Shaft voltage detection device

Abstract

The utility model relates to the technical field of detection equipment, in particular to a shaft voltage detection device which comprises a base, a vertical rod is arranged on the base, a ram is hinged to the upper end of the vertical rod, a carbon brush is detachably connected to the ram through a fixing clamp, and the carbon brush is connected with a data collector through a wire. One end of the first spring is connected to the vertical rod, and the other end of the first spring is connected to the ram; the fixing clamp comprises a first connecting part of a C-shaped structure, second connecting parts extending outwards are arranged at the two ends of the first connecting part respectively, the fixing clamp is fixed to the ram in a bolting mode through the two second connecting parts, and the carbon brush is placed in a groove of the first connecting part and locked and fixed through a first locking bolt and a first locking nut. According to the device, manual handheld measurement is replaced, and the twisting injury risk caused by a high-speed rotating shaft is avoided; the pressure between the carbon brush and the shaft is kept balanced during measurement through the elastic force of the first spring, the carbon brush is always in stable contact with the surface of the shaft during measurement, and measurement fluctuation is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to detection equipment technical field, and specifically is a kind of shaft voltage detection device. BACKGROUND

[0002] In the process of device operation, voltage can be generated on the shaft of generator, when the shaft voltage is enough to break through the oil film between shaft and bearing, discharge phenomenon will occur, make the oil for lubrication and cooling deteriorate, serious time can lead to bush burn out, forced shutdown, cause accident, therefore, it is necessary to check and measure the voltage between the shaft and bearing of generator set.

[0003] At present, when dynamic test is carried out on site, there are two shaft voltage detection methods, the first, directly measure by detection personnel hand-held multimeter pen, but due to the rotor is in high-speed running state, this method is prone to entanglement danger;The second, detection personnel measure by hand-held carbon brush test rod made by copper cloth winding, due to the rotor is in high-speed running state, if the holding personnel of hand-held carbon brush uses force angle is not good or due to long time test leads to unbalanced force, it will lead to detection waveform to appear big deviation;When force is too large, even carbon brush top spark situation appears, when shaft current passes through the metal contact point of bearing and rotating shaft, the high temperature generated instantaneously can lead to local burning of bearing and bush, serious time can make the whole bearing damage. UTILITY MODEL CONTENTS

[0004] In view of the deficiencies of prior art, the utility model aims at providing a kind of shaft voltage detection device without hand-held multimeter pen or hand-held carbon brush test rod, guarantee the pressure balance between carbon brush and shaft in detection process.

[0005] The utility model solves the technical scheme that the utility model employs for its technical problems:

[0006] A kind of shaft voltage detection device, including base, base is provided with stand, hinged on the upper end of stand and has cantilever, carbon brush is detachably connected on cantilever by fixed clamp, carbon brush is connected data collector by wire;It further includes first spring, one end of first spring is connected on stand, and the other end is connected on cantilever;Fixed clamp includes the first connecting portion of C type structure, the second connecting portion of the outward extension is arranged at the both ends of first connecting portion respectively, fixed clamp is fixed by the bolt connection of two second connecting portions with cantilever, carbon brush is placed in the recess of first connecting portion and is locked and fixed by first locking bolt and first locking nut by being closely attached to cantilever.

[0007] The utility model of the above technical scheme is compared with prior art, and its outstanding features are:

[0008] The device replaces manual measurement by the device, avoids the risk of sprain caused by high-speed rotating shaft, ensures stable fixing of the carbon brush through the cooperation of the C-shaped first connecting part and the locking bolt, avoids loosening or deviation during detection, the second connecting part is bolted with the pick rod, the carbon brush can be quickly replaced, and the maintenance efficiency is improved, the pressure between the carbon brush and the shaft is kept balanced during measurement through the elastic force of the first spring, the carbon brush is always in stable contact with the surface of the shaft during measurement, and measurement fluctuation is reduced, the safety hidden danger and measurement error problems of the traditional detection method are effectively solved, and the device is suitable for high-precision shaft voltage detection in industrial field.

