WO2021077464A1

WO2021077464A1 - Waterproof motor

Info

Publication number: WO2021077464A1
Application number: PCT/CN2019/115654
Authority: WO
Inventors: 陈增强; 黄俊平
Original assignee: 深圳市吉影科技有限公司
Priority date: 2019-10-22
Filing date: 2019-11-05
Publication date: 2021-04-29
Also published as: CN112701833A

Abstract

The present invention provides a waterproof motor, comprising a stator component, a housing, a motor fixing plate, a sealing component, and an end cover. The stator component is inserted inside the housing. The motor fixing plate is disposed at a first end opening of the housing. The stator component, the housing, and the motor fixing plate form an integrated structure by means of potting. A second end opening of the housing is sealed by means of the sealing component and the end cover. Compared with the prior art, the present invention has the following beneficial effects: the waterproof motor provides reliable sealing by using both the potted integrated structure and the sealing component, and avoids the problem in which the motor seizes due to ingress of sand and seawater during operation, thus significantly extending the service life of the waterproof motor, and reducing the after-sales maintenance cost thereof.

Description

A waterproof motor

Technical field

The invention relates to the technical field of electrical equipment, in particular to a waterproof motor.

Background technique

As countries increase their efforts in the development of marine resources year by year, ordinary people's workplaces are no longer limited to land, and have been expanding to the depths of the ocean. Now, ordinary laborers can often be seen on the ocean.

Based on the factors of the marine environment, it is more difficult and dangerous to go to sea, so the efficiency of going to sea or underwater operation is required to be as high as possible. In order to improve the efficiency of underwater operations, people began to invent many tools suitable for underwater operations, such as underwater robots, underwater lights, underwater cameras, underwater manipulators, underwater propellers, and so on. Among many underwater working tools, the waterproof motor as the source of underwater power output plays a central role. As the power source of the underwater operation equipment, the underwater waterproof motor can drive the underwater operation equipment to realize various mechanical movements underwater, so as to perform various operations under the water.

Therefore, related personnel have been prompted to do a lot of research and development work in the field of waterproof motors, and completed the design of waterproof motors in the prior art. However, the waterproof motors in the prior art are not perfect equipment, and they mainly have the following defects :

1. Regarding the existing sealed and waterproof motors, the sealed and waterproof motors in the prior art are too large, and the energy loss caused by their own too large size is too large, which greatly reduces the efficiency of the motor;

2. For the existing open underwater waterproof motor, the design points are:

(1) The various key components of the motor have been treated to prevent seawater corrosion;

(2) Apply epoxy resin spray treatment to the magnetic sheet of the motor and stick the magnetic sheet on the inner wall of the rotor housing;

(3) The rotor shell of the motor is also sprayed to prevent seawater;

(4) The coil is wound on the iron core of the stator, and then the stator coil is potted and protected with potting glue.

Therefore, the underwater waterproof motor made by using the above-mentioned various anti-seawater corrosion measures has the characteristics of good corrosion resistance and high efficiency. But the disadvantage of this motor is that it is easy to enter the sea and sand, and it is also easy to crystallize, causing the motor to jam and fail to work. The failure rate of this motor is relatively high.

Therefore, it is urgent to research and develop a new type of waterproof motor with high efficiency, wide application range and low failure rate.

Summary of the invention

In view of this, in order to solve the problems of low efficiency and high failure rate of waterproof motors in the prior art, the present invention provides a waterproof motor, which includes a stator assembly, a housing, a motor fixing plate, a sealing assembly and an end cover. The stator assembly is sleeved inside the casing, the motor fixing plate is placed at the first port of the casing, and the stator assembly, the casing and the motor fixing plate are potted into an integrated structure , The second port of the casing is sealed by the sealing component and the end cover.

Preferably, the stator assembly includes a stator core, the stator core includes a plurality of split stator cores, the split stator core is an arc-shaped I-shaped component, and the arc-shaped I-shaped component is provided with In the winding slot, a plurality of the split stator cores can be surrounded into a circular stator core.

Preferably, it further includes a first bearing bracket, and the first bearing bracket, the stator assembly, the casing and the motor fixing plate are potted into an integrated structure.

Preferably, the stator assembly, the casing and the motor fixing plate are formed into an integral structure by potting epoxy resin.

Preferably, it further includes an inner rotor, the inner rotor is placed in the accommodating cavity formed by the stator assembly, and the inner rotor includes a main shaft and an inner rotor body mounted on the main shaft.

Preferably, it further includes a first bearing bracket provided at the first port of the casing, a first bearing and a second bearing are respectively sleeved on both ends of the main shaft, and a second bearing is provided on the end cover. Bearing bracket, the first bearing is placed in the first bearing bracket, and the second bearing is placed in the second bearing bracket.

