Deepwater motor driving assembly

Abstract

The deepwater motor driving assembly comprises a motor and a speed reducer, the output end of the motor is connected with the input end of the speed reducer to transmit kinetic energy, the joint end of the motor is connected with the joint end of the speed reducer, the motor and the speed reducer jointly define a closed cavity, the closed cavity is connected with a first pressure compensation device, and the first pressure compensation device is connected with a second pressure compensation device. And oil liquid used for balancing external water pressure is filled in the valve body. The working environment of the deepwater motor driving assembly is underwater, if external water enters a closed cavity, the external water easily enters the motor and the speed reducer along a gap between the front side end face of the motor and the rear side end face of the speed reducer, and therefore equipment is damaged. According to the technical scheme disclosed by the invention, the oil liquid is injected into the closed cavity, and the external water pressure is balanced by using the oil liquid through pressurization of the pressure compensation device I, so that the possibility of water invasion is reduced to a certain extent, and the waterproof performance of equipment is improved.

Description

Technical Field

[0001] The utility model mainly relates to the technical field of motor drive, in particular to a deep-water motor drive assembly. Background Art

[0002] With the development of marine resources and the deepening of marine scientific research, the demand for underwater robots and underwater equipment is increasing. Due to the continuous advancement of power electronics technology, high-performance power electronics devices and control technologies have been widely used, making it possible to achieve efficient power conversion and control in underwater environments. Underwater electric drive technology requires the use of efficient and compact motors to drive related actuators. With the continuous development of motor technologies such as permanent magnet synchronous motors and brushless DC motors, the performance of underwater electric drive technology has been significantly improved.

[0003] In the existing motor drive assembly, the connection structure between the motor and the reducer has a poor sealing effect and is prone to water seepage under water pressure, making it unsuitable for deep-sea environments. Therefore, a deep-sea motor drive assembly with better sealing effect is needed. Utility Model Content

[0004] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a deep-water motor drive assembly.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0006] A deepwater motor drive assembly includes a motor and a reducer, wherein the output end of the motor is connected to the input end of the reducer to transfer kinetic energy, the coupling end of the motor is connected to the coupling end of the reducer, and the two together enclose a closed cavity, the closed cavity is connected to a pressure compensation device, and is filled with oil for balancing the external water pressure.

[0007] As a further improvement of the above technical solution:

[0008] The motor includes a casing one, an annular stator is fixedly installed on the inner side of the casing one, a rotor is inserted in the central channel of the stator, and the output end of the rotor passes through the front end of the casing one and is connected to the input end of the reducer to transfer kinetic energy; the casing one is connected to the pressure compensation device two, and the interior is filled with oil for balancing the external water pressure.

[0009] The front section of the rotor is connected to the casing via a front bearing, and the rear section of the rotor is connected to the casing via a rear bearing; a sealing ring is provided on the front side of the front bearing.

[0010] The sealing ring 1 is configured as a double-layer lip sealing ring.

[0011] The housing 1 comprises a housing body with an opening at the rear end, and a sealing end cover detachably mounted on the rear end of the housing body; a sealing ring 2 is arranged between the housing body and the end cover.

[0012] The motor also includes an annular electromagnetic brake fixed at a rear section of the housing for braking, and the rotor is inserted into the electromagnetic brake.

[0013] The motor also includes an encoding mechanism, which includes a support 1 fixed to the tail end of the rotor and a magnet arranged on the support 1, and a support 2 fixedly connected to the housing 1 and an encoder arranged on the support 2, and the encoder is directly opposite to the magnet.

[0014] The reducer comprises a housing 2 and a rotating shaft, which are connected via a bearing; a sealing ring 3 is arranged on the rear side of the bearing.

[0015] The reducer is formed with an oil filling hole communicating with the closed cavity.

[0016] A sealing ring 4 is provided on the joint surface between the motor and the reducer.

[0017] Compared with the prior art, the advantages of the utility model are:

[0018] The output end of the motor is located in the front direction, and the input end of the reducer is located in the rear direction. While the output end of the motor is connected to the input end of the reducer, the front end face of the motor fits with the rear end face of the reducer. At this time, the motor and the reducer are connected with bolts or other forms, and the joint end of the motor and the joint end of the reducer together enclose a closed cavity. Since the working environment of the deep-water motor drive assembly is underwater, if external water enters the closed cavity, it is easy to enter the interior of the two along the gap between the front end face of the motor and the rear end face of the reducer, thereby causing damage to the equipment. The technical solution disclosed in the present application injects oil into the closed cavity, pressurizes it through a pressure compensation device to use the oil to balance the external water pressure, thereby reducing the possibility of water intrusion to a certain extent and improving the waterproof performance of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional schematic diagram of the deepwater motor drive assembly;

[0020] Figure 2 is a front view schematic diagram of the deepwater motor drive assembly;

[0021] Figure 3 is a cross-sectional schematic diagram of a deepwater motor drive assembly;

[0022] Figure 4 yes Figure 3 The enlarged schematic diagram of point A in the middle;

[0023] Figure 5yes Figure 3 The enlarged schematic diagram of point B in the middle;

[0024] Figure 6 It is a cross-sectional schematic diagram of the reducer.

