Explosion-proof and rubber-sealed joint motor for coal mine
The explosion-proof and glue-sealed joint motor for coal mines, which integrates the reducer, encoder, driver and motor, solves the problem of excessive size and weight of existing robot dog joint motors, and realizes a safe and compact drive solution in underground coal mines.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- SHANXI KEDA AUTOMATION CONTROL
- Filing Date
- 2026-06-23
- Publication Date
- 2026-07-21
AI Technical Summary
The existing joint motors used in underground robotic dogs in coal mines lack modular and integrated design, resulting in excessive size and weight, making them unsuitable for driving robotic dogs.
An explosion-proof and glue-sealed joint motor for coal mines was designed, integrating the reducer, encoder, driver and motor together. The main explosion-proof components are composed of an output sealed end cover, an output explosion-proof cavity, a main motor explosion-proof cavity and a potted explosion-proof cavity. Through specific material and structural design, it meets the coal mine safety GB/T3836 standard and achieves a compact overall structure.
It achieves a compact and lightweight design that meets safety standards in coal mine gas environments, making it suitable for driving underground robot dogs in coal mines.
Smart Images
Figure CN122437298A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of explosion-proof robot dog technology for coal mines, specifically to an explosion-proof and glue-sealed joint motor for coal mines. Background Technology
[0002] Mining environments, such as underground coal mines, often contain flammable and explosive substances like gas and coal dust. The terrain is rugged and full of obstacles, posing risks such as collapses and toxic gas leaks. Manual inspections and material transport operations are extremely unsafe. Robotic dogs, with their excellent terrain adaptability, have become ideal equipment to replace manual labor in tasks such as mine inspections, emergency rescues, and material transfers.
[0003] The articulated motor is the core component for a robot dog to achieve movement and function. All gaits (such as walking, running, and climbing), movement accuracy (such as turning and obstacle crossing), and even load capacity of the robot dog highly depend on the performance of the articulated motor. The articulated motor integrates the motor, reducer, encoder, driver, and brake into a single articulated module (i.e., an integrated articulated motor), reducing the size by more than 30%, which facilitates the assembly and maintenance of the robot dog.
[0004] Although there are various types of explosion-proof motors suitable for use in underground mines, they are either not modularly integrated integrated joint motors, or they are too large and heavy to be used for driving robot dogs.
[0005] Therefore, how to provide an explosion-proof and glue-sealed joint motor for coal mines has become a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention
[0006] To address at least one technical problem in the background art, this invention provides an explosion-proof and glue-sealed joint motor for coal mines, which fully complies with the requirements for use in Class I coal mine gas environments according to the GB / T3836 standard for coal mine safety. Furthermore, it integrates the reducer, encoder, driver, and motor together, resulting in a compact, small, and lightweight overall structure, making it ideal for driving underground mining robots in coal mines.
[0007] To achieve the above objectives, the present invention provides an explosion-proof and glue-sealed joint motor for coal mines, comprising: an output sealing end cover, an output explosion-proof cavity, an integral annular radiator, a main explosion-proof cavity of the motor, an explosion-proof cover, and a potted explosion-proof cavity. The bottom end of the output explosion-proof cavity is connected to the output sealing end cover, and the top end is connected to the main explosion-proof cavity of the motor. The explosion-proof cover is fixedly installed on the top end of the main explosion-proof cavity of the motor, and the potted explosion-proof cavity is fixedly installed on the explosion-proof cover. The main explosion-proof components are formed by the output explosion-proof cavity, the main explosion-proof cavity of the motor, and the potted explosion-proof cavity in sequence.
