Coal mining machine motor with anti-corrosion seal

Abstract

This application relates to the technical field of motor rust prevention, and in particular to a coal mining machine motor with an anti-rust stop. It includes a load cavity and a motor body, the motor body being disposed inside the load cavity. A motor flange is provided at one end of the motor body. The load cavity has a load stop that mates with the motor flange. The motor flange has a body stop that mates with the load stop. A sealing groove is formed on the surface of the body stop, and a sealing device is provided within the sealing groove. The sealing device is used to seal the gap between the body stop and the load cavity. Compared to existing technologies, this application has stronger sealing protection capabilities, effectively preventing moisture from entering between the motor body and the load cavity, thereby solving the problems of rust prevention and easy disassembly of motors in extremely harsh environments.

Description

Technical Field

[0001] This application relates to the technical field of motor rust prevention, and in particular to a coal mining machine motor with a rust-resistant stop. Background Technology

[0002] As the core equipment in fully mechanized coal mining faces, the stable operation of the coal mining machine's motor directly affects the overall mining efficiency and safety. However, underground coal mining faces have high concentrations of dust, creating an extremely harsh environment. Furthermore, during the mining process, coal seam water seepage and dust suppression measures keep the equipment in a high-humidity environment similar to "rain" for extended periods. Moreover, routine maintenance requires the use of high-pressure water jets to wash the equipment, causing the coal mining machine motor, especially the mounting flange joint connecting it to the main unit, to continuously endure the combined effects of high-pressure water vapor, corrosive media, and intense mechanical vibration.

[0003] Currently, coal mining machine motors are generally positioned by a small-clearance fit between the stop on their flange and the corresponding stop on the main load cavity, and are mainly fastened by bolts. This structure was designed with positioning accuracy and basic static sealing requirements in mind.

[0004] However, in actual underground working conditions, the aforementioned traditional structure reveals serious defects: First, the simple metal stop surface is highly susceptible to corrosion in long-term high-humidity environments, and the small gap allows corrosion products to quickly fill the gap, causing metal adhesion; second, under the strong vibration conditions of coal mining machines, bolt connections alone are prone to loosening, unable to effectively withstand shear forces, affecting transmission accuracy, and the traditional round stop design results in a large contact area, meaning that once the stop corrodes, its bonding force with the main load cavity will far exceed the preload of the bolts; finally, in the confined space underground, the lack of access to large professional disassembly tools leaves maintenance personnel almost helpless against such corroded and jammed motors, rendering conventional set screw hole designs ineffective, often forcing the motor out with jacks or even using cutting machines, with a single replacement taking more than twelve hours, resulting in huge production losses and equipment scrap costs. Therefore, there is an urgent need in this field for a new type of mounting flange stop structure that can fundamentally solve the problems of rust prevention and easy disassembly of motors in extremely harsh environments. Summary of the Invention

[0005] To address the challenges of rust prevention and easy disassembly of motors in extremely harsh environments, this application provides a coal mining machine motor with a rust-resistant stop.

[0006] This application provides a coal mining machine motor with an anti-corrosion stop, which adopts the following technical solution: A coal mining machine motor with an anti-corrosion stop includes a load cavity and a motor body. The motor body is disposed inside the load cavity. One end of the motor body is provided with a motor flange. The load cavity is provided with a load stop that mates with the motor flange. The motor flange is provided with a body stop. The body stop and the load stop are positioned in mate. A sealing groove is formed on the surface of the body stop. A sealing device is provided in the sealing groove. The sealing device is used to seal the gap between the body stop and the load cavity.

[0007] Optionally, the body stop includes a junction box end mounting stop and a non-junction box end mounting stop, and the junction box end mounting stop and the non-junction box end mounting stop respectively cooperate with the corresponding load stop on the load cavity for positioning.

[0008] Optionally, the junction box end mounting stop has a segmented structure, which divides the junction box end mounting stop into multiple independent segments.

