CN203336103U - Piston balance compensation type high-speed and high-pressure rotary connector - Google Patents

Abstract

The utility model discloses a piston balance compensation type high-speed and high-pressure rotary connector. The rotary connector is composed of two groups of sealing assemblies in the same structure principle and comprises a rotating shaft, bearings, sealing rings and sealing loops. The rotary connector is characterized in that when pressure oil enters the rotary connector through a left end oil opening or a right end oil opening, the pressure oil must enters annular gaps on the two sides of the movable sealing ring and between a piston casing and piston sealing rings through pressure oil channel, and the two piston sealing rings are pushed under the action of the pressure to be tightly attached to the sealing loops to achieve frication sealing. By means of the contact friction sealing structure, the piston balance compensation type high-speed and high-pressure rotary connector is good in sealing performance, has the pressure performance of non-gap sealing, has the rotating flexibility of gas sealing, and is small in oil leakage and pressure loss. The highest rotation speed of the rotary connector is 1500 turns per minute, and the highest pressure of the rotary connector is 25 MPa.

Description

The balanced compensated type high-speed high-pressure rotary joint of piston

Technical field

The utility model relates to a kind of swivel joint, particularly the balanced compensated type high-speed high-pressure rotary joint of a kind of piston.

Background technique

At present allly take the high speed and high pressure class swivel joint that hydraulic oil is medium two kinds of structural types are arranged, the one, the clearance seal formula, flexibly, but its leakage rate is larger in its rotation, and system energy loss is large, can not save energy and reduce the cost; The 2nd, non-clearance seal formula, although it has good pressure maintaining performance, because Sealing is the rubber and plastic based article, the running torque impact that is stressed is larger, rotate dumb, after wearing and tearing after uncompensated, not anti-high speed, sealing part abrasion leakage rate large, the life-span is short.

The model utility content

The utility model, for above-mentioned prior art deficiency, provides a kind of good seal performance, has rotated flexible, the balanced compensated type high-speed high-pressure rotary joint of dredge oil amount a kind of piston little, long service life.

The technical solution of the utility model is: the balanced compensated type high-speed high-pressure rotary joint of a kind of piston, and this swivel joint has the black box of two groups of same structure principles to combine, and comprising: running shaft, the hole card, clutch shaft bearing, the second bearing, the axle card, left shell, auxiliary seal ring, main casing, hydraulic fluid port, the spline pin, static sealing ring, piston packing ring, the first seal ring, the second seal ring, piston shell, hydraulic fluid port, the draining path, right shell, the clutch shaft bearing gland, the second bearing gland, oil sealing, spring, rotary packing ring, the 3rd seal ring, the first pressure oil passage, the second pressure oil passage, outside framework oil seal is characterized in that: described rotary packing ring screw is fixed on running shaft and passes through the 3rd seal ring and rotation axis seal, and piston packing ring is arranged on the rotary packing ring both sides, and friction sealed with rotary packing ring, piston shell is arranged on main casing, in the internal diameter of left shell and right shell, its extension platform gos deep in the piston packing ring internal diameter, and the second seal ring is arranged on external diameter groove and the main casing of piston shell, in the internal diameter of left shell and right shell, the first seal ring is arranged on the internal diameter groove of piston packing ring and external diameter sealing place of piston shell, and auxiliary seal ring is arranged in the two ends groove of main casing and left shell, right shell sealing, spring one end and piston seal loop contacts, the other end is arranged on respectively left shell, main casing, in the spring eye of right shell, the spline pin is to the piston packing ring spline, and the draining hole is arranged on the centre of the two-piston shell of main casing, the inside of the outer spherical bearing of the piston shell of left shell and right shell, the second bearing is arranged between the endoporus of running shaft left part position external diameter and left shell, the axle card is to its axially locating, outside framework oil seal seals it, the hole card is connected the left shell of the second bearing and running shaft, left shell is connected with the main casing screw, clutch shaft bearing is arranged between the internal diameter of the right-hand member external diameter of running shaft and right shell, by the second bearing gland axially locating, running shaft is connected with the clutch shaft bearing gland screw, oil sealing is arranged on clutch shaft bearing gland internal diameter and the sealing of the second bearing gland, and the clutch shaft bearing gland compresses clutch shaft bearing outer ring, clutch shaft bearing gland, right shell and main casing screw are linked to be an integral body.

