阅读说明：本技术 一种排种器滚筒的动密封结构 (Dynamic sealing structure of seed sowing device roller ) 是由 祁兵 张文毅 王云霞 李坤 扈凯 严伟 刘宏俊 于 2020-06-30 设计创作，主要内容包括：本发明公开了一种排种器滚筒的动密封结构,用于滚筒的端部与机箱之间的密封,其包括密封盘,所述密封盘呈圆环状,其具备安装部以及具有形变性能的薄型边缘部,所述薄型边缘部直接或间接地紧贴所述滚筒的端部；所述密封盘通过所述安装部安装在所述机箱上,且所述薄型边缘部与所述机箱之间设有弹性件。本发明的排种器滚筒的动密封结构,通过设置带有薄型边缘部的密封盘以及弹性件,弹性件可使薄型边缘部紧贴滚筒的端部,由于薄型边缘部具有形变性能,其可适应滚筒的端部变化以保证滚筒与机箱之间的密封性,从而可降低对滚筒安装精度与加工精度的要求,以降低成本,此外,该结构运转时磨损小,寿命长。(The invention discloses a dynamic sealing structure of a roller of a seed sowing device, which is used for sealing between the end part of the roller and a case and comprises a sealing disc, wherein the sealing disc is annular and is provided with an installation part and a thin edge part with deformation performance, and the thin edge part is directly or indirectly attached to the end part of the roller; the sealing disc is installed on the case through the installation part, and an elastic piece is arranged between the thin edge part and the case. The dynamic sealing structure of the seeding unit roller can ensure that the thin edge part is tightly attached to the end part of the roller by arranging the sealing disc with the thin edge part and the elastic part, and the thin edge part has deformation performance and can adapt to the end part change of the roller to ensure the sealing performance between the roller and a case, thereby reducing the requirements on the mounting precision and the processing precision of the roller to reduce the cost.)

1. A dynamic sealing structure of a roller of a seed sowing device is used for sealing between the end part of the roller (10) and a case (20), and is characterized by comprising a sealing disc (1), wherein the sealing disc (1) is annular and is provided with an installation part (13) and a thin edge part (11) with deformation performance, and the thin edge part (11) is directly or indirectly attached to the end part of the roller (10); the sealing disc (1) is installed on the case (20) through the installation part (13), and an elastic part (2) is arranged between the thin edge part (11) and the case (20).

2. The dynamic seal structure of the roller of the seed metering device of claim 1, characterized in that the end of the roller (10) is fixedly provided with an annular end seal (4), and the end seal (4) is closely attached to the thin edge part (11).

3. The dynamic seal structure of the roller of the seed metering device of claim 2, characterized in that one end of the end seal (4) is provided with a ring groove (41), and the end of the roller (10) is provided with an embedding part (101) embedded into the ring groove (41).

4. The dynamic seal structure of the seed metering device roller according to claim 1, characterized in that the elastic member (2) is ring-shaped, is made of elastic material, and is coaxially installed with the sealing disk (1).

5. The dynamic seal structure of the roller of the seed metering device is characterized by further comprising an end cover (3), wherein the end cover (3) is fixedly arranged on the case (20), and the seal disc (1) is fixed on the end cover (3); two end faces of the elastic piece (2) respectively abut against the thin edge part (11) and the end cover (3).

6. The dynamic seal structure of a seed metering device roller according to claim 5, characterized in that the sealing disk (1) is not in contact with the end cap (3) with a gap therebetween.

7. The dynamic seal structure of the seed metering device roller according to claim 5, characterized in that the seal disc (1) is provided with an axially extending tubular part (12), and the tubular part (12) is arranged between the thin edge part (11) and the mounting part (13); the elastic part (2) is sleeved on the tubular part (12).

8. The dynamic seal structure of the roller of the seed metering device as claimed in claim 1, characterized in that the material of the seal disc (1) is wear-resistant non-metallic material.

9. The dynamic seal structure of the roller of the seed metering device as claimed in claim 1, characterized by further comprising a roller rotating shaft (5), wherein a hub member (6) is fixed on the roller (10), and the hub member (6) is rotatably mounted relative to the roller rotating shaft (5).

10. The dynamic seal structure of the seed metering device roller according to claim 9, characterized in that the hub member (6) has a plurality of radial extensions (61), the end of each radial extension (61) has a vertical bend (62), and the vertical bend (62) is fixed with the roller (10) by a screw.

Technical Field

The invention relates to the technical field of agricultural machinery, in particular to a dynamic sealing structure of a roller of a seed sowing device.

