Turbine assembly structure of underground generator

Abstract

The utility model discloses a turbine assembly structure of an underground generator, which relates to the field of underground generators and comprises a rotatable turbine component, an outer magnetic coupling component capable of moving synchronously with the turbine component is arranged in the turbine component, and the turbine component and the outer magnetic coupling component are connected through a magnetic coupler shell. An upper bearing and a lower bearing are arranged in front of and behind the outer magnetic coupling assembly respectively. Through the combined arrangement of the turbine assembly, the outer magnetic coupling assembly and the magnetic coupler shell, the connection tightness of the outer magnetic coupling assembly and the turbine assembly can be improved on the inner side and the outer side of the magnetic coupler shell, and the rotation acting force transmitted by the turbine assembly can be accurately transmitted to the outer magnetic coupling assembly and the magnetic coupler shell; the phenomena of shaking and deviation generated during operation of the turbine assembly structure are effectively reduced, and the stability of the turbine assembly, the outer magnetic coupling assembly and the magnetic coupler shell in the rotating process is improved.

Description

Technical Field

[0001] This utility model relates to the field of downhole generators, and in particular to a turbine assembly structure for a downhole generator. Background Technology

[0002] With the deepening development of oil drilling, the power demand of downhole measurement and control instruments is constantly increasing. Traditional power supply methods such as lithium batteries are no longer sufficient to meet the needs of long-term, high-load operation. Therefore, seeking a more efficient and stable power supply method has become an urgent need in the industry, and downhole turbine generators have emerged to meet this need. The working principle of downhole turbine generators is that the mud drives the external turbine rotor of the turbine generator to rotate, which, through a magnetic coupling mechanism, drives the internal rotor of the turbine generator to rotate. The rotation of the rotor cuts the magnetic induction lines of the stator coil, generating alternating current and achieving the effect of power generation.

[0003] The turbine assembly of the generator is the first conversion structure of the downhole turbine generator. It needs to convert the unstable drill collar fluid into a stable fluid through the blades, while driving the turbine to rotate at high speed and providing a stable magnetic coupling rotational magnetic field. However, the downhole working environment is easily affected by the vibration force generated by the continuous operation of downhole machinery. During operation, the turbine assembly of the generator is in a rotating state and is affected by the external environment, which can easily affect its stability, and thus affect the stability of the generator operation. Utility Model Content

[0004] To address the aforementioned issues, this application provides a downhole generator turbine assembly structure.

[0005] To achieve the above objectives, this application provides the following technical solution: a downhole generator turbine assembly structure, including a rotatable turbine assembly, wherein an external magnetic coupling assembly is provided inside the turbine assembly and can move synchronously therewith, the turbine assembly and the external magnetic coupling assembly are connected through a magnetic coupler housing, and an upper bearing and a lower bearing are respectively provided at the front and rear of the external magnetic coupling assembly, wherein when the turbine assembly rotates, the external magnetic coupling assembly and the magnetic coupler housing rotate synchronously around the central axis of the upper bearing and the lower bearing.

[0006] Furthermore, the turbine assembly includes a cylinder and multiple blades equidistantly distributed around the outer periphery of the cylinder along a circumferential trajectory. The rear end of the cylinder is provided with two positioning bosses. The rear end of the magnetic coupler housing extends outward to form a protrusion. The protrusion is provided with a limiting groove that engages with the positioning bosses. When the cylinder is fitted onto the outside of the magnetic coupler housing, the positioning bosses engage with the limiting grooves.

[0007] Furthermore, the external magnetic coupling assembly includes a hollow magnetic carrier and six external magnetic coupling magnets equidistantly distributed around the outer periphery of the magnetic carrier along a circular trajectory, with the magnetic field directions of two adjacent external magnetic coupling magnets being opposite.

[0008] The magnet carrier has a gap that can accommodate the insertion of external magnetic coupling magnets. A hexagonal surface is milled in the gap, and six external magnetic coupling magnets are respectively attached to the hexagonal surface.

[0009] Furthermore, the magnetic coupler housing is fitted onto the outside of the magnet carrier, the front end of the magnet carrier is provided with an outer mating ring, and the inner surface of the magnetic coupler housing is provided with a limiting inner step that mates with the outer mating ring.

[0010] The front end of the magnetic coupler housing is provided with an upper bearing hole that mates with the upper bearing, and the rear end is provided with a lower bearing hole that mates with the lower bearing. The magnet carrier and the external magnetic coupling magnet are located in the relative space between the upper bearing and the lower bearing.

[0011] Furthermore, the front end of the magnetic coupler housing is provided with a first mounting groove, and a support ring is provided in the first mounting groove. When the cylinder is located outside the magnetic coupler housing, the support ring abuts against the cylinder.

[0012] Furthermore, the front end of the magnetic coupler housing is provided with a second mounting groove, which is located in front of the first mounting groove, and a shaft retaining ring is provided in the second mounting groove, which is located in front of the cylinder.

