CN106051165A - Flexible fit seal ring for air-suction seed metering device - Google Patents

Abstract

The invention provides a flexible sealing ring for an air-suction seed metering device, which can be closely bonded to the back of the seed metering disk, effectively reducing the loss of wind pressure caused by poor airtightness of the vacuum chamber, and improving the efficiency of the fan. Reduce the leakage rate of the seed meter. The invention adopts the following technical solutions: a flexible sealing ring for an air suction seed metering device, including a support body, a lip, a stop ring and a positioning boss; the support body is arranged on the air chamber shell of the air suction seed metering device, supporting Both inside and outside the body are ring-shaped structures with curved surfaces, and the ring structures have fractures; the upper part of the support body is provided with a lip, which is in contact with the seeding disk of the air suction seed metering device; the inner and outer sides of the middle part of the support body are respectively provided with a circle of stop rings; There are several positioning bosses at intervals on the outer side of the lower part of the support body; the support body, lip and stop ring are combined to form an air cavity with openings on the upper and lower parts, including the seed suction area AB, seed clearing area BC, and seed delivery area CD arranged in sequence and seeding area DE.

Description

Flexible sealing ring for air suction seed metering device

technical field

The invention relates to a sealing device in the field of agricultural machinery, in particular to a flexible sealing ring for an air-suction seed metering device.

Background technique

Due to its high speed and precision, the air suction seed meter has become the key development direction of precision seeding technology for large seeds. Its working principle is to use the negative pressure generated by the high-speed fan to form a vacuum chamber on one side of the seeding disc. When the seeding disc rotates with the shaft, the vacuum chamber remains static, and the seeds are adsorbed under the negative pressure of the vacuum chamber. on the seed tray. When the seed-filling hole where the seeds are located turns out of the vacuum chamber, the negative pressure disappears, and the seeds fall down by their own weight or the action of the seed scraper to complete the seed-discharging action.

In the case of the same fan, the better the airtightness of the vacuum chamber, the greater the negative pressure generated in the chamber, and the more the pressure difference on both sides of the seed tray can firmly absorb the seeds, thereby effectively reducing leakage and hole. Good airtightness of the vacuum chamber is particularly important in field operations with large undulating ground and high-speed operations.

The vacuum chamber of the current air-suction seed metering device is mainly composed of a seeding disc and a rigid component. Due to the relative movement between the seed disc and other components of the air chamber, too tight fit will cause greater friction, increase the resistance of the seed disc rotation, accelerate the wear of the seed disc and other air chamber components, and affect the service life ; If the fit is too loose, the airtightness of the air chamber will be poor, the power loss of the fan will be increased, and it will easily cause leakage and cavitation.

Studying the appropriate structure and material of the air chamber will effectively improve the airtightness of the vacuum chamber, reduce the leakage rate of the seed meter, and reduce the power loss of the fan.

Contents of the invention

In order to solve the above problems, the present invention provides a flexible sealing ring for an air suction seed metering device, which can be closely bonded to the back of the seeding tray, effectively reducing the loss of wind pressure caused by the poor airtightness of the vacuum chamber, and improving the efficiency of the fan, thereby Reduce the leakage rate of the seed meter under the same condition of the fan.

The present invention adopts following technical scheme:

A flexible sealing ring for an air suction seed metering device, including a support body, a lip, a stop ring and a positioning boss; shaped structure, and the annular structure has a fracture; the upper part of the support body is provided with a lip, which is in contact with the seeding plate of the air suction seed metering device; the inner and outer sides of the middle part of the support body have a circle of stop rings; A positioning boss; the support body, the lip and the stop ring are combined to form an upper and lower air chamber with openings, including the seed suction area AB, seed clearing area BC, seed delivery area CD and seed injection area DE arranged in sequence.

Furthermore, the supporting body, the lip, the stop ring and the positioning boss are of an integrated structure, which is processed and formed by a mold at one time and cannot be separated from each other. This structure can ensure the airtightness of the vacuum chamber after sealing.

Further, the support body, the lip and the stop ring are in a C-shaped structure as a whole, the support body, the lip and the stop ring are arranged concentrically, and the central angle is 240°-300°.

Furthermore, both the inner ring and the outer ring of the lip are flanged toward the outside of the air cavity. This structure can prevent the lip from turning inward when the seed disk rotates, and prevent air pressure disturbance caused by air intake.

Further, the lip has an extended part at the end of the seeding area, and the extended part can prevent air pressure disturbance caused by air intake in the seed-filling hole after seeding.

Further, the supporting body is a skeletonless structure made of rubber material.

Furthermore, the stop ring has a semi-circular structure, which can effectively prevent air leakage from the gap between the support body and the air cavity shell, causing air pressure loss, and can effectively reduce the contact area between the support body and the air cavity shell, reducing Small frictional resistance when installed.

Further, the positioning boss is a cuboid protrusion, which can fix the position of the sealing ring and prevent the sealing ring from moving in all directions.

Beneficial effects of the present invention: the supporting body of the sealing ring is concave-convex matched with the housing of the air chamber, the lip can be closely attached to the back of the seeding tray, and the vacuum chamber can effectively reduce the airtightness of the vacuum chamber caused by poor airtightness of the vacuum chamber. The loss of wind pressure can improve the efficiency of the fan, thereby reducing the leakage rate of the seed meter under the same condition of the fan. The stop ring can effectively prevent the sealing ring from falling during operation, the positioning boss can effectively prevent the sealing ring from moving and rotating, and the extension of the lip at the end of the seeding area can effectively prevent the air pressure disturbance caused by the air intake of the hole after seeding.

