A device capable of remotely controlling and measuring electrical parameters of a rotor

Abstract

The present invention provides a device capable of remotely controlling and measuring the electrical parameters of a rotor, comprising: a spring brush, a brush holder, an electromagnet, and a remote wiring terminal, wherein the spring brush and the electromagnet are respectively connected to the remote wiring terminal and energized through the remote wiring terminal; the electromagnet is arranged at the lower part of the spring brush, and the spring brush is arranged on the brush holder, and the contact and separation between the spring brush and the rotating element are controlled by the electromagnet. The measuring device of the present invention utilizes the action of the electromagnet to control the spring brush, and can realize on-demand measurement and remote control; by designing a double-layer spring sheet structure, the position and clamping force of the spring brush can be adjusted as needed, ensuring that the brush is in reliable contact without excessive clamping force, thereby effectively extending the service life of the brush.

Description

Technical Field

[0001] The present invention relates to the field of motor control, and in particular to a device capable of remotely controlling and measuring electrical parameters of a rotor. Background Art

[0002] The generator adopts a self-excited brushless excitation system, in which the rotor insulation detection method is to make the brush contact the slip ring shaft through an electromagnet for measurement. In the actual operation of many nuclear power units in China, the exciter with this structure often has faults such as the rotor grounding detection carbon brush being stuck and poor contact, resulting in false alarms of the generator rotor grounding, which seriously affects the safe and stable operation of the unit.

[0003] The measurement of electrical parameters of rotating elements is widely used in rotating machinery such as synchronous motors and brushless exciters. There are usually two methods. One is to use a fixed brush method. The brush is in contact with the rotating part for a long time. This method will greatly increase the wear rate of the brush and the brush needs to be replaced frequently. The other method is to manually control the brush contact method on site. When measurement is required, the contact between the brush and the rotating part is controlled by a manual device. This method can reduce the brush wear rate, but since it requires manual control on site, it is not conducive to remote measurement and is very inconvenient. Summary of the invention

[0004] In view of the problems existing in the prior art, a device for remotely controlling and measuring the electrical parameters of a rotating element is provided, through which the rotating element can be remotely measured.

[0005] The technical solution adopted by the present invention is as follows: a device capable of remotely controlling and measuring the electrical parameters of a rotating element, comprising: a spring brush, a brush holder, an electromagnet, and a remote wiring terminal, wherein the spring brush and the electromagnet are respectively connected to the remote wiring terminal and energized through the remote wiring terminal; the electromagnet is arranged at the lower part of the spring brush, and the spring brush is arranged on the brush holder, and the contact and separation between the spring brush and the rotating element are controlled by the support block of the electromagnet.

[0006] Furthermore, the spring brush comprises a spring frame, a spring sheet and a brush, one end of the spring sheet is fixed on the spring frame, the brush is fixed on the other end of the spring sheet, and the spring brush is fixed on the brush frame through the spring frame.

[0007] Furthermore, the spring sheet adopts a double-layer spring sheet, wherein an upper spring sheet and a lower spring sheet are both fixed to the spring frame, the upper spring sheet and the lower spring sheet are fixed by a spacer block, and the brush is arranged on the upper spring sheet.

[0008] Furthermore, the end of the lower spring sheet that is not fixed to the spring frame is in a hook shape and is bent downward to contact the electromagnet support block.

[0009] Furthermore, the spacer block is a sliding spacer block, and the interval between the upper and lower spring sheets is adjusted by sliding the spacer block left and right.

[0010] Furthermore, the device includes two identical spring brushes, the brush holder is a U-shaped brush holder, the two spring brushes are respectively fixed on the left and right sides inside the brush holder, and the electromagnet simultaneously controls the contact and separation of the two spring brushes with the rotating element.

[0011] Compared with the prior art, the beneficial effects of adopting the above technical solution are:

[0012] 1. Using the action of the electromagnet to control the spring brush can achieve on-demand measurement and remote control;

[0013] 2. The double-layer spring sheet structure design can adjust the position and clamping force of the spring brush as needed, ensuring that the brush has reliable contact without excessive clamping force, thereby effectively extending the service life of the brush. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the measuring device in the present invention.

[0015] Figure 2 It is a schematic diagram of the spring brush structure in the measuring device of the present invention.

[0016] Figure numerals: 1-spring brush, 2-brush holder, 3-electromagnet, 4-remote terminal, 5-spring holder, 6-brush, 7-upper spring sheet, 8-spring spacer, 9-lower spring sheet. DETAILED DESCRIPTION

[0017] The present invention is further described below in conjunction with the accompanying drawings.

[0018] like Figure 1 As shown, the present invention provides a device capable of remotely controlling and measuring the electrical parameters of a rotating element, so as to solve the problem that the brush has a high wear rate and needs manual control on site in the prior art. The specific scheme is as follows: it includes a spring brush 1, a brush holder 2, an electromagnet 3, and a remote wiring terminal 4. The spring brush 1 and the electromagnet 3 are respectively connected to the remote wiring terminal 4, and are energized through the remote wiring terminal 4; the electromagnet 3 is arranged at the lower part of the spring brush 1, and the spring brush 1 is arranged on the brush holder 2. The spring brush is lifted by the support block of the electromagnet 3 to control the contact and separation between the spring brush 1 and the rotating element. The support block is arranged at the upper part of the electromagnet, and the electromagnet lifts the support block when power is turned on.

