Deepwater motor and fixing tool and sealing method thereof

Abstract

The invention discloses a deepwater motor and a fixing tool and a sealing method thereof, the deepwater motor comprises a motor workpiece, the motor workpiece comprises a rotor iron core, a rotor supporting part and a mounting hole, the rotor iron core is sleeved on the rotor supporting part, and the mounting hole is arranged in the middle of the rotor supporting part. The deepwater motor also comprises a shielding sleeve which is sleeved on the motor workpiece. And the shielding sleeve and the rotor supporting part form sealing through a spinning technology. Meanwhile, the fixing tool can fix the motor workpiece, the deepwater motor is machined through the spinning technology, the deepwater motor has excellent sealing performance, seawater infiltration under high pressure can be avoided, the maintenance frequency is reduced, and the service life of the deepwater motor is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of ocean engineering, and particularly relates to a deep-water motor, its fixing tooling and sealing method. Background Art

[0002] As a core device for deep-sea engineering, the deep-water motor plays an important role in deep-sea resource development and marine scientific research. The deep-water motor is designed specifically for the deep-sea environment and can withstand extreme conditions. Therefore, it is required that the motor must be able to operate reliably under extreme environmental conditions such as high pressure, low temperature, high humidity, and high salinity. As a device used in the deep sea, to avoid short circuits when the motor works underwater, the sealing requirement for the motor is also extremely high. At the same time, due to the special nature of the use occasion of the deep-sea motor, it is troublesome to repair and the repair cost is high. Therefore, it is also required that the service life of the sealing parts in the deep-water motor is long enough to reduce the failure rate.

[0003] Patent CN217692889U discloses a motor housing structure and a motor, which ensure the sealing performance of the motor housing through the settings of a first annular seal, a second annular seal, a cover body 13, and an annular skirt 34. Patent CN222423372U discloses a deep-water motor with a sealing assembly, which improves its sealing performance by arranging a sealing assembly at the connection between the front end cover and the rear end cover of the motor housing and the motor housing. The sealing assembly improves the sealing effect at the connection between the motor housing and the front end cover and the rear end cover through the cooperation of a sealing gasket, a sealing ring, a sealing interlayer, and an inner sealing rib. However, the above-mentioned sealing parts are all made of plastic or rubber materials, and the aging time is accelerated under the erosion of seawater. At the same time, since these sealing parts are arranged inside the motor structure, a complete seal cannot be achieved between them and the motor structure, and there is still a risk of liquid leakage. Summary of the Invention

[0004] In view of the problems of easy aging and poor sealing effect of the existing sealing parts of deep-water motors, the present invention provides the following technical solutions:

[0005] A deep-water motor includes a motor workpiece, the motor workpiece includes a rotor core, a rotor support part, and a mounting hole. The rotor core is sleeved in the rotor support part, and the mounting hole is arranged in the middle of the rotor support part. The deep-water motor further includes a shielding sleeve sleeved on the motor workpiece; the shielding sleeve forms a seal with the rotor support part through a spinning technique.

[0006] Preferably, a first retaining ring and a second retaining ring are provided at one end of the rotor support portion, and the rotor core is disposed between the first retaining ring and the second retaining ring; a first mating portion is provided on the first retaining ring, and a second mating portion is provided on the second retaining ring; one end of the shielding sleeve is a finished right-angle end, and the other end is a finished curved end; the finished curved end is installed by swaging technology with the first mating portion, and the finished right-angle end is installed with the second mating portion by hot-fitting technology.

[0007] Preferably, the deep-water motor further includes a first weld seam and a second weld seam; the first weld seam is disposed at the junction of the finished right-angle end and the second mating portion; the second weld seam is disposed at the junction of the finished curved end and the first mating portion.

[0008] Preferably, the mounting holes of the motor workpiece include a first mounting hole and a second mounting hole arranged coaxially. A guide post is provided in the first mounting hole, and a convex rib is provided on the guide post.

[0009] A fixing tooling is used to fix the motor workpiece in the above-mentioned deep-water motor; the fixing tooling includes an adapter plate and a fixing plate; one end of the adapter plate is used to mount the motor workpiece, and the other end is fixedly connected to the rotating spindle of the swaging equipment; one end of the fixing plate contacts the second retaining ring to tightly press the shielding sleeve blank on the motor workpiece, and the other end is connected to the tailstock of the swaging equipment.

