CN111786497A

CN111786497A - Underwater outer rotor sand prevention motor and propeller

Info

Publication number: CN111786497A
Application number: CN202010680859.7A
Authority: CN
Inventors: 刘威; 王哲; 王思奥; 朱明陵; 熊淦
Original assignee: Shenzhen Chasing-Innovation Technology Co ltd
Current assignee: Shenzhen Chasing-Innovation Technology Co ltd
Priority date: 2020-07-15
Filing date: 2020-07-15
Publication date: 2020-10-16

Abstract

The invention discloses an underwater outer rotor sand prevention motor and a propeller, and relates to the technical field of underwater outer rotor motors. The motor comprises a front end cover, a magnetic yoke, a rear end cover and a rotating shaft, one end of the rotating shaft is fixedly connected with one end of the front end cover, the other end of the rotating shaft is fixed in a hollow shaft of the rear end cover through a bearing, the other end of the front end cover is fixedly connected with one end of the magnetic yoke, the end part of the rear end cover is provided with a wear-resisting ring, the other end of the magnetic yoke is positioned in the wear-resisting ring, and. The underwater propeller comprises the motor, a propeller connected with the front end cover and a propeller shell connected with the rear end cover. Reduce the opening clearance between motor stator and rotor through wear-resisting ring, utilize the characteristics that wear-resisting ring coefficient of friction is little, under the prerequisite that does not have extra special requirement to motor parts processing and assembly, the very big reduction of clearance will be assembled also makes wear-resisting ring's life obtain guaranteeing for the motor possesses fine sand prevention effect, can not appear advancing the sand damage card dead phenomenon.

Description

Underwater outer rotor sand prevention motor and propeller

Technical Field

The invention relates to the technical field of underwater outer rotor motors, in particular to an underwater outer rotor sand prevention motor and a propeller.

Background

An underwater propeller is an important power component of underwater equipment, and particularly, an ROV (remote operated vehicle) usually carries a plurality of propellers to realize the movement of each attitude under water. The propeller is mainly composed of a propeller and a motor, and is widely applied to various small and medium-sized submergence vehicles, propellers and other products due to the characteristics of simple and compact structure, small volume, light weight, simple and reliable sealing and the like. Under the condition of the same volume, the power and the moment provided by the outer rotor motor are both larger than those of other types of motors, and the outer rotor motor has obvious advantages, so that the outer rotor motor is mostly used as a power source of the propeller. In order to prevent the motor from being damaged by water inflow, the stator and the winding of the motor are encapsulated, and parts which are easy to corrode are subjected to anti-corrosion treatment, so that the underwater outer rotor motor used in deeper water is obtained.

In order to facilitate the mutual movement between the rotor and the stator of the motor, a sufficient assembly gap is reserved between the rotor and the stator, water can enter the motor from the gap when underwater, particularly an air gap between a stator iron core and a magnet, the air gap is usually smaller and generally ranges from 0.4mm to 1.5mm for large driving force of the motor, the assembly gap between the rotor and the stator is generally ranges from 0.5mm to 1mm, particularly, the stator material generally cannot cope with the friction of larger sand stones, the sand stones are abraded quickly after entering, the stator is damaged, and the gap between the rotor and the stator is further increased. When the underwater motor runs under the water with a complex environment, gravels enter the motor along with water flow, the large gravels can scratch the anticorrosive coating inside the motor to cause the corrosion failure of components, and some gravels can directly enter the air gap to cause the motor to be blocked. The occurrence of the above situation can be reduced by reducing the opening gap between the rotor and the stator, but the stator and the rotor are also required to have higher processing precision and assembly precision, so that the cost is greatly increased, and the production efficiency is influenced.

Disclosure of Invention

The invention aims to provide an underwater sand-proof motor with an outer rotor and a propeller, and solves the problem that the existing motor is damaged and stuck due to sand feeding.

In order to solve the technical problems, the invention adopts the following technical scheme: the utility model provides an outer rotor sand prevention motor under water which characterized in that: including front end housing, yoke, rear end cap and pivot, pivot one end and front end housing one end fixed connection, the other end passes through the bearing to be fixed in the hollow shaft of rear end cap, the front end housing other end and yoke one end fixed connection, and the rear end cap tip is provided with wear ring, and the yoke other end is located wear ring, and the yoke lateral wall suits with wear ring inside lateral wall.

