JP2001165026A5 - Water sealing device for hydraulic machinery and its hydraulic machinery - Google Patents

Description

[0001]
[Technical field to which the invention belongs]
The present invention relates to a water sealing device of a hydraulic machine that seals water by arranging it on the outer periphery of a rotating shaft in a hydraulic device such as a water turbine or a pump water turbine, and the hydraulic machine thereof.

An object of the present invention is to prevent damage to a sliding member due to deformation or vibration of a packing box as described above, and to provide a highly reliable water sealing device for a hydraulic machine and the hydraulic machine thereof.

The twelfth feature of the present invention is that a cushioning material is inserted between the low pressure side surface of the packing and the inner surface of the packing box. By doing so, it is possible to reduce the load and impact on the sliding member due to the deformation and vibration of the packing box.
A thirteenth feature of the present invention is to provide a hydraulic machine provided with a water sealing device for the hydraulic machine.

0025
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, a water sealing device for a hydraulic machine of the present invention and an embodiment of the hydraulic machine will be described with reference to FIGS. 1 to 15.

FIG. 1 is a vertical cross-sectional view showing a water sealing device for a hydraulic machine of the present invention and a first embodiment of the hydraulic machine.

Claims (13)

  A packing box that opens toward the rotation main shaft is provided on the outer periphery of the rotation main shaft. The packing box is pressed toward the rotation main shaft by pressing means and slides on the rotation main shaft to seal water. In the water sealing device of a hydraulic machine provided with a packing, the packing includes a base and a sliding member fitted to the base, and both end faces in the circumferential direction of the sliding member are the center of the rotation main shaft. A water-sealing device for a hydraulic machine, characterized by being parallel to the line.   2. The water sealing device for a hydraulic machine according to claim 1, wherein the pedestal of the packing has a thermal conductivity larger than that of the sliding member.   The sliding member of the packing is formed in a concave shape, a protrusion is provided on a part of the pedestal, and a concave recess portion of the sliding member is fitted into the protrusion to constitute the packing. Item 14. A water-sealing device for a hydraulic machine according to Item 1.   The sliding member of the packing is formed in a concave shape, two sliding members formed in the concave shape are arranged in the circumferential direction, and two protrusions are provided in the circumferential direction on one pedestal corresponding to the sliding members. 2. The water sealing device for a hydraulic machine according to claim 1, wherein the two sliding members are fitted to two protrusions, and a minute gap is provided between the two sliding members.   The packing is evenly arranged in the circumferential direction, and a slight gap is provided between adjacent packings on the innermost circumferential surface that slides on the rotating main shaft, and the circumferential direction of the packing in a wedge-shaped space formed between the packings The water sealing device for a hydraulic machine according to claim 1, further comprising a detent for preventing movement.   The packing is evenly arranged in the circumferential direction, and a slight gap is provided between the packing and the adjacent packing on the innermost circumferential surface that slides, and the circumferential direction of the packing is formed in a wedge-shaped space formed between the packings. A detent is arranged from the inner peripheral surface of the sliding member so that when the sliding member is fitted to the projecting portion of the pedestal, the sliding member is always slid with only the sliding member when the sliding member is fitted to the projecting portion of the pedestal. Is provided on the outer diameter side of the pedestal side surface, and a circumferential protrusion projecting in the circumferential direction is provided on the outer peripheral side of the pedestal side surface. 2. The hydraulic machine seal according to claim 1, wherein the circumferential protrusion is engaged with the detent before the minute portion is worn, so that the pedestal cannot move further to the inner diameter side. Water equipment.   The hydraulic machine according to claim 1, wherein two rows of parallel grooves in the radial direction are provided on the high-pressure side of the pedestal of the packing, and pins that engage with the grooves are provided on inner surfaces of the packing box facing each other. Water sealing device.   Two rows of parallel grooves in the radial direction are provided on the high-pressure side of the base of the packing, and pins that engage with the grooves are provided on the inner surface of the packing box opposite to each other, and the head of the packing is implanted in the packing box. The sealing device for a hydraulic machine according to claim 1, wherein the sealing device is formed to be eccentric with respect to the root portion.   When the sliding member is fitted to the projecting portion of the pedestal, the projecting portion is positioned on the outer diameter side from the inner peripheral surface of the sliding member so that only the sliding member always slides with the rotating main shaft. A wear allowance is provided, and a groove is formed in the pedestal from the inner diameter side end of the pedestal to a predetermined position radially outward, and a pin engaging with the groove is installed in the opposing packing box, and the sliding member The distance from the pin to the groove end portion of the pedestal is shorter than the wear allowance, and when the sliding member moves to the inner diameter due to aging wear, the pin is removed before the wear allowance is worn. 2. The water-sealing device for a hydraulic machine according to claim 1, wherein the groove terminal portion is reached, and the sliding member is prevented from moving further toward the inner diameter side.   The packing is evenly arranged in the circumferential direction, a slight gap is provided between adjacent packings on the innermost surface that slides, and a detent that prevents circumferential movement of the packing in a wedge-shaped space formed between the packings A groove is formed in the pedestal from the inner diameter side end of the pedestal to a predetermined position radially outward, and a pin engaging with the groove is installed in the opposing packing box, and the sliding member is worn over time. 2. The water sealing device for a hydraulic machine according to claim 1, wherein, even if it is moved to the inner diameter, the inner diameter side cannot be moved beyond a predetermined position.   The packing is configured such that when the sliding member is fitted to the protrusion of the pedestal, the surface on the high-pressure side of the sliding member protrudes slightly in the axial direction from the pedestal. The water sealing device for a hydraulic machine according to claim 1.   The water sealing device for a hydraulic machine according to claim 1, wherein a buffer material is inserted between a low pressure side surface of the packing and an inner surface of the packing box.   The hydraulic machine provided with the sealing device of the hydraulic machine of any one of Claim 1 thru | or 12.