[0010] Preferably, the fixing tooling includes an adapter plate and a fixing plate; the adapter plate includes a base end and a pillar end; the pillar end is a hollow structure, and a positioning groove corresponding to the convex rib is provided on the inner wall of the hollow structure.

[0011] Preferably, the fixing tooling further includes a spacer sleeve and a second fixing member sleeved on the pillar end; the spacer sleeve is installed in the second mounting hole, and the second fixing member is disposed outside the spacer sleeve to fix the spacer sleeve.

[0012] Preferably, the adapter plate includes a base end and a pillar end; the pillar end is sleeved with the mounting hole; the base end is connected to the swaging equipment.

[0013] Preferably, the base end includes a first connection hole, a fixing hole and a first fixing member; the width of the base end is greater than the mounting hole, the first connection hole is connected to the rotating spindle in the swaging equipment; the adapter plate and the rotating spindle of the swaging equipment are fixedly connected through the first fixing member and the fixing hole.

[0014] Preferably, the fixed disk includes a ring and a top plate that are perpendicular to each other. The ring is disposed around the outer periphery of the lower surface of the top plate. The ring is pressed against the second retaining ring to tightly press the shielding sleeve blank and the second retaining ring at the contact point. The top plate is provided with a receiving groove and a second connection hole, and the second connection hole is used to receive the tailstock in the spinning equipment.

[0015] A sealing method for a deep - water motor. The sealing method uses the above - mentioned fixing tooling to seal the above - mentioned deep - water motor. The motor workpiece is installed on the spinning equipment through the fixing tooling, and then the motor workpiece is spin - formed and sealed by using spinning technology.

[0016] Preferably, the sealing method includes the following steps:

[0017] S1: According to the parameters of the motor workpiece, select the tube material and parameters, and process the tube material to obtain a shielding sleeve blank that can be subjected to power spinning. The shielding sleeve blank includes a blank right - angle end and a blank straight end.

[0018] S2: Install the adapter plate on the rotating spindle of the spinning equipment, and install the fixed disk on the tailstock of the spinning equipment.

[0019] S3: Install the motor workpiece on the other end of the adapter plate. The blank right - angle end and the second mating part are installed by hot - fitting, and the blank straight end is disposed above the first mating part.

[0020] S4: Move the tailstock forward to drive the fixed disk forward, so that the fixed disk is pressed tightly against the second retaining ring and the blank right - angle end.

[0021] S5: Start the spinning equipment to perform spin - forming and closing processing on the blank straight end, and press the blank straight end into the first mating part to form the finished curved end; thus, the deep - water motor is obtained.

[0022] Preferably, the sealing method further includes welding the deep - water motor at the junction of the finished curved end and the first mating part, and at the junction of the finished right - angle end and the second mating part.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] (1) After spin - forming and closing the motor workpiece with a shielding sleeve and then performing full - sealing treatment on the closing part by welding, the sealing performance of the deep - water motor is further improved. It can ensure that the rotor core is in a completely sealed space in high - pressure and corrosive seawater for a long time, avoiding the infiltration of seawater under strong pressure; thus, reducing the maintenance frequency of the deep - water motor and increasing the service life of the deep - water motor.

[0025] (2) By using alloy materials for sealing, the seawater corrosion resistance of the deep - water motor is improved, and compared with traditional plastic or rubber seals, the service life of the deep - water motor is increased, thus reducing the equipment maintenance cost;

[0026] (3) Through the fixing tooling of the present invention, the spinning necking can be completed using existing spinning equipment, reducing the manufacturing cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a sectional view of the deep - water motor in the present invention;

[0028] Figure 2 is Figure 1 a sectional view of the motor workpiece of the deep - water motor;

[0029] Figure 3 is an assembly drawing of the fixing tooling of the present invention and the motor workpiece;

[0030] Figure 4 is Figure 3 an exploded assembly drawing;

[0031] Figure 5 is Figure 1 a sectional view of the deep - water motor after processing;

[0032] Figure 6 is another sectional view of the deep - water motor in the present invention;

[0033] Figure 7 is Figure 6 a sectional view of the mounting hole;

