CN213633587U - Generator shaft voltage measuring device - Google Patents
Generator shaft voltage measuring device Download PDFInfo
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- CN213633587U CN213633587U CN202022778577.9U CN202022778577U CN213633587U CN 213633587 U CN213633587 U CN 213633587U CN 202022778577 U CN202022778577 U CN 202022778577U CN 213633587 U CN213633587 U CN 213633587U
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Abstract
The utility model discloses a generator shaft voltage measuring device, including detecting box, first contact mechanism and second contact mechanism, first contact mechanism includes arc connecting plate and arc contact piece, and arc connecting plate one side outer wall has the conductive spring that the equidistance distributes along the welding of circumferencial direction, the welding of conductive spring one end has arc contact piece, arc connecting plate bottom set up threaded hole, and the welding of screw hole top inner wall has concave type conductive gasket, and conductive spring one end is connected in concave type conductive gasket one end through the second wire, the screw hole spiro union has the threaded rod. The utility model discloses a with the arc contact block contact spindle surface of first contact mechanism and second contact mechanism, only need when needs detect the surface with first contact mechanism and second contact mechanism joint detecting box one side outer wall, can be with voltage, first guide transport to voltage sensor with arc contact block contact spindle, voltage sensor converts voltage into available output signal.
Description
Technical Field
The utility model relates to a generator shaft voltage detects technical field, especially relates to a generator shaft voltage measuring device.
Background
The generator set (including a turbine generator, a water turbine generator and a synchronous compensator) generates voltage on a shaft of the generator set due to some reasons, and if sufficient measures are not taken during installation and operation, when the shaft voltage is enough to break through an oil film between the shaft and a bearing, electric discharge can occur. Therefore, the lubricating and cooling oil is gradually degraded, and the bearing bush is burnt out in severe cases, so that the machine is stopped to cause accidents. It is therefore necessary to measure and check the voltage between the shaft and the bearings of the generator set during installation and operation. The shaft voltage generated by the generator set is mainly caused by the following reasons: the asymmetry of the magnetic flux of the generator generates a shaft voltage due to the asymmetry of the magnetic flux, which is called a "unipolar effect", and the asymmetry of the magnetic flux is approximately caused by the following reasons: 1. the local magnetic resistance of the stator core is larger, such as the local magnetic resistance is too large due to the corrosion of the stator core or the reason that the split stator core (mostly a hydro-generator) is not well assembled and jointed on site; 2. the asymmetry of the magnetic flux is caused by the non-uniform air gap between the stator and the rotor; 3. because the armature reaction of the fractional slot motor is not uniform, the magnetic flux of the rotor is asymmetric, and (II) static electricity generated by high-speed steam is charged due to the reasons that the shaft seal of a steam turbine coaxial with the generator is poor, the high-speed steam leakage along the shaft or the high-speed injection of the steam in a cylinder and the like, the shaft voltage with the property is sometimes very high, a person feels numb hands when touching the shaft, but the shaft voltage is not easy to be conducted to the side of an exciter, the oil film and a bearing bush are also possibly damaged on the side of a steam turbine, usually, a grounding carbon brush is connected and led to the shaft of the steam turbine for elimination, most of the existing generator shaft voltage measurement is detected by using a voltmeter, a stylus and the generator shaft contact type needs to be held by hands and easily scratches the surface of the shaft, the existing generator shaft voltage measurement device cannot be adjusted according to the size of the large circumference of, cannot be disassembled and is inconvenient to carry.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the defects existing in the prior art and providing a generator shaft voltage measuring device.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a generator shaft voltage measuring device comprises a detection box, a first contact mechanism and a second contact mechanism, wherein the first contact mechanism comprises an arc-shaped connecting plate and an arc-shaped contact block, conductive springs distributed equidistantly are welded on the outer wall of one side of the arc-shaped connecting plate along the circumferential direction, one end of each conductive spring is welded with the arc-shaped contact block, a threaded hole is formed in the bottom of the arc-shaped connecting plate, a concave conductive gasket is welded on the inner wall of the top of the threaded hole, one end of each conductive spring is connected to one end of the concave conductive gasket through a second lead, the threaded hole is screwed with a threaded rod, a convex conductive gasket is welded on the top of the threaded rod, a connecting rod is welded at one end of the threaded rod, which is far away from the convex conductive gasket, one end of the convex conductive gasket is connected with a first lead, and the first contact mechanism and the second contact, two mounting grooves have been seted up to detection box one side outer wall, and one side outer wall that the detection box is close to the mounting groove has seted up circularly and has put the wire casing, put wire casing one side inner wall and seted up the helicla flute, and the helicla flute all welds the card line piece that the equidistance distributes with mounting groove both sides inner wall, the helicla flute is connected with first wire joint each other.
Preferably, the first contact mechanism and the second contact mechanism are identical in structure.
Preferably, the convex conductive gasket and the concave conductive gasket are mutually lapped.
Preferably, the output end of the voltage sensor is connected and fixed with a display on the outer wall of one side of the detection box through a signal wire.
