CN2161003Y - Leakless liquid current collector for electric machine - Google Patents

Abstract

The utility model provides a current collector with no leakage of liquid for electric machine. The utility model is characterized in that The lower part of a conducting liquid box (cup) body is provided with a conducting ring and conjunctive binding posts. The diameter of a current collecting ring is larger than the diameter of a hollow ring of a rotating shaft. The diameter of a current collecting rod can be smaller than the diameter of the rotating shaft. The utility model is suitable for various steam and water wheel generators with large, middle or small specifications, diesel oil generators, synchronous motors and J (Y) R series wound rotor asynchronous motors.

Description

Leakless liquid current collector for electric machine

The utility model belongs to the current collecting equipment on the motor.

Current collecting equipment on the prior motor adopts electrographite brush to add spring pressure mechanism and the mode current collection of metal collector ring with sliding friction, and owing to graphite is non-metallic conduction material, resistivity is big, the energy consumption height; The energy consumption hear rate of mechanical friction is big, and it is to containing fuel gas in the environment that lacks oxygen and hydrone in plateau, high-altitude and the air, sour gas, greasy dirt, and the operational environment of hard dust is restricted; Contain a spot of cementite in the graphite carbon brush, carborundum is the anti-wear performance of the husky composition of Buddha's warrior attendant with the raising brush, but it is very harmful to motor also can to make the collector ring surface pull into groove; Collector ring and brush conduction current in the high-speed slide friction when machine operation; the air film of contact-making surface can float brush during rotation; cause loose contact and CURRENT DISTRIBUTION inequality to occur that spark, galvanic corrosion and brush are overheated to be caused the aging and insulation board charing of lead-in wire and leak electricity; and owing to spark, galvanic corrosion, mechanical wear cause the frequent shutdown of motor to change brush; revise collector ring; serious wear need be changed whole device, and maintenance workload is big, also hinders motor reliability of operation and fail safe.

In order to address this problem, China Patent No. 89213730.4 " brushless no wearing and tearing current collecting equipment " adopts with conducting liquid and conductive liquid casing and replaces electrographite brush mechanism, makes collector ring rotate current collection in conductive liquid and solves spark and wearing and tearing.Because the collector ring two ends in the device of above-mentioned application in conductive liquid casing and the rotating shaft have the closed-loop of insulation to prevent that conductive liquid from leaking; Because closed-loop is subjected to the high-speed slide friction and causes wearing and tearing during machine operation, causes conductive liquid to leak thereby closed-loop is destroyed; Guarantee that it is the reliable and stable key of this device that conductive liquid does not leak, with contact-type mechanical seal, expansion ring seale or non-contact type labyrinth seal, conventional arts such as dynamic seal all are difficult to guarantee not leak for a long time, and the volume of sealing mechanism and manufacturing cost all exceed the current collecting equipment body.

The purpose of this utility model is: provide a kind of liquid current collecting equipment that has improved at prior art deficiency, nothing that it is not only brushless wearing and tearing no-spark current collection, and exempted the complicated mechanical sealing mechanism, the conducting liquid that has solved the liquid current collecting equipment simultaneously keeps never leaking in conductive liquid case (cup) body.

Technical essential of the present utility model: be to adopt collector ring and conductive liquid case (cup) body with the upright unsettled fixing technical scheme that comprises, collector ring is made into cavity ring and clavate, wherein current collecting bar is fixed on the terminal center of rotating shaft, current collection cavity ring diameter needs greater than the rotating shaft diameter, can the current collection cavity ring be enclosed within the rotating shaft skin respectively according to the dissimilar and specification of motor, make the radially fixing of axial restraint or axle along rotating shaft; Then according to the diameter of current collection cavity ring and current collecting bar and the axially and radially fixed form in rotating shaft, conducting liquid case (cup) is made coupling comprise the cup shape that current collection cavity ring and current collecting bar are upper shed, the conducting ring that its bottom has fixing binding post connecting, conducting liquid injects in conductive liquid case (cup) body of vertical, when machine operation, the conducting ring that the binding post of electric current at the bottom of fixing conductive liquid case (cup) body connects imports the collector ring (rod) of rotation into by conducting liquid, to rotor conveying electric current; Can make into the liquid overflow-proof ring for high-speed electric expreess locomotive at conductive liquid case (cup) body mouth, can effectively prevent liquid spill, after in the electrical conduction current casing, injecting conductive liquid, the an amount of lightweight insulating oil that can reinject floats over the conductive liquid upper strata can effectively prevent the conducting liquid evaporation, and can play cooling and heat-absorbing action, thereby realize need not the no leakage liquid current collecting equipment of additional seal mechanism, it directly connecting shaft on vertical machine, use, can use spring for horizontal machine, rubber flexible axle or universal drive shaft 90 degree turn to connecting shaft to use.

