CN212420917U

CN212420917U - Grinding tool for annular thrust bearing

Info

Publication number: CN212420917U
Application number: CN202021297258.XU
Authority: CN
Inventors: 周德贵; 段昌文
Original assignee: Chongqing Jiangjin Shipbuilding Industry Co Ltd
Current assignee: Chongqing Jiangjin Shipbuilding Industry Co Ltd
Priority date: 2020-07-06
Filing date: 2020-07-06
Publication date: 2021-01-29
Anticipated expiration: 2030-07-06

Abstract

The utility model discloses a grinding tool of an annular thrust bearing, which comprises a base, a measuring block and a pressing plate, wherein the measuring block is fixedly arranged on the base, the measuring surface of the measuring block and the assembling and positioning surface at the upper end of the base are positioned in the same plane, and the pressing plate is connected with the base through a screw; the base is fixedly provided with 2 positioning pins, and the measuring block is provided with positioning holes right opposite to the positioning pins; the measuring block is fixedly connected with the base through a bolt; the upper end of the base is coaxially provided with a threaded hole, the pressing plate is provided with a through hole in a penetrating manner opposite to the threaded hole, and the pressing plate is provided with an observation hole in a penetrating manner; the measuring block is a truncated pyramid or a circular truncated cone with a small upper part and a large lower part. The device has the advantages of simple structure, convenience in use and better guaranteed precision.

Description

Grinding tool for annular thrust bearing

Technical Field

The utility model relates to a technical field is made to turbo charger, especially relates to an annular thrust bearing's grinding frock.

Background

The turbine rotor is mostly a core rotating part in machinery and working machinery, and utilizes steam generated by a heat recovery system to push turbine blades to operate through compression so as to do work, and the turbine rotor is the most main rotating part for providing power for the whole supercharger; the supercharger is arranged on the exhaust side of the engine, and the rotating speed of the rotor of the supercharger is very high when the supercharger works, which can reach hundreds of thousands of revolutions per minute.

As shown in the attached figure 1 of the specification, an annular thrust bearing 1 is arranged on a turbine shaft 2 and rotates at a high speed along with the shaft during working, a large end face at the left end is strictly matched with an end face of a plane bearing (a floating disc) to form an accurate oil wedge at a matching part, and the efficient and normal operation of a machine is ensured, but the large end face of the annular thrust bearing has high requirements on flatness and parallelism (both are 0.005mm), the axial positioning dimension is 41.25 +/-0.015 high in accuracy, and the required accuracy and quality are difficult to ensure by using the existing machine tool and tooling equipment.

The existing tool for grinding and fixing the annular thrust bearing 1 is obtained by fixedly connecting a base 3 and a pressure plate 4, wherein the pressure plate 4 is provided with a measuring hole for measuring the axial positioning dimension, when in use, a large circular surface below the base 3 is placed on a working table, the base is firmly absorbed by the magnetic force of the working table of a grinding machine, then the circular surface above the base 3 is ground to be parallel to the working table, then the annular thrust bearing 1 is arranged above the base 3, the pressure plate 4 is tightly pressed by a screw 5, the inner end surface 6 of the annular thrust bearing C is well attached to and coplanar with the circular positioning surface above the base and is parallel to the working table, so that the parallelism and the flatness of 0.005mm are well ensured, meanwhile, in the grinding process, an operator uses a depth micrometer to measure the axial dimension through the hole on the pressure plate, and can not be cleaned due to the falling of the grinding process, therefore, the machining size of 41.25 +/-0.015 mm cannot be accurately measured, and the precision requirement cannot be completely ensured.

SUMMERY OF THE UTILITY MODEL

To the deficiency of the prior art, the technical problem to be solved by the present patent application is: how to provide a simple structure, convenient to use, the better grinding frock of annular thrust bearing who guarantees the precision.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a grinding tool for an annular thrust bearing comprises a base, a measuring block and a pressing plate, wherein the measuring block is fixedly installed on the base, a measuring surface of the measuring block and an assembling and positioning surface at the upper end of the base are located in the same plane, and the pressing plate is connected with the base through a screw; the base is fixedly provided with 2 positioning pins, and the measuring block is provided with positioning holes right opposite to the positioning pins; the measuring block is fixedly connected with the base through a bolt; the upper end of the base is coaxially provided with a threaded hole, the pressing plate is provided with a through hole in a penetrating manner opposite to the threaded hole, and the pressing plate is provided with an observation hole in a penetrating manner; the measuring block is a truncated pyramid or a circular truncated cone with a small upper part and a large lower part.

