Rotary oil supply device

Abstract

The invention discloses a rotary oil supply device, and relates to an oil supply device. The invention aims to solve the problem that an existing rotating joint cannot continuously meet the oil supply function under the condition that the rotating speed of a rotating shaft of equipment is higher and higher. The rotary sealing sleeve is arranged between the oil supply shaft and the rotary sealing seat, and the sealing rings are mounted on the outer circumferential surface of the rotary sealing sleeve and the outer circumferential surface of the oil supply shaft, so that the oil supply shaft is not in direct contact with the rotary sealing seat, and the oil supply shaft is not in direct contact with the rotary sealing seat under the condition that allowable [P] and [V] of the existing sealing rings are not changed. The friction heating power generated by the sealing rings on the rotary sealing sleeve and the oil supply shaft does not exceed the allowable value of the sealing rings, the high rotating speed requirement of the equipment rotating shaft can be continuously met under the condition that sealing and oil supply are guaranteed, and the rotating speed working range of the equipment rotating shaft is expanded. The invention belongs to the technical field of rotary oil supply.

Description

Technical Field

[0001] The invention relates to an oil supply device, in particular to a rotary oil supply device, and belongs to the technical field of rotary oil supply. Background Art

[0002] When the shaft rotates at high speed, the mechanical parts installed on it (such as friction clutch, slip clutch or liquid viscous clutch, etc.) need the assistance of lubricating oil and working oil of a certain pressure and flow rate to work normally.

[0003] At present, most of them use multi-channel rotary joints with rotary sealing structures (such as Figure 1 The rotary joint of Deublin Company of the United States shown in the figure delivers low-pressure lubricating oil with pressure P1 and high-pressure working oil with pressure P2 to the equipment shaft.

[0004] When the rotary joint is working, the speed of its stator is 0, the rotor is coaxially fixed with the equipment shaft and rotates together at a speed of n1, so the speed of the rotor relative to the stator is also n1, and the lubricating oil and working oil are respectively supplied to the equipment shaft through the low-pressure oil inlet and high-pressure oil inlet on the stator. The low-pressure oil inlet and the high-pressure oil inlet are separated by a sealing ring mounted on the rotor.

[0005] However, as the performance of the equipment continues to improve, the speed of the equipment shaft is getting higher and higher, and the requirements for the rotary seal structure are also more stringent. According to the friction heat power formula of the rotary seal surface:

[0006]

[0007] Where:

[0008] P2 is the oil pressure of the high-pressure working oil required by the equipment shaft;

[0009] n1 is the rotation speed of the equipment shaft;

[0010] π is the ratio of a circle to a circle;

[0011] V1 is the linear velocity of the outer circumference of the seal under actual working conditions;

[0012] [P] is the allowable pressure of the seal;

[0013] [V] is the allowable linear speed of the seal.

[0014] When P2 remains unchanged, the speed n1 increases, and the frictional heat power will exceed the allowable value of the seal, which will cause the rotating seal structure to burn, rupture, or even seal failure, making it impossible to achieve the oil supply function.

[0015] In summary, how to improve the existing rotary sealing structure in view of the above technical problems and then propose a new rotary oil supply device has become an urgent problem to be solved by technicians in this field. Summary of the invention

[0016] The present invention aims at solving the above-mentioned deficiencies of the prior art and provides a rotary oil supply device.

[0017] The technical solution of the present invention is: a rotary oil supply device, comprising an oil supply shaft, a sealing flange, a rotary sealing sleeve, a rotary sealing seat, a braking impeller, a sealing cover and a hydraulic drive unit.

[0018] One end of the oil supply shaft is coaxially fixed with the equipment shaft, the equipment shaft is rotatably connected with the equipment box, a first axial oil inlet hole and a second axial oil inlet hole are opened on the end surface of the equipment shaft, and an oil return hole is opened on the equipment box.

[0019] A second axial oil outlet hole and a third axial oil outlet hole are provided on the end face of the oil supply shaft, an inner working oil ring groove and a fourth radial oil inlet hole are provided on the outer circumferential surface of the oil supply shaft, inner rotating sealing rings are installed on both sides of the inner working oil ring groove, the inner working oil ring groove is connected with the second axial oil outlet hole through the fourth radial oil inlet hole, and the second axial oil outlet hole is connected with the second axial oil inlet hole.