Description of drawings

The present invention will be further described below in conjunction with accompanying drawing:

Fig. 1 is the front structural representation of the present invention;

Fig. 2 is the F-F sectional structure schematic diagram of the present invention;

Fig. 3 is the left side view of the present invention;

Fig. 4 is a three-dimensional rendering of the present invention.

In the figure: 1. lip, 2. support body, 3. stop ring, 4. positioning boss, 5. air cavity.

detailed description

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and examples.

A flexible sealing ring for an air suction seed metering device, including a support body 2, a lip 1, a stop ring 3 and a positioning boss 4; the support body 2 is arranged on the air chamber housing of the air suction seed metering device, and the support body 2 The inner and outer sides are ring-shaped structures with curved surfaces, and the ring structures have fractures; the upper part of the support body 2 is provided with a lip 1, and the lip 1 is in contact with the seeding disk of the air suction seed metering device; the inner and outer sides of the middle part of the support body 2 have a circle The stop ring 3; several positioning bosses 4 are arranged at intervals on the outer side of the lower part of the support body 2; the support body 2, the lip 1 and the stop ring 3 are combined to form an air chamber 5 with openings on the upper and lower parts, including seed suction areas arranged in sequence AB, seed clearing area BC, seed delivery area CD, and seed feeding area DE, each area has no obvious boundaries, and the division of each area is based on the installation position of other working parts of the seed metering device.

In this embodiment, the support body 2 , the lip 1 , the stop ring 3 and the positioning boss 4 are of an integrated structure, which are processed and formed by a mold at one time, and cannot be separated from each other.

In this embodiment, the support body 2, the lip 1 and the stop ring 3 are C-shaped as a whole, the support body 2, the lip 1 and the stop ring 3 are arranged concentrically, and the central angle is 240°~300°.

In this embodiment, both the inner and outer rings of the lip 1 are flanged toward the outside of the air cavity; the lip 1 has an extended part at the end of the seeding area.

In this embodiment, the stop ring 3 is a semi-circular structure; the positioning boss 4 is a cuboid protrusion.

In this embodiment, the support body 2 is a frameless structure made of rubber material.

The supporting body 2 of the present invention is concave-convex matched with the housing of the air chamber, the lip 1 can be closely attached to the back of the seeding tray, and the wind pressure loss caused by the poor airtightness of the vacuum chamber can be effectively reduced under the condition of decompression of the vacuum chamber. Improve the efficiency of the fan, so as to reduce the leakage rate of the seed meter under the same condition of the fan. The stop ring 3 can effectively prevent the sealing ring from falling during the working process, the positioning boss 4 can effectively prevent the sealing ring from moving and rotating, and the extension of the lip 1 at the end of the seeding area can effectively prevent the air intake caused by the hole after seeding. air pressure disturbance.

The working process of the present invention is as follows: the sealing ring of the present invention moves relative to the seed-discharging disc, and when moving, it is stationary with the housing of the air chamber, and the seed-discharging disc rotates clockwise. When the seed-filling hole on the seed-discharging disc rotates to the seed-suction area AB, the seeds are sucked up; when it is rotated to the seed-clearing area BC, the excess seeds are removed by the seed-clearing knife, leaving only one seed ;The seeds rotate through the seed delivery area CD with the disk, and when they turn out of the end of the seed delivery area DE, the air negative pressure disappears, and the seeds fall.

The above-mentioned specific embodiments are only specific cases of the present invention, and are not intended to limit the present invention in other forms. Any skilled person who is familiar with this field may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes. However, under the premise of not departing from the technical principle of the present invention, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention shall fall within the scope of patent protection of the present invention.

Claims (8)

1. an air-suction seed metering device flexibility laminating sealing ring, it is characterised in that: include supporter, lip, stopper ring and location Boss；Supporter is arranged on the gas chamber shell of air-suction seed metering device, and in supporter, outside is the circulus of curved surface, and ring-type Structure has fracture；Supporter top is provided with lip, and lip contacts with the discharge plate of air-suction seed metering device；Inside and outside in the middle part of supporter Side is respectively arranged with a circle stopper ring；Supporter lower outside is arranged at intervals with several positioning boss；Supporter, lip and stopper ring combination Become upper and lower part to have the air cavity of opening, including the suction kind region AB set gradually, clear kind region BC, send kind of region CD and district of charging seed Territory DE.

Air-suction seed metering device flexibility laminating sealing ring the most according to claim 1, it is characterised in that: supporter, lip, stop Circle and positioning boss are integral type structure, are processed and formed at one time by mould, and can not be split each other.

Air-suction seed metering device flexibility laminating sealing ring the most according to claim 1, it is characterised in that: supporter, lip and only Moving-coil generally C-shaped configuration, supporter, lip and stopper ring are for being arranged concentrically, and central angle is 240 ° ~ 300 °.

Air-suction seed metering device flexibility laminating sealing ring the most according to claim 1, it is characterised in that: lip inner ring and outer ring are equal To the outside flange of air cavity.

Air-suction seed metering device flexibility laminating sealing ring the most according to claim 1, it is characterised in that: lip is at end, region of charging seed End has prolongation.

Air-suction seed metering device flexibility laminating sealing ring the most according to claim 1, it is characterised in that: supporter is exoskeletal knot Structure, uses elastomeric material to make.

7. according to the flexibility laminating sealing ring of air-suction seed metering device described in any one of claim 1 to 6, it is characterised in that: stopper ring For semi-annular shape structure.

8. according to the flexibility laminating sealing ring of air-suction seed metering device described in any one of claim 1 to 6, it is characterised in that: convex Platform is that cuboid is protruding.