Motor protection device

Abstract

The utility model relates to a motor protection device, which relates to the technical field of motor protection, and comprises a protection base which is horizontally arranged and is used for installing and fixing a motor, a protection shell arranged at the upper end of the protection base, and an air inlet pipe which is arranged at one end of the protection shell and extends to the lower side of the protection base, a mounting cavity allowing the rear end of a motor to be inserted is formed in one end of the protective shell, an air inlet channel communicating with the mounting cavity is formed in the air inlet pipe, the air inlet end of the air inlet channel is located at the end away from the protective shell, and a filter screen is detachably arranged at the position, at an opening of the air inlet end of the air inlet channel, of the air inlet pipe. And external air enters through the filter screen, passes through the air inlet channel and the mounting cavity and then is sucked into the rear end of the motor. The motor has the advantages that the air inlet efficiency can be kept by replacing the filter screen regularly, normal use of the motor is not affected, and the motor is more convenient to use.

Description

Technical Field

[0001] This utility model relates to the field of motor protection technology, and in particular to a motor protection device. Background Technology

[0002] An electric motor (commonly known as a "motor") is an electromagnetic device that converts or transmits electrical energy based on the law of electromagnetic induction.

[0003] The structure of a three-phase asynchronous motor consists of a stator, a rotor, and other accessories. End covers provide support, bearings connect the rotating and stationary parts, bearing end covers protect the bearings, and fans cool the motor.

[0004] During motor operation, it is necessary to avoid overheating. Therefore, a fan at the rear of the motor draws air inward and blows it out from the bearing end cover at the front of the motor, thereby improving the motor's cooling efficiency. However, the working environment of motors varies. When the motor is working in a place with poor air quality, a large amount of dust and impurities will block the rear of the motor during the fan's air intake process, thus affecting the air intake efficiency. At the same time, during the dust cleaning process, dust can easily enter the motor's interior, thus affecting the motor's use. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a motor protection device, which solves the technical problem that a large amount of dust and impurities will block the rear end of the motor during the fan exhaust process, thereby affecting the air intake efficiency, and at the same time, dust can easily enter the motor during the dust cleaning process, thereby affecting the use of the motor.

[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 motor protection device, including a horizontally arranged protective base for mounting and fixing the motor, a protective shell disposed on the upper end of the protective base, and an air inlet pipe disposed at one end of the protective shell and extending to the lower side of the protective base. One end of the protective shell has an installation cavity into which the rear end of the motor is inserted. An air inlet channel communicating with the installation cavity is opened in the air inlet pipe. The air inlet end of the air inlet channel is located at the end away from the protective shell. A filter screen is detachably disposed at the air inlet end opening of the air inlet pipe and the air inlet channel. External air enters through the filter screen and is then drawn into the rear end of the motor after passing through the air inlet channel and the installation cavity.

[0010] This utility model provides a motor protection device. When using this device, the rear end of the motor is directly inserted into the mounting cavity of the protective shell, and then the motor and the protective base are installed together. When installing the motor, the protective base can be directly installed in the original mounting position. When the motor is working, the fan at the rear end of the motor directly draws air in. At this time, the external air is filtered by the filter screen and enters the mounting cavity along the air intake channel and is drawn into the motor, thereby preventing air carrying impurities from directly entering the motor and blocking the rear end, thus affecting the cooling effect of the motor. This solution extends the air intake end of the motor and filters it through the filter screen, so that the air intake efficiency can be maintained by replacing the filter screen at regular intervals without affecting the normal use of the motor, which is more convenient.

[0011] Optionally, the protective shell is coaxially provided with an air distribution ring inside the mounting cavity. The air distribution ring has an annular air duct that is connected to the air intake channel. The end of the air distribution ring near the opening of the mounting cavity has ventilation holes that are evenly spaced around the periphery and connected to the mounting cavity.

[0012] By setting an air distribution ring inside the protective shell, the air entering along the air intake channel will first enter the annular air duct, and then be blown out along the ventilation holes on the annular air duct. This allows the air to be drawn into the rear of the motor more evenly, improving the motor's heat dissipation effect.