[0025] The numbers in the figure represent: 1. Motor; 11. Casing 1; 111. Shell; 112. End cover; 113. Sealing ring 2; 12. Stator; 13. Rotor; 14. Front bearing; 15. Rear bearing; 16. Sealing ring 1; 17. Electromagnetic brake; 18. Encoding mechanism; 181. Support 1; 182. Magnet; 183. Support 2; 184. Encoder; 19. Pressure compensation device 2; 2. Reducer; 21. Casing 2; 22. Rotating shaft; 23. Bearing; 24. Sealing ring 3; 25. Oil filling hole; 3. Sealed cavity; 4. Sealing ring 4. DETAILED DESCRIPTION

[0026] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0027] Example

[0028] like Figures 1 to 6 As shown, the deepwater motor drive assembly of this embodiment includes a motor 1 and a reducer 2, the output end of the motor 1 is connected to the input end of the reducer 2 to transfer kinetic energy, the joint end of the motor 1 is connected to the joint end of the reducer 2, and the two together enclose a closed cavity 3, the closed cavity 3 is connected to a pressure compensation device 1 (not shown in the figure), and the inside is filled with oil for balancing the external water pressure. Specifically, the motor 1 selects a frameless motor, the output end of the motor 1 is located in the front direction, the input end of the reducer 2 is located in the rear direction, the output end of the motor 1 is connected to the input end of the reducer 2, and the front side end face of the motor 1 (i.e., the joint end of the motor 1) is in contact with the rear side end face of the reducer 2 (i.e., the joint end of the reducer 2), at this time, the motor 1 and the reducer 2 are connected by bolts or other forms, and the joint end of the motor 1 and the joint end of the reducer 2 together enclose a closed cavity 3. Since the working environment of the deepwater motor drive assembly is underwater, if external water enters the closed cavity 3, it is easy to enter the interior of the motor 1 and the rear end surface of the reducer 2 along the gap between the front end surface of the motor 1 and the rear end surface of the reducer 2, thereby causing damage to the equipment. The technical solution disclosed in this application injects oil into the closed cavity 3, pressurizes it through a pressure compensation device, and uses the oil to balance the external water pressure, thereby reducing the possibility of water intrusion to a certain extent and improving the waterproof performance of the equipment.

[0029] In this embodiment, the motor 1 includes a housing 11, a ring-shaped stator 12 is fixedly installed on the inner side of the housing 11, a rotor 13 is inserted in the central channel of the stator 12, and the output end of the rotor 13 passes through the front end of the housing 11 and connects with the input end of the reducer 2 to transfer kinetic energy; the housing 11 is connected to the pressure compensation device 2 19, and the interior is filled with oil for balancing the external water pressure. On the one hand, since the closed cavity 3 is filled with oil, in order to prevent the oil from entering the housing 11 from the gap on the front end face of the motor 1 due to the pressure difference, it is necessary to inject oil into the housing 11 to form a balance. On the other hand, the working environment of the deep-water motor drive assembly is underwater, and the external water body will squeeze the motor 1. By injecting oil into the housing 11 and pressurizing it through the pressure compensation device 2 19 to balance the external water pressure with the oil, the possibility of water intrusion is reduced to a certain extent, so as to improve the waterproof performance of the equipment.

[0030] In this embodiment, the front section of the rotor 13 is connected to the housing 11 via the front bearing 14, and the rear section is connected to the housing 11 via the rear bearing 15; a sealing ring 16 is provided on the front side of the front bearing 14. By providing the sealing ring 16, the liquid exchange on both sides of the sealing ring can be effectively blocked, thereby reducing the possibility of water intrusion to a certain extent and improving the waterproof performance of the equipment. Furthermore, the sealing ring 16 is configured as a double-layer lip sealing ring. This type of sealing ring has an excellent sealing effect. Of course, in other embodiments, the sealing ring 16 can also be configured in other forms according to actual needs, which is not limited here.

[0031] In this embodiment, the housing 11 includes a housing 111 with an opening at the rear end, and a sealing end cover 112 detachably mounted on the rear end of the housing 111; a sealing ring 113 is provided between the housing 111 and the end cover 112. The motor 1 also includes an annular electromagnetic brake 17 fixed to the rear end of the housing 11 for braking, and the rotor 13 is inserted into the electromagnetic brake 17. The motor 1 also includes an encoding mechanism 18, which includes a support 181 fixed to the rear end of the rotor 13 and a magnet 182 arranged on the support 181, as well as a support 183 fixedly connected to the housing 11 and an encoder 184 arranged on the support 183, and the encoder 184 is directly opposite to the magnet 182. By setting the housing 11 as a two-end structure, during maintenance, the operator can directly observe and contact the electromagnetic brake 17 and the encoding mechanism 18 by removing the end cover 112, thereby effectively reducing the difficulty of operation. At the same time, by providing a sealing ring 113 between the shell body 111 and the end cover 112, the possibility of water intrusion can be reduced to a certain extent, thereby improving the waterproof performance of the equipment.

