CN201301890Y

CN201301890Y - Thrust bearing

Info

Publication number: CN201301890Y
Application number: CNU2008202167555U
Authority: CN
Inventors: 牛国夷; 杨兵; 刘洋
Original assignee: Nanjing High Speed and Accurate Gear Group Co Ltd
Current assignee: Nanjing High Speed and Accurate Gear Group Co Ltd
Priority date: 2008-11-14
Filing date: 2008-11-14
Publication date: 2009-09-02
Anticipated expiration: 2018-11-14

Abstract

The utility model relates to a thrust bearing, which is characterized in that the thrust bearing comprises 6-24 thrust bearing bush groups, each thrust bearing bush group comprises a thrust bearing bush and a supporting pad, the independent thrust bearing bush groups are uniformly distributed on the same annular plane, a supporting block is arranged between the thrust bearing bush and the supporting pad, and the lower end surface of the supporting block is a spherical cambered surface; the radial centerline of each support block lags the geometric centerline of the corresponding thrust bearing pad. The advantages are that: a plurality of groups of thrust bearing bushes and supporting blocks with spherical cambered surfaces are adopted, so that the stress surface of the thrust bearing is uniform; the limit pin effectively controls the radial swing amplitude of the thrust bearing bush; the radial central line of the supporting block lags behind the geometric center of the thrust bearing bush, and the wedge-shaped lubricating oil inlet is favorable for forming an oil film on the surface of the thrust bearing bush to reduce the temperature of a contact surface; the supporting block and the limiting pin can prevent the thrust bearing bush and the supporting pad from deviating in work; a plurality of independent thrust axle bushes can be replaced independently to individual thrust axle bush, reduces cost of maintenance.

Description

Thrust-bearing

Technical field

The utility model relates to a kind of thrust-bearing, the new structure that especially load ratio is big, load is inhomogeneous, use during unbalance loading.

Technical background

Output flange for the vertical gear case, because the technology of machining accuracy and arrangement, the general assurance absolute equilibrium that is difficult to, often need output flange to be supported by can all carrying thrust-bearing, in particular for big load, or loading direction is uncertain, or during unstable state such as load unbalance loading, the supporting effect of all carrying thrust-bearing is particularly important.The support of thrust-bearing is at present generally adopted planar support or is adopted cylindrical body supports, and in the use, the cooling effect of above-mentioned two kinds of thrust-bearings is poor, and the temperature height causes thrust-bearing to be burnt easily, influences the proper functioning of vertical gear case.

The content of invention

The purpose of this utility model is: poor at present employing planar support or the cooling effect that adopts the thrust-bearing of cylindrical body supports to exist, the temperature height, be difficult to form oil film, cause thrust-bearing to be burnt easily, influence the practical problem of the proper functioning of vertical gear case, a kind of new thrust-bearing is provided.

The purpose of this utility model is achieved in that a kind of thrust-bearing, it is characterized in that, comprise 6～24 independently thrust bearing shoe groups, contain corresponding thrust bearing shoe and Support cushion in every group of thrust bearing shoe, the upper surface of thrust bearing shoe is covered with babbit layer, described independently thrust bearing shoe group is evenly distributed on the plane of same annular, is provided with a support block between thrust bearing shoe and the Support cushion, and the lower end surface of support block is a spherical arc; Being subjected to force direction with the level of thrust bearing shoe is reference, geometric center lines 0.008～0.09 radian of the radial centre lines hysteresis respective thrust bearing shell of each support block.

In the utility model: described thrust bearing shoe is circular, and the thrust bearing shoe group that contains circular thrust bearing shoe is evenly distributed on the same anchor ring.

In the utility model: described thrust bearing shoe is a fan shape, and the thrust bearing shoe group splicing that contains the fan shape thrust bearing shoe forms a complete annulus.

In the utility model: support block is a cylindrical body, and its underpart end face is a spherical arc.

In the utility model: the level at thrust-bearing is subjected on the section of force direction, and the babbit layer in every group of thrust bearing shoe group forward position is one section curved surface arc slope, forms the lubricating oil inlet of wedge shape between this curved surface arc slope and the output flange.

In the utility model: described Support cushion is by being bolted on the casing, Support cushion central authorities are provided with the pit consistent with the support block sectional shape, support block embeds the back of thrust bearing shoe, and its lower end places the pit of Support cushion, and the end face spherical arc is against the pit bottom of Support cushion.

In the utility model: the radial centre lines of both sides is provided with position limit pin or position-limited rack inside and outside the support block.

In the utility model: described position limit pin is embedded on the Support cushion, the back side of thrust bearing shoe is provided with the pit corresponding with position limit pin, pit is inserted in the end of position limit pin, and when thrust bearing shoe was in level, there was the gap in the pit hole end corresponding with the thrust bearing shoe back side, the end of position limit pin.

In the utility model: position limit pin is by being bolted on the thrust bearing shoe, and Support cushion is provided with the position-limited rack that contains the hole, and position limit pin inserts in the hole of position-limited rack, when thrust bearing shoe is in level, has the gap between the end of position limit pin and the casing.