Preferably, the sealing assembly includes a first sealing ring and a second sealing ring. The second port is sealed.

Preferably, the casing is a hollow cylinder, the motor fixing plate is a ring structure, the diameter of the waterproof motor is less than or equal to 37.5 mm, and the height of the waterproof motor is less than or equal to 56 mm.

Preferably, it further includes a connecting plate, the connecting plate rotates with the main shaft, the connecting plate is used to connect an external device; the motor fixing plate is provided with a circuit connecting plate, and the circuit connecting plate is used for external Electrical connection.

Preferably, the main shaft extends out of the end cover, and an oil seal is provided on the outside of the end cover, and the position where the main shaft extends out of the end cover is sealed by the oil seal.

Compared with the prior art, the beneficial effects of the present invention are:

The present invention provides a waterproof motor, which adopts both an integrated potting structure for sealing and a sealing component for sealing, and the sealing is reliable. The motor avoids the jamming of the motor due to the ingress of sea sand and seawater during use. The problem is that the working life of the motor is greatly extended, and the after-sales maintenance cost of the motor is reduced.

Description of the drawings

In order to more clearly describe the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are merely of the present invention. For some embodiments, those of ordinary skill in the art can obtain other drawings based on these drawings without creative labor.

Figure 1 is an exploded view of the structure of the waterproof motor in the present invention;

Figure 2 is a schematic diagram of the structure of the split stator core in the present invention;

Fig. 3 is a schematic diagram of the structure of the stator core in the present invention.

Reference signs:

Motor fixing plate 1, first bearing bracket 2, housing 3, potting epoxy resin part 4, first bearing 5, inner rotor 6, second bearing 7, first sealing ring 8, second sealing ring 9, end The cover 10, the oil seal 11, the connecting plate 12, the fixing member 13, the stator assembly 15, the split stator core 16, the winding groove 17, and the stator core 18.

Detailed ways

The above and other technical features and advantages of the present invention will be described in more detail below in conjunction with the accompanying drawings.

In the description of the present invention, it should be understood that the terms "first" and "second" are only used for description purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined with "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, "plurality" means at least two, unless otherwise specifically defined.

In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and other terms should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. , Or integrated; it can be mechanically connected, or it can be electrically connected or can communicate with each other; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal communication of two components or the interaction relationship between two components, Unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above-mentioned terms in the present invention can be understood according to specific situations.

In the description of this specification, descriptions with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean specific features described in conjunction with the embodiment or example , Structure, materials or features are included in at least one embodiment or example of the present invention.

In the following description, for the purpose of illustration rather than limitation, specific details such as a specific system structure and technology are proposed for a thorough understanding of the embodiments of the present invention. However, it should be clear to those skilled in the art that the present invention can also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to avoid unnecessary details from obstructing the description of the present invention.

In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine the different embodiments or examples and the features of the different embodiments or examples described in this specification without contradicting each other.

In order to illustrate the technical solution of the present invention, specific embodiments are used for description below.

Figure 1 is an exploded view of the structure of the waterproof motor in the present invention. As shown in Figure 1, an embodiment of the present invention provides a waterproof motor, which includes a motor fixing plate 1, a first bearing bracket 2, a casing 3, a potting epoxy resin part 4, a first bearing 5, and an inner rotor 6. , The second bearing 7, the first sealing ring 8, the second sealing ring 9, the end cover 10, the oil seal 11, the connecting plate 12 and the fixing member 13.

The casing 3 is the main casing of the entire motor, and the size of the casing 3 determines the size of the overall motor. The casing 3 is provided with an internal cavity, and the stator assembly 15 is sleeved inside the casing 3. Preferably, the stator assembly 15 is installed on the inner wall of the casing 3. The stator assembly 15 also forms an internal cavity. The stator assembly 15 The formed internal cavity can be used to accommodate the inner rotor 6. The stator assembly 15 includes a stator core 18 and coils on the core. The stator core 18 includes a plurality of split stator cores 16. Preferably, the split stator core 16 is an arc-shaped I-shaped component, and a winding slot 17 is provided in the middle of the arc-shaped I-shaped component. Several split stator cores 16 can surround a circular stator core 18. The beneficial effect of using the split stator core 16 is that the full rate of the winding slot is greatly improved.

The motor fixing plate 1, the first bearing bracket 2 and the casing 3 are potted into one body. The potting epoxy resin is used for potting during the potting process. The motor fixing plate 1, the first bearing bracket 2 and the casing 3 One port is sealed. The second port of the casing 3 can be used to insert the inner rotor 6. Preferably, the motor fixing plate 1 is provided with an accommodating hole for accommodating the first bearing bracket 2. The motor fixing plate 1 is also provided with a number of mounting holes through which the waterproof motor can be locked and connected to other equipment. The motor fixing plate 1 is provided with a circuit connection board, which is used for external power connection. The circuit connection board is preferably a PCB connection board.

