CN103671546A - Thrust sliding bearing with damping structure - Google Patents

Abstract

The invention discloses a thrust sliding bearing with a damping structure. The thrust sliding bearing comprises a bearing watts seat, at least three fan-shaped tiles, and supporting balls and screws which have the same number with that of the fan-shaped tiles, wherein a group of radial grooves, which are in uniform distribution along the central axis of the sliding bearing, are formed in the bottom surface of the bearing watts seat so as to form the bearing watts seat with the damping structure; the symmetry plane of each radial groove formed in the bottom surface of the bearing watts seat is overlapped with that of each fan-shaped tile which is corresponding to each radial groove; each groove formed in the bottom surface of the bearing watts seat is a radial groove which penetrates through the inner diameter and outer diameter of the bearing watts seat along the bearing watts seat, or a radial groove which does not penetrate through the inner diameter and outer diameter of the bearing watts seat along the bearing watts seat; the grooves of the bottom surface of the bearing watts seat are only formed in the inner edge part and outer edge part of the bottom surface of the bearing watts seat and not formed in the central diameter of the bearing watts seat. By adopting the structure disclosed by the invention, the internal stress of a bearing watts seat basal body is in uniform distribution, the damping performance of the bearing watts seat is improved, the longitudinal vibration of a thrust shaft system is effectively controlled, the noise of the shaft system is reduced and the service life of the thrust sliding bearing is prolonged.

Description

Thrust slide bearing with damping structure

Technical field

The present invention relates to a kind of sliding bearing, especially relate to a kind of thrust slide bearing with damping structure.

Background technique

Thrust slide bearing is a kind of important supporting element, in the heavy mechanical equipments such as machinery, power station, iron and steel and chemical industry, is widely used.Thrust slide bearing is as critical component wherein, and main bearing axial pushing force is directly connected to the service behaviour of machine.

Along with the developing rapidly of modern industry, the operation of a machine speed and load improve day by day, and the service behaviour of thrust slide bearing is had higher requirement in recent years.On the other hand, thrust slide bearing is often used as the axially support of axle system, and the extensional vibration of axle system is produced to strong coupling.For example, in boats and ships, the Propulsion Systems extensional vibration that large-sized power plant noise and propeller cavitation pulsating force cause is delivered to hull through thrust-bearing, causes hull judder, and follows higher mechanical noise.Therefore must adopt effective technology means to control noise and vibration.In engineering, an effective way of damping noise reduction is to adopt high damping material.Appropriate design damping structure on bearing liner seat, strengthens the damping capacity of bearing liner seat matrix artificially, can effectively reduce noise and reduce vibration.

The surface elasticity distortion of bearing liner seat, can calculate with Boussinesq formula (1).The surface heat distortion of bearing shell, available formula (2) calculates.

$d(x,y)=\frac{2}{{\mathrm{\πE}}^{\′}}\underset{\mathrm{\Ω}}{\∫\∫}\frac{p(s,t)\mathrm{dsdt}}{\sqrt{{(x-s)}^2+{(y-t)}^2}}---\left(1\right)$

In formula (1), wherein, e ₁, E ₂young's modulus for axle, tile fragment; υ ₁, υ ₂poisson's ratio for axle, tile fragment material; P is hydrodynamic pressure.

Tiling thermal distortion can use formula (2) to calculate

$u\left(R_{\mathrm{sext}}\right)=\frac{2{\mathrm{\α}}_h{R}_{\mathrm{sext}}}{(R_{\mathrm{sext}}^2-R_{\sin t}^2)}{\∫}_{R_{\sin t}}^{R_{\mathrm{sext}}}(T_s\left(r\right)-T_{\mathrm{ref}})\mathrm{rdr}---\left(2\right)$

In formula (2): α _h-thermal expansion coefficient; R _sext-bearing shell outer surface height; R _sint-inner surface of bearing bush height; T _s(r)-bearing shell cross section temperature; T _ref-ambient temperature.

Summary of the invention

The object of the present invention is to provide a kind of thrust slide bearing with damping structure, in bearing liner seat bottom surface, be provided with one group around the radially equally distributed groove of sliding bearing central axis.

The technical solution used in the present invention is:

The present invention includes bearing liner seat, three above fan-shaped tile fragments, with fulcrum ball and the screw of fan-shaped tile fragment same number; Described bearing liner seat is in bottom surface, to be provided with one group around the equally distributed radial groove of sliding bearing central axis, forms the bearing liner seat with damping structure.

The symmetry plane of described every the radial groove in bearing liner seat bottom surface with damping structure overlaps with the symmetry plane of fan-shaped tile fragment separately.

The shape of cross section of the described bearing liner seat bottom grooves with damping structure is rectangle, trapezoidal, triangle, ladder-type, semicircle or parabola shaped.