In the utility model: the curved surface arc in described babbit layer forward position slope section is a part of intercept in parabola or hyperbola or the oval part curve, the lubricating oil inlet of wedge shape is extended by force direction along the level of thrust bearing shoe, the actual grade of wedge shape is 5～30% of the stressed section length of the level of thrust bearing shoe.

Advantage of the present utility model is: owing to include the independently thrust bearing shoe of multicomponent cloth on same anchor ring in the thrust-bearing, it is the support block of spherical arc that each thrust bearing shoe all has a lower end surface, how no matter the load that is added in above the thrust-bearing by output flange in the work change, thrust bearing shoe all can make the stress surface of thrust-bearing more even along with the load 360 degree scopes swing on the plane that is added in above it; Because when thrust bearing shoe is in level,, there is the gap in the pit hole end corresponding with the thrust bearing shoe back side, end that is embedded in the position limit pin on the Support cushion, or be fixed between position limit pin end on the thrust bearing shoe and the casing and have the gap, can under the prerequisite of guaranteeing thrust bearing shoe swing rationally, control the amplitude that radially wobbles of thrust bearing shoe effectively; Because geometrical center 0.008～0.09 radian of the radial centre lines hysteresis respective thrust bearing shell of each support block, the easy shape of the surface of contact of thrust bearing shoe in service and output flange is p in an angle, and the entry end of thrust-bearing oil is one section curved surface arc slope, make and form one section lubricating oil inlet that forms wedge shape between itself and the output flange, when starting and work, be convenient to the Babbitt surface formation oil film that lubricant oil is immersed in thrust bearing shoe, especially the actual grade of wedge shape be thrust bearing shoe the stressed section length of level 5～30%, greatly reduce the temperature of thrust bearing surface, prolong its working life; Because the Support cushion center is provided with the pit consistent with the support block sectional shape, the support block lower end places the pit of Support cushion, the end face spherical arc is against the pit bottom of Support cushion, and the back side of thrust bearing shoe is provided with the pit corresponding with position limit pin, pit is inserted in the end of position limit pin, the position relative fixed of thrust bearing shoe and Support cushion can be guaranteed, skew can be do not produced at work; Adopt a plurality of independently thrust bearing shoes, can change separately, can reduce maintenance cost for the indivedual thrust bearing shoes that damage.

Description of drawings

Fig. 1 is the thrust bearing shoe component cloth schematic representation that an embodiment of the present utility model relates to;

Fig. 2 be among Fig. 1 A-A to cross-sectional view;

Fig. 3 is the position view of middle support block embodiment illustrated in fig. 1 and Babbitt;

Fig. 4 is the schematic representation that back and output flange formation wedge shape lubricating oil inlet are amplified in the F zone among Fig. 3.

Among the figure: 1, thrust bearing shoe, 2, position limit pin, 3, Support cushion, 4, support block, 5, bolt, 6, position-limited rack, 7, position-limited rack, 8, bolt, 9, casing, 10, output flange, 11, babbit layer.

The radial center of a, support block, the geometrical center of b, thrust bearing shoe, is the angle of thrust-bearing work centre and geometrical center at p, the vertical pressure of F1, thrust bearing shoe, the horizontal tangential power of F2, thrust bearing shoe.

Embodiment

Accompanying drawing discloses an embodiment's of the utility model concrete structure without limitation, and the invention will be further described below in conjunction with accompanying drawing.

By Fig. 1 Fig. 2 in conjunction with Fig. 3 as seen: the utility model comprises 6～24 independently thrust bearing shoe groups, contain corresponding thrust bearing shoe 1 and Support cushion 3 in every group of thrust bearing shoe, the upper surface of thrust bearing shoe 1 is covered with babbit layer, described independently thrust bearing shoe group is evenly distributed on the plane of same annular, be provided with a support block 4 between thrust bearing shoe 1 and the Support cushion 3, the lower end surface of support block 4 is a spherical arc; Being subjected to force direction F2 with the level of thrust bearing shoe is reference, in the annulus that is evenly distributed with thrust bearing shoe 1, and geometric center lines b0.008～0.09 radian of the radial centre lines a hysteresis respective thrust bearing shell of each support block.In the present embodiment, described thrust bearing shoe is a fan shape, and nine groups of thrust bearing shoe group splicings that contain fan shape thrust bearing shoe 1 form a complete annulus; Described support block 4 is a cylindrical body, its underpart end face is a spherical arc, have a hysteresis angle p (referring to Fig. 3) between the geometric center lines b of the radial centre lines a hysteresis respective thrust bearing shell of each support block 3, hysteresis angle p is generally 0.008～0.09 radian; Described Support cushion 3 is fixed on the casing 9 by bolt 8, that Support cushion 3 central authorities are provided with is consistent or bigger with support block 4 sectional shapes, and (general diameter reaches 10～15mm) pit, support block 4 embeds the back of thrust bearing shoe 1, its lower end places the pit of Support cushion 3, and the end face spherical arc is against the pit bottom of Support cushion 3; The radial centre lines of support block 3 inside and outside both sides is provided with position limit pin 2, one of them position limit pin 2 is embedded on the Support cushion 3, the back side of thrust bearing shoe 1 is provided with the pit corresponding with position limit pin 2, pit is inserted in the end of position limit pin 2, when thrust bearing shoe 1 is in level,, there is the gap in the pit hole end corresponding with thrust bearing shoe 1 back side, the end of position limit pin 2, another position limit pin 2 is fixed on the thrust bearing shoe 1 by bolt 5, Support cushion 3 is provided with the position-limited rack 7 that contains the hole, position limit pin 2 inserts in the hole of position-limited rack 7, when thrust bearing shoe 1 is in level, there is the gap between the end of position limit pin 2 and the casing.

