Thrust bearing segment

Abstract

The utility model relates to mechanical engineering, in particular to segmented thrust plain bearings, and can be used, for example, in the designs of thrust bearings used in rotary machines. The segment (1) of the thrust bearing includes a working surface (1.1) with a protective coating (2) applied to it. The protective coating (2) is made of polyetheretherketone with the addition of graphite and Teflon. The technical result of the utility model is to increase the service life of the thrust bearing segment. 3 clauses, 1 fig.

Description

[0001] Technical field

[0002] The utility model relates to the field of mechanical engineering, in particular to thrust plain bearings with segments, and can be used, for example, in the designs of thrust bearings that are used in rotary machines.

[0003] Technology Level

[0004] A thrust bearing segment is known from the prior art, which includes a working surface (see SU 188229 A1).

[0005] The technical problem inherent in the given analogue is the low service life of the thrust bearing segment.

[0006] This technical problem is caused by the fact that the segment is made without any protective coating.

[0007] The absence of a protective coating on the working surface of the thrust bearing segment reduces its service life.

[0008] The closest analogue is the thrust bearing segment, which includes the working surface (see SU 1467261 A1).

[0009] The technical problem inherent in the given analogue is the low service life of the thrust bearing segment.

[0010] This technical problem is caused by the fact that the segment is made without any protective coating.

[0011] The absence of a protective coating on the working surface of the thrust bearing segment reduces its service life.

[0012] Disclosure of the essence of the utility model

[0013] The technical result of the utility model is to increase the service life of the thrust bearing segment.

[0014] The technical result is achieved by the following design of the thrust bearing segment.

[0015] The thrust bearing segment includes a bearing surface with a protective coating. The segment itself can be made of carbon steel or another steel.

[0016] The protective coating applied to the working surface of the segment is made of polyetheretherketone with the addition of graphite and Teflon.

[0017] Due to the fact that a polyetheretherketone coating is used, namely with the addition of graphite and Teflon, the service life of the thrust bearing segment is increased.

[0018] Increased service life is achieved by the addition of graphite and Teflon, which enhances mechanical strength, wear resistance, hardness, and high-temperature resistance. These properties, taken individually and together, contribute to a longer service life for the thrust bearing segment. Furthermore, the use of polyetheretherketone (PEEK), specifically with the addition of graphite and Teflon, reduces the friction coefficient of the segment's working surface, further contributing to a longer service life.

[0019] In a preferred embodiment, before applying the protective coating, the working surface of the segment is treated to a roughness Ra in the range of 3.2 μm to 6.3 μm. This roughness range is optimal, since with a roughness Ra value of less than 3.2 μm, the adhesion of the protective coating and the working surface of the segment will be poor, which reduces the service life of the thrust bearing segment. Moreover, a working surface roughness Ra value greater than 6.3 μm also contributes to a reduction in the service life of the thrust bearing segment due to the fact that with higher roughness, it is necessary to increase the thickness of the protective coating, which increases the likelihood of crack formation, as well as the porosity of the protective coating.

[0020] Also, in a preferred embodiment of the design, the working surface of the segment is degreased before applying the protective coating, which helps to increase the adhesion of the protective coating, and therefore increase the service life of the thrust segment as a whole.

[0021] In a preferred embodiment of the design, the protective coating is made with a thickness of 0.3 mm to 2 mm.

[0022] The specified range of protective coating thickness is optimal, since test results have shown that when the protective coating thickness is less than 0.3 mm, rapid wear of the coating occurs, which reduces the service life of the thrust bearing segment, and when the protective coating thickness is greater than 2 mm, the likelihood of cracks in the coating during operation increases, which also reduces the service life of the thrust bearing segment.

[0023] The protective coating can be applied to the working surface of the segment, for example, by plasma spraying (or some other method).

[0024] After applying a protective coating to the working surface, the segment is used as part of a thrust bearing.

[0025] All of the above design features, both individually and together, contribute to increasing the service life of the thrust bearing segment and achieving the stated technical result.

[0026] Brief description of drawings

[0027] The utility model is illustrated by a drawing, where the figure shows a general view of a thrust bearing segment.

[0028] The following structural elements of the thrust bearing segment are indicated by the positions in the illustration:

[0029] pos. 1 - thrust bearing segment;

[0030] pos. 1.1 - working surface of the thrust bearing;

[0031] pos. 2 - protective coating.

[0032] Implementation of a utility model

[0033] The utility model is implemented as follows.

[0034] Segment 1 of the thrust bearing includes a working surface 1.1 with a protective coating 2 applied.

[0035] Protective coating 2 is made of polyetheretherketone with the addition of graphite and Teflon.

[0036] Protective coating 2 is applied as follows.

[0037] A layer of polyetheretherketone with the addition of graphite and Teflon (0.3 to 2 mm thick) is applied to the working surface 1.1 of segment 1, which has been pre-treated to a roughness of Ra in the range from 3.2 μm to 6.3 μm and degreased, made, for example, from carbon steel, by plasma spraying (or some other method).

[0038] The resulting protective surface 2 is then ground to a roughness of Ra in the range of 0.4 μm to 0.8 μm and subjected to heat treatment for crystallization.

[0039] The resulting segment with a protective coating is then used as part of a thrust bearing, which is installed, for example, in a rotary machine.

[0040] The utility model can be used in the design and manufacture of thrust bearing segments.

Claims

1. A thrust bearing segment comprising a working surface with a protective coating applied, characterized in that the protective coating is made of polyetheretherketone with the addition of graphite and Teflon.

2. A thrust bearing segment according to paragraph 1, characterized in that the thickness of the protective coating is in the range from 0.3 mm to 2 mm.

3. A thrust bearing segment according to paragraph 1, characterized in that the working surface of the segment is processed before applying the coating to a roughness value Ra in the range from 3.2 μm to 6.3 μm.

4. A thrust bearing segment according to claim 1, characterized in that the protective coating, after application, is processed to a roughness value Ra in the range from 0.4 μm to 0.8 μm and is subjected to heat treatment.

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