Oil immersion type motor

Abstract

The utility model discloses an oil immersion type motor, which relates to the technical field of oil immersion type motors and comprises a shell, an output shaft is rotatably connected in the shell, a rotor is fixedly connected to the outer side of the output shaft, a first sealing bearing is mounted between the output shaft and the inner wall of the shell, and a second sealing bearing is mounted between the output shaft and the inner wall of the shell. The outer side of the outer shell is fixedly connected with a sealing shell, a second sealing bearing is installed between the sealing shell and the output shaft, and the second sealing bearing is sealed with the output shaft and the sealing shell through sealing pieces. Preliminary sealing is carried out through the second sealing bearing, when a small amount of liquid enters the sealing shell from a gap between the output shaft and the second sealing bearing, the liquid enters the interior of the isolation cover, the liquid is guided through the protruding part in the isolation cover, the liquid flows into the through hole formed in the isolation cover, and the sealing shell is sealed through the second sealing bearing. And then the liquid flows to the flow guide plate from the through hole, and is guided by the flow guide plate, so that the liquid is discharged to the outside from a liquid outlet hole formed outside the sealing shell.

Description

Technical Field

[0001] The utility model relates to the technical field of oil-immersed motors, in particular to an oil-immersed motor. Background Art

[0002] An oil-immersed motor typically consists of a motor body, oil tank, cooler, oil pump, oil pipes, and seals. The motor body includes core components such as the windings, rotor, and stator. The windings are generally made of conductive materials such as copper wire and are immersed in insulating oil. Heat-generating components within the motor, such as the windings and bearings, are immersed in the highly insulating oil. Oil is pumped from the tank by an oil pump, cooled by a cooler, and then fed into the motor through the oil pipes, creating a reciprocating oil flow. The oil's cooling and lubricating properties maintain the motor's proper operation and effectively dissipate the heat generated during generator operation.

[0003] The existing motor output shaft is rotatably connected to the front end cover. Although the output shaft can be connected to external equipment to drive the external equipment to operate, the operating scenario of the motor will change with the different driving equipment according to the needs. For example, when the unit driven by the motor is an impeller in water, water will enter the interior of the shell through the rotating gap between the output shaft and the shell, causing the internal components of the plastic-sealed motor to be affected by water and damaged. For this reason, we propose an oil-immersed motor to solve the existing shortcomings. Utility Model Content

[0004] Technical problems solved

[0005] The purpose of this utility model is to make up for the shortcomings of the existing technology and provide an oil-immersed motor that can seal the rotating gap between the output shaft and the housing to prevent water from entering the housing, and can effectively take away the internal heat of the stator core and the peripheral radiation heat, with a good cooling effect, thereby facilitating user operation.

[0006] Technical Solution

[0007] To achieve the above-mentioned object, the present invention provides the following technical solution: an oil-immersed motor, comprising a housing, an output shaft being rotatably connected inside the housing, a rotor being fixedly connected to the outside of the output shaft, a first sealed bearing being installed between the output shaft and the inner wall of the housing, a sealed shell being fixedly connected to the outside of the housing, a second sealed bearing being installed between the sealed shell and the output shaft, the second sealed bearing being sealed to the output shaft and the sealed shell by a seal, an isolation cover being fixedly connected to the inner wall of the sealed shell, a guide plate being fixedly connected to the outer side of the isolation cover, a plurality of through holes being opened on the outer side of the isolation cover, a plurality of liquid outlet holes being opened on the outer side of the sealed shell, a stator core being fixedly connected to the inner wall of the housing, a separator being fixedly connected to the inner wall of the housing, an oil through hole being opened inside the stator core, an oil inlet pipe being fixedly connected to one side of the top of the housing, an oil outlet pipe being fixedly connected to the other side of the top of the housing, the bottom ends of the oil inlet pipe and the oil outlet pipe being communicated with the interior of the housing, and a raised portion being fixedly connected to the inner wall of one side of the isolation cover.

