CN203522373U - Magnetic pole-filling steel bar for impact generator - Google Patents

Abstract

The utility model discloses a magnetic pole-filling steel bar for an impact generator. The magnetic pole-filling steel bar for the impact generator is installed in the longitudinal groove of each rotor magnetic pole of the impact generator; the magnetic pole-filling steel bar for the impact generator is provided with a balance screw hole and a locking groove; a balance screw is provided with an annular easily-locking ditch, after the balance screw is screwed in the screw hole, the annular easily-locking ditch part of the balance screw is punched, so that the balance screw has a partial plastic deformation and is extruded in the locking groove of the magnetic pole-filling steel bar for the impact generator to form a screw stopping structure; the installation quantity and positions of the balance screws are decided according to the requirements of rotor dynamic balance to form a locking structure capable of realizing operations under the use conditions of the balance screws, so that the rotor structure can realize ideal dynamic balance indexes.

Description

Surge generator magnetic pole is filled steel bar

Technical field: the utility model relates to a kind of surge generator magnetic pole and fills steel bar.

Background technology: surge generator is different from conventional generator, its operation characteristic be exactly whole service operating mode be all the transient process in suddenly-applied short circuit, be equivalent to conventional generator accident conditions, structural design should guarantee that generator can provide shock test required large electric current, stator end structure should be able to be born frequent huge electric power and be impacted, and possesses high reliability reaching in the useful life period of 30 or 40 years; Narration as relevant in article " 6500MVA surge generator rotor slot wedge pole-face structure and rigidity balance " (large motor technology 2008No.7) is known, by formula:

$\frac{P_A}{P_E}={\left(\frac{X_d^{\′\′}}{X_d^{\′}}\right)}^e{[\mathrm{\ρ}\frac{X_d^{\′}}{X_d}+(1-\mathrm{\ρ}\frac{X_d^{\′}}{X_d})e^{-\frac{t}{T\frac{N}{d}}}+(\frac{X_d^{\′}}{X_d^{\′\′}}-1)e^{-\frac{t}{T\frac{N}{d}}}]}^2$

P _efor giving the mechanical stress of motor, and P _ait is the available power of tested switch; Reasonably design, should make P _awith P _edifference as much as possible little; For surge generator, T _d'=0.5～1.5s, T _d"=0.04～0.08s; On the other hand, be roughly at 5 to 10 half-waves the duration of short-circuit.If we have considered that the super transient component of short circuit current is a lot of in this time decay, and field-forcing almost can not affect this component, obviously X _d' with X _d" difference numerically must be reduced to minimum value.So it is necessary forming powerful absolute damping winding at rotor, so the rotor of surge generator is the key structure of realizing overall performance, as the claims of patent ' surge generator ZL2007 1 0144310.0 ' is narrated: " have cannelure (2) on rotor magnetic pole, magnetic steel bar (12) is arranged in cannelure, armature spindle end face is given prominence at magnetic steel bar two ends, groove fit with utmost point heart cushion block (13), direct-axis cushion block (14) is filled between rotor coil, magnetic steel bar, utmost point heart cushion block, the circulus of direct-axis cushion block and rotor coil complete, rotor adopts whole roots rotor slot wedge (4), interlacing absolute damping damping winding (3) is installed " under slot wedge, the elaborate combination of the structure of these particular design, to realizing generator, can provide the required large electric current of shock test and duration requirement.

Also there is space that can optimization and upgrading in the rotor structure that patent ' surge generator ZL 2,007 1 0144310.0 ' is narrated, static balance and the required structure of dynamic balancing on whole rotor structure, have been ignored, the dynamic balancing index that has caused actual product rotor to be difficult to realize ideal, cause operational shock value to exceed standard, the quality problems such as bearing shell coal earlier period damage comes off, its reason is because rotor magnetic pole exists cannelure, the short of width of the formed tooth head of rotor body holds mass screw hole, the way that conventional turbo generator is processed mass screw hole on rotor magnetic pole canine tooth cannot realize, have no alternative but adopt the way of settling special balancing ring in two ends of rotor footstalk position, as Fig. 6, shown in 7, counterbalance effect is difficult to reach the scheme of processing mass screw hole on the magnetic pole canine tooth of rotor body, and the dynamic balancing index that causes actual product rotor to be difficult to realize ideal, causes the problems such as operational shock value exceeds standard.