[0034] Figure 8 is another fixing tooling and Figure 6 the assembly drawing of the motor workpiece;

[0035] Figure 9 is a sectional view of the bottom section of the support pillar in another fixing tooling;

[0036] Figure 10 is Figure 8 an exploded assembly drawing;

[0037] Figure 11 is Figure 6 a sectional view of the deep - water motor after processing. DETAILED DESCRIPTION OF THE INVENTION

[0038] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0039] Embodiment 1:

[0040] This embodiment provides a deep - water motor. As Figure 1 shown, it includes a motor workpiece and a shielding sleeve 1. The shielding sleeve 1 is sleeved on the motor workpiece to seal the motor workpiece. Further, the shielding sleeve 1 is sleeved on the motor workpiece through hot - fitting and spinning techniques. The shielding sleeve 1 is preferably a tubular material and has good plasticity at high temperatures. More preferably, the shielding sleeve 1 is a NS3304 tubular material.

[0041] The motor workpiece includes a rotor core 21 and a rotor support part 22. The rotor core 21 is sleeved on the rotor support part 22. Further, one end of the rotor support part 22 is provided with a first retaining ring 23 and a second retaining ring 24. Both the first retaining ring 23 and the second retaining ring 24 are arranged along the circumference of the rotor support part 22. The rotor core 21 is arranged between the first retaining ring 23 and the second retaining ring 24. The shielding sleeve 1 is sleeved on the first retaining ring 23 and the second retaining ring 24. The shielding sleeve 1 includes a finished right - angled end 11 and a finished curved end 12. The finished right - angled end 11 is hermetically sealed with the second retaining ring 24 through hot - fitting, and the finished curved end 12 is sealed by spinning technique with the first retaining ring 23. An installation hole 27 is also provided in the middle of the rotor support part 22 for installing the motor drive shaft.

[0042] Further, as Figure 2 shown, a first mating part 25 is provided on the outer side of the first retaining ring 23, and a second mating part 26 is provided on the outer side of the second retaining ring 24. The two ends of the shielding sleeve 1 are respectively a finished right - angled end and a finished curved end. The finished right - angled end 11 is installed with the second mating part 26 through hot - fitting, and the finished curved end 12 is installed and sealed by spinning technique with the first mating part 25. To make the sealing performance of the space for installing the rotor core 21 better, the deep - water motor further includes a first weld (not marked in the figure) and a second weld (not marked in the figure). The first weld is provided at the junction of the finished right - angled end 11 and the second mating part 24. The second weld is provided at the junction of the finished curved end 12 and the first mating part 25.

[0043] Embodiment 2:

[0044] This embodiment provides a fixing tooling. The motor workpiece described in Embodiment 1 is fixed by this fixing tooling, so that the spinning equipment can install the shielding sleeve on the motor workpiece by means of spinning and necking, as Figures 3 - 5 shown.

[0045] The fixing tooling includes an adapter plate 3 and a fixing plate 4. One end of the adapter plate 3 is used to install the motor workpiece, and the other end is fixedly connected to the rotating spindle of the spinning equipment; one end of the fixing plate 4 presses the motor workpiece and the blank 1' of the shielding sleeve (referred to as the blank for short), and the other end is connected to the tailstock of the spinning equipment. The rotating spindle of the spinning equipment forms a support for the motor workpiece through the adapter plate 3, and the motor workpiece is firmly installed on the adapter plate 3 through the tailstock of the spinning equipment, so as to facilitate the spinning process of the blank 1'.

[0046] Specifically, as Figure 3 and 4 shown, the adapter plate 3 includes a base end 31 and a pillar end 32. The base end 31 is fixedly connected to the rotating spindle of the spinning equipment, so that the adapter plate 3 can rotate with the rotation of the rotating spindle of the spinning equipment; the pillar end 32 is connected to the motor workpiece. The motor workpiece is sleeved on the pillar end 32 through the mounting hole 27 and is fixedly connected to the pillar end 32, so that the workpiece can rotate synchronously with the rotating spindle.

[0047] As Figure 4 shown, the pillar end 32 is a cylindrical structure, and its diameter is smaller than that of the base end 31. The outer diameter of the pillar end 32 matches the inner diameter of the mounting hole 27 of the workpiece. Specifically, the pillar end 32 and the mounting hole 27 can form axial fixation through interference fit.