Preferably, the connecting rod connected to the first contact mechanism and the connecting rod connected to the second contact mechanism are respectively clamped in the two mounting grooves.
Preferably, the outer walls of two sides of the detection box are welded with handles, and the outer wall of one side of each handle is sleeved with an anti-skidding soft sleeve.
Preferably, one end, far away from the threaded rod, of the connecting rod is sleeved with an insulating sleeve.
Preferably, the arc-shaped contact block is made of a material with strong conductivity.
The utility model has the advantages that:
1. the arc-shaped contact blocks of the first contact mechanism and the second contact mechanism are in contact with the surface of the crankshaft, when the outer surface is required to be detected, the first contact mechanism and the second contact mechanism are only required to be clamped on the outer wall of one side of the detection box, the arc-shaped contact block is in contact with the crankshaft, voltage can be transmitted to the voltage sensor through the first guide, the voltage sensor converts the voltage into an available output signal, the output signal is transmitted to the display through a signal wire, observation is facilitated, when the two ends of the crankshaft are required to be measured, the second contact mechanism is only required to be taken down from the outer wall of one side of the detection box, detection for a long distance can be carried out, convenience and rapidness are realized;
2. through set up conductive spring between the arc connecting plate at arc contact piece because the arc connecting plate, can adjust according to the bent axle of different specifications, and measure longer distance can the centre gripping need not be handheld for a long time on the bent axle, practice thrift physical power, through set up the screw hole bottom the connecting plate, and the threaded rod spiro union at screw hole and connecting rod top, convenient to detach, portable, and weld protruding style of calligraphy conductive gasket and concave style of calligraphy conductive gasket respectively at screw hole and threaded rod one end, and both mutual joint, can not influence the detection ability when can disassembling.
Drawings
Fig. 1 is a schematic structural diagram of a generator shaft voltage measuring device provided by the present invention;
fig. 2 is a schematic structural diagram of a first contact mechanism of a generator shaft voltage measuring device according to the present invention;
fig. 3 is a schematic structural diagram of a detection box of a generator shaft voltage measuring device provided by the present invention;
fig. 4 is the utility model provides a structural schematic diagram of a generator shaft voltage measuring device helicla flute.
In the figure: the device comprises a first contact mechanism 1, a convex conductive gasket 2, an insulating sleeve 3, a detection box 4, a handle 5, a second contact mechanism 6, a threaded rod 7, a connecting rod 8, a first lead 9, a voltage sensor 10, a display 11, an arc contact block 12, an arc connecting plate 13, a conductive spring 14, a second lead 15, a concave conductive gasket 16, a spiral groove 17 and a wire clamping block 18.
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.
Referring to fig. 1-4, a generator shaft voltage measuring device comprises a detection box 4, a first contact mechanism 1 and a second contact mechanism 6, wherein the first contact mechanism 1 comprises an arc-shaped connecting plate 13 and an arc-shaped contact block 12, conductive springs 14 distributed at equal intervals are welded on the outer wall of one side of the arc-shaped connecting plate 13 along the circumferential direction, the arc-shaped contact block 12 is welded at one end of each conductive spring 14, a threaded hole is formed in the bottom of the arc-shaped connecting plate 13, a concave conductive gasket 16 is welded on the inner wall of the top of the threaded hole, one end of each conductive spring 14 is connected to one end of the corresponding concave conductive gasket 16 through a second wire 15, a threaded rod 7 is screwed in the threaded hole, a convex conductive gasket 2 is welded at the top of the threaded rod 7, a connecting rod 8 is welded at one end, far away from the convex conductive gasket 2, the first contact mechanism 1 and the second contact mechanism 6 are respectively connected to the positive and negative electrodes of the input end of a voltage sensor 10 fixed in the detection box 4 through first wires 9, the outer wall of one side of the detection box 4 is provided with two installation grooves, the outer wall of one side, close to the installation grooves, of the detection box 4 is provided with a circular wire placing groove, the inner wall of one side of the wire placing groove is provided with a spiral groove 17, wire clamping blocks 18 distributed at equal intervals are welded on the spiral groove 17 and the inner walls of the two sides of the installation grooves, and the spiral groove 17 is clamped with the first wires 9;
first contact mechanism 1 is the same with second contact mechanism 6 structure, the mutual overlap joint of type convex conductive gasket 2 and type concave conductive gasket 16, voltage sensor 10 output passing signal line connection is fixed in the display 11 of detecting box 4 one side outer wall, connect in connecting rod 8 of first contact mechanism 1 and connect in connecting rod 8 of second contact mechanism 6 joint respectively in two mounting grooves, it has handle 5 all to detect box 4 both sides outer wall, and 5 one side outer wall of handle has cup jointed the soft cover of antiskid, the one end that threaded rod 7 was kept away from to connecting rod 8 has cup jointed insulating cover, arc contact block 12 is made by the material that electric conductivity is strong.