[0009] Optionally, the surface of the mounting stop at the junction box end is phosphated to form an insoluble phosphate conversion film.

[0010] Optionally, the sealing device includes a sealing ring disposed in the sealing groove, the sealing ring forming a sealing fit with the load stop.

[0011] Optionally, the end of the load stop is provided with a chamfer structure, which is used to guide the motor flange and the sealing ring into and out of the load cavity.

[0012] Optionally, the sealing device further includes a sealing support ring disposed within the sealing groove, the sealing support ring being used to support the sealing ring.

[0013] Optionally, the motor flange is provided with at least two mounting holes, and mounting bolts are installed in the mounting holes and fixedly connected to the load cavity.

[0014] Optionally, the motor flange is further provided with at least two pin holes, in which pins are installed and connected to the load cavity.

[0015] In summary, this application includes the following beneficial technical effects: This structure directly and effectively seals the critical mating clearance between the motor flange and the load cavity through a sealing device, significantly improving static sealing protection capabilities. It reliably prevents high-pressure water vapor and corrosive media from intruding into the mating interface, fundamentally solving the problem of motor jamming and disassembly difficulties caused by corrosion of the mating surface. The structure employs a segmented design for the mounting stop at the junction box end, dividing the circular stop into multiple independently movable segments. This significantly reduces the metal-to-metal contact area, lowering installation friction and greatly weakening the adhesion caused by corrosion during disassembly. This transforms the extremely difficult motor removal operation into a feasible and effortless process. Simultaneously, the elastic deformation capacity of the segments effectively absorbs internal water pressure stress, preventing long-term deformation of the stop under pressure, significantly improving disassembly feasibility and structural durability. This structure at the junction box end... The mounting surface is phosphated to form an insoluble phosphate conversion film, which, combined with a field-replaceable sealing ring, provides basic chemical protection and maintainable physical sealing. Compared to solutions using only an anti-rust coating, this avoids the need for factory repairs after coating wear, making it particularly suitable for B10 type motors with high reliability requirements, thus improving the reliability and economy of anti-rust measures. This structure, through the interference fit of pins and pin holes, provides precise circumferential positioning and shear resistance for the motor flange, enhancing the reliability of the connecting components under strong vibration conditions, ensuring transmission accuracy, and providing additional stable support for the internal components of the motor. This structure features a chamfered structure at the end of the load-bearing stop, which guides the smooth installation of the protective sealing ring and the motor body, improving installation convenience, sealing reliability, and component lifespan. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the motor flange, motor body, and load cavity in Embodiment 1 of this application; Figure 2 This is a schematic diagram of the structure of the motor body in Embodiment 1 of this application; Figure 3 This is a cross-sectional view of the stop structure in Embodiment 1 of this application; Figure 4 yes Figure 3 A magnified view of a portion of point A in the middle; Figure 5 This is a schematic diagram of the structure of the motor flange in Embodiment 1 of this application; Figure 6 This is a schematic diagram of the structure of the motor body in Embodiment 2 of this application; Figure 7 yes Figure 6 A magnified view of a portion of point B in the middle; Figure 8 This is a cross-sectional structural schematic diagram of the motor flange in Embodiment 2 of this application.

[0017] Reference numerals: 1. Load chamber; 11. Load stop; 2. Motor body; 3. Motor flange; 31. Body stop; 311. Junction box end mounting stop; 312. Non-junction box end mounting stop; 32. Sealing groove; 33. Sealing device; 331. Sealing ring; 332. Sealing support ring; 34. Chamfered structure; 35. Mounting hole; 36. Mounting bolt; 37. Pin hole; 38. Pin; 39. Annular groove; 4. Integrated hydraulic chamber; 41. Energy storage compensation chamber; 42. Pressure balance chamber; 43. Disc spring assembly; 44. Top unloading chamber; 45. Miniature throttling orifice; 5. Hydraulic quick interface; 51. Internal oil passage; 52. Two-way check valve; 6. Composite sealing ring; 61. Anti-extrusion ring; 62. Main sealing lip; 63. Secondary sealing lip; 64. Rigid retaining ring. Detailed Implementation

