, the first bearing seat and the second bearing seat are both used to install bearings, and a mechanical seal assembly is also provided in the second bearing seat; the mechanical seal assembly includes: a static ring, which is fixedly arranged in the second bearing seat and sleeved on the outside of the rotating shaft; a mounting seat, which is fixedly arranged on the outside of the rotating shaft; a dynamic ring, which is slidably sleeved on the outside of the rotating shaft along the axial direction of the rotating shaft, and the dynamic ring and the mounting seat are connected by a preloaded spring.

[0016] Preferably, a mover is fixedly provided on the outside of the rotating shaft, a stator corresponding to the mover is provided on the inner wall of the casing, and an oil cup is provided at one end of the casing away from the water pump.

[0017] Compared with existing technologies, the present invention provides a deep-well pump power motor with the following advantages: It uses a detector to monitor sediment content in real time, linking the shaft speed with the interception mesh assembly to achieve three-level dynamic adjustment. When sediment levels are low, the pores fully expand, maximizing flow and reducing resistance; when sediment levels are medium, the pores slightly contract, balancing flow and filtration; and when sediment levels are high, the pores mostly contract, preventing sediment intrusion. This design overcomes the limitations of traditional fixed meshes, which are prone to clogging or insufficient flow. It avoids the increased energy consumption caused by excessive filtration and prevents sediment from entering the pump body and causing wear, significantly improving the adaptability and operating efficiency of deep-well pumps in complex water conditions.

[0018] This invention utilizes a purely mechanical drive structure, eliminating the need for electronic sensors or an electronic control unit (ECU). It relies entirely on centrifugal force and spring force for automatic adjustment. The mechanical seal assembly utilizes a rigid sealing surface consisting of a stationary ring, a dynamic ring, and a preload spring, combined with lubrication from a lubricating cup, significantly reducing leakage risk and maintenance frequency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the main structure of a deep well pump power motor;

[0020] Figure 2 for Figure 1 An enlarged schematic diagram of the right half of FIG.

[0021] Figure 3 for Figure 1 An enlarged schematic diagram of the left half of FIG.

[0022] Figure 4 This is a schematic diagram of the planar structure of a regulating capsule in a deep well pump power motor;

[0023] Figure 5 This is a schematic diagram of the three-dimensional structure of the main part of a deep well pump power motor;

[0024] Figure 6This is a schematic diagram of the exploded structure of the main part of a deep well pump power motor;

[0025] In the figure: 1. Casing; 2. Oil cup; 3. First bearing seat; 4. Rotating shaft; 5. Stator; 6. Mover; 7. Second bearing seat; 8. Intercepting net assembly; 9. Centrifugal drive assembly; 10. Connecting cylinder; 11. Pump shaft; 12. Water pump; 13. Mechanical seal assembly; 14. Connecting seat; 141. Seat groove; 81. Mesh plate; 82. Adjusting capsule; 83. Adjusting plate; 84. Support hole cylinder; 85. Side hole; 86. Return spring; 91. Base cylinder; 92. Centrifugal column; 93. Elastic part; 131. Static ring; 132. Mounting seat; 133. Moving ring; 134. Preload spring; 821. Capsule; 822. Arc plate; 823. First spring; 824. Second spring. DETAILED DESCRIPTION

[0026] The terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned description of the drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the terms used in this way can be interchangeable under appropriate circumstances, and this is merely a way of distinguishing the objects of the same attributes when describing them in the embodiments of the present application. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, so that the process, method, system, product or equipment comprising a series of units need not be limited to those units, but may include other units that are not clearly listed or inherent to these processes, methods, products or equipment.

[0027] Example: Please refer to Figures 1-6 In an embodiment of the present invention, a deep well pump power motor is provided, comprising a casing 1 and a rotating shaft 4 arranged in the casing 1; the end of the casing 1 is connected to the water pump 12 through a connecting seat 14, and the side of the connecting seat 14 is provided with a plurality of seat grooves 141 distributed at intervals along the circumference of the connecting seat 14; an interception net assembly 8 is provided in each of the seat grooves 141, and a connecting tube 10 is sleeved on the end of the rotating shaft 4, and the other end of the connecting tube 10 is connected to the pump shaft 11 of the water pump 12, and a centrifugal drive assembly 9 is also provided on the connecting tube 10, and the centrifugal drive assembly 9 can adjust the interception state of the interception net assembly 8 based on the rotation speed of the rotating shaft 4.