[0013] Optionally, the protective shell has an air intake ring inside the mounting cavity that is aligned with and abuts against the rear air intake of the motor. The end of the air intake ring away from the rear of the motor abuts against the air distribution ring, and the ventilation hole is connected to the inner side of the air intake ring.

[0014] By setting an intake ring at the rear end of the motor, with one end of the intake ring abutting against the air distribution ring, the air drawn in along the intake channel can fully enter the rear end of the motor, reducing overflow and improving the motor's heat dissipation effect.

[0015] Optionally, the vent is spirally inclined to one side so that air forms a vortex and is blown out from inside the air intake ring.

[0016] By setting the ventilation holes to be spirally inclined to one side, the air blown out along the air distribution ring forms a vortex inside the air intake ring, thereby accelerating air circulation and improving the heat dissipation of the motor.

[0017] Optionally, the air intake ring is detachably connected to the rear end of the motor, and a sealing ring is coaxially provided on the end face of the air intake ring away from the motor, which abuts against the air distribution ring.

[0018] By detachably connecting the air intake ring to the rear end of the motor, the appropriate air intake ring can be replaced according to the size of the motor, making the motor protection device suitable for various specifications of motors, which is more convenient. At the same time, by setting a sealing ring at one end of the air intake ring, the air intake ring only needs to abut against one end of the air distribution ring to achieve a seal, thereby reducing air leakage.

[0019] Optionally, the air intake pipe extends horizontally to the lower end of the protective base and bends vertically downwards, and the protective base has shielding flanges extending vertically downwards from both sides parallel to the air intake pipe.

[0020] Air is ejected outward from the front of the motor, causing the air around the motor to quickly replenish the motor. As the air flows rapidly, it carries more dust and impurities. By setting vertical shielding flanges on both sides of the protective base, the air on both sides of the protective base cannot be directly drawn into the air intake pipe, thereby reducing the chance of dust and impurities in the air clogging the filter.

[0021] Optionally, each of the two shielding flanges, at one end away from the protective base, is vertically provided with a connecting flange that is fixed to the outside.

[0022] By setting a connecting flange at the lower end of the shielding flange, the entire motor protection device can be installed in conjunction with the motor, making it more convenient.

[0023] Optionally, the upper end face of the protective base is slidably provided with a fixed slide plate for fixing the motor, the upper end face of the protective base is provided with a "T"-shaped slide groove along the length direction, the lower end face of the fixed slide plate is provided with a "T"-shaped slider that is slidably inserted into the "T"-shaped slide groove, and the fixed slide plate and the protective base are fixed by bolts.

[0024] The fixed slide plate is slidably inserted into the T-shaped slide groove and connected to the upper end of the protective base via a T-shaped slider. This allows the motor to be directly fixed on the fixed slide plate when connecting the motor and the protective device. Then, the fixed slide plate is slid to the air intake ring at the rear end of the motor to abut against the air distribution ring. Finally, the fixed slide plate and the protective base are fixed with bolts, making the connection process between the motor and the protective device more convenient.

[0025] Optionally, the filter screen is provided in multiple ways, and the side end of the air intake pipe is provided with multiple slots that are evenly spaced vertically along the length direction and communicate with the air intake channel, and the filter screen is magnetically inserted into the slot.

[0026] By creating multiple slots on the air intake pipe and magnetically inserting the filter into the slots, each cleaning only requires removing the filter at the end furthest from the motor, making it more convenient.

[0027] (III) Beneficial Effects

[0028] The beneficial effects of this utility model are as follows: When using the motor protection device of this utility model, the rear end of the motor is directly inserted into the mounting cavity of the protective shell, and then the motor and the protective base are installed together. When installing the motor, the protective base can be directly installed in the original mounting position. When the motor is working, the fan at the rear end of the motor directly draws air. At this time, the external air is filtered by the filter screen and enters the mounting cavity along the air intake channel and is drawn into the motor, thereby preventing air carrying impurities from directly entering the motor and blocking the rear end, thus affecting the cooling effect of the motor. This solution extends the air intake end of the motor and filters it through the filter screen, so that the air intake efficiency can be maintained by replacing the filter screen at regular intervals, without affecting the normal use of the motor, which is more convenient. Attached Figure Description

[0029] Figure 1 This is a perspective view of an embodiment of the present utility model;

[0030] Figure 2 This is an exploded view of an embodiment of the present invention;

[0031] Figure 3 This is a cross-sectional view of an embodiment of the present utility model.

