A water-cooled sealed structure permanent magnetic coupler

Abstract

The present invention discloses a water-cooled, sealed permanent magnet coupler. The permanent magnet coupler includes a housing, an input-side partition plate and an output-side partition plate disposed therein. The housing is separated by the input-side partition plate and the output-side partition plate into an input-side oil chamber, a rotating assembly water chamber, and an output-side oil chamber. An input shaft and an output shaft are axially mounted within the housing, a rotating assembly and a speed regulating assembly are sequentially disposed at the front end of the output shaft. An input-side sealing structure is disposed between the input-side partition plate and the rotating assembly, and an output-side sealing structure is disposed between the rotating assembly and the output-side partition plate. Even after wear and aging of the sealing rings, the present invention prevents oil-water cross-cavity leakage due to the design of the two labyrinth seal structures, thereby extending the service life of each bearing. Lubricating oil loss is also reduced, preventing the lubricating oil from deteriorating due to water ingress, and extending the overhaul period of the permanent magnet coupler.

Description

Technical Field

[0001] The present invention relates to the technical field of water-cooled speed-regulating permanent magnetic couplers, and in particular to a water-cooled sealed structure permanent magnetic coupler. Background Art

[0002] A permanent magnet coupling is a new type of magnetic transmission mechanism that achieves torque transfer between the active and working machines through magnetic field coupling. During operation, there is a speed difference between the copper conductor disc and the permanent magnet disc. The copper conductor disc cuts through the magnetic flux lines of the permanent magnets in the permanent magnet disc, generating a coupled magnetic field. Eddy currents in the magnetic field generate heat. For centrifugal loads such as fans and water pumps, the maximum heat generation rate is 14.8% of the input power. This heat is primarily concentrated in the copper conductor disc, necessitating heat dissipation from the disc. Cooling methods include natural air cooling, water cooling, and oil cooling.

[0003] A permanent magnet coupling is a type of rotating mechanical equipment with bearings installed in the input assembly, speed regulating mechanism, and output assembly. In water-cooled permanent magnet couplings, a seal is required between the cooling water chamber and the lubricating oil chamber to prevent cooling water from entering the bearings and potentially damaging them, and to prevent the bearing's lubricant from leaking outward.

[0004] From input to output, the permanent magnet coupler is axially divided into four parts: the input assembly, the rotating assembly, the speed control mechanism, and the output assembly. The currently commonly used water-cooled sealing structure for permanent magnet couplers uses a partition to separate the interior of the box on the output side. One side contains the rotating assembly, whose copper conductor disk is cooled with water, and the other side contains the speed control mechanism and output assembly, with internal bearings lubricated with oil. Sealing ring contact seals are used between the input assembly and the rotating assembly, and between the rotating assembly and the speed control mechanism. This type of permanent magnet coupler water-cooled sealing structure has the following defects: the sealing ring is made of rubber, which is subject to material wear during use. It is prone to aging in high-temperature environments or long-term water immersion, resulting in a short service life. Without a drawing, the user cannot replace the sealing ring. Replacing some sealing rings requires disassembling the entire machine, or the machine can only be returned to the factory for processing. Summary of the Invention

[0005] The purpose of the present invention is to address the above problems. The present invention solves the oil-water isolation problem of the water-cooled permanent magnet coupler by designing the original sealing form of the sealing ring between the input component and the rotating component, and between the rotating component and the speed regulating mechanism into a combined sealing structure of a labyrinth seal structure plus a sealing ring, thereby extending the service life of the permanent magnet coupler and reducing the failure rate.

[0006] The above-mentioned purpose of the present invention is achieved through the following technical solutions: a water-cooled sealed structure permanent magnet coupler, which includes a box body, in which an input side partition and an output side partition are provided, and the box body is separated by the input side partition and the output side partition into an input side oil chamber, a rotating component water chamber, and an output side oil chamber; an input shaft and an output shaft are axially installed inside the box body, the input shaft is installed on the front end cover of the box body through an input bearing and an input bearing seat, the front end of the output shaft is installed inside the end of the input shaft through a small bearing, and the tail end of the output shaft is installed on the rear end cover of the box body through an output bearing and an output bearing seat, a rotating component and a speed regulating component are sequentially provided at the front end of the output shaft, an input side sealing structure is provided between the input side partition and the rotating component, and an output side sealing structure is provided between the rotating component and the output side partition.

