Packing sealing type drying cylinder bearing structure

Abstract

The invention provides a packing sealing type drying cylinder bearing structure, and relates to the field of bearings, the packing sealing type drying cylinder bearing structure comprises two bearing inner rings, and the two bearing inner rings are in interference connection with the outer side of a drying cylinder connecting shaft; the number of the inner ring fixing rings is two, and the two inner ring fixing rings are fixedly connected to the outer sides of the two bearing inner rings correspondingly. The two groups of bearing rolling bodies are respectively connected to the outer side of the bearing inner ring in a rolling manner; the number of the bearing outer rings is two, and the two bearing outer rings wrap the outer sides of the two sets of bearing rolling bodies respectively, so that the problems that in the operation process of an existing packing sealing type drying cylinder bearing structure, along with long-time operation, lubricating grease in a bearing is gradually consumed, once the storage amount of the lubricating grease is insufficient, the service life of the bearing is shortened, and the service life of the bearing is shortened are solved. The problems that lubricating grease needs to be supplemented into the packing sealing type drying cylinder bearing every specific time, and frequent maintenance operation inevitably affects the production efficiency are solved, and the working efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of bearings, and in particular to a packing-sealed drying drum bearing structure. Background Art

[0002] As a drying equipment widely used in many industries such as textile, printing and dyeing, the stuffing-sealed dryer plays an extremely important role in the drying process of fabrics. For the stuffing-sealed dryer, in order to ensure that the stuffing-sealed dryer can maintain a stable and smooth operation state, bearings are usually installed inside the dryer. The existence of the bearings effectively reduces the friction generated by the dryer during operation. In this way, the dryer can complete the task of drying fabrics more efficiently, effectively ensuring the continuous advancement and normal operation of the textile printing and dyeing production process.

[0003] According to the application number: CN202123095398.6, a heating drum bearing structure of a spunlace nonwoven production line is disclosed, which includes a frame body, a drying drum body is arranged on one side of the top of the frame body, a group of bearing seats are fixedly installed on the inner top wall of the frame body close to the drying drum body, and rolling bearings are arranged on the outer ends of the bearing seats. A sliding guide rail is fixedly installed on the side of the outer wall of the drying drum body corresponding to the rolling bearing, a group of rollers are arranged on the inner top wall of the frame body close to the rolling bearing, a connecting ring is fixedly installed on one side of the outer end of the drying drum body, and an outer cover is hinged on one side of the outer end of the drying drum body. The heating drum bearing structure of a spunlace nonwoven production line described in the utility model can enable the overall device to realize simple and convenient maintenance of the drying drum, effectively improve the work efficiency of the users, improve the practicality of the overall device, and bring better prospects for use.

[0004] However, during the operation of the existing packing-sealed drying drum bearing structure, due to the high rotation speed of the drying drum, the grease inside the bearing will be gradually consumed with long-term operation. Once the grease stock is insufficient, the friction between the bearing components will intensify, which can easily cause wear phenomena, such as surface scratches between the ball and the raceway, excessive friction between the journal and the bearing shell, etc. This will not only reduce the service life of the bearing, but may also affect the overall operation stability of the drying drum. To address this problem, the conventional practice is to add grease to the packing-sealed drying drum bearing at specific intervals to ensure its normal operation. However, frequent maintenance operations not only increase the investment in manpower and material resources, but also inevitably affect production efficiency, causing many inconveniences and economic losses to the company's production operations. Summary of the invention

[0005] In view of this, the present invention provides a packing-sealed drying drum bearing structure, which has the advantages of improving working efficiency, reducing wear and reducing use costs.