The utility model has the advantages of and be: when pressure oil enters swivel joint by left end hydraulic fluid port or right-hand member hydraulic fluid port, will enter in the piston shell and the annular spaces between piston packing ring on rotary packing ring both sides by the pressure oil passage, promoting the both sides piston packing ring under the effect of pressure, to be adjacent to rotary packing ring friction sealed, the spring one side active area sum of piston packing ring equates with the area of a friction sealed side, pressure also equates, if while now there is no the active force of spring, piston packing ring should not be in the contact quick condition, the effect of spring is exactly to allow piston packing ring constantly be adjacent to rotary packing ring guarantee friction sealed, so no matter the size of working pressure to friction sealed frictional force be do not have influential, surface friction drag comes from spring fully and exerts pressure, after the piston packing ring wearing and tearing, the function that there is automatic follow-up compensation under the effect of spring, the moderate pressure of spring is the necessary condition that guarantees that the sealing oil film exists, the wearing and tearing that the sealing oil film can alleviate seal ring, thereby extend the working life of swivel joint.Owing to having adopted the contact friction sealing configuration, its good seal performance, existing non-gap sealed pressure maintaining performance is the flexibility of revolution of the formula of gapped sealing again, and dredge oil amount is little, the pressure loss is little, 1500 rev/mins of maximum speeds of the present utility model, maximum pressure 25MPa.

The accompanying drawing explanation

Accompanying drawing is the utility model structural representation

In figure: 1 is running shaft, 2 is the hole card, 3 is clutch shaft bearing, 4 is the second bearing, 5 is the axle card, 6 is left shell, 7 is auxiliary seal ring, 8 is main casing, 9 is hydraulic fluid port, till 10, ship and resell on another market, 11 is static sealing ring, 12 is piston packing ring, 13 is the first seal ring, 14 is the second seal ring, 15 is piston shell, 16 is hydraulic fluid port, 17 is the draining path, 18 is right shell, 19 is the clutch shaft bearing gland, 20 is the second bearing gland, 21 is oil sealing, 22 is spring, 23 is rotary packing ring, 24 is the 3rd seal ring, 25 is the first pressure oil passage, 26 is the second pressure oil passage, 27 is outside framework oil seal

Below in conjunction with accompanying drawing, the utility model is further described:

The balanced compensated type high-speed high-pressure rotary joint of piston, this swivel joint has the black box of two groups of same structure principles to combine, and comprising: running shaft 1, hole card 2, clutch shaft bearing 3, the second bearing 4, axle card 5, left shell 6, auxiliary seal ring 7, main casing 8, hydraulic fluid port 9, spline pin 10, static sealing ring 11, piston packing ring 12, the first seal ring 13, the second seal ring 14, piston shell 15, hydraulic fluid port 16, draining path 17, right shell 18, clutch shaft bearing gland 19, the second bearing gland 20, oil sealing 21, spring 22, rotary packing ring 23, the 3rd seal ring 24, the first pressure oil passage 25, the second pressure oil passage 26, outside framework oil seal 27, it is characterized in that: described rotary packing ring 23 screws are fixed on running shaft 1 by the 3rd seal ring 24 and running shaft 1 sealing, piston packing ring 12 is arranged on rotary packing ring 23 both sides, friction sealed with rotary packing ring 23, and piston shell 15 is arranged on main casing 8, in the internal diameter of left shell 6 and right shell 18, its extension platform gos deep in piston packing ring 12 internal diameters, and the second seal ring 14 is arranged on external diameter groove and the main casing 8 of piston shell 15, in the internal diameter of left shell 6 and right shell 18, the first seal ring 13 is arranged on the internal diameter groove of piston packing ring 12 and external diameter sealing place of piston shell 15, and auxiliary seal ring 7 is arranged in the two ends groove of main casing 8 and left shell 6, right shell 18 sealings, spring 22 1 ends contact with piston packing ring 12, and the other end is arranged on respectively left shell 6, main casing 8, in the spring eye of right shell 18,10 pairs of piston packing ring 12 splines of spline pin, draining hole 17 is arranged on the centre of the two-piston shell 15 of main casing 8, the inside of the outer spherical bearing of the piston shell of left shell 6 and right shell 18, the second bearing 4 is arranged between the endoporus of running shaft 1 left part position external diameter and left shell 6, axle card 5 is to its axially locating, outside framework oil seal 27 is to its sealing, hole card 2 is connected the left shell 6 of the second bearing 4 and running shaft 1, left shell 6 is connected with main casing 8 screws, clutch shaft bearing 3 is arranged between the internal diameter of the right-hand member external diameter of running shaft 1 and right shell 18, by the second bearing gland 20 axially locating, running shaft 1 is connected with clutch shaft bearing gland 19 screws, oil sealing 21 is arranged on clutch shaft bearing gland 19 internal diameters and the second bearing gland 20 sealings, clutch shaft bearing gland 19 compresses clutch shaft bearing 3 outer rings, clutch shaft bearing gland 19, right shell 18 and main casing 8 screws are linked to be an integral body.

