Sea ripple bionic flow channel water-lubricated guide bearing for water-filled submersible motor

Abstract

The invention discloses a sea ripple bionic flow channel water-lubricated guide bearing for a water-filled submersible motor, and belongs to the technical field of submersible motors. The device comprises a guide bearing seat used for being connected with a submersible motor shell, a guide bearing outer ring is installed in a bearing hole of the guide bearing seat in a matched mode, a sea ripple bionic flow channel is machined in the inner hole wall of the guide bearing outer ring, and a guide bearing inner ring is arranged in the guide bearing outer ring; a space is reserved between the guide bearing outer ring and the guide bearing inner ring, and the guide bearing inner ring is arranged on a submersible motor rotating shaft in a sleeving mode and rotates along with the submersible motor rotating shaft at the same time. The self friction loss can be reduced, and the service life is prolonged.

Description

Technical Field

[0001] The invention belongs to the technical field of submersible motors, and in particular relates to a sea wave bionic flow channel water lubrication guide bearing for a water-filled submersible motor. Background Art

[0002] A water-filled submersible motor is a motor that works submerged in water. When connected to a submersible pump, it can pump out groundwater from a well or water from rivers, lakes, and seas. It is widely used in farmland irrigation, urban water supply, water supply for urban and rural residents, drainage of industrial and mining enterprises, drainage of urban and rural construction, and sewage treatment in cities or factories.

[0003] The inner cavity of the water-filled submersible motor is filled with clean water, and a water-lubricated guide bearing is installed inside to support its rotation. The existing water-lubricated guide bearing has a simple flow channel shape, including straight groove type and spiral groove type. The existing flow channel shape has the disadvantages of hindering the flow of the medium, increasing the friction loss, and making it difficult to discharge the solid particles that fall into the middle of the bearing, which reduces the service life of the bearing. Summary of the invention

[0004] The present invention aims at the above-mentioned problems, makes up for the deficiencies of the prior art, and provides a sea wave bionic flow channel water-lubricated guide bearing for a water-filled submersible motor; the present invention can reduce its own friction loss and increase its service life.

[0005] To achieve the above purpose, the present invention adopts the following technical solution.

[0006] The present invention provides a sea wave bionic flow channel water-lubricated guide bearing for a water-filled submersible motor, comprising a guide bearing seat used to be connected to a submersible motor housing, and is characterized in that a guide bearing outer ring is fitted in a bearing hole of the guide bearing seat, an inner hole wall of the guide bearing outer ring is processed with a sea wave bionic flow channel, a guide bearing inner ring is arranged inside the guide bearing outer ring, a space is left between the guide bearing outer ring and the guide bearing inner ring, and the guide bearing inner ring is sleeved on a submersible motor shaft and rotates simultaneously with the submersible motor shaft.

[0007] Furthermore, the flow route of the sea ripple bionic flow channel simulates the sea ripples and starts and ends at the two ends of the outer ring of the guide bearing, and the curvature of the streamline gradually increases from the axial middle to the two ends.

[0008] Furthermore, the cross-sectional shape of the sea wave bionic flow channel simulates the sea wave changes in a semicircular shape, and the radius of the sea wave bionic flow channel gradually increases from the axial middle part to both ends of the guide bearing outer ring.

[0009] Furthermore, the cross-sectional area and radius range of the sea ripple bionic flow channel depend on the diameter of the submersible motor shaft and the number of the sea ripple bionic flow channels, and are calculated and set according to the following formula: Q = 0.3D; Where, Q is the water supply (L / min); D is the shaft diameter (mm); Smin is the minimum cross-sectional area of ​​the flow channel (mm 2 ); Smax is the maximum cross-sectional area of ​​the flow channel (mm 2 ); Rmin is the minimum radius of the flow channel (mm); Rmax is the maximum radius of the flow channel (mm); N is the number of sea wave bionic flow channels.

[0010] Furthermore, the number of the sea ripple bionic flow channels is set according to the inner diameter of the guide bearing outer ring. When the inner diameter of the guide bearing outer ring is less than 100 mm, the number of the sea ripple bionic flow channels is six. When the inner diameter of the guide bearing outer ring is above 100 mm, the number of the sea ripple bionic flow channels increases by one for every increase of 15 mm.

[0011] Furthermore, the guide bearing outer ring includes a first guide bearing outer ring and a second guide bearing outer ring having the same inner and outer diameters, the first guide bearing outer ring and the second guide bearing outer ring are respectively transitionally matched with the bearing holes of the guide bearing seat, a space is left between the first guide bearing outer ring and the second guide bearing outer ring in the axial direction, and a through hole is radially arranged on the guide bearing seat corresponding to the space between the first guide bearing outer ring and the second guide bearing outer ring.

[0012] Furthermore, the guide bearing inner ring comprises a first guide bearing inner ring and a second guide bearing inner ring of the same diameter, the ends of the first guide bearing inner ring and the second guide bearing inner ring are tightly attached to and are shrink-fitted onto the submersible motor shaft respectively, and the first guide bearing inner ring and the second guide bearing inner ring are respectively interference fit with the submersible motor shaft.