[0013] In summary, the technical effects and advantages of this utility model are as follows:

[0014] This invention, through the combined arrangement of a turbine assembly, an external magnetic coupling assembly, and a magnetic coupler housing, enhances the tightness of the connection between the external magnetic coupling assembly and the turbine assembly by adjusting the inner and outer sides of the magnetic coupler housing. This allows for the precise transmission of rotational force from the turbine assembly to the external magnetic coupling assembly and the magnetic coupler housing, effectively reducing swaying and misalignment during turbine assembly operation and improving the stability of the turbine assembly, external magnetic coupling assembly, and magnetic coupler housing during rotation. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0017] Figure 2 This is a cross-sectional structural diagram of the external magnetic coupling component and the magnetic coupler housing of this utility model.

[0018] Figure 3 This is a schematic diagram of the external magnetic coupling magnet distribution structure of this utility model.

[0019] Figure 4 This is a schematic diagram of the external magnetic coupling component of this utility model.

[0020] In the diagram: 1. Turbine assembly; 11. Cylinder; 12. Blade; 13. Positioning boss; 2. External magnetic coupling assembly; 21. Magnet carrier; 22. External magnetic coupling magnet; 211. External mating ring; 3. Magnetic coupler housing; 31. Limiting groove; 32. First mounting groove; 33. Support ring; 34. Second mounting groove; 35. Shaft retaining ring; 4. Upper bearing; 5. Lower bearing. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Example: Reference Figure 1-4 The diagram shows a downhole generator turbine assembly structure, including a rotatable turbine assembly 1. The turbine assembly 1 is equipped with an external magnetic coupling assembly 2 that can move synchronously with it. The turbine assembly 1 and the external magnetic coupling assembly 2 are connected by a magnetic coupler housing 3. An upper bearing 4 and a lower bearing 5 are respectively provided at the front and rear of the external magnetic coupling assembly 2. When the turbine assembly 1 rotates, the external magnetic coupling assembly 2 and the magnetic coupler housing 3 rotate synchronously with the central axis of the upper bearing 4 and the lower bearing 5 as the center.

[0023] Specifically, the turbine assembly 1 includes a cylinder 11 and multiple blades 12 equidistantly distributed around the outer periphery of the cylinder 11 along a circumferential trajectory. The rear end of the cylinder 11 is provided with two positioning bosses 13. The rear end of the magnetic coupler housing 3 extends outward to form a protrusion. The protrusion is provided with a limiting groove 31 that engages with the positioning bosses 13. When the cylinder 11 is fitted onto the outside of the magnetic coupler housing 3, the positioning bosses 13 engage with the limiting grooves 31, so that the rotation of the cylinder 11 can drive the magnetic coupler housing 3 to rotate synchronously.

[0024] like Figure 3 , Figure 4As shown, the external magnetic coupling assembly 2 includes a hollow magnetic carrier 21 and six external magnetic coupling magnets 22 equidistantly distributed around the outer periphery of the magnetic carrier 21 along a circular trajectory. The magnetic carrier 21 is made of a non-magnetic copper alloy to ensure that the magnetic field of the external magnetic coupling magnets 22 is not shielded. The external magnetic coupling magnets 22 are made of high-temperature resistant, high magnetic energy level, and coercivity cobalt permanent magnets. The magnetic fields of two adjacent external magnetic coupling magnets 22 are in opposite directions.

[0025] The magnet carrier 21 has a gap that can accommodate the insertion of the external magnetic coupling magnet 22. A hexagonal surface is milled in the gap, and six external magnetic coupling magnets 22 are respectively attached to the hexagonal surface.

[0026] like Figure 2 As shown, the magnetic coupler housing 3 is sleeved on the outside of the magnet carrier 21. The front end of the magnet carrier 21 is provided with an outer mating ring 211. The inner surface of the magnetic coupler housing 3 is provided with a limiting inner step that is in contact with the outer mating ring 211. The limiting inner step can press against the surface of the outer mating ring 211, which has a limiting effect on the magnet carrier 21 and the outer magnetic coupling magnet 22 embedded on its surface, and can effectively prevent the magnet carrier 21 and the outer magnetic coupling magnet 22 from shaking or shifting.

[0027] In order to ensure that the upper bearing 4 and the lower bearing 5 are stably installed, the front end of the magnetic coupler housing 3 is provided with an upper bearing hole that mates with the upper bearing 4, and the rear end is provided with a lower bearing hole that mates with the lower bearing 5. The magnet carrier 21 and the external magnetic coupling magnet 22 are located in the relative space between the upper bearing 4 and the lower bearing 5.

[0028] like Figure 2 As shown, the front end of the magnetic coupler housing 3 is provided with a first mounting groove 32, and a support ring 33 is provided in the first mounting groove 32. When the cylinder 11 is located outside the magnetic coupler housing 3, the support ring 33 abuts against the cylinder 11. The provision of the support ring 33 can improve the tightness of the connection between the magnetic coupler housing 3 and the cylinder 11, effectively avoid the shaking phenomenon caused by the gap between the magnetic coupler housing 3 and the cylinder 11, and further ensure the consistency of the turbine assembly 1 and the magnetic coupler housing 3 during operation.