[0006] The present invention provides a packing seal type drying drum bearing structure, which specifically comprises a drying drum connecting shaft, a bearing inner ring, an inner ring fixing ring, a bearing rolling element, a bearing outer ring, an outer ring fixing ring, a bearing sleeve, a bearing sealing end cover, a lubrication supplement mechanism and a circulating lubrication mechanism; the bearing inner rings are provided with two, and the two bearing inner rings are both interference connected to the outer side of the drying drum connecting shaft; the inner ring fixing rings are provided with two, and the two inner ring fixing rings are respectively fixedly connected to the outer sides of the two bearing inner rings; the bearing rolling elements are provided with two groups, and the two groups of bearing rolling elements are respectively rolling connected to the outer sides of the bearing inner rings; the bearing outer rings are provided with two, and the two bearing outer rings are respectively covered on the outer sides of the two groups of bearing rolling elements; the outer ring fixing rings are fixedly connected to the two, and the two outer ring fixing rings are respectively fixedly connected to the outer sides of the two bearing outer rings; the bearing sleeve is interference connected to the outer sides of the two bearing outer rings; the bearing sealing end covers are provided with two, and the two bearing sealing end covers are both threadedly connected to the outer side of the bearing sleeve; the lubrication supplement mechanism is arranged on the inner side of the bearing sleeve; and the circulating lubrication mechanism is arranged on the inner side of the bearing outer ring.

[0007] Furthermore, the lubrication replenishment mechanism includes: a sliding piston plate and a lubrication replenishment spring; two sliding piston plates are provided, and both sliding piston plates are slidably connected to the inner side of the mounting bearing sleeve; the lubrication replenishment spring is fixedly connected to the inner side of the two sliding piston plates.

[0008] Furthermore, the lubrication replenishing mechanism also includes: a connecting inner sleeve, a sliding sealing ring and a lubrication replenishing rotating shaft; the connecting inner sleeve is slidably connected to the inner sides of the two sliding piston plates; two sliding sealing rings are provided, and both sliding sealing rings are slidably connected to the inner side of the connecting inner sleeve; two lubrication replenishing rotating shafts are provided, one end of the two lubrication replenishing rotating shafts are respectively fixedly connected to the outer sides of the two sliding sealing rings, and the other ends of the two lubrication replenishing rotating shafts are fixedly connected to the inner side of the connecting inner sleeve.

[0009] Furthermore, the circulating lubrication mechanism includes: a bearing lubrication bin and a bearing lubrication port; the bearing lubrication bin is provided with two groups, and the two groups of bearing lubrication bins are respectively opened on the inner sides of the two bearing outer rings; the bearing lubrication port is provided with two groups, and the two groups of bearing lubrication ports are respectively opened on the outer sides of the two bearing outer rings, and the bearing lubrication port is connected to the bearing lubrication bin.

[0010] Furthermore, the circulating lubrication mechanism also includes: a bearing lubrication groove and a bearing lubrication tube; the bearing lubrication groove is provided with two groups, the two groups of bearing lubrication grooves are respectively opened on the inner sides of the two bearing outer rings, and the bearing lubrication groove is connected to the bearing lubrication chamber; the bearing lubrication tube is provided with two groups, the two groups of bearing lubrication tubes are respectively opened on the inner sides of the two bearing outer rings, and the bearing lubrication tube is connected to the bearing lubrication groove.

[0011] Furthermore, the circulating lubrication mechanism also includes: a grease return pipe; the grease return pipe is provided with two groups, the two groups of grease return pipes are respectively opened on the inner sides of the two bearing outer rings, and the grease return pipes are connected to the bearing lubrication chamber.

[0012] Furthermore, the circulating lubrication mechanism also includes: a connecting and fixing frame, a lubricating shaft and a lubricating spiral blade; the connecting and fixing frame is provided with two groups, and the two groups of connecting and fixing frames are respectively fixedly connected to the inner sides of the two groups of bearing lubrication grooves; the lubricating shaft is provided with two groups, and the two groups of lubricating shafts are respectively rotatably connected to the inner sides of the two groups of connecting and fixing frames; the lubricating spiral blades are provided with two groups, and the two groups of lubricating spiral blades are respectively fixedly connected to the outer sides of the two groups of lubricating shafts.

[0013] Furthermore, the circulating lubrication mechanism also includes: a fixed gear ring and a connecting gear; the fixed gear ring is provided with two, and the two fixed gear rings are respectively fixedly connected to the outer sides of the two inner ring fixed rings; the connecting gear is provided with two groups, and the two groups of connecting gears are respectively fixedly connected to the outer sides of the two groups of lubrication shafts, and the connecting gears are meshed with the fixed gear rings.