[0020] The sealing flange is coaxially installed on the oil supply shaft, the rotary sealing sleeve is coaxially sleeved on the oil supply shaft, one end of the rotary sealing sleeve is coaxially inserted in the sealing flange, and the other end of the rotary sealing sleeve is coaxially inserted in the rotary sealing seat.

[0021] The sealing cover is installed on the equipment box body, and one end of the rotary sealing seat is inserted in the sealing cover, and the other end of the rotary sealing seat is installed with a tail cover, which is rotatably connected to the other end of the oil supply shaft.

[0022] The hydraulic drive unit includes a driving impeller, a driven impeller housing and a brake impeller.

[0023] The driven impeller casing comprises a left impeller casing, a driving torque adjustment pad and a right impeller casing which are coaxially fixed in sequence. The left impeller casing is coaxially fixed to the end face of the rotating sealing sleeve.

[0024] The active impeller is arranged in the cavity of the driven impeller housing, and the active impeller is coaxially mounted on the oil supply shaft.

[0025] The brake impeller is arranged between the tail cover and the right impeller housing, and the brake impeller is coaxially mounted on the tail cover, and a brake adjustment gasket is sandwiched between the brake impeller and the tail cover.

[0026] The two end surfaces of the rotary sealing sleeve are respectively provided with a first axial oil outlet hole and an axial oil supply hole which are not connected to each other. The first axial oil outlet hole is connected to the first axial oil inlet hole through a third axial oil outlet hole.

[0027] An outer lubricating oil ring groove, an outer working oil ring groove, a first radial oil inlet hole, a second radial oil inlet hole and a third radial oil inlet hole are formed on the outer circumferential surface of the rotary sealing sleeve.

[0028] External rotating sealing rings are installed on both sides of the external lubricating oil ring groove, and external rotating sealing rings are installed on both sides of the external working oil ring groove.

[0029] The outer working oil ring groove is connected to the inner working oil ring groove through the first radial oil inlet hole, the outer lubricating oil ring groove is connected to the first axial oil outlet hole through the second radial oil inlet hole, the outer lubricating oil ring groove is connected to the axial oil supply hole through the third radial oil inlet hole, and the axial oil supply hole is connected to the driven impeller cover.

[0030] A high-pressure radial oil inlet, a low-pressure radial oil inlet and an oil drain hole are provided on the rotary seal seat; the high-pressure radial oil inlet is connected to the outer working oil ring groove, the low-pressure radial oil inlet is connected to the outer lubricating oil ring groove, and the driven impeller cover and the oil return hole are both connected to the oil drain hole.

[0031] Compared with the prior art, the present invention has the following effects:

[0032] The present invention provides a rotary sealing sleeve 500 between the oil supply shaft 300 and the rotary sealing seat 600, and installs sealing rings on the outer circumferential surfaces of the rotary sealing sleeve 500 and the outer circumferential surfaces of the oil supply shaft 300, so that the oil supply shaft 300 and the rotary sealing seat 600 are not in direct contact, the sealing ring on the oil supply shaft 300 rotates at a linear velocity V1 relative to the rotary sealing sleeve 500, and the sealing ring on the rotary sealing sleeve 500 rotates at a linear velocity V2 relative to the rotary sealing seat 600. Without changing the allowable [P] and [V] of the existing sealing ring, the frictional heat generation power generated by the rotary sealing sleeve 500 and the sealing ring on the oil supply shaft 300 does not exceed the allowable value of the sealing ring. Under the condition of ensuring sealing and oil supply, the high speed requirement of the equipment shaft 20 can continue to be met, thereby expanding the speed working range of the equipment shaft 20. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a structural schematic diagram of a multi-channel rotary joint in the prior art, in which:

[0034] "P1 in" indicates low-pressure lubricating oil input, "P1 out" indicates low-pressure lubricating oil output,

[0035] "P2 in" indicates high-pressure lubricating oil input, and "P2 out" indicates high-pressure lubricating oil output;

[0036] Figure 2 It is a structural schematic diagram of the present invention, in which:

[0037] "P1 in" indicates low-pressure lubricating oil input, "P1 out" indicates low-pressure lubricating oil output,

[0038] "P2 in" indicates high-pressure lubricating oil input, and "P2 out" indicates high-pressure lubricating oil output;

[0039] Figure 3 is a schematic structural diagram of a sealing housing 1300 of the present invention;

[0040] Figure 4 It is a structural schematic diagram of the oil supply shaft 300 of the present invention;

[0041] Figure 5 It is a structural schematic diagram of the assembly of the oil supply shaft 300 and the rotary sealing sleeve 500 of the present invention;

[0042] Figure 6 yes Figure 5 A partial enlarged view of point Ⅰ in the middle;

[0043] Figure 7 700 is a schematic structural diagram of a driven impeller housing 700 of the present invention;

[0044] Figure 8 Schematic diagram of the flow of low-pressure lubricating oil and high-pressure working oil when the present invention is working, in which:

[0045] "P1 in" indicates low-pressure lubricating oil input, "P1 out" indicates low-pressure lubricating oil output,

[0046] “P2 in” indicates high-pressure lubricating oil input, and “P2 out” indicates high-pressure lubricating oil output.