Background

In a precision seeding seed metering ware, it includes cylinder and quick-witted case, and the cylinder is installed at quick-witted incasement, and quick-witted incasement has the seed supply unit, has the seed suction hole array that the circumference array set up on the cylinder, and precision seeding seed metering ware during operation, the inside and outside atmospheric pressure of cylinder is unequal for the seed suction hole has suction, and the seed suction hole can follow the seed supply unit and adsorb the seed in order to follow the seed heap accurate separation of seed and transfer to the discharge gate, arranges the material in order to realize the smart volume of seed, satisfies the precision seeding needs of crops. In this kind of seed metering ware, need seal the both ends of cylinder, guarantee only to communicate through inhaling the hole between the inside and outside both sides of cylinder, so, when the inside and outside atmospheric pressure inequality of cylinder, it has stable suction to inhale the hole, because the cylinder still need rotate the purpose in order to carry out the transfer seed for quick-witted case, therefore, need carry out the action to the both ends of cylinder and seal, current dynamic seal mode generally sets up the rubber ring at the both ends of cylinder, to the cylinder of major diameter, the rubber ring can produce great frictional force and hinder the rotation of cylinder, wearing and tearing and generating heat all great, and adopt the rubber ring sealing mode, the movement resistance is very big, it is higher to the machining precision requirement of cylinder, the installation axiality of cylinder and the straightness requirement that hangs down of terminal surface for its pivot all are higher, and is high cost.

Disclosure of Invention

The purpose of the invention is as follows: in order to overcome the defects in the prior art, the invention provides the dynamic sealing structure of the roller of the seed sowing device, which has reliable sealing, small resistance and low cost.

The technical scheme is as follows: in order to achieve the aim, the dynamic sealing structure of the roller of the seed sowing device is used for sealing between the end part of the roller and a chassis, and comprises a sealing disc, wherein the sealing disc is annular and is provided with a mounting part and a thin edge part with deformation performance, and the thin edge part is directly or indirectly attached to the end part of the roller; the sealing disc is installed on the case through the installation part, and an elastic piece is arranged between the thin edge part and the case.

Furthermore, an annular end sealing piece is fixedly mounted at the end part of the roller, and the end sealing piece is closely attached to the thin edge part.

Further, one end of the end seal has a ring groove, and the end of the drum has an embedding part embedded in the ring groove.

Further, the elastic member is annular, is made of an elastic material, and is coaxially installed with the sealing disk.

The sealing device further comprises an end cover, wherein the end cover is fixedly arranged on the case, and the sealing disc is fixed on the end cover; two end faces of the elastic piece respectively abut against the thin edge part and the end cover.

Further, the sealing disk is not in contact with the end cap with a gap therebetween.

Further, the seal disc is provided with a tubular part extending in the axial direction, and the tubular part is arranged between the thin edge part and the mounting part; the elastic member is sleeved on the tubular part.

Furthermore, the material of the sealing disc is nylon and other wear-resistant non-metallic materials.

The drum further comprises a drum rotating shaft, wherein a hub piece is fixed on the drum, and the hub piece is rotatably installed relative to the drum rotating shaft.

Further, the hub member has a plurality of radially extending portions, and an end of each of the radially extending portions has a vertical bent portion, and the vertical bent portion is fixed to the drum by a screw.

Has the advantages that: the dynamic sealing structure of the seeding unit roller of the invention can ensure that the thin edge part is tightly attached to the end part of the roller by arranging the sealing disc with the thin edge part and the elastic part, and the thin edge part has deformation performance and can adapt to the end part change of the roller to ensure the sealing performance between the roller and a case, thereby reducing the requirements on the mounting precision and the processing precision of the roller to reduce the cost.

Drawings

FIG. 1 is a combination view of a drum and a dynamic seal structure;

FIG. 2 is a combined exploded view of the drum and the dynamic sealing structure;

FIG. 3 is a combined cross-sectional view of the drum and the dynamic seal structure;

fig. 4 is an enlarged structural view of a portion a of fig. 3.

In the figure: 10-a roller; 101-an insert; 20-a case; 1-sealing disc; 11-thin edge portion; 12-a tubular portion; 13-a mounting portion; 14-mounting grooves; 2-an elastic member; 3-end cover; 31-a gas-permeable groove; 4-end seal; 41-ring groove; 5-a roller rotating shaft; 6-a hub piece; 61-a radial extension; 62-vertical bending part; 7-first screw.

Detailed Description

The present invention will be further described with reference to the accompanying drawings.

The dynamic seal structure of the roller of the seed metering device shown in figures 1-3 is used for sealing between the end of the roller 10 and a case 20 and comprises a seal disc 1, an elastic piece 2 and an end cover 3.

Wherein, the end cover 3 is fixedly arranged on the case 20 and is used as a transition connecting piece between the sealing disc 1 and the case 20.

