Parallel split gearbox compensation vibration absorbing structure

Abstract

The present application relates to a kind of parallel shunt gearbox compensation vibration-absorbing structures, including box and being located in the shunt shaft of the box, the both ends of the box are bored, sliding bearing is fixedly installed in hole, the outer end surface of hole is equipped with cover plate, the middle part of the cover plate is equipped with via;The both ends of the shunt shaft are the stepped shaft that gradually decreases in diameter along the axial direction outward, including the first shaft and the second shaft connected;The first shaft is installed in the sliding bearing, the second shaft is slidably and rotatably installed in the via;Sliding bearing, shunt shaft, baffle and box form closed oil cavity;Two oil cavities formed at the both ends of the shunt shaft are filled with oil and are communicated by oil channel between the both, compared with prior art, the present application can reduce the axial displacement of shunt shaft in parallel shunt gearbox when operating, improve the reliability of gear box operation.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of gearboxes, in particular to a parallel split gearbox compensation vibration absorption structure. BACKGROUND

[0002] The parallel split gearbox is widely used in the construction material, metallurgy, energy saving and environmental protection industries. The parallel split gearbox adopts a symmetrical type, and the split shaft is supported by a rolling bearing at both ends. Two gears are arranged on the split shaft, and are engaged with two gears downstream to form two pairs of gears. The two pairs of gears have the same number of teeth, modulus and helix angle but opposite rotation directions, and theoretically the axial forces can be offset. However, due to manufacturing and assembly errors of parts, a certain axial force is generated during actual operation. The directionality or size of the axial force changes and drives the shaft displacement, so that the split shaft repeatedly moves during operation. This shaft movement phenomenon reduces the reliability of the gearbox operation. Specifically, first, the repeated axial movement of the inner and outer rings of the rolling bearing affects the service life of the bearing, and the replacement cost is high. Second, due to the rigid support, the vibration and noise generated by the axial movement are inevitably transmitted to the gearbox housing, resulting in frequent alarm of the vibration data obtained in daily monitoring, and the gearbox has to be shut down for inspection to adjust the vibration data. Finally, the axial movement accelerates the wear of the sealing element, and the sealing performance is reduced. Initially, it shows oil leakage and then develops into damage. SUMMARY

[0003] The present application aims to solve the problem of the split shaft repeatedly moving in the axial direction during the operation of the parallel split gearbox in the prior art, which reduces the reliability of the gearbox operation. The present application provides a parallel split gearbox compensation vibration absorption structure.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the present application is as follows:

[0005] A parallel split gearbox compensation vibration absorption structure, comprising a housing and a split shaft arranged in the housing. The housing is provided with holes at both ends, and sliding bearings are fixedly installed in the holes. The outer end surface of the hole is provided with a cover plate, and the cover plate is provided with a through hole in the middle. Both ends of the split shaft are stepped shafts with diameters gradually decreasing outward along the axial direction, and the stepped shafts comprise a first shaft and a second shaft connected with each other. The first shaft is installed in the sliding bearing, and the second shaft is slidably and rotatably installed in the through hole. The sliding bearing, the split shaft, the partition plate and the housing form a closed oil cavity. Both oil cavities formed at both ends of the split shaft are filled with oil and are connected through an oil channel.

[0006] The application adopting the foregoing technical scheme, under the oil pressure balance state of the two end oil chambers, the axial movement of the shunt shaft will be buffered by the lubricating oil, specifically, by setting the shunt shaft at both ends as a stepped shaft with the diameter gradually decreasing along the axial direction outward, the diameter of the first shaft is greater than that of the second shaft, so that when the shunt shaft moves to one side, the volume of the oil chamber on this side decreases, the oil pressure rapidly increases, and the greater oil pressure generates resistance to the movement of the shunt shaft; similarly, the volume of the oil chamber on the other side increases, the oil pressure rapidly decreases, and the smaller oil pressure also generates resistance to the movement of the shunt shaft; the two together buffer the movement of the shunt shaft and reduce the movement amount; then, the lubricating oil flows from the oil chamber with the decreased volume to the oil chamber with the increased volume, and the oil pressure balance on both sides is achieved again; compared with the parallel shunt gear box in the prior art, the axial movement of the shunt shaft during the operation of the parallel shunt gear box is reduced, and the reliability of the operation of the gear box is improved.