[0019] In a preferred embodiment, the spring brush 1 includes a spring frame 5, a spring sheet and a brush 6, one end of the spring sheet is fixed on the spring frame 5, and the brush 6 is fixed on the other end of the spring sheet. The spring brush 1 is fixed on the brush frame 2 through the spring frame 5.

[0020] In a preferred embodiment, the spring sheet is a double-layer spring sheet, which includes an upper spring sheet 7 and a lower spring sheet 9 , both of which are fixed to the spring frame. The upper spring sheet 7 and the lower spring sheet 9 are fixed by a spacer block 8 , and the brush 6 is arranged on the upper spring sheet 7 .

[0021] In a preferred embodiment, the end of the lower spring sheet 9 that is not fixed to the spring frame 5 is in a hook shape and is bent downward for contacting the electromagnet 3 .

[0022] In a preferred embodiment, the spacer block 8 is a sliding spacer block, and the interval between the upper and lower spring sheets is adjusted by sliding the spacer block left and right.

[0023] In a preferred embodiment, the device includes two identical spring brushes, the brush holder 2 is a U-shaped brush holder, the two spring brushes are respectively fixed on the left and right sides inside the brush holder, and the electromagnet simultaneously controls the contact and separation of the two spring brushes with the rotating element.

[0024] The measuring device provided by the present invention can remotely control the contact and separation between the brush and the rotating element according to demand, thereby avoiding long-term contact between the brush and the rotating element and increasing losses.

[0025] The specific working process is: in the non-powered state, the brush does not contact the rotating element. When the parameters need to be measured, the electromagnet is energized to lift the spring brush through the support block, so that the brush contacts the rotating element.

[0026] The measuring terminal and the electromagnet control terminal are integrated on the remote terminal block for easy wiring. Since the electromagnet thrust is large, if it acts directly on the brush, on the one hand, it will increase the wear of the brush; on the other hand, excessive clamping force will cause the brush to heat up severely, thereby damaging the brush. Therefore, this device is designed with a double-layer spring sheet structure. The upper spring sheet is used to hold up the brush, and the lower spring sheet is used to contact the electromagnet support block. At the same time, an adjustment spacer block is designed between the upper and lower spring sheets. During actual assembly, the height of the brush can be adjusted by changing the position of the spacer block, ensuring that the brush can effectively contact the measured component during operation and avoid damage to the brush due to excessive clamping force.

[0027] Compared with the prior art, the measuring device of the present invention has the following technical advantages:

[0028] 1. Using the action of the electromagnet to control the spring brush can achieve on-demand measurement and remote control;

[0029] 2. The double-layer spring sheet structure design can adjust the position and clamping force of the spring brush as needed, ensuring that the brush has reliable contact without excessive clamping force, thereby effectively extending the service life of the brush.

[0030] The present invention is not limited to the above-mentioned specific embodiments. The present invention extends to any new features or any new combination disclosed in this specification, as well as any new method or process steps or any new combination disclosed. If non-substantial changes or improvements made by those skilled in the art without departing from the spirit of the present invention should fall within the scope of protection of the claims of the present invention.

[0031] All features disclosed in this specification, or steps in all methods or processes disclosed, except mutually exclusive features and / or steps, can be combined in any manner.

[0032] Any feature disclosed in this specification, unless otherwise stated, can be replaced by other equivalent or alternative features with similar purposes. That is, unless otherwise stated, each feature is only an example of a series of equivalent or similar features.

Claims

1. A device capable of remotely controlling and measuring rotor electrical parameters, characterized in that: include: Spring brush, brush holder, electromagnet, remote wiring terminal, the spring brush and electromagnet are respectively connected to the remote wiring terminal, and are energized through the remote wiring terminal; the electromagnet is arranged at the lower part of the spring brush, the spring brush is arranged on the brush holder, and the contact and separation of the spring brush and the rotating element are controlled by the support block of the electromagnet; The spring brush comprises a spring frame, a spring sheet and a brush, one end of the spring sheet is fixed on the spring frame, the brush is fixed on the other end of the spring sheet, and the spring brush is fixed on the brush frame through the spring frame; The spring sheet adopts a double-layer spring sheet, which includes an upper spring sheet and a lower spring sheet, both of which are fixed to the spring frame, and the upper spring sheet and the lower spring sheet are fixed by a spacer block, and the brush is arranged on the upper spring sheet; The end of the lower spring sheet that is not fixed to the spring frame is in the shape of a hook, and the hook is bent downward as a whole to contact the electromagnet support block; The spacer block is a sliding spacer block, and the interval between the upper and lower spring sheets is adjusted by sliding the spacer block left and right; The device comprises two identical spring brushes, the brush holder is a U-shaped brush holder, the two spring brushes are respectively fixed on the left and right sides inside the brush holder, and the electromagnet simultaneously controls the contact and separation of the two spring brushes with the rotating element.

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