The rotor balancing structure of conventional turbo generator as shown in Figure 8,9, rotor magnetic pole 23 has the crescent 24 of rigidity equilibrium, rotor magnetic pole 23 has mass screw hole 25, can the actual dynamic balancing demand of root tool be installed by mass screw, but this structure cannot realize the requirement of settling damping winding on rotor magnetic pole; For realizing performance requirement, surge generator must be settled damping winding on rotor magnetic pole, so adopt rotor structure as shown in Figure 6,7, as patent ' surge generator ZL 2,007 1 0144310.0 ', patent ' are opened rotor canine tooth ZL 2,007 20116085.5 ', patent ' the whole roots rotor slot wedge ZL 2,007 2 0115971.6 ' of cannelure, but this structure cannot realize at rotor body mass screw is installed, and brings the problems such as operational shock value exceeds standard.

Summary of the invention: the purpose of this utility model is to provide a kind of practicable surge generator magnetic pole and fills steel bar organization plan, this surge generator magnetic pole is filled steel bar with mass screw and under its service condition, can be realized the locking mechanism of operation, guarantees the object of the dynamic balancing index that rotor structure can be realized ideal.The technical solution of the utility model is: a kind of surge generator magnetic pole is filled steel bar, be arranged in the cannelure of surge generator rotor magnetic pole, surge generator magnetic pole is filled steel bar with mass screw hole, and with locking groove, mass screw is easily locked groove with annular.

Technique effect: fill steel bar because the technical program adopts surge generator magnetic pole, can reach magnetic property requirement, and surge generator magnetic pole is filled steel bar with mass screw and under its service condition, can be realized the locking mechanism of operation, the dynamic balancing index that rotor structure can be realized ideal.

Accompanying drawing explanation:

Fig. 1 is the utility model application schematic diagram.

Fig. 2 is the utility model application cross sectional representation.

Fig. 3 is the utility model application section enlarged diagram (mass screw and shutoff plug screw are not installed).

Fig. 4 is the longitudinal profile schematic diagram (mass screw and shutoff plug screw have been installed) of Fig. 3.

Fig. 5 is the vertical view of Fig. 4.

Fig. 6 is that conventional art surge generator magnetic pole is filled steel bar schematic diagram.

Fig. 7 is that conventional art surge generator magnetic pole is filled steel bar cross sectional representation.

Fig. 8 is conventional art rotor of steam turbo generator schematic diagram.

Fig. 9 is conventional art rotor of steam turbo generator cross sectional representation.

Embodiment:

Fig. 1 is the concrete application of the utility model in surge generator, as Fig. 2, 3, 4, shown in 5, the interior installation surge generator of cannelure 2 magnetic pole of rotor magnetic pole is filled steel bar 7, surge generator magnetic pole is filled steel bar 7 groove 4 for locking, mass screw 5 is easily locked groove 6 with annular, mass screw 5 is screwed into after screw 3, in the annular of mass screw 5, easily lock groove 6 positions and play ocean punching, make, at mass screw 5, local plastic deformation occurs, clamp-on surge generator magnetic pole and fill the groove 4 for locking of steel bar 7, form screw stop structure 8, because the locking of mass screw 5 is filled the textural association of groove 4 for the locking of steel bar 7 with groove 6 and surge generator magnetic pole, being locked under its application conditions of mass screw 5 becomes possibility, the locking mechanism of routine techniques cannot be implemented because state space is limited, mass screw 5 determines to install quantity and position according to the requirement of rotor dynamic balancing,

