Test platform and method of nonparallelism of space ring on coupling influence rule of main shaft thermal structure

A technology for testing platform and parallelism, which is applied in the field of machinery, can solve problems such as poor parallelism of the end face of the spacer, preload force, bearing running performance, influence of heat generated by contact load, lack of influence of bearing performance on the geometric accuracy of the end face of the spacer, etc., to achieve The effect of simple structure and clear test principle

Inactive Publication Date: 2019-08-16
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The poor parallelism of the end face of the spacer will produce non-uniform preload, which will cause the bearing to run tilted, which will have a certain impact on the running performance, contact load and heat generation of the bearing.
At present, there is relatively little research on the influence of the geometric accuracy of the end face of the spacer on the performance of the bearing.

Method used

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  • Test platform and method of nonparallelism of space ring on coupling influence rule of main shaft thermal structure
  • Test platform and method of nonparallelism of space ring on coupling influence rule of main shaft thermal structure
  • Test platform and method of nonparallelism of space ring on coupling influence rule of main shaft thermal structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] In Example 1, a fixed rotational speed was set, and five spacers with different parallelisms were used for comparative tests. Table 1 shows the spacers and spindle speeds used.

[0044] Table 1 Example 1 spacer and tachometer

[0045]

[0046] The temperature of the spacer ring changes with time as shown in the figure Figure 5 As shown, the thermal elongation of the main shaft 2 in the three directions of X, Y and Z is as follows Image 6 , 7 , 8 shown.

Embodiment 2

[0048] Example 2 The temperature rise characteristics of the spindle at different rotational speeds (1000-8000 rpm) were measured, and it was operated continuously. The display screen of the industrial computer records the temperature rising trend of each measurement point in real time, and records the temperature value every 2s until the shaft system reaches thermal equilibrium at this speed, and then increases the speed to continue the operation measurement.

[0049] Under the condition of variable speed, the set spacer non-parallelism error and speed are shown in Table 2.

[0050] Table 2 Example 2 Spacer and tachometer

[0051]

[0052] Under the condition of variable speed, the temperature of the spacer ring with a single parallelism error changes with time as follows: Figure 9 shown.

[0053] Under the condition of variable speed, the thermal elongation of the spindle is as follows Figure 10 shown.

[0054] according to Figure 6-8 and Figure 10 Analysis show...

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Abstract

The invention discloses a test platform and method of nonparallelism of a space ring on coupling influence rule of a main shaft thermal structure. A main shaft is arranged in an outer shell, fixing ofthe main shaft in the outer shell is achieved by a front support piece and a rear support piece, the main shaft is provided with a front displacement sensor group and a rear displacement sensor grouprelative to an extension segment of the outer shell, and a front temperature sensor and a rear temperature sensor are arranged on surfaces of the front support piece and the rear support piece. The test platform has the advantages the working condition of a high-speed main shaft is truly simulated, the thermal deformation change of the space ring having a parallelism error on the main shaft, thetemperature rising of a main shaft system and heat generation data of a bearing can be truly reflected, the influence of the parallelism error of the space ring on the main shaft deformation, the temperature rising of the main shaft system and the temperature change of the bearing is simulated by a test method under conditions of fixed rotational speed and variable rotational speed, and an important theoretical support effect is achieved for analysis of bearing rigidity change.

Description

technical field [0001] The present invention relates to the field of machinery, in particular to a test platform and method for the law of influence of spacer ring non-parallelism on the thermal structure coupling of the main shaft Background technique [0002] High-speed spindles include rotating components such as rotors, motors, bearings and spacers. Bearings are key components of high-speed rotating spindles, and their performance directly affects the rotation accuracy, service life and reliability of machine tool spindles. Bearing service performance is not only affected by factors such as its own manufacturing accuracy, preload, and lubrication state, but also related to the mating and contact state of surrounding components, which has attracted the attention of the industry and researchers. The spacer plays the role of directly axially fixing the bearing, and is one of the important parts around it, and its manufacturing error will directly lead to poor working condit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M13/04
CPCG01M13/04
Inventor 马驰刘佳兰王时龙
Owner CHONGQING UNIV
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