[0007] Furthermore, the input side sealing structure includes an input sealing sleeve, which is arranged on the outside of the input shaft, and has a plurality of first waterproof staggered radial grooves on the outer circumferential surface of the input shaft and the inner circumferential surface of the input sealing sleeve. The plurality of first waterproof staggered radial grooves form an input side labyrinth sealing structure, and a plurality of drainage holes and a drainage pipe are provided in the input sealing sleeve. Each drainage hole is connected to the bottom of the first waterproof staggered radial groove of the input sealing sleeve, and the ends of the plurality of drainage holes are respectively connected to the drainage pipes. The drainage pipe is connected to the water cavity of the rotating component, and the cooling water is thrown out from the drainage hole when the input shaft rotates and returned to the water cavity of the rotating component. A first annular groove is provided on the inner circumferential surface of the front end of the input sealing sleeve, and a first sealing ring is installed in the first annular groove.

[0008] Furthermore, the input side sealing structure also includes a first sealing ring and a second sealing ring installed between the end of the input shaft and the front end of the output shaft. The first sealing ring and the second sealing ring are sequentially sleeved on the outer circumference of the output shaft from the inside to the outside and are located at the rear end of the small bearing. The first sealing ring is fixed to the output shaft through a retaining ring, and the second sealing ring is fixed to the rotating assembly through screws. The first sealing ring and the second sealing ring are provided with a plurality of second waterproof staggered radial tooth grooves, and the plurality of second waterproof staggered radial tooth grooves form an output side labyrinth sealing structure. A second ring groove is provided on the inner circumference of the front end of the second sealing ring, and a second sealing ring is installed in the second ring groove. The second sealing ring The lip faces the small bearing, and an oil inlet channel, multiple oil return channels and multiple channels are axially arranged in the input shaft. An input bearing lubricating oil inlet pipe is installed on the input bearing seat. The input bearing lubricating oil inlet pipe is connected to the oil inlet chamber of the input bearing to transport input bearing lubricating oil to the input bearing. The inlet end of the oil inlet channel is connected to the oil inlet chamber of the input bearing, and the outlet end is connected to the left chamber of the small bearing. The inlet ends of multiple oil return channels are connected to the right chamber of the small bearing, and the outlet ends are connected to the input side oil chamber. The input bearing lubricating oil enters the left chamber of the small bearing from the oil inlet channel, flows through the right chamber of the small bearing, and then flows from the oil return channel to the input side oil chamber.

[0009] A vertically arranged discharge hole is provided in the second sealing ring, the bottom of the discharge hole is connected to the bottom of the second waterproof staggered radial tooth groove of the second sealing ring, the top is connected to the inlet end of the channel, and the outlet end of the channel is connected to the input side oil chamber, so that the cooling water or lubricating oil entering the output side labyrinth sealing structure flows from the discharge hole into the channel and is discharged to the input side oil chamber.

[0010] Furthermore, two O-rings are installed between the first sealing ring and the output shaft, and a water-proof sealing ring is provided at the rear end of the second waterproof staggered radial tooth groove.

[0011] Furthermore, a third annular groove is provided on the inner circumferential surface of the input bearing seat, an input bearing sealing ring is installed in the third annular groove, a pressure cover is fixed at the rear end of the input bearing seat, the input bearing sealing ring is pressed by the pressure cover, and an outwardly protruding retaining ring is provided on the outer circumferential surface of the input shaft, the retaining ring is arranged at the front end of the return oil flow channel outlet, and the retaining ring prevents oil from directly spraying the input bearing sealing ring.

[0012] Furthermore, the speed regulating assembly includes a speed regulating inner sleeve, a speed regulating outer sleeve, a speed regulating inner sleeve bearing and a speed regulating bearing lubricating oil inlet pipe. The speed regulating inner sleeve is sleeved on the outside of the output shaft, and the outer end of the speed regulating inner sleeve is connected to the speed regulating outer sleeve through the speed regulating inner sleeve bearing. The speed regulating outer sleeve is provided with a speed regulating bearing lubricating oil inlet pipe;

[0013] The output side sealing structure includes a support sleeve, a speed regulating bearing, an output end water inlet ring, a speed regulating bearing pressure cover, a support sleeve sealing ring, and a speed regulating bearing sealing ring. The support sleeve is installed on the outside of the speed regulating inner sleeve, and the output end water inlet ring is installed on the outside of the support sleeve. The front end of the support sleeve is connected to the rotating assembly, and the speed regulating bearing is installed on the right end by screws. A speed regulating bearing pressure cover is provided between the output end water inlet ring and the speed regulating bearing;