[0028] The rotating shaft 4 is connected to the pump shaft 11 of the water pump 12 through the connecting tube 10 so as to drive the water pump 12 to work.

[0029] Furthermore, when shaft 4 rotates, connecting cylinder 10 rotates synchronously, driving centrifugal drive assembly 9. Centrifugal drive assembly 9 rotates with connecting cylinder 10, generating centrifugal force. Centrifugal drive assembly 9 can directly act on interception net assembly 8, automatically adjusting its interception state based on actual operating conditions (sediment content).

[0030] In this embodiment, the intercepting net assembly 8 includes: a mesh plate 81, which is fixedly arranged in the seat groove 141, and a plurality of mesh holes are opened on the mesh plate 81; an adjusting capsule 82, which is correspondingly embedded in each of the mesh holes, and in an unsupported state, the middle capsule hole of the adjusting capsule 82 is in a contracted state; an adjusting plate 83, which is connected to one side of the mesh plate 81 through a reset spring 86, and a support hole tube 84 corresponding to the capsule hole is fixed on the side of the adjusting plate 83 close to the adjusting capsule 82, and the side of the support hole tube 84 has a side hole 85; the reset spring 86 is configured to: drive the adjusting plate 83 to have a tendency to move away from the mesh plate 81, and in the initial state of the reset spring 86, a gap is maintained between the support hole tube 84 and the adjusting capsule 82.

[0031] When unsupported, the pores of the regulating bladder 82 naturally contract. When supported by external forces, the pores expand, improving fluid flow. The regulating plate 83 is connected to one side of the mesh plate 81 via a return spring 86 and can translate along the surface of the mesh plate 81. A support hole cylinder 84 is fixed to the side of the regulating plate 83 near the regulating bladder 82. Each support hole cylinder 84 corresponds to a pore in the regulating bladder 82. When a support hole cylinder 84 is inserted into a pore, fluid can flow into the water pump 12 through the side hole 85.

[0032] In addition, the support hole tube 84 is in a trumpet-shaped structure, and the diameter of the support hole tube 84 at the end close to the mesh plate 81 is set to be smaller than the diameter at the end away from the mesh plate 81.

[0033] The trumpet-shaped design of the support hole tube 84 enables the small end of the support hole tube 84 to first contact the inner wall of the hole when inserted into the hole of the regulating bag 82. As it moves deeper, the large end gradually opens the hole, thereby achieving progressive expansion of the hole.

[0034] When the speed decreases and the centrifugal drive assembly 9 returns to its original position, the return spring 86 pushes the adjustment plate 83 away from the mesh plate 81, and the support tube 84 gradually withdraws from the bladder aperture. The large end of the trumpet-shaped structure first exits the bladder aperture, followed by the small end. This reduces friction with the bladder aperture's inner wall, preventing jamming or tearing of the bladder material. This progressive support prevents localized stress concentration caused by sudden expansion of the bladder aperture, thereby extending the service life of the adjustment bladder 82.

[0035] In this embodiment, the regulating capsule 82 includes a capsule body 821 , which is an annular hollow structure. A plurality of first springs 823 distributed in a circumferential array and a plurality of second springs 824 distributed in a circumferential array are arranged in the hollow structure.

[0036] The first spring 823 is arranged close to the adjustment plate 83, and the second spring 824 is arranged away from the adjustment plate 83; the first spring 823 and the second spring 824 are configured to make the sac hole trumpet-shaped, and the end of the sac hole close to the adjustment plate 83 is smaller than the end away from the adjustment plate 83.

[0037] The bladder 821 is a hollow, annular structure (similar to the inner tube of a car tire) made of elastic rubber or silicone, allowing for free deformation. Two sets of springs are embedded within it: a first spring 823 (close to the adjustment plate 83) and a second spring 824 (farther from the adjustment plate 83). Both sets of springs are arranged in a circular array.

