CN2345292Y

CN2345292Y - Vibration screen driven by triaxial forcing synchronous ellipse equal thick

Info

Publication number: CN2345292Y
Application number: CN 98231770
Authority: CN
Inventors: 叶恒棣
Original assignee: CHANGSHA METALLURGICAL DESIGN RESEARCH INST MINISTRY OF METALLURGICAL INDUSTRY
Current assignee: Zhongye Changtian International Engineering Co Ltd
Priority date: 1998-12-04
Filing date: 1998-12-04
Publication date: 1999-10-27
Anticipated expiration: 2008-12-04

Abstract

The utility model relates to a vibration screen which is suitable for being widely applied to metallurgical industries, mine industries, coal industries, etc. The utility model has the primary structure that the vibration screen is provided with a screen box comprising a screen frame (4) and a screen surface (5), wherein, the relationship among included angles a 3, a 2 and a 1 formed by the screen surface (5) with a three-section structure and a horizontal surface is that the a 3 is larger than the a 2 which is larger than the a 1, and the angle ranges of the a 3, the a 2 and the a 1 are respectively 10DEG-30DEG, 5DEG-20DEG and 2DEG-10DEG; three sets of eccentric vibrators (1) (2) (3) are installed on one side plate of the screen frame (4), a gear synchronizer (6) driven by an electric motor (7) is connected with the vibrators by a free joint (8) and has the same rotating speed as those of the vibrators, the rotating direction of the middle vibrator (2) is opposite to the rotating directions of the vibrators (1) (3), and a shaft center connecting line of the three sets of vibrators (1) (2) (3) is parallel to a middle-section screen surface. The utility model has the characteristics of large material throughput, high screening efficiency, etc.

Description

Three drivings force synchronous oval-shaped equal-thickness vibrating screen

The utility model relates to a kind of vibratory sieve, further is meant stock grading, the dehydration of industries such as being widely used in metallurgy, mine, coal, building materials, the vibratory sieve of de-mediated operation.

Existing vibratory sieve mostly is single shaft (promptly single group vibrator) or twin shaft (i.e. two groups of vibrators) drives, and oscillation trajectory mostly is circle or straight line.Even the employing screening with constant bed thickness that has, its oscillation trajectory also is to be circular motion or rectilinear motion.Material is that stifled sieve phenomenon then often appears in viscous material and difficult screening material.The vibrator bearing load is big, the life-span short, the skewness of exciting force on screen frame, and is stressed unreasonable, influences the strength and stiffness of screen frame.

The purpose of this utility model provides a kind of three drivings and forces synchronous oval-shaped equal-thickness vibrating screen, can improve the screening efficiency and the treating capacity of material, improves vibrational state and screen frame is stressed, improves the service life of bearing and screen frame.

The technical solution of the utility model is, described vibratory sieve has the screen box that comprises screen frame and compass screen surface, the flexible support component in screen box bottom, its design feature is that described compass screen surface is a three-stage structure, these three sections compass screen surfaces successively with horizontal plane angle α ₃, α ₂, α ₁Between relation be α ₃＞α ₂＞α ₁, and α ₃, α ₂, α ₁Angular range be respectively 10 °-30 °, 5 °-20 °, 2 °-10 °, three groups of eccentric-type vibrators are installed on the side plate of screen frame, place screen frame one side and link with the rotating shaft of described three groups of vibrators respectively through corresponding universal joints by three shafts of electric motor driven gear synchronized, each is organized in the vibrator and also connects with universal joint between the vibrating mechanism of biside plate, it is opposite with the direction of rotation of the vibrator of its both sides with the direction of rotation of identical rotating speed rotation and middle one group of vibrator that the gear synchronized drives described three groups of vibrators, and the axial connecting line of three groups of vibrators is parallel with the interlude compass screen surface.

Make below in conjunction with accompanying drawing and to further specify.

Description of drawings:

Fig. 1 is the structural representation (not drawing the gear synchronized) of facing of the present utility model;

Fig. 2 is the plan structure schematic diagram;

Fig. 3 is gear synchronized and the motor a kind of example structure to its driving;

Fig. 4 is gear synchronized and the motor another kind of example structure to its driving.

In the drawings:

1-vibrator 2-vibrator 3-vibrator 4-screen frame

5-compass screen surface 6-gear synchronized 7-motor 8-universal joint

9-distributing device 19-universal joint

By Fig. 1 and Fig. 2 as can be known, the utility model has the screen box that comprises screen frame (4) and compass screen surface (5), the flexible support component in screen box bottom, its design feature is, described compass screen surface (5) is three-stage structure, these three sections compass screen surfaces (5) successively with horizontal plane angle α₃、α ₂、α ₁Between relation be α₃＞α ₂＞α ₁, and α₃、 α ₂、α ₁Angular range be respectively 10 °-30 °, 5 °-20 °, 2 °-10 °, three groups of eccentric-type vibrators (1) (2) (3) are installed on the side plate of screen frame (4), three shafts of the gear synchronous device (6) that places screen frame (4) one sides and driven by motor (7) link with the rotating shaft of described three groups of vibrators (1) (2) (3) respectively through corresponding universal joints (8), each is organized and also uses universal joint (19) to connect in the vibrator between the vibrating mechanism of biside plate, it is opposite with the direction of rotation of the vibrator (1) (3) of its both sides with the direction of rotation of identical rotating speed rotation and middle one group of vibrator (2) that gear synchronous device (6) drives described three groups of vibrators (1) (2) (3), the direction of rotation of vibrator (1) (3) is identical, and the axial connecting line of three groups of vibrators (1) (2) (3) (namely becomes α with horizontal plane with the interlude compass screen surface₂The compass screen surface of angle) parallel. The described resilient support members of screen box bottom can adopt spring damping supporting construction or the two-stage vibration isolation device of prior art. Gear synchronous device (6) places a side of screen box, a side (left side) as shown in Figure 2 or its relative opposite side (right side). A kind of practical structures of gear synchronous device (6) is, three gears such as Fig. 3 or side shown in Figure 4 Formula engagement, motor (7) be when the bel-drivenn mode drives idler gear as shown in Figure 3, then its two side gear Rotation direction and the direction of rotation of idler gear; When needs during than large driving force, can adopt shown in Figure 4 Drive its two side gear and make its direction of rotation identical with two motors, the difference side that then realizes equally idler gear To rotation. Gear synchronous device (6) also can adopt the structure of other prior art with same effect. Described Each organize vibrator by be installed in bearing block on the screen frame side plate, be contained in bearing in the described bearing block and rotating shaft, by turning to The eccentric block of axle driven rotary forms, and eccentric block (as shown in Figure 2) all is housed on the biside plate of screen frame, and every side The described eccentric block of the symmetrical installation of the two sides of plate or one side. The off-centre of described three groups of vibrators (1) (2) (3) Piece is designed to its eccentric angle (being the mechanical fixed position of eccentric block in its rotating shaft) and eccentric block quality is adjustable Whole.

Design principle of the present utility model is that the power of motor (7) passes to by gear synchronous device (6) Three groups of vibrators (1) (2) (3), the eccentric block of these three groups of vibrators (1) (2) (3) are at a high speed The coherence masterpiece that rotation produces is that exciting force makes screen box form stable elliptic vibration track. Material is by Fig. 1 institute The distributing device that shows (9) enters compass screen surface (5), because compass screen surface (5) each section inclination angle (α₃、α ₂、α ₁) Difference presents different vibration parameters, and material obtains different transporting velocity and vibrational state at compass screen surface, Basically keep the equal thickness screening in the compass screen surface length range, optimized the screening process of material; Because reasonably oval Oscillation trajectory and rational vibrational state, material plug-hole phenomenon greatly reduces, and has improved treating capacity and screening efficiency.

As known from the above, the utility model is that a kind of Three-axis drive forces synchronous ellipse isopachous vibrating screen, and it significantly changes Be apt to conveying, layering and the saturating sieve of material, optimized screening process, improved treating capacity and the screening efficiency of material, Also significantly reduce viscous material and difficult screening materials carrying to the plug-hole phenomenon of compass screen surface, eliminated feeding (peak value) ripple Moving impact to vibrational system and mass transport, screening, synchronized has improved the stability of vibrational system and has made vibration Parameter becomes selectable. The utility model has alleviated the load of single vibrator bearing, has improved bearing and has used the longevity Order, improved the stress of screen frame, improved the strength and stiffness of screen frame. Described Three-axis drive produces screen box The elliptic motion that physiology is thought, and elliptical orbit adjustable (adjusting eccentric block relative angle and eccentric block quality), this is The not available technical characterictic of prior art can be selected desirable oscillation trajectory according to actual material situation at present.

Embodiment: according to the vibratory sieve (selecting motor shown in Figure 3 type of drive for use) of the utility model of accompanying

drawing

1,2,3 and said structure to the gear synchronized, adopt the compass screen surface (5) of rich chromium cast iron material to be of a size of 3000 * 9000mm, classification point 5mm, screen angle (α ₃, α ₂, α ₁) be 15 °, 10 °, 5 °, amplitude: major axis 8-10mm, minor axis 3-5mm; Vibration frequency 800r/min, the material treating capacity is 350t/h, and screening efficiency is greater than 75%, and motor power (output) is 75kw.The elasticity of described screen box bottom is propped up and held in both hands element is spring.

Claims

1, a kind of three drivings force synchronous oval-shaped equal-thickness vibrating screen, the screen box that comprises screen frame (4) and compass screen surface (5) is arranged, the flexible support component in screen box bottom, its design feature is, described compass screen surface (5) is a three-stage structure, these three sections compass screen surfaces (5) successively with horizontal plane angle α ₃, α ₂, α ₁Between relation be α ₃＞α ₂＞α ₁, and α ₃, α ₂, α ₁Angular range be respectively 10 °-30 °, 5 °-20 °, 2 °-10 °, three groups of eccentric-type vibrators (1) (2) (3) are installed on the side plate of screen frame (4), three shafts of the gear synchronized (6) that places screen frame (4) one sides and driven by motor (7) link with the rotating shaft of described three groups of vibrators (1) (2) (3) respectively through corresponding universal joints (8), each is organized and also uses universal joint (19) to connect in the vibrator between the vibrating mechanism of biside plate, it is opposite with the direction of rotation of the vibrator (1) (3) of its both sides with the direction of rotation of identical rotating speed rotation and middle one group of vibrator (2) that gear synchronized (6) drives described three groups of vibrators (1) (2) (3), and the axial connecting line of three groups of vibrators (1) (2) (3) is parallel with the interlude compass screen surface.

2, three drivings according to claim 1 force synchronous oval-shaped equal-thickness vibrating screen, it is characterized in that, described vibrator (1) (2) (3) by bearing block, be contained in bearing, rotating shaft in the described bearing block, form by the eccentric block of rotating shaft driven rotary.