[0047] In the figure: 20, equipment shaft; 21, first axial oil inlet hole; 22, second axial oil inlet hole; 40, equipment housing; 41, oil return hole; 300, oil supply shaft; 310, active impeller; 340, inner working oil ring groove; 360, inner rotating seal ring; 380, second axial oil outlet hole; 400, sealing flange; 500, rotating seal sleeve; 520, outer lubricating oil ring groove; 540, outer working oil ring groove; 541, first radial oil inlet hole; 542, second radial oil inlet hole; 560, outer rotating seal ring; 580, first axial oil outlet hole; 590, throttle plug; 594, axial oil supply hole; 600, rotary seal seat; 610, high-pressure radial oil inlet; 620, low-pressure radial oil inlet; 640, oil drain hole; 700, driven impeller cover; 710, left impeller housing; 720, drive torque adjustment pad; 730, right impeller housing; 800, brake impeller; 820, brake adjustment pad; 900, tail cover; 1000, rolling bearing; 1100, stepped sealing cover; 1110, housing sealing ring; 1120, sealing cover; 1200, speed sensor; 1300, sealing cover; 1400, hydraulic drive unit. DETAILED DESCRIPTION

[0048] In order to make the purpose, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0049] Specific implementation method 1: Combination Figures 2 to 8 To explain this embodiment, a rotary oil supply device of this embodiment includes an oil supply shaft 300 , a sealing flange 400 , a rotary sealing sleeve 500 , a rotary sealing seat 600 , a brake impeller 800 , a sealing housing 1300 and a hydraulic drive unit 1400 .

[0050] One end of the oil supply shaft 300 is coaxially fixed to the equipment shaft 20 , and the equipment shaft 20 is rotatably connected to the equipment housing 40 . A first axial oil inlet hole 21 and a second axial oil inlet hole 22 are formed on the end surface of the equipment shaft 20 , and an oil return hole 41 is formed on the equipment housing 40 .

[0051] A second axial oil outlet hole 380 and a third axial oil outlet hole 390 are formed on the end surface of the oil supply shaft 300, and an inner working oil ring groove 340 and a fourth radial oil inlet hole are formed on the outer circumferential surface of the oil supply shaft 300. Inner rotating sealing rings 360 are installed on both sides of the inner working oil ring groove 340. The inner working oil ring groove 340 is connected to the second axial oil outlet hole 380 through the fourth radial oil inlet hole, and the second axial oil outlet hole 380 is connected to the second axial oil inlet hole 22.

[0052] The sealing flange 400 is coaxially mounted on the oil supply shaft 300 , the rotary sealing sleeve 500 is coaxially sleeved on the oil supply shaft 300 , one end of the rotary sealing sleeve 500 is coaxially inserted into the sealing flange 400 , and the other end of the rotary sealing sleeve 500 is coaxially inserted into the rotary sealing seat 600 .

[0053] The sealing housing 1300 is installed on the equipment housing 40 , and one end of the rotary sealing seat 600 is inserted into the sealing housing 1300 . The other end of the rotary sealing seat 600 is installed with a tail cover 900 , which is rotatably connected to the other end of the oil supply shaft 300 .

[0054] The hydraulic drive unit 1400 includes a driving impeller 310 , a driven impeller casing 700 , and a braking impeller 800 .

[0055] The driven impeller casing 700 includes a left impeller housing 710 , a driving torque adjustment pad 720 , and a right impeller housing 730 , which are coaxially fixed in sequence. The left impeller housing 710 is coaxially fixed to the end surface of the rotating sealing sleeve 500 .

[0056] The driving impeller 310 is arranged in the cavity of the driven impeller housing 700 , and the driving impeller 310 is coaxially mounted on the oil supply shaft 300 .

[0057] The brake impeller 800 is arranged between the tail cover 900 and the right impeller housing 730 , and the brake impeller 800 is coaxially mounted on the tail cover 900 , and a brake adjustment gasket 820 is sandwiched between the brake impeller 800 and the tail cover 900 .