[0008] Furthermore, the output explosion-proof cavity includes: an output shaft, an oil seal, four fastening bolts, a deep groove ball bearing, an explosion-proof copper sleeve, a countersunk hexagonal screw, and one fastening bolt. The explosion-proof copper sleeve is pressed into the housing of the output explosion-proof cavity with an interference fit and is locked and fixed to the output explosion-proof cavity by the countersunk hexagonal screw. The flange end face of the output shaft is fixedly mounted on the output end face of the planetary reducer by screws. The outer ring of the deep groove ball bearing is clearance-fitted with the housing of the output explosion-proof cavity, and the inner ring of the deep groove ball bearing is clearance-fitted with the housing of the output explosion-proof cavity. The output shaft transition fits, and the output sealing end cover is locked to the output explosion-proof cavity end face by four fastening bolts to press the deep groove ball bearing. The oil seal is pressed into the output sealing end cover, and the inner ring sealing lip of the oil seal fits against the output shaft. The output explosion-proof cavity is fixed to the main explosion-proof cavity of the motor by one fastening bolt. A cylindrical explosion-proof mating surface is formed between the output explosion-proof cavity and the main explosion-proof cavity of the motor. A cylindrical rotating explosion-proof mating surface is formed between the inner cylindrical surface of the explosion-proof copper sleeve and the outer cylindrical surface of the output shaft.
[0009] Furthermore, the main explosion-proof cavity of the motor includes: a planetary reducer, a main explosion-proof housing, a motor stator, a motor rotor, three fastening bolts, and an encoder plate. The motor stator is pressed into the main explosion-proof housing with an interference fit. The bottom and inner cylindrical surface of the motor stator are respectively attached to the bottom plane and outer vertical surface of the main explosion-proof housing. The planetary reducer is inserted into the cylindrical surface of the inner center hole of the main explosion-proof housing with a clearance fit and is fixed to the bottom end face of the main explosion-proof housing with screws. The encoder plate is installed and fixed on the side of the explosion-proof cover near the explosion-proof cavity. The lower gear shaft of the motor rotor is inserted into the planetary reducer. The upper bearing of the motor rotor is inserted into the side of the explosion-proof cover near the explosion-proof cavity. The inner and outer cylindrical surfaces of the motor rotor maintain a uniform circumferential clearance with the outer cylindrical surface of the motor stator and the inner cylindrical surface of the main explosion-proof housing, respectively. The explosion-proof cover and the main explosion-proof housing are connected and fixed by three fastening bolts.
[0010] Furthermore, the main explosion-proof cavity of the motor also includes a sealing ring, wherein the contact surface between the explosion-proof cover and the main explosion-proof shell of the motor is an explosion-proof mating surface, and the sealing ring is placed in a sealing groove on the explosion-proof mating surface of the main explosion-proof shell of the motor.
[0011] Furthermore, the encapsulated explosion-proof cavity includes: an explosion-proof through-wall terminal block, a control board, an encapsulation shell, and a glue injection cap. The control board is fixed to the top of the explosion-proof cover with screws. The explosion-proof through-wall terminal block is screwed into the explosion-proof cover. The encapsulation shell is fixed to the explosion-proof cover with two fastening bolts. A cable inlet nozzle is welded onto the encapsulation shell, and all edges in contact with the encapsulation shell are sealed with K-704 silicone sealant. Then, the prepared encapsulation compound is poured into the encapsulation shell in one go until it is flush with the upper surface of the encapsulation shell. After the encapsulation compound has been allowed to cure, the glue injection cap is fixed with screws.
[0012] Further, the raw materials of the encapsulation compound include, by weight, 100 parts of bisphenol A epoxy resin, 85-95 parts of methyltetrahydrophthalic anhydride, 150-200 parts of crystalline silica powder, 50-100 parts of fused silica powder, 1-2 parts of silane coupling agent, and 0.5-1 parts of defoamer. The preparation process is as follows: fused silica powder is baked at 120℃, and after pretreatment with silane coupling agent, it is added together with bisphenol A epoxy resin and defoamer into a vacuum planetary mixer for thorough wetting and degassing; the temperature is lowered to 40-50℃, preheated methyltetrahydrophthalic anhydride and crystalline silica powder are added, and then vacuum stirred; the mixture is slowly poured into a 60℃ preheated mold under vacuum, and cured in gradients of 80℃ / 2h, 120℃ / 4h, and 150℃ / 2h. After demolding, there are no cracks or bubbles in the appearance, and the encapsulation compound finally passes all type tests of GB / T 3836.9.
