Submersible propulsion motor structure

Abstract

The invention discloses a submersible propulsion motor structure which comprises a stator, a rotor, water-lubricated supporting bearings installed on the two sides of the stator, and water-lubricated thrust disc covers and thrust discs arranged at the ends of the water-lubricated supporting bearings, the stator comprises a stator shell, a stator armature and a stator sealing sleeve, and the stator armature and the stator sealing sleeve are arranged in the stator shell in the radial direction. The rotor comprises a rotating shaft, a rotor iron core, a permanent magnet, a rotor sealing sleeve and rotor pressing rings on the two sides, the rotating shaft, the rotor iron core, the permanent magnet, the rotor sealing sleeve and the rotor pressing rings are sequentially installed in the radial direction, the water-lubricated supporting bearings are installed on the two sides of the stator to support the rotor, and the thrust disc is fixedly installed on the rotating shaft and used for transmitting axial thrust to axially limit the rotor. The thrust bearing is arranged at the end of the motor, the radial size is utilized to the maximum extent, the stress area of the thrust bearing is increased, the working state of the thrust bearing is improved, the axial bearing capacity is increased, the stator and the rotor are of a totally-closed static sealing structure, the open type water lubrication bearing is combined, and the characteristic that the motor is simple and reliable in structure is achieved; and the requirements of high thrust and full sealing are met.

Description

Technical Field

[0001] The invention belongs to the technical field of ship propulsion, and in particular relates to a submersible propulsion motor structure. Background Art

[0002] Submersible propulsion motors are limited by the use conditions and the characteristics of the diving equipment itself, and are generally placed at the stern. In order to meet the requirements of fluid mechanics, acoustics and space layout, the stern of the diving equipment is contracted to facilitate linear design, so the motor volume is required to be as small as possible. When working, the submersible propulsion motor needs to withstand a large thrust while achieving underwater sealing, pressure bearing and other characteristics.

[0003] The limitation of volume and the requirement of sealing make it difficult to equip the submersible propulsion motor with thrust bearings of suitable size to bear the axial thrust. In order to achieve the thrust requirements and meet the small size of a single motor, submersible equipment usually adopts a solution of multiple propulsion motors to complete the submersible propulsion task. This solution has high maintenance cost, complex structure and great control difficulty. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention proposes a submersible propulsion motor structure and optimizes the thrust bearing arrangement scheme thereof.

[0005] The technical solution adopted by the patent of the present invention to solve its technical problems is: a submersible propulsion motor structure, including a stator, a rotor and water-lubricated support bearings installed on both sides of the stator, and also including a water-lubricated thrust disc cover and a thrust disc arranged at the end of the water-lubricated support bearing, and an axial water hole is arranged on the thrust disc. The stator includes a stator housing and a stator armature and a stator sealing sleeve radially arranged in the stator housing. The rotor is a fully enclosed static sealing structure formed by installing a rotating shaft, a rotor core, a permanent magnet, a rotor sealing sleeve and rotor pressure rings on both sides in radial order. A radial bearing is arranged at the surface contact between the water-lubricated support bearing and the rotating shaft to support the rotor. The end of the water-lubricated support bearing and the water-lubricated thrust disc cover are provided with axial water-lubricated bearings. The thrust disc is used as a friction pair and forms a thrust bearing structure that can withstand bidirectional thrust with the water-lubricated support bearing and the water-lubricated thrust disc cover.

[0006] In the submersible propulsion motor structure, the radial clearance between the stator and the rotor is larger than the clearance between the water-lubricated support bearing and the surface of the rotating shaft.

[0007] The thrust plate of the submersible propulsion motor structure is fixedly mounted on the rotating shaft for transmitting axial thrust. The gap between the thrust plate and the water-lubricated support bearing and the water-lubricated thrust plate cover is smaller than the axial gap between the stator and the rotor, thereby forming an axial limit for the rotor.

[0008] In the submersible propulsion motor structure, the gap between the thrust plate and the water-lubricated support bearing and the water-lubricated thrust plate cover is smaller than the axial gap between the stator and the rotor, thus forming an axial limit for the rotor.

[0009] The water-lubricated support bearing of the submersible propulsion motor structure is an open bearing.

[0010] The beneficial effects of the patent of the present invention are: the present invention arranges the thrust bearing of the submersible motor at the end of the motor, maximizes the use of the radial dimension, increases the force-bearing area of ​​the thrust bearing, is beneficial to improve its working condition and increase the axial bearing capacity, and both the stator and rotor adopt a fully enclosed static sealing structure, combined with an open water-lubricated bearing, to achieve the characteristics of a simple and reliable motor structure, and solve the submersible motor's needs for small size, large thrust, and full sealing. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 is a cross-sectional view of the overall structure of the present invention; Figure 2 It is a schematic diagram of the motor stator structure of the present invention; Figure 3 It is a schematic diagram of the motor rotor structure of the present invention; Figure 4 It is a schematic diagram of the thrust bearing structure of the present invention.