[0018] The following is in conjunction with the appendix Figure 1-8 This application will be described in further detail. Example 1

[0019] This application discloses a coal mining machine motor with a rust-resistant stop. For example... Figures 1 to 3 As shown, a coal mining machine motor with a rust-proof stop includes a load chamber 1 and a motor body 2. The motor body 2 is located inside the load chamber 1, and a motor flange 3 is installed at one end of the motor body 2. The load chamber 1 is provided with a load stop 11 that mates with the motor flange 3. The motor flange 3 is provided with a body stop 31. The body stop 31 and the load stop 11 work together to achieve precise positioning of the motor and form an initial sealing structure to prevent large particles of impurities from entering the load chamber 1. In addition, the fit gap between the body stop 31 and the load stop 11 is about 1 mm to facilitate the installation of the motor body 2.

[0020] like Figure 4 As shown, a sealing groove 32 is provided on the surface of the machine body stop 31, and a sealing device 33 is provided in the sealing groove 32. The sealing device 33 is used to effectively seal the fitting gap between the machine body stop 31 and the load cavity 1, which significantly enhances the sealing and protection capability. It can effectively prevent high-pressure water vapor and corrosive media from entering the key mating surface between the motor body 2 and the load cavity 1, thereby fundamentally solving the technical problems of motor jamming and disassembly difficulties caused by corrosion.

[0021] As a preferred embodiment, the housing stop 31 further includes a junction box end mounting stop 311 and a non-junction box end mounting stop 312. The junction box end mounting stop 311 and the non-junction box end mounting stop 312 respectively cooperate with the corresponding load stop 11 on the load cavity 1 to achieve bidirectional positioning, thereby improving the stability and centering of the motor installation.

[0022] like Figure 2As shown, the junction box end mounting stop 311 adopts a segmented structure. This segmented structure divides the continuous circular stop into multiple independent segments. Depending on the size of the motor body 2, the number of segments is set to 4-6, thereby avoiding the accumulation of stress on the circular structure and significantly reducing the metal contact area between the motor flange 3 and the load cavity 1. This reduces friction during installation, facilitates initial installation, and greatly reduces the adhesion caused by corrosion when disassembly is required, making the motor pull-out operation feasible and effortless.

[0023] It is worth noting that each independent lobe has a certain radial elastic deformation capacity. When abnormal water pressure is generated inside the load cavity 1 due to external high-pressure water environment or temperature changes, the water pressure will act on the mating surface of the fuselage stop 31. The segmented structure allows each independent lobe to produce a small radial expansion or contraction displacement. This local adaptive deformation can effectively absorb and release the concentrated stress applied to the stop by the internal water pressure, so that the mating surface of the fuselage stop 31 can adapt to the fluctuation of internal pressure. This significantly reduces the risk of permanent plastic deformation or cracking of the stop structure due to long-term exposure to high water pressure, and ensures the fitting accuracy and the reliability of the structure for long-term use.

[0024] To further enhance rust prevention, the surface of the mounting stop 311 at the junction box end is phosphated to form a dense, insoluble phosphate conversion film. This insoluble phosphate conversion film covers the metal surface and can permanently prevent the metal substrate from direct contact with external humid air and corrosive media, providing basic chemical protection and forming a synergistic protective effect with the sealing measures.

[0025] like Figure 3 As shown, the sealing device 33 includes a sealing ring 331 disposed in the sealing groove 32. After installation, the sealing ring 331 is interference-fitted with the surface of the load stop 11 to form a tight physical sealing barrier, thereby dynamically sealing the fit gap between the body stop 31 and the load cavity 1 and preventing fine dust and pressurized water from entering.