The further technical scheme is that the unilateral clearance between the outer side wall of the magnet yoke and the inner side wall of the wear-resisting ring is less than or equal to 0.1 mm.

The rear end cover is composed of a hollow shaft and a rear cover fixing plate, a fixing hole is formed in the rear cover fixing plate, one end of the hollow shaft is fixedly connected with the fixing hole, and a wire passing hole is formed in the rear cover fixing plate.

The further technical scheme is that the outer side wall of the hollow shaft is sleeved with a stator winding.

The front end cover is provided with a through hole, the side wall of the through hole is provided with a rotating shaft fixing hole, one end of the rotating shaft is inserted into the through hole, and the rotating shaft is fixedly connected with the front end cover through the rotating shaft fixing hole by a set screw.

The further technical scheme is that magnets are uniformly arranged on the front end cover in the circumferential direction and are matched with the magnet yoke.

The invention also adopts the following technical scheme: an underwater propulsor characterized by: the underwater sand prevention motor with the outer rotor comprises the underwater sand prevention motor, and further comprises a propeller fixedly connected with a front end cover and a propeller shell fixedly connected with a rear end cover.

The propeller shell is further characterized by comprising a fixing frame and a guide pipe, wherein the fixing frame is provided with a rear cover fixing hole, the bottom of the rear cover fixing hole protrudes outwards to form a boss, and the height of the boss is matched with the thickness of the wear-resisting ring.

The further technical scheme is that connecting rods are uniformly distributed on the outer side wall of the fixing frame in the circumferential direction and are connected with the inner side wall of the guide pipe.

The technical scheme is that the propeller comprises a fixed guide part, a blade fixing pipe and blades, the fixed guide part is fixed on the front end cover through a fastener, the end part of the fixed guide part extends outwards to form the blade fixing pipe, the blade fixing pipe and the magnet yoke are coaxially arranged, and the blades are circumferentially and uniformly distributed on the outer side wall of the blade fixing pipe.

The working principle is as follows: the rotor is assembled from the front end cover, the magnet and the magnet yoke, and then the rotor is tightly pressed on the front end cover through a set screw after being assembled in place, so that the assembly gap between the wear-resistant ring and the magnet yoke is ensured, and the assembly of the outer rotor sand-proof motor is completed. And then, installing a blade fixing pipe of the propeller along the magnet yoke, fixing the blade fixing pipe on the front end cover through a fastener after the blade fixing pipe is in place, installing a guide pipe of the shell of the propeller along the blade, and fixing the blade fixing pipe on the rear end cover through the fastener after the blade fixing pipe is in place to finish the assembly of the underwater propeller.

When the underwater propeller works, the rotor rotates around the stator, the rotor drives the propeller to rotate, the blades and water generate relative motion, and equipment carrying the underwater propeller is driven to move underwater by the reverse acting force of the water.

In this in-process, because the existence of wear-resisting ring, the fit-up gap of wear-resisting ring inside wall and yoke lateral wall is less than the air gap, is less than 0.1mm for inside big grit can't get into the motor along with rivers, the grit that the particle diameter is less than fit-up gap gets into the motor back and flows along with rivers again, can not cause the motor dead phenomenon of card to appear in the air gap, and the grit that the particle diameter is little is limited to the scotch of anticorrosive coating, has promoted external rotor electric machine's life like this greatly.

Compared with the prior art, the invention has the beneficial effects that: through the wear-resisting ring that uses wear-resisting material to make, reach and reduce the opening clearance between motor stator and rotor, utilize the characteristics that wear-resisting ring coefficient of friction is little, can be under the prerequisite that does not have extra special requirement to motor parts processing and assembly, also enable wear-resisting ring's life when reducing the very big reduction of fit-up gap and obtain guaranteeing, the reduction of fit-up gap makes the motor possess fine sand prevention effect, the dead phenomenon of sand feeding damage card can not appear.

Drawings

Fig. 1 is an assembly schematic diagram of an underwater outer rotor sand prevention motor.

Fig. 2 is a schematic structural diagram of the rear end cap.

Fig. 3 is a schematic structural view of the front end cap.

Fig. 4 is a schematic view of the assembly of the underwater propeller.

Fig. 5 is a schematic structural view of a propeller housing.

Fig. 6 is a schematic structural view of the propeller.

