Variable frequency three-phase asynchronous motor for workover rig

Abstract

The utility model relates to a kind of frequency conversion three-phase asynchronous motor for workover rig, involve motor technical field, including motor body and cooling assembly, cooling assembly includes cooling jacket that is sleeved in the outer periphery of motor body along the radial direction of motor body, replacement fin that is evenly spaced distribution in the inner peripheral wall of cooling jacket and heat exchange platform being set to one end of cooling jacket, first cooling water channel is coiled in the inside of cooling jacket, second cooling water channel is coiled in the inside of replacement fin, third cooling water channel is coiled in the inside of heat exchange platform, first cooling water channel, second cooling water channel and third cooling water channel are sequentially communicated to form loop and are filled with cooling liquid, cooling fan is set on heat exchange platform and water pump, which pumps cooling liquid flows along first cooling water channel, second cooling water channel and third cooling water channel, replacement fin is abutted on the radiating fin on motor body. Its beneficial effect is that the heat transferred to the shell of motor body can be accelerated to dissipate, so as to improve the heat dissipation effect of motor.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, and in particular to a variable frequency three-phase asynchronous motor for well repair rigs. Background Technology

[0002] Well workover rigs, also known as well cleaning rigs, are power equipment used in the oil drilling and production field for downhole operations. They are mainly used for oil and water well maintenance, troubleshooting, and ultra-deep oil and gas development. Major domestic manufacturers include Jianghan No. 4 Machinery Plant, Nanyang No. 2 Machinery Plant, and Tianjin Haihe, all certified Tier 1 suppliers by CNPC and Sinopec. Their products cover lifting loads from 20 to 225 tons and include more than 20 types, such as truck-mounted, electric, and desert-specific models.

[0003] As heavy machinery, well workover rigs require a large amount of mechanical energy during their use. Common motors are prone to overload and overheating during the process of converting electrical energy into mechanical energy. If the motor is not cooled down in time, it can easily damage the high-power motor and affect its service life.

[0004] Conventional motors are cooled by air, which involves introducing outside air into the motor and carrying away the heat. Some high-end motors use water cooling, which involves arranging water cooling channels inside the motor casing and using flowing water to carry away the heat inside the motor. However, for heavy machinery motors, directly arranging water cooling channels inside the motor casing can easily affect its structural strength, so it is not suitable. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] In view of the above-mentioned shortcomings and deficiencies of the prior art, this utility model provides a variable frequency three-phase asynchronous motor for well workover rigs, which solves the technical problem of poor heat dissipation of variable frequency three-phase asynchronous motors for well workover rigs.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, the main technical solutions adopted by this utility model include:

[0009] This utility model provides a variable frequency three-phase asynchronous motor for a well workover rig, including a motor body and a cooling assembly fitted around the outer periphery of the motor body. The cooling assembly includes a cooling sleeve fitted around the outer periphery of the motor body in the radial direction, displacement fins evenly spaced circumferentially on the inner wall of the cooling sleeve, and a heat exchange platform disposed at one end of the cooling sleeve. A first cooling water channel is coiled inside the cooling sleeve, a second cooling water channel is coiled inside the displacement fins, and a third cooling water channel is coiled inside the heat exchange platform. The first, second, and third cooling water channels are sequentially connected to form a loop and filled with coolant. A cooling fan and a water pump that pumps coolant along the first, second, and third cooling water channels are disposed on the heat exchange platform. The displacement fins abut against the heat dissipation fins on the motor body.

[0010] This utility model proposes a variable frequency three-phase asynchronous motor for a well workover rig. A cooling jacket is fitted onto the motor body. A water pump pumps coolant from the first, second, and third cooling channels. When the motor is working, external air is introduced into the motor body, carrying away some heat. The remaining heat is directly transferred to the motor body casing. At this time, the heat dissipation fins on the motor body transfer the heat to the displacement fins. The coolant absorbs the heat from the displacement fins and then transfers the heat to the heat exchange platform. The heat is then dissipated by a cooling fan. This solution can accelerate the dissipation of heat transferred to the motor body casing, thereby improving the motor's heat dissipation effect.