[0014] A fourth annular groove is provided on the inner circumference of the front end of the support sleeve, a support sleeve sealing ring is installed in the fourth annular groove, and a plurality of radial tooth grooves are provided on the outer circumference of the front end of the speed regulating inner sleeve;

[0015] An annular protrusion is provided on the outer circumferential surface of the support sleeve, and a plurality of oblique tooth grooves are provided on the inward depression of the annular protrusion. A plurality of staggered axial tooth grooves are provided on the end surface of the annular protrusion and the speed regulating bearing pressure cover. The cooling water is thrown into the water cavity of the rotating component by utilizing the centrifugal force during the rotation of the support sleeve. The output end water inlet ring and the speed regulating bearing pressure cover are fixed to the front end surface of the speed regulating sleeve by bolts. The bottom of the speed regulating bearing lubricating oil inlet pipe is connected to the speed regulating bearing oil inlet cavity to deliver the speed regulating bearing lubricating oil to the speed regulating bearing. A speed regulating bearing sealing ring is installed inside the speed regulating bearing pressure cover to prevent the speed regulating bearing lubricating oil from leaking.

[0016] Furthermore, the rotating assembly includes an input side copper disk, an input side permanent magnet disk, an output side permanent magnet disk, and an output side copper disk. The input side copper disk is installed on the input shaft by screws, and the output side copper disk is sleeved on the outer periphery of the speed regulating inner sleeve. The output side copper disk and the support sleeve are fixed by screws, and an inclined surface is provided on the inner periphery of the output side copper disk.

[0017] Furthermore, the upper and lower ends of the input side partition are respectively welded and fixed inside the box body, and the upper and lower ends of the output side partition are respectively welded and fixed inside the box body.

[0018] Compared with the existing technology, the beneficial effects of the present invention are:

[0019] The water-cooled sealing structure permanent magnet coupler of the present invention, the input side sealing structure and the output side sealing structure both adopt a combined seal of a labyrinth sealing structure and a sealing ring. Since the labyrinth sealing structure is a non-contact seal, there is no material wear, the material will not age, there is no service life limit, and the sealing effect will not deteriorate even after a certain service life. In addition, drainage channels are provided at the top of the sealing tooth grooves, and the liquid can be thrown out by centrifugal force. Even after the sealing rings of the present invention are worn and aged, due to the design of the two labyrinth sealing structures, oil and water cross-cavity leakage will not occur, thereby preventing water from entering the input bearing, small bearing and speed regulating bearing, extending the service life of each bearing, and at the same time reducing the loss of lubricating oil, preventing the lubricating oil from entering and deteriorating, and extending the overhaul period of the permanent magnet coupler. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0021] Figure 1 This is a schematic structural diagram of a water-cooled sealed permanent magnetic coupler according to the present invention;

[0022] Figure 2 This is an enlarged structural diagram of the installation location of the input side sealing structure of the present invention;

[0023] Figure 3 It is an enlarged structural diagram of the installation location of the output side sealing structure of the present invention;

[0024] In the figure: 100, housing; 200, input shaft; 2001, oil inlet channel; 2002, oil return channel; 2003, channel; 300, output shaft; 400, input bearing; 500, input bearing seat; 5001, third ring groove; 600, small bearing; 700, output bearing; 800, output bearing seat; 900, speed regulating assembly; 9001, speed regulating inner sleeve; 9002, speed regulating bearing lubricating oil inlet pipe; 9003, speed regulating inner sleeve bearing; 9004, speed regulating outer sleeve;

[0025] 1. Input side partition;

[0026] 2. Input side sealing structure; 201, input sealing sleeve; 2011, drain hole; 2012, drain pipe; 2013, first ring groove; 202, first sealing ring; 203, first sealing ring; 204, second sealing ring; 2041, second ring groove; 2042, drain hole; 205, retaining ring; 206, second sealing ring; 207, input bearing sealing ring; 208, gland; 209, retaining ring; 210, O-ring; 211, first waterproof staggered radial tooth groove; 212, second waterproof staggered radial tooth groove; 213, water-blocking sealing ring;

[0027] 3. Input side oil chamber;

[0028] 4. Rotating assembly; 401. Input side copper disk; 402. Input side permanent magnet disk; 403. Output side permanent magnet disk; 404. Output side copper disk; 4041. Inclined surface;