In the figure: 1-front end cover, 101-through hole, 102-rotating shaft fixing hole, 2-magnetic yoke, 3-rear end cover, 301-hollow shaft, 302-rear cover fixing plate, 4-rotating shaft, 5-wear ring, 6-stator winding, 7-magnet, 8-bearing, 9-propeller, 901-fixed guide part, 902-blade fixing tube, 903-blade, 10-propeller shell, 11-fixing frame, 1101-rear cover fixing hole, 1102-boss, 1103-connecting rod and 12-guide pipe.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Fig. 1 shows an underwater sand-prevention motor with an outer rotor, which comprises a front end cover 1, a magnetic yoke 2, a rear end cover 3 and a rotating shaft 4.

As shown in fig. 3, the front end cover 1 is provided with a through hole 101, the side wall of the through hole 101 is provided with a rotating shaft fixing hole 102, during assembly, one end of the rotating shaft 4 is inserted into the through hole 101, and after the assembly is in place, the rotating shaft 4 is pressed into the through hole 101 of the front end cover 1 through the rotating shaft fixing hole 102 by a set screw, so that the rotating shaft 4 is fixedly connected with the front end cover 1.

As shown in fig. 2, the rear end cap 3 is composed of a hollow shaft 301 and a rear cap fixing plate 302, the rear cap fixing plate 302 is provided with a fixing hole, one end of the hollow shaft 301 is fixedly connected with the fixing hole, and the rear cap fixing plate 302 is provided with a wire passing hole.

As shown in figure 1, the underwater sand-proof motor with the outer rotor is assembled, wherein a rotating shaft 4 is fixed in a hollow shaft 301 through a bearing 8, and a shaft seal is arranged at one side close to a rear end cover 3. The outer side wall of the hollow shaft 3 is sleeved with a stator winding 6, and the end part of the rear cover fixing plate 302 is provided with a wear-resistant ring 5 in an interference fit mode. Equally divide the assembly with magnet 7 along the hoop on front end housing 1, fix yoke 2 on front end housing 1 again and constitute the rotor, pack the rotor into from 2 one end of pivot for pivot 2 wears out from through-hole 101 on the front end housing 1, and the assembly is in place the back compresses tightly pivot 2 in front end housing 1's through-hole 101 through holding screw. After the assembly is completed, the assembly clearance of the outer side wall of the wear-resisting ring and the outer side wall of the magnetic yoke is unilateral and is less than or equal to 0.1 mm.

Fig. 4 shows an underwater propeller using the above-described outer rotor sand-prevention motor, with a propeller 9 fixed to a front end cover 1 and a propeller housing 10 fixed to a rear end cover 3.

As shown in fig. 5, the propeller housing 10 is composed of a fixing frame 11 and a guide pipe 12, the fixing frame 11 is provided with a rear cover fixing hole 1101, the bottom of the rear cover fixing hole 1101 protrudes outwards to form a boss 1102, the height of the boss 1102 is adapted to the thickness of the wear-resistant ring 5, and the wear-resistant ring 5 is provided with a relief hole of the boss 1102. The boss 1102 effectively clears the wear ring 5, so that the wear ring 5 is not deformed by extrusion after the propeller housing 10 and the rear end cover 3 are fixed. The outer side wall of the fixing frame 11 is circumferentially and uniformly distributed with connecting rods 1103, and the connecting rods 1103 are connected with the inner side wall of the guide pipe 12.

As shown in fig. 6, the propeller 9 is composed of a fixed guide portion 901, a blade fixing tube 902 and blades 903, the fixed guide portion 901 is fixed on the front end cover 1 through a fastener, the end portion of the fixed guide portion 901 extends outwards to form the blade fixing tube 902, the blade fixing tube 902 and the yoke 2 are coaxially arranged, and the blades 903 are circumferentially and uniformly distributed on the outer side wall of the blade fixing tube 902.

During assembly, the blade fixing tube 902 of the propeller 9 is installed along the magnet yoke 2, fixed on the front end cover 1 through a fastener after being in place, the guide tube 12 of the propeller shell 10 is installed along the blades 903, and fixed on the rear end cover 3 through the fastener after being in place, so that the underwater propeller is assembled.

During operation, the rotor rotates around the stator, the rotor drives the propeller 9 to rotate, the blades 903 and water generate relative motion, and equipment carrying the underwater propeller is driven to move underwater by the reverse acting force of the water.

