CN201521622U

CN201521622U - Bearing configuration structure of high-power marine gearbox pinion shaft

Info

Publication number: CN201521622U
Application number: CN2009202065236U
Authority: CN
Inventors: 杜昌烈; 潘明星; 杨有生; 阳靖
Original assignee: Chongqing Gearbox Co Ltd
Current assignee: Chongqing Gearbox Co Ltd
Priority date: 2009-09-29
Filing date: 2009-09-29
Publication date: 2010-07-07
Anticipated expiration: 2019-09-29

Abstract

The utility model relates to a bearing configuration structure of a high-power marine gearbox pinion shaft; shaft necks at the two sides of a gear of a pinion shaft (20) are respectively provided with a double-row spherical roller bearing (21), a bearing at one side of the gear is a fixed bearing, and a bearing at the other side of the gear is a floating bearing; the excircle of the outer ring of the spherical roller bearing (21) is provided with a ring-shaped oil groove (21a); and the bottom part of the oil groove (21a) is provided with a radial oil hole (21b) penetrating the outer ring. The bearing configuration structure not only can bear the radial and the axial loads generated by gear engagement and ensure the carrying capacity, but also has the functions of automatically adjusting the center and bearing higher misalignment error; furthermore, compared with a short-cylinder roller bearing, the spherical roller bearing greatly reduces the rotary inertia of a rolling body, and the bearings are fully lubricated, so that the phenomenon of 'broom-finish' caused by slipping between a bearing roller and a bearing track can be greatly relieved, and the using reliability of the bearings and a gear box can be improved.

Description

The bearing configuration structure of high-power marine gearbox pinion shaft

Technical field

The utility model relates to a kind of bearing configuration of gearbox drive axle, specifically, relates to the bearing configuration structure of high-power marine gearbox pinion shaft.

Background technique

The pinion shaft of marine gearbox is the axle that is connected with clutch output terminal in the gear-box, and the gear of pinion shaft is meshed with the output shaft gear of gear-box.As shown in Figure 1, in the gear-box, power is delivered to

clutch gear

12,13 by input shaft 10 through gear pair 11, when first clutch 14 runs in, when second clutch 16 takes off row, realize the positive car of gear-box, second pinion shaft 17 this moment transferring power is not only dallied by the gear driven on the output shaft 18; Otherwise, when first clutch 14 takes off row, when second clutch 16 runs in, realizing the gear-box reversing, first pinion shaft 15 this moment transferring power is not only dallied by the gear driven on the output shaft 18.Pinion shaft is bearing in the box bearing hole by bearing, and that dispose on the conventional pinion shaft is two roller bearings 19 and a deep groove ball bearing 19a (as shown in Figure 2).Two roller bearings 19 are contained in respectively on the axle journal of gear both sides, are used to carry radial load, and its bearing capacity is strong, and deep groove ball bearing 19a is mainly used in the carrying thrust load, to remedy the problem that roller bearing 19 can not bear thrust load.

But, along with marine gearbox constantly to high-power development, bearing specification is increasing, the roller size and the rotary inertia thereof of roller bearing are also increasing, and owing to the lubricant oil in the gear-box can only enter from the both sides of roller bearing, be unfavorable for the sufficient lubrication of bearing, these have all aggravated high-power marine gearbox (particularly pinion shaft is under idling conditions or under the little load condition) in test run and using process, skidding between bearing roller and the raceway is the sliding friction phenomenon, make roller bearing raceway and rolling element the plucking phenomenon generally occur, have a strong impact on the operational safety of high-power marine gearbox.

The model utility content

Technical problem to be solved in the utility model is: the bearing configuration structure that a kind of high-power marine gearbox pinion shaft is provided, it can guarantee to bear radial and axial load, guarantee bearing capacity, can effectively alleviate frequent raceway " plucking " phenomenon that occurs of traditional bearing collocation form again, improve the reliability that bearing and gear-box use.