[0011] Optionally, the heat exchange platform includes multiple vertically arranged and horizontally spaced heat-conducting fins, with airflow channels formed between adjacent heat-conducting fins, and two sets of cooling fans respectively installed at both ends of the heat exchange platform.

[0012] Heat is transferred to the heat-conducting fins, and two sets of cooling fans guide air to one side, allowing the air to quickly pass through the channels between adjacent heat-conducting fins, thereby quickly carrying away heat. This allows for better heat transfer during the coolant circulation process, improving the motor's heat dissipation effect.

[0013] Optionally, the heat-conducting fins and the displacement fins are formed by casting copper material.

[0014] By casting the heat-conducting fins and displacement fins from copper, the heat transfer effect is improved.

[0015] Optionally, the cross-sections of the second and third cooling channels are waist-shaped, and the cross-section of the first cooling channel is circular.

[0016] By setting the second and third cooling channels to have a waist-shaped cross-section, heat can be transferred more efficiently between the coolant, heat-conducting fins, and displacement fins with a larger contact area.

[0017] Optionally, the lower end of the cooling jacket is provided with two connecting seats that are connected and fixed to both sides of the motor body base.

[0018] By setting a connecting seat at the lower end of the cooling jacket, the connecting seat is connected and fixed to the base of the motor body after the cooling jacket is fitted onto the motor body, ensuring that the cooling components will not fall off due to vibrations generated when the motor body is working.

[0019] Optionally, external fins are arranged vertically and evenly on the outer peripheral wall of the cooling jacket.

[0020] The heat dissipation effect is enhanced by installing external fins on the outer peripheral wall of the cooling jacket.

[0021] Optionally, a gap for airflow is formed between adjacent external fins, and the cooling fan blows air toward the gap.

[0022] This allows the cooling fan to direct air into the gap between adjacent external fins, thereby blowing away the heat accumulated between the adjacent external fins and accelerating heat dissipation.

[0023] Optionally, the replacement fins are coated with thermally conductive silicone grease on the end face of the heat dissipation fins close to the motor body housing.

[0024] By applying thermally conductive silicone grease to the end face of the replacement fin that abuts the heat dissipation fin, the heat conduction effect can be enhanced, improving the heat dissipation effect of the motor. On the other hand, it can also reduce the vibration transmitted to the heat dissipation component when the motor is working, thereby extending the service life of the heat dissipation component.

[0025] (III) Beneficial Effects

[0026] The beneficial effects of this utility model are as follows: The variable frequency three-phase asynchronous motor for well workover rig of this utility model has a cooling jacket installed on the motor body. The coolant in the first, second and third cooling channels is pumped by a water pump, so that when the motor is working, external air is introduced into the motor body, thereby removing some heat. The remaining heat will be directly transferred to the outer shell of the motor body. At this time, the heat dissipation fins on the motor body transfer the heat to the displacement fins. After the coolant absorbs the heat from the displacement fins, it transfers the heat to the heat exchange platform, and the heat is discharged by the cooling fan. This solution can accelerate the dissipation of heat transferred to the outer shell of the motor body, thereby improving the heat dissipation effect of the motor. Attached Figure Description

[0027] Figure 1 This is a perspective view of an embodiment of the present utility model;

[0028] Figure 2 This is a schematic diagram of the cooling component in an embodiment of the present invention;

[0029] Figure 3 This is a first cross-sectional view of the cooling assembly;

[0030] Figure 4 This is a second cross-sectional view of the cooling assembly;

[0031] Figure 5 This is an exploded view of a heat exchange platform.