The utility model is not limited to above-mentioned mode of execution, and anyone should learn the structural change of making under enlightenment of the present utility model, every with the utlity model has identical or close technological scheme, within all falling into protection domain of the present utility model.

Claims (1)

1. the balanced compensated type high-speed high-pressure rotary joint of piston, this swivel joint has the black box of two groups of same structure principles to combine, and comprising: running shaft (1), hole card (2), clutch shaft bearing (3), the second bearing (4), axle card (5), left shell (6), auxiliary seal ring (7), main casing (8), hydraulic fluid port (9), spline pin (10), static sealing ring (11), piston packing ring (12), the first seal ring (13), the second seal ring (14), piston shell (15), hydraulic fluid port (16), draining path (17), right shell (18), clutch shaft bearing gland (19), the second bearing gland (20), oil sealing (21), spring (22), rotary packing ring (23), the 3rd seal ring (24), the first pressure oil passage (25), the second pressure oil passage (26), outside framework oil seal (27), it is characterized in that: it is upper by the 3rd seal ring (24) and running shaft (1) sealing that described rotary packing ring (23) screw is fixed on running shaft (1), piston packing ring (12) is arranged on rotary packing ring (23) both sides, friction sealed with rotary packing ring (23), piston shell (15) is arranged on main casing (8), in the internal diameter of left shell (6) and right shell (18), its extension platform gos deep in piston packing ring (12) internal diameter, and the second seal ring (14) is arranged on external diameter groove and the main casing (8) of piston shell (15), in the internal diameter of left shell (6) and right shell (18), the first seal ring (13) is arranged on the internal diameter groove of piston packing ring (12) and external diameter sealing place of piston shell (15), and auxiliary seal ring (7) is arranged in the two ends groove of main casing (8) and left shell (6), right shell (18) sealing, spring (22) one ends contact with piston packing ring (12), and the other end is arranged on respectively left shell (6), main casing (8), in the spring eye of right shell (18), spline pin (10) is to piston packing ring (12) spline, and draining hole (17) are arranged on the centre of the two-piston shell (15) of main casing (8), the inside of the outer spherical bearing of the piston shell of left shell (6) and right shell (18), the second bearing (4) is arranged between the endoporus of running shaft (1) left part position external diameter and left shell (6), axle card (5) is to its axially locating, outside framework oil seal (27) is to its sealing, and hole card (2) is the second bearing (4), left shell (6) and running shaft (1) are connected, left shell (6) is connected with main casing (8) screw, clutch shaft bearing (3) is arranged between the internal diameter of the right-hand member external diameter of running shaft (1) and right shell (18), by the second bearing gland (20) axially locating, running shaft (1) is connected with clutch shaft bearing gland (19) screw, oil sealing (21) is arranged on clutch shaft bearing gland (19) internal diameter and the second bearing gland (20) sealing, clutch shaft bearing gland (19) compresses clutch shaft bearing (3) outer ring, clutch shaft bearing gland (19), right shell (18) and main casing (8) screw are linked to be an integral body.