[0008] The utility model is further configured such that a sealing cover is fixedly connected to the outer side of the shell, and a sealing ring is fixedly installed between the inner wall of the sealing cover and the outer side of the sealing shell.

[0009] The present invention is further configured such that the stator core is located between the outer shell and the separation sleeve.

[0010] The present invention is further configured such that the output shaft and the rotor are located inside the separation sleeve.

[0011] The utility model is further configured such that the inner wall of the isolation cover is rotatably connected to the outer side of the output shaft, the outer side of the guide plate is fixedly connected to the inner wall of the sealing shell, the shape of the guide plate is annular, the inner ring of the guide plate corresponds to the through hole, the outer ring of the guide plate corresponds to the liquid outlet hole, a sealing plug is connected to the inner thread of the liquid outlet hole, the shape of the raised portion is a circular ring with a high middle and a low outer portion, and the outer side of the raised portion corresponds to the through hole.

[0012] Beneficial effects

[0013] 1. The utility model performs preliminary sealing through the second sealed bearing. When a small amount of liquid enters the sealed shell from the gap between the output shaft and the second sealed bearing, the liquid enters the interior of the isolation cover, and is guided by the raised portion inside the isolation cover to flow into the through hole opened on the isolation cover, and then flows from the through hole to the guide plate. Subsequently, the liquid is guided by the guide plate to be discharged to the outside through the liquid outlet hole opened outside the sealed shell, thereby realizing liquid discharge, which can greatly prevent liquid from entering the shell, and further reduce the situation where oil and water enter the shell and cause damage to the components inside the shell.

[0014] 2. The utility model forms an oil cavity between the separator sleeve and the inner wall of the shell. The cooling oil is introduced into the shell from the oil inlet pipe, so that the cooling oil enters the oil cavity between the separator sleeve and the shell. The cooling oil directly contacts the stator core, which can effectively take away the heat of the stator core. At the same time, the coolant can flow through each stator core through the oil holes, which can effectively take away the internal heat of the stator core and the peripheral radiant heat.

[0015] Other advantages, objectives and features of the present invention will be described in part in the following description and will be apparent to those skilled in the art based on an examination of the following or may be learned from the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the overall structure of the motor of the present utility model;

[0017] Figure 2 This is a schematic diagram of the cross-sectional structure of the motor of the present utility model;

[0018] Figure 3 This is a cross-sectional view of the local structure of the motor of the utility model;

[0019] Figure 4 This is a cross-sectional view of the local structure of the motor of the utility model;

[0020] Figure 5 This is a cross-sectional view of the motor sealing shell structure of the utility model;

[0021] Figure 6 This is a cross-sectional view of the structure of the motor isolation cover of the utility model;

[0022] Figure 7 This is a schematic diagram of a partial cross-sectional structure of another motor of the present invention;

[0023] Figure 8 This is a schematic diagram of the local structure of the motor of the present utility model.

[0024] In the figure: 1. outer casing; 2. output shaft; 3. rotor; 4. first sealed bearing; 5. sealed shell; 6. second sealed bearing; 7. isolation cover; 8. guide plate; 9. through hole; 10. liquid outlet; 11. sealing cover; 12. sealing ring; 13. stator core; 14. separator sleeve; 15. oil hole; 16. oil inlet pipe; 17. oil outlet pipe; 18. raised part. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] like Figure 1-8 As shown, the utility model provides a technical solution: an oil-immersed motor, comprising a housing 1, an output shaft 2 is rotatably connected to the inside of the housing 1, a rotor 3 is fixedly connected to the outside of the output shaft 2, a first sealed bearing 4 is installed between the output shaft 2 and the inner wall of the housing 1, a sealing shell 5 is fixedly connected to the outside of the housing 1, a second sealed bearing 6 is installed between the sealing shell 5 and the output shaft 2, the second sealed bearing 6 is sealed to the output shaft 2 and the sealing shell 5 through a seal, an isolation cover 7 is fixedly connected to the inner wall of the sealing shell 5, a guide plate 8 is fixedly connected to the outside of the isolation cover 7, a plurality of through holes 9 are opened on the outside of the isolation cover 7, a plurality of liquid outlet holes 10 are opened on the outside of the sealing shell 5, and a protrusion 18 is fixedly connected to the inner wall of one side of the isolation cover 7;