[0026] It is worth noting that the sealing ring 331 is made of high-quality elastic material, such as hydrogenated nitrile rubber, which has good wear resistance and corrosion resistance, ensuring long-term stability of sealing performance. In addition, the circular design of the sealing ring 331 makes the installation and replacement of the sealing ring 331 more convenient, improving the efficiency of maintenance and repair.

[0027] The sealing device 33 also includes a sealing support ring 332 disposed in the sealing groove 32. The sealing support ring 332 is located at the root of the sealing ring 331 and provides solid radial support for the sealing ring 331, preventing the sealing ring 331 from being excessively squeezed, deformed, shifted, or failed under long-term high pressure or vibration conditions, thereby extending the service life of the sealing ring 331 and maintaining stable sealing performance.

[0028] To facilitate installation and protect the sealing elements, the end of the load stop 11 is machined with a chamfered structure 34 at a chamfer angle of 45 degrees. This chamfered structure 34 forms an introductory bevel, ensuring a tight fit with the junction box end flange stop, reducing installation errors, enhancing the structural stability of the motor body 2, ensuring the reliability of the motor body 2 during operation, making motor installation more convenient and improving installation efficiency. In addition, when the motor body 2 is installed into the load cavity 1, the chamfered structure 34 can smoothly guide the motor flange 3 and the sealing ring 331 into the correct position, avoiding biting, twisting or cutting damage to the sealing ring 331 at the installation edge, and ensuring the integrity of the seal.

[0029] like Figure 1 and Figure 5 As shown, the motor flange 3 is provided with at least two mounting holes 35, and mounting bolts 36 are installed in the mounting holes 35. The mounting bolts 36 pass through the mounting holes 35 and are connected to the threaded holes on the load cavity 1, thereby fastening the motor flange 3 to the load cavity 1 to provide the main connection rigidity and torsional resistance.

[0030] To further improve connection reliability and resist shear force generated by vibration, at least two pin holes 37 are provided on the motor flange 3. Pins 38 are installed in the pin holes 37. The pins 38 and the corresponding holes on the load cavity 1 are interference fit, which realizes the precise positioning between the motor flange 3 and the load cavity 1, effectively withstands shear stress, prevents the connecting parts from being displaced due to vibration, and ensures transmission accuracy. At the same time, it provides positioning and support for the motor body 2, ensuring the stability and reliability of the internal components of the motor body 2.

[0031] The implementation principle of a coal mining machine motor with a rust-resistant stop in this application embodiment is as follows: The stop structure uses the body stop 31 on the motor flange 3 and the load stop 11 on the load cavity 1 to precisely fit together, achieving the initial positioning of the motor body 2 and forming an initial sealing structure; on this basis, the sealing device 33, composed of the sealing ring 331 and the sealing support ring 332, forms an active physical sealing barrier, directly and effectively sealing the key fitting gaps and preventing high-pressure water vapor and corrosive media from entering the key fitting surfaces between the motor body 2 and the load cavity 1; for the easily corroded junction box end, the stop 311 is installed with a segmented design, dividing the whole into multiple independently micro-moving elastic segments, and phosphating the surface of the segments to generate a chemical conversion film, which not only reduces the friction during installation, but also greatly reduces the adhesion caused by rust when disassembly is required, thereby solving the problem of rust prevention and easy disassembly of the motor in extremely harsh environments. Example 2

[0032] Based on the mechanical seal and protection of Example 1, this embodiment further integrates an innovative hydraulic auxiliary system, aiming to fundamentally solve the industry problem of motors being extremely difficult to disassemble due to corrosion.

[0033] like Figures 6 to 8 As shown, the motor flange 3 has an integrated hydraulic chamber 4 machined inside. The integrated hydraulic chamber 4 includes an annular energy storage compensation chamber 41 and a pressure balance chamber 42, which are interconnected by multiple pipes.

