CN1610226A

CN1610226A - Dynamic torque loader

Info

Publication number: CN1610226A
Application number: CN 200410037100
Authority: CN
Inventors: 白文普
Original assignee: Yanshan University
Current assignee: Yanshan University
Priority date: 2004-06-02
Filing date: 2004-06-02
Publication date: 2005-04-27
Anticipated expiration: 2024-06-02
Also published as: CN100342628C

Abstract

The present invention is one dynamic torque loader, and features that the armature winding embedded inside the slots of armature iron core is connected via the slot of armature shaft to the sliding ring fixed with insulating sleeve, so as to input the DC current through brushes; that one or two pairs of windings on the magnetic yoke with exciting coil drive the exciting part to rotate relatively to the armature part, so as to change the frequency of the loading torque; and that the brushes connected to the upper casing are pressed on the sliding ring to lead in DC current. The dynamic torque loader changes the frequency of the added sinusoidal torque by means of changing the relative rotation speed between the rotatable exciting part and the armature part; and changes the amplitude of the added torque arbitrarily in wide range by means of changing the current through the armature winding.

Description

Dynamic torque loader

Technical field

The present invention relates to a kind of charger that produces near sinusoidal waveform moment of torsion based on the stressed principle of current in the magnetic field.The dynamic calibration that is particularly useful for torque sensor.

Background technology

Best loader is a ZC type magnetic powder brake at present, and it is a working media with the magnetic, is control device with the exciting curent, to reach the purpose of control brake or loading moment of torsion.Its output torque and exciting curent are the better linearity relation and have nothing to do with rotating speed and slippage, but its practicality adds static torque.If add dynamic torque with it following shortcoming is arranged: (1) reaction rate is slow, and the change in torque one-period needs time several seconds at least; (2) Huo Dong magnetic is difficult to make each cycle dynamic torque waveform to keep identical; (3) the logical alternating current of magnetizing coil can be overheated.

Summary of the invention

For overcoming the problem that can not demarcate dynamic torque sensor that existing loader exists, the invention provides a kind of near sinusoidal waveform Dynamic torque loader, this equipment by the relative rotation speed that changes rotatable excitation part and armature portion change add the frequency of sinusoidal waveform moment of torsion; Simultaneously, by the electric current that changes armature winding can in a big way, change arbitrarily add the amplitude of moment of torsion.

The technical solution adopted for the present invention to solve the technical problems is: armature shaft 1, armature core 2 and feed the armature portion that galvanic armature winding coil 3 forms and drag it along W by external impetus ₁Direction is rotated; A pair of or two pairs of main poles of evenly arranging along yoke 6 circumference in the alter polarity mode produce magnetic field, described main pole is by being fixed on main pole core 4 on the yoke 6 and cover and feed (see figure 1) that galvanic excitation winding pole coil 5 is formed thereon, and the magnetic flux that main pole produces is via main pole (N) → air gap → armature → air gap → main pole (S) → yoke 6 → get back to again main pole (N) formation closed magnetic path.According to the electromagnetic force law, the moment of torsion and the armature rotation direction W that cause at the electromagnetic force f of armature surface effect ₁Identical is driving torque.Armature portion drags lower edge W in external force ₁Direction is rotated further, when it turns over 360 °/2p, and moment of torsion and the armature rotation direction W that cause at the electromagnetic force f of armature surface effect this moment ₁Be the braking torque (see figure 2) on the contrary.Armature shaft 1 is along W like this ₁Bear when direction is rotated with the cycle is approximate (cause electromotive force because of armature rotates, make the armature supply fluctuation) sinusoidal waveform moment of torsion of 360 °/p.Add the frequency change requirement of sinusoidal waveform moment of torsion for satisfying, can adjust the angular speed W that drags rotatable excitation part by external impetus ₂, changing the relative rotation speed of excitation part and armature portion, thus reach change add the purpose of sinusoidal waveform moment of torsion frequency.

The main pole logarithm is 1-2, and the groove number of armature surface is 16-48, and armature surface is offered groove and counted Z should to satisfy Z/2p be integer, the groove number of Z-armature surface wherein, P-main pole logarithm.

Armature winding coil 3 is made up of the big coil identical with the logarithm of main pole, and each big coil is put in order by single turn or multiturn Z/2p the folded right lateral of small coil list again and formed apart from coiling.

Description of drawings

Schematic diagram when Fig. 1 armature is subjected to driving torque;

Schematic diagram when Fig. 2 armature is subjected to braking torque;

Schematic diagram when the input dc power of Fig. 3 armature winding coil is identical with its induced current;

Schematic diagram when the input dc power of Fig. 4 armature winding coil is opposite with its induced current;

The schematic diagram of Fig. 5 armature core;

Fig. 6 first example structure figure;

Fig. 7 second example structure figure;

Fig. 8 the 3rd example structure figure.

