CN2200864Y

CN2200864Y - Centrifugal contacter

Info

Publication number: CN2200864Y
Application number: CN 94217277
Authority: CN
Inventors: 臧怀沛; 臧瀛成; 臧瀛芝
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-07-16
Filing date: 1994-07-16
Publication date: 1995-06-14
Anticipated expiration: 2004-07-16

Abstract

The utility model relates to a centrifugal contactor, belonging to a mechanical device which controls the closure and the opening of the contacts of a circuit by centrifugal force, and comprising a wheel disk which is fixed on a rotating shaft and a central shaft; the central shaft is provided with a fixed sleeve, a spring and a movable sleeve. The fixed sleeve and the movable sleeve are respectively provided with a centrifugal rod and an arm rod whose apart included angle is 120 DEG. A centrifugal ball is fixedly arranged on the centrifugal rod, and the centrifugal ball is provided with a hooking device for control to be matched with the centrifugal ball; the hooking device for control is fixed on a wheel disc. One end of the arm rod is connected with the movable contacts of a contactor; static contacts to be matched with the movable contacts are fixedly arranged on the wheel disc. The utility model is particularly suitable for sensitive inverters without brushing frequency; the utility model can also be used for other equipment related with rotational speed control.

Description

Centrifugal contacter

The utility model relates to a kind of centrifugal contactor, belongs to the mechanical device that relies on centrifugal force controlled circuit contact closure and unlatching.

The console mode frequency sensitive trheostat is generally adopted in the starting that exchanges wire wound asynchronous motor at present, when motor starting during near rated speed with the frequency sensitive trheostat short circuit.Because frequency sensitive trheostat needs to join with the slip ring and the brush of motor, and needs a cover control appliance, make its control become complicated, and use unreliable.For overcoming above-mentioned shortcoming, brushless frequency sensitive trheostat on probation in recent years, soon wire wound asynchronous motor slip ring, brush remove, and frequency sensitive trheostat is installed on the motor reel, but owing to its frequency sensitive trheostat is serially connected in the motor rotor loop, the one, the loss of rheostat own; The 2nd, the reactance in the frequency sensitive trheostat degenerates the motor power (output) factor, has increased the motor running wastage; The 3rd, need to increase the power factor benefit and taste device, its application still is very restricted.

The purpose of this utility model is at above-mentioned the deficiencies in the prior art part, and a kind of centrifugal contactor is provided, and it adopts centrifugal structure, when motor during near rated speed, relies on centrifugal force can make contact closure automatically, with the frequency-sensitive variable-resistance short circuit.

The technical scheme that realizes the utility model purpose is: a kind of centrifugal contactor, and it has a wheel disc that is fixed on the rotating shaft, fixes a central shaft on the wheel disc, and this axle is gone up and is equipped with fixed cover, spring and slip cap backward successively by front end.Be hinged with three centrifugal bars on the fixed cover, each centrifugal bar is 120 ° at a distance of angle.One end of its centrifugal bar is provided with centrifugal globe, and a side of centrifugal globe has the hanging scroll of protrusion.Cooperate with hanging scroll to be provided with the control hook, this hook is installed on the hook base by one, and its hook is fixed on the wheel disc.On its hook base of front of control hook, be provided with the hook adjusting pin; The back of hook is provided with a top spring.Be provided with a connecting plate between each centrifugal bar and slip cap, the two ends of this connecting plate are hinged with centrifugal bar and slip cap respectively.Be fixed with three armed levers on slip cap, each armed lever is 120 ° at a distance of angle, and the front end of this armed lever connects a connecting rod by a bearing pin, and the lower end of its connecting rod is fixed with the contactor moving contact, correspondingly with moving contact is fixed with stationary contacts on the shell of contactor.

The drawing of accompanying drawing is described as follows:

Fig. 1 is the utility model front view;

Fig. 2 is the A-A cross section view of Fig. 1.

Below in conjunction with accompanying drawing the utility model is further described:; Wheel disc 1 is fixed on the rotating shaft, the dish center fixation one central shaft 2, the axle 2 on by being nested with fixed cover 11, spring 12 and slip cap 13 behind the forward direction successively.Be hinged with three centrifugal bars 9 on the fixed cover 11, each centrifugal bar 9 is 120 ° at a distance of angle.One end of this centrifugal bar 9 is fixed with a centrifugal globe 6, and a side of ball 6 has the hanging scroll 7 of protrusion.Be equipped with control hook 5 with hanging scroll 7, hook 5 is installed on the hook base 3 by one, and hook base 3 is fixed on the wheel disc 1.In the front of hook 5, be provided with hook adjusting pin 8 in hook base 3, the back of hook 5 is provided with adjusts top spring 4.Be provided with connecting plate 10 between each centrifugal bar 9 and the slip cap 13, the two ends of this connecting plate 10 are hinged with centrifugal bar 9 and slip cap 13 respectively.Be fixed with three armed levers 14 on slip cap 13, each armed lever 14 is 120 ° at a distance of angle.The front end of this armed lever connects a connecting rod 16 by a bearing pin 15, and bar 16 lower ends are fixed with contactor moving contact 18, the corresponding stationary contacts 17 that is fixed with on the shell of contactor with moving contact.The contactor shell is fixed on the wheel disc 1.

This centrifugal contactor is configured on the wire wound asynchronous motor, can simplify its structure greatly, reduces equipment investment; Simultaneously can avoid causing the accident of burning motor, improve the reliability of equipment operation because of the fault of control appliance.

This centrifugal contactor also can be used on other equipment relevant with rotating speed control except that being used for the brushless frequency sensitive trheostat of short circuit.

Claims

1, a kind of centrifugal contactor is characterized in that: it has a wheel disc (1) that is fixed on the rotating shaft, fixes a central shaft (2) on the dish (1), and this axle (2) is gone up and is equipped with fixed cover (11), spring (12) and slip cap (13) backward successively by front end; Be hinged with three centrifugal bars (9) on the fixed cover (11), each centrifugal bar (9) is 120 ° at a distance of angle, and an end of this centrifugal bar is provided with centrifugal globe (6), and a side of ball (6) has the hanging scroll (7) of protrusion; Cooperate with hanging scroll (7) to be provided with control hook (5), hook (5) is installed on the hook base (3) by one, and hook base (3) is fixed on the wheel disc (1); In the front of hook (5), be provided with hook adjusting pin (8) in hook base (3), the back of hook (5) is provided with top spring (4); Be provided with connecting plate (10) between each centrifugal bar (9) and slip cap (13), the two ends of this connecting plate are hinged with centrifugal bar (9) and slip cap (13) respectively; On slip cap (13), be fixed with three armed levers (14), each armed lever (14) is 120 ° at a distance of angle, the front end of this armed lever connects a connecting rod (16) by a bearing pin (15), bar (16) lower end is fixed with contactor moving contact (18), the corresponding stationary contacts (17) that is fixed with on the shell of contactor with moving contact, the contactor shell is fixed on the wheel disc (1).