DE2042072C3 - Mechanical seal - Google Patents

Description

30th

The invention relates to: a mechanical seal in the form of a sliding ring diaphragm cartridge which enables the joint installation of all sliding ring parts, the housing of which can be fastened on or in the machine housing to be sealed and its bushing, which is arranged in the seal housing and carries the circumferential sealing parts, on the shaft, also on the outer end face of the housing attached, engaging in an annular groove of the socket, the axial locking of both parts to each other during the E ^: n- and expansion serving retaining washers.

Mechanical seals of this type, as z. B. are known from British patent specification 1 154 113 have the disadvantage that the retaining washers which are used to axially lock the parts mentioned do not can easily remain on the seal housing, d. H. are not inextricably linked to this. Avoiding this disadvantage is the object of the invention, according to which the solution consists in that said retaining washers are eccentric to bolts arranged in the end face of the housing the bzsv. Pivotable disks are formed from the locked position.

The advantage of the retaining disks, which can be pivoted in this way on the end face of the sealing cartridge consists in the fact that these can remain on the seal cartridge housing or cannot be lost are connected to this, with which the conventional · assembly and rotor adjustment methods for work machines, ζ. B. centrifugal pumps, with appropriate corresponding seals are further improved.

The invention is illustrated using an exemplary embodiment with reference to FIGS. 1 to 5 described.

According to FIG. 1 there is the connection of the seal cartridge 7 with the rotor shaft, for. B. a circle 6g selpümpe, through the two eccentric bolts in the end cover i of the housing 8 surrounded cartridge housing? pivotable and oppositely arranged retaining disks 2, which fit into a groove provided in the shaft bushing 3. The socket 3 is in turn on the axially fixed on one side by a locking ring 4 and on the other side by a shaft collar 5. A key 6 transmits the torque to the rotating mechanical seal parts, which with the stationary sealing parts in the seal cartridge housing? are housed. This is supported on the male receptacle housing 8 via a flange and attached, over which, with the appropriate position of the retaining washers 2, the rotor system cited as an example on the centrifugal pump is set. After a first and one-time adjustment process, which must be carried out with several adjustment screws 9 is. the runner system is connected to a two-part spacer ring cut to the setting dimension Λ ' 10 supported and fastened with the screws II in the cartridge receiving housing 8.

The standstill seal 13 connected upstream of the seal cartridge then comes into action when due to Inspection or repair work the mechanical seal is to be removed. This happens by that a flexible bellows is pressed against the shaft by means of applied pressure and thus against seals the atmosphere. This measure allows the pump to be released or emptied omitted, which of course has a particularly favorable effect on the inspection time.

The steps involved in the initial setting of a pump rotor, e.g. vertically arranged, are as follows:

1. According to Fig. 2, the preassembled seal cartridge 7 is in the lowest rotor position (see Direction of arrow) into the cartridge housing 8 until the protective shaft sleeve on the Wellenbuud 5 comes to the Anlajp. The retaining washers 2 are in the working position (FIG. 5, position 14).

2. In this position, the seal cartridge 7 with the rotor system is through the locking ring 4, see Fig. 1, axially fixed.

3. The play between the cartridge flange and the housing "y" is now measured and registered (Fig. 2).

4. Then the runner is raised to its highest point with the adjusting screws 9 over the cartridge flange Position (see arrow, Fig. 3) raised.

5. The clearance between the cartridge flange and the housing is measured in this position and registered.

6. From the measured games: Y and Z the final Absland X is now calculated.

7. The prefabricated ring 10 is cut to length X , halved and placed on the cartridge housing 8.

8. The cartridge flange is secured with the adjustment screws 9 is lowered until it fits perfectly and evenly on the spacer ring 10

c, (Fig. 1) rests. The adjusting screws are relieved in this position.

9. Now the sealing cartridge 7 with the fastening screws 11 fastened in the housing 8.

10. Subsequently, the runner system in the adjustment of AxialJagerung by ² is / io raised mm to ³ Ao, so that the holding disks 2 removed in the operational unit of the groove of the shaft bushing 3 and thus in loading

equestrian position can be brought (Fig. 4 and 5, position 15)

The rotor setting after an inspection of the mechanical seal can be carried out without any measuring work (Fig. 1). The cartridge flange is raised to the required setting dimension X immediately after the locking ring 4 has been inserted. The setting ring 10 is placed under the flange, which is immediately drained off again and fastened with the screws 11.

1 sheet of drawings

Claims (1)

Claim: Mechanical seal in the form of a mechanical seal cartridge which enables the joint installation of all mechanical seal parts, the housing of which can be fastened to the shaft on or in the machine housing to be sealed and its bushing, which is arranged in the seal housing and carries the circumferential sealing parts. with retaining disks attached to the outer end face of the housing, engaging in an annular groove of the bushing and serving to axially lock both parts to one another during installation and removal, characterized in that the hook disks (2) are eccentric around the end face of the housing (7 ) disordered bolts in or out of the A iretierstellung pivotable discs are formed.