CN201733638U

CN201733638U - Novel threshing concave board sieve

Info

Publication number: CN201733638U
Application number: CN2010202252305U
Authority: CN
Inventors: 杨仲雄; 高福强
Original assignee: Lion Agricultural Equipment Co Ltd
Current assignee: Lion Agricultural Equipment Co Ltd
Priority date: 2010-06-13
Filing date: 2010-06-13
Publication date: 2011-02-09
Anticipated expiration: 2020-06-13

Abstract

The utility model discloses a novel threshing concave board sieve of a half feeding combined harvester, which is formed by connecting a punching sieve with a grid sieve, wherein the punching sieve is arranged at one side of a feeding opening, and the area ratio of the punching sieve and the grid sieve is 0.8:1 to 1.5:1. The sieve holes of the punching sieve are linear holes, and the long axis of each linear hole and a roller axis are in an included angle of 30 to 40 degrees. The novel threshing concave board sieve has the advantages of simple structure, convenient manufacture and low using and maintaining cost and greatly solves the problem that the threshing rate, the percentage of broken grain, the separating power, the using life, the maintaining cost and the like are mutually contradictory.

Description

A kind of novel threshing concave plate sieve

Technical field

The utility model relates to the combine field, especially relates to the release unit of combine.

Background technology

At present the threshing concave plate of half-feed combine harvester sieve generally adopts single sieve aperture form, promptly uses a kind of in grid screen, stamped sieve or the wire gauze sieve.Wherein the sieve aperture of grid screen is that rectangle or side are square, and it is square that sieve aperture be side is shone in braiding, and stamped sieve is circle, rectangle or square, and sideline of rectangle or square opening and cylinder shaft line parallel.Grid screen intensity height, the working service cost is low, and screen rate height, applicability are wide, be to use the widest a kind of threshing concave plate, but the grid concave plate percentage of damage are higher.The threshing function of half-feeding combine is mainly finished at feeding side, and this section adopts grid concave plate will cause bigger fragmentation.Stamped sieve had both had higher threshing ability, have lower percentage of damage again, but sieving capacity was than grid screen difference.Wire gauze sieve aspect the transaction capabilities between preceding two kinds of forms, but service life is low, thus in the operation broken grass hang over easily steel wire in length and breadth infall reduce sieving capacity and threshing ability.Though therefore the concave grate of several single sieve aperture form commonly used is simple in structure in the existing technology, all has the conflicting problems in aspect such as threshing performance, percentage of damage, separating power, service life and maintenance cost.Two patent disclosures of Chinese patent CN2607009Y and CN200987289Y the same in essence technical scheme, promptly under the prerequisite that does not change the concave grate well format, attempt to change the contradiction of the grid concave plate sieve percentage of thresh and screen rate by the method that the big or small grid screen sieve aperture of difference is set at the notch board different parts, obtain certain useful effect, but can't overcome the high problem of grid screen percentage of damage.

Summary of the invention

It is a kind of simple in structure, easily manufactured that the utility model provides, and the working service cost is low, and can take into account the threshing intaglio plate sieve of the conflicting problems in aspect such as solving threshing performance, percentage of damage, separating power, service life and maintenance cost preferably.

The technical solution adopted in the utility model is: a kind of novel threshing concave plate sieve, comprise sieve plate and dividing plate, described sieve plate is formed by connecting by stamped sieve and grid screen, wherein stamped sieve is located at feeding mouth one side, described stamped sieve is 0.8: 1 to 1.5: 1 with the area ratio of grid screen, the sieve aperture of described stamped sieve is an elongated hole, and the major axis of elongated hole and cylinder axis are 30 ° to 40 ° angle.