[0012] The figures are marked as follows: 1—stator, 2—rotor, 11—stator housing, 12—stator armature, 13—stator sealing sleeve, 21—rotating shaft, 22—rotor core, 23—permanent magnet, 24—rotor sealing sleeve, 25—rotor pressure ring, 3—water-lubricated support bearing, 4—water-lubricated thrust plate cover, 5—thrust plate. DETAILED DESCRIPTION

[0013] The embodiments of the present invention are described in detail below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the scope of protection of the present invention. For example, although the various components in the accompanying drawings are drawn in specific proportions, these proportional relationships are only exemplary, and those skilled in the art can make adjustments to them as needed to adapt to specific application scenarios.

[0014] It should be noted that, in the description of the present invention, terms such as "center", "up", "down", "left", "right", "inside" and "outside" indicating directions or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed or operate in a specific orientation, and therefore cannot be understood as a limitation on the invention.

[0015] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be a connection between two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0016] According to an example of the present invention, Figure 1 As shown, a submersible propulsion motor structure includes a stator 1, a rotor 2 and water-lubricated support bearings 3 installed on both sides of the stator 1. The stator 1 and the rotor 2 are both fully enclosed static sealing structures, the water-lubricated support bearing 3 is an open bearing, and also includes a water-lubricated thrust plate cover 4 and a thrust plate 5 arranged at the end of the water-lubricated support bearing 3.

[0017] refer to Figure 2 As shown, in this embodiment, the stator 1 includes a stator housing 11 and a stator armature 12 and a stator sealing sleeve 13 radially arranged in the stator housing 11 .

[0018] refer to Figure 3 As shown, in this embodiment, the rotor 2 adopts a fully enclosed static sealing structure, including a rotating shaft 21, a rotor core 22, a permanent magnet 23, a rotor sealing sleeve 24 and rotor pressure rings 25 on both sides which are installed in radial order.

[0019] refer to Figure 1 As shown, in this embodiment, the water-lubricated support bearings 3 are installed on both sides of the stator 1, and radial bearings are provided at the places where the water-lubricated support bearings 3 contact the surface of the rotating shaft 21 to support the rotor 2. The radial gap between the stator 1 and the rotor 2 is larger than the gap between the water-lubricated support bearings 3 and the surface of the rotating shaft 21.

[0020] refer to Figure 4 As shown, in this embodiment, the thrust plate 5 is fixedly mounted on the rotating shaft 21 for transmitting axial thrust, and the gap between the thrust plate 5 and the water-lubricated support bearing 3 and the water-lubricated thrust plate cover 4 is smaller than the axial gap between the stator and the rotor, thereby forming an axial limit for the rotor 2.

[0021] refer to Figure 4 As shown, in this embodiment, the end of the water-lubricated support bearing 3 and the water-lubricated thrust plate cover 4 are provided with axial water-lubricated bearing shells. The thrust plate 5 serves as a friction pair and together with the water-lubricated support bearing 3 and the water-lubricated thrust plate cover 4 form a thrust bearing structure capable of withstanding bidirectional thrust. An axial water hole is provided on the thrust plate 5, which is beneficial to the flow and heat dissipation of water between the water-lubricated support bearing 3 and the friction pair.

[0022] The water-lubricated support bearing 3, the thrust plate 5 and the water-lubricated thrust plate cover 4 are all open bearings, and the entire motor can be directly immersed in water.

[0023] An example of the present invention is described in detail above, and the protection scope of the present invention should not be considered to be limited to the specific form described in the embodiment. All equivalent changes and improvements made based on the concept of the present invention should fall within the scope of the patent of the present invention.

Claims

1. A submersible propulsion motor structure, characterized in that: The invention comprises a stator (1), a rotor (2), and water-lubricated support bearings (3) mounted on both sides of the stator (1), and also comprises a water-lubricated thrust plate cover (4) and a thrust plate (5) arranged at the end of the water-lubricated support bearing (3); an axial water through hole is arranged on the thrust plate (5); the stator (1) comprises a stator housing (11), and a stator armature (12) and a stator sealing sleeve (13) radially arranged in the stator housing (11); the rotor (2) is a fully enclosed static sealing structure formed by installing a rotating shaft (21), a rotor core (22), a permanent magnet (23), a rotor sealing sleeve (24), and rotor pressure rings (25) on both sides; a radial bearing is arranged between the water-lubricated support bearing (3) and the rotating shaft (21); and an axial water-lubricated bearing is arranged at the end of the water-lubricated support bearing (3) and the water-lubricated thrust plate cover (4).

2. A submersible propulsion motor structure according to claim 1, characterized in that: The radial clearance between the stator (1) and the rotor (2) is greater than the clearance between the water-lubricated support bearing (3) and the rotating shaft (21).

3. A submersible propulsion motor structure according to claim 2, characterized in that: The thrust plate (5) is fixedly mounted on the rotating shaft (21); the gap between the thrust plate (5) and the water-lubricated support bearing (3) and the water-lubricated thrust plate cover (4) is smaller than the axial gap between the stator (1) and the rotor (2), thereby forming an axial limit for the rotor (2).

4. A submersible propulsion motor structure according to claim 3, characterized in that: The gap between the thrust plate (5) and the water-lubricated support bearing (3) and the water-lubricated thrust plate cover (4) is smaller than the axial gap between the stator and the rotor, thereby forming an axial limit for the rotor (2).

5. A submersible propulsion motor structure according to claim 1, 2, 3 or 4, characterized in that: The water-lubricated support bearing (3) is an open bearing.

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