After potting, a potting epoxy resin part 4 is formed inside the casing 3. The potting process is as follows: first put the stator assembly 15 into the casing 3, and then press the motor fixing plate 1 into the inner casing 3, that is, press into the motor fixing plate 1 from the first port of the casing 3. Put the assembled casing 3 and the first bearing bracket 2 in the potting mold, and then vacuum and potting epoxy resin, so that the casing 3, the motor fixing plate 1 and the first bearing bracket 2 form a whole . The main function of potting is to plastic seal the casing 3 so that the casing 3, the first bearing bracket 2 and the motor fixing plate 1 are integrated.

Preferably, in the interior of the casing 3, a potting epoxy resin part 4 is formed in the connection area between one end of the stator assembly 15 and the motor fixing plate 1 and the first bearing bracket 2.

Preferably, the casing 3 is a hollow cylinder, and the casing 3 includes two ports. The first bearing bracket 2 is a circular bracket. The motor fixing plate 1 has a ring structure.

The first bearing bracket 2 is potted integrally with the motor fixing plate 1 and the casing 3, and is used to install the first bearing 5 on the inner rotor 6. The concentricity of the first bearing bracket 2 is guaranteed by the accuracy of the mold.

The inner rotor 6 rotates under the action of a magnetic field to provide power. The inner rotor 6 includes a main shaft and an inner rotor body mounted on the main shaft. A first bearing 5 and a second bearing 7 are sleeved on both ends of the main shaft. The inner rotor body includes an inner rotor iron core and magnets glued to the iron core. Preferably, there are 14 magnets glued to the iron core. The first bearing 5 is installed in the first bearing bracket 2, and the second bearing 7 is installed in the bearing bracket on the end cover 10. The inner rotor 6 is supported by the first bearing 5 and the second bearing 7, so that the inner rotor 6 can rotate and work normally.

The first sealing ring 8 and the second sealing ring 9 are sealing components. The second port of the casing 3 is sealed by the first sealing ring 8, the second sealing ring 9 and the end cover 10 placed in sequence. That is to prevent water from entering the inside of the casing 3 from the round edge of the second port of the casing 3. The first sealing ring 8 and the second sealing ring 9 are installed in the plastic-sealed casing 3, and reliable sealing is achieved under the pressing of the end cover 10 and the casing 3. The second sealing ring 9 and the first sealing ring 8 are also installed at different positions of the casing 3, and their main function is to seal the gap between the casing 3 and the end cover 10. Regarding the end cover 10, preferably, it is fixed to the casing 3 by pressure riveting, and the sealing ring is compressed at the same time to play the role of sealing.

An oil seal 11 is sleeved on the outer shaft of the end cover 10, and the oil seal 11 is used to seal the axial direction and prevent water from flowing into the motor along the shaft. The oil seal 11 is preferably a high-pressure oil seal. The position where the main shaft of the inner rotor 6 extends out of the end cover 10 is sealed by an oil seal 11.

The connecting plate 12 is sleeved on the main shaft of the inner rotor 6 and rotates together with the inner rotor 6. Its main function is to connect the blades outside the motor so that the blades can rotate with the inner rotor 6 together. The connecting plate 12 is fixed by the fixing member 13. The fixing member 13 is preferably a screw.

One design scheme of the traditional waterproof motor is to install the ordinary motor on the housing, and achieve the waterproof sealing scheme through the housing seal. The disadvantage of this method is that the motor is too large; another design scheme for underwater waterproof motors It is to do waterproof and anti-corrosion treatments to the various parts of the motor, such as potting the stator core and coil with potting glue, epoxy spraying treatment on the magnet, hard anodizing on the housing fixing seat, and iron The shell is treated with electrophoretic paint, the bearings and motor shaft made of S316 stainless steel are selected, and the underwater outer rotor motor suitable for underwater use is assembled through the above measures. Its characteristics are small and high efficiency. The maximum thrust can reach 6kgf, but this The disadvantage of the motor is that sea water and sea sand are easy to enter the inside of the motor, which causes the motor to jam, the working life is shorter, and the after-sales maintenance cost is higher;

In contrast, the fully-sealed waterproof motor solution adopted by the present invention overcomes the shortcomings of the above-mentioned underwater waterproof motor and is compatible with the advantages of the two motors. Not only does it have reliable waterproof and sealing, high efficiency, and large thrust, but also the working life of the motor. It is also very long. The beneficial effects of the waterproof motor in the present invention are:

1. The stator adopts an integrated potting method. The stator assembly 15, the motor fixing plate 1, the first bearing bracket 2 and the casing 3 are integrally potted with epoxy resin, so that the motor stator is integrated.