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

[0033] 1. Protective base; 11. Covering flange; 12. Connecting flange; 13. "T" shaped slide groove; 2. Protective shell; 21. Mounting cavity; 22. Air distribution ring; 221. Annular air duct; 222. Vent hole; 3. Air inlet pipe; 31. Air inlet channel; 32. Filter screen; 33. Slot; 4. Air inlet ring; 41. Sealing ring; 5. Fixing slide plate; 51. "T" shaped slider. 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 motor protection device proposed in this embodiment allows for direct insertion of the rear end of the motor into the mounting cavity of the protective housing. The motor and protective base are then installed together. Alternatively, the protective base can be directly installed in its original position. When the motor is operating, the fan at the rear end directly draws air in. External air, filtered by a filter, enters the mounting cavity along the air intake channel and is drawn into the motor. This prevents impurities from directly entering the motor and blocking the rear end, thus avoiding any impact on the motor's cooling effect. This solution extends the motor's air intake end and uses a filter, allowing for timed filter replacement to maintain airflow efficiency without affecting the motor's normal operation, making it more convenient.

[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 and Figure 2 A motor protection device includes a horizontally arranged protective base 1 for mounting and fixing the motor, a protective shell 2 disposed on the upper end of the protective base 1, and an air inlet pipe 3 disposed on one end of the protective shell 2 and extending to the lower side of the protective base 1.

[0038] See Figure 2 and Figure 3 The protective shell 2 has an installation cavity 21 at one end for inserting the rear end of the motor. The protective shell 2 has a wind distribution ring 22 coaxially arranged in the installation cavity 21. The wind distribution ring 22 has an annular air duct 221 in a ring shape. The end of the wind distribution ring 22 near the opening of the installation cavity 21 has ventilation holes 222 evenly spaced around the periphery and connected to the installation cavity 21. The air intake pipe 3 has an air intake channel 31 connected to the annular air duct 221. The air intake pipe 3 has a detachable filter screen 32 at the air intake end opening of the air intake channel 31. External air enters through the filter screen 32 and is then drawn into the rear end of the motor after passing through the air intake channel 31 and the installation cavity 21. When the motor is working, the fan at the rear of the motor draws air directly. At this time, the outside air is filtered by the filter screen 32 and enters the annular air duct 221 through the air intake channel 31. Then, it is blown out through the ventilation holes 222 on the annular air duct 221, so that the air can be drawn into the rear of the motor more evenly, improving the heat dissipation effect of the motor. At the same time, it prevents the air from carrying impurities directly into the motor and blocking the rear end, thus affecting the cooling effect of the motor.

[0039] The ventilation hole 222 is spirally inclined to one side so that the air forms a vortex inside the intake ring 4 and is blown out. The air blown out along the air distribution ring 22 forms a vortex inside the intake ring 4, thereby accelerating air circulation and improving the heat dissipation of the motor.

[0040] The protective shell 2 has an air intake ring 4 inside the mounting cavity 21, aligned with and abutting the rear air intake of the motor. The air intake ring 4 is detachably connected to the rear end of the motor. A sealing ring 41, which abuts against the air distribution ring 22, is coaxially positioned on the end face of the air intake ring 4 away from the motor. A vent 222 connects to the inner side of the air intake ring 4. The sealing ring 41 at one end of the air intake ring 4 abuts against the air distribution ring 22, allowing air drawn in along the air intake channel 31 to fully enter the rear end of the motor, reducing leakage and improving motor heat dissipation. Furthermore, the appropriate air intake ring 4 can be replaced according to the size of the motor, making this motor protection device suitable for various motor sizes and more convenient.

[0041] The intake pipe 3 extends horizontally to the lower end of the protective base 1 and bends vertically downward. The two ends of the protective base 1, parallel to the intake pipe 3, bend vertically downward and extend with shielding flanges 11. The ends of the two shielding flanges 11 away from the protective base 1 are each vertically provided with connecting flanges 12 fixed to the outside.

