CN201487215U

CN201487215U - Shaft seal device of high-speed powder mixer

Info

Publication number: CN201487215U
Application number: CN2009200987041U
Authority: CN
Inventors: 李玉生; 张金泉
Original assignee: TIANJIN ZHONGHUAN TCOA ELECTRONICS CO Ltd
Current assignee: TIANJIN ZHONGHUAN TCOA ELECTRONICS CO Ltd
Priority date: 2009-09-11
Filing date: 2009-09-11
Publication date: 2010-05-26
Anticipated expiration: 2019-09-11

Abstract

The utility model relates to a shaft seal device of a high-speed powder mixer, which comprises a main shaft, a shaft seal, a shaft seal sheath, an agitator and a mixer shell, and also comprises an air course system consisting of a solenoid valve, a pressure regulating valve and a pipeline, wherein the mixer shell is provided with a connecting piece; corresponding to the connecting piece, an air hole is reserved on the shaft seal sheath; the connecting piece is communicated with the air hole to form a channel for compressed air; and one end of the pipeline is connected with the mixer through the connecting piece, while the other end is connected with an air source of the compressed air. The shaft seal device has the advantages that a sealing chamber has a certain positive pressure due to the injection of the compressed air so as to prevent fine powder from entering; and simultaneously, flowing air also plays a role in cooling, so that the mixer shaft seal, a bearing and the main shaft are protected.

Description

Powder high-speed mixer shaft sealer

Technical field

The utility model relates to a kind of shaft sealer, particularly a kind of powder high-speed mixer shaft sealer.

Background technique

In the mixed process of powder processing, particularly for the powder of ultra-fine grain, because its particle diameter is very little, axle high speed rotating when mixing, powder is easy to enter in the gap of main shaft and stuffing box gland, frictional heating causes the shaft sealing infringement, thereby cause mixing machine between centers crack to leak powder and enter bearing chamber, often damage bearing even damage the mixing arbor, need the maintenance that stops production, not only influence is produced, and also will increase maintenance cost.

Summary of the invention

The utility model provides a kind of powder high-speed mixer shaft sealer especially for overcoming the above problems, and increases hermetic seal on the basis of former shaft sealing, and injecting compressed air in shaft sealing chamber guarantees to have certain malleation in the closed chamber, avoids powder to enter.

For achieving the above object, the technological scheme that the utility model is taked is: a kind of powder high-speed mixer shaft sealer, comprise main shaft, shaft sealing and shaft sealing cover, agitator and mixing machine shell, it is characterized in that, also comprise the air-channel system of forming by solenoid valve, pressure regulator valve, pressure gauge, pipeline, on described mixing machine shell, be provided with link, corresponding link puts in shaft sealing and is provided with pore, link communicates with pore and forms compressed-air actuated passage, one end of described pipeline is connected with mixing machine by link, another termination compressed air gas source.

The beneficial effects of the utility model are: because compressed-air actuated injection has had certain malleation in the closed chamber, avoid the fine powder body to enter, flow air has also played cooling action simultaneously, has protected mixing machine shaft sealing, bearing and main shaft.

Description of drawings

Fig. 1 is a structural representation of the present utility model and as Figure of abstract.

Fig. 2 is the partial enlarged drawing of Fig. 1.

Embodiment

Below in conjunction with accompanying drawing the utility model is elaborated: powder high-speed mixer shaft sealer, comprise main shaft 1, shaft sealing 3, shaft sealing cover 4, agitator 5 and mixing machine shell 6, also comprise by solenoid valve 71 pressure regulator valves 72, pressure gauge 73, gas circuit 7 systems that pipeline 74 is formed, punching on mixing machine shell 6, link 9 inserts wherein, fix with nut, overlap the position of 4 corresponding links 9 in shaft sealing and make a call to a pore 8, link 9 communicates with pore 8 and forms compressed-air actuated passage, one end of described pipeline 74 inserts link 9 and is connected with mixing machine, the source of the gas of another termination pressurized air 10, pressurized air 10 is by air-channel system 7, enters the mixing machine inner chamber through the link 9 compressed-air actuated passage of formation that communicates with pore 8.

By solenoid valve 71 pressure regulator valves 72, pressure gauge 73, the compressed air pressure of source of the gas is controlled at 0.05 MPa, both guaranteed to have in the closed chamber certain malleation, avoid powder granule to enter in main shaft 1 and shaft sealing 3 gaps, prevent from again simultaneously to cause that powder flies upward at the mixing machine inner chamber influences mixed effect owing to compressed air pressure is excessive, flow air has also played cooling action simultaneously, reduces wear.

For making pressurized air inject the mixing machine inner chamber more equably, between agitator 5 and main shaft 1, be provided with centrifugation dish 11, centrifugation dish 11 is circular, interior ring diameter is slightly larger than main shaft 1 diameter and is pressed on the main shaft 1, by locking nut 2 agitator 5 lockings is fixed centrifugation dish 11.Can guarantee like this that leak powder granule in mixing machine intracavity bottom all directions can both be compressed air and blow afloat and do not fall in main shaft 1 and shaft sealing 3 gaps.Centrifugation dish 11 makes and compresses more even air and discharge from periphery in the face of the one side of main shaft 1 is designed to labyrinth shape.

If gas circuit 7 or shaft sealing 3 are broken down, may have powder granule and leak, damage bearing and main shaft.For anti-phenomenon has here caused adverse consequences, be provided with bottom centrifugation dish 12 in the bottom of shaft sealing 3, the interior ring of circular bottom centrifugation dish 12 is L-shaped, is fixed on the main shaft 1 with jackscrew.In case there is micro-dust to reveal, under action of centrifugal force, the powder that leaks can be got rid of to the position away from main shaft, bearing, protected main shaft, bearing to a certain extent.

Claims

1. powder high-speed mixer shaft sealer, comprise main shaft (1), shaft sealing (3), shaft sealing cover (4), agitator (5) and mixing machine shell (6), it is characterized in that: also comprise the air-channel system (7) that connects and composes by solenoid valve (71), pressure regulator valve (72), pressure gauge (73), pipeline (74), described mixing machine shell (6) is provided with link (9), corresponding link (9) is provided with pore (8) on shaft sealing cover (4), one end of described pipeline (74) is connected with link (9), another termination pressurized air (10) source of the gas of pipeline (74).

2. powder high-speed mixer shaft sealer according to claim 1 is characterized in that: be provided with centrifugation dish (11) between described agitator (5) and described main shaft (1).

3. powder high-speed mixer shaft sealer according to claim 2 is characterized in that: described centrifugation dish (11) is a labyrinth shape.

4. powder high-speed mixer shaft sealer according to claim 1 is characterized in that: be provided with bottom centrifugation dish (12) in the bottom of described shaft sealing (3).