SU382815A1 - ROTARY CONNECTION OF HYDROMONITOR - Google Patents

Description

one

The invention is intended for hydraulic monitors used in the hydraulic mining of minerals.

Swivel joints of hydromonitors are known, including a trunnion, a clip, filters and sealing cuffs.

The proposed device is characterized in that it is provided with a floating gland ring that contacts one side with the cuff and the other into the lubricating cavity.

This allows a longer seal life.

The drawing shows the structural scheme of the proposed rotating joint of the jetting machine.

The swivel joint consists of a trunnion I, protected from wear by the sleeve 2, the sleeve 3, the sealing sleeves 4, locking the working fluid, the filters 5, cleaning the working fluid from large abrasive particles.:.;

To reduce the pressure difference acting on the cuffs 4, and for constant lubrication of their bearing part, floating bearing rings 6 are integrated into the holder 3. With the smaller area, the rings 6 are in contact with the cuffs 4, the other end of the rings 6 together with the holder 3 and its replaceable lid 7 forms a cavity 8 filled with a lubricant. The lubricant in the cavity 8 is held by the cuffs 9 and the sealing rings 10. In order to timely determine the output from

The seals 4 of the cavity 8 through the holes 11 are connected to pressure sensors 12 installed on the monitor or on the control panel. The pressure sensor consists of a valve-piston 13 and a spring 14, tared at a certain pressure. Injection of lubricant into the cavity 6 is carried out with an oil-press 15.

The gland ring 6 is sealed to the outside diameter by ring 16, and

It has a certain gap with the sleeve 2. Due to the fact that the frictional forces on the outer and inner diameters are unequal, and the latter is much smaller (there is no sealing ring, less contact area),

the rings 6, together with the cuffs 4, can be rotated only relative to the axle / and sleeve 2, while remaining stationary relative to the sleeve 3. When supplying high-pressure technical

water to the jetting machine (not shown) it fills the sealing chamber 17. The pressure of the cuff 4 cleaned by the water filters 5 presses its sealing edges to the circumference 3 and the sleeve 2, and

to the gland ring 6. Rings 6, shifting

under the pressure of water towards the chambers, they create a pressure less than that of water. The lubricant from the cavity 8 is squeezed out into the gap between the ring 6 and the sleeve 2 and extends to the cuff 4. As a result, the water pressure is somewhat compensated for by the lubricant pressure, the pressure difference acting on the cuffs in the gap decreases, the bearing part of the cuffs is lubricated, and the friction training mode is improved. This dramatically increases the service life.

In case the cuff 4 has failed, the oil pressure in the cavity 8 rises, the spring 14 is not designed for this pressure, is compressed by the valve-piston 13 and its rod

extends from sensor 12. This is a signal that cuff 4 needs to be replaced.

Subject invention

The swivel connection of the monitor, including the axle of the monitor and the holder with a lubricating cavity between them, filters and sealing cuffs, characterized in that, in order to increase the service life of the seals, it is equipped with a floating retaining ring that contacts one side with the cuff and the other is included in lubricating cavity.

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