[0013] Furthermore, the power supply line and communication line of the motor stator are led out through the groove on the inner wall of the motor main explosion-proof shell and welded to the lower cable of the explosion-proof through-wall terminal. The upper cable of the explosion-proof through-wall terminal is led out and welded to the drive control board. The power supply line and communication line are introduced into the horn mouth through the cable and locked, then introduced into the potted explosion-proof cavity and welded to the drive control board.
[0014] Furthermore, during the injection of the potting compound into the potting shell, the power lines, communication lines, and control board inside the potting explosion-proof cavity are potted into a single unit.
[0015] Furthermore, a flat heat-conducting copper tube containing heat-conducting fluid is embedded in the bottom of the main explosion-proof housing of the motor, and an integral annular heat sink is attached to the bottom surface and adjacent outer cylindrical surface of the main explosion-proof housing of the motor. The heat of the motor stator is conducted to the outside through the main explosion-proof housing of the motor, the flat heat-conducting copper tube, and the integral annular heat sink in sequence.
[0016] The beneficial effects of this invention are as follows: This invention fully complies with the requirements for use in Class I coal mine gas environments according to the GB / T3836 standard for coal mine safety. It integrates the reducer, encoder, driver and motor into one unit, resulting in a compact structure, small size and light weight, making it very suitable for driving underground robot dogs in coal mines. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of an explosion-proof structure for the motor output terminal. Figure 3 This is a schematic diagram of the explosion-proof structure of the motor stator and rotor. Figure 4 This is a cross-sectional view of the main explosion-proof enclosure for the motor. Figure 5 A schematic diagram of an explosion-proof structure for a motor drive control board with a potting type. Figure 6 Schematic diagram of motor stator heat dissipation structure Figure 1 ; Figure 7 Schematic diagram of motor stator heat dissipation structure Figure 2 .
[0018] In the figure: 1-Output sealing end cap; 3-Fasting bolt one; 2-Output explosion-proof chamber; 4-Integral annular radiator; 5-Main motor explosion-proof chamber; 6-Explosion-proof cover; 7-Fasting bolt two; 8-Pouring explosion-proof chamber; 9-Cable inlet flare; 21-Output shaft; 22-Oil seal; 23-Fasting bolt four; 24-Deep groove ball bearing; 25-Explosion-proof copper sleeve; 26-Hex socket countersunk screw; 41-Flat heat-conducting copper tube; 51-Planetary reducer; 52-Main motor explosion-proof shell; 53-Motor stator; 54-Motor rotor; 55-Fasting bolt three; 56-Sealing ring; 57-Encoder board; 81-Explosion-proof through-wall terminal; 82-Drive control board; 83-Pouring shell; 84-Glue injection cap; A-Bottom plane; B-Outer vertical surface; C-Bottom end face; D-Internal center hole. Detailed Implementation
[0019] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0020] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this application described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.
[0021] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.
[0022] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.
[0023] Furthermore, the terms "installation," "setup," "equipped with," "connection," "linking," and "socketing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; 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, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.
[0024] To achieve the above objectives, such as Figure 1 As shown, this invention provides an explosion-proof and glue-sealed joint motor for coal mines, comprising: an output sealing end cover 1, an output explosion-proof cavity 2, an integral annular radiator 4, a main motor explosion-proof cavity 5, an explosion-proof cover 6, and a potted explosion-proof cavity 8. The bottom end of the output explosion-proof cavity 2 is connected to the output sealing end cover 1, and the top end is connected to the main motor explosion-proof cavity 5. The explosion-proof cover 6 is fixedly installed on the top end of the main motor explosion-proof cavity 5, and the potted explosion-proof cavity 8 is fixedly installed on the explosion-proof cover 6. The main explosion-proof components are formed by the output explosion-proof cavity 2, the main motor explosion-proof cavity 5, and the potted explosion-proof cavity 8.
