CN2176465Y

CN2176465Y - Mechanical sealing unit of metal floating ring bellows

Info

Publication number: CN2176465Y
Application number: CN 93211329
Authority: CN
Inventors: 陈汝灼; 董为一; 石富江
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-04-28
Filing date: 1993-04-28
Publication date: 1994-09-07
Anticipated expiration: 2003-04-28

Abstract

The utility model relates to a mechanical sealing device of a metal floating ring bellows, which is mainly composed of a static ring, a movable ring, a metal bellows, two ends of which are respectively mutually connected with a front ring and a rear seat, and a sealing ring. The mechanical sealing device is characterized in that the end faces of the movable ring and the front ring joint in a floating mode. A driving member for transferring torque is arranged between the movable ring and the front ring, and the floating jointing connection drive is formed. Because in the utility model the movable ring and the front ring adopt the floating jointing connection drive, the high temperature exfoliation and the low-temperature deformation or the brittle fracture phenomenon of the traditional hot-inlaid movable ring can not occur. The sealing effect of the high and low temperature condition is improved. The sorting range of the movable ring is enlarged.

Description

Mechanical sealing unit of metal floating ring bellows

The utility model relates to the mechanical seal field, specifically a kind of floating ring metal bellows mechanical seal device.

In the existing metal bellows mechanical seal, the combination rotating ring adopts heat edge structure, because the edge ring is different with the thermal expansion coefficient of edge seat material, edge seat swell increment edge ring " heat comes off " problem occurs greater than edge ring swell increment when being heated.At cryogenic conditions, edge seat contour projector causes edge annular strain or embrittlement greater than edge ring contour projector.These two kinds of phenomenons all cause seal failure.

In view of the above-mentioned defective of existing in prior technology, the purpose of this utility model provides a kind of metal bellows mechanical seal device that has not the unsteady associative ring of the low-temperature deformation that can high temperature comes off.

To achieve these goals, technical solution of the present utility model mainly is made up of with metal bellows and seal ring that preceding ring links to each other with back seat respectively stationary ring, the combination rotating ring that floats, two ends, the unsteady applying of end face that it is characterized in that rotating ring and preceding ring, be provided with the driving component of transmitting torque between the two, form the connection transmission of floating and fitting.

Because rotating ring and preceding ring adopt the connection transmission of fitting of floating in the utility model, so it compared with prior art has following advantage:

1. the showing of low-temperature deformation or embrittlement can not appear that high temperature comes off and in the associative ring that floats

2. the thermal expansion coefficient to rotating ring and preceding ring does not have specific (special) requirements, has widened the selectable range of material.

Below in conjunction with accompanying drawing and two possible embodiments the utility model is explained in further detail, so that the effect that the public further understands above-mentioned purpose of the present utility model and can reach, grasp better and implement technological means of the present utility model, but other derivative strucure of the present utility model is not limited by described embodiment.

Description of drawings:

Fig. 1 is the structural representation of a kind of specific embodiments of the utility model, also is the user mode figure of this embodiment simultaneously; Demonstrate the use and the assembly method of the present embodiment among the figure; Double dot dash line is other parts that are used with the present embodiment among the figure; Numbering 1a-rotating ring among the figure, 1b-drive sleeve, ring before the 1c-, 1d-metal bellows, 1e-back seat, 1f-pad, the 2a-stationary ring, 2b-seal ring, 3a-tightening seat, 3b-screw, 3c-screw, 4a-screw, 4b-makes up gland, 4c-pad, 4d-screw, 4e-pad, 4f-casing.

Fig. 2 is the A-A sectional view of Fig. 1, and the numbering title is identical with Fig. 1 among the figure.

Fig. 3 is the structural representation of the another kind of specific embodiments of the utility model; Numbering 1a-rotating ring among the figure, ring before the 1c-, 1g-pin, 2a-stationary ring, 3a-tightening seat; Double dot dash line is the rotatingshaft that is used with embodiment among the figure.

Example 1:

See figures.1.and.2 and select for use wear-resisting cemented carbide to make rotating ring (1a), select for use stainless steel to make preceding ring (1c), process 6 uniform grooves vertically on the periphery of rotating ring (1a) and preceding ring (1c); Select for use Stainless Steel Tube to make drive sleeve (1b), and adopt the method for extruding that drive sleeve (1b) is suppressed 6 uniform internal lobes vertically, described internal lobes and rotating ring (1a) and preceding ring (1c) are gone up set groove and are complementary; With reference to Fig. 2, drive sleeve (1b) sky is enclosed within on rotating ring (1a) and the preceding ring (1c), rotating ring (1a) and preceding ring (1c) all can be in drive sleeve (1b) axial free movement, but the constraint that is subjected to internal lobes can not be rotated.With reference to Fig. 1, rotating ring (1a), preceding ring (1c) all must carry out abrasive machining with the faying surface of stationary ring (2a).

Other component adopt technique known to make in this example.

Example 2:

With reference to Fig. 3, be equipped with 6 blind holes on the end face that rotating ring of cemented carbide (1a) and stainless preceding ring (1c) fit, wear a pin (1g) in each blind hole respectively, pin (1g) and blind hole one end are for movingly, and the other end is stationary fit.

With reference to Fig. 3, above-mentioned enforcement means in addition are identical with example 1 in this example.

Claims

1, a kind of floating ring metal bellows mechanical seal device, mainly formed with metal bellows (1d) and seal ring (2b, 1f) that preceding ring (1c) links to each other with back seat (1e) respectively by stationary ring (2a), rotating ring (1a), two ends, it is characterized in that rotating ring (1a) and the unsteady applying of the end face of preceding ring (1c), be provided with the driving component of transmitting torque between the two, form the connection transmission of floating and fitting.

2, a kind of floating ring metal bellows mechanical seal device according to claim 1, it is characterized in that the drive sleeve (1b) of described driving component for the band internal lobes, empty cover within it rotating ring (1a) and the periphery of preceding ring (1c) be equipped with the groove that is complementary with described internal lobes, form the float connection transmission of applying of a kind of transmission shell type.

3, a kind of floating ring metal bellows mechanical seal device according to claim 1, it is characterized in that described driving component is pin (1g), be equipped with the blind hole of prick post pin (1g) on the end face that rotating ring (1a) and preceding ring (1c) fit, form the connection transmission that a kind of pin-type load floats and fits.