The technical solution of the utility model is as follows: a kind of bearing configuration structure of high-power marine gearbox pinion shaft, the biserial spheric roller bearing is installed on the axle journal of pinion shaft gear both sides, on the cylindrical of the outer ring of described spheric roller bearing, be provided with annular oil groove, be provided with the radial direction oil hole that runs through described outer ring in described oil groove bottom.

As further design, described biserial spheric roller bearing is two, the described spheric roller bearing that is installed on pinion shaft outside axle head is as fixed bearing, this bearing outer ring is realized axially locating by two back-up rings that are contained on the cabinet exterior bearing hole, two described back-up rings are positioned at the both sides of this bearing outer ring, and bearing inner race then carries out axially locating by the shaft shoulder of pinion shaft and the nut of axle head; The described spheric roller bearing that is installed on the pinion shaft opposite side is as floating support, and its bearing outer ring is bearing in the casing midfeather bearing hole, and its bearing inner race carries out axially locating by the shaft shoulder and the circlip for shaft of pinion shaft.Two bearings, a bearing is a fixed bearing, another bearing is a floating support, as fixed supported bearing outer ring by the back-up ring axial restraint, but as the bearing outer ring play of floating support, with compensation pinion shaft axial thermal expansion.

Further, have oil duct on described cabinet exterior bearing hole and casing midfeather bearing hole, the oil groove on the oil outlet of described oil duct and the described bearing outer ring connects.

The utility model is replaced roller bearing on the pinion shaft and deep groove ball bearing by the biserial spheric roller bearing, the bearing of one end is a fixed bearing, the bearing of the other end is a floating support, wherein as fixed supported bearing, decapacitation is born outside the radial load, can also bear axial load, and as the spheric roller bearing of floating support except that bearing radial load, but bearing outer ring play is with the axial thermal expansion of compensation pinion shaft.Thereby use two spheric roller bearings just can satisfy the requirement of bearing radial and axial load, guarantee bearing capacity.Simultaneously, spheric roller bearing has good aligning performance, and when stressed bending of axle or installation decentraction, but the bearing self-aligning can bear the bigger error that misaligns, and bearing still may normally use; Lubricant oil can enter bearing by oil groove and the oilhole that is provided with on the outer ring, can guarantee effectively, lubricate fully; And, compare with cylindrical roller bearing, satisfying under the condition of equal load, the roller size of biserial spheric roller bearing is littler, can reduce the rotary inertia of roller, little and lubricated fully raceway " plucking " phenomenon that can greatly alleviate the frequent appearance of traditional bearing collocation form of roller rotary inertia, the operational safety of raising bearing and gear-box.

The beneficial effects of the utility model are:

But 1, spheric roller bearing self-aligning can bear the bigger error that misaligns;

2, can enter by outer ring oil groove oilhole owing to lubricant oil, lubricated more abundant, the rotary inertia that adds roller is little, has effectively alleviated the skid plucking phenomenon of bearing at little load and no-load run situation lower roller and raceway, thereby improves the operational safety of bearing and gear-box;

3, use two bearings can satisfy load bearing requirements, assemble more easy.

Description of drawings

Fig. 1 is the basic drive mechanism schematic representation of marine gearbox.

Fig. 2 is the bearing configuration schematic diagram of conventional ship with the gearbox pinion axle.

Fig. 3 is a structural representation of the present utility model.

Fig. 4 is the partial enlarged drawing of Fig. 3.

Embodiment

The utility model is described in further detail below in conjunction with drawings and Examples:

As shown in Figure 3 and Figure 4, a kind of bearing configuration structure of high-power marine gearbox pinion shaft, the gear of pinion shaft 20 roughly is arranged on the middle part of axle, a biserial spheric roller bearing 21 respectively is installed on the axle journal of pinion shaft 20 gear both sides, the model specification of two biserial spheric roller bearings 21 is identical, is bearing in the bearing hole of gear case body by two biserial spheric roller bearings 21.