In above-mentioned figure, 1 armature shaft, 2 armature cores, 3 armature winding coils, 4 main pole cores, 5 excitation winding pole coils, 6 yokes, 7 brushes, 8 slip rings, 9 insulating cases, 10 dextrorotation rotating disks, 11 fans, 12 bearings, 13 outrigger shafts, 14 bearings, 15 lower boxes, 16 brushes, 17 slip rings, 18 insulating cases, 19 grooves, 20 left-handed rotating disks, 21 upper boxes, 22 big end caps, 23,24 bearings, 25 a set of cups, 26 housings, 27 bearings, 28 rotation-preventing mechanisms.

Embodiment

Embodiment 1: the present invention is further described below in conjunction with drawings and Examples.Fig. 6 is first example structure of Dynamic torque loader figure.It is made up of three parts, and first is armature portion: it forms (seeing Fig. 1, Fig. 2) by armature shaft 1, armature core 2 and armature winding coil 3.Armature core 2 is to be formed and used key joint with armature shaft 1 by silicon steel plate stacking.The excircle of armature core 2 (see figure 5)s offers Z groove, so that the galvanic armature winding coil 3 of feeding is embedded in groove.Armature shaft 1 is supported in respectively on left-handed rotating disk 20 and the dextrorotation rotating disk 10 by pair of bearings 12.The groove 19 offered by armature shaft 1 of armature winding coil 3 of rotation is connected with the slip ring 17 that insulating case 18 connects firmly, and with upper and lower casing 21, the 15 relative brushes that connect firmly 16 direct current is imported armature winding coil 3 by being pressed on the slip ring 17.Armature shaft 1 overhanging being used for connects so that drag armature portion with W with outside ₁Rotate.Now with single folded right lateral, Z=16, p=2 are example, armature winding 3 (seeing Fig. 3, Fig. 4), first segment distance: y ₁=Z/2p=4; Second pitch: y ₂=1-4=-3; Resultant pitch: y=y ₁+ y ₂=4-3=1.

Armature is launched (seeing Fig. 3, Fig. 4) along OF, see to the center that by armature surface main pole is on armature surface.The magnetic line of force of the N utmost point is to enter paper, and the magnetic line of force of the S utmost point is outside by paper, and the armature rotation direction is shown in the arrow in Fig. 3 upper left corner.According to right-hand rule moment as shown in Figure 3, the inductive current direction in armature winding 3 each limit is shown in the arrow in each component outline of Fig. 3.Armature winding and the arrow on the slip ring line at the armature front end are the galvanic sense of current of input armature.In moment shown in Figure 3, the sense of current of input armature winding is identical with the inductive current direction in the armature winding, at this moment the electric current maximum in the armature winding.According to left hand rule, this moment armature be subjected to force direction shown in the arrow in Fig. 3 upper right corner.This moment, electromagnetic torque was maximum and opposite with rotation direction (direction of arrow in Fig. 3 upper left corner), was braking moment.Armature drags the direction of arrow that continues down along Fig. 3 upper left corner in external force and rotates, and when turning over 360 °/2p (90 ° time), the relative position of main pole and armature winding as shown in Figure 4.This moment, the input current of armature was opposite with the inductive current direction of armature, and electromagnetic torque this moment minimum and identical with rotation direction (shown in the arrow in Fig. 4 upper right corner) is driving moment.Second is rotatable excitation part.It is a pair of or two pairs of main pole core 4 and cover excitation winding pole coils 5 thereon that the low carbon steel plate punching is overrided to form, and with screw main pole core 4 is fixed on the yoke 6 yoke 6 usefulness bolts and the left-handed rotating disk of making by cast steel 20 and dextrorotation rotating disk 10 connects firmly and be supported on upper box 21 and the lower box 15 by pair of bearings 14.Outrigger shaft 13 connects firmly with dextrorotation rotating disk 10, is connected by external impetus and outrigger shaft 13 to drag rotatable excitation division and divide relative to armature portion and rotates, with the frequency of change loading sinusoidal waveform moment of torsion.With fixing slip ring 8 again on the fixing insulating case 9 of yoke 6, be pressed on the slip ring 8 with the upper box 21 relative brushes that connect firmly 7, to give excitation winding pole coil 4 logical direct currents.The fan 11 that connects firmly with armature shaft 1 is used for heat radiation.The 3rd for supporting and standing part, and it is made up of upper box 21 and lower box 15, and its significant feature is to support, fix and protection.