2. The end cover 10 of the motor adopts a double sealing ring sealing method, and the end cover 10 and the casing 3 are connected by pressure riveting, so as to achieve the sealing of the end cover 10 and the casing 3;

3. The position where the main shaft of the inner rotor 6 extends out of the end cover uses a high-pressure oil seal, which can achieve a good sealing effect.

4. The split silicon steel sheet scheme is adopted to increase the slot full rate of the stator core winding, thereby improving the performance of the motor, so that it can match the corresponding duct and blades to achieve a thrust of 6kgf, and obtain the performance similar to that of the outer rotor. .

In summary, due to the reliable sealing of the motor as a whole, the waterproof motor proposed in the present invention can achieve no leakage at a depth of 50 meters underwater. The waterproof motor in the present invention overcomes the problem of motor jams caused by entering sea sand and seawater during use, greatly prolongs the working life of the motor, and improves the working life of the original 200 hours to 2000 hours, and reduces the working life of the motor. The cost of after-sales maintenance.

The waterproof motor provided by another embodiment of the present invention is a small underwater fully sealed waterproof inner rotor motor, the diameter of the waterproof motor can reach or less than 37.5 mm, and the height can reach or less than 56 mm. The waterproof motor can be adapted to consumer-level underwater drones, and the waterproof motor can also be used in underwater booster equipment; at the same time, the waterproof motor is also highly efficient, with corresponding ducts and blade thrusts It can reach 6kgf, and the output power of the waterproof motor is 240W; the biggest advantage of the waterproof motor is the fully sealed waterproof motor, sea water will not enter the inside of the waterproof motor, avoiding the phenomenon that the motor cannot work due to the crystallization of sea sand and sea water. , Which greatly improves the life of the waterproof motor. The waterproof motor can reach a working life of 2,000 hours, and its waterproof depth can reach a depth of 50 meters, which is suitable for most underwater drones and underwater boosters.

The above-mentioned embodiments are only used to illustrate the technical solutions of the present invention, but not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that it can still implement the foregoing various embodiments. The technical solutions recorded in the examples are modified, or some of the technical features are equivalently replaced; these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should be included in Within the protection scope of the present invention.

Claims

A waterproof motor, characterized in that it comprises a stator assembly, a housing, a motor fixing plate, a sealing assembly and an end cover, the stator assembly is sleeved inside the housing, and the motor fixing plate is placed on the At the first port of the casing, the stator assembly, the casing and the motor fixing plate are potted as an integral structure, and the second port of the casing is sealed by the sealing assembly and the end cover .
The waterproof motor according to claim 1, wherein the stator assembly includes a stator core, the stator core includes a plurality of split stator cores, and the split stator cores are arc-shaped I-shaped components, The arc-shaped I-shaped component is provided with a winding slot, and a plurality of the split stator cores can be surrounded to form a circular stator core.
The waterproof motor of claim 1, further comprising a first bearing bracket, and the first bearing bracket, the stator assembly, the casing, and the motor fixing plate are potted as an integral structure .
The waterproof motor of claim 1, wherein the stator assembly, the casing and the motor fixing plate are formed into an integral structure by potting epoxy resin.
The waterproof motor according to claim 1, further comprising an inner rotor, the inner rotor is placed in the accommodating cavity formed by the stator assembly, the inner rotor includes a main shaft and is installed on the main shaft On the inner rotor body.
The waterproof motor according to claim 5, further comprising a first bearing bracket arranged at the first port of the casing, and a first bearing and a second bearing are respectively sleeved on both ends of the main shaft , The end cover is provided with a second bearing bracket, the first bearing is placed in the first bearing bracket, and the second bearing is placed in the second bearing bracket.
The waterproof motor according to any one of claims 1 to 6, wherein the sealing assembly comprises a first sealing ring and a second sealing ring, and the first sealing ring and the second sealing ring are placed from the inside out. The second sealing ring and the end cover seal the second port of the casing.
The waterproof motor according to any one of claims 1-6, wherein the housing is a hollow cylinder, the motor fixing plate is a ring structure, the diameter of the waterproof motor is less than or equal to 37.5 mm, and the The height of the waterproof motor is less than or equal to 56 mm.
The waterproof motor of claim 5, further comprising a connecting plate, the connecting plate rotates with the main shaft, the connecting plate is used to connect an external device; the motor fixing plate is provided with a circuit connection The circuit connection board is used for external power connection.
The waterproof motor of claim 5, wherein the main shaft extends out of the end cover, an oil seal is provided on the outside of the end cover, and the main shaft extends out of the end cover through the oil seal. The location is sealed.