Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16J—PISTONS; CYLINDERS; SEALINGS
  • F16J15/00—Sealings
  • F16J15/16—Sealings between relatively-moving surfaces
  • F16J15/34—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member
  • F16J15/3404—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member and characterised by parts or details relating to lubrication, cooling or venting of the seal
  • F16J15/3408—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member and characterised by parts or details relating to lubrication, cooling or venting of the seal at least one ring having an uneven slipping surface
  • F16J15/3432—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member and characterised by parts or details relating to lubrication, cooling or venting of the seal at least one ring having an uneven slipping surface the geometry of the surface being able to vary during operation
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16J—PISTONS; CYLINDERS; SEALINGS
  • F16J15/00—Sealings
  • F16J15/16—Sealings between relatively-moving surfaces
  • F16J15/34—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member
  • F16J15/3464—Mounting of the seal
  • F16J15/3468—Means for controlling the deformations of the contacting faces

Definitions

• the present invention relates to a hydrostatic mechanical seal for sealing a pressurized operating space between a rotating and a stationary machine part with an axially displaceable split slide ring and a one-piece mating ring, with two working throttle gaps arranged in series between the rings of both the slide ring and the counter-ring each have two flat surfaces, such that when the slide ring is axially displaced, the gaps open or close in opposite directions, the parts which are moved relative to one another are integrated into one another and the working throttle gap is arranged axially opposite one another are.
• Such known seals can expediently be used at pressures of the usual order of magnitude for the media to be sealed.
• mechanical seals of this type already have a compact design (DE-OS 20 43 844)
• the amount of leakage increases due to the existing pressure fields due to deformation of the sealing parts, as a result of which undesired losses in performance and the functionality of the control mechanism are impaired.
• the present application therefore aims to reduce the leakage amount to an acceptable level even at maximum pressures and to ensure functional reliability.
• the invention is therefore based on the object of counteracting pressure-related deformation of the sealing parts in a pressure-dependent manner in such a way that the sum of the gap widths of the working restrictor gaps (sealing gaps) and their position remains essentially unchanged, while maintaining the simplest construction and the same installation volume as with uncompensated seals.
• a radial compensation groove is formed in part of the counter-race, the compensation groove being connected to a pressure chamber by means of a connecting line and the force of the deformation force of the intermediate pressure generated by the pressure in the compensation groove Intermediate pressure groove counteracts.
• the compensating groove is integrated in a deformable ring part of the counter-race. Which means that an increase in the installation dimensions is not necessary.
• Fig. 2 shows an embodiment. 1 with pressure compensation according to the invention
• a shaft 1 penetrates a housing 2 in a bore 3, a pressure difference or a pressure drop existing between the space 4 (high pressure side) and the space 5 (low pressure side).
• the resulting leakage flux thereby .If reduced by the inserted into the bore 3 and 'retained by the axial stop face seal 6 to a minimum.
• the mechanical seal essentially consists of the three-part mating ring 7 and the one-part sliding ring 8.
• the three-part embodiment of the mating ring 7 is selected only by way of example and for manufacturing reasons. With a suitable manufacturing method, which guarantees the necessary plane parallelism, the counter ring can also be in two pieces.
• the mating ring 7 sets the mating ring 7 from the parts 9, 10 and the spacer ring
• cal seal 14 allows the sliding ring a slight axial movement between the mating ring parts 9 and 10.
• a working throttle gap 15 pressure-side gap
• 16 leak-side gap
• the axially opposite working throttle gaps 15, 16 are connected to one another via the annular channel 17 and the intermediate pressure groove 18. With 19 the ring-shaped feed around the high pressure side 4 is designated.
• FIG. 2 describes a device according to the invention
• a radial compensating groove 20 is formed directly in part 9 of the counter ring 7. This compensating groove 20 divides the mating ring part 9 into the regions 9a, 9b and is completely closed or limited by an elastic seal 21 which is supported on the ring 22.
• the compensating groove 20 is connected to the intermediate pressure groove 18 via a connecting line 23.

Landscapes

• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Physics & Mathematics (AREA)
• Geometry (AREA)
• Mechanical Sealing (AREA)
• Sealing Devices (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=6335420

Family Applications (1)

Country Status (2)

Cited By (2)

Families Citing this family (1)

Citations (3)

Family Cites Families (4)

• 1987
  • 1987-09-07 DE DE19873729929 patent/DE3729929A1/de active Granted
• 1988
  • 1988-09-05 WO PCT/DE1988/000546 patent/WO1989002554A1/de unknown

Patent Citations (3)

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