[0058] The two end surfaces of the rotary sealing sleeve 500 are respectively provided with a first axial oil outlet hole 580 and an axial oil supply hole 594 which are not connected to each other. The first axial oil outlet hole 580 is connected to the first axial oil inlet hole 21 through the third axial oil outlet hole 390 .

[0059] An outer circumferential surface of the rotary sealing sleeve 500 is provided with an outer lubricating oil ring groove 520 , an outer working oil ring groove 540 , a first radial oil inlet hole 541 , a second radial oil inlet hole 542 and a third radial oil inlet hole 543 .

[0060] External rotating seal rings 560 are installed on both sides of the outer lubricating oil ring groove 520 , and external rotating seal rings 560 are installed on both sides of the outer working oil ring groove 540 .

[0061] The outer working oil ring groove 540 is connected to the inner working oil ring groove 340 through the first radial oil inlet hole 541, the outer lubricating oil ring groove 520 is connected to the first axial oil outlet hole 580 through the second radial oil inlet hole 542, the outer lubricating oil ring groove 520 is connected to the axial oil supply hole 594 through the third radial oil inlet hole 543, and the axial oil supply hole 594 is connected to the driven impeller cover 700.

[0062] The rotary seal seat 600 is provided with a high-pressure radial oil inlet 610, a low-pressure radial oil inlet 620 and an oil drain hole 640; the high-pressure radial oil inlet 610 is connected to the outer working oil ring groove 540, the low-pressure radial oil inlet 620 is connected to the outer lubricating oil ring groove 520, and the driven impeller cover 700 and the oil return hole 41 are both connected to the oil drain hole 640.

[0063] Specific implementation method 2: Combination Figure 2 and Figure 3 To illustrate this embodiment, the sealing housing 1300 in this embodiment includes a coaxially arranged stepped sealing housing 1100 , a housing sealing ring 1110 , and a sealing gland 1120 .

[0064] One end of the stepped sealing cover 1100 is installed on the equipment box 40 by screws, and the sealing cover 1120 is installed on the other end of the stepped sealing cover 1100 by screws. The shell sealing ring 1110 is arranged between the stepped sealing cover 1100 and the sealing cover 1120, and the rotating sealing seat 600 is inserted into the shell sealing ring 1110.

[0065] Other components and connection relationships are the same as those in the first specific implementation mode.

[0066] Specific implementation method three: Combination Figure 5 and Figure 6 To describe this embodiment, a throttle plug 590 is installed in the second radial oil inlet hole 542 in this embodiment.

[0067] The other components and connection relationships are the same as those in the first or second specific implementation.

[0068] Specific implementation method four: Combination Figure 2 and Figure 7 To explain this embodiment, in this embodiment, the tail cover 900 and the oil supply shaft 300 are rotatably connected via a rolling bearing 1000 .

[0069] The other components and connection relationships are the same as those of the first, second or third specific implementation modes.

[0070] Specific implementation method five: Combination Figures 2 to 7 To explain this embodiment, in this embodiment, the oil supply shaft 300, the sealing flange 400 and the rotating sealing sleeve 500 are all made of alloy steel.

[0071] Furthermore, the material of the housing sealing ring 1110 is nitrile rubber or polyurethane rubber.

[0072] Other components and connection relationships are the same as those of the first, second, third or fourth specific implementation modes.

[0073] How it works

[0074] Combination Figures 2 to 8The working principle of the present invention is described:

[0075] When the present invention is working, the rotary seal seat 600 does not rotate, and the oil supply shaft 300, the active impeller 310 and the sealing flange 400 all rotate together with the equipment shaft 20 at an absolute speed of n1.

[0076] The high-pressure working oil with a pressure of P2 flows through the high-pressure radial oil inlet 610, the outer working oil ring groove 540, the first radial oil inlet hole 541, the inner working oil ring groove 340, the fourth radial oil inlet hole and the second axial oil outlet hole 380 in sequence and then enters the second axial oil inlet hole 22.

[0077] The low-pressure lubricating oil with a pressure of P1 is divided into two paths, and the low-pressure lubricating oil in one path flows through the low-pressure radial oil inlet 620, the outer lubricating oil ring groove 520, the second radial oil inlet hole 542, the first axial oil outlet hole 580 and the third axial oil outlet hole 390 in sequence and then enters the first axial oil inlet hole 21.