The utility model compared with prior art has following advantage:

1, simple in structure, production and use, convenient for installation and maintenance, it need not complicated mechanical sealing additional mechanism providing additional operation, whole apparatus integration.

2, safety, reliable, no-spark not only, brushless does not have wearing and tearing, and conductive liquid never leakage in this device.

3, efficient, energy-conservation, the high efficiency of the collector ring of this device (rod) contact conductive area 100%, conductive liquid adopts mercury, through the Qj44 double bridge model machine the two poles of the earth contact resistance is determined as 0.00443 Ω, and the power consumption hear rate of its resistance is extremely low; And quiet, dynamically good contact performance arranged all.Improve the dynamic stability performance of machine operation greatly.

4, widely applicable, adaptability is strong, the environment present technique device that the high source area that can't work to general brush and high-altitude, oxygen and hydrone lack is all applicable, also can be used on the fire-proof motors such as chemical industry, colliery, it not only is applicable to each large, medium and small hydraulic generator, turbo generator, diesel engine generator and synchronous motor, j(Y) brushlessization of R series wound rotor asynchronous machine, and have highly versatile, avoided selecting error for use and caused electrical fault because of type, the specification of brush (graphite matter, electrographite metallic graphite carbon).

5, cost is low, long service life, and it is with the electrical insulating material of routine, conducting metal and conducting liquid, investment to the new product development of the non-brushing of motor and explosion-proof and old motor reconstruct is minimum, and can coexist its useful life with motor, depends primarily on the working life of bearing.

Enforcement of the present utility model is provided by the following drawings explanation.

Fig. 1 is that the no leakage liquid current collecting equipment that is used for horizontal machine is implemented structure chart.

There are two shaft joints (3) and flexible axle or universal drive shaft (2) to link into an integrated entity at each end of machine shaft (1) current collecting equipment rotating shaft (4), by shaft central hole extracting power supply cord (7), being connected sieve silk (8) fixes and current collection cavity ring (11), (12), (13) is housed fixedly on sieve silk joint pin (16) on the current collection ring seat (9), current collecting bar (10) is fixed on the shaft central hole, forms motor synchronous rotation current collection part.There is conducting ring (17) to be connected terminal (18) under fixing conductive liquid case (cup) body with fixing sieve silk; Outer casing frame (15) is lived rotating shaft with bearing shell (5) by sieve silk (6) location, fixedly sieve silk (14) of device is connected and fixed total conductive liquid case (cup) body (21), conductive liquid (20) and insulating oil (19) are respectively in conductive liquid case (cup) body of each circle separate space, when machine operation, the current collection cavity ring (rod) of rotation is in fixed case (cup) body of conductive liquid in comprising and rotates current collection, can be used for three-phase and four-line motor and rotating armature threephase generator, be used for the alternator rotor excitation and can make two collector rings (rod) and casing.

Fig. 2 is that the no leakage liquid current collecting equipment that is used for vertical machine is implemented structure chart.

Current collecting equipment rotating shaft (4) can be coaxial with machine shaft, remove flexible axle and the shaft joint part of Fig. 1 from, current collection ring seat (9) is fixed in the rotating shaft by sieve silk (8) with current collecting bar (10), fixedly sieve silk binding post (16) that power line (7) is connected on current collection cavity ring (11) by shaft central hole go up and current collecting bar (10) on, formed the motor synchronous rotating part.Fixing conductive liquid case (cup) body (21) and outer casing frame (15) and bearing shell (5) by sieve silk (6) with install fixedly sieve silk (14) and fixedly connected and be integral, conducting ring (17) is fixed on each conductive liquid case (cup) body bottom by sieve silk binding post (18), conductive liquid (20) insulating oil (21) coexists in case (cup) body, can make a liquid overflow-proof ring on fixing fluid box (cup) body top, when machine operation, the current collection cavity ring (rod) of rotation is in fixed case (cup) body of conductive liquid in comprising and rotates current collection, not only conductive liquid never leaks, and can not evaporate, do not overflow; Two utmost point current collections that can be used for rotor are wanted dissimilar motor collecting ring number needs, can select the axial combination of rotating shaft and quantity to select to make.

Claims (1)

1, a kind of no leakage liquid current collecting equipment of motor, this device has case (cup) body (21) that contains conducting liquid, include the current collection ring seat (9) and current collection cavity ring (11), (12), (13) and the current collecting bar (10) that are connected with rotating shaft therein, contain conducting liquid (20) in conducting liquid case (cup) and between the collector ring (rod), it is characterized in that:

Conducting ring (17) and the binding post that is being connected (18) are arranged under a, described conducting liquid case (cup) body (21),

B, described collector ring (11), (12), (13) are the cavity ring of diameter greater than rotating shaft, and current collecting bar (10) diameter can be less than rotating shaft,

C, described collector ring (rod) and conductive liquid case cup be upright unsettled comprise fixing.

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