[0048] The base end 31 includes a first connection hole 33, a fixing hole 34 and a first fixing member (not marked in the figure). The width of the base end 31 is greater than the mounting hole 27 of the motor workpiece. The adapter plate 3 is sleeved with the rotating spindle of the spinning equipment through the first connection hole 33, and the adapter plate 3 is fixed to the rotating spindle in the spinning equipment through the first fixing member and the fixing hole 34. Further, the first connection hole 33 includes a first accommodation cavity 35 and a second accommodation cavity 36; the shape of the first accommodation cavity 35 matches the rotating shaft of the spinning equipment, and the second accommodation cavity 36 is arranged below the first accommodation cavity 35.

[0049] The fixed disk 4 includes a ring 41 and a top plate 42, and the ring 41 is arranged vertically with the top plate 42. The ring 41 is pressed on the second retaining ring 24, and is used to press on the shielding sleeve blank 1' and the second retaining ring 24, so that the shielding sleeve blank 1' is in close contact with the second retaining ring 24; the top plate 42 is provided with a receiving groove 43 and a second connecting hole 44, and the receiving groove 43 is connected with the second connecting hole 44; the receiving groove 43 is used to connect the tail top device of the spinning equipment; the second connecting hole 44 is used to accommodate the tail top in the spinning equipment. During operation, the tail top device of the spinning equipment is placed in the receiving groove 43 for positioning, and then the tail top is extended into the second connecting hole 43, and the fixed disk 4 is pressed by the tail top, so as to fix the motor workpiece and the blank 1'.

[0050] Embodiment 3:

[0051] This embodiment provides a sealing method for a deepwater motor, which uses the fixing tool in Example 2 to install the motor workpiece in Example 1 on a spinning device, and uses the spinning technology to seal the motor workpiece, which includes the following steps:

[0052] S1: Select the material of the tube material 1, determine the tube material parameters according to the motor workpiece parameters, and machine the tube material to obtain a shielding sleeve blank 1' that can be subjected to strong spinning processing; Figure 4 As shown, the shielding sleeve blank 1' comprises a blank right-angle end 1-1 and a blank straight end 1-2; at the same time, the motor workpiece is machined to form a first matching portion 25 and a second matching portion 26, as shown in FIG. Figure 4 As shown;

[0053] S2: Install the fixing fixture on the spinning equipment; that is, install the adapter plate 3 on the rotating spindle of the spinning equipment, and install the fixing plate 4 on the tail top of the spinning equipment;

[0054] Specifically, the first connecting hole 33 is sleeved on the rotating spindle of the spinning equipment, and fixed through the fixing hole 34 and the fixing piece, so that the adapter plate 3 is fixed to the rotating spindle; the installation of the fixing plate 4 is completed by sleeve-fitting the receiving groove 43 and the second connecting hole 44 on the tail top;

[0055] S3: After the motor workpiece is mounted on the fixing fixture, the shielding sleeve blank 1' is mounted on the motor workpiece; specifically, Figure 3 and 4 As shown, the mounting hole 27 is sleeved on the pillar end 32 by heat-fitting; then the blank right-angle end 1-1 is matched and installed with the second matching portion 26 by heat-fitting to form a finished right-angle end 11, so that the straight end 1-2 of the shielding sleeve blank is arranged above the first matching portion 25;

[0056] S4: Drive the fixed disk 4 to move forward by moving the tailstock forward, so that the fixed disk 4 is pressed against the second retaining ring 24 and the right-angle end 1-1 of the blank, as Figure 3 shown;

[0057] S5: Start the spinning equipment to perform spinning and necking processing on the straight end 1-2 of the blank, so that the straight end 1-2 of the blank is completely matched with the first mating part 25, thereby forming the finished curved end 12, and then completing the necking to obtain the deep-water motor, as Figure 5 shown;

[0058] In addition, the sealing method further includes welding the deep-water motor to further improve the sealing performance of the deep-water motor. Specifically: weld the junction of the finished curved end 12 and the first mating part 25 and the junction of the finished right-angle end 11 and the second mating part 26 respectively.

[0059] Furthermore, the sealing method further includes further machining and inspection of the deep-water motor to improve the precision requirements of the deep-water motor.