[0029] 5. Rotating assembly water chamber; 6. Output side partition;

[0030] 7. Output side sealing structure; 701. Support sleeve; 7011. Fourth ring groove; 7012. Annular protrusion; 702. Speed ​​regulating bearing; 703. Output end water inlet ring; 704. Speed ​​regulating bearing gland; 705. Support sleeve seal ring; 706. Speed ​​regulating bearing seal ring; 707. Radial tooth groove; 708. Oblique tooth groove; 709. Staggered axial tooth groove;

[0031] 8. Output side oil chamber; 9. Input bearing lubricating oil inlet pipe; 10. Return pipe. DETAILED DESCRIPTION

[0032] The details of the present invention and its specific implementation methods are further described below with reference to the accompanying drawings and specific embodiments.

[0033] Reference Figure 1-Figure 3, a water-cooled sealed structure permanent magnet coupler, the permanent magnet coupler includes a housing 100, an input side partition 1 and an output side partition 6 are provided in the housing 100, the housing 100 is separated into an input side oil chamber 3, a rotating assembly water chamber 5, and an output side oil chamber 8 by the input side partition 1 and the output side partition 6; an input shaft 200 and an output shaft 300 are axially installed inside the housing 100, the input shaft 200 is installed on the front end cover of the housing 100 through an input bearing 400 and an input bearing seat 500, the front end of the output shaft 300 is installed inside the end of the input shaft 200 through a small bearing 600, and the tail end of the output shaft 300 is installed on the rear end cover of the housing 100 through an output bearing 700 and an output bearing seat 800, a rotating assembly 4 and a speed regulating assembly 900 are sequentially provided at the front end of the output shaft 300, an input side sealing structure 2 is provided between the input side partition 1 and the rotating assembly 4, and an output side sealing structure 7 is provided between the rotating assembly 4 and the output side partition 6.

[0034] The input side sealing structure 2 includes an input sealing sleeve 201, which is arranged on the outside of the input shaft 200. A plurality of first waterproof staggered radial tooth grooves 211 are provided on the outer circumference of the input shaft 200 and the inner circumference of the input sealing sleeve 201. The plurality of first waterproof staggered radial tooth grooves 211 form an input side labyrinth sealing structure, and a plurality of drainage holes 2011 and a drainage pipe 2012 are provided in the input sealing sleeve 201. Each drainage hole 2011 is connected to the input shaft 200. The bottoms of the first waterproof staggered radial tooth grooves 211 of the input sealing sleeve 201 are connected, and the ends of several drainage holes 2011 are respectively connected to the drainage pipes 2012. The drainage pipes 2012 are connected to the water chamber 5 of the rotating component. When the input shaft 200 rotates, the cooling water is thrown out from the drainage holes 2011 and returned to the water chamber 5 of the rotating component. A first annular groove 2013 is provided on the inner circumference of the front end of the input sealing sleeve 201, and a first sealing ring 202 is installed in the first annular groove 2013 as a second sealing measure.

[0035] The input side sealing structure 2 also includes a first sealing ring 203 and a second sealing ring 204 installed between the end of the input shaft 200 and the front end of the output shaft 300. The first sealing ring 203 and the second sealing ring 204 are sequentially sleeved on the outer circumference of the output shaft 300 from the inside to the outside and are located at the rear end of the small bearing 600. The first sealing ring 203 is fixed to the output shaft 300 through a retaining ring 205, and the second sealing ring 204 is fixed to the rotating component 4 through screws. The first sealing ring 203 and the second sealing ring 204 are provided with a plurality of second waterproof staggered radial tooth grooves 212, and the plurality of second waterproof staggered radial tooth grooves 212 form an output side labyrinth sealing structure. A second annular groove 2041 is provided on the inner circumference of the front end of the second sealing ring 204, and a second sealing ring 206 is installed in the second annular groove 2041. The second sealing ring 206 The lip faces the small bearing 600. An oil inlet channel 2001, multiple oil return channels 2002, and multiple channels 2003 are axially provided in the input shaft 200. An input bearing lubricating oil inlet pipe 9 is installed on the input bearing seat 500. The input bearing lubricating oil inlet pipe 9 is connected to the oil inlet chamber of the input bearing 400 to deliver input bearing lubricating oil to the input bearing 400. The inlet end of the oil inlet channel 2001 is connected to the oil inlet chamber of the input bearing 400, and the outlet end is connected to the left chamber of the small bearing 600. The inlet ends of the multiple oil return channels 2002 are connected to the right chamber of the small bearing 600, and the outlet ends are connected to the input side oil chamber 3. The input bearing lubricating oil enters the left chamber of the small bearing 600 from the oil inlet channel 2001, flows through the right chamber of the small bearing 600, and then flows from the oil return channel 2002 to the input side oil chamber 3;