Described every of bottom surface of the bearing liner seat groove with damping structure is along the bearing liner seat internal diameter with damping structure to external diameter, to be the radial groove connecting; Or along the bearing liner seat internal diameter with damping structure to external diameter, be the radial groove not connecting, the bearing liner seat bottom grooves with damping structure is only arranged at bearing liner seat bottom surface inner edge and the peripheral edge portion with damping structure, and is not provided with groove with the bearing liner seat central diameter place of damping structure.

The described bearing liner seat with damping structure is the radial groove that do not connect from inside to outside, at the sectional shape of its radial symmetric groove, is rectangle, right-angled triangle, right-angled trapezium or circular arc.

The beneficial effect that the present invention has is:

1, the groove of bearing liner seat of the present invention bottom surface plays damping function, by the deformation of bearing liner seat bottom grooves part material, reach the effect of buffering absorbing, strengthen the damping capacity of bearing liner seat, thereby effectively control Propulsion Systems extensional vibration, reduced the noise of axle system, the working life of having improved thrust slide bearing.

2, the groove of bearing liner seat of the present invention bottom surface makes the contact stiffness that is provided with trench portions be less than the contact stiffness of not establishing trench portions.Therefore, when thrust slide bearing is subject to responsive to axial force, the material that is provided with trench portions is easily out of shape, thereby makes bearing liner seat stress distribution even, the working life of having improved thrust slide bearing.

3, groove is even, symmetrical in the distribution of the bearing liner seat bottom surface with damping structure, so the damping function that groove rose also has symmetry properties, and the homogenization that contributes to bearing liner seat matrix internal stress to distribute.

What 4, for the bearing liner seat bottom surface with damping structure, be provided with does not connect groove, when utilizing groove structure to strengthen bearing liner seat matrix damping capacity, has effectively improved the stress concentration phenomenon of bearing liner seat edge.And place still retains body material due to bearing liner seat central diameter, this part matrix has played the effect of stiffening rib, has improved the intensity of bearing liner seat.

5, simple with the shape of cross section of the set groove in bearing liner seat bottom surface of damping structure, the symmetry that is evenly distributed, makes easy to processly, and has to a certain degree alleviated bearing liner seat weight.

Accompanying drawing explanation

Fig. 1 is plan view of the present invention.

Fig. 2 is the A-A sectional view of Fig. 1.

Fig. 3 is that trench cross-section is trapezoidal sliding bearing figure.

Fig. 4 is that trench cross-section is leg-of-mutton sliding bearing figure.

Fig. 5 is that trench cross-section is the sliding bearing figure of ladder-type.

Fig. 6 is that trench cross-section is semicircular sliding bearing figure.

Fig. 7 is that trench cross-section is parabola shaped sliding bearing figure.

Fig. 8 does not connect the sliding bearing plan view that trench cross section is shaped as rectangle.

Fig. 9 is the A-A sectional view of Fig. 8.

Figure 10 does not connect the sliding bearing plan view that trench cross section is shaped as right-angled triangle.

Figure 11 is the A-A sectional view of Figure 10.

Figure 12 does not connect the sliding bearing plan view that trench cross section is shaped as right-angled trapezium.

Figure 13 is the A-A sectional view of Figure 12.

Figure 14 does not connect the sliding bearing plan view that trench cross section is shaped as circular arc.

Figure 15 is the A-A sectional view of Figure 14.

In figure: 1, fan-shaped tile fragment, 2, screw, 3, fulcrum ball, 4, with the bearing liner seat of damping structure.

Embodiment

Below in conjunction with drawings and Examples, the present invention is further illustrated.

As shown in Figure 1 and Figure 2, the present invention includes bearing liner seat, eight fan-shaped tile fragments 1, with fulcrum ball 3 and the screw 2 of fan-shaped tile fragment same number; Eight fan-shaped tile fragments 1, along same circle distribution, have groove in the middle of every fan-shaped tile fragment 1 both sides, and screw 2 is connected to casing by a thrust slide bearing watt seat, is in turn connected into bearing integral.Described bearing liner seat is to be provided with one group around the equally distributed radial groove of sliding bearing central axis in bearing liner seat bottom surface, forms the bearing liner seat 4 with damping structure.

As shown in Figure 1 and Figure 2, the symmetry plane of described bearing liner seat 4 every the radial grooves in bottom surface with damping structure overlaps with the symmetry plane of fan-shaped tile fragment separately.

As shown in Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7, the shape of cross section of described bearing liner seat 4 bottom grooves with damping structure is respectively rectangle, trapezoidal, triangle, ladder-type, semicircle or parabola shaped.

As shown in Figure 1 and Figure 2, described every of 4 bottom surface of the bearing liner seat groove with damping structure is along bearing liner seat 4 internal diameters with damping structure to external diameter, to be the radial groove connecting; As shown in Fig. 8～Figure 15, or along bearing liner seat 4 internal diameters with damping structure to external diameter, be the radial groove not connecting, bearing liner seat 4 bottom grooves with damping structure are only arranged at bearing liner seat 4 bottom surface inner edge and the peripheral edge portions with damping structure, and are not provided with groove with the bearing liner seat 4 central diameter places of damping structure.