[0038] The first spring 823 has a relatively high elastic modulus. In the unsupported state, its rigid support keeps the end of the bladder hole closest to the adjustment plate 83 contracted (small aperture). The second spring 824 has a relatively low elastic modulus. In the unsupported state, its flexibility allows the end of the bladder hole farther from the adjustment plate 83 to naturally expand (large aperture). However, due to the constraint of the first spring 823, the overall bladder hole forms a trumpet-shaped shape.

[0039] When the support tube 84 is inserted into the bladder hole, the small end of the support tube 84 first contacts the bladder hole, compressing the first spring 823 and forcing the proximal end of the bladder hole to expand. The large end of the support tube 84 then contacts the proximal end of the bladder hole. Ultimately, the combined action of the two sets of springs forms a trumpet-shaped passageway that matches the support tube 84. When the support tube 84 is withdrawn, the first spring 823 resets, pushing the proximal end of the bladder hole to contract; the second spring 824 resets, pulling the distal end of the bladder hole back, and the bladder hole returns to its trumpet-shaped contracted state.

[0040] The contracted state refers to the initial state of the cyst hole, and does not mean that the cyst hole is in a blocked state.

[0041] Furthermore, a plurality of arc-shaped plates 822 distributed in a circumference are embedded in one end of the capsule 821 close to the adjustment plate 83 .

[0042] The curved plates 822 are thin sheets of metal or rigid plastic (such as stainless steel or POM) and are embedded in a circular array in the bladder body 821 near the end of the adjustment plate 83 (i.e., the proximal end of the bladder aperture). Their curved surfaces face the center of the bladder aperture, forming a "petal-like" guiding structure. This ensures that the small end of the support tube 84 automatically aligns with the center of the bladder aperture during insertion, reducing insertion resistance.

[0043] In this embodiment, a detector is also provided on one side of the casing 1 for detecting the sediment content; when the sediment content is greater than a first threshold value, the rotation speed of the rotating shaft 4 is reduced to a first speed range, and the first speed range is configured as: the centrifugal drive component 9 drives the interception net component 8 to adjust to a state where the support hole tube 84 and the first spring 823 form a supporting fit; when the sediment content is greater than a second threshold value, the rotation speed of the rotating shaft 4 is reduced to a second speed range, and the second speed range is configured as: the centrifugal drive component 9 drives the interception net component 8 to adjust to a state where the support hole tube 84 and the capsule 821 are completely separated; the second threshold value is greater than the first threshold value.

[0044] A detector (such as an optical sediment sensor or ultrasonic turbidity meter) monitors the sediment content in the fluid in real time. When the sediment content is less than or equal to a first threshold, the shaft 4 operates at a normal speed, and the centrifugal force generated by the centrifugal drive assembly 9 is sufficiently large to push the adjustment plate 83 to compress the return spring 86, fully inserting the support tube 84 into the bladder hole. The bladder hole expands to its maximum (maximum interception effect and maximum flow rate).

[0045] First threshold < sediment content ≤ second threshold: the speed is reduced to the first speed range, the centrifugal force is reduced, the adjustment plate 83 is partially reset under the action of the reset spring 86, and the support hole tube 84 only forms a supporting cooperation with the first spring 823 (the sac hole is partially contracted, and the interception effect is medium).

[0046] Sediment content > second threshold: The speed is reduced to the second speed range, the centrifugal force is further reduced, the adjustment plate 83 is completely reset, the support hole tube 84 is completely separated from the bladder 821, and the bladder hole is completely contracted under the action of the first spring 823 and the second spring 824 (the interception effect is the strongest and the flow rate is the smallest).

[0047] This graded regulation avoids sudden changes from "fully open" or "fully closed". When the sediment content fluctuates (such as briefly exceeding the first threshold but not reaching the second threshold), the system maintains a certain flow rate by partially contracting the pores, thereby reducing water supply fluctuations on the user side.