[0042] A fixed sliding plate 5 for fixing the motor is slidably mounted on the upper surface of the protective base 1. A "T"-shaped groove 13 is formed along the length of the upper surface of the protective base 1. A "T"-shaped slider 51, which slides into the "T"-shaped groove 13, is integrally provided on the lower surface of the fixed sliding plate 5. The fixed sliding plate 5 and the protective base 1 are fixed with bolts. When connecting the motor and the protection device, the motor can be directly fixed on the fixed sliding plate 5. Then, the fixed sliding plate 5 is slid until the air intake ring 4 at the rear end of the motor abuts against the air distribution ring 22. Finally, the fixed sliding plate 5 and the protective base 1 are fixed with bolts, making the connection process between the motor and the protection device more convenient.

[0043] Multiple filters 32 are provided. Multiple slots 33 are evenly spaced vertically along the length of the side end of the air intake pipe 3, which are connected to the air intake channel 31. The filters 32 are magnetically inserted into the slots 33.

[0044] 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.

[0045] 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.

[0046] 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.

[0047] 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.

[0048] 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 motor protection device, characterized in that: The device includes a horizontally positioned protective base (1) for mounting and fixing the motor, a protective shell (2) located on the upper end of the protective base (1), and an air inlet pipe (3) located at one end of the protective shell (2) and extending to the lower side of the protective base (1). One end of the protective shell (2) has an installation cavity (21) into which the rear end of the motor is inserted. The air inlet pipe (3) has an air inlet channel (31) connected to the installation cavity (21). The air inlet end of the air inlet channel (31) is located at the end away from the protective shell (2). A filter screen (32) is detachably installed at the air inlet end opening of the air inlet pipe (3) and the air inlet channel (31). External air enters through the filter screen (32) and is then drawn into the rear end of the motor through the air inlet channel (31) and the installation cavity (21).

2. The motor protection device as described in claim 1, characterized in that: The protective shell (2) is coaxially provided with an air distribution ring (22) in the mounting cavity (21). The air distribution ring (22) has an annular air duct (221) in a ring shape, which is connected to the air intake channel (31). The end of the air distribution ring (22) near the opening of the mounting cavity (21) has ventilation holes (222) that are evenly spaced around the circumference and connected to the mounting cavity (21).

3. The motor protection device as described in claim 2, characterized in that: The protective shell (2) has an air intake ring (4) inside the mounting cavity (21) that is aligned with and abuts against the rear air intake of the motor. The end of the air intake ring (4) away from the rear end of the motor abuts against the air distribution ring (22), and the ventilation hole (222) is connected to the inside of the air intake ring (4).

4. The motor protection device as described in claim 3, characterized in that: The ventilation hole (222) is spirally tilted to one side so that air is blown out in a vortex inside the air intake ring (4).

5. The motor protection device as described in claim 3, characterized in that: The air intake ring (4) is detachably connected to the rear end of the motor. The end face of the air intake ring (4) away from the motor is coaxially provided with a sealing ring (41) that abuts against the air distribution ring (22).

6. The motor protection device as described in claim 1, characterized in that: The air intake pipe (3) extends horizontally to the lower end of the protective base (1) and bends vertically downward. The protective base (1) extends vertically downward with shielding flanges (11) parallel to both sides of the air intake pipe (3).

7. The motor protection device as described in claim 6, characterized in that: Each of the two shielding flanges (11) having a connecting flange (12) fixed to the outside at one end away from the protective base (1) on the opposite side.

8. The motor protection device as described in claim 1, characterized in that: The upper end face of the protective base (1) is slidably provided with a fixed slide plate (5) for fixing the motor. The upper end face of the protective base (1) is provided with a "T"-shaped groove (13) along the length direction. The lower end face of the fixed slide plate (5) is provided with a "T"-shaped slider (51) that is slidably inserted into the "T"-shaped groove (13). The fixed slide plate (5) and the protective base (1) are fixed by bolts.

9. The motor protection device as described in claim 1, characterized in that: The filter screen (32) is provided in multiple ways. The side end of the air intake pipe (3) is provided with multiple slots (33) that are evenly spaced vertically along the length direction and connected to the air intake channel (31). The filter screen (32) is magnetically inserted into the slot (33).

Images