Pod propulsion motor lead structure and method

Abstract

The present invention discloses a pod propulsion motor lead structure, comprising a cable, a lead transition joint, a lead, a connection part insulation layer and a supporting structure. The lead transition joint is composed of a copper pipe joint, and the lead is composed of a busbar, a low-glue main insulation material, a low-glue insulation paint, an anti-corona insulation layer and a first insulation protection layer; the connection part insulation layer is composed of a high-glue main insulation material, a high-glue quick-drying insulation paint, an anti-corona insulation layer, a first insulation protection layer, a second insulation protection layer and an insulation protection sleeve. The supporting structure is composed of a cable tie, a support block and a stuffing box or an MCT fixing block. The present invention also discloses a lead method thereof, which adopts a staggered avoidance lattice lead arrangement structure to lead out the propulsion motor leads in the most compact space.

Description

Technical Field

[0001] The invention belongs to the field of marine propulsion devices, and in particular relates to a lead structure of a pod propulsion motor and a lead method thereof. Background Art

[0002] Pod propulsion is a new type of marine propulsion device. To meet the application requirements of low water resistance, pod propulsion motors usually adopt a slender structure.

[0003] The pod lead module is a crucial component of the motor, routing the leads of each phase of the pod propulsion motor from the motor coil ends to the wiring connection located atop the rudder body. Given the limited space and slender structure of the pod propulsion motor, not only must the motor end wiring be secure and highly reliable, but the connecting leads must also occupy minimal space, be compact, be simple to load and unload, and be easy to maintain.

[0004] The conventional pod propulsion motor lead-in method adopts a conductive ring welded cable lead structure. This structural form has the disadvantages of long axial dimension, complex staggered arrangement of conductive rings, inconvenient welding operation, and time-consuming insulation treatment process. At the same time, the pod lead-in occupies a large space, which will cause the propulsion module to become longer and the wetted area to become larger, thereby increasing the propulsion resistance and steering torque, which also restricts the improvement of pod performance. Summary of the Invention

[0005] One of the purposes of the present invention is to overcome the above difficulties and provide a new pod propulsion motor lead structure to reduce the space occupied by the leads, shorten the axial length of the pod propulsion module, reduce the wetted area, reduce the propulsion resistance and steering torque, and improve the pod performance.

[0006] The technical solution adopted by the present invention to solve its technical problems is: a pod propulsion motor lead structure, which is used to realize the lead connection and fixation from the end of the propulsion motor to the wiring position at the top of the propulsion module, including five parts: cable, lead transition joint, lead, connection part insulation layer and support structure; the lead transition joint is a copper pipe joint adapted to the cable core diameter; the lead is composed of a busbar, a main insulation material with less glue, an insulating paint with less glue, an anti-corona insulation layer and a first insulating protective layer; the connecting part insulation layer adopts a multi-glue mica insulation structure adapted to the motor voltage level, which is composed of a main insulation material with more glue, a quick-drying insulating paint with more glue, an anti-corona insulation layer, a first insulating protective layer, a second insulating protective layer and an insulating protective sleeve; the support structure is composed of a cable tie, a support block adapted to the insulation level and a stuffing box or an MCT module.

[0007] The cable of the pod propulsion motor lead structure adopts an AC variable frequency ship cable that meets the insulation and voltage resistance level requirements.

[0008] The busbar of the lead wire structure of the pod propulsion motor is an electromagnetic wire or a soft copper busbar with the same specifications as the motor coil.

[0009] The second object of the present invention is to provide a method for wiring a pod propulsion motor to improve the operability of the wiring process, reduce the process difficulty, and save pod installation.