As shown in Fig. 9, Figure 11, Figure 13, Figure 15, the described bearing liner seat 4 with damping structure is the radial groove that do not connect from inside to outside, at the sectional shape of its radial symmetric groove, is rectangle, right-angled triangle, right-angled trapezium or circular arc.

When thrust slide bearing is subject to responsive to axial force, the contact stiffness that has trench portions on bearing liner seat 4 bottom surfaces with damping structure is far smaller than the not contact stiffness of open channels part.Each side of groove will produce deflection, compression and tensile buckling, play damping function.The damping structure of this bearing liner seat bottom surface, makes the stress distribution in bearing liner seat even on the one hand, can cushion absorbing on the other hand, thereby effectively control Propulsion Systems extensional vibration, has reduced the noise of axle system, the working life of having improved thrust slide bearing.In addition, groove is even, symmetrical in the distribution of bearing liner seat 4 bottom surfaces with damping structure, and the damping function being risen also has symmetry properties, the homogenization that contributes to bearing liner seat matrix internal stress to distribute.

The shape of cross section of the described bearing liner seat bottom grooves with damping structure can be made as rectangle, trapezoidal, triangle, as shown in Figure 2, Figure 3, Figure 4.The damping of groove is directly proportional to the degree of depth of groove, and the degree of depth is larger, and its damping is better.But if the degree of depth of groove is excessive, can cause bearing support intensity to decline.For this reason, select to adopt the groove that shape of cross section is ladder-type, as shown in Figure 5.Cross section be the groove of ladder-type both made groove reach must depth requirements, strengthened the damping capacity of bearing liner seat matrix; Be unlikely to again to make bearing liner seat intensity to decline excessive, guaranteed the requirement of strength of bearing liner seat matrix.Can also select to adopt shape of cross section is semicircle or parabola shaped groove, as shown in Figure 6, Figure 7.Cross section has been avoided the stress concentration phenomenon causing because of the abrupt change of cross-section for semicircle or parabola shaped groove, the groove of described shape of cross section before, and the stress distribution in bearing liner seat matrix is more even.

In addition, can also, by changing the quantity of width, the degree of depth and the groove of groove, strengthen the damping of groove.

Described bearing liner seat 4 bottom surfaces with damping structure are provided with does not connect groove, as shown in Figure 8.With the groove of bearing liner seat 4 bottom surfaces of damping structure, be only located at bearing liner seat bottom surface inner edge and peripheral edge portion and bearing liner seat central diameter place is not provided with groove.This form damping structure, when utilizing groove structure to strengthen bearing liner seat matrix damping capacity, has effectively improved the stress concentration phenomenon of bearing liner seat edge.And place still retains body material due to bearing liner seat central diameter, this part matrix has played the effect of stiffening rib, has improved the intensity of bearing liner seat.

Above-mentioned embodiment is used for the present invention that explains, rather than limits the invention, and in the protection domain of spirit of the present invention and claim, any modification and change that the present invention is made, all fall into protection scope of the present invention.

Claims (5)

1. with a thrust slide bearing for damping structure, comprise bearing liner seat, three above fan-shaped tile fragments, with fulcrum ball and the screw of fan-shaped tile fragment same number; It is characterized in that: described bearing liner seat is in bottom surface, to be provided with one group around the equally distributed radial groove of sliding bearing central axis, form the bearing liner seat with damping structure.

2. a kind of thrust slide bearing with damping structure according to claim 1, is characterized in that: the symmetry plane of described every the radial groove in bearing liner seat bottom surface with damping structure overlaps with the symmetry plane of fan-shaped tile fragment separately.

3. a kind of thrust slide bearing with damping structure according to claim 1, is characterized in that: the shape of cross section of the described bearing liner seat bottom grooves with damping structure is rectangle, trapezoidal, triangle, ladder-type, semicircle or parabola shaped.

4. a kind of thrust slide bearing with damping structure according to claim 1, is characterized in that: described every of bottom surface of the bearing liner seat groove with damping structure is along the bearing liner seat internal diameter with damping structure to external diameter, to be the radial groove connecting; Or along the bearing liner seat internal diameter with damping structure to external diameter, be the radial groove not connecting, the bearing liner seat bottom grooves with damping structure is only arranged at bearing liner seat bottom surface inner edge and the peripheral edge portion with damping structure, and is not provided with groove with the bearing liner seat central diameter place of damping structure.

5. a kind of thrust slide bearing with damping structure according to claim 4, it is characterized in that: the described bearing liner seat with damping structure is the radial groove that do not connect from inside to outside, is rectangle, right-angled triangle, right-angled trapezium or circular arc at the sectional shape of its radial symmetric groove.

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