[0048] It should be explained that the core of the present invention is to adapt to changes in sediment content by dynamically adjusting the size of the pores of the capsule 82, rather than directly matching the sediment particle size. This design has a good effect in the actual application of deep well pumps. The reasons are: first, the sediment particle size is difficult to detect; second, the sediment content (concentration) is directly related to pump body wear, blockage risk and operating efficiency; third, if it is necessary to monitor the sediment particle size and adjust the pores of the capsule at the same time, it is necessary to add a particle size sensor and more complex control logic, which significantly increases the system cost and maintenance difficulty.

[0049] The present invention only drives the adjustment through the parameter of sediment content, which simplifies the design. Sediment content sensors (such as optical turbidity meters) are mature in technology, low in cost, and do not require frequent calibration.

[0050] It only needs to adjust the rotation speed according to the content threshold, without processing the particle size distribution data, which reduces the complexity of the control system.

[0051] In this embodiment, the centrifugal drive assembly 9 includes a base cylinder 91 , in which a centrifugal column 92 is provided for radial sliding movement along the rotating shaft 4 , and the centrifugal column 92 is connected to the base cylinder 91 via an elastic member 93 .

[0052] The base cylinder 91 is fixed to the exterior of the connecting cylinder 10 and rotates synchronously with the rotating shaft 4. A sliding groove is defined within the base cylinder along the radial direction of the rotating shaft. The centrifugal column 92 is inserted into this groove and can only slide radially (outward or inward). An elastic member 93 (such as a compression spring) has one end connected to the inner wall of the base cylinder 91 and the other end connected to the centrifugal column 92. Its elastic force is in the opposite direction of the centrifugal force, ensuring that the centrifugal column 92 reliably returns to its original position when the rotational speed decreases.

[0053] In this embodiment, a first bearing seat 3 and a second bearing seat 7 are respectively provided at both ends of the rotating shaft 4 in the casing 1. The first bearing seat 3 and the second bearing seat 7 are both used to install bearings, and a mechanical seal assembly 13 is also provided in the second bearing seat 7; the mechanical seal assembly 13 includes: a static ring 131, which is fixedly arranged in the second bearing seat 7 and sleeved on the outside of the rotating shaft 4; a mounting seat 132, which is fixedly arranged on the outside of the rotating shaft 4; a dynamic ring 133, which is slidably sleeved on the outside of the rotating shaft 4 along the axial direction of the rotating shaft 4, and the dynamic ring 133 and the mounting seat 132 are connected by a preload spring 134.

[0054] The stationary ring 131 is fixed to the second bearing seat 7 and is made of highly wear-resistant ceramic or silicon carbide, providing a stable sealing reference surface. The dynamic ring 133, mounted on the rotating shaft 4 via the mounting seat 132, rotates with the rotating shaft 4 and is made of flexible graphite or tungsten carbide, forming a dynamic sealing contact surface with the stationary ring 131. A preload spring 134 connects the dynamic ring 133 to the mounting seat 132, providing an axial preload to ensure a tight fit between the dynamic ring 133 and the stationary ring 131 and compensate for wear or axial movement during operation.

[0055] In addition, a mover 6 is fixedly mounted on the exterior of the rotating shaft 4, and a stator 5 corresponding to the mover 6 is mounted on the inner wall of the housing 1. An oil cup 2 is provided at the end of the housing 1 away from the water pump 12. The oil cup 2 stores grease or lubricating oil, which is then transported to the bearings of the first and second bearing seats 3 and 7 through the oil passage within the housing 1 to reduce friction and wear.

