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Split-type high-speed electric spindle dynamometer

A high-speed motorized spindle and dynamometer technology, which is used in power metering, measuring devices, testing of mechanical parts, etc., can solve the problems of limiting the rotation speed of the rotating shaft, unable to test the performance of the motorized spindle, and the power is only 3kW. Effect

Active Publication Date: 2012-08-22
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When this kind of equipment tests the high-speed electric spindle system, the shaft of the dynamometer and the shaft of the motor under test are connected together through a coupling to form a slender multi-point support structure. This structure limits the speed of these shafts (high speed When these rotating shafts constitute a flexible shaft system, the vibration increases), it is impossible to test the performance of the electric spindle at high speed and cannot accurately reflect the actual working state of the spindle motor
The maximum speed of dynamometer products currently on the market is 65,000rpm, but the power is only 3kW, which is difficult to meet the requirements of high-speed and high-power spindle motors

Method used

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  • Split-type high-speed electric spindle dynamometer
  • Split-type high-speed electric spindle dynamometer
  • Split-type high-speed electric spindle dynamometer

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment 2

[0023] Specific embodiment 2, figure 2 It is a structural schematic diagram of the assembled dynamometer 100 and an electric spindle 200 to be tested in the present invention. refer to figure 2 , the electric spindle under test provides support for the rotor assembly of the dynamometer, the dynamometer body does not have a bearing assembly to support the latter, and the rotating shaft part 102 of the rotor assembly can be used as a tool to simulate the actual work of the electric spindle. Spindle motor shaft end tool connection interface The specially made inner hole connector 101 is connected to the electric spindle shaft end through a chuck or threaded connection; the dynamometer provides load application and testing tasks for the electric spindle under test.

[0024] The stator assembly 204 and the rotating shaft 102 of the rotor assembly in the present invention can be arranged in various manners, some of which are described below with examples.

[0025] Embodiments 3,...

specific Embodiment 3

[0026] Specific embodiment 3, in combination Figure 3a , 3b This embodiment is described, and this embodiment shows a composition form of the stator assembly and the rotating shaft. The stator and rotor components are composed of a magnetic ring 204a, a winding 204b, and a magnetically permeable water jacket 204c arranged between the winding 204b and the magnetic ring 204a. The magnetic water jacket of the dynamometer is connected with the winding of the dynamometer through a heat pipe, so that the loss generated in the winding is taken away by the cooling water in the water cooling jacket; the magnetic ring is a circular magnetic steel, and the upper part is the N pole The bottom is the S pole, which is parallel to the magnetic field; the winding of the dynamometer is a motor winding without slots.

[0027] The difference between the stator and rotor structure of this embodiment and the ordinary motor is that the cooling of the ordinary motor generally does not use a water...

specific Embodiment 4

[0029] Specific embodiment 4, in combination Figure 4a , 4b This embodiment is described, and this embodiment shows another form of composition of the stator assembly and the rotating shaft. The stator and rotor assembly is composed of a magnetic ring 204a, a cage bar 204b and a dynamometer stator end ring 204c. The magnetic ring 204a is a circular magnetic steel with parallel magnetization. The stator cage bar 204b is made of copper material and is connected to an electrical circuit through the end ring 204c. Through the magnetic ring 204a, the upper part is the N pole and the lower part is the S pole. The magnetic field induces a current in the cage, and at the same time, the current reacts in the magnetic ring to generate braking torque; the stator cage is embedded in the epoxy water jacket, and the cooling water in the water jacket takes away the heat of the cage.

[0030] This kind of motor structure is different from the general motor in that the stator does not use t...

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Abstract

The invention relates to a split-type high-speed electric spindle dynamometer which is provided for solving the problem of full load test of a high-speed electric spindle in the high-speed operation. The split-type high-speed electric spindle dynamometer comprises a supporting platform, a slide rail, a lifting system, a dynamometer rotor, a dynamometer stator, an inner hole connector and a detection probe. The split-type high-speed electric spindle dynamometer has the beneficial effect that through the load applied by the dynamometer, the working condition of the electric spindle can be completely simulated and the dynamometer is not limited by a rotating shaft system.

Description

technical field [0001] The invention relates to a high-speed electric spindle testing system, in particular to a high-speed and high-power split dynamometer capable of testing the high-speed spindle system. Background technique [0002] With the development of high-speed, high-rigidity, and high-power electric spindle technology, many high-speed, high-power electric spindle systems suitable for CNC turning and milling machine tools have been developed at home and abroad. The speed of these electric spindle systems is mostly 20,000 to 500,000 rpm, and the power is mostly distributed between 1kW and 100kW. Although the technology of high-speed and high-power electric spindle is developing rapidly, the test system of the electric spindle system has not been well resolved. The traditional test method is to use a flexible or rigid coupling to connect the electric spindle under test to the dynamometer, and the braking torque provided by the dynamometer is transmitted to the shaft...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L3/24G01M13/00
Inventor 李立毅曹继伟于吉坤刘家曦
Owner HARBIN INST OF TECH