[0060] Preferably, the spinning equipment has a follow-up heating function. In a specific embodiment of the present invention, an existing 600 horizontal double-slide CNC spinning equipment is selected for spinning and necking. The tube material parameters include the fit tolerance between the blank 1' and the motor workpiece, and this fit tolerance parameter varies according to the different materials of the motor workpiece and the tube material. In this specific embodiment, when the tubular material is NS3304 tubular material, the fit tolerance between the blank 1' and the mounting hole 27 is selected as φ145(H7 / s6).

[0061] In summary, during the process of sealing and spinning the motor workpiece using the fixed tooling of the present invention, the motor workpiece is fixed on the spinning equipment, the blank 1' is fixed on the motor workpiece, and the motor workpiece and the blank 1' are fixed by the tailstock. Then, under the action of the spinning wheel of the spinning equipment, the blank 1' undergoes plastic deformation.

[0062] Embodiment 4:

[0063] During the preparation process of the deep-water motor, special spinning tooling is manufactured according to the different requirements of the shape, material, and size of the motor workpiece. Therefore, the difference between this embodiment and Embodiment 1 is that, as Figure 6 shown, the mounting hole 27 of the motor workpiece includes a first mounting hole 28 and a second mounting hole 29. The first mounting hole 28 and the second mounting hole 29 are connected and have the same center line. The inner diameter of the second mounting hole 29 is larger than the inner diameter of the first mounting hole 28.

[0064] Further, a guiding post 281 is provided in the first mounting hole 28, and a convex rib 282 is provided on the guiding post 281, so that the deep-water motor after installation is more stable during use, and at the same time, it can be more stably and conveniently installed on the fixing tooling, such as Figure 7 shown.

[0065] Correspondingly, as Figures 8 - 10 shown, the fixing tooling further includes a spacer sleeve 5 and a second fixing member 6. Through the above settings, the motor workpiece is fixedly installed on the pillar end 32; to match the above-mentioned motor workpiece, the pillar end 32 is a hollow structure, that is, it has a cavity, and a positioning groove 321 corresponding to the convex rib 282 is provided on the inner wall of the cavity. Through the positioning groove 321, the motor workpiece can be quickly and accurately installed on the adapter plate 3.

[0066] Further, the pillar end 32 includes a pillar bottom section 322, a pillar middle section 323 and a pillar top section 324. The diameters of the pillar bottom section 322 and the pillar top section 324 are both larger than the diameter of the pillar middle section 323. The positioning groove 321 is provided on the pillar bottom section 322.

[0067] During installation, align the guiding post 281 of the motor workpiece with the cavity of the pillar end 32, and align the convex rib 282 with the positioning groove 321. Under the guidance of the pillar end 32, the first mounting hole 28 pushes the motor workpiece into the pillar bottom section 322, so that the motor workpiece is sleeved on the pillar end 32; then sleeve the spacer sleeve 5 on the pillar end 32, and place the spacer sleeve 5 into the second mounting hole 29 of the motor workpiece, and then install the second fixing member 6 on the pillar top section 324 to limit the spacer sleeve 5. The outer diameter of the second fixing member 6 is larger than the inner diameter of the spacer sleeve 5; the second fixing member 6 is preferably a nut.

[0068] It should be noted that the technical features in the above-mentioned Embodiments 1 to 4 can be combined arbitrarily, and the combined technical solutions all fall within the protection scope of the present application. And in this article, terms such as "including", "comprising" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including one..." does not exclude the existence of another identical element in the process, method, article or device including the element.

[0069] Although embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A deep - water motor, comprising a motor workpiece, the motor workpiece including a rotor core, a rotor support portion, and a mounting hole, the rotor core being sleeved on the rotor support portion, and the mounting hole being provided in the middle of the rotor support portion, characterized in that, The deep - water motor further includes a shielding sleeve sleeved on the motor workpiece; the shielding sleeve forms a seal with the rotor support part through a spinning technique.

2. The deep-water motor according to claim 1, wherein, One end of the rotor support part is provided with a first retaining ring and a second retaining ring, and the rotor core is arranged between the first retaining ring and the second retaining ring; a first fitting part is provided on the first retaining ring, and a second fitting part is provided on the second retaining ring; one end of the shielding sleeve is a finished right - angle end, and the other end is a finished curved end; the finished curved end is installed by flanging with the first fitting part through a spinning technique, and the finished right - angle end is installed with the second fitting part through a hot - fitting technique.