[0034] A hydraulic quick-connect interface 5 is installed on the radial outer wall of the motor flange 3. The hydraulic quick-connect interface 5 is directly connected to the energy storage compensation chamber 41 through the precision-machined internal oil passage 51, thereby providing a channel for injecting hydraulic oil into external hydraulic equipment. The hydraulic quick-connect interface 5 integrates a two-way check valve 52 as an opening and closing element. The two-way check valve 52 works automatically by relying on the spring preload and oil pressure difference inside it.

[0035] An annular groove 39 is machined on the mating end face of the motor flange 3 facing the load cavity 1. The annular groove 39 and the smooth mating surface at the corresponding position on the load cavity 1 together form a closed annular top discharge cavity 44. The pressure balance cavity 42 is connected to the top discharge cavity 44 through multiple micro throttling holes 45.

[0036] When it is necessary to disassemble the motor body 2, the operator connects the external hand pump to the hydraulic quick-connect interface 5 on the motor flange 3 via a high-pressure hose. After the oil supply pressure exceeds the preset opening pressure inside the two-way check valve 52, the valve core opens, and hydraulic oil flows sequentially into the energy storage compensation chamber 41, the pressure balance chamber 42, and the top unloading chamber 44 through the internal oil passage 51. As the oil is continuously injected, the pressure in the top unloading chamber 44 gradually increases. Since the load chamber 1 is a fixed component, the oil pressure acts simultaneously on the mating surfaces of the top unloading chamber 44 and the load chamber 1, thereby forming a significant pressure difference, which in turn generates a huge and uniform axial thrust. This thrust acts directly on the motor flange 3, which can smoothly and controllably overcome the adhesion force caused by corrosion on the mating surface of the load stop 11, allowing the motor body 2 to be pushed out a distance of several millimeters. This process fundamentally replaces the destructive methods of traditional operations that rely on violent pulling or even cutting, achieving a safe, labor-saving, and efficient disassembly process.

[0037] After the disassembly operation is completed, the external hand pump is disconnected. The two-way check valve 52 automatically closes under the action of the system residual pressure and the built-in spring force, reliably sealing the hydraulic oil in the integrated hydraulic chamber 4. This achieves the system's self-sealing and standby sealing integrity, providing convenience for the next operation and reducing repeated preparation time.

[0038] It is worth noting that in the specific environment of extremely confined space in underground coal mine working faces where large hydraulic equipment is difficult to access, the use of an external hand-cranked pump as a hydraulic power source in this application has significant advantages: the hand-cranked pump is small in size and light in weight, making it easy for maintenance personnel to carry to the work site without relying on electricity or large hydraulic stations, and is especially suitable for flexible operation in narrow and obstacle-ridden underground working conditions; its pure mechanical transmission method not only avoids the safety hazards that electrical equipment may cause in a gas environment, but also reduces the dependence on on-site infrastructure, is simple to operate, and has high reliability, effectively solving the operational difficulties caused by the inability to use large jacking equipment due to space limitations in traditional dismantling methods, thus achieving rapid and efficient dismantling of corroded motors in harsh underground environments while ensuring safety.

[0039] In addition, since the pressure balance chamber 42 is connected to the top discharge chamber 44 through the micro throttling orifice 45, when external hydraulic oil is injected into the system and flows to the top discharge chamber 44, the oil must first pass through the micro throttling orifice 45. Due to the small diameter of the micro throttling orifice 45, it has a significant throttling and damping effect on the flow of the oil, forcing the oil flow rate to decrease and enter the top discharge chamber 44 in a stable and controllable manner. This process can effectively suppress the instantaneous surge or violent fluctuation of hydraulic oil pressure, and convert the possible pressure shock energy into a stable pressure build-up process, thereby achieving dynamic balance and buffering of the internal pressure of the system.

[0040] The damping and buffering effect of the micro throttling orifice 45 ensures that the pressure in the unloading chamber 44 can rise smoothly and linearly during the lifting operation of disassembling the motor body 2, completely avoiding hydraulic shock caused by sudden pressure rise, thereby avoiding damage to sealing elements and mating structures, and greatly improving the stability and controllability of the lifting process; at the same time, through the above-mentioned pressure balance, it also ensures that the system can maintain a stable sealing state during standby, significantly improving the reliability and safety of the entire hydraulic assisted disassembly system and effectively extending the service life of key components.