As shown in Figure 3, the biserial spheric roller bearing of pinion shaft 20 outside axle heads is as fixed bearing, this bearing outer ring is bearing in the cabinet exterior bearing hole 26, be respectively equipped with back-up ring 22 in the both sides of this bearing outer ring, back-up ring 22 is installed in the annular groove of cabinet exterior bearing hole 26, is realized the axially locating of left end shaft bearing outer-ring by these two back-up rings 22; The outboard bearing inner ring then carries out axially locating by the shaft shoulder of pinion shaft 20 and the nut 24 of axle head, the inboard of this bearing inner race is against on the shaft shoulder of pinion shaft 20, and the inner ring outside is fixing by nut 24, between nut 24 and spheric roller bearing 21 inner rings lock washer 25 is housed.The biserial spheric roller bearing that is installed on pinion shaft 20 opposite sides is as floating support, its bearing outer ring is bearing in the casing midfeather bearing hole 27, its bearing inner race carries out axially locating by the shaft shoulder and the circlip for shaft 23 of pinion shaft 20, particularly, the inboard of this bearing inner race is against on the shaft shoulder of pinion shaft 20, and the inner ring outside is fixing by circlip for shaft 23.As fixed supported bearing, decapacitation is born outside the radial load like this, can also bear axial load, and as the spheric roller bearing of floating support except that bearing radial load, but bearing outer ring play, with the axial thermal expansion of compensation pinion shaft 20.

As shown in Figure 3 and Figure 4, be provided with annular oil groove 21a at the outer ring of two biserial spheric roller bearings 21 cylindrical middle part, be provided with the radial direction oil hole 21b that several run through the outer ring in oil groove 21a bottom, on cabinet exterior bearing hole 26 and casing midfeather bearing hole 27, then have oil duct 28, oil groove 21a on the oil outlet of oil duct 28 and the two bearings outer ring connects, lubricant oil can enter bearing by oil groove 21a and oilhole 21b like this, can guarantee effectively, lubricate fully.Because two spheric roller bearings 21 can self-aligning, so can bear the bigger coaxiality error in two bearings hole, satisfying under the condition of equal load, the biserial spheric roller bearing is littler than the roller size of roller bearing, can reduce the rotary inertia of roller, greatly alleviated the skid plucking phenomenon of bearing, thereby improved the operational safety of bearing and gear-box at little load and no-load run situation lower roller and raceway.

Claims

1. the bearing configuration structure of a high-power marine gearbox pinion shaft, it is characterized in that: biserial spheric roller bearing (21) is installed respectively on the axle journal of pinion shaft (20) gear both sides, the bearing of its gear one side is a fixed bearing, and the bearing of gear opposite side is a floating support; On the outer ring cylindrical of described spheric roller bearing (21), be provided with annular oil groove (21a), be provided with the radial direction oil hole (21b) that runs through described outer ring in described oil groove (21a) bottom.

2. the bearing configuration structure of high-power marine gearbox pinion shaft according to claim 1, it is characterized in that: described biserial spheric roller bearing (21) is two, the described spheric roller bearing that is installed on pinion shaft (20) outside axle head is as fixed bearing, this bearing outer ring is realized axially locating by two back-up rings (22) that are contained on the cabinet exterior bearing hole (26), two described back-up rings (22) are positioned at the both sides of this bearing outer ring, and bearing inner race then carries out axially locating by the shaft shoulder of pinion shaft (20) and the nut (24) of axle head; The described spheric roller bearing that is installed on pinion shaft (20) opposite side is as floating support, its bearing outer ring is bearing in the casing midfeather bearing hole (27), and its bearing inner race carries out axially locating by the shaft shoulder and the circlip for shaft (23) of pinion shaft (20).

3. the bearing configuration structure of high-power marine gearbox pinion shaft according to claim 2, it is characterized in that: have oil duct (28) on described cabinet exterior bearing hole (26) and casing midfeather bearing hole (27), the oil groove (21a) on the oil outlet of described oil duct (28) and the two described bearing outer rings connects.