[0014] Beneficial Effects

[0015] The present invention realizes the replenishment of the internal grease of the packing seal type drying drum bearing by setting the lubrication replenishment mechanism. After the grease is injected into the mounting bearing sleeve, the two bearings are assembled into the mounting bearing sleeve. At this time, the sliding sealing ring will be fitted to the outer side of the bearing outer ring under the push of the lubrication replenishment shaft, and the sliding piston plate will continue to transport grease to the bearing under the action of the lubrication replenishment spring, thereby ensuring that the internal parts of the bearing are fully lubricated, effectively extending the maintenance cycle and improving work efficiency.

[0016] In addition, by setting up the circulating lubrication mechanism, continuous lubrication of the internal parts of the packing sealed drying drum bearing is achieved. When the grease in the installed bearing sleeve is squeezed by the sliding piston plate, the grease will enter the bearing lubrication bin through the bearing lubrication port. In this process, the operation of the drying drum will drive the bearing inner ring to rotate with the help of the drying drum connecting shaft, and the rotation of the bearing inner ring will drive the fixed gear ring to rotate through the inner ring fixing ring. The rotation of the fixed gear ring drives the lubrication spiral blade to rotate with the help of the lubrication shaft under the meshing action with the connecting gear. The rotation of the lubrication spiral blade pushes the grease in the bearing lubrication bin to the bearing lubrication groove, and then presses the grease into the inside of the bearing through the bearing lubrication pipe, so as to lubricate the parts in the bearing. With the continuous injection of grease, once there is too much grease in the bearing, the grease therein will be squeezed by the grease injected into the bearing lubrication pipe, and return to the bearing lubrication bin through the grease return pipe, thereby continuously lubricating the bearing rolling element. In this way, it can effectively prevent the occurrence of severe wear of the bearing due to insufficient grease in the packing sealed drying drum bearing, reduce wear, extend the service life and reduce economic losses.

[0017] In addition, through the arrangement of the above-mentioned mechanism, not only the internal grease of the packing-sealed drying drum bearing is replenished, the lubrication of the internal parts of the bearing is guaranteed, the maintenance interval is extended, and the work efficiency is improved, but also the continuous lubrication of the internal parts of the packing-sealed drying drum bearing is achieved, which avoids serious wear of the bearing caused by lack of grease, reduces the degree of wear, extends the service life and reduces economic losses. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solution of the embodiment of the present invention, the drawings of the embodiment are briefly introduced below.

[0019] The drawings described below are only related to some embodiments of the present invention, but are not intended to limit the present invention.

[0020] In the attached picture:

[0021] Figure 1 It is a structural schematic diagram of the subject of embodiment 1 of the present invention.

[0022] Figure 2 It is a schematic structural diagram of a bearing outer ring according to the first embodiment of the present invention.

[0023] Figure 3 It is a schematic structural diagram of a cross-section of the mounting bearing sleeve of the first embodiment of the present invention.

[0024] Figure 4 It is a schematic structural diagram of a cross-section of the connecting inner sliding sleeve of the first embodiment of the present invention.

[0025] Figure 5 Embodiment 1 of the present invention Figure 4 Schematic diagram of the structure with a partial enlargement at point A in the middle.

[0026] Figure 6 It is a schematic structural diagram of a cross-section of a bearing outer ring according to a second embodiment of the present invention.

[0027] Figure 7 It is a schematic structural diagram of a fixed gear ring according to the second embodiment of the present invention.

[0028] Figure 8 The second embodiment of the present invention Figure 6 Schematic diagram of the structure with a partial enlargement at point B in the middle.

[0029] Reference numerals list

[0030] 1. Drying drum connecting shaft; 2. Bearing inner ring; 201. Inner ring fixing ring; 3. Bearing rolling element; 4. Bearing outer ring; 401. Outer ring fixing ring; 402. Bearing lubrication chamber; 403. Bearing lubrication port; 404. Bearing lubrication groove; 405. Bearing lubrication pipe; 406. Grease return pipe; 407. Connecting fixed frame; 5. Installing bearing sleeve; 6. Bearing sealing end cover; 7. Sliding piston plate; 701. Lubrication supplement spring; 8. Connecting inner sliding sleeve; 801. Sliding sealing ring; 802. Lubrication supplement shaft; 9. Lubrication shaft; 901. Lubrication spiral blade; 10. Fixing gear ring; 11. Connecting gear. DETAILED DESCRIPTION

[0031] Embodiment 1:

[0032] Please refer to Figure 1-Figure 5 As shown:

