CN2375390Y

CN2375390Y - Spring stiffness adjustable electromagnetic vibrator

Info

Publication number: CN2375390Y
Application number: CN 99210273
Authority: CN
Inventors: 张胜田
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-05-16
Filing date: 1999-05-16
Publication date: 2000-04-26
Anticipated expiration: 2009-05-16

Abstract

The utility model relates to an electromagnetic vibrator with adjustable spring stiffness. A vibration system is composed of a movable iron core 20, and spring plates 5 and 9. By regulating the combination position of bottom plates 3 and 12 or the combination position of bottom plates 7 and 16, the stiffness of the spring plates 5 and 9 can be regulated, and a natural vibration frequency of the vibration system is consistent with a resonance frequency. The structure of the utility model is simple, and the utility model is suitable for batch production. Electromagnetic attracting force directly acts on a vibration motion, the vibration frequency is two times larger than the power frequency, parts have no mechanical friction, and a plurality of vibrators have synchronous vibration. The utility model can directly adopt a single phase AC power supply, and the utility model can vibrate for 6000 times per minute when 50Hz alternating current is adopted. The utility model is particularly suitable for dense vibration of concrete, and work efficiency can be obviously enhanced.

Description

The electromagnetic vibrator that spring rate is adjustable

The utility model is the adjustable electromagnetic vibrator of a kind of spring rate.

90223325.4 patent disclosure a kind of electromagnetic vibrator, mainly by moving iron core, fixed core, solenoid, compositions such as spring, moving iron core and the mutual corresponding setting of the magnetic pole of fixed core, leave the gap between the pole-face of two iron cores, solenoid is enclosed within on the core magnetic pole post, connect supporting by spring between moving iron core and the fixed core, moving iron core and spring are formed a vibrational system, when passing through pulsating current in the solenoid, two iron cores produce the electromagnetic attraction of pulsation mutually, moving iron core oscillating movement under the alternating action of electromagnetic attraction and spring potential energy, the condition of its optimal vibration is that the eigentone of vibrational system is consistent with the ripple frequency of electromagnetic attraction, produces resonance.In electromagnetic vibrator, the ripple frequency of electromagnetic attraction is by the decision of the ripple frequency of electric current, all is constant definite value generally; The eigentone of vibrational system is to determine by the rigidity of the quality of vibrational system and spring is common, wherein the fair of vibrational system is constant definite value, and the rigidity of spring is because in manufacture process, be subjected to multiple factor affecting, error is bigger, the product standard of general spring allows the rigidity error to reach 10% to 30%, therefore influences the eigentone of vibrational system of electromagnetic vibrator and the uniformity of resonant frequency, influences the quality of electromagnetic vibrator product.

The purpose of this utility model provides the adjustable electromagnetic vibrator of a kind of spring rate, by adjusting the rigidity of spring, makes the eigentone of vibrational system consistent with the ripple frequency of electromagnetic attraction, the shake product quality of device of raising electromagnetism.

The purpose of this utility model is achieved in that the electromagnetic vibrator that a kind of spring rate is adjustable, comprise moving iron core, fixed core, solenoid, connector, latch plate and adjusting backing plate etc., moving iron core and the mutual corresponding setting of the magnetic pole of fixed core, leave the gap between the magnetic pole strength of two iron cores, solenoid is enclosed within on the core magnetic pole post, moving iron core and fixed core connect supporting by connector by latch plate, moving iron core and latch plate are formed a vibrational system, when passing through pulsating current in the solenoid, produce the electromagnetic attraction of pulsation between two iron cores, moving iron core oscillating movement under the alternating action of electromagnetic attraction and spring potential energy, the eigentone that its optimal vibration condition is a vibrational system is consistent with the ripple frequency of electromagnetic attraction, produces resonance.Special character of the present utility model is: described latch plate is whole or overlap joint, the adjusting backing plate is housed between the faying face of the lap-joint of the connection place of connector and latch plate or latch plate and latch plate, regulating backing plate is adjustable along the position of long direction on latch plate, adjust the position of adjustable plate, promptly adjusted the stress length of latch plate, promptly adjust the rigidity of latch plate, thereby adjusted the eigentone of vibrational system.

Advantage of the present utility model is: 1. moving iron core directly connects supporting by latch plate with fixed core, does not have mechanical friction means, and is simple in structure, and manufacturing and maintenance are easily; 2. electromagnetic attraction directly acts on oscillating movement, the electric energy efficiency height; 3. power supply can directly adopt single-phase alternating current or the two-way power of chopping of single phase ac controllable silicon, and it is convenient to use; 4. because pulsation of current twice in each cycle of alternating current, so vibration frequency is 2 times of supply frequency, vibration frequency 100Hz when adopting the 50Hz alternating current, be per minute vibration 6000 times, under equal amplitude condition, frequency improves 2 times, and maximum velocity and maximum vibration power improve 4 times; 5. the phase place of oscillating movement is by the phase decision of electromagnetic attraction pulsation, when many electromagnetic vibrators adopt the same-phase current works, can realize many electromagnetic vibrator synchronous vibrations.

The drawing of accompanying drawing is described as follows:

Fig. 1 is the structural representation of an example of the utility model;

Fig. 2 be example of the utility model partly cut open figure;

Fig. 3 is an A-A profile among Fig. 2;

Fig. 4 regulates the adjusting position schematic diagram of backing plate in the latch plate connection place;

Fig. 5 regulates the adjusting position schematic diagram of backing plate in latch plate lap-joint;

Fig. 6 is that latch plate is the schematic diagram of U-shaped plate.