[0041] A set of disc springs 43 is pre-tightly installed in the energy storage compensation chamber 41. The disc springs 43 are pre-compressed and store elastic potential energy in the energy storage compensation chamber 41. This potential energy will continuously apply a stable base pressure to the hydraulic oil in the system. When the external temperature changes and the volume of the hydraulic oil expands and contracts due to heat, the disc springs 43 can automatically compensate for this volume change through its own expansion and contraction, absorbing the excess space generated by the expansion of the oil or making up for the gap generated by the contraction, thereby maintaining the dynamic balance and stability of the internal pressure of the hydraulic system.

[0042] The disc spring assembly 43 provides continuous elastic compensation force, ensuring that the hydraulic system can adaptively maintain a reliable and stable internal pressure environment when it is idle for a long time or when facing complex downhole temperature conditions. This not only effectively prevents the risk of pressure loss or seal failure caused by changes in oil volume, but also significantly improves the integrity of the system seal and standby reliability. Furthermore, it fundamentally enhances the responsiveness and operational stability of the hydraulic assisted disassembly function, thereby ensuring the safety and efficiency of motor disassembly operations and greatly reducing maintenance needs and equipment downtime risks caused by system pressure fluctuations.

[0043] It is worth noting that the top unloading chamber 44, the energy storage compensation chamber 41, and the pressure balance chamber 42 work together to form a hydraulic control system: During disassembly, external hydraulic oil is injected through the energy storage compensation chamber 41. The disc spring assembly 43 built into the energy storage compensation chamber 41 not only provides initial back pressure to maintain system pressure stability, but also compensates for volume fluctuations in hydraulic oil caused by temperature changes in real time. The hydraulic oil then enters the pressure balance chamber 42, and the flow is buffered by the damping effect of the micro throttling orifice 45 to suppress pressure shocks, ensuring that the hydraulic oil enters the top unloading chamber 44 smoothly. Under the continuous action of oil pressure, the top unloading chamber 44 generates a uniform axial thrust, thereby pushing the motor flange 3 away from the corroded interface. The elastic energy storage of the energy storage compensation chamber 41 and the throttling buffer of the pressure balance chamber 42 together ensure the smoothness and controllability of the pushing process, avoid hydraulic shocks from damaging the seals and structure, and maintain the integrity of the system seal during non-working periods, significantly improving the reliability, safety, and environmental adaptability of hydraulic disassembly.

[0044] A composite sealing ring 6 is embedded in the annular groove 39. The composite sealing ring 6 is used to dynamically seal the top unloading cavity 44. The composite sealing ring 6 includes a rigid anti-extrusion ring 61 installed at the bottom of the annular groove 39, and a main sealing lip 62 and a secondary sealing lip 63 integrally formed on the anti-extrusion ring 61. The main sealing lip 62 and the secondary sealing lip 63 are both made of oil-resistant rubber and are arranged in annular shape. The main sealing lip 62 is bent toward the inside of the motor body 2, and the secondary sealing lip 63 is bent toward the outside of the load cavity 1.

[0045] In the initial installation state of the main sealing lip 62 and the secondary sealing lip 63, the main sealing lip 62 and the secondary sealing lip 63 bend towards the inside of the motor body 2 and the outside of the load cavity 1 respectively by their own elasticity, and are tightly attached to the mating surface of the load cavity 1 in an interference fit manner, forming a basic bidirectional static sealing barrier, effectively preventing external dust, water vapor and other media from entering the load cavity 1, and making the main and secondary sealing lips 63 and the load cavity 1 temporarily form a closed oil containing space.

