DE3047359A1 - Face sliding sealing ring - prevents penetration of harmful substances into lubricating bush and includes fitting of O=ring into bearing shield - Google Patents

Abstract

The face sliding sealing ring is used e.g in cellular wheel locks. It prevents penetration of powdery or pasty materials into the area of the lubricating bush. For this purpose the face sliding sealing ring has an adequately sized sealing wear surface so that a sufficient sealing effect can be attained without a specifically high surface pressure. The face sliding sealing ring is secured against turning by a holding pin and any penetration of media on the circumference of the sealing ring into the area to be protected is prevented by the fitting of an '0' ring into the bearing shield. Any blocking of the cellular wheel rotor as a result of compression or glueing within the rotor shaft area is therefore not possible.

Description

Title: Front rail sealing ring (e.g. for Zelienradschleusen)

Field of application: The invention relates to an end face seal, which has the property, e.g. S. powdery or pasty masses, which to Fixing or sticking and compaction, not read about the stuffing box packing or similar light spots (e.g. with rotary valves). This prevents the rotor shaft from blocking and thus Damage and unintended downtime comes.

State of the art: With conventional rotary valves, the Usually a stuffing box packing is arranged on the rotor shafts. With powdery or pasty masses, which tend to stick, are caused by this very often in operation to malfunctions in the area of the stuffing box packing by here Adhesions or compaction of the media to be conveyed or metered arise and forcibly bring the rotor shaft to a standstill.

Task: The invention is based on the problem of disturbances above to avoid the type described and to ensure a smooth operation. The same problem often occurs with 3-pin wheel sluices in the end shield area, provided that the rotors have closed end faces.

Solution: This object is achieved according to the invention by means of Face mechanical seal on the face of the rotor to prevent penetration of the ulver-shaped or pasty masses (conveyed or metered material) is avoided, so that it does not the incidents described above can occur. The rotor end faces are also proposed to be formed in a star shape, so that the rotor blade end faces outside of the front sliding sealing ring can independently scrape.

Achievable advantages: The advantages that can be achieved with the invention exist in that with the front sliding seal no penetration of powdery or pasty ones Media in the stuffing box area is possible. As a result, the Rotor is not possible and there is no forced standstill or drive overload as a result of the conveying material being pressed or glued. Malfunctions in operation are therefore largely excluded.

Description of the workflow: Using the attached drawing (Principle), DIN A 4, / embodiment) the function is described as follows: They show: 1 end gasket seal 2 compression spring 3 retaining pin 4 O-ring 5 gland packing 6 To iaaufstern on the rotor 7 Rotor blade 8 Lagprschild 9 Throat plate The through the Sluice to be transported powdery or pasty material, which is used for compaction tends to stick, is attached to it by the front sliding seal ring (1); nddrt in the area of the stuffing box packing (5). Consequently, the rotor shaft also remains in operation free of the material to be conveyed or dosed.

The face seal ring is axially attached to the Rotor front wall pressed, better on the starter star of the rotor (6), so that no Material has the opportunity to get through between the resulting slideway.

As a result of the compression spring action, the face seal (1) always independently after; so no additional maintenance of the lock is necessary; except for the regular replacement of the worn mechanical seal rings.

Penetration of the powdery or pasty material into the Stuffing box area over the gap between the end shield (8) and the mechanical seal ring (1) is prevented by a cf ring (4), so the greatest possible protective effect is given and the rotary valve does not get stuck, or as far as possible is avoided. The front sliding sealing ring (1) is secured against turning by a retaining pin (3) secured. Due to the special design of the rotor blades (7) is also given a scraping effect, so that there are no fixations on the bearing plate (8) either result. This ensures that the rotary valve works optimally. the Material assignments for face seal / flow media (powder or pasteus) and start-up star are z. Currently determined by long-term tests and in a further embodiment of the invention defined in more detail. This then becomes an optimal Achieved sliding / sealing behavior, so that the wear is low and the functionality the rotary valve can be optimally designed, with a justifiable additional drive effort as a result of friction between the face seal and the star on the rotor. The required Face seal exchange is due to the optimal material allocation on a Minimum reduced, with the aim that the signs of wear only on the face seal ring - which is replaced after a certain period of operation - affects and so the start-up star remains largely without signs of wear.

Also sticking of the material (powder or paste) on the rotor is due to the specially trained and lightly clean flashings of the rotor hardly given, (9), so that due to the large radii the rotor throat plates ensure that the rotary valve works properly is.

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Claims (1)

Claims: Preamble of the 1st main claim: 1. Front sliding sealing ring (e.g. for rotary valve), characterizing part of claim: 4 characterized in that that this a beef wrestling of powdery or pasty materials in the Stopfhuchsb rich prevented. For this purpose, the face seal ring has a correspondingly designed one Sealing wear surface, so that there is sufficient without a specifically high surface pressure Sealing effect can be achieved. The face seal ring is protected against turning by a Retaining pin secured. Penetration of media on the circumference of the face seal in the space to be protected is avoided by installing an o-ring in the end shield. Blocking of the wheel rotor is therefore due to compaction and sticking not possible in the rotor shaft area. Generic term of the 1st rinter claim: 2nd front sliding sealing ring (e.g. for rotary feeders) according to claim 1. Characteristic part of the claim: thereby characterized in that the front sliding sealing ring infplge compression springs independently on the circumference of the front sliding seal ring b7w. readjusted by a special disc spring and thus a defined wear-sealing effect is achieved. Preamble of the 2nd dependent claim 3. Front sliding seal ring (e.g. for Cell wheel sluice) according to claim 1 - 2, characterizing part of claim: thereby characterized in that the throats of the rotor are provided with large radii and thus have no corners where it would be possible to get stuck. Furthermore, the material selection of the start-up star on the rotor with the face sliding sealing ring so that the wear at the expense of the sliding seal ring.