[0029] like Figure 1 , Figure 2 As shown, the front end of the magnetic coupler housing 3 is provided with a second mounting groove 34, which is located in front of the first mounting groove 32. A shaft retaining ring 35 is provided within the second mounting groove 34, located in front of the cylinder 11. The shaft retaining ring 35 prevents the cylinder 11 from shifting forward, improving the tightness of the connection between the positioning boss 13 and the limiting groove 31. This effectively avoids the displacement and detachment of the turbine assembly 1 caused by the centrifugal force generated during high-speed rotation, ensuring the stability of the turbine assembly 1 during operation.

[0030] In the actual installation process, firstly, external magnetic coupling magnets 22 need to be prepared. Three of the external magnetic coupling magnets 22 are magnetized with the N and S poles from the inside out, and the other three are magnetized with the SN poles from the inside out. The six external magnetic coupling magnets 22 are then bonded to the hexagonal surface of the magnet carrier 21 using high-temperature epoxy adhesive, with the external magnetic coupling magnets 22 of different magnetic field directions arranged adjacent to each other.

[0031] Furthermore, high-temperature epoxy adhesive is applied to the front and rear ends of the magnet carrier 21, on which the external magnetic coupling magnet 22 is installed, and it is installed inside the magnetic coupler housing 3 to ensure that the outer mating ring 211 at the front end of the magnet carrier 21 is flush with the limiting inner step of the magnetic coupler housing 3.

[0032] Subsequently, the upper bearing 4 and lower bearing 5 are respectively interference-fitted into the upper and lower bearing holes at the front and rear ends of the magnetic coupler housing 3 using tooling. The support ring 33 is installed into the first mounting groove 32 of the magnetic coupler housing 3, and the cylinder 11 and blade 12 are fitted onto the outside of the magnetic coupler housing 3, so that the positioning boss 13 engages with the limiting groove 31. Finally, the shaft retaining ring 35 is installed into the second mounting groove 34 of the magnetic coupler housing 3 to achieve axial positioning of the turbine assembly 1.

[0033] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A turbine assembly structure for a downhole generator, characterized in that: The device includes a rotatable turbine assembly (1), which has an external magnetic coupling assembly (2) that can move synchronously with it. The turbine assembly (1) and the external magnetic coupling assembly (2) are connected by a magnetic coupler housing (3). The external magnetic coupling assembly (2) has an upper bearing (4) at the front and a lower bearing (5) at the rear. When the turbine assembly (1) rotates, the external magnetic coupling assembly (2) and the magnetic coupler housing (3) rotate synchronously with the central axis of the upper bearing (4) and the lower bearing (5) as the center.

2. The downhole generator turbine assembly structure according to claim 1, characterized in that: The turbine assembly (1) includes a cylinder (11) and multiple blades (12) evenly distributed around the outer periphery of the cylinder (11) along a circumferential trajectory. The rear end of the cylinder (11) is provided with two positioning bosses (13). The rear end of the magnetic coupler housing (3) extends outward to form a protrusion. The protrusion is provided with a limiting groove (31) that engages with the positioning bosses (13). When the cylinder (11) is fitted onto the outside of the magnetic coupler housing (3), the positioning bosses (13) engage with the limiting groove (31).

3. The downhole generator turbine assembly structure according to claim 2, characterized in that: The external magnetic coupling assembly (2) includes a hollow magnetic carrier (21) and six external magnetic coupling magnets (22) equidistantly distributed around the outer periphery of the magnetic carrier (21) along a circular trajectory. The magnetic fields of two adjacent external magnetic coupling magnets (22) are opposite. The magnet carrier (21) has a gap that can accommodate the insertion of an external magnetic coupling magnet (22). The surface of the gap is milled with a hexagonal surface, and six external magnetic coupling magnets (22) are respectively pasted on the hexagonal surface.

4. The downhole generator turbine assembly structure according to claim 3, characterized in that: The magnetic coupler housing (3) is sleeved on the outside of the magnet carrier (21). The front end of the magnet carrier (21) is provided with an outer docking ring (211). The inner surface of the magnetic coupler housing (3) is provided with a limiting inner step that is in contact with the outer docking ring (211). The front end of the magnetic coupler housing (3) is provided with an upper bearing hole that mates with the upper bearing (4), and the rear end is provided with a lower bearing hole that mates with the lower bearing (5). The magnet carrier (21) and the external magnetic coupling magnet (22) are located in the relative space between the upper bearing (4) and the lower bearing (5).

5. The downhole generator turbine assembly structure according to claim 2, characterized in that: The front end of the magnetic coupler housing (3) is provided with a first mounting groove (32), and a support ring (33) is provided in the first mounting groove (32). When the cylinder (11) is located outside the magnetic coupler housing (3), the support ring (33) abuts against the cylinder (11).

6. The downhole generator turbine assembly structure according to claim 2, characterized in that: The front end of the magnetic coupler housing (3) is provided with a second mounting groove (34), which is located in front of the first mounting groove (32), and a shaft retaining ring (35) is provided in the second mounting groove (34), which is located in front of the cylinder (11).

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