[0027] The second sealed bearing 6 is used for preliminary sealing. When a small amount of liquid enters the sealed shell 5 from the gap between the output shaft 2 and the second sealed bearing 6, the liquid enters the interior of the isolation cover 7. The isolation cover 7 guides the liquid so that the liquid flows from the through hole 9 provided on the outside of the isolation cover 7 to the guide plate 8. Subsequently, the liquid is guided by the guide plate 8 to be discharged from the liquid outlet 10 provided on the outside of the sealed shell 5 to the outside, thereby realizing the discharge of the liquid, which can greatly prevent the liquid from entering the shell.

[0028] like Figure 1 、 Figure 3 、 Figure 4 、 Figure 5 and Figure 6 As shown, the inner wall of the isolation cover 7 is rotatably connected to the outer side of the output shaft 2, the outer side of the guide plate 8 is fixedly connected to the inner wall of the sealing shell 5, the guide plate 8 is in the shape of a circular ring, the inner ring of the guide plate 8 corresponds to the position of the through hole 9, the outer ring of the guide plate 8 corresponds to the position of the liquid outlet hole 10, the liquid outlet hole 10 is internally threaded with a sealing plug, the shape of the protrusion 18 is a circular ring with a high center and a low outside, and the outer side of the protrusion 18 corresponds to the through hole 9;

[0029] The sealing ring 12 can seal the gap between the sealing shell 5 and the outer side of the outer shell 1 to prevent liquid from entering from the connection between the sealing shell 5 and the outer shell 1, thereby improving the sealing effect. The internal thread of the liquid outlet 10 is connected with a sealing plug, which is removed when drainage is required.

[0030] like Figure 1 、 Figure 2 、 Figure 7 and Figure 8 As shown, a stator core 13 is fixedly connected to the inner wall of the housing 1, and a separator sleeve 14 is fixedly connected to the inner wall of the housing 1. The stator core 13 is located between the housing 1 and the separator sleeve 14. The output shaft 2 and the rotor 3 are located inside the separator sleeve 14. An oil hole 15 is opened inside the stator core 13. An oil inlet pipe 16 is fixedly connected to one side of the top of the housing 1, and an oil outlet pipe 17 is fixedly connected to the other side of the top of the housing 1. The bottom ends of the oil inlet pipe 16 and the oil outlet pipe 17 are connected to the interior of the housing 1.

[0031] An oil chamber is formed between the separator sleeve 14 and the inner wall of the outer shell 1. Cooling oil is introduced into the outer shell 1 through the oil inlet pipe 16, so that the cooling oil enters the oil chamber between the separator sleeve 14 and the outer shell 1. The cooling oil directly contacts the stator core 13 and can effectively remove the heat of the stator core 13. At the same time, the coolant can flow through each stator core 13 through the oil hole 15, which can effectively remove the internal heat of the stator core 13 and the peripheral radiant heat.

[0032] Working principle: When in use, the second sealed bearing 6 is sealed with the output shaft 2 and the sealing shell 5 through the sealing member. When the sealing member of the second sealed bearing 6 ages or is worn, the liquid can enter the interior of the isolation cover 7 from the gap between the second sealed bearing 6 and the output shaft 2 and the sealing shell 5. Figure 4 After the liquid enters the interior of the isolation cover 7, the liquid falls onto the raised portion 18. Due to the shape of the raised portion 18 being higher inside and lower outside, the liquid flows outward along the raised portion 18, causing the liquid to flow into the through hole 9 opened on the isolation cover 7, and then flows from the through hole 9 to the guide plate 8. Then, the liquid flows along the guide plate 8 to the liquid outlet 10 and is discharged to the outside, thereby achieving liquid discharge, reducing the situation where the liquid enters the interior of the shell 1, and further improving the waterproof effect of the internal components of the shell 1. The sealing ring 12 can seal the gap between the sealing shell 5 and the outside of the shell 1 to prevent liquid from entering from the connection between the sealing shell 5 and the shell 1, thereby improving the sealing effect. The internal thread of the liquid outlet 10 is connected with a sealing plug. The sealing plug is removed when drainage is required. The sealing plug in the liquid outlet 10 is used to prevent water from entering the sealing shell 5 from the liquid outlet 10 in daily life.