[0013] Furthermore, a flange is provided on the guide bearing seat, bolt holes are provided on the flange, and the guide bearing seat is fixed to the submersible motor housing by bolts through the flange.

[0014] Beneficial effects of the present invention.

[0015] The present invention provides a sea wave bionic flow channel that simulates sea waves, so that the flow resistance of water in the flow channel is reduced, thereby making the bearing have lower friction loss; the outer ring of the guide bearing is divided into two sections, and a through hole is provided in the middle of the two sections, so that the flow channel can be shortened and impurities can be easily discharged; the sea wave bionic flow channel is narrow in the middle and wide on both sides, which can also make it easier to discharge impurities, thereby reducing the wear of the bearing on the impurities and increasing the life of the bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be understood that the specific implementation methods described herein are only used to explain the present invention and are not used to limit the present invention.

[0017] Figure 1 It is a schematic diagram of the explosion structure of the present invention.

[0018] Figure 2 It is a side sectional structural schematic diagram of the present invention.

[0019] Figure 3 It is a schematic structural diagram of the first guide bearing outer ring and the second guide bearing outer ring of the present invention.

[0020] Markings in the figure: 1 is the guide bearing seat, 2 is the sea wave bionic flow channel, 3 is the first guide bearing outer ring, 4 is the second guide bearing outer ring, 5 is the through hole, 6 is the first guide bearing inner ring, 7 is the second guide bearing inner ring, and 8 is the flange. DETAILED DESCRIPTION

[0021] As shown in the accompanying drawings, this embodiment provides a sea wave bionic flow channel water-lubricated guide bearing for a water-filled submersible motor, including a guide bearing seat 1 for connecting to the submersible motor housing, a flange 8 is provided on the guide bearing seat 1, bolt holes are provided on the flange 8, and the guide bearing seat 1 is fixed to the submersible motor housing by bolts through the flange 8.

[0022] A guide bearing outer ring is installed in the bearing hole of the guide bearing seat 1, and the inner hole wall of the guide bearing outer ring is processed with a sea wave bionic flow channel 2. The flow route of the sea wave bionic flow channel 2 simulates the sea wave and starts and ends at the two ends of the guide bearing outer ring. The curvature of the streamline gradually increases from the axial middle to the two ends.

[0023] The cross-sectional shape of the sea wave bionic flow channel 2 simulates the sea wave and changes into a semicircular shape. The radius of the sea wave bionic flow channel 2 gradually increases from the axial middle part to both ends of the guide bearing outer ring.

[0024] The cross-sectional area and radius range of the sea ripple bionic flow channel 2 depend on the diameter of the submersible motor shaft and the number of sea ripple bionic flow channels 2, and are calculated and set according to the following formula: Q = 0.3D; Where, Q is the water supply (L / min); D is the shaft diameter (mm); Smin is the minimum cross-sectional area of ​​the flow channel (mm 2 ); Smax is the maximum cross-sectional area of ​​the flow channel (mm 2 ); Rmin is the minimum radius of the flow channel (mm); Rmax is the maximum radius of the flow channel (mm); N is the number of sea wave bionic flow channels.

[0025] The number of sea ripple bionic flow channels 2 is set according to the inner diameter of the guide bearing outer ring. When the inner diameter of the guide bearing outer ring is less than 100mm, the number of sea ripple bionic flow channels 2 is six. When the inner diameter of the guide bearing outer ring is above 100mm, the number of sea ripple bionic flow channels 2 increases by one for every increase of 15mm.

[0026] In order to further extend the service life, the guide bearing outer ring is configured to be composed of a first guide bearing outer ring 3 and a second guide bearing outer ring 4 with the same inner and outer diameters. The first guide bearing outer ring 3 and the second guide bearing outer ring 4 are transitionally matched with the bearing holes of the guide bearing seat 1 respectively, which can ensure the tightness of the fit without causing excessive deformation of the first guide bearing outer ring 3 and the second guide bearing outer ring 4.

[0027] A space is left between the first guide bearing outer ring 3 and the second guide bearing outer ring 4 in the axial direction, and a through hole 5 is radially arranged on the guide bearing seat 1 at the space corresponding to the first guide bearing outer ring 3 and the second guide bearing outer ring 4 to ensure that water flow can participate in lubrication through the through hole 5, and impurities can be discharged through the through hole 5, thereby reducing the wear of the impurities on the bearing and increasing the life of the bearing.

[0028] At the same time, it should be noted that the curvature and radius of the sea wave bionic flow channel 2 change by taking the first guide bearing outer ring 3 and the second guide bearing outer ring 4 as a whole, and gradually increase from between the first guide bearing outer ring 3 and the second guide bearing outer ring 4 to both ends.

[0029] A guide bearing inner ring is arranged inside the guide bearing outer ring, and a space is left between the guide bearing outer ring and the guide bearing inner ring. The guide bearing inner ring is sleeved on the submersible motor shaft and rotates simultaneously with the submersible motor shaft. When the submersible motor rotates, the water film between the guide bearing outer ring and the guide bearing inner ring supports the rotation of the submersible motor shaft.