[0036] A vertically arranged discharge hole 2042 is provided in the second sealing ring 204, the bottom of the discharge hole 2042 is connected to the bottom of the second waterproof staggered radial tooth groove 212 of the second sealing ring 204, the top of the discharge hole 2042 is connected to the inlet end of the channel 2003, and the outlet end of the channel 2003 is connected to the input side oil chamber 3, so that the cooling water or lubricating oil entering the output side labyrinth sealing structure flows from the discharge hole 2042 into the channel 2003 and is discharged to the input side oil chamber 3.

[0037] A third annular groove 5001 is provided on the inner circumference of the input bearing seat 500, and an input bearing sealing ring 207 is installed in the third annular groove 5001. A pressure cover 208 is fixed to the rear end of the input bearing seat 500, and the input bearing sealing ring 207 is pressed by the pressure cover 208. An outwardly protruding retaining ring 209 is provided on the outer circumference of the input shaft 200, and the retaining ring 209 is arranged at the front end of the outlet of the return oil flow channel 2002, and the retaining ring 209 prevents oil from directly hitting the input bearing sealing ring 207.

[0038] Two O-rings 210 are installed between the first sealing ring 203 and the output shaft 300, and a water-blocking seal 213 is located at the rear end of the second waterproof staggered radial grooves 212. These water-blocking seals 213 and the two O-rings 210 prevent cooling water from entering the output-side labyrinth seal structure. Even if the second sealing ring 206 and the water-blocking seal 213 are damaged, the second waterproof staggered radial grooves 212 can still isolate the flow of liquid on both sides through a throttling effect (a labyrinth effect).

[0039] In the first waterproof staggered radial tooth groove 211, the gap between the top edge of each protruding tooth of the input shaft 200 and the input sealing sleeve 201 and the bottom edge of the corresponding groove is 1-1.5 mm, and the gap between the two side edges of each protruding tooth and the two inner wall surfaces of the groove is 1-1.5 mm; and the number of protruding teeth is set to 3-6, and the number of grooves matches the number of protruding teeth.

[0040] In the second waterproof staggered radial tooth groove 212, the gap between the top edge of each protruding tooth on the first sealing ring 203 and the second sealing ring 204 and the bottom edge of the corresponding groove is 1-1.5mm, and the gap between the two side edges of each protruding tooth and the two inner wall surfaces of the groove is 1-1.5mm; and the number of protruding teeth is set to 3-6, and the number of grooves matches the number of protruding teeth.

[0041] The speed regulating assembly 900 includes a speed regulating inner sleeve 9001, a speed regulating outer sleeve 9004, a speed regulating inner sleeve bearing 9003, and a speed regulating bearing lubricating oil inlet pipe 9002. The speed regulating inner sleeve 9001 is sleeved on the outside of the output shaft 300. The outer end of the speed regulating inner sleeve 9001 is connected to the speed regulating outer sleeve 9004 via the speed regulating inner sleeve bearing 9003. The speed regulating outer sleeve 9004 is provided with a speed regulating bearing lubricating oil inlet pipe 9002.

[0042] The output side sealing structure 7 includes a support sleeve 701, a speed regulating bearing 702, an output end water inlet ring 703, a speed regulating bearing pressure cover 704, a support sleeve sealing ring 705, and a speed regulating bearing sealing ring 706. The support sleeve 701 is installed on the outside of the speed regulating inner sleeve 9001, and the output end water inlet ring 703 is installed on the outside of the support sleeve 701. The front end of the support sleeve 701 is connected to the rotating assembly, and the speed regulating bearing 702 is installed on the right end by screws. A speed regulating bearing pressure cover 704 is provided between the output end water inlet ring 703 and the speed regulating bearing 702;

[0043] A fourth annular groove 7011 is provided on the inner circumference of the front end of the support sleeve 701 , a support sleeve sealing ring 705 is installed in the fourth annular groove 7011 , and a plurality of radial tooth grooves 707 are provided on the outer circumference of the front end of the speed regulating inner sleeve 9001 .