The sealing disk 1 is annular and is provided with a mounting part 13 and a thin edge part 11 with deformation performance, the mounting part 13 and the thin edge part 11 are both annular and are connected through a tubular part 12, so that the mounting part 13 and the thin edge part 11 are mutually staggered in the axial direction of the sealing disk 1, and the thin edge part 11 is directly or indirectly attached to the end part of the roller 10; the mounting part 13 is provided with a mounting groove 14, the first screw 7 is used for mounting the sealing disc 1 on the end cover 3 through the mounting groove 14, the mounting part 13 is closer to the end cover 3, and the thin edge part 11 is farther from the end cover 3; an elastic part 2 is arranged between the thin edge part 11 and the case 20, the elastic part 2 is annular, which is made of elastic material (in this embodiment, the elastic member 2 is made of foamed rubber), and which is fitted over the tubular portion 12 to achieve coaxial installation with the sealing disk 1, the two end faces of the elastic element 2 respectively abut against the thin edge part 11 and the end cover 3, the tightening action of the first screw 7 causes the elastic element 2 to have a certain pre-compression amount, the elastic member 2 has a thrust action on the thin edge portion 11 so that the thin edge portion 11 is tightly attached to the end of the roller 10 to make up the gap between the two, so as to seal the two, and along with the change of the rotation angle of the roller 10, the elastic piece 2 can enable the thin edge part 11 to deform at any time so as to make up the gap between the thin edge part 11 and the end part of the roller 10, and the aim of dynamic sealing is fulfilled.

Preferably, the sealing disc 1 is not in contact with the end cover 3, a gap is formed between the sealing disc 1 and the end cover 3, namely, the closest mounting part 13 close to the end cover 3 is not in direct contact with the end cover 3, so that the elastic element 2 is supported between the sealing disc 1 and the end cover 3, the sealing disc 1 is in a floating state relative to the end cover 3, the sealing disc 1 can have a larger floating movement space, not only can the thin edge part 11 make deformation compensation, but also when the mounting precision of the roller 10 is poor, the whole sealing disc 1 can make movement compensation along with the movement of the end part of the roller 10, so that the requirements of the manufacturing precision and the mounting precision of the roller 10 can be further reduced, and the. The mounting groove 14 on the mounting part 13 is a notch groove communicated with the central hole of the mounting part, and the design is also beneficial to the floating movement of the sealing disc 1 relative to the end cover 3, so that the constraint on the sealing disc 1 is reduced.

In this embodiment, the thin edge 11 is in indirect contact with the end of the drum 10, specifically, an annular end seal 4 is fixedly mounted on the end of the drum 10, and the end seal 4 is closely attached to the thin edge 11. The end seal 4 is thin as a whole, and its processing is easy, compares in clamping cylinder 10 and processes its terminal surface, and the mode of setting up end seal 4 at the tip of cylinder 10 is simpler, more practices thrift the cost, specifically, the one end of end seal 4 has annular 41, the tip of cylinder 10 has the embedding portion 101 of annular 41. The end face of the end seal 4 facing the seal disc 1 can be finish machined to ensure the sealing performance after the two are tightly attached.

The sealing disc 1 is made of engineering plastics, preferably nylon, the end sealing piece 4 can be made of metal pieces, the nylon is made of the engineering plastics and has good self-lubricating property, friction is small when the nylon is in contact with the end sealing piece 4 and rotates relatively, abrasion is small, and the service life is long. In addition, the material of the sealing disc 1 can also be other wear-resistant non-metallic materials.

The drum 10 is rotatably mounted on the cabinet 20 through a drum rotating shaft 5, the drum rotating shaft 5 is fixedly mounted on the end cover 3, a hub member 6 is fixed on the drum 10, the hub member 6 is rotatably mounted on the drum rotating shaft 5, and a bearing is arranged between the two to improve the rotation smoothness. Specifically, the hub member 6 has a plurality of radial extensions 61, and the end of each radial extension 61 has a vertical bent portion 62, and the vertical bent portion 62 is fixed to the drum 10 by a second screw. The vertical bent part 62 on the hub member 6 can be formed in a bent manner, which is low in cost, and although the machining method is low in precision, the sealing relationship between the roller 10 and the end cover 3 can be ensured due to the design of the above dynamic sealing structure.

The end cover 3 is formed with a plurality of ventilation slots 31, when in actual use, the interior of the roller 10 is connected with the atmosphere through the ventilation slots 31, and gas is injected into the case 20 to increase the air pressure, so that the air pressure inside and outside the roller 10 forms a pressure difference, and the seed can be adsorbed by the suction holes on the roller 10 and conveyed to a target position.

The dynamic sealing structure of the seeding unit roller can ensure that the thin edge part is tightly attached to the end part of the roller by arranging the sealing disc with the thin edge part and the elastic part, and the thin edge part has deformation performance and can adapt to the end part change of the roller to ensure the sealing performance between the roller and a case, thereby reducing the requirements on the mounting precision and the processing precision of the roller to reduce the cost.

The above description is only of the preferred embodiments of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention and these are intended to be within the scope of the invention.