[0032] [Explanation of Labels in the Attached Image]

[0033] 1. Motor body; 2. Cooling assembly; 21. Cooling jacket; 211. First cooling channel; 22. Replacement fins; 221. Second cooling channel; 23. Heat exchange platform; 231. Third cooling channel; 232. Heat-conducting fins; 233. Cooling fan; 24. Water pump; 25. Connecting seat; 26. External fins. Detailed Implementation

[0034] To better explain and facilitate understanding of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0035] The variable frequency three-phase asynchronous motor for well workover rigs proposed in this embodiment features a cooling jacket mounted on the motor body. A water pump delivers coolant to the first, second, and third cooling channels, allowing external air to enter the motor body during operation, thus carrying away some heat. The remaining heat is directly transferred to the motor body casing. At this point, the heat dissipation fins on the motor body transfer heat to the displacement fins. The coolant absorbs the heat from the displacement fins and transfers it to the heat exchange platform, where a cooling fan dissipates the heat. This design accelerates the dissipation of heat transferred to the motor body casing, thereby improving the motor's heat dissipation effect.

[0036] To better understand the above technical solutions, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the present invention can be understood more clearly and thoroughly, and that the scope of the present invention can be fully conveyed to those skilled in the art.

[0037] Reference Figure 1 A variable frequency three-phase asynchronous motor for a well workover rig includes a motor body 1 and a cooling assembly 2 fitted onto the outer periphery of the motor body 1.

[0038] See Figure 2 , Figure 3 and Figure 4 The cooling assembly 2 includes a cooling sleeve 21 fitted around the outer periphery of the motor body 1 in the radial direction, displacement fins 22 evenly distributed on the inner wall of the cooling sleeve 21 in the circumferential direction, and a heat exchange platform 23 disposed at one end of the cooling sleeve 21. The cooling sleeve 21 has a first cooling water channel 211 coiled inside, the displacement fins 22 have a second cooling water channel 221 coiled inside, and the heat exchange platform 23 has a third cooling water channel 231 coiled inside. The first cooling water channel 211, the second cooling water channel 221 and the third cooling water channel 231 are connected in sequence to form a loop and filled with coolant. The heat exchange platform 23 is equipped with a cooling fan 233 and a water pump 24 that pumps coolant to flow along the first cooling water channel 211, the second cooling water channel 221 and the third cooling water channel 231. The displacement fins 22 abut against the heat dissipation fins on the motor body 1. When the motor is working, external air is introduced into the motor body 1, thereby carrying away some of the heat. The remaining heat will be directly transferred to the outer shell of the motor body 1. At this time, the heat dissipation fins on the motor body 1 transfer the heat to the displacement fins 22. After the coolant absorbs the heat from the displacement fins 22, it transfers the heat to the heat exchange platform 23. Finally, the heat is discharged through the cooling fan 233.

[0039] See Figure 4 and Figure 5 The heat exchange platform 23 includes multiple vertically arranged and horizontally spaced heat-conducting fins 232. Airflow channels are formed between adjacent heat-conducting fins 232. Two sets of cooling fans 233 are installed and bolted to both ends of the heat exchange platform 23. The two sets of cooling fans 233 guide air to one side, allowing the air to quickly pass through the channels between adjacent heat-conducting fins 232, thereby rapidly carrying away heat. This allows for better heat transfer during coolant circulation, improving the motor's heat dissipation effect.

[0040] The heat-conducting fins 232 and the displacement fins 22 are cast from copper. Brass has a higher thermal conductivity, resulting in better heat transfer.

[0041] See Figure 2 , Figure 3 and Figure 4 The second cooling channel 221 and the third cooling channel 231 have waist-shaped cross-sections, while the first cooling channel 211 has a circular cross-section. The waist-shaped cross-sections of the second cooling channel 221 and the third cooling channel 231 allow heat to be transferred more efficiently with a larger contact area between the coolant and the heat-conducting fins 232 and the displacement fins 22.