[0046] When external hydraulic oil is pumped into the system through the hydraulic quick interface 5 and finally enters the top unloading chamber 44, the hydraulic oil will also enter the narrow space between the main sealing lip 62 and the secondary sealing lip 63 of the composite sealing ring 6. The hydraulic oil will create pressure inside the main sealing lip 62 and the secondary sealing lip 63, causing the main sealing lip 62 and the secondary sealing lip 63 to expand radially. This will cause the main sealing lip 62 and the secondary sealing lip 63 to further press against the mating surface of the load cavity 1, strengthening the tightness of the fit between the two and the mating surface of the load cavity 1. That is, the higher the pressure, the tighter the seal, thereby enhancing the overall sealing stability.

[0047] When the motor is running, if external liquid or pressure seeps into the sealing interface due to pressure fluctuations or temperature changes in the downhole environment, the main sealing lip 62 and the secondary sealing lip 63 work together to seal, which not only effectively adapts to vibration and pressure fluctuation conditions, but also provides active sealing protection during motor stationary or running periods, significantly improving the sealing reliability and service life of the system in harsh environments.

[0048] It is worth noting that during the process of pushing the motor flange 3, even if the motor body 2 begins to move and disengages from the load cavity 1 by a small initial distance, the main sealing lip 62 and the secondary sealing lip 63, due to their continuous radial elasticity and following properties, will always maintain a tight contact with the mating surface of the load cavity 1. This allows the sealing chamber formed by the main sealing lip 62, the secondary sealing lip 63, and the mating surface of the load cavity 1 to be temporarily kept closed. The hydraulic oil will be continuously sealed in this chamber, and its pressure will be maintained and continue to act on the motor flange 3. This provides a continuous and stable axial pushing force to the motor flange 3, enabling it to move a longer distance. This ensures that the pushing force will not rapidly depressurize and fail due to the instantaneous separation of the mating surfaces, thus ensuring the continuity of the pushing force and the extension of the effective distance. By significantly increasing the effective stroke of hydraulically assisted disassembly, the motor flange 3 can be pushed out a longer distance, completely disrupting the continuity of the rust and adhesion. This creates extremely favorable conditions for subsequent final disassembly using conventional mechanical tools. It not only greatly reduces the difficulty and physical strength required for disassembly operations, but more importantly, it significantly shortens critical downtime for maintenance. It also fundamentally avoids the risk of disassembly failure or the need for repeated operations due to insufficient pushing stroke, improving the success rate and overall efficiency of disassembly operations. At the same time, by maintaining a stable release of oil pressure, it also protects the hydraulic system components and sealing structures themselves from impact damage.

[0049] Rigid retaining rings 64 are fixed on both sides of the anti-compression ring 61. The main sealing lip 62 and the secondary sealing lip 63 are located between the two rigid retaining rings 64. During the hydraulic jacking process, the rigid retaining rings 64 directly abut against the mating surface of the load cavity 1, and work together with the main sealing lip 62 and the secondary sealing lip 63 to bear pressure, thereby enhancing the overall rigidity of the sealing interface and effectively preventing the sealing structure from being squeezed, deformed, or shifting under high pressure. In addition, the rigid retaining rings 64 precisely constrain the radial expansion of the main sealing lip 62 and the secondary sealing lip 63, limiting their maximum deformation and preventing the sealing from failing due to excessive rolling or tearing of the main sealing lip 62 and the secondary sealing lip 63 during the displacement of the motor. This ensures that the closed oil cavity formed between the main sealing lip 62 and the secondary sealing lip 63 maintains structural integrity and pressure stability during the jacking process, allowing the hydraulic oil to continuously act on the motor flange 3, ensuring the continuity and sufficiency of the jacking force transmission, and significantly improving the reliability and operational safety of hydraulic disassembly.