[0025] like Figure 2As shown, the output explosion-proof cavity 2 includes: an output shaft 21, an oil seal 22, four fastening bolts 23, a deep groove ball bearing 24, an explosion-proof copper sleeve 25, a countersunk hexagonal screw 26, and a fastening bolt 3. The explosion-proof copper sleeve 25 is pressed into the housing of the output explosion-proof cavity 2 with an interference fit and is locked and fixed to the output explosion-proof cavity 2 by the countersunk hexagonal screw 26. The flange end face of the output shaft 21 is fixedly mounted on the output end face of the planetary reducer 51 by screws. The outer ring of the deep groove ball bearing 24 is clearance-fitted with the housing of the output explosion-proof cavity 2, and the inner ring of the deep groove ball bearing 24 is transition-fitted with the output shaft 21. The output sealing end cover 1 is locked by four fastening bolts 23. The deep groove ball bearing 24 is fixed to the end face of the output explosion-proof cavity 2 and pressed. The oil seal 22 is pressed into the inside of the output sealing end cover 1. The inner sealing lip of the oil seal 22 fits against the output shaft 21. The output explosion-proof cavity 2 is fixed to the main explosion-proof cavity 5 of the motor by fastening bolt 3. A cylindrical explosion-proof mating surface is formed between the output explosion-proof cavity 2 and the main explosion-proof cavity 5 of the motor. A cylindrical rotating explosion-proof mating surface is formed between the inner cylindrical surface of the explosion-proof copper sleeve 25 and the outer cylindrical surface of the output shaft 21. The above two explosion-proof designs fully comply with the requirements for use in coal mine gas environments in "GB / T3836.2-2021 Explosive Atmospheres - Part 2: Equipment Protected by Explosion-proof Enclosures 'd'".
[0026] like Figures 3-4 As shown, the main explosion-proof cavity 5 of the motor includes: a planetary reducer 51, a main explosion-proof housing 52, a motor stator 53, a motor rotor 54, three fastening bolts 55, a sealing ring 56, and an encoder plate 57. The motor stator 53 is pressed into the main explosion-proof housing 52 with an interference fit. The bottom and inner cylindrical surface of the motor stator 53 are respectively attached to the bottom plane A and outer vertical surface B of the main explosion-proof housing 52. The planetary reducer 51 is inserted into the cylindrical surface of the inner center hole D of the main explosion-proof housing 52 with a clearance fit and is fixed to the bottom end face C of the main explosion-proof housing 52 by screws. The encoder plate 57 is installed and fixed on the explosion-proof housing. On the side of the cover 6 near the explosion-proof cavity, the lower gear shaft of the motor rotor 54 is inserted into the planetary reducer 51, and the upper bearing of the motor rotor 54 is inserted into the side of the explosion-proof cover 6 near the explosion-proof cavity. The inner and outer cylindrical surfaces of the motor rotor 54 maintain a uniform circumferential gap with the outer cylindrical surface of the motor stator 53 and the inner cylindrical surface of the main explosion-proof enclosure 52, respectively. The explosion-proof cover 6 and the main explosion-proof enclosure 52 are connected and fixed by fastening bolts 3 55. The contact surface between the explosion-proof cover 6 and the main explosion-proof enclosure 52 is the explosion-proof mating surface, and the sealing ring 56 is placed in the sealing groove on the explosion-proof mating surface of the main explosion-proof enclosure 52. The above explosion-proof design fully complies with the requirements for use in coal mine gas environments in GB / T3836.2-2021 Explosive Atmospheres Part 2 Equipment Protected by Explosion-proof Enclosures "d".
