CN212650069U

CN212650069U - Dynamic sealing structure at end of seed-metering roller

Info

Publication number: CN212650069U
Application number: CN202021245955.0U
Authority: CN
Inventors: 祁兵; 张文毅; 王云霞; 李坤; 扈凯; 严伟; 刘宏俊
Original assignee: Nanjing Research Institute for Agricultural Mechanization Ministry of Agriculture
Current assignee: Nanjing Research Institute for Agricultural Mechanization Ministry of Agriculture
Priority date: 2020-06-30
Filing date: 2020-06-30
Publication date: 2021-03-05
Anticipated expiration: 2030-06-30

Abstract

The utility model discloses a dynamic sealing structure used at the end part of a seed sowing roller, 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 in a circular ring shape and is provided with a thin edge part with deformation performance, and the thin edge part is directly or indirectly clung to the end part of the roller; the sealing disc is installed on the case, and an elastic piece is arranged between the thin edge part and the case. The utility model discloses an utilize the dynamic seal structure at the tip of seed metering cylinder, through setting up sealed dish and the elastic component that has slim edge part, the elastic component can make the tip of cylinder hug closely by slim edge part, because slim edge part has deformability, the tip of its adaptable cylinder changes in order to guarantee the leakproofness between cylinder and the quick-witted case to can reduce the requirement to cylinder installation accuracy and machining precision, with reduce cost, in addition, wearing and tearing are little when this structure operates, longe-lived.

Description

Dynamic sealing structure at end of seed-metering roller

Technical Field

The utility model relates to the technical field of agricultural machinery, in particular to a dynamic sealing structure for the end part of a seed sowing roller.

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 utility model provides a dynamic sealing structure which is reliable in sealing, small in resistance and low in cost and is used at the end part of a seed sowing roller.

The technical scheme is as follows: in order to achieve the above object, the present invention provides a dynamic seal structure for a seeding roller, which is used for sealing between the end of the roller and a machine box, and comprises a sealing disc, wherein the sealing disc is in a ring shape and is provided with a thin edge part with deformation performance, and the thin edge part is directly or indirectly attached to the end of the roller;

the sealing disc is installed on the case, and an elastic piece is arranged between the thin edge part and the case.

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 sealing disc is provided with a tubular part extending axially, and the elastic piece is sleeved on the tubular part.

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.

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 utility model discloses an utilize the dynamic seal structure at the tip of seed metering cylinder, through setting up sealed dish and the elastic component that has slim edge part, the elastic component can make the tip of cylinder hug closely by slim edge part, because slim edge part has deformability, the tip of its adaptable cylinder changes in order to guarantee the leakproofness between cylinder and the quick-witted case, thereby can reduce the requirement to cylinder installation accuracy and machining precision, with reduce cost, in addition, this structure wearing and tearing are little during the operation, the movement resistance is little, longe-lived.

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 sealing structure at the end of the seed roller is used for sealing between the end of the roller 10 and the machine box 20, and comprises a sealing disc 1, an elastic piece 2 and an end cover 3, as shown in figures 1-3.

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 utility model discloses an utilize the dynamic seal structure at the tip of seed metering cylinder, through setting up sealed dish and the elastic component that has slim edge part, the elastic component can make the tip of cylinder hug closely by slim edge part, because slim edge part has deformability, the tip of its adaptable cylinder changes in order to guarantee the leakproofness between cylinder and the quick-witted case to can reduce the requirement to cylinder installation accuracy and machining precision, with reduce cost, in addition, wearing and tearing are little when this structure operates, longe-lived.

The above description is only a preferred embodiment of the present invention, and it should be noted that: for those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be considered as the protection scope of the present invention.

Claims

1. A dynamic sealing structure used at the end of a seeding roller is used for sealing between the end 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 a thin edge part (11) with deformation performance, and the thin edge part (11) is directly or indirectly attached to the end of the roller (10);

the sealing disc (1) is installed on the case (20), and an elastic piece (2) is arranged between the thin edge portion (11) and the case (20).

2. A dynamic seal structure for use at the end of a seed metering roller according to claim 1 characterised in that the resilient member (2) is annular, is made of a resilient material and is mounted coaxially with the sealing disc (1).

3. A dynamic seal structure for use at the end of a seed metering roller according to claim 2, further comprising an end cap (3), wherein the end cap (3) is fixedly mounted on the casing (20), and the seal disk (1) is fixed on the end cap (3); two end faces of the elastic piece (2) respectively abut against the thin edge part (11) and the end cover (3).

4. A dynamic seal arrangement for use at the end of a metering roller as claimed in claim 3 characterised in that the sealing disk (1) is not in contact with the end cap (3) with a gap therebetween.

5. A dynamic seal structure for an end of a seed metering roller according to claim 3, characterized in that the seal disk (1) is provided with an axially extending tubular portion (12), and the elastic member (2) is fitted over the tubular portion (12).

6. A dynamic seal arrangement for use at the end of a seed metering roller as claimed in claim 1 wherein an annular end seal (4) is fixedly mounted to the end of the roller (10), the end seal (4) being in close contact with the thin edge portion (11).

7. A dynamic seal structure for use at the end of a seed metering roller according to claim 6, characterized in that the end seal (4) has a ring groove (41) at one end and the roller (10) has an insertion portion (101) at the end that is inserted into the ring groove (41).

8. A dynamic seal structure for use at the end of a seed metering roller according to claim 1, characterized in that the material of the sealing disc (1) is a wear-resistant non-metallic material.

9. A dynamic seal for use at the end of a seed metering roller as claimed in claim 1 further comprising a roller shaft (5), a hub member (6) being secured to the roller (10), the hub member (6) being rotatably mounted relative to the roller shaft (5).

10. A dynamic seal for use at the end of a seed metering roller as claimed in claim 9 wherein the hub member (6) has a plurality of radially extending portions (61), the end of each radially extending portion (61) having a vertical bend (62), the vertical bend (62) being secured to the roller (10) by screws.