[0042] The lower end of the cooling sleeve 21 is integrally provided with two connecting seats 25 that are fixed to both sides of the base of the motor body 1 by bolts. This ensures that when the cooling sleeve 21 is fitted onto the motor body 1, the connecting seats 25 are connected and fixed to the base of the motor body 1, ensuring that the cooling component 2 will not fall off due to vibration generated by the motor body 1 during operation.

[0043] External fins 26 are arranged vertically and evenly on the outer peripheral wall of the cooling jacket 21 to enhance the heat dissipation effect of the cooling jacket 21.

[0044] A gap is formed between adjacent external fins 26 to allow airflow, and a cooling fan 233 blows air toward the gap. The cooling fan 233 guides air into the gap between adjacent external fins 26, thereby blowing away the heat accumulated between adjacent external fins 26 and accelerating heat dissipation.

[0045] The replacement fins 22 are coated with thermally conductive silicone grease on the end face of the heat dissipation fins close to the motor body 1. This enhances heat conduction and improves the motor's heat dissipation, while also reducing vibrations transmitted to the heat dissipation components during motor operation, thus extending the service life of the heat dissipation components.

[0046] In the description of this utility model, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0047] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0048] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "beneath" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0049] In the description of this specification, the terms "one embodiment," "some embodiments," "embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0050] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make modifications, alterations, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A variable frequency three-phase asynchronous motor for well workover rigs, characterized in that: The device includes a motor body (1) and a cooling assembly (2) fitted onto the outer periphery of the motor body (1). The cooling assembly (2) includes a cooling sleeve (21) fitted onto the outer periphery of the motor body (1) in the radial direction, displacement fins (22) evenly spaced circumferentially on the inner periphery of the cooling sleeve (21), and a heat exchange platform (23) disposed at one end of the cooling sleeve (21). A first cooling water channel (211) is coiled inside the cooling sleeve (21), and a second cooling water channel (221) is coiled inside the displacement fins (22). The heat exchange platform (23) has a third cooling water channel (231) coiled inside. The first cooling water channel (211), the second cooling water channel (221) and the third cooling water channel (231) are connected in sequence to form a loop and filled with coolant. The heat exchange platform (23) is equipped with a cooling fan (233) and a water pump (24) that pumps coolant to flow along the first cooling water channel (211), the second cooling water channel (221) and the third cooling water channel (231). The displacement fins (22) abut against the heat dissipation fins on the motor body (1).

2. The variable frequency three-phase asynchronous motor for well workover rigs as described in claim 1, characterized in that: The heat exchange platform (23) includes multiple heat-conducting fins (232) arranged vertically and distributed horizontally at intervals. A channel for air circulation is formed between adjacent heat-conducting fins (232). Two sets of cooling fans (233) are provided and respectively installed at both ends of the heat exchange platform (23).

3. The variable frequency three-phase asynchronous motor for well workover rigs as described in claim 2, characterized in that: The heat-conducting fins (232) and the displacement fins (22) are formed by casting copper material.

4. The variable frequency three-phase asynchronous motor for well workover rigs as described in claim 1, characterized in that: The second cooling channel (221) and the third cooling channel (231) have waist-shaped cross sections, while the first cooling channel (211) has a circular cross section.

5. The variable frequency three-phase asynchronous motor for well workover rigs as described in claim 1, characterized in that: The lower end of the cooling jacket (21) is provided with two connecting seats (25) that are connected and fixed to both sides of the base of the motor body (1).

6. The variable frequency three-phase asynchronous motor for well workover rigs as described in claim 1, characterized in that: The outer peripheral wall of the cooling jacket (21) is vertically and evenly spaced with external fins (26).

7. The variable frequency three-phase asynchronous motor for well workover rigs as described in claim 6, characterized in that: A gap for air circulation is formed between adjacent external fins (26), and the cooling fan (233) blows air toward the gap.

8. The variable frequency three-phase asynchronous motor for well workover rigs as described in claim 1, characterized in that: The replacement fins (22) are coated with thermally conductive silicone grease on the end face of the heat dissipation fins close to the outer shell of the motor body (1).

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