[0033] The present invention provides a packing seal type drying drum bearing structure, comprising a drying drum connecting shaft 1, a bearing inner ring 2, an inner ring fixing ring 201, a bearing rolling element 3, a bearing outer ring 4, an outer ring fixing ring 401, a bearing sleeve 5, a bearing sealing end cover 6 and a lubrication replenishing mechanism; two bearing inner rings 2 are provided, and the two bearing inner rings 2 are both interference connected to the outside of the drying drum connecting shaft 1; two inner ring fixing rings 201 are provided, and the two inner ring fixing rings 201 are respectively fixedly connected to the outside of the two bearing inner rings 2; two groups of bearing rolling elements 3 are provided, and the two groups of bearings The rolling bodies 3 are rollingly connected to the outer sides of the bearing inner ring 2; two bearing outer rings 4 are provided, and the two bearing outer rings 4 are respectively covered on the outer sides of the two groups of bearing rolling bodies 3; the outer ring fixing rings 401 are fixedly connected to the two, and the two outer ring fixing rings 401 are respectively fixedly connected to the outer sides of the two bearing outer rings 4; the mounting bearing sleeve 5 is interference connected to the outer sides of the two bearing outer rings 4; two bearing sealing end covers 6 are provided, and the two bearing sealing end covers 6 are both threadedly connected to the outer sides of the mounting bearing sleeve 5; the lubrication replenishing mechanism is arranged on the inner side of the mounting bearing sleeve 5.

[0034] Among them, the lubrication replenishment mechanism includes: a sliding piston plate 7, a lubrication replenishment spring 701, a connecting inner sleeve 8, a sliding sealing ring 801 and a lubrication replenishment shaft 802; there are two sliding piston plates 7, and the two sliding piston plates 7 are both slidably connected to the inner side of the mounting bearing sleeve 5; the lubrication replenishment spring 701 is fixedly connected to the inner side of the two sliding piston plates 7; the connecting inner sleeve 8 is slidably connected to the inner side of the two sliding piston plates 7; there are two sliding sealing rings 801, and the two sliding sealing rings 801 are both slidably connected to the inner side of the connecting inner sleeve 8; there are two lubrication replenishment shafts 802, one end of the two lubrication replenishment shafts 802 is respectively fixedly connected to the outer sides of the two sliding sealing rings 801, and the other ends of the two lubrication replenishment shafts 802 are both fixedly connected to the inner side of the connecting inner sleeve 8.

[0035] The specific usage and function of this embodiment are as follows: add grease into the mounting bearing sleeve 5, and then install the two bearings into the mounting bearing sleeve 5. At this time, the sliding sealing ring 801 will press against the outer side of the bearing outer ring 4 under the action of the lubrication replenishing shaft 802, and the sliding piston plate 7 will continue to transport grease into the bearing under the action of the lubrication replenishing spring 701 to ensure the lubrication of the internal parts of the bearing.

[0036] Embodiment 2:

[0037] On the basis of the first embodiment, Figure 6-Figure 8 As shown, the circulating lubrication mechanism includes: a bearing lubrication bin 402, a bearing lubrication port 403, a bearing lubrication groove 404, a bearing lubrication pipe 405, a grease return pipe 406, a connecting and fixing frame 407, a lubrication shaft 9, a lubrication spiral blade 901, a fixed gear ring 10 and a connecting gear 11; the circulating lubrication mechanism is arranged on the inner side of the bearing outer ring 4; there are two groups of bearing lubrication bins 402, and the two groups of bearing lubrication bins 402 are respectively opened on the inner sides of the two bearing outer rings 4; there are two groups of bearing lubrication ports 403, and the two groups of bearing lubrication ports 403 are respectively opened on the outer sides of the two bearing outer rings 4, and the bearing lubrication ports 403 are connected with the bearing lubrication bin 402; there are two groups of bearing lubrication grooves 404, and the two groups of bearing lubrication grooves 404 are respectively opened on the inner sides of the two bearing outer rings 4, and the bearing lubrication grooves 404 are connected with the bearing lubrication bin 402; there are two groups of bearing lubrication pipes 405, and the two groups of bearing lubrication pipes 405 are respectively opened on the inner sides of the two bearing outer rings On the inner side of the ring 4, the bearing lubrication pipe 405 is connected with the bearing lubrication groove 404; two groups of grease return pipes 406 are provided, and the two groups of grease return pipes 406 are respectively opened on the inner sides of the two bearing outer rings 4, and the grease return pipes 406 are connected with the bearing lubrication chamber 402; two groups of connecting and fixing frames 407 are provided, and the two groups of connecting and fixing frames 407 are respectively fixedly connected to the inner sides of the two groups of bearing lubrication grooves 404; two groups of lubricating shafts 9 are provided, and the two groups of lubricating shafts 9 are respectively rotatably connected to the inner sides of the two groups of connecting and fixing frames 407; two groups of lubricating spiral blades 901 are provided, and the two groups of lubricating spiral blades 901 are respectively fixedly connected to the outer sides of the two groups of lubricating shafts 9; two fixed gear rings 10 are provided, and the two fixed gear rings 10 are respectively fixedly connected to the outer sides of the two inner ring fixing rings 201; two groups of connecting gears 11 are provided, and the two groups of connecting gears 11 are respectively fixedly connected to the outer sides of the two groups of lubricating shafts 9, and the connecting gears 11 are meshed with the fixed gear rings 10.