[0078] The other low-pressure lubricating oil flows through the low-pressure radial oil inlet 620, the outer lubricating oil ring groove 520, the second radial oil inlet hole 542 and the axial oil supply hole 594 in sequence and then enters the impeller cover 700. The low-pressure lubricating oil in the impeller cover 700 flows back to the interior of the equipment box 40 through the oil drain hole 640 and the oil return hole 41.

[0079] Since the active impeller 310 rotates at an absolute speed of n1 in the driven impeller housing 700, after the driven impeller housing 700 is filled with oil, under the hydraulic coupling effect, the active impeller 310 drives the driven impeller housing 700 to rotate (the specific driving principle is: after the oil enters the driven impeller housing 700, it is stirred or ejected by the active impeller 310, and the generated kinetic energy impacts the left impeller housing 710 and the right impeller housing 730, and then the driven impeller housing 700 rotates), the driven impeller housing 700 drives the rotating sealing sleeve 500 to rotate, and the rotation speed of the rotating sealing sleeve 500 will reach n2.

[0080] The rotation speed n2 of the rotating sealing sleeve 500 is adjusted in the following manner:

[0081] (1) Adjust the diameter of the throttle hole of the throttle plug 590 to change the amount of oil entering the axial oil supply hole 594. n2 is adjusted by changing the amount of oil;

[0082] (2) By adjusting the thickness of the driving torque adjustment pad 720, the axial distance between the right impeller housing 730 and the active impeller 310 can be controlled, and n2 can be adjusted by changing the magnitude of the hydraulic coupling force;

[0083] (3) Adjusting the thickness of the brake adjustment gasket 820 can control the axial distance between the brake impeller 800 and the right impeller housing 730 , and n2 can be adjusted by applying a braking torque to the right impeller housing 730 through the brake impeller 800 .

[0084] The inner diameter of the rotary sealing sleeve 500 is r, and the outer diameter is R. Therefore, the linear speeds of the inner and outer circumferential surfaces of the rotary sealing sleeve 500 are also different. According to the linear speed formula:

[0085] The linear velocity of the oil supply shaft 300 relative to the rotating sealing sleeve 500 is V1.

[0086]

[0087] The linear velocity of the rotating sealing sleeve 500 relative to the rotating sealing seat 600 is V2.

[0088]

[0089] Combination Figure 2 , Figure 4 and Figure 5 When the high-pressure working oil with a pressure of P2 flows through the high-pressure radial oil inlet 610, the outer working oil ring groove 540, the first radial oil inlet hole 541 and the inner working oil ring groove 340 in sequence, the inner rotating sealing ring 360 and the outer rotating sealing ring 560 are both subjected to the pressure P2, so the friction heating power of the inner rotating sealing ring 360 is set to P2V1, and the friction heating power of the outer rotating sealing ring 560 is set to P2V2.

[0090] By adjusting n2, P2V1=P2V2=[P][V], and V1=V2, we can get: (n1-n2)×r=n2×R, that is:

[0091]

[0092] Because n2 corresponds to [V], and [V] is the allowable linear speed of the seal, when the present invention is adopted, the available operating speed of the equipment shaft 20 is increased by (R / r)×n2 compared with the original n1, and the present invention can still meet the oil supply work of the equipment shaft 20.