[0007] Further, the second shaft is provided with a fixed ring, the fixed ring is inserted into the through hole, and a sealing ring is embedded on the inner wall of the through hole; the diameter of the first shaft is greater than that of the fixed ring; in this way, the second shaft is prevented from directly contacting the cover plate, and the fixed ring is directly contacted with the cover plate, and the fixed ring can be replaced if it is worn.

[0008] Further, the sealing ring is made of fluorine fiber material, and the fixed ring is made of phosphor bronze material; the main component of fluorine fiber is polytetrafluoroethylene, which has good wear resistance, self-lubricating property and corrosion resistance; phosphor bronze is a relatively soft material, and slight wear will occur between the two during the movement of the shunt shaft, but the wear can be ignored due to the formation of an oil film on the joint surface, and a good sealing effect is achieved.

[0009] Further, a third shaft is connected between the first shaft and the second shaft, an annular support plate is sleeved on the third shaft, the support plate can rotate relative to the shunt shaft, the inner end surface of the support plate abuts against the end surface of the first shaft, and a damping spring is arranged between the outer end surface of the support plate and the cover plate; in this way, when the shunt shaft moves axially to one side, the damping spring on this side is compressed to provide an axial force opposite to the movement direction, thereby buffering the movement and reducing the movement amount, which is beneficial to the stable operation of the gear box.

[0010] Further, a plurality of damping springs are circumferentially distributed between the outer end surface of the support plate and the cover plate; the circumferentially distributed damping springs can ensure that the shunt shaft is uniformly stressed and prevent the axial deviation caused by uneven stress.

[0011] Furthermore, the third shaft is provided with a thread, and a limiting nut is installed on the third shaft in conjunction with the thread; along the central axis of the diversion shaft, the support plate is located between the limiting nut and the first shaft; the limiting nut and the first shaft can axially limit the support plate, so that it moves axially as the diversion shaft moves axially, thereby driving the damping spring to extend or compress, so that no matter which side the diversion shaft moves to, the damping springs on both sides can play a buffering and shock-absorbing role.

[0012] Furthermore, the outer and inner end faces of the sliding bearing are each provided with circumferentially distributed self-aligning thrust blocks; the splitting shaft includes a fourth shaft located between the first shafts at both ends, the diameter of which is larger than that of the first shaft; an annular groove is formed between the support plate, the first shaft, and the fourth shaft, and the sliding bearing is embedded in the annular groove; with this configuration, when the splitting shaft reciprocates axially, the outer end face of the sliding bearing will abut against the support plate, or the inner end face of the sliding bearing will abut against the fourth shaft, and the self-aligning thrust blocks are used to bear the axial force. At the same time, since the oil cavity is filled with oil, an oil film will be formed between the outer end face of the sliding bearing and the support plate, which has a buffering and shock-absorbing effect on the relative movement of the two, and thus has a buffering and shock-absorbing effect on the axial movement of the splitting shaft, reducing its movement and facilitating the smooth operation of the gearbox.

[0013] Furthermore, the outer side of the cover plate is provided with an outer end cover, and the inner side of the outer end cover is provided with an oil storage tank. The oil storage tank is connected to the through hole, and the outer end cover is also provided with an oil discharge hole that connects the oil storage tank to the outside. If the gearbox has been used for a long time, the fixed ring and the cover plate seal will wear and leak oil, and the lubricating oil can also enter the oil storage tank and be discharged from the oil discharge hole.

[0014] The beneficial effects of this invention are as follows: it can reduce the axial movement of the internal split shaft of the parallel split gearbox during operation, thereby improving the reliability of gearbox operation; the setting of the damping spring and the oil film formed between the outer end face of the sliding bearing and the support plate both have a buffering and shock-absorbing effect on the axial movement of the split shaft, reducing the amount of movement and facilitating the smooth operation of the gearbox; the fixed ring is made of phosphor bronze and the sealing ring on the cover plate is made of fluorine fiber material. With the formation of the oil film, the wear between the two can be ignored, resulting in a good sealing effect. Attached Figure Description

[0015] Fig. 1 This is a schematic diagram of the structure of the present invention;

[0016] Fig. 2 This is an enlarged view of the structure at the end of the splitter shaft.