The concave grate of combine sheller unit has two effects in threshing operations, the one, cooperate the flailing action that crop kernel is separated with stalk with threshing cylinder, the 2nd, make the sieving actoion that in time enters seed collecting chamber or cleaning room with seed after stalk separates by sieve aperture.In half-feed combine harvester, the different parts of the threshing concave plate sieve situation that right wait takes off thing is different, so the feeding oral-lateral of threshing concave plate sieve and the operating environment of concave grate inboard differ greatly.Compare with the inboard at the pan feeding oral-lateral, it is intensive relatively to wait to take off thing, higher relatively to the threshing Capability Requirement of release unit, requires the percentage of damage of threshing low simultaneously.And in the concave grate inboard; the crop closeness is relatively low, waits to take off rare cane in the thing, especially rare long shoot bar; taken off but do not reached the seed that enters seed collecting chamber or cleaning room and can move to the inside at the pan feeding oral-lateral, so the sieving capacity of release unit is a principal aspect of a contradiction.In addition, taken off seed and be similar to the synthetic of two motions at the beginning with respect to the motion of compass screen surface: the one, by the decision of crop carrier chain along drum shaft to move, the 2nd, hit the circumferential movement of acquisition because of being subjected to the threshing element.Therefore, taken off seed and axially should present skewedly with respect to the motion of notch board compass screen surface and notch board, the inclination angle changes between 30 ° to 40 ° greatly.According to above situation, the utility model adopts the concave grate of two sections different sieve aperture versions to be combined into one and obtains a kind of novel threshing concave plate sieve, and the low stamped sieve of percentage of damage is arranged at the pan feeding oral-lateral, the high grid screen of sieving capacity is arranged at the inboard of concave grate, and the area of stamped sieve and grid screen ratio was made as 0.8: 1 to 1.5: 1.The sieve aperture of stamped sieve of the present utility model adopts elongated hole simultaneously, the major axis of elongated hole and cylinder axis are the inclination mode arranged distribution of 30 ° to 40 ° angle, stamped sieve sieve aperture major axis is approaching parallel with the seed direction of motion like this, under the constant prerequisite of concave grate area, improve effective sifting area, thereby improved screening efficiency.The raising of screening efficiency, helping some has taken off seed and in time breaks away from concave grate and enter seed collecting chamber or cleaning room, reduced the resistance of back segment threshing operations, help improving the threshing efficiency of back segment threshing zone and reduce the machine energy consumption, therefore, under the prerequisite that guarantees production capacity and performance indications, can reduce the air permeability rate of stamped sieve compass screen surface, improve the mechanical strength of stamped sieve, in the service life of lengthening stamped sieve, overcome the low shortcoming of stamped sieve intensity in the prior art.Therefore, the utility model threshing intaglio plate sieve can make stamped sieve and grid screen advantage separately be brought into play preferably, can take into account the conflicting problems in aspect such as solving threshing performance, percentage of damage, separating power, service life and maintenance cost preferably.Especially the more coaxial double speed threshing cylinder with inventor's invention is used, and can also obtain goodish energy-saving effect.

As preferably, the sieve aperture of the stamped sieve of described a kind of novel threshing concave plate sieve is selected slotted hole for use, so that processing and manufacturing improves compass screen surface intensity.

As preferably, described a kind of novel threshing concave plate sieve, its stamped sieve sieve aperture is along circumferentially becoming row axially in a row uniform, so that make processing.

As preferably, two districts before and after described stamped sieve is divided into vertically, in the two district, front and back in described sieve aperture separately circumferentially one-tenth be listed as axially in a row uniformly, the air permeability rate in proparea is lower than the open-work rate of back zone.What tackled the back zone is the seed of some more difficult threshings, improves the back zone air permeability rate, has promptly improved the threshing ability, thereby has improved the percentage of thresh of whole concave grate, reduces the threshing loss.

Processing and manufacturing and working service for ease of concave grate, as preferably, described a kind of novel threshing concave plate sieves its dividing plate and is divided into stamped sieve dividing plate and grid screen dividing plate, described stamped sieve dividing plate is arranged on the described stamped sieve, described grid screen dividing plate is arranged on the grid screen, described stamped sieve dividing plate is identical with grid screen dividing plate number, and correspondence is arranged on the same circumference.

As preferably, two districts before and after described stamped sieve is divided into, the ratio of the area of proparea and back zone is 3: 2 to 2: 1, in order to avoid cause the concave grate bulk strength excessively to reduce because of the reduction of back zone stamped sieve intensity.