3. The deep-water motor according to claim 2, wherein The deep - water motor further includes a first weld seam and a second weld seam; the first weld seam is arranged at the junction of the finished right - angle end and the second fitting part; the second weld seam is arranged at the junction of the finished curved end and the first fitting part.

4. The deep-water motor according to claim 2, wherein, The mounting holes of the motor workpiece include a first mounting hole and a second mounting hole arranged coaxially, a guiding post is arranged in the first mounting hole, and a convex rib is arranged on the guiding post.

5. A fixing tooling, characterized in that, The fixing tooling is used to fix the motor workpiece in the deep - water motor according to any one of claims 2 - 3; the fixing tooling includes an adapter plate and a fixing plate; one end of the adapter plate is used to mount the motor workpiece, and the other end is fixedly connected to the rotating spindle of the spinning equipment; One end of the fixing plate contacts the second retaining ring, pressing the shielding sleeve blank tightly against the motor workpiece, and the other end is connected to the tailstock of the spinning equipment.

6. A fixing tooling, characterized in that, The fixing tooling is used to fix the motor workpiece in the deep - water motor according to claim 4; the fixing tooling includes an adapter plate and a fixing plate; the adapter plate includes a base end and a pillar end; The pillar end is a hollow structure, and a positioning groove corresponding to the convex rib is arranged on the inner wall of the hollow structure.

7. The fixing tooling according to claim 6, characterized in that, The fixing tooling further includes a spacer sleeve and a second fixing member sleeved on the pillar end; the spacer sleeve is installed in the second mounting hole, and the second fixing member is arranged outside the spacer sleeve to fix the spacer sleeve.

8. The fixing tooling according to claim 5, characterized in that, The adapter plate includes a base end and a pillar end; the pillar end is sleeved with the mounting hole; the base end is connected to the spinning equipment.

9. The fixing tooling according to claim 5, wherein The base end includes a first connection hole, a fixing hole and a first fixing member; the width of the base end is greater than the mounting hole, the first connection hole is connected to the rotating spindle in the spinning equipment; the adapter plate and the rotating spindle of the spinning equipment are fixedly connected through the first fixing member and the fixing hole.

10. The fixing tooling according to claim 5, characterized in that, The fixing plate includes a ring and a top plate perpendicular to each other, and the ring is arranged around the outer periphery of the lower surface of the top plate; the ring presses on the second retaining ring, pressing the shielding sleeve blank tightly at the contact with the second retaining ring; a receiving groove and a second connection hole are arranged in the top plate, and the second connection hole is used to receive the tailstock in the spinning equipment.

11. A sealing method for a deep - water motor, characterized in that, The sealing method uses the fixing tooling according to any one of claims 5 - 10 to seal the deep - water motor according to any one of claims 1 - 4. The motor workpiece is installed on the spinning equipment through the fixing tooling, and then the motor workpiece is spin - flanged by using the spinning technique.

12. The sealing method according to claim 11, characterized in that, It includes the following steps: S1: According to the parameters of the motor workpiece, select the material and parameters of the tube stock, and process the tube stock to obtain a shielding sleeve blank that can be subjected to power spinning. The shielding sleeve blank includes a blank right-angle end and a blank straight end; S2: Install the adapter plate on the rotating spindle of the spinning equipment, and install the fixed plate on the tailstock of the spinning equipment; S3: Install the motor workpiece on the other end of the adapter plate. The blank right-angle end and the second mating part are installed by hot fitting, and the blank straight end is arranged above the first mating part; S4: Move the tailstock forward to drive the fixed plate forward, so that the fixed plate presses tightly on the second retaining ring and the blank right-angle end; S5: Start the spinning equipment to carry out spinning necking processing on the blank straight end, and press the blank straight end into the first mating part to form the finished product curve end; thus obtaining the deep-water motor.

13. The sealing method according to claim 12, wherein, Weld the deep-water motor at the junction of the finished product curve end and the first mating part, and at the junction of the finished product right-angle end and the second mating part.

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