Two plastid Near resonance oscillating sieves that a kind of screen frame separates with sifting bed
The present invention relates to the vibration screening device technical field, the two plastid Near resonance oscillatings sieve that separates with sifting bed of a kind of screen frame particularly, it is a kind of vibrating screen.
Vibrating screen is widely used in the screening of various materials, and the sifting bed effective area of maximum model commonly used reaches 3m * 7.2m.The vibrating screen horizontal span is large, and the equipment weight needs larger power, to structural strength, requires very high.Its common version is that motor is installed on ground or fixed support, by transmission device, transmission of power is installed on to the eccentric vibrator on screen box, and two groups of eccentrics are realized synchronously by mechanical connection.
Middle-size and small-size linear vibrating screen can directly be installed on two shock electric machines that carry eccentric block on the crossbeam of screen box, the motor synchronizing running.
Utilize the Near resonance oscillating sieve of resonance principle design can greatly reduce motor power (output).Take 3m * 7.2m linear vibrating screen as example, in the prior art, the off-resonance sieve needs 2 22kW or above motor, and the Near resonance oscillating sieve only needs the motor of two 10kW left and right.
Near resonance oscillating machinery comprises elemental body machinery and two plastid machinery.Elemental body Near resonance oscillating machinery is large due to ground is impacted, and is only applicable to mini-plant.Two plastid Near resonance oscillating machinery is energy-conservation with it, ground is impacted to little characteristics is applied to the equipment such as large-scale conveying, feed, screening.These pairs plastid Near resonance oscillating machinery has a common ground, be exactly one of them plastid be working body, for delivery of or the screening, another plastid is excitor, the plastid that serves as excitor can be lower plastid, can be also upper plastid.
Existing two plastid screening plant, one of them plastid is the vibrator of simple function.The simple function that exciting is only arranged due to excitor, so this excitor is a quality " burden ", weight reaches 100%-30% of the weight of serving as the main frame plastid.
Simultaneously, the oscillation intensity of excitor is relevant with respect to the mass ratio of main frame with it.When the quality of excitor hour, will bear larger oscillation intensity; If reduce the oscillation intensity of vibrator, just need larger quality.Generally in specific design, the quality of excitor is less than main frame, and its oscillation intensity is greater than main frame.
The main body of tradition vibratory sieve structurally is divided into screen frame and sifting bed two parts, on sifting bed, mounted sieve is for screening, and screen frame is used to form the solid space of screening operation, and its side plate prevents that material from spilling, screen frame and sifting bed are generally the one of rigidity, and this main body is called screen box.In the Near resonance oscillating sieve, screen box is a plastid in two plastid structures, and another plastid is only extra additional structure in order to realize Near resonance oscillating, has caused the rising of installation cost.
Summary of the invention
The object of the invention is to overcome the shortcoming of prior art, the two plastid Near resonance oscillatings that provide a kind of and reduce costs, improve structural strength, increase the screening volume, screen frame separate with sifting bed sieve.
Purpose of the present invention is achieved through the following technical solutions: two plastid Near resonance oscillating sieves that a kind of screen frame separates with sifting bed, it comprises sifting bed and the screen frame of separation, between sifting bed and screen frame, be provided with main vibration spring, sifting bed is installed on ground by isolation spring, and shock electric machine is installed on screen frame.
Described screen frame consists of with the crossbeam that is connected described side plate side plate, on side plate, is provided with Connection Block, and main vibration spring is arranged between Connection Block and sifting bed, and shock electric machine is installed on crossbeam.
Described sifting bed comprises framework and is installed on the sieve plate on framework.
Between described Connection Block and sifting bed, also be provided with leaf spring, the angle of main vibration spring and horizontal plane is °, and leaf spring is perpendicular to main vibration spring, and main vibration spring is an end with leaf spring and is connected with sifting bed, and the other end is connected with Connection Block.
The side that described sifting bed is positioned at the side plate of screen frame is provided with the upper edge panel parallel with side plate, and the lower end of the side plate of screen frame is positioned at the bottom of upper edge panel upper end.
Between described upper edge panel and side plate, have gap, the below in gap is provided with the blend stop that is fixedly arranged on the upper edge panel side, and the lower limb of upper edge panel is coated with rubber strip.