As Fig. 2, 3, 4, shown in 5, the whole roots rotor slot wedge of surge generator is provided with intensive contact-type interlacing absolute damping damping winding 10 for 9 times, intensive contact-type interlacing absolute damping damping winding 10 forms 12 by upper strata amortisseur bar 11He lower floor amortisseur bar, upper strata amortisseur bar 11He lower floor amortisseur bar 12 has mass screw adjusting hole 13, position is corresponding with mass screw 5, for subsequent step, by rotor dynamic balancing requirement, mass screw 5 is installed operating space is provided, the upper surface of upper strata amortisseur bar 11He lower floor amortisseur bar 12 has the balanced texture of conduction, before assembling, section configuration as shown in Figure 7, upper strata amortisseur bar 11He lower floor amortisseur bar 12 adopts fine copper manufacture, section state after assembling swaging as shown in Figure 8, the conductive contact state forming as shown in Figure 9, guarantee that upper strata amortisseur bar 11Yu lower floor amortisseur bar 12 and upper strata amortisseur bar 11 and whole roots rotor slot wedge 9 conductive contacts with mass screw adjusting hole are evenly distributed, make upper strata amortisseur bar 11, lower floor's amortisseur bar 12, the whole roots rotor slot wedge of surge generator is approximately integrative-structure on conductive structure, make damping current path resistor little, eliminate local pyrexia phenomenon,

As Fig. 2, 3, 4, shown in 5, the whole roots rotor slot wedge 9 of surge generator has groove 14 for locking, shutoff plug screw 15 is easily locked groove 16 with annular, shutoff plug screw 15 is screwed into after screw, in the annular of shutoff plug screw 15, easily lock groove 16 positions and play ocean punching, make shutoff plug screw 15 that local plastic deformation occur, clamp-on the groove 14 for locking of the whole roots rotor slot wedge 9 of surge generator, form plug screw chocking construction 17, because shutoff plug screw 15 adopts soft aluminum manufacture, allow to adopt above-mentioned locking scheme of playing ocean punching, its annular easily lock groove 16 cooperatively interacts with groove 14 with the locking of the whole roots rotor slot wedge 9 of surge generator, make being locked under its application conditions of himself become possibility, and the whole roots rotor slot wedge of surge generator adopts the manufacture of duralumin material for requirement of strength, if adopt the locking mechanism of routine techniques, local material breakage problem can occur, cannot implement, the screw of the whole roots rotor slot wedge 9 of all surge generators is all used 15 shutoff of shutoff plug screw, reaches the object that reduces rotor surface windmill loss and reduce damping current path resistor, this utility model project organization and details fully take into account the influencing factors such as actual mismachining tolerance, implementation and operation, rotor dynamic balancing demand, guarantee the dynamic balancing index that actual product rotor is realized ideal, and guarantee that operational shock value is outstanding,

The rotor balancing structure of conventional turbo generator is as Fig. 8, shown in 9, rotor magnetic pole 23 has the crescent 24 of rigidity equilibrium, rotor magnetic pole 23 has mass screw hole 25, can the actual dynamic balancing demand of root tool be installed by mass screw, but this structure cannot realize the requirement of settling damping winding on rotor magnetic pole, so conventional art surge generator often adopts as Fig. 6, rotor structure shown in 7, damping winding 18 is installed, mass screw 20 is arranged in the screw of balancing frame 19, as patent ' surge generator ZL 2,007 1 0144310.0 ', patent ' is opened the rotor canine tooth ZL 2,007 2 0116085.5 ' of cannelure, patent ' whole roots rotor slot wedge ZL 2,007 20115971.6 ', but damping and requirement for dynamic balance cannot meet the demands, and balancing frame 19 also can bring draft loss, affect rotor heat radiation, the utility model has solved these deficiencies.

Claims (1)

1. a surge generator magnetic pole is filled steel bar, it is characterized in that: surge generator magnetic pole is filled steel bar (7) and is arranged in the cannelure (2) of surge generator rotor (1) magnetic pole, surge generator magnetic pole is filled steel bar (7) with mass screw hole (3), with groove (4) for locking, mass screw (5) is easily locked groove (6) with annular.

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