[0044] An annular protrusion 7012 is provided on the outer circumference of the support sleeve 701, and a plurality of oblique tooth grooves 708 are recessed inward on the outer circumference of the annular protrusion 7012. The number of protruding teeth in the oblique tooth grooves 708 is set to 3-8. The gap between the outer circumference of the annular protrusion 7012 and the output end water inlet ring 703 is 1-1.5 mm. A plurality of staggered axial tooth grooves 709 are provided on the end surface of the annular protrusion 7012 and the speed regulating bearing pressure cover 704. The centrifugal force during the rotation of the support sleeve 701 is used to throw the cooling water into the water cavity 5 of the rotating component. The output end water inlet ring 703 and the speed regulating bearing pressure cover 704 are fixed to the front end surface of the speed regulating sleeve 9004 by bolts. The bottom of the speed regulating bearing lubricating oil inlet pipe 9002 is connected to the oil inlet cavity of the speed regulating bearing 702 to transport the speed regulating bearing lubricating oil to the speed regulating bearing 702. A speed regulating bearing sealing ring 706 is installed inside the speed regulating bearing pressure cover 704 to prevent the speed regulating bearing lubricating oil from leaking.

[0045] The rotating assembly 4 includes an input side copper disk 401, an input side permanent magnet disk 402, an output side permanent magnet disk 403, and an output side copper disk 404. The input side permanent magnet disk 402 is installed at the end of the input side copper disk 401, and the output side permanent magnet disk 403 is installed at the front end of the output side copper disk 404 (existing technical structure). The input side copper disk 401 is installed on the input shaft 200 by screws, and the output side copper disk 404 is sleeved on the outer periphery of the speed regulating inner sleeve 9001. The output side copper disk 404 is fixed to the support sleeve 701 by screws, and an inclined surface 404 is provided on the inner periphery of the output side copper disk 404. 1. To facilitate the throwing out of cooling water, the top edge of each protruding tooth in the plurality of radial tooth grooves 707 is on the same circumferential surface, and the gap between the top edge of the tooth and the inner circumferential surface of the output side copper disk 404 is 1-1.5 mm, forming a labyrinth seal. The function of the output side sealing structure 7 is to isolate the rotating component water chamber 5 and the output side oil chamber 8. Usually, cooling water will splash into or water mist will condense into the radial tooth grooves 707, so a small amount of water will be thrown out. A bevel 4041 is provided on the inner circumferential surface of the output side copper disk 404. Due to centrifugal force, the liquid will be thrown out outward along the bevel 4041, and the support sleeve sealing ring 705 serves as a second line of protection.

[0046] The upper and lower ends of the input side partition 1 are respectively welded and fixed inside the box body 100, and the upper and lower ends of the output side partition 6 are respectively welded and fixed inside the box body 100, which is convenient for disassembly and assembly.

[0047] The input copper disc 401 and the output copper disc 404 of the rotating assembly 4 are cooled by external cooling water. The water flows through the input copper disc 401 and the output copper disc 404 and then falls to the bottom of the housing 100 and flows into the external water tank through the return pipes 10 on both sides. The input bearing 400 is lubricated by the input bearing lubricating oil inlet pipe 9 and falls into the input side oil chamber 3. The speed regulating inner sleeve bearing 9003 is lubricated by the speed regulating bearing lubricating oil inlet pipe 9002 and falls into the output side oil chamber 8. The oil is then pumped out and circulated through the oil suction pipe. The direction of the lubricating oil flow is as follows: Figure 1 、 Figure 2 and Figure 3 The solid arrows in the figure indicate the direction of flow of cooling water, and the hollow arrows indicate the direction of flow of cooling water.