Embodiment 2: it also is made up of three parts, and first to be armature portion identical with armature portion among first example structure figure, and just armature shaft 1 is bearing in respectively on axle 23 and the big end cap 22 by pair of bearings 12.Armature winding coil 3 (as shown in Figure 3, Figure 4) is connected with the slip ring 17 that insulating case 18 connects firmly by the groove of offering on the armature shaft 1 19, is connected with power supply by the brush 16 that is pressed on the slip ring 17.Armature shaft 1 is overhanging to be connected with external impetus, so that make armature portion with W shown in Figure 1 ₁Direction is rotated.Fan 11 is used for heat radiation.Second is rotatable excitation part, and also the rotatable excitation division separation structure in first example structure figure is identical for it, but yoke 6 is only connected firmly by bolt with axle 23.Axle 23 is supported in a set of cups 25 by pair of bearings 24, and yoke 6 forms cantilever positions.Axle 23 is overhanging so that drag the excitation partial rotation with external impetus, with the relative motion of change excitation part with armature portion.Excitation winding pole coil 5 is connected with the slip ring 8 that insulating case 9 connects firmly.By being connected with power supply with the housing 26 relative brushes 7 that connect firmly and be pressed on the slip ring 8.Third part is that 26 of housings support and fixation.A set of cups 25 and big end cap 22 are all connected firmly by screw and housing 26.

Embodiment 3: it is applicable to the occasion that does not need to change arbitrarily sinusoidal waveform moment of torsion frequency.It also is made up of three parts, and first is an armature portion, and its armature portion with first example structure figure is identical.Armature shaft 1 is supported on respectively on left-handed rotating disk 20 and the dextrorotation rotating disk 10 by pair of bearings 12.Armature winding coil 3 is connected by slip ring 17 fixing on the groove 19 offered on the outrigger shaft 1 and the insulating case 18, and by linking to each other with power supply with the dextrorotation rotating disk 10 relative brushes 16 that are pressed on the slip ring 17 that connect firmly.Second is the excitation part of not changeing, this part is identical with first example structure figure by excitation winding pole coil 5, main pole core 4 and yoke 6, but yoke 6 connects firmly and is supported on the bearing 27 by pair of bearings 14 with left-handed rotating disk 20 and dextrorotation rotating disk 10 usefulness bolts respectively, for the excitation part is not changeed, between yoke 6 and bearing 27, be provided with rotation-preventing mechanism 28.

Claims

1. Dynamic torque loader, it is characterized in that: armature core (2) is used key joint with armature shaft (1), the excircle of armature core (2) offers groove, embed armature winding coil (3) in the groove, armature shaft (1) is supported in respectively on left-handed rotating disk (20) and the dextrorotation rotating disk (10) by pair of bearings (12), the groove (19) that armature winding coil (3) is offered by armature shaft (1) is connected with the slip ring (17) that insulating case (18) connects firmly, and by the brush (16) that is pressed on the slip ring (17) direct current is imported armature winding coil (3); A pair of or two pairs be fixed on the yoke (6) by main pole core (4), cover excitation winding pole coil (5) on it, yoke (6) and left-handed rotating disk (20) and dextrorotation rotating disk (10) connects firmly and be supported on upper box (21) and the lower box (15) by pair of bearings (14), outrigger shaft (13) connects firmly with dextrorotation rotating disk (10), divide relative to armature portion and rotate so that drag rotatable excitation division, to change the frequency that loads moment of torsion; Go up fixedly slip ring (8) with the insulating case (9) that yoke (6) is fixing, the brush (7) that connects firmly with upper box (21) is pressed on the slip ring (8), so that give excitation winding pole coil (5) logical direct current.

2. Dynamic torque loader according to claim 1 is characterized in that: the groove number is offered on armature shaft (1) surface, and should to satisfy Z/2p be integer, and its groove number is 16-48.

3. Dynamic torque loader according to claim 1 is characterized in that: armature winding coil (3) is made up of the big coil identical with the logarithm of main pole, and each big coil is put in order by single turn or multiturn Z/2p the folded right lateral of small coil list again and formed apart from coiling.

4. Dynamic torque loader according to claim 1 is characterized in that: yoke (6) is connected firmly by bolt with axle (23), and axle (23) is supported in a set of cups (25) by pair of bearings (24), and its axle head connects external impetus and drags yoke (6) rotation.

5. Dynamic torque loader according to claim 1, it is characterized in that: yoke (6) connects firmly with bolt with left-handed rotating disk (20) and dextrorotation rotating disk (10) respectively and is supported on bearing (27) with pair of bearings (14), and it is fixing to be provided with rotation-preventing mechanism (28) between yoke (6) and the bearing (27).

6. Dynamic torque loader according to claim 1 is characterized in that: connect firmly fan (11) on the armature shaft (1) and be used for heat radiation.