[0010] The technical solution adopted by the present invention to solve the technical problem is: a lead-in method for a pod propulsion motor lead-in structure, comprising the following steps:

[0011] S1, before actual assembly, the leads of the corresponding phase sequence of the pod propulsion motor have been pre-arranged to the preset lead positions: at the top of the propulsion module, the leads are staggered and led out in a lead arrangement of 6 strands / 5 strands / 4 strands / 3 strands, 5 strands / 4 strands / 3 strands, 4 strands / 3 strands / 2 strands, 3 strands / 2 strands / 1 strand, 5 strands / 4 strands, or 2 strands / 1 strand;

[0012] S2, first solder one end of the copper pipe joint to the lead wire with silver solder;

[0013] S3, then pickle and polish the other end of the copper pipe joint to clean oxides and welding slag, insert the cable into the copper pipe joint, fix it with hydraulic clamps, and perform insulation treatment;

[0014] S4, then pass the cable through the cable fixing hole, and weld the end lead of the cable to the coil outlet;

[0015] S5, finally, the welded leads are insulated, and the leads and cables are limited and fixed with a support structure;

[0016] S6, use stuffing box or MCT module to fix the cable.

[0017] Furthermore, in step S1, heat insulation protection is used during the welding process to prevent the insulation layer of the lead from being burned and damaged.

[0018] Furthermore, in step S4, the lead wire may be bent during welding and heat-insulated to avoid burning the insulation layer during welding.

[0019] Furthermore, the lead is manufactured through the following process flow:

[0020] S11, firstly, the busbar is bent and formed into a shape suitable for the site;

[0021] S12, then perform insulation wrapping on the busbar;

[0022] S13, then putting the wrapped lead into an impregnation varnish tank filled with a small amount of insulating varnish to complete vacuum pressure impregnation treatment;

[0023] S14, finally, clean the insulating paint from the exposed metal parts at both ends of the lead wire;

[0024] S15, use stuffing box or MCT module to fix the cable;

[0025] For S16, use cable ties and support blocks suitable for the insulation grade to secure the leads and ensure that the leads have appropriate creepage clearance.

[0026] Furthermore, in step S12, the two ends of the lead wire are exposed for about 35 mm without insulation.

[0027] Furthermore, the insulation wrapping in step S12 is to wrap the multi-glue main insulation material, the anti-corona insulation layer, the first insulation protection layer and the second insulation protection layer layer by layer in the order of precedence. Each layer needs to be evenly coated with multi-glue quick-drying insulation paint before wrapping the next layer, and brushing while wrapping.

[0028] The present invention has the following beneficial effects:

[0029] The lead structure of the present invention adopts a staggered avoidance "trapezoidal" lattice lead arrangement, which leads the propulsion motor leads in the most compact space. This new lead method can reduce the space occupied by the leads, shorten the axial length of the pod propulsion module, reduce the wetted area, reduce the propulsion resistance and steering torque, and improve the pod performance.

[0030] The method of the present invention solves the problem of lead arrangement and installation of pod propulsion motors in a narrow space by staggering and avoiding the "trapezoidal" lattice-shaped lead arrangement; this lead arrangement can be applied to pod propulsion motors with a single-end lead structure (lead at the driving end or lead at the non-driving end), as well as to pod propulsion motors with a double-end lead structure (lead at both the driving end and the non-driving end). BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the lead structure of the present invention in the main viewing direction;

[0032] Figure 2 is a schematic diagram of the lead structure of the present invention as viewed from the side;

[0033] Figure 3 is a schematic diagram of the lead structure of the present invention when viewed from above;

[0034] Figure 4 is a schematic diagram of a lead insulation cross section of the present invention;

[0035] Figure 5 is a schematic diagram of the insulating cross section of the connecting portion of the present invention;

[0036] Figure 6 This is a diagram showing the arrangement of leads at the ends of the motor coils of the present invention;

[0037] Figure 7 It is a three-view drawing after the first step of the lead-in method of the present invention;

[0038] Figure 8 is a three-dimensional diagram of the lead-in method of the present invention after the first step;

[0039] Figure 9 It is a three-view drawing after the second step of the lead-in method of the present invention;