To sum up, this annular thrust bearing's grinding frock has following beneficial effect: the device has the advantages of simple structure, convenience in use and better guaranteed precision.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.

FIG. 1 is a schematic view of a configuration of an annular thrust bearing and turbine shaft.

Fig. 2 is a schematic structural view of a grinding tool for a prior annular thrust bearing disclosed in the background art.

Fig. 3 is the utility model discloses an assembly structure sketch map of annular thrust bearing's grinding frock and annular thrust bearing.

Fig. 4 is a schematic structural view of the base in fig. 3.

Fig. 5 is a schematic structural view of the press plate of fig. 3.

Fig. 6 is a schematic structural diagram of the measurement block in fig. 3.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. In the present embodiment, the terms "upper", "lower", "left", "right", "front", "rear", "upper end", "lower end", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description, but do not indicate or imply that the designated device or element must have a specific orientation, be constructed in a specific orientation, or be operated, and thus, should not be construed as limiting the present invention.

Referring to fig. 3-6, the grinding tool for the annular thrust bearing 1 comprises a base 3, a measuring block 7 and a pressing plate 4, wherein the measuring block 7 is fixedly installed on the base 3, a measuring surface of the measuring block 7 and an assembling and positioning surface at the upper end of the base 3 are located in the same plane, and the pressing plate 4 is connected with the base 3 through a screw 5; the base 3 is fixedly provided with 2 positioning pins 8, the positioning pins 8 are arranged, and the measuring block 7 is provided with positioning holes 14 opposite to the positioning pins 8, so that the measuring block 7 is convenient to mount; the measuring block 7 is fixedly connected with the base 3 through a bolt 9; the upper end of the base 3 is coaxially provided with a threaded hole 13, the pressing plate 4 is provided with a through hole 11 which is opposite to the threaded hole in a penetrating manner, the pressing plate 4 is provided with an observation hole 12 in a penetrating manner, and the observation hole 12 can be used for ventilation when the pressing plate 4 tightly presses the annular thrust bearing 1, so that the inner end surface 6 of the C is attached to the assembling and positioning surface; the measuring block 7 is a truncated pyramid or a truncated cone with a small upper part and a large lower part.

When the device is used, a large circular surface below the base is placed on a working table, the base is firmly sucked through the magnetic force of the working table of the grinding machine, then the square circular surface above the base is ground to obtain an assembly positioning surface which is parallel to the working table, the annular thrust bearing is arranged above the base, and the annular thrust bearing C is tightly pressed by a screw through a pressing plate, so that the inner end surface of the annular thrust bearing C is well attached to and coplanar with the assembly positioning surface above the base and is parallel to the working table, and therefore the parallelism and the planeness of 0.005mm can be well guaranteed, sand grains on the measuring surface can be cleaned during measurement, the axial size can be measured while grinding, the 41.25 +/-0.015 mm processing size can be accurately measured by measuring the distance between the measuring surface at the upper end of the measuring block and the grinding surface at the upper end of the annular thrust bearing, and the precision requirement is completely.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art; the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the scope of the embodiments of the present invention, and are intended to be covered by the claims and the specification.

Claims

1. The utility model provides an annular thrust bearing's grinding frock, its characterized in that, includes base, measuring block and clamp plate, measuring block fixed mounting be in on the base, the measuring block's measuring surface and the assembly locating surface of base upper end are located the coplanar, the clamp plate passes through the screw and is connected with the base.

2. The annular thrust bearing grinding tool according to claim 1, wherein the base is fixedly provided with 2 positioning pins, and the measuring block is provided with positioning holes opposite to the positioning pins.

3. The annular thrust bearing grinding tool of claim 1, wherein the measuring block is fixedly connected with the base through a bolt.

4. The annular thrust bearing grinding tool according to claim 1, wherein a threaded hole is coaxially formed in the upper end of the base, a through hole is formed in the pressing plate opposite to the threaded hole in a penetrating mode, and an observation hole is formed in the pressing plate in a penetrating mode.

5. The annular thrust bearing grinding tool according to claim 1, wherein the measuring block is a truncated pyramid or a truncated cone with a small top and a large bottom.