[0017] The markings in the diagram are: 1-Diverter shaft, 2-Sliding bearing, 3-Self-aligning thrust block, 4-Support plate, 5-Limit nut, 6-Washer, 7-Fixing ring, 8-Sealing ring, 9-Damping spring, 10-Outer end cover, 11-Cover plate, 12-Box body, 13-First shaft, 14-Second shaft, 15-Third shaft, 16-Fourth shaft, 17-Oil reservoir, 18-Oil discharge hole, 01-First oil chamber, 02-Second oil chamber. Detailed Implementation

[0018] The present invention will now be described in detail with reference to the accompanying drawings.

[0019] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0020] This invention provides a parallel flow splitter gearbox vibration compensation and absorption structure, such as... Figs. 1-2 As shown, the device includes a housing 12 and a distribution shaft 1 disposed within the housing 12. The housing 12 has openings at both ends, with sliding bearings 2 fixedly installed inside the openings. A cover plate 11 is provided on the outer end face of each opening, and a through hole is provided in the center of the cover plate 11. Both ends of the distribution shaft 1 are stepped shafts with a gradually decreasing diameter along the axial direction, including a first shaft 13 and a second shaft 14 connected together. The first shaft 13 is installed inside the sliding bearings 2, and the second shaft 14 is slidably and rotatably installed inside the through hole. The sliding bearings 2, the distribution shaft 1, the partition plate 11, and the housing 12 together form a sealed oil chamber. Both oil chambers formed at both ends of the distribution shaft 1 are filled with oil and are connected by an oil passage. Specifically, the two oil chambers are a first oil chamber 01 and a second oil chamber 02, and the oil passage between them can be a pipe outside the housing 12, not shown in the figure.

[0021] A fixed ring 7 is fixedly sleeved on the second shaft 14. The fixed ring 7 is inserted into the through hole, and a sealing ring 8 is embedded in the inner wall of the through hole. The diameter of the first shaft 13 is larger than that of the fixed ring 7. Alternatively, the second shaft 14 can be directly inserted into the through hole, with a sealing ring between the two.

[0022] The sealing ring 8 is made of fluorinated fiber, and the retaining ring 7 is made of phosphor bronze.

[0023] A third shaft 15 is connected between the first shaft 13 and the second shaft 14. A ring-shaped support plate 4 is sleeved on the third shaft 15. The support plate 4 can rotate relative to the diversion shaft 1. Its inner end face abuts against the end face of the first shaft 13, and a damping spring 9 is provided between its outer end face and the cover plate 11.

[0024] It includes several damping springs 9, which are evenly distributed circumferentially between the outer end face of the support plate 4 and the cover plate 11; specifically, the number of damping springs 9 is 8-12.

[0025] The third shaft 15 is threaded, and a limiting nut 5 is installed on the third shaft in conjunction with the thread; along the central axis of the diversion shaft 1, the support plate 4 is located between the limiting nut 5 and the first shaft 13; a washer 6 can also be provided between the limiting nut 5 and the support plate 4 to prevent wear between the two.

[0026] The outer and inner end faces of the sliding bearing 2 are provided with circumferentially distributed self-aligning thrust blocks 3; the diversion shaft 1 includes a fourth shaft 16 located between the first shafts 13 at both ends, and its diameter is larger than that of the first shafts 13; an annular groove is formed between the support plate 4, the first shaft 13 and the fourth shaft 16, and the sliding bearing 2 is embedded in the annular groove; specifically, it can also be configured such that each self-aligning thrust block 3 corresponds to a branch hydraulic oil supply device, and a flow distributor is configured at both ends of the diversion shaft 1 for compensation, so as to ensure that the oil supply to each side of the sliding bearing 2 maintains uniform pressure;

[0027] The outer side of the cover plate 11 is provided with an outer end cover 10, and the inner side of the outer end cover 10 is provided with an oil storage tank 17. The oil storage tank 17 is connected to the through hole, and the outer end cover 10 is also provided with an oil discharge hole 18 that connects the oil storage tank 17 to the outside.