[0033] During cooling, an oil chamber is formed between the separator sleeve 14 and the inner wall of the outer shell 1. The cooling oil is introduced into the outer shell 1 from the oil inlet pipe 16, so that the cooling oil enters the oil chamber between the separator sleeve 14 and the outer shell 1. The cooling oil directly contacts the stator core 13 and can effectively take away the heat of the stator core 13. At the same time, the coolant can flow through each stator core 13 through the oil hole 15, which can effectively take away the internal heat of the stator core 13 and the peripheral radiant heat. The cooling oil is finally discharged through the oil outlet pipe 17.

[0034] It will be understood that in the development of any actual embodiment, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but for those of ordinary skill having the benefit of this disclosure, the development effort will be a routine task of design, fabrication, and production without undue experimentation.

[0035] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, and all of these should be included in the scope of the claims of the present invention.

Claims

1. An oil-immersed motor, comprising a housing (1), characterized in that: The output shaft (2) is rotatably connected to the interior of the housing (1), the outer side of the output shaft (2) is fixedly connected to the rotor (3), a first sealed bearing (4) is installed between the output shaft (2) and the inner wall of the housing (1), a sealed shell (5) is fixedly connected to the outer side of the housing (1), a second sealed bearing (6) is installed between the sealed shell (5) and the output shaft (2), the second sealed bearing (6) is sealed with the output shaft (2) and the sealed shell (5) through a sealing member, an isolation cover (7) is fixedly connected to the inner wall of the sealing shell (5), a guide plate (8) is fixedly connected to the outer side of the isolation cover (7), and the isolation cover (7) is fixedly connected to the outer side of the isolation cover (7). Several through holes (9) are opened on the outside, several liquid outlet holes (10) are opened on the outside of the sealing shell (5), the inner wall of the shell (1) is fixedly connected to the stator core (13), the inner wall of the shell (1) is fixedly connected to the separation sleeve (14), the inside of the stator core (13) is opened with an oil through hole (15), one side of the top of the shell (1) is fixedly connected to the oil inlet pipe (16), the other side of the top of the shell (1) is fixedly connected to the oil outlet pipe (17), the bottom ends of the oil inlet pipe (16) and the oil outlet pipe (17) are communicated with the inside of the shell (1), and one side of the inner wall of the isolation cover (7) is fixedly connected to a protrusion (18).

2. The oil-immersed motor according to claim 1, characterized in that: A sealing cover (11) is fixedly connected to the outer side of the housing (1), and a sealing ring (12) is fixedly installed between the inner wall of the sealing cover (11) and the outer side of the sealing shell (5).

3. The oil-immersed motor according to claim 1, characterized in that: The stator core (13) is located between the housing (1) and the separation sleeve (14).

4. The oil-immersed motor according to claim 1, characterized in that: The output shaft (2) and the rotor (3) are located inside the separation sleeve (14).

5. The oil-immersed motor according to claim 1, characterized in that: The inner wall of the isolation cover (7) is rotatably connected to the outer side of the output shaft (2), the outer side of the guide plate (8) is fixedly connected to the inner wall of the sealing shell (5), the shape of the guide plate (8) is annular, the inner ring of the guide plate (8) corresponds to the position of the through hole (9), the outer ring of the guide plate (8) corresponds to the position of the liquid outlet hole (10), the inner thread of the liquid outlet hole (10) is connected to a sealing plug, the shape of the protrusion (18) is a circular ring with a high center and a low outside, and the outer side of the protrusion (18) corresponds to the through hole (9).

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