[0030] The guide bearing inner ring includes a first guide bearing inner ring 6 and a second guide bearing inner ring 7 of the same diameter. The ends of the first guide bearing inner ring 6 and the second guide bearing inner ring 7 are tightly attached and shrink-fitted onto the submersible motor shaft respectively. The first guide bearing inner ring 6 and the second guide bearing inner ring 7 are respectively interference fit with the submersible motor shaft to ensure the tightness of the fit.

[0031] After installation, the outer circles of the first guide bearing inner ring 6 and the second guide bearing inner ring 7 need to be circularly ground to reduce the elliptical deformation of the thin-walled parts and the deformation caused by shrink fitting, so that the dimensional tolerance, shape and position tolerance and roughness reach the optimal state.

[0032] It should also be noted that after installation is completed, the water-filled submersible motor should be filled with water before it can be operated.

[0033] It can be understood that the above specific description of the present invention is only used to illustrate the present invention and is not limited to the technical solutions described in the embodiments of the present invention. Those skilled in the art should understand that the present invention can still be modified or replaced by equivalents to achieve the same technical effects; as long as the use requirements are met, they are within the protection scope of the present invention.

Claims

1. A sea wave bionic flow channel water lubricated guide bearing for a water-filled submersible motor, comprising a guide bearing seat (1) for connecting to a submersible motor housing, characterized in that: A guide bearing outer ring is fitted in the bearing hole of the guide bearing seat (1); the inner hole wall of the guide bearing outer ring is processed with a sea wave bionic flow channel (2); a guide bearing inner ring is arranged inside the guide bearing outer ring; a space is left between the guide bearing outer ring and the guide bearing inner ring; the guide bearing inner ring is sleeved on the submersible motor shaft and rotates simultaneously with the submersible motor shaft.

2. The sea wave bionic flow channel water lubricated guide bearing for a water-filled submersible motor according to claim 1, characterized in that: The flow path of the sea wave bionic flow channel (2) simulates the sea wave and starts and ends at the two ends of the outer ring of the guide bearing, and the curvature of the streamline gradually increases from the axial middle to the two ends.

3. The sea wave bionic flow channel water lubricated guide bearing for a water-filled submersible motor according to claim 1, characterized in that: The cross-sectional shape of the sea wave bionic flow channel (2) simulates the sea wave and changes in a semicircular shape. The radius of the sea wave bionic flow channel (2) gradually increases from the axial middle part of the guide bearing outer ring to the two end parts.

4. The sea wave bionic flow channel water lubricated guide bearing for a water-filled submersible motor according to claim 3, characterized in that: The cross-sectional area and radius range of the sea ripple bionic flow channel (2) depend on the diameter of the submersible motor shaft and the number of the sea ripple bionic flow channels (2), and are calculated and set according to the following formula: Q = 0.3D; Where, Q is the water supply (L / min); D is the shaft diameter (mm); Smin is the minimum cross-sectional area of ​​the flow channel (mm 2 ); Smax is the maximum cross-sectional area of ​​the flow channel (mm 2 ); Rmin is the minimum radius of the flow channel (mm); Rmax is the maximum radius of the flow channel (mm); N is the number of the sea wave bionic flow channels (2).

5. The sea wave bionic flow channel water lubricated guide bearing for a water-filled submersible motor according to claim 1, characterized in that: The number of the sea ripple bionic flow channels (2) is set according to the inner diameter of the guide bearing outer ring. When the inner diameter of the guide bearing outer ring is less than 100 mm, the number of the sea ripple bionic flow channels (2) is six. When the inner diameter of the guide bearing outer ring is greater than 100 mm, the number of the sea ripple bionic flow channels (2) increases by one for every increase of 15 mm.

6. The sea wave bionic flow channel water lubricated guide bearing for a water-filled submersible motor according to claim 1, characterized in that: The guide bearing outer ring comprises a first guide bearing outer ring (3) and a second guide bearing outer ring (4) having the same inner and outer diameters. The first guide bearing outer ring (3) and the second guide bearing outer ring (4) are respectively transitionally matched with the bearing holes of the guide bearing seat (11). A space is left between the first guide bearing outer ring (3) and the second guide bearing outer ring (4) in the axial direction. A through hole (5) is radially arranged on the guide bearing seat (11) at the space corresponding to the first guide bearing outer ring (3) and the second guide bearing outer ring (4).

7. The sea wave bionic flow channel water lubricated guide bearing for a water-filled submersible motor according to claim 1, characterized in that: The guide bearing inner ring comprises a first guide bearing inner ring (6) and a second guide bearing inner ring (7) having the same diameter. The ends of the first guide bearing inner ring (6) and the second guide bearing inner ring (7) are tightly attached to and respectively shrink-fitted on the submersible motor shaft. The first guide bearing inner ring (6) and the second guide bearing inner ring (7) are respectively interference fit with the submersible motor shaft.

8. The sea wave bionic flow channel water lubricated guide bearing for a water-filled submersible motor according to claim 1, characterized in that: The guide bearing seat (11) is provided with a flange (8), the flange (8) is provided with bolt holes, and the guide bearing seat (11) is fixed to the submersible motor housing by bolts through the flange (8).

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