[0056] The above is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with this technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solutions and inventive concepts of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A deep well pump power motor, comprising a housing (1) and a rotating shaft (4) disposed in the housing (1); an end portion of the housing (1) is connected to a water pump (12) via a connecting seat (14); a side portion of the connecting seat (14) is provided with a plurality of seat grooves (141) spaced apart along the circumference of the connecting seat (14); an interception net assembly (8) is disposed in each of the seat grooves (141), characterized in that: The end of the rotating shaft (4) is sleeved with a connecting cylinder (10), the other end of the connecting cylinder (10) is connected to the pump shaft (11) of the water pump (12), and the connecting cylinder (10) is also provided with a centrifugal drive assembly (9), and the centrifugal drive assembly (9) can adjust the interception state of the interception net assembly (8) based on the rotation speed of the rotating shaft (4); The interception net assembly (8) comprises: A mesh plate (81) is fixedly disposed in the seat groove (141), and a plurality of mesh holes are formed on the mesh plate (81); An adjustment capsule (82) is correspondingly embedded in each of the mesh holes, and in an unsupported state, the middle capsule hole of the adjustment capsule (82) is in a contracted state; An adjustment plate (83) is connected to one side of the mesh plate (81) via a return spring (86), and a support hole cylinder (84) corresponding to the bladder hole is fixed on a side of the adjustment plate (83) close to the adjustment bladder (82), and a side hole (85) is provided on the side of the support hole cylinder (84); The return spring (86) is configured to: drive the adjustment plate (83) to have a tendency to move in a direction away from the mesh plate (81), and in the initial state of the return spring (86), a gap is maintained between the support hole cylinder (84) and the adjustment capsule (82); The support hole cylinder (84) is a trumpet-shaped structure, and the diameter of the support hole cylinder (84) is set to be smaller at one end close to the mesh plate (81) than at one end away from the mesh plate (81); The centrifugal drive assembly (9) comprises a base cylinder (91), a centrifugal column (92) is provided in the base cylinder (91) so as to slide radially along the rotating shaft (4), and the centrifugal column (92) is connected to the base cylinder (91) via an elastic member (93).

2. A deep well pump power motor according to claim 1, characterized in that: The regulating capsule (82) comprises a capsule body (821), wherein the capsule body (821) is an annular hollow structure, wherein a plurality of first springs (823) distributed in a circumferential array and a plurality of second springs (824) distributed in a circumferential array are arranged in the hollow structure.

3. A deep well pump power motor according to claim 2, characterized in that: The first spring (823) is arranged close to the adjustment plate (83), and the second spring (824) is arranged away from the adjustment plate (83); The first spring (823) and the second spring (824) are configured such that the sac hole is trumpet-shaped, and the end of the sac hole close to the adjustment plate (83) is smaller than the end of the sac hole away from the adjustment plate (83).

4. A deep well pump power motor according to claim 2, characterized in that: A plurality of arc-shaped plates (822) distributed in a circumferential manner are embedded in one end of the capsule (821) close to the adjustment plate (83).

5. A deep well pump power motor according to claim 3, characterized in that: A detector is also provided on one side of the housing (1) for detecting the sediment content; When the sediment content is greater than a first threshold value, the rotation speed of the rotating shaft (4) is reduced to a first rotation speed range, and the first rotation speed range is configured to: enable the centrifugal drive assembly (9) to drive the interception net assembly (8) to adjust to a state in which the support hole cylinder (84) and the first spring (823) form a supporting fit; When the sediment content is greater than a second threshold value, the rotation speed of the rotating shaft (4) is reduced to a second rotation speed range, and the second rotation speed range is configured to: enable the centrifugal drive component (9) to drive the interception net component (8) to adjust to a state in which the support hole cylinder (84) and the capsule (821) are completely separated; The second threshold is greater than the first threshold.

6. A deep well pump power motor according to claim 1, characterized in that: A first bearing seat (3) and a second bearing seat (7) are respectively provided at both ends of the rotating shaft (4) in the housing (1); the first bearing seat (3) and the second bearing seat (7) are both used for mounting bearings, and a mechanical seal assembly (13) is also provided in the second bearing seat (7); The mechanical seal assembly (13) comprises: a stationary ring (131), which is fixedly arranged in the second bearing seat (7) and sleeved on the outside of the rotating shaft (4); A mounting seat (132) fixedly disposed outside the rotating shaft (4); A dynamic ring (133) is slidably sleeved on the outside of the rotating shaft (4) along the axial direction of the rotating shaft (4), and the dynamic ring (133) is connected to the mounting seat (132) via a preloaded spring (134).

7. A deep well pump power motor according to claim 1, characterized in that: A mover (6) is fixedly provided on the outside of the rotating shaft (4), a stator (5) corresponding to the mover (6) is provided on the inner wall of the casing (1), and an oil cup (2) is provided at one end of the casing (1) away from the water pump (12).

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