[0009] As preferred, the further technical scheme of the utility model is:

[0010] Preferably, the vertical rod comprises an outer sleeve and a core rod slidingly inserted into the outer sleeve, the base is provided with a slot matched with the outer sleeve, the lower end of the outer sleeve is inserted and fixed with the base through the slot, and the outer sleeve is further threadedly connected with a second locking bolt; when the outer sleeve is locked with the core rod, the end of the second locking bolt abuts against the core rod; the base provides stable support, the vertical rod is inserted and fixed with the outer sleeve through the slot, and quick installation and disassembly are facilitated; the height of the core rod can be adjusted to adapt to the detection requirements of generators of different sizes and improve the universality of the device.

[0011] Preferably, the pick rod comprises a connecting rod, one end of the connecting rod is provided with a connecting handle, and the other end is provided with a sliding slot; the upper end of the core rod is provided with a connecting slot matched with the connecting handle, the connecting handle is provided with a first through hole, the connecting slot is provided with a second through hole, the connecting handle is inserted into the connecting slot, and a hinge shaft penetrates through the first through hole and the second through hole to hingedly connect the connecting rod and the core rod; a sliding rod is slidingly connected in the sliding slot, the sliding rod is provided with a key groove, a second spring is arranged in the key groove, a key cap is connected to the second spring, and a plurality of adjusting holes are arranged on the connecting rod in correspondence with the key cap; the sliding rod can slide in the sliding slot and be fixed through the key cap and the adjusting holes, the horizontal position of the carbon brush is finely adjusted, and the detection requirements of different axial positions are adapted.

[0012] Preferably, the connecting rod is provided with a turning hole matched with the sliding rod perpendicularly to the sliding slot, and the turning hole is located below any adjusting hole.

[0013] Preferably, a plurality of first carabiners are arranged on the core rod at intervals, a plurality of second carabiners are arranged on the connecting rod at intervals, one end of the first spring is hooked on any first carabiner, and the other end is hooked on any second carabiner; the hooking position of the first spring is flexibly adjusted through the plurality of first carabiners and second carabiners, so that the pressing force of the carbon brush is accurately controlled, and the detection result is affected due to excessive pressing force (causing sparking) or insufficient pressing force (causing poor contact).

[0014] The first connecting hole is arranged on the second connecting part, a plurality of second connecting holes are arranged on the picking rod at intervals, a connecting bolt is penetrated through the first connecting hole and the second connecting hole and is locked and fixed by a connecting nut, a locking hole is arranged on a side wall of the first connecting part away from the picking rod, and a first locking bolt is penetrated through the locking hole and abuts against the carbon brush. BRIEF DESCRIPTION OF DRAWINGS

[0015] Fig. 1 is a structural schematic view of the shaft voltage detection device in the embodiment of the utility model;

[0016] Fig. 2 is a structural schematic view of the connecting rod in the embodiment of the utility model;

[0017] Fig. 3 is a structural schematic view of the fixed clamp in the embodiment of the utility model;

[0018] Fig. 4 is a structural schematic view of the sliding rod in the embodiment of the utility model.

[0019] Mark 1, base; 2, outer sleeve; 3, core rod; 4, second locking bolt; 5, connecting rod; 501, adjusting hole; 502, steering hole; 6, connecting handle; 601, first through hole; 7, sliding rod; 701, second connecting hole; 8, fixed clamp; 801, second connecting part; 802, first connecting part; 9, carbon brush; 10, first spring; 11, first carabiner; 12, second carabiner; 13, key cap; 14, second spring. DETAILED DESCRIPTION

[0020] The utility model is further described in combination with specific embodiments, and the purpose is only to better understand the content of the utility model, therefore, the example does not limit the protection scope of the utility model.