[0027] like Figure 5As shown, the encapsulated explosion-proof cavity 8 includes: an explosion-proof through-wall terminal block 81, a control board 82, an encapsulation shell 83, and a glue injection cap 84. The control board 82 is fixed to the top of the explosion-proof cover 6 with screws. The explosion-proof through-wall terminal block 81 is screwed into the explosion-proof cover 6. The encapsulation shell 83 is fixed to the explosion-proof cover 6 with fastening bolts 7. A cable inlet nozzle 9 is welded onto the encapsulation shell 83, and all edges in contact with the encapsulation shell 83 are sealed with K-704 silicone sealant. Then, the prepared encapsulation compound is poured into the encapsulation shell 83 in one go until it is flush with the upper surface of the encapsulation shell 83. After the encapsulation compound has been allowed to cure, the glue injection cap 84 is fixed with screws. The above encapsulation explosion-proof design fully complies with the requirements for use in coal mine gas environments in GB / T3836.9-2021 Explosive Atmospheres Part 9 Equipment Protected by Encapsulation 'm'.
[0028] To further optimize the technical solution, the raw materials of the encapsulation compound, by weight, include: 100 parts of bisphenol A epoxy resin, 85-95 parts of methyltetrahydrophthalic anhydride, 150-200 parts of crystalline silica powder, 50-100 parts of fused silica powder, 1-2 parts of silane coupling agent, and 0.5-1 parts of defoamer. The preparation process is as follows: fused silica powder is baked at 120℃, and after pretreatment with silane coupling agent, it is added together with bisphenol A epoxy resin and defoamer into a vacuum planetary mixer (-0.08MPa) for thorough wetting and degassing; the temperature is lowered to 40-50℃, preheated methyltetrahydrophthalic anhydride and crystalline silica powder are added, and then vacuum-stirred; the mixture is slowly poured into a 60℃ preheated mold under vacuum, and cured in gradients of 80℃ / 2h, 120℃ / 4h, and 150℃ / 2h. After demolding, there are no cracks or bubbles in the appearance, and the encapsulation compound finally passes all type tests of GB / T 3836.9 to form the encapsulation compound.
[0029] To further optimize the technical solution, the power and communication lines of the motor stator 53 are led out through the grooves in the inner wall of the main explosion-proof housing 52 and welded to the lower cables of the explosion-proof through-wall terminal 81. The upper cables of the explosion-proof through-wall terminal 81 are led out and welded to the drive control board 82. The power and communication lines are introduced into the horn nozzle 9 through cables, locked, and then introduced into the encapsulated explosion-proof cavity 8 and welded to the drive control board 82. When the encapsulation compound is injected into the encapsulation housing 83, the power and communication lines inside the encapsulated explosion-proof cavity 8 and the drive control board 82 are encapsulated into a whole.
[0030] like Figure 6 and Figure 7As shown, the motor stator 53 is the primary heat source during motor operation. The motor stator 53 is pressed into and attached to the inner wall of the main explosion-proof housing 52. Compared to the aluminum alloy material used for the outer shell of ordinary joint motors, the main explosion-proof housing 52 and explosion-proof cover 6 of this invention, according to the coal mine safety standard GB / T3836, must be made of Q235 material. Furthermore, air cooling is prohibited in coal mines, making heat dissipation a challenge for the explosion-proof joint motor. The bottom of the main explosion-proof housing 52 is inlaid with a flat heat-conducting copper tube 41 containing heat-conducting fluid. The bottom surface and adjacent outer cylindrical surface of the main explosion-proof housing 52 are fitted with an integral annular radiator 4 made of copper. The heat from the motor stator 53 is sequentially conducted to the outside through the main explosion-proof housing 52, the flat heat-conducting copper tube 41, and the integral annular radiator 4, thus effectively solving the motor heat dissipation problem.
[0031] This invention fully complies with the requirements for use in Class I coal mine gas environments according to the GB / T3836 standard for coal mine safety. It integrates the reducer, encoder, driver and motor into one unit, resulting in a compact structure, small size and light weight, making it very suitable for driving underground robot dogs in coal mines.