The present invention has the following advantages: the invention provides a kind of pair of plastid inertia-type Near resonance oscillating sieve, utilize the screen frame and the sifting bed that separate to form two plastid systems, screen frame is except installing shock electric machine, bearing the vibrator effect of resonator system, it itself is the screen frame part of traditional screen box, one of the part of screen box screen frame is separated as excitor, so just avoided the independent excitation body of " burden ".Screen frame, except the effect with excitor, also has with sifting bed and jointly forms the screening space, prevents the effect that material leaks outside and spatters outward.Compare simultaneously existing resonance screens at modifier volume not, even reduce under the prerequisite of volume, improved the material volume.
And in prior art, independent vibrator is a kind of extra " burden " quality with respect to traditional vibratory sieve, if its weight is little, the oscillation intensity of that vibrator can be very large, easily cause mechanism collapse, if will reduce oscillation intensity, just need larger weight, consume more steel, and the present invention has well solved this contradiction.Utilize the part " screen frame " of screen box to be used as excitor, there is no extra metal consumption, reach under the same design functional parameter, the overall greatly less purpose of steel that consumes, and using screen frame as vibrator, itself have enough quality, so oscillation intensity is less, this has just further reduced power of motor, can directly be installed on the shock electric machine that carries eccentric block on crossbeam, designs simplification, strength reliability is high, has optimized Structural Strength Design.Take 3m * 7.2m linear vibrating screen as example, if the mass ratio of screen frame and sifting bed is 1:1, only need the shock electric machine of two 6～7kW.Under identical sieving area and vibration parameters, its complete machine weight ratio tradition vibrating screen reduces by 30%～40%, than the Near resonance oscillating straight line shaker that " burden " quality is arranged, reduces by 15～25%.
The present invention creatively is separated into two plastids by screen frame and sifting bed, with main vibration spring, connects, and forms two plastid systems, when not increasing " burden " quality, reaches the design of two plastid Near resonance oscillatings.Power of motor is little, and complete machine is lightweight, and is little to the ground impact, meets the designing requirement of heavy vibratory sieve.
The accompanying drawing explanation
Fig. 1 is structural representation of the present invention
Fig. 2 is the fit structure schematic diagram of side plate and upper edge panel
Fig. 3 is another kind of structural representation of the present invention
In figure, 1-sifting bed, 2-screen frame, 3-side plate, 4-crossbeam, 5-Connection Block, 6-main vibration spring, 7-leaf spring, 8-isolation spring, 9-shock electric machine, 10-framework, 11-end face baffle plate, 12-side shield, 13-upper edge panel, 14-blend stop, 15-rubber strip.
The specific embodiment
The present invention will be further described below in conjunction with accompanying drawing, and protection scope of the present invention is not limited to the following stated:
As shown in Figure 1, two plastid Near resonance oscillating sieves that a kind of screen frame separates with sifting bed, it comprises sifting bed 1 and the screen frame 2 of separation, screen frame 2 is arranged at the top of sifting bed 1, the common formation screen box of sifting bed 1 and screen frame 2, between sifting bed 1 and screen frame 2, be provided with main vibration spring 6, sifting bed 1 is installed on ground by isolation spring 8, and shock electric machine 9 is installed on screen frame 2.
Described screen frame 2 consists of the crossbeam 4 that two side plates 3 and two ends are connected respectively two side plates 3, side plate 3 is arranged at sifting bed 1 edge parallel with sifting bed 1 edge, and side plate 3 is perpendicular to sifting bed 1, the outer surface of side plate 3 is provided with Connection Block 5, main vibration spring 6 and leaf spring 7 are arranged between the respective side of Connection Block 5 and sifting bed 1, and shock electric machine 9 is installed on crossbeam 4.Two 3 of side plates are equipped with a plurality of crossbeams 4, and shock electric machine 9 can be installed on same crossbeam 4, also can be installed on respectively on different crossbeams 4.
