CN2216735Y - Back blowing type double channel grain cleaning and separating equipment of mini combine - Google Patents

Abstract

The utility model relates to back blowing type double wind-channel grain cleaning and separating equipment of a mini combine and is characterized in that a single wind-channel blower in existing cleaning and separating equipment is changed into a double wind-channel blower, an original wind channel serves as an upper wind channel, a lower wind channel is additionally arranged below the upper wind channel, the air stream from an outlet of the lower wind channel is directly blown in the space between the tail of a vibration sieve and a wind deflect adjusting plate, an adapter plate at the tail of the sieve and a wind deflector compose a convergent air-stream passage, the included angle between the wind deflect adjusting plate and the horizontal plane is adjustable within 55 DEG-75 DEG, and the mounting angle of an inlet for original blower blades is changed from 30 DEG tip-back into 60 DEG tip-back. Large impurities and seeds pushed out of the tail of the sieve are carried out second cleaning and separation; therefore, the cleaning loss rate is less than and equal to 0.5%, and the trash content is less than and equal to 2%.

Description

The two air channels of baby combine after-blow formula cleaning plant

The utility model belongs to combine.

On combine, generally adopt blower fan to add the cleaning plant of double-deck screen shale shaker, wherein blower fan is single air channel structure.In order to guarantee the service behaviour of cleaning plant, that is the requirement of percent of loss and percentage of impurity, the assorted surplus recovering mechanism of a cover also will be added.For baby combine, suspension type small combine particularly, because of being subjected to the influence of mating power, general structure configuration etc., be difficult to additional assorted surplus recovering mechanism, therefore, the cleaning plant of domestic existing baby combine can not satisfy the combination property requirement of percentage of impurity and percent of loss comprehensively.Have in design at first guarantee percent of loss, make percentage of impurity higher, percentage of impurity 〉=4% according to statistics, can not satisfy national standard is percentage of impurity≤2% requirement.Though the domestic experimental study that the cleaning plant of two air channels blower fan is also arranged, " component test research is cleaned in two air channels " literary composition of on " agricultural mechanical journal " third phase in 1984, delivering as Jin Chenglie etc.The outlet in its additional air channel places the front upper part of top sieve, and air-flow directly blows to the cylinder emersion object that will enter vibratory sieve that shuttle board is released, and its objective is in order to alleviate the compass screen surface load, improves the ability to work of vibratory sieve.Be applicable to the cleaning plant of big feed quantity combine.For the final sorting performance that guarantees, still need add assorted surplus recovering mechanism.

The purpose of this utility model is to provide a kind of blower fan that is adapted to baby combine to add the cleaning plant of double-deck screen shale shaker, does not need attached assorted surplus recovering mechanism, can guarantee under cleaning loss percentage is not more than 0.5% prerequisite percentage of impurity≤2% effectively.

The utility model is achieved in that and changes the single air channel blower fan in the existing cleaning plant into two air channels blower fan, original single duct dimension and air channel and the mutual configuration relation of vibratory sieve are constant, the ducting outlet air velocity is constant, with this as upper air duct, additional again lower air duct below being in the wind, it is 1/3 of upper air duct that lower air duct goes out open height, the exit flow of additional lower air duct directly blows to the space between vibratory sieve tail end and the wind-guiding adjustable plate, guarantee that this space air velocity is 4.8～5.2m/s, and under the effect of wind-guiding adjustable plate, obtain suitable airflow direction.Tail end keyset and wind deflector are formed the gas channel of a convergence, and wind-guiding adjustable plate and horizontal plane angle are adjustable between 55 °～75 °.Former fan blade stagger angle is become 60 ° of hypsokinesis by 30 ° of hypsokinesis, and upper air duct goes out open height 90mm lower air duct, and to go out open height be 30mm, and the ratio of upper and lower ducting outlet area is 3: 1.

The utility model has the advantages that only needs on the basis of former cleaning plant, and single air duct machine is changed into two air channel blower fans and increases blade hypsokinesis angle, sets up gas channel of drying upward of a wind-guiding adjustable plate formation in the tail end exit and gets final product.Therefore, its structure is very simple, does not change the overall arrangement of cleaning device of small-sized combine harvester, does not increase the complexity of structure.Because need not add assorted surplus recovering mechanism, so the functional reliability height, power consumption changes not quite simultaneously, does not influence the power coupling of complete machine.