[0032] The above description is merely a preferred embodiment of the present invention and does not constitute any limitation on the technical scope of the present invention. Therefore, any minor modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention shall still fall within the scope of the technical solution of the present invention.
Claims
1. A jointed motor for coal mines, characterized in that, include: The main explosion-proof components are: an output sealing end cap (1), an output explosion-proof cavity (2), an integral annular radiator (4), a motor main explosion-proof cavity (5), an explosion-proof cover (6), and a potted explosion-proof cavity (8). The bottom end of the output explosion-proof cavity (2) is connected to the output sealing end cap (1), and the top end is connected to the motor main explosion-proof cavity (5). The explosion-proof cover (6) is fixedly installed on the top end of the motor main explosion-proof cavity (5), and the potted explosion-proof cavity (8) is fixedly installed on the explosion-proof cover (6). The main explosion-proof components are formed by the output explosion-proof cavity (2), the motor main explosion-proof cavity (5), and the potted explosion-proof cavity (8) in sequence.
2. The explosion-proof and glue-sealed joint motor for coal mines as described in claim 1, characterized in that, The output explosion-proof cavity (2) includes: an output shaft (21), an oil seal (22), four fastening bolts (23), a deep groove ball bearing (24), an explosion-proof copper sleeve (25), a countersunk hexagonal screw (26), and a fastening bolt (3). The explosion-proof copper sleeve (25) is pressed into the housing of the output explosion-proof cavity (2) with an interference fit and is locked and fixed to the output explosion-proof cavity (2) by the countersunk hexagonal screw (26). The flange end face of the output shaft (21) is fixedly installed on the output end face of the planetary reducer (51) by screws. The outer ring of the deep groove ball bearing (24) is clearance-fitted with the housing of the output explosion-proof cavity (2). The inner ring of the deep groove ball bearing (24) is clearance-fitted with the housing of the output explosion-proof cavity (2). With the transition fit of the output shaft (21), the output sealing end cover (1) is locked and fixed to the end face of the output explosion-proof cavity (2) by fastening bolt four (23) and pressing the deep groove ball bearing (24). The oil seal (22) is pressed into the inside of the output sealing end cover (1). The inner ring sealing lip of the oil seal (22) fits against the output shaft (21), and the output explosion-proof cavity (2) is fixed to the motor main explosion-proof cavity (5) by fastening bolt one (3). A cylindrical explosion-proof mating surface is formed between the output explosion-proof cavity (2) and the motor main explosion-proof cavity (5). A cylindrical rotating explosion-proof mating surface is formed between the inner cylindrical surface of the explosion-proof copper sleeve (25) and the outer cylindrical surface of the output shaft (21).
3. The explosion-proof and glue-sealed joint motor for coal mines as described in claim 2, characterized in that, The main explosion-proof cavity (5) of the motor includes: a planetary reducer (51), a main explosion-proof housing (52), a motor stator (53), a motor rotor (54), three fastening bolts (55), and an encoder plate (57). The motor stator (53) is pressed into the main explosion-proof housing (52) with an interference fit. The bottom and inner cylindrical surface of the motor stator (53) are respectively attached to the bottom plane (A) and the outer vertical surface (B) of the main explosion-proof housing (52). The planetary reducer (51) is inserted into the cylindrical surface of the inner center hole (D) of the main explosion-proof housing (52) with a clearance fit and is fixed to the main explosion-proof housing of the motor by screws. At the bottom end face (C) of the housing (52), the encoder plate (57) is installed and fixed on the side of the explosion-proof cover (6) near the explosion-proof cavity. The lower gear shaft of the motor rotor (54) is inserted into the planetary reducer (51). The upper bearing of the motor rotor (54) is inserted into the side of the explosion-proof cover (6) near the explosion-proof cavity. The inner cylindrical surface and outer cylindrical surface of the motor rotor (54) maintain a uniform circumferential gap with the outer cylindrical surface of the motor stator (53) and the inner cylindrical surface of the main explosion-proof housing (52) of the motor, respectively. The explosion-proof cover (6) and the main explosion-proof housing (52) of the motor are connected and fixed by fastening bolt three (55).