[0038] Specific usage and function of this embodiment: when the grease of the installed bearing sleeve 5 is squeezed by the sliding piston plate 7, the grease will enter the bearing lubrication chamber 402 through the bearing lubrication port 403. At this time, the operation of the drying drum will drive the bearing inner ring 2 to rotate through the drying drum connecting shaft 1. The rotation of the bearing inner ring 2 will drive the fixed gear ring 10 to rotate through the inner ring fixing ring 201. The rotation of the fixed gear ring 10 will drive the lubrication spiral blade 901 to rotate through the lubrication shaft 9 under the action of meshing with the connecting gear 11. The rotation of the lubrication spiral blade 901 will send the grease in the bearing lubrication chamber 402 into the bearing lubrication groove 404, and then squeeze the grease into the bearing through the bearing lubrication pipe 405 to lubricate the parts in the bearing. With the continuous injection of grease, when there is too much grease in the bearing, the grease in the bearing will be squeezed by the grease injected into the bearing by the bearing lubrication pipe 405 and flow back to the bearing lubrication chamber 402 through the grease return pipe 406 to continuously lubricate the bearing rolling element 3.

[0039] In this article, there are a few points to note:

[0040] 1. The drawings of the embodiments of the present disclosure only involve structures related to the embodiments of the present disclosure, and other structures may refer to general designs.

[0041] 2. In the absence of conflict, the embodiments of the present disclosure and the features therein may be combined with each other to obtain new embodiments.

[0042] The above are only specific embodiments of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present disclosure, which should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.

Claims

1. A packing seal type drying drum bearing structure, comprising a drying drum connecting shaft (1), a bearing inner ring (2), an inner ring fixing ring (201), bearing rolling elements (3), a bearing outer ring (4), an outer ring fixing ring (401), a bearing sleeve (5), a bearing sealing end cover (6), a lubrication replenishing mechanism and a circulating lubrication mechanism; the bearing inner ring (2) is provided with two, and the two bearing inner rings (2) are both interference-connected to the outer side of the drying drum connecting shaft (1); the inner ring fixing ring (201) is provided with two, and the two inner ring fixing rings (201) are respectively fixedly connected to the outer sides of the two bearing inner rings (2); the bearing rolling elements (3) are provided with two groups, and the two groups of bearing rolling elements (3) are respectively rolling-connected to the outer sides of the bearing inner ring (2); the characteristics are: The bearing outer rings (4) are provided with two, and the two bearing outer rings (4) are respectively covered on the outer sides of the two groups of bearing rolling elements (3); the outer ring fixing rings (401) are fixedly connected to the two, and the two outer ring fixing rings (401) are respectively fixedly connected to the outer sides of the two bearing outer rings (4); the mounting bearing sleeve (5) is interference-connected to the outer sides of the two bearing outer rings (4); the bearing sealing end covers (6) are provided with two, and the two bearing sealing end covers (6) are both threadedly connected to the outer sides of the mounting bearing sleeves (5); the lubrication replenishing mechanism is arranged on the inner side of the mounting bearing sleeves (5); and the circulating lubrication mechanism is arranged on the inner side of the bearing outer ring (4).