[0040] Figure 10 It is a three-dimensional diagram after the second step of the lead-in method of the present invention;

[0041] Figure 11 It is a three-view drawing after the third step of the lead-in method of the present invention;

[0042] Figure 12 It is a three-dimensional diagram after the third step of the lead-in method of the present invention;

[0043] Figure 13 It is a three-view drawing after the fourth step of the lead-in method of the present invention;

[0044] Figure 14 This is a three-dimensional diagram after the fourth step of the lead-in method of the present invention;

[0045] Figure 15 It is a three-view drawing after the fifth step of the lead-in method of the present invention;

[0046] Figure 16 It is a three-dimensional diagram after the fifth step of the lead-in method of the present invention.

[0047] The figures are marked as follows: 1—cable, 2—copper pipe joint, 3—busbar; 4—main insulating material with less glue, 5—insulating varnish with less glue, 6—anti-corona insulating layer, 7—first insulating protective layer, 8—main insulating material with more glue, 9—quick-drying insulating varnish with more glue, 10—second insulating protective layer, 11—insulating protective sleeve, 12—cable tie, 13—support block, 14—stuffing box or MCT module. DETAILED DESCRIPTION

[0048] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0049] Example 1

[0050] like Figure 1 、 Figure 2 and Figure 3 As shown, the present invention discloses a pod propulsion motor lead structure, which includes five parts: a cable 1, a lead transition joint, a lead, an insulating layer of a connecting part and a supporting structure.

[0051] The cable 1 is an AC variable frequency marine cable that meets the insulation and voltage resistance requirements.

[0052] The lead transition joint is a copper pipe joint 2 adapted to the core diameter of the cable 1.

[0053] The lead wire is composed of a busbar 3, a main insulating material with less glue 4, an insulating paint with less glue 5, an anti-corona insulating layer 6 and a first insulating protective layer 7. The busbar 3 is an electromagnetic wire or a soft copper busbar with the same specifications as the motor coil.

[0054] The connecting portion insulation layer adopts a multi-resin mica insulation structure adapted to the motor voltage level, which consists of a multi-resin main insulation material 8, a multi-resin quick-drying insulating paint 9, an anti-corona insulation layer 6, a first insulating protective layer 7, a second insulating protective layer 10 and an insulating protective sleeve 11.

[0055] The support structure is composed of a cable tie 12, a support block 13 adapted to the insulation grade, and a stuffing box or MCT module 14 (MCT fixing block).

[0056] Together, they connect and secure the wires from the end of the propulsion motor to the wiring location on top of the propulsion module.

[0057] Figure 4 and Figure 5 The diagrams are schematic cross-sectional views of the lead wire insulation and the connection insulation, respectively. This invention utilizes a staggered, trapezoidal, lattice-like layout for routing the propulsion motor leads within the most compact space possible. This staggered, trapezoidal, lattice-like layout solves the cable routing and installation challenges of pod propulsion motors within confined spaces.

[0058] Figure 6 It is the limit diagram of the lead wires at the end of the propulsion motor coil of the pod, which defines the spatial layout of the coil wires connected to the pod wires.

[0059] Example 2

[0060] The lead assembly operation process of the above-mentioned pod propulsion motor lead structure is as follows:

[0061] Before assembly, the corresponding phase sequence leads for the pod's propulsion motors were pre-placed in their designated locations. At the top of the propulsion module, the leads were staggered in a pattern of 6 / 5 / 4 / 3, 5 / 4 / 3, 4 / 3 / 2, 3 / 2 / 1, 5 / 4, or 2 / 1. Thermal insulation was used during welding to prevent burns and damage to the lead insulation.

[0062] S2, first solder one end of the copper pipe joint 2 to the lead wire using silver solder.

[0063] S3, then pickling and polishing the other end of the copper pipe joint 2 to clean oxides and welding slag, inserting the cable 1 into the copper pipe joint 2 and fixing it with hydraulic clamping, and insulating it according to the structural form of the "connection part insulation layer".