[0021] As Figs. 1 to 4As shown, the embodiment provides a shaft voltage detection device, which comprises a base 1, a vertical rod is arranged on the base 1, a cantilever rod is hinged to the upper end of the vertical rod, a carbon brush 9 is detachably connected to the cantilever rod through a fixing clamp 8, the carbon brush 9 is connected to a data collector through a wire; further comprising a first spring 10, one end of the first spring 10 is connected to the vertical rod, and the other end is connected to the cantilever rod; the fixing clamp 8 comprises a first connecting part 802 in C-shaped structure, second connecting parts 801 extending outward are arranged at both ends of the first connecting part 802 respectively, the fixing clamp 8 is fixedly connected to the cantilever rod through the two second connecting parts 801, the carbon brush 9 is placed in the groove of the first connecting part 802 and is locked and fixed through a first locking bolt and a first locking nut; specifically, a first connecting hole is arranged on the second connecting part 801, a plurality of second connecting holes 701 are arranged on the cantilever rod at intervals, a connecting bolt penetrates through the first connecting hole and the second connecting hole 701 and is locked and fixed through a connecting nut; a locking hole is arranged on the side wall of the first connecting part 802 away from the cantilever rod, and a first locking bolt penetrates through the locking hole and abuts against the carbon brush 9. Wherein, the base 1 is made of aluminum alloy casting, and a non-slip rubber pad is arranged at the bottom of the base 1; the data collector can be a multimeter, a voltage data collector, a voltage collector and the like.

[0022] The vertical rod comprises an outer sleeve 2 and a core rod 3 slidingly inserted into the outer sleeve 2, the core rod 3 is provided with scale lines on the surface, the base 1 is provided with a slot matched with the outer sleeve 2, the lower end of the outer sleeve 2 is inserted and fixed to the base 1 through the slot, and a second locking bolt 4 is threadedly connected to the outer sleeve 2, when the outer sleeve 2 is locked with the core rod 3, the end of the second locking bolt 4 abuts against the core rod 3.

[0023] The cantilever rod comprises a connecting rod 5, one end of the connecting rod 5 is provided with a connecting handle 6, and the other end is provided with a sliding groove; the upper end of the core rod 3 is provided with a connecting groove matched with the connecting handle 6, a first through hole 601 is arranged on the connecting handle 6, a second through hole is arranged on the connecting groove, the connecting handle 6 is inserted into the connecting groove, and a hinge shaft penetrates through the first through hole 601 and the second through hole to hingedly connect the connecting rod 5 and the core rod 3; a sliding rod 7 is slidingly connected in the sliding groove, the sliding rod 7 is provided with a key groove, a second spring 14 is arranged in the key groove, a key cap 13 is connected to the second spring 14, and a plurality of adjusting holes 501 are arranged on the connecting rod 5 corresponding to the key cap 13; the sliding rod 7 can slide in the sliding groove and is fixed through the key cap 13 and the adjusting holes 501, so as to realize the horizontal position fine adjustment of the carbon brush 9 and adapt to the detection requirement of different axial positions.

[0024] In use, the outer sleeve 2 is inserted into the slot of the base 1, the height of the core rod 3 is adjusted and locked through the second locking bolt 4 after adjustment, the carbon brush 9 is aligned with the shaft center by sliding the sliding rod 7, the key cap 13 is clamped into the corresponding adjusting hole 501, the carbon brush 9 is pre-pressed on the shaft through the elastic force of the first spring 10, and the shaft voltage is monitored through the data collector.

[0025] Further, the core rod 3 is provided with a plurality of first carabiners 11 at intervals, the connecting rod 5 is provided with a plurality of second carabiners 12 at intervals, one end of the first spring 10 is hooked on any first carabiner 11, and the other end is hooked on any second carabiner 12; the first spring 10 is allowed to be flexibly adjusted in the hooking position through the plurality of first carabiners 11 and second carabiners 12, so that the pressing force of the carbon brush 9 is accurately controlled, and the detection result is avoided from being affected by too large pressure (causing sparking) or too small pressure (causing poor contact).

[0026] The connecting rod 5 is provided with a turning hole 502 adapted to the sliding rod 7 and located below any adjusting hole 501; when the voltage of multiple points on the shaft needs to be detected, the sliding rod 7 can be slid out of the sliding groove, then the sliding rod 7 is inserted through the turning hole 502 and connected to the connecting rod 5, at this time, the sliding rod 7 is vertically arranged with the connecting rod 5 (the sliding rod 7 is parallel to the longitudinal direction of the shaft), then the key cap 13 is clamped into the adjusting hole 501 at a suitable position, the sliding rod 7 is fixed with the connecting rod 5, and a proper number of carbon brushes 9 are installed on the sliding rod 7 according to the points to be detected, each carbon brush 9 is electrically connected to a data collector; this structure can realize synchronous detection of the voltage of multiple points on the shaft.