The working principle is as follows: the arc contact block 12 of the first contact mechanism 1 and the second contact mechanism 6 is contacted with the surface of a crankshaft, when the outer surface is only required to be detected, the first contact mechanism 1 and the second contact mechanism 6 are only required to be clamped on the outer wall of one side of the detection box 4, the arc contact block 12 is contacted with the crankshaft, voltage can be transmitted to the voltage sensor 10 through the first guide 9, the voltage sensor 10 converts the voltage into a usable output signal, the output signal is transmitted to the display 11 through a signal wire, the observation is convenient, when the two ends of the crankshaft are required to be measured, the second contact mechanism 6 can be taken down from the outer wall of one side of the detection box 4 for long-distance detection, the detection is convenient, quick and convenient to store, the conductive spring 14 is arranged between the arc contact blocks 12 and the arc connecting plates 13, the detection can be adjusted according to the crankshafts with different specifications, and the long-distance measurement can be clamped on the crankshaft without long, practice thrift physical power, through set up the screw hole in connecting plate 13 bottom, and the screw hole 7 spiro union at screw hole and 8 tops of connecting rod, convenient to detach, portable, and weld protruding style of calligraphy conducting pad piece 2 and concave style of calligraphy conducting pad piece 16 respectively in screw hole and 7 one ends of screw rod, and both mutual joints, can not influence the detectability when can disassembling, can be convenient for accomodate first wire 9 through helicla flute 17 and the mutual joint of first wire 9 and avoid influencing the use.
The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.
Claims (8)
1. A generator shaft voltage measuring device comprises a detection box (4), a first contact mechanism (1) and a second contact mechanism (6), and is characterized in that the first contact mechanism (1) comprises an arc-shaped connecting plate (13) and an arc-shaped contact block (12), conductive springs (14) distributed at equal intervals are welded on the outer wall of one side of the arc-shaped connecting plate (13) along the circumferential direction, the arc-shaped contact block (12) is welded at one end of each conductive spring (14), a threaded hole is formed in the bottom of the arc-shaped connecting plate (13), concave-shaped conductive gaskets (16) are welded on the inner wall of the top of the threaded hole, one end of each conductive spring (14) is connected to one end of each concave-shaped conductive gasket (16) through a second wire (15), a threaded hole is connected with a threaded rod (7) in a threaded manner, each convex-shaped conductive gasket (2) is welded at the top of the threaded rod (7), and a connecting rod, convex type conducting gasket (2) one end is connected with first wire (9), first contact mechanism (1) and second contact mechanism (6) are connected in being fixed in the positive negative pole that detects the inside voltage sensor (10) input of box (4) through first wire (9) respectively, detect box (4) one side outer wall and seted up two mounting grooves, and detect box (4) and be close to one side outer wall of mounting groove and seted up circular wire casing of putting, it has offered helicla flute (17) to put wire casing one side inner wall, and helicla flute (17) and mounting groove both sides inner wall all weld card line block (18) that the equidistance distributes, helicla flute (17) and first wire (9) joint each other.
2. A generator shaft voltage measuring device according to claim 1, characterised in that the first contact means (1) and the second contact means (6) are of the same construction.
3. A generator shaft voltage measuring device according to claim 1, characterised in that the male (2) and female (16) electrically conductive pads overlap.
4. A generator shaft voltage measuring device according to claim 1, characterized in that the output of the voltage sensor (10) is connected to a display (11) fixed to the outer wall of the test case (4) on one side by a signal line.
5. A generator shaft voltage measuring device according to claim 1, characterised in that the connecting rod (8) connected to the first contact means (1) and the connecting rod (8) connected to the second contact means (6) are snap-fitted into two mounting slots, respectively.
6. The generator shaft voltage measuring device according to claim 1, characterized in that handles (5) are welded on the outer walls of two sides of the detection box (4), and an anti-skid soft sleeve is sleeved on the outer wall of one side of each handle (5).
7. A generator shaft voltage measuring device according to claim 1, characterised in that an insulating sleeve is sleeved on the end of the connecting rod (8) remote from the threaded rod (7).
8. A generator shaft voltage measuring device according to claim 1, characterised in that the arc-shaped contact block (12) is made of a highly electrically conductive material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022778577.9U CN213633587U (en) | 2020-11-26 | 2020-11-26 | Generator shaft voltage measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022778577.9U CN213633587U (en) | 2020-11-26 | 2020-11-26 | Generator shaft voltage measuring device |
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| Publication Number | Publication Date |
|---|---|
| CN213633587U true CN213633587U (en) | 2021-07-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202022778577.9U Active CN213633587U (en) | 2020-11-26 | 2020-11-26 | Generator shaft voltage measuring device |
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| CN (1) | CN213633587U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116223879A (en) * | 2023-01-10 | 2023-06-06 | 湖北清江水电开发有限责任公司 | Novel shaft voltage measuring tool universally applicable to hydraulic generator |
-
2020
- 2020-11-26 CN CN202022778577.9U patent/CN213633587U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116223879A (en) * | 2023-01-10 | 2023-06-06 | 湖北清江水电开发有限责任公司 | Novel shaft voltage measuring tool universally applicable to hydraulic generator |
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