[0032] In this embodiment, the reducer 2 includes a housing 21 and a rotating shaft 22, which are connected via a bearing 23; a sealing ring 3 24 is provided on the rear side of the bearing 23. By providing the sealing ring 3 24, the liquid exchange on both sides of the sealing ring can be effectively blocked, thereby reducing the possibility of water intrusion to a certain extent, so as to improve the waterproof performance of the equipment. Further, the housing 21 is connected to the pressure compensation device 3 (not shown in the figure), and is filled with oil for balancing the external water pressure. On the one hand, since the closed cavity 3 is filled with oil, in order to prevent the oil from entering the housing 21 from the gap on the front end face of the reducer 2 due to the pressure difference, it is necessary to inject oil into the housing 21 to form a balance. On the other hand, the working environment of the deep-water motor drive assembly is underwater, and the external water body will squeeze the reducer 2. By injecting oil into the housing 21 and pressurizing it through the pressure compensation device 3 to balance the external water pressure with the oil, the possibility of water intrusion is reduced to a certain extent, so as to improve the waterproof performance of the equipment.

[0033] In this embodiment, the reducer 2 is formed with an oil filling hole 25 communicating with the closed cavity 3. By providing the oil filling hole 25, the closed cavity 3 can be communicated with the external space to add oil.

[0034] In this embodiment, a sealing ring 44 is provided at the joint surface of the motor 1 and the reducer 2. By providing the sealing ring 44, the liquid exchange on both sides of the sealing ring can be effectively blocked, and the sealing ring 44 and the oil in the closed cavity 3 form a double protection, thereby reducing the possibility of water intrusion to a certain extent, so as to improve the waterproof performance of the equipment.

[0035] It should be noted that the electromagnetic brake 17, magnet 182, encoder 184, pressure compensation device 1, pressure compensation device 2 19 and pressure compensation device 3 are all commercially available products, and their structures, assemblies and working principles are all existing technologies and will not be elaborated here.

[0036] Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technician familiar with the art can use the above disclosed technical content to make many possible changes and modifications to the technical solution of the present invention without departing from the scope of the technical solution of the present invention, or modify it into an equivalent embodiment of equivalent changes. Therefore, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention should fall within the scope of protection of the technical solution of the present invention.

Claims

1. A deepwater motor drive assembly, comprising a motor (1) and a reducer (2), wherein the output end of the motor (1) is connected to the input end of the reducer (2) to transfer kinetic energy, and is characterized in that: The joint end of the motor (1) is connected to the joint end of the reducer (2), and the two together enclose a closed cavity (3). The closed cavity (3) is connected to a pressure compensation device and is filled with oil for balancing external water pressure.

2. The deepwater motor drive assembly according to claim 1 is characterized in that: The motor (1) comprises a casing (11), an annular stator (12) is fixedly mounted on the inner side of the casing (11), a rotor (13) is inserted into the central channel of the stator (12), and the output end of the rotor (13) passes through the front end of the casing (11) and is connected to the input end of the reducer (2) to transmit kinetic energy; the casing (11) is connected to a pressure compensation device (19), and is filled with oil for balancing external water pressure.

3. The deepwater motor drive assembly according to claim 2 is characterized in that: The front section of the rotor (13) is connected to the casing (11) via a front bearing (14), and the rear section is connected to the casing (11) via a rear bearing (15); a sealing ring (16) is provided on the front side of the front bearing (14).

4. The deepwater motor drive assembly according to claim 3 is characterized in that: The sealing ring 1 (16) is configured as a double-layer lip sealing ring.

5. The deepwater motor drive assembly according to claim 2 is characterized in that: The housing (11) comprises a housing (111) with an opening at the rear end, and a sealing end cover (112) detachably mounted on the rear end of the housing (111); a sealing ring (113) is provided between the housing (111) and the end cover (112).

6. The deepwater motor drive assembly according to claim 2 is characterized in that: The motor (1) also includes an annular electromagnetic brake (17) fixed to the rear section of the housing (11) and used for braking, and the rotor (13) is inserted into the electromagnetic brake (17).

7. The deepwater motor drive assembly according to claim 2 is characterized in that: The motor (1) further comprises an encoding mechanism (18), the encoding mechanism (18) comprising a support (181) fixed to the rear end of the rotor (13) and a magnet (182) arranged on the support (181), and a support (183) fixedly connected to the housing (11) and an encoder (184) arranged on the support (183), wherein the encoder (184) faces the magnet (182).

8. The deepwater motor drive assembly according to claim 1 is characterized in that: The reducer (2) comprises a second housing (21) and a rotating shaft (22), which are connected via a bearing (23); a third sealing ring (24) is provided on the rear side of the bearing (23).

9. The deepwater motor drive assembly according to claim 8, characterized in that: The reducer (2) is formed with an oil injection hole (25) communicating with the sealed cavity (3).

10. The deepwater motor drive assembly according to any one of claims 1 to 9, characterized in that: A sealing ring four (4) is provided on the joint surface between the motor (1) and the reducer (2).

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