Described sifting bed 1 comprises framework 10 and is installed on the sieve plate on framework 10.Sifting bed 1 has feed end and discharge end, sifting bed 1 is positioned on the framework 10 of feed end and is provided with the charging baffle plate, the charging baffle plate comprises the end face baffle plate 11 that is arranged at framework 10 ends and the side shield 12 that is arranged at end face baffle plate 11 both sides, end face baffle plate 11 both sides are provided with a side shield 12, side shield 12 is arranged at a side of homonymy side plate 3, be that homonymy side shield 12 and side plate 3 misplace in the vertical direction, side shield 12 1 ends are fixedly connected with end face baffle plate 11, the other end of side shield 12 and side plate 3 superpositions, side shield 12 and end face baffle plate 11 surround charging aperture.The length of the length of side plate 3 and framework 10 is suitable, the length that side shield 12 extends along framework 10 edges is much smaller than the length of side plate 3, take discharge end with respect to the position of feed end as before, the front end superposition of the rear end of side plate 3 and side shield 12, the front end of side plate 3 exceeds framework 10.Above-mentioned superposition refers to that the front end of side shield 12 is positioned at the front portion of side plate 3 rear ends, because side shield 12 and side plate 3 are not positioned at same plane, dislocation in the vertical direction, thereby presents the structure of superposition.
As shown in Figure 1 and Figure 2, the side that described sifting bed 1 is positioned at the side plate 3 of screen frame 2 is provided with the upper edge panel parallel with side plate 3 13, and the lower end of the side plate 3 of screen frame 2 is positioned at the bottom of upper edge panel 13 upper ends.Upper edge panel 13 can be positioned at side shield 12 homonymy of screen frame 2, thereby the rearward end of upper edge panel 13 is connected with side shield 12, and the leading section of upper edge panel 13 extends to the front end of framework 10.Upper edge panel 13 also can be positioned at the heteropleural of screen frame 2 with side shield 12, the rearward end of upper edge panel 13 is concordant with the rearward end of side plate 3, and the leading section of upper edge panel 13 extends to the front end of framework 10.
Described main vibration spring 6 is 45 ° with the angle of horizontal plane, and leaf spring 7 is perpendicular to main vibration spring 6, and main vibration spring 6 is an end with leaf spring 7 and is connected with sifting bed 1, and the other end is connected with Connection Block 5.Leaf spring 7 has limited the motion at its length direction, namely perpendicular to the motion of direction of vibration, so no matter the resultant direction of motor how, the final straight-line oscillation that forms along main vibration spring 6 length directions.The oscillation trajectory of screen frame 2 and sifting bed 1 is with horizontal discharging direction, to become the straight-line oscillation track of 40 °～55 °.
between described upper edge panel 13 and side plate 3, has gap, the below in gap is provided with the blend stop 14 that is fixedly arranged on upper edge panel 13 sides, the lower limb of upper edge panel 13 is coated with rubber strip 15, blend stop 14 is be used to blocking material, prevent that material from entering in the gap between upper edge panel 13 and side plate 3, this structure can either guarantee that both have relative motion, but guarantee that the material that is sized remains in screen frame 2 and the formed space of sifting bed 1, do not produce and leak outside, rubber strip 15 plays protection and cushioning effect, avoid intermetallic direct contact or friction, reduce device operation noise.
As shown in Figure 1, described shock electric machine 9 can level be installed, also can be as shown in Figure 3, and the mounting plane of described shock electric machine 9 and the angle of horizontal plane are 45 °, namely the direction of vibration of shock electric machine 9 is parallel with the axis of main vibration spring 6.The oscillation trajectory of system is 45 straight paths of spending that tilt.During shock electric machine 9 levels installation, making a concerted effort of shock electric machine 9 is vertical direction, and due to the helical spring that tilts to install and the guiding of leaf spring 7, sifting bed 1 and screen frame 2 form the vibration of 45 ° of inclinations.And shock electric machine 9 tilts 45 ° while installing, the also corresponding inclination of the mounting rail of motor, like this, motor be 45 ° of inclinations at the very start with withing joint efforts, make screen frame 2 stressed better.
Because the screen frame 2 as excitor is parts of screen box, so the oeverall quality of of the present invention pair of plastid Near resonance oscillating sieve is starkly lower than other Near resonance oscillating sieve.Because the screen frame 2 as excitor has larger quality with respect to sifting bed 1, so when sifting bed 1 reached enough oscillation intensity, the oscillation intensity of screen frame 2 was smaller, Structural Strength Reliability is high, meets the designing requirement of heavy vibratory sieve.And the quality of the excitor of other Near resonance oscillating sieve can not be too large, will consume more steel after too large, so the oscillation intensity of excitor is generally all larger than the oscillation intensity of screen box, Intensity Design is harsher.
The present invention except have general Near resonance oscillating mechanical motor little, save the energy, ground impacted the advantage such as little, also have advantages of that steel consumption is few, Structural Strength Reliability is high, be suitable for the application of heavy vibratory sieve.