Being described as follows of each label among the figure:

The 1-securing member, the 2-connector, 3-regulates backing plate, the 4-securing member, 5-latch plate, 6-pressing plate, the 7-backing plate, 8-pressing plate, 9-latch plate, the 10-pressing plate, the 11-pressing plate, 12-regulates backing plate, the 13-connector, 14-securing member, 15-pressing plate, the 16-backing plate, 17-pressing plate, 18-securing member, the 19-fixed core, 20-moves iron core, the 21-solenoid, 22-spacer Board position leeway, 23-latch plate lap position, 24-spacer Board position, 25-spacer Board position leeway, 26-connects backing plate, and 27-connects the adjustable leeway of backing plate, 28-U shape latch plate, 29-connector coupled position.

Be described in detail embodiment of the present utility model in conjunction with the accompanying drawings:

Referring to Fig. 1, Fig. 2, Fig. 3, Fig. 4, the moving iron core 20 of the electromagnetic vibrator that this spring rate is adjustable and fixed core 19 are repeatedly adorned by " mountain " font silicon steel sheet and are formed, the magnetic pole of two iron cores is corresponding mutually to be provided with, leave the gap between the magnetic pole strength of two iron cores, electromagnetic wire Figure 21 is enclosed within on the core magnetic pole, fixing with fixed core 19, connect to support in bilateral symmetry by two pairs of springs between moving iron core 20 and the fixed core 19 and form the direct drive type electro magnetic and close vibrational system.Its every pair spring all is by

latch plate

5 and 9 parallel interval, and two ends are respectively by securing

member

4 and 18, pressing plate 6,8 and 15,17, and backing plate 7 and fastening overlap joints such as 16 constitute.Moving iron core 20 and fixed core 19 are respectively by

connector

2 and 13, securing

member

1 and 14, pressing plate 10 and the 11 fastening middle parts that are connected in latch plate 5 and latch plate 9.Be equipped with between the faying face of latch plate 5 and connector 2 and latch plate 9 and connector 13 and regulate backing plate 3 and regulate backing plate 12, regulating backing plate 3 and 12 can change the position along the direction of the length of latch plate 5 and 9.Adjust the position of regulating backing plate 3 or 12, can change the stress length of

latch plate

5 or 9, change the rigidity of

latch plate

5 or 9, thereby the eigentone that can adjust vibrational system is consistent with the electromagnetic attraction ripple frequency, eliminate the influence of the spring rate error of manufacture process generation, be convenient to the standardization batch process and improve the quality.For the ease of the error of control manufacture process,

latch plate

5 and 9 is straight.

Referring to Fig. 5, the

backing plate

7 and 16 between the faying face of latch plate two ends lap-joint is to regulate backing plate.

Referring to Fig. 6, latch plate 28 is U-shaped plates of single-piece, connects with moving iron core and fixed core respectively by connecting backing plate 26 at the both ends of U-shaped latch plate 28, and the position that connects backing plate is adjustable.

The utility model in force, the cross sectional shape of latch plate can be rectangle or circular or oblate etc.

The utility model in force, the power supply of employing can be common single-phase alternating current, also can be single phase ac bidirectional triode thyristor power of chopping, electric current is interrupted, and does not have electromagnetic attraction during moving iron core reseting movement, improves electric energy efficiency.

The utility model uses on-the-spot different voltage drop in order to adapt in force, can adopt solenoid classification tap or controllable silicon voltage stabilizing technique to regulate curtage, keeps permanent power work.

Can be to connect the Direct Action Type of supporting or the clapper-type that supports in one-sided connection in both sides between moving iron core of the utility model and the fixed core.

The utility model also should dispose guard shield, cable entry and solenoid tapping device or dedicated power supply apparatus etc. in force.

The utility model is applicable to concrete compaction vibration, vibratory sieve, vibrating feed, vibration batch mixing, vibration material delivering etc.

Claims

1. electromagnetic vibrator that spring rate is adjustable, comprise moving iron core, fixed core, solenoid, connector, latch plate and adjusting backing plate etc., moving iron core and the mutual corresponding setting of the magnetic pole of fixed core, leave the gap between the magnetic pole strength of two iron cores, solenoid is enclosed within on the core magnetic pole post, the connector that moving iron core and fixed core pass through respectively separately connects supporting by latch plate, moving iron core and latch plate are formed a vibrational system, it is characterized in that: described latch plate is whole or overlap joint, between the faying face of the lap-joint of the connection place of connector and latch plate or latch plate and latch plate, the adjusting backing plate is housed, regulating backing plate is adjustable along the binding site of the long direction of latch plate, adjust the position of regulating backing plate, promptly adjusted the rigidity of latch plate.

2. the adjustable electromagnetic vibrator of a kind of spring rate according to claim 1 is characterized in that: described latch plate is straight or U-shaped.

3. the adjustable electromagnetic vibrator of a kind of spring rate according to claim 1 is characterized in that: the cross section of described latch plate is rectangle or circle or oblate.

4. the adjustable electromagnetic vibrator of a kind of spring rate according to claim 1 is characterized in that: connecting supporting by connector by latch plate between described moving iron core and the fixed core is to connect the Direct Action Type of supporting in the iron core both sides or the clapper-type that supports in the one-sided connection of iron core.