[0028] In this invention employing the aforementioned technical solution, under the condition of balanced oil pressure in both oil chambers, the axial movement of the split shaft 1 will be buffered by the lubricating oil. Specifically, by setting both ends of the split shaft 1 as stepped shafts with gradually decreasing diameters along the axial direction, the diameter of the first shaft 13 is larger than that of the second shaft 14. This ensures that when the split shaft 1 moves to one side, the volume of the oil chamber on that side decreases, and the oil pressure increases rapidly. The larger oil pressure resists the movement of the split shaft 1. Similarly, the volume of the oil chamber on the other side increases, and the oil pressure decreases rapidly. The smaller oil pressure also resists the movement of the split shaft 1. Both of these factors together buffer the movement and reduce its magnitude. Subsequently, the lubricating oil flows from the oil chamber on the side with decreasing volume into the oil chamber with increasing volume. The large side oil chamber achieves oil pressure balance on both sides again. Compared with the existing parallel split-flow gearbox, where the split shaft repeatedly moves axially during operation, reducing the reliability of the gearbox, this invention can reduce the axial movement of the internal split shaft during operation, thus improving the reliability of the gearbox. At the same time, the damping spring and the oil film formed between the outer end face of the sliding bearing and the support plate both buffer and dampen the axial movement of the split shaft, reducing the amount of movement and facilitating the smooth operation of the gearbox. The fixed ring is made of phosphor bronze, and the sealing ring on the cover plate is made of fluorinated fiber. With the formation of the oil film, the wear between the two is negligible, resulting in a good sealing effect.

[0029] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A parallel split-flow gearbox vibration-damping structure, comprising a housing (12) and a split-flow shaft (1) disposed within the housing (12), characterized in that: The housing (12) has openings at both ends, and sliding bearings (2) are fixedly installed in the openings. A cover plate (11) is provided on the outer end face of the opening, and a through hole is provided in the middle of the cover plate (11). Both ends of the split shaft (1) are stepped shafts with a gradually decreasing diameter along the axial direction, including a first shaft (13) and a second shaft (14) connected to each other. The first shaft (13) is installed in the sliding bearing (2), and the second shaft (14) is slidably and rotatably installed in the through hole. The sliding bearing (2), the split shaft (1), the cover plate (11) and the housing (12) together form a closed oil cavity. The two oil cavities formed at both ends of the split shaft (1) are filled with oil and are connected to each other through an oil passage. A fixed ring (7) is fixedly sleeved on the second shaft (14), the fixed ring (7) is inserted into the through hole, and a sealing ring (8) is embedded in the inner wall of the through hole; the diameter of the first shaft (13) is larger than the fixed ring (7). The sealing ring (8) is made of fluorine fiber, and the fixing ring (7) is made of phosphor bronze. A third shaft (15) is connected between the first shaft (13) and the second shaft (14). A ring-shaped support plate (4) is sleeved on the third shaft (15). The support plate (4) can rotate relative to the diversion shaft (1). Its inner end face abuts against the end face of the first shaft (13), and its outer end face is provided with a damping spring (9) between it and the cover plate (11). It includes several damping springs (9), which are evenly distributed circumferentially between the outer end face of the support plate (4) and the cover plate (11).

2. The parallel flow splitter gearbox vibration compensation and absorption structure according to claim 1, characterized in that: The third shaft (15) is threaded, and a limiting nut (5) is installed on the third shaft in conjunction with the thread; along the central axis of the diversion shaft (1), the support plate (4) is located between the limiting nut (5) and the first shaft (13).

3. The parallel flow splitter gearbox vibration compensation and absorption structure according to claim 2, characterized in that: The sliding bearing (2) is provided with circumferentially distributed self-aligning thrust blocks (3) on both the outer and inner end faces; the splitting shaft (1) includes a fourth shaft (16) located between the first shaft (13) at both ends, and its diameter is larger than that of the first shaft (13); an annular groove is formed between the support plate (4), the first shaft (13) and the fourth shaft (16), and the sliding bearing (2) is embedded in the annular groove.

4. The parallel split-flow gearbox vibration-absorbing structure according to claim 1, characterized in that: The cover plate (11) is provided with an outer end cap (10) on the outside, and an oil storage tank (17) is provided on the inner side of the outer end cap (10). The oil storage tank (17) is connected to the through hole, and the outer end cap (10) is also provided with an oil discharge hole (18) that connects the oil storage tank (17) to the outside.

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