[0027] The shaft voltage detection device realizes significant improvement in detection accuracy, operation convenience and function expandability, realizes height adjustment through the sliding cooperation of the sleeve pipe 2 and the core rod 3 (fixed through the second locking bolt 4), realizes length adjustment (horizontal position adjustment) of the sliding rod 7 through the structure of the connecting rod 5 and the sliding rod 7 and the second spring 14, the adjusting hole 501 and the key cap 13, ensures stable contact pressure of the carbon brush 9 through the pre-tightening force cooperation of the first spring 10 and the hook ring step adjustment, avoids pressure fluctuation of traditional manual pressing, realizes quick replacement of the carbon brush 9 through the fixing clamp 8, and realizes synchronous detection of the voltage of multiple points on the shaft through the turning hole 502 switching the direction of the sliding rod 7.

[0028] The above only describes the preferable embodiments of the present application, and does not limit the scope of the present application, and equivalent changes made by applying the content of the specification and drawings of the present application are included in the scope of the present application.

Claims

1. An axle voltage detection apparatus, characterized by: The base (1) is provided with a vertical rod, the upper end of the vertical rod is hinged with a cantilever rod, the cantilever rod is detachably connected with a carbon brush (9) through a fixed clamp (8), the carbon brush (9) is connected with a data collector through a wire; the first spring (10) is connected at one end to the vertical rod and at the other end to the cantilever rod; the fixed clamp (8) comprises a C-shaped first connecting part (802), the two ends of the first connecting part (802) are respectively provided with outwardly extending second connecting parts (801), the fixed clamp (8) is bolted and fixed with the cantilever rod through the two second connecting parts (801), the carbon brush (9) is placed in the groove of the first connecting part (802) and is locked and fixed through a first locking bolt and a first locking nut.

2. The shaft voltage detection apparatus according to claim 1, characterized by: The vertical rod comprises an outer sleeve (2) and a core rod (3) slidingly inserted into the outer sleeve (2), the base (1) is provided with a slot adapted to the outer sleeve (2), the lower end of the outer sleeve (2) is inserted and fixed with the base (1) through the slot, and the outer sleeve (2) is further threadedly connected with a second locking bolt (4), when the outer sleeve (2) is locked with the core rod (3), the end of the second locking bolt (4) abuts against the core rod (3).

3. The shaft voltage detection apparatus according to claim 2, characterized by: The cantilever rod comprises a connecting rod (5), one end of the connecting rod (5) is provided with a connecting handle (6), and the other end is provided with a sliding groove; the upper end of the core rod (3) is provided with a connecting groove adapted to the connecting handle (6), the connecting handle (6) is provided with a first through hole (601), the connecting groove is provided with a second through hole, the connecting handle (6) is inserted into the connecting groove, and a hinge shaft penetrates through the first through hole (601) and the second through hole to hingedly connect the connecting rod (5) and the core rod (3); A sliding rod (7) is slidingly connected in the sliding groove, the sliding rod (7) is provided with a key groove, the key groove is provided with a second spring (14), the second spring (14) is connected with a key cap (13), and the connecting rod (5) is provided with a plurality of adjusting holes (501) corresponding to the key cap (13).

4. The shaft voltage detection apparatus according to claim 3, characterized by: The connecting rod (5) is provided with a turning hole (502) adapted to the sliding rod (7) perpendicularly to the sliding groove, and the turning hole (502) is located below any adjusting hole (501).

5. The shaft voltage detection apparatus according to claim 3, characterized by: The core rod (3) is provided with a plurality of first carabiners (11) at intervals, the connecting rod (5) is provided with a plurality of second carabiners (12) at intervals, one end of the first spring (10) is hooked on any first carabiner (11), and the other end is hooked on any second carabiner (12).

6. The shaft voltage detection apparatus according to claim 1, characterized by: The second connecting part (801) is provided with a first connecting hole, the cantilever rod is provided with a plurality of second connecting holes (701) at intervals, a connecting bolt penetrates through the first connecting hole and the second connecting hole (701) and is locked and fixed through a connecting nut; a locking hole is arranged on the side wall of the first connecting part (802) away from the cantilever rod, and a first locking bolt penetrates through the locking hole and abuts against the carbon brush (9).

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