[0048] Both the input-side sealing structure 2 and the output-side sealing structure 7 utilize a labyrinth seal structure plus a sealing ring. Because the labyrinth seal is a non-contact seal, there is no material wear, no material aging, and no service life limit. Even after a certain period of use, the sealing effect will not deteriorate. In addition, a drainage channel is provided at the top of the sealing tooth groove (a plurality of drainage holes 2011 and a drainage pipe 2012 are provided in the input sealing sleeve 201, each drainage hole 2011 is connected to the bottom of the first waterproof staggered radial tooth groove 211 of the input sealing sleeve 201, and the ends of the plurality of drainage holes 2011 are respectively connected to the drainage pipe 2012, and the drainage pipe 2012 is connected to the water chamber 5 of the rotating component, so that the cooling water is thrown out from the drainage hole 2011 when the input shaft 200 rotates and returned to the water chamber 5 of the rotating component; a vertically arranged discharge hole 2042 is provided in the second sealing ring 204, and the bottom of the discharge hole 2042 is connected to the bottom of the second waterproof staggered radial tooth groove 212 of the second sealing ring 204, and the top of the discharge hole 2042 is connected to the entrance of the channel 2003. The two ends are connected, and the outlet end of the channel 2003 is connected to the input side oil chamber 3, so that the cooling water or lubricating oil entering the output side labyrinth sealing structure flows into the channel 2003 from the discharge hole 2042 and is discharged to the input side oil chamber 3; the top edge of each protruding tooth in the several radial tooth grooves 707 is on the same circumferential surface, and the gap between the top edge of the tooth and the inner circumferential surface of the output side copper disk 404 is 1-1.5mm, forming a labyrinth seal. The function of the output side sealing structure 7 is to isolate the rotating component water chamber 5 and the output side oil chamber 8. Usually, cooling water will splash into or water mist will condense into the radial tooth groove 707, so a small amount of water will be thrown out. A slope 4041 is provided on the inner circumferential surface of the output side copper disk 404. Due to centrifugal force, the liquid will be thrown out along the slope 4041), and the centrifugal force can be used to throw the liquid out. Even after the sealing rings of the present invention are worn and aged, oil-water cross-cavity leakage will not occur due to the design of the two labyrinth seal structures, thereby preventing water from entering the input bearing 400, the small bearing 600 and the speed regulating bearing 702, extending the service life of each bearing, and at the same time reducing the loss of lubricating oil, preventing the lubricating oil from entering and deteriorating, and extending the overhaul period of the permanent magnet coupler.