[0064] S4, then pass the cable 1 through the cable fixing hole, and the cable end lead is as follows Figures 7 to 16 Complete the welding of the cable leads and the motor phase sequence leads in the order shown, and then return them to their corresponding spatial positions after welding. The leads can be bent during welding and heat-insulated to avoid burning the insulation layer during welding.

[0065] S5, finally, the welded leads are insulated according to the structural form of "connection insulation layer", and the leads and cable 1 are limited and fixed with the support structure. Together, they realize the lead connection and fixation from the end of the propulsion motor to the wiring position at the top of the propulsion module. Before the actual assembly, the leads of the corresponding phase sequence of the pod propulsion motor have been pre-arranged to Figure 2 The spatial location shown.

[0066] S6, use a stuffing box or MCT module 14 to fix the cable.

[0067] Figures 7 to 16 The figure shows the lead connection process of the pod of the present invention; the process adopts the connection order of first inside and then outside, first upper layer and then lower layer, which effectively avoids the staggered lead connection. Figure 7 、 Figure 9 、 Figure 11 、 Figure 13 、 Figure 15 The three views after the first, second, third, fourth and fifth steps of the lead method are shown in order. Figure 8 、 Figure 10 、 Figure 12 、 Figure 14 、 Figure 16 It is a three-dimensional structural diagram of the pod lead connection corresponding to the steps, wherein the number 1-1 represents the first lead of the first step, the number 1-2 represents the second lead of the first step, and so on.

[0068] The staggered, trapezoidal, dot-matrix layout proposed in this invention allows for independent insulation treatment of the leads, allowing related processes to be performed in parallel. Furthermore, the leads can be bent and welded at a distance from the insulation. Furthermore, fewer insulation wrapping locations are required, significantly simplifying the insulation wrapping process. These measures facilitate the processing and manufacturing of pod propulsion motors and reduce lead connection process time.

[0069] Example 3

[0070] Different from the above embodiment, the lead is manufactured through the following process flow:

[0071] S11, firstly, the busbar 3 is bent and formed into a trial shape according to the on-site adaptation shape.

[0072] S12, then perform insulation wrapping on the busbar 3 according to the requirements of the "insulation adaptation voltage rating".

[0073] S13, and then according to the "Insulation Impregnation Specification for Pod Propulsion Motor Coils", the wrapped lead wire is placed into an impregnation varnish tank filled with less-glue insulating varnish 5 to complete the vacuum pressure impregnation treatment.

[0074] S14. Finally, clean the insulating paint from the exposed metal parts at both ends of the lead wire.

[0075] S15, using a stuffing box or MCT module 14 to fix the cable 1.

[0076] S16, use cable ties 12 and support blocks 13 of appropriate insulation grade to secure the leads and ensure that the leads have appropriate creepage clearance.

[0077] Example 4

[0078] Different from the above embodiment, in step S12, the two ends of the lead wire are exposed for about 35 mm without insulation.

[0079] In step S12, the insulation wrapping is performed in accordance with the "insulation-appropriate voltage rating" requirement. The multi-glue main insulation material 8, anti-corona insulation layer 6, first insulating protective layer 7, and second insulating protective layer 10 are wrapped layer by layer in the order specified. Each layer is evenly coated with multi-glue quick-drying insulating varnish 9 before the next layer is applied, applying the paint as the wrapping progresses. For low-voltage pod motors operating at 690V or below, the anti-corona insulation layer 6 can be omitted.

[0080] Example 5

[0081] Unlike the above-mentioned embodiment, the staggered, avoidance "trapezoidal" pattern of the wiring arrangement in this pod represents a "6-strand, 5-strand, 4-strand, and 3-strand" arrangement. Depending on wiring requirements, alternative wiring arrangements can be configured in a staggered fashion, such as "5-strand, 4-strand, and 3-strand," "4-strand, 3-strand, and 2-strand," "3-strand, 2-strand, and 1-strand," "5-strand and 4-strand," or "2-strand and 1-strand."