[0093] The present invention has been disclosed as above with preferred embodiments, but it is not intended to limit the present invention. Any simple modification, equivalent changes and modifications made to the above implementation cases by any professional and technical personnel who do not deviate from the content of the technical solution of the present invention and based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A rotary oil supply device, characterized in that: It comprises an oil supply shaft (300), a sealing flange (400), a rotary sealing sleeve (500), a rotary sealing seat (600), a brake impeller (800), a sealing housing (1300) and a hydraulic drive unit (1400); One end of the oil supply shaft (300) is coaxially fixedly connected to the equipment shaft (20), the equipment shaft (20) is rotatably connected to the equipment housing (40), a first axial oil inlet hole (21) and a second axial oil inlet hole (22) are formed on the end surface of the equipment shaft (20), and an oil return hole (41) is formed on the equipment housing (40); A second axial oil outlet hole (380) and a third axial oil outlet hole (390) are formed on the end surface of the oil supply shaft (300), an inner working oil ring groove (340) and a fourth radial oil inlet hole are formed on the outer circumferential surface of the oil supply shaft (300), inner rotating sealing rings (360) are installed on both sides of the inner working oil ring groove (340), the inner working oil ring groove (340) is connected to the second axial oil outlet hole (380) through the fourth radial oil inlet hole, and the second axial oil outlet hole (380) is connected to the second axial oil inlet hole (22); The sealing flange (400) is coaxially mounted on the oil supply shaft (300), the rotating sealing sleeve (500) is coaxially sleeved on the oil supply shaft (300), one end of the rotating sealing sleeve (500) is coaxially inserted into the sealing flange (400), and the other end of the rotating sealing sleeve (500) is coaxially inserted into the rotating sealing seat (600); The sealing housing (1300) is installed on the equipment housing (40), and one end of the rotating sealing seat (600) is inserted into the sealing housing (1300). The other end of the rotating sealing seat (600) is installed with a tail cover (900), and the tail cover (900) is rotatably connected to the other end of the oil supply shaft (300); The hydraulic drive unit (1400) comprises a driving impeller (310), a driven impeller casing (700) and a braking impeller (800); The driven impeller casing (700) comprises a left impeller casing (710), a driving torque adjustment pad (720) and a right impeller casing (730) which are coaxially fixed in sequence, and the left impeller casing (710) is coaxially fixed to the end surface of the rotating sealing sleeve (500); The active impeller (310) is arranged in the cavity of the driven impeller housing (700), and the active impeller (310) is coaxially mounted on the oil supply shaft (300); The brake impeller (800) is arranged between the tail cover (900) and the right impeller housing (730), and the brake impeller (800) is coaxially mounted on the tail cover (900), and a brake adjustment gasket (820) is sandwiched between the brake impeller (800) and the tail cover (900); The two end surfaces of the rotary sealing sleeve (500) are respectively provided with a first axial oil outlet hole (580) and an axial oil supply hole (594) which are not connected to each other, and the first axial oil outlet hole (580) is connected to the first axial oil inlet hole (21) through a third axial oil outlet hole (390); An outer circumferential surface of the rotary sealing sleeve (500) is provided with an outer lubricating oil ring groove (520), an outer working oil ring groove (540), a first radial oil inlet hole (541), a second radial oil inlet hole (542) and a third radial oil inlet hole (543); External rotating seal rings (560) are installed on both sides of the external lubricating oil ring groove (520), and external rotating seal rings (560) are installed on both sides of the external working oil ring groove (540); The outer working oil ring groove (540) is connected to the inner working oil ring groove (340) through a first radial oil inlet hole (541), the outer lubricating oil ring groove (520) is connected to the first axial oil outlet hole (580) through a second radial oil inlet hole (542), the outer lubricating oil ring groove (520) is connected to the axial oil supply hole (594) through a third radial oil inlet hole (543), and the axial oil supply hole (594) is connected to the driven impeller cover (700); The rotary seal seat (600) is provided with a high-pressure radial oil inlet (610), a low-pressure radial oil inlet (620) and an oil drain hole (640); the high-pressure radial oil inlet (610) is communicated with the outer working oil ring groove (540), the low-pressure radial oil inlet (620) is communicated with the outer lubricating oil ring groove (520), and the driven impeller cover (700) and the oil return hole (41) are both communicated with the oil drain hole (640).

2. A rotary oil supply device according to claim 1, characterized in that: The sealing housing (1300) comprises a coaxially arranged stepped sealing housing (1100), a housing sealing ring (1110) and a sealing gland (1120); One end of the step sealing cover (1100) is mounted on the equipment box (40) by means of screws, the sealing gland (1120) is mounted on the other end of the step sealing cover (1100) by means of screws, the housing sealing ring (1110) is arranged between the step sealing cover (1100) and the sealing gland (1120), and the rotating sealing seat (600) is inserted into the housing sealing ring (1110).

3. A rotary oil supply device according to claim 2, characterized in that: A throttle plug (590) is installed in the second radial oil inlet hole (542).

4. A rotary oil supply device according to claim 3, characterized in that: The tail cover (900) is rotatably connected to the oil supply shaft (300) via a rolling bearing (1000).

5. A rotary oil supply device according to claim 4, characterized in that: It also includes a speed sensor (1200), which is mounted on the tail cover (900). The speed sensor (1200) is used to measure the speed of the rotating sealing sleeve (500).

6. A rotary oil supply device according to claim 5, characterized in that: The oil supply shaft (300), the sealing flange (400) and the rotating sealing sleeve (500) are all made of alloy steel.

7. A rotary oil supply device according to claim 6, characterized in that: The shell sealing ring (1110) is made of nitrile rubber or polyurethane rubber.

Images