[0049] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A water-cooled sealed structure permanent magnetic coupler, characterized in that: The permanent magnet coupler includes a housing, in which an input side partition and an output side partition are provided. The housing is separated by the input side partition and the output side partition into an input side oil chamber, a rotating assembly water chamber, and an output side oil chamber. An input shaft and an output shaft are axially installed inside the housing. The input shaft is mounted on the front end cover of the housing via an input bearing and an input bearing seat. The front end of the output shaft is mounted inside the end of the input shaft via a small bearing. The tail end of the output shaft is mounted on the rear end cover of the housing via an output bearing and an output bearing seat. A rotating assembly and a speed regulating assembly are sequentially provided at the front end of the output shaft. An input side sealing structure is provided between the input side partition and the rotating assembly, and an output side sealing structure is provided between the rotating assembly and the output side partition. The input side sealing structure includes an input sealing sleeve, which is arranged on the outside of the input shaft. A plurality of first waterproof staggered radial tooth grooves are provided on the outer circumferential surface of the input shaft and the inner circumferential surface of the input sealing sleeve. The plurality of first waterproof staggered radial tooth grooves form an input side labyrinth sealing structure, and a plurality of drainage holes and a drainage pipe are provided in the input sealing sleeve. Each drainage hole is connected to the groove bottom of the first waterproof staggered radial tooth groove of the input sealing sleeve. The ends of the plurality of drainage holes are respectively connected to the drainage pipes. The drainage pipes are connected to the water cavity of the rotating component. When the input shaft rotates, cooling water is thrown out from the drainage holes and returned to the water cavity of the rotating component. A first annular groove is provided on the inner circumferential surface of the front end of the input sealing sleeve, and a first sealing ring is installed in the first annular groove. The input side sealing structure also includes a first sealing ring and a second sealing ring installed between the end of the input shaft and the front end of the output shaft. The first sealing ring and the second sealing ring are sequentially sleeved on the outer circumference of the output shaft from the inside to the outside and are located at the rear end of the small bearing. The first sealing ring is fixed to the output shaft through a retaining ring, and the second sealing ring is fixed to the rotating assembly through screws. The first sealing ring and the second sealing ring are provided with a plurality of second waterproof staggered radial tooth grooves, and the plurality of second waterproof staggered radial tooth grooves form an output side labyrinth sealing structure. A second ring groove is provided on the inner circumference of the front end of the second sealing ring, and a second sealing ring is installed in the second ring groove. The lip of the second sealing ring faces Toward the small bearing, an oil inlet channel, multiple oil return flow channels and multiple channels are axially provided in the input shaft, an input bearing lubricating oil inlet pipe is installed on the input bearing seat, the input bearing lubricating oil inlet pipe is connected with the oil inlet chamber of the input bearing, and the input bearing lubricating oil is delivered to the input bearing, the inlet end of the oil inlet channel is connected with the oil inlet chamber of the input bearing, and the outlet end is connected with the left chamber of the small bearing, the inlet ends of multiple oil return flow channels are connected with the right chamber of the small bearing, and the outlet ends are connected with the input side oil chamber, the input bearing lubricating oil enters the left chamber of the small bearing from the oil inlet channel, flows through the right chamber of the small bearing, and then flows from the oil return flow channel to the input side oil chamber; A vertically arranged discharge hole is provided in the second sealing ring, the bottom of the discharge hole is connected to the bottom of the second waterproof staggered radial tooth groove of the second sealing ring, the top is connected to the inlet end of the channel, and the outlet end of the channel is connected to the input side oil chamber, so that the cooling water or lubricating oil entering the output side labyrinth seal structure flows from the discharge hole into the channel and is discharged to the input side oil chamber; Two O-rings are installed between the first sealing ring and the output shaft, and a water-proof sealing ring is provided at the rear end of the second waterproof staggered radial tooth groove; The speed regulating assembly includes a speed regulating inner sleeve, a speed regulating outer sleeve, a speed regulating inner sleeve bearing and a speed regulating bearing lubricating oil inlet pipe. The speed regulating inner sleeve is sleeved on the outside of the output shaft. The outer end of the speed regulating inner sleeve is connected to the speed regulating outer sleeve through the speed regulating inner sleeve bearing. The speed regulating outer sleeve is provided with a speed regulating bearing lubricating oil inlet pipe. The output side sealing structure includes a support sleeve, a speed regulating bearing, an output end water inlet ring, a speed regulating bearing pressure cover, a support sleeve sealing ring, and a speed regulating bearing sealing ring. The support sleeve is installed on the outside of the speed regulating inner sleeve, and the output end water inlet ring is installed on the outside of the support sleeve. The front end of the support sleeve is connected to the rotating assembly, and the speed regulating bearing is installed on the right end by screws. A speed regulating bearing pressure cover is provided between the output end water inlet ring and the speed regulating bearing; A fourth annular groove is provided on the inner circumference of the front end of the support sleeve, a support sleeve sealing ring is installed in the fourth annular groove, and a plurality of radial tooth grooves are provided on the outer circumference of the front end of the speed regulating inner sleeve; An annular protrusion is provided on the outer circumferential surface of the support sleeve, and a plurality of oblique tooth grooves are provided on the inward depression of the annular protrusion. A plurality of staggered axial tooth grooves are provided on the end surface of the annular protrusion and the speed regulating bearing pressure cover. The cooling water is thrown into the water cavity of the rotating component by utilizing the centrifugal force during the rotation of the support sleeve. The output end water inlet ring and the speed regulating bearing pressure cover are fixed to the front end surface of the speed regulating sleeve by bolts. The bottom of the speed regulating bearing lubricating oil inlet pipe is connected to the speed regulating bearing oil inlet cavity to deliver the speed regulating bearing lubricating oil to the speed regulating bearing. A speed regulating bearing sealing ring is installed inside the speed regulating bearing pressure cover to prevent the speed regulating bearing lubricating oil from leaking.

2. A water-cooled sealed structure permanent magnetic coupler according to claim 1, characterized in that: A third annular groove is provided on the inner circumferential surface of the input bearing seat, and an input bearing sealing ring is installed in the third annular groove. A pressure cover is fixed at the rear end of the input bearing seat, and the input bearing sealing ring is pressed by the pressure cover. An outwardly protruding retaining ring is provided on the outer circumferential surface of the input shaft, and the retaining ring is arranged at the front end of the return oil flow channel outlet to prevent oil from directly spraying on the input bearing sealing ring.

3. The water-cooled sealed permanent magnetic coupler according to claim 1, characterized in that: The rotating assembly includes an input side copper disk, an input side permanent magnet disk, an output side permanent magnet disk, and an output side copper disk. The input side copper disk is installed on the input shaft by screws, and the output side copper disk is sleeved on the outer circumference of the speed regulating inner sleeve. The output side copper disk and the support sleeve are fixed by screws, and an inclined surface is provided on the inner circumference of the output side copper disk.

4. The water-cooled sealed permanent magnetic coupler according to claim 1, characterized in that: The upper and lower ends of the input side partition are respectively welded and fixed inside the box body, and the upper and lower ends of the output side partition are respectively welded and fixed inside the box body.

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