[0082] Example 6

[0083] The difference from the above embodiment is that the anti-corona layer can be omitted for the insulation of the lead structure of the pod.

[0084] Example 7

[0085] The difference from the above embodiment is that the lead structure of this pod can adapt to the pod propulsion motor with double-ended leads.

[0086] The above description is a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A method for wiring a pod propulsion motor wiring structure, characterized in that: The lead structure realizes the lead connection and fixation from the end of the propulsion motor to the wiring position at the top of the propulsion module, comprising an AC variable frequency marine cable (1), a lead transition joint, a lead, a connection part insulation layer and a support structure; the lead transition joint is a copper pipe joint (2) adapted to the cable (1); the lead is composed of a busbar (3), a main insulation material with less glue (4), an insulation paint with less glue (5), an anti-corona insulation layer (6) and a first insulation protection layer (7); the busbar (3) is an electromagnetic wire or a soft copper busbar with the same specifications as the motor coil; the connection part insulation layer is composed of a main insulation material with more glue (8), a quick-drying insulation paint with more glue (9), an anti-corona insulation layer (6), a first insulation protection layer (7), a second insulation protection layer (10) and an insulation protection sleeve (11); the support structure is composed of a cable tie (12), a support block (13) and a stuffing box or an MCT module (14); and the steps include: S1. Lead out the leads in a staggered arrangement at the top of the propulsion module in the following manner: "6 strands, 5 strands, 4 strands and 3 strands", "5 strands, 4 strands and 3 strands", "4 strands, 3 strands and 2 strands", "3 strands, 2 strands and 1 strand", "5 strands and 4 strands" or "2 strands and 1 strand". S2, solder one end of the copper pipe joint (2) to the lead wire using silver solder; S3, then pickling and polishing the other end of the copper pipe joint (2) to clean oxides and welding slag, inserting the cable (1) into the copper pipe joint (2) and fixing it, and performing insulation treatment; S4, pass the cable (1) through the cable fixing hole, and weld the end lead of the cable to the motor coil outlet; S5, finally, the welded lead is insulated, and the lead and cable (1) are limited and fixed with a support structure.

2. A lead-in method for a pod propulsion motor lead-in structure according to claim 1, characterized in that: The step S1 adopts heat insulation protection during the welding process.

3. The lead-in method of the pod propulsion motor lead-in structure according to claim 1, characterized in that: In the step S4, the lead is bent during welding and heat insulation treatment is performed at the same time.

4. A lead-in method for a pod propulsion motor lead-in structure according to claim 1, 2 or 3, characterized in that: The lead is manufactured through the following steps: S11, firstly bend the busbar (3) into shape; S12, then insulating and wrapping the busbar (3); S13, then put the wrapped lead into the impregnation paint tank filled with less glue insulating paint (5) to complete the vacuum pressure impregnation treatment; S14, finally clean the insulating paint on both ends of the lead wire; S15, using a stuffing box or MCT module (14) to fix the cable (1); S16, use cable ties (12) and support blocks (13) to secure the leads and ensure that the leads have appropriate creepage clearance.

5. A method for wiring a pod propulsion motor wiring structure according to claim 4, characterized in that: In step S12, both ends of the lead wire are exposed for 35 mm.

6. A method for wiring a pod propulsion motor wiring structure according to claim 4, characterized in that: The insulation wrapping in step S12 is to wrap the multi-glue main insulation material (8), the anti-corona insulation layer (6), the first insulation protection layer (7) and the second insulation protection layer (10) layer by layer in the order of precedence, and each layer is evenly coated with the multi-glue quick-drying insulation paint (9) before wrapping the next layer, while brushing while wrapping.

Images