2. A packing seal type drying drum bearing structure as claimed in claim 1, characterized in that: The lubrication replenishment mechanism comprises: a sliding piston plate (7) and a lubrication replenishment spring (701); two sliding piston plates (7) are provided, and both sliding piston plates (7) are slidably connected to the inner side of the mounting bearing sleeve (5); the lubrication replenishment spring (701) is fixedly connected to the inner sides of the two sliding piston plates (7).

3. A packing seal type drying drum bearing structure as claimed in claim 2, characterized in that: The lubrication replenishment mechanism also includes: a connecting inner sleeve (8), a sliding sealing ring (801) and a lubrication replenishment shaft (802); the connecting inner sleeve (8) is slidably connected to the inner sides of the two sliding piston plates (7); two sliding sealing rings (801) are provided, and both sliding sealing rings (801) are slidably connected to the inner side of the connecting inner sleeve (8); two lubrication replenishment shafts (802) are provided, one end of the two lubrication replenishment shafts (802) is respectively fixedly connected to the outer sides of the two sliding sealing rings (801), and the other ends of the two lubrication replenishment shafts (802) are both fixedly connected to the inner side of the connecting inner sleeve (8).

4. A packing seal type drying drum bearing structure as claimed in claim 1, characterized in that: The circulating lubrication mechanism comprises: a bearing lubrication bin (402) and a bearing lubrication port (403); the bearing lubrication bin (402) is provided with two groups, and the two groups of bearing lubrication bins (402) are respectively opened on the inner sides of two bearing outer rings (4); the bearing lubrication port (403) is provided with two groups, and the two groups of bearing lubrication ports (403) are respectively opened on the outer sides of two bearing outer rings (4), and the bearing lubrication ports (403) are communicated with the bearing lubrication bin (402).

5. A packing seal type drying drum bearing structure as claimed in claim 4, characterized in that: The circulating lubrication mechanism further comprises: a bearing lubrication groove (404) and a bearing lubrication tube (405); the bearing lubrication groove (404) is provided with two groups, the two groups of bearing lubrication grooves (404) are respectively opened on the inner sides of the two bearing outer rings (4), and the bearing lubrication grooves (404) are communicated with the bearing lubrication chamber (402); the bearing lubrication tube (405) is provided with two groups, the two groups of bearing lubrication tubes (405) are respectively opened on the inner sides of the two bearing outer rings (4), and the bearing lubrication tubes (405) are communicated with the bearing lubrication groove (404).

6. A packing seal type drying drum bearing structure as claimed in claim 5, characterized in that: The circulating lubrication mechanism also includes: a grease return pipe (406); the grease return pipe (406) is provided with two groups, the two groups of grease return pipes (406) are respectively opened on the inner side of the two bearing outer rings (4), and the grease return pipes (406) are connected to the bearing lubrication chamber (402).

7. A packing seal type drying drum bearing structure as claimed in claim 6, characterized in that: The circulating lubrication mechanism further comprises: a connecting and fixing frame (407), a lubricating rotating shaft (9) and a lubricating spiral blade (901); the connecting and fixing frame (407) is provided with two groups, and the two groups of connecting and fixing frames (407) are respectively fixedly connected to the inner sides of the two groups of bearing lubrication grooves (404); the lubricating rotating shaft (9) is provided with two groups, and the two groups of lubricating rotating shafts (9) are respectively rotatably connected to the inner sides of the two groups of connecting and fixing frames (407); the lubricating spiral blade (901) is provided with two groups, and the two groups of lubricating spiral blades (901) are respectively fixedly connected to the outer sides of the two groups of lubricating rotating shafts (9).

8. A packing seal type drying drum bearing structure as claimed in claim 7, characterized in that: The circulating lubrication mechanism further comprises: a fixed gear ring (10) and a connecting gear (11); two fixed gear rings (10) are provided, and the two fixed gear rings (10) are respectively fixedly connected to the outside of the two inner ring fixed rings (201); two groups of connecting gears (11) are provided, and the two groups of connecting gears (11) are respectively fixedly connected to the outside of the two groups of lubrication rotating shafts (9), and the connecting gears (11) are meshed with the fixed gear rings (10).

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