4. The explosion-proof and glue-sealed joint motor for coal mines as described in claim 3, characterized in that, The main explosion-proof cavity (5) of the motor also includes a sealing ring (56). The contact surface between the explosion-proof cover (6) and the main explosion-proof shell (52) of the motor is an explosion-proof mating surface. The sealing ring (56) is placed in the sealing groove on the explosion-proof mating surface of the main explosion-proof shell (52) of the motor.
5. The explosion-proof and glue-sealed joint motor for coal mines as described in claim 4, characterized in that, The encapsulated explosion-proof cavity (8) includes: an explosion-proof wall-penetrating terminal block (81), a drive control board (82), an encapsulation shell (83), and a glue injection cap (84). The drive control board (82) is fixed to the top of the explosion-proof cover (6) by screws. The explosion-proof wall-penetrating terminal block (81) is screwed into the explosion-proof cover (6) by threads. The encapsulation shell (83) is fixed to the explosion-proof cover (6) by fastening bolts (7). A cable inlet flare (9) is welded onto the encapsulation shell (83). All edges in contact with the encapsulation shell (83) are sealed with K-704 silicone sealant. Then, the prepared encapsulation compound is poured into the encapsulation shell (83) in one go until it is flush with the upper surface of the encapsulation shell (83). After the encapsulation compound has been allowed to stand and solidify, the glue injection cap (84) is fixed with screws.
6. The explosion-proof and glue-sealed joint motor for coal mines as described in claim 5, characterized in that, The raw materials for the encapsulation compound, by weight, include: 100 parts of bisphenol A epoxy resin, 85-95 parts of methyltetrahydrophthalic anhydride, 150-200 parts of crystalline silica powder, 50-100 parts of fused silica powder, 1-2 parts of silane coupling agent, and 0.5-1 parts of defoamer. The preparation process is as follows: fused silica powder is baked at 120℃, and after pretreatment with silane coupling agent, it is added together with bisphenol A epoxy resin and defoamer into a vacuum planetary mixer for thorough wetting and degassing; the temperature is lowered to 40-50℃, preheated methyltetrahydrophthalic anhydride and crystalline silica powder are added, and then vacuum-stirred; the mixture is slowly poured into a 60℃ preheated mold under vacuum, and cured in gradients of 80℃ / 2h, 120℃ / 4h, and 150℃ / 2h. After demolding, there are no cracks or bubbles in the appearance, and the encapsulation compound finally passes all type tests of GB / T 3836.
9.
7. A jointed motor for coal mines with both explosion-proof and adhesive sealing properties as described in claim 5 or 6, characterized in that, The power and communication lines of the motor stator (53) are led out through the groove in the inner wall of the motor main explosion-proof shell (52) and welded to the lower cable of the explosion-proof through-wall terminal (81). The upper cable of the explosion-proof through-wall terminal (81) is led out and welded to the drive control board (82). The power and communication lines are led out through the cable into the horn mouth (9) and locked, then led into the potted explosion-proof cavity (8) and welded to the drive control board (82).
8. A jointed motor for coal mines with both explosion-proof and adhesive sealing properties as described in claim 7, characterized in that, When the potting compound is injected into the potting shell (83), the power line, communication line and drive control board (82) inside the potting explosion-proof cavity (8) are potted into a whole.
9. A jointed motor for coal mines with both explosion-proof and adhesive sealing properties as described in claim 3, characterized in that, The bottom of the main explosion-proof enclosure (52) of the motor is inlaid with a flat heat-conducting copper tube (41) containing heat-conducting liquid. The bottom surface of the main explosion-proof enclosure (52) of the motor and the adjacent outer cylindrical surface are fitted with an integral annular heat sink (4). The heat of the motor stator (53) is conducted to the outside through the main explosion-proof enclosure (52), the flat heat-conducting copper tube (41), and the integral annular heat sink (4) in sequence.