Accompanying drawing is a structural representation of the present utility model.

Further specify structure of the present utility model and working condition below in conjunction with accompanying drawing.

By threshing cylinder down the isolated seed of concave grate and the mixture of impurity, at top sieve 5, down sieve 6 and the effect lower edge compass screen surface of upper air duct 7 exit flows move to Way out.Light impurity can be blown out outside the machine by air-flow in motion process, and seed then passes upper and lower sieve aperture gradually along with moving and falls in the tanker 9.Big impurity has and passes sieve aperture on a small quantity and fall, and major part then continues to move backward along last compass screen surface always.Pass the big impurity that sieve aperture drops down onto down compass screen surface, less because of following sieve aperture, generally can not pass down sieve aperture and fall into tanker, also continue along following compass screen surface to the outlet campaign.Because seed can not all separate thoroughly, also can be mixed with a small amount of seed in the big impurity that tail end is released on the compass screen surface total length.How removing the big impurity of releasing from upper and lower tail end and don't making outside the seed effusion machine is exactly key of the present utility model.By the air-flow that lower air duct 8 blows out, directly blow under between tail end and the wind-guiding adjustable plate 1.The following air-flow that moves the compass screen surface upper and lower that sieves in edge that blows out with upper air duct 7 converges, and air velocity behind the tail end is increased to 4.8～5.2m/s.Air communication after converging is crossed the passage that is formed by wind-guiding adjustable plate 1 and tail end keyset 3 and is moved to the back upper place.Airflow direction can be regulated between 55 °～75 ° with wind-guiding adjustable plate 1.The gas channel that big impurity of releasing from upper and lower tail end and seed enter this high wind speed, the difference of coefficient because impurity and seed float, under the mating reaction of aerodynamic force and gravity, big impurity is outside machine is once blown out in the back upper place motion, or run on the wind-guiding adjustable plate 1, blown out outside the machine by air-flow along the wind-guiding adjustable plate again.Seed is then to back lower place motion, falls into tanker 9 again after running into wind-guiding adjustable plate 1 or wind deflector 2.The top sieve exit adds a tail end keyset 3.Its effect is that (1) forms the gas channel of restraining with wind-guiding adjustable plate 1, guarantees that channel exit has enough air velocities to blow away the big impurity of releasing from last tail end; (2) motion of retardance top sieve exit seed increases seed by the chance that sieve aperture separates, and avoids seed to cross keyset as far as possible and enters the high velocity air passage and cause damage.In top sieve tail end bottom one grain guard board 4 is set, it mainly acts on is that the seed that will fall by the top sieve sieve aperture keeps off back sieve down, avoids this part seed first motion to wind-guiding adjustable plate place, with the loss that reduces to cause.Fan blade adopts BI to install, and the inlet established angle is 60 °, blade external diameter Φ 300, when rotation speed of fan is 1150r/min, upper air duct outlet wind speed is 9.5～10m/s, and lower air duct outlet wind speed is 10.5～11m/s, can guarantee the air velocity that the work of cleaning is required.

Claims (1)

1, the two air channels of a kind of baby combine after-blow formula cleaning plant, the single air channel blower fan that it is characterized in that having in the cleaning plant changes two air channels blower fan into, former air channel is as upper air duct, additional again lower air duct below being in the wind, it is 1/3 of upper air duct that lower air duct goes out open height, the exit flow of additional lower air duct directly blows to the space between vibratory sieve tail end and the wind-guiding adjustable plate, guarantee that this space air velocity is 4.8～5.2m/s, tail end keyset and wind deflector are formed the gas channel of a convergence, and wind-guiding adjustable plate and horizontal plane angle are adjustable between 55 °～75 °; Former fan blade stagger angle is become 60 ° of hypsokinesis by 30 ° of hypsokinesis, and upper air duct goes out open height 90mm, and it is 30mm that lower air duct goes out open height, and the ratio of upper and lower ducting outlet area is 3: 1.

Images