In this process, because the existence of wear-resisting ring 5, the fit-up gap of 5 inside walls of wear-resisting ring and 2 outside walls of magnet yoke is less than the air gap, be less than 0.1mm for inside big grit can't get into the motor along with rivers, the grit that the particle diameter is less than the fit-up gap gets into the motor back and flows along with rivers again, can not be to the card in the air gap, can not cause the motor dead phenomenon of card to appear, and the grit that the particle diameter is little is limited to the scotch of anticorrosive coating, the life of external rotor motor has been promoted so greatly.

Although the invention has been described herein with reference to a number of illustrative embodiments thereof, it should be understood that numerous other modifications and embodiments can be devised by those skilled in the art that will fall within the spirit and scope of the principles of this disclosure. More particularly, various variations and modifications are possible in the component parts and/or arrangements within the scope of the disclosure, the drawings and the appended claims. In addition to variations and modifications in the component parts and/or arrangements, other uses will also be apparent to those skilled in the art.

Claims

1. The utility model provides an outer rotor sand prevention motor under water which characterized in that: including front end housing (1), yoke (2), rear end cap (3) and pivot (4), pivot (4) one end and front end housing (1) one end fixed connection, the other end passes through bearing (8) and fixes in hollow shaft (301) of rear end cap (3), the front end housing (1) other end and yoke (2) one end fixed connection, rear end housing (3) tip is provided with wear ring (5), yoke (2) other end is located wear ring (5), yoke (2) lateral wall suits with wear ring (5) inside wall.

2. The underwater outer rotor sand-prevention motor as claimed in claim 1, wherein: the unilateral clearance between the outer side wall of the magnetic yoke (2) and the inner side wall of the wear-resistant ring (5) is less than or equal to 0.1 mm.

3. The underwater outer rotor sand-prevention motor as claimed in claim 1, wherein: the rear end cover (3) is composed of a hollow shaft (301) and a rear cover fixing plate (302), a fixing hole is formed in the rear cover fixing plate (302), one end of the hollow shaft (301) is fixedly connected with the fixing hole, and a wire passing hole is formed in the rear cover fixing plate (302).

4. The underwater outer rotor sand-prevention motor as claimed in claim 3, wherein: and the outer side wall of the hollow shaft (301) is sleeved with a stator winding (6).

5. The underwater outer rotor sand-prevention motor as claimed in claim 1, wherein: the front end cover (1) is provided with a through hole (101), the side wall of the through hole (101) is provided with a rotating shaft fixing hole (102), one end of a rotating shaft (4) is inserted into the through hole (101), and the rotating shaft (4) is fixedly connected with the front end cover (1) through the rotating shaft fixing hole (102) by a set screw.

6. The underwater outer rotor sand-prevention motor as claimed in claim 5, wherein: the front end cover (1) is uniformly provided with magnets (7) in the circumferential direction, and the magnets (7) are matched with the magnetic yoke (2).

7. An underwater propulsor characterized by: the underwater sand control motor with the outer rotor comprises the underwater sand control motor with the outer rotor as claimed in any one of claims 1 to 6, and further comprises a propeller (9) fixedly connected with the front end cover (1) and a propeller shell (10) fixedly connected with the rear end cover (3).

8. An underwater propeller as claimed in claim 7, wherein: the propeller shell (10) is composed of a fixing frame (11) and a guide pipe (12), a rear cover fixing hole (1101) is formed in the fixing frame (11), the bottom of the rear cover fixing hole (1101) protrudes outwards to form a boss (1102), and the height of the boss (1102) is matched with the thickness of the wear-resistant ring (5).

9. An underwater propeller as claimed in claim 8, wherein: connecting rods (1103) are evenly distributed on the outer side wall of the fixing frame (11) in the circumferential direction, and the connecting rods (1103) are connected with the inner side wall of the guide pipe (12).

10. An underwater propeller as claimed in claim 7, wherein: the propeller (9) is composed of a fixed guide part (901), a blade fixing pipe (902) and blades (903), the fixed guide part (901) is fixed on the front end cover (1) through a fastener, the end part of the fixed guide part (901) extends outwards to form the blade fixing pipe (902), the blade fixing pipe (902) and the magnet yoke (2) are coaxially arranged, and the blades (903) are circumferentially and uniformly distributed on the outer side wall of the blade fixing pipe (902).