Because the technical scheme that the utility model adopted, situation about differing greatly according to the operating environment of the feeding oral-lateral of threshing concave plate sieve and concave grate inboard, adopt the reasonable coupling combination of stamped sieve and grid screen, give full play to the sieve plate advantage separately of these two kinds of different sieve aperture forms, make that adopting single sieve aperture form concave grate to be difficult to take into account conflicting problem such as the aspect that solves threshing performance, percentage of damage, separating power, service life and maintenance cost has obtained solving preferably.

Description of drawings

Fig. 1 is a concave grate structural representation front view;

The concave grate structure of Fig. 2 embodiment 1 overlook expanded view;

The concave grate structure of Fig. 3 embodiment 2 overlook expanded view.

Embodiment

Below in conjunction with description of drawings embodiment of the present utility model.

Fig. 1 is the concave grate structural representation front view of embodiment 1 and embodiment 2.Wherein stamped sieve 1 is located at feeding mouth one side, and the area ratio of stamped sieve 1 and grid screen 2 is 1: 1.Here cylinder rotates in the direction of the clock.

Fig. 2 be embodiment 1 concave grate overlook expanded view, stamped sieve 1 is made of sieve plate 11 and punching sieve plate dividing plate 12 as shown in the figure; Grid screen 2 is made of frame 21, steel wire 22, grid screen dividing plate 23 and grizzly bar 24; Described stamped sieve dividing plate 12 and grid screen dividing plate 23 numbers are 2 all, are arranged on the same circumference, and the threshing concave plate sieve longitudinally is divided into three districts.Wherein the sieve aperture of stamped sieve is a slotted hole, and the axial angle of the major axis of slotted hole and concave grate is 35 °.

Fig. 3 is that the concave grate of embodiment 2 is overlooked expanded view.As shown in the figure, the place different with embodiment 1 is that stamped sieve is divided into former and later two districts, and the ratio of the area of proparea and back zone is 3: 2, and the air permeability rate of back zone is higher than the proparea.

The technical scheme that the utility model adopted, situation about differing greatly according to the operating environment of the feeding oral-lateral of threshing concave plate sieve and concave grate inboard, adopt the reasonable coupling combination of stamped sieve and grid screen, give full play to the sieve plate advantage separately of these two kinds of different sieve aperture forms, make that adopting single sieve aperture form concave grate to be difficult to take into account conflicting problem such as the aspect that solves threshing performance, percentage of damage, separating power, service life and maintenance cost has obtained solving preferably.

Claims

1. a novel threshing concave plate sieves, comprise sieve plate and dividing plate, it is characterized in that described sieve plate is formed by connecting by stamped sieve and grid screen, wherein stamped sieve is located at feeding mouth one side, described stamped sieve is 0.8: 1 to 1.5: 1 with the area ratio of grid screen, the sieve aperture of described stamped sieve is an elongated hole, and the major axis of elongated hole and cylinder axis are 30 ° to 40 ° angle.

2. a kind of novel threshing concave plate sieve according to claim 1, the sieve aperture that it is characterized in that described stamped sieve is a slotted hole.

3. a kind of novel threshing concave plate sieve according to claim 1 and 2 is characterized in that described stamped sieve sieve aperture circumferentially becomes row axially in a row uniform.

4. a kind of novel threshing concave plate sieve according to claim 1 and 2 is characterized in that described stamped sieve is divided into two districts, front and back vertically, and it is axially in a row uniform that described sieve aperture circumferentially becomes row separately in two districts, front and back, and the air permeability rate in proparea is lower than the open-work rate of back zone.

5. a kind of novel threshing concave plate sieve according to claim 1 and 2, it is characterized in that described dividing plate is divided into stamped sieve dividing plate and grid screen dividing plate, described stamped sieve dividing plate is arranged on the described stamped sieve, described grid screen dividing plate is arranged on the grid screen, described stamped sieve dividing plate is identical with grid screen dividing plate number, and correspondence is arranged on the same circumference.

6. a kind of novel threshing concave plate sieve according to claim 4 is characterized in that the area ratio of described stamped sieve proparea and back zone is 3: 2 to 2: 1.