[0050] The implementation principle of a coal mining machine motor with an anti-corrosion stop in this application embodiment is as follows: When the motor needs to be disassembled, oil is supplied to the hydraulic quick interface 5 through an external hand pump. The hydraulic oil flows sequentially through the energy storage compensation chamber 41 and the pressure balance chamber 42, and finally smoothly enters the top discharge chamber 44 through the micro throttle orifice 45. The disc spring assembly 43 in the energy storage compensation chamber 41 not only provides initial back pressure and maintains system pressure stability, but also compensates for volume fluctuations in the oil caused by temperature changes in real time. The pressure balance chamber 42 and the micro throttle orifice 45 work together to suppress pressure shocks, ensuring that the oil smoothly enters the top discharge chamber 44. The pressure in the top discharge chamber 44 continuously rises. The hydraulic pressure acts on the end face of the motor flange 3, forming a huge and uniform axial thrust, which directly overcomes the corrosion adhesion force and allows the motor body 2 to be smoothly pushed out. At the same time, under the action of hydraulic pressure, the composite sealing ring 6 causes the main sealing lip 62 and the secondary sealing lip 63 to expand radially, forming a dynamic sealing effect of "the higher the pressure, the tighter the seal". Even after the motor body 2 starts to move, the main sealing lip 62 and the secondary sealing lip 63 can still maintain the closure and pressure stability of the unloading cavity 44, ensuring the continuity of the thrust and the extension of the action distance, so that the motor flange 3 can be pushed out a longer distance, completely destroying the continuity of the corrosion adhesion.

[0051] This embodiment transforms the traditional disassembly method, which relies on violent pulling and cutting, into a controllable, stable, and safe hydraulic jacking operation. This not only greatly reduces the difficulty of operation and physical exertion, and significantly shortens downtime for maintenance, but also fundamentally solves the industry problems of large equipment being unusable in narrow underground spaces and the difficulty of disassembling corroded motors. At the same time, through the system's self-sealing and pressure self-adaptation, the reliability and durability of hydraulic components and sealing structures are ensured under long-term standby and harsh working conditions.

[0052] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A coal mining machine motor with a rust-resistant stop, comprising a load cavity and a motor body, wherein the motor body is disposed inside the load cavity, a motor flange is provided at one end of the motor body, and the load cavity is provided with a load stop that mates with the motor flange, characterized in that, The motor flange is provided with a body stop, which is positioned in conjunction with the load stop. A sealing groove is provided on the surface of the body stop, and a sealing device is provided in the sealing groove. The sealing device is used to seal the gap between the body stop and the load cavity.

2. A coal mining machine motor with a rust-resistant stop as described in claim 1, characterized in that, The body stop includes a junction box end mounting stop and a non-junction box end mounting stop, and the junction box end mounting stop and the non-junction box end mounting stop respectively cooperate with the corresponding load stop on the load cavity for positioning.

3. A coal mining machine motor with an anti-corrosion stop as described in claim 2, characterized in that, The junction box end mounting stop has a segmented structure, which divides the junction box end mounting stop into multiple independent segments.

4. A coal mining machine motor with an anti-corrosion stop as described in claim 3, characterized in that, The surface of the mounting stop at the junction box end is phosphated to form an insoluble phosphate conversion film.

5. A coal mining machine motor with a rust-resistant stop as described in claim 1, characterized in that, The sealing device includes a sealing ring disposed in the sealing groove, and the sealing ring forms a sealing fit with the load stop.

6. A coal mining machine motor with an anti-corrosion stop as described in claim 5, characterized in that, The end of the load stop is provided with a chamfer structure, which is used to guide the motor flange and the sealing ring into and out of the load cavity.

7. A coal mining machine motor with an anti-corrosion stop as described in claim 5, characterized in that, The sealing device further includes a sealing support ring disposed within the sealing groove, the sealing support ring being used to support the sealing ring.

8. A coal mining machine motor with an anti-corrosion stop as described in claim 1, characterized in that, The motor flange is provided with at least two mounting holes, and mounting bolts are installed in the mounting holes and are fixedly connected to the load cavity.

9. A coal mining machine motor with an anti-corrosion stop as described in claim 8, characterized in that, The motor flange is also provided with at least two pin holes, in which pins are installed and connected to the load cavity.

Images