By Fig. 4 in conjunction with Fig. 3 as seen, be subjected on the section of force direction in the level of thrust-bearing, the babbit layer 11 in every group of thrust bearing shoe group forward position is one section curved surface arc slope, the lubricating oil inlet of formation wedge shape between this curved surface arc slope and the output flange 10.The lubricating oil inlet of wedge shape is extended by force direction along the level of thrust bearing shoe.

During concrete enforcement, can select 6～24 independently thrust bearing shoe groups according to the diameter of output flange in the described thrust-bearing, the thrust bearing shoe 1 in the thrust bearing shoe group is circular or fan-shaped, and thrust bearing shoe 1 is evenly distributed on the same anchor ring.The curved surface arc in described babbit layer forward position slope section is a part of intercept in parabola or hyperbola or the oval part curve, the lubricating oil inlet of formation wedge shape is extended by force direction between curved surface arc slope and the output flange along the level of thrust bearing shoe, and the actual grade of wedge shape is 5～30% of the stressed section length of the corresponding level of thrust bearing shoe.

Claims

1, a kind of thrust-bearing, it is characterized in that, comprise 6～24 independently thrust bearing shoe groups, contain corresponding thrust bearing shoe and Support cushion in every group of thrust bearing shoe, the upper surface of thrust bearing shoe is covered with babbit layer, described independently thrust bearing shoe group is evenly distributed on the plane of same annular, is provided with a support block between thrust bearing shoe and the Support cushion, and the lower end surface of support block is a spherical arc; Being subjected to force direction with the level of thrust bearing shoe is reference, geometric center lines 0.008～0.09 radian of the radial centre lines hysteresis respective thrust bearing shell of each support block.

2, thrust-bearing according to claim 1 is characterized in that: described thrust bearing shoe is for circular, and the thrust bearing shoe group that contains circular thrust bearing shoe is evenly distributed on the same anchor ring.

3, thrust-bearing according to claim 1 is characterized in that: described thrust bearing shoe is a fan shape, and the thrust bearing shoe group splicing that contains the fan shape thrust bearing shoe forms a complete annulus.

4, thrust-bearing according to claim 1 is characterized in that: support block is a cylindrical body, and its underpart end face is a spherical arc.

5, according to claim 1 or 2 or 3 or 4 described thrust-bearings, it is characterized in that: the level at thrust-bearing is subjected on the section of force direction, the babbit layer in every group of thrust bearing shoe group forward position is one section curved surface arc slope, forms the lubricating oil inlet of wedge shape between this curved surface arc slope and the output flange.

6, thrust-bearing according to claim 5, it is characterized in that: described Support cushion is by being bolted on the casing, Support cushion central authorities are provided with the pit consistent with the support block sectional shape, support block embeds the back of thrust bearing shoe, its lower end places the pit of Support cushion, and the end face spherical arc is against the pit bottom of Support cushion.

7, thrust-bearing according to claim 6 is characterized in that: the radial centre lines of both sides is provided with position limit pin or position-limited rack inside and outside the support block.

8, thrust-bearing according to claim 7, it is characterized in that: described position limit pin is embedded on the Support cushion, the back side of thrust bearing shoe is provided with the pit corresponding with position limit pin, pit is inserted in the end of position limit pin, when thrust bearing shoe was in level,, there was the gap in the pit hole end corresponding with the thrust bearing shoe back side, the end of position limit pin.

9, thrust-bearing according to claim 7, it is characterized in that: position limit pin is by being bolted on the thrust bearing shoe, and Support cushion is provided with the position-limited rack that contains the hole, and position limit pin inserts in the hole of position-limited rack, when thrust bearing shoe is in level, there is the gap between the end of position limit pin and the casing.

10, thrust-bearing according to claim 5, it is characterized in that: the curved surface arc in described babbit layer forward position slope section is a part of intercept in parabola or hyperbola or the oval part curve, the lubricating oil inlet of wedge shape is extended by force direction along the level of thrust bearing shoe, the actual grade of wedge shape is 5～30% of the stressed section length of the level of thrust bearing shoe.