CN214789636U - Rotary joint suitable for lead to steam high rotational speed low moment of torsion - Google Patents

Abstract

The utility model provides a rotary joint suitable for logical steam high rotational speed hangs down moment of torsion, including the rear end housing, the dish type ring, hollow shaft and casing, the medial surface mounting end face seal ring of hollow shaft, end face seal ring hugs closely the cooperation with the dish type ring and constitutes sealed pairing, the terminal surface that the dish type ring was hugged closely with the end face seal ring sets up the step groove, with the area of contact who reduces sealing end face, the dish type ring sets up in the counter bore of rear end housing, little spring mounting is in the rear end housing of dish type ring top, with the roof pressure live the dish type ring and play the rotary seal effect. The utility model adopts a balanced sealing structure, has small friction resistance, and replaces the prior spherical sealing structure form to realize the high rotating speed of the rotary joint; through reducing the sealed width on the dish type ring, design a step groove on the dish type ring promptly, reduce the area of contact of sealed terminal surface, effectively utilize balance principle, the steam medium that can significantly reduce is to the terminal surface specific pressure of rotary seal face to rotary joint's the rotation moment of torsion that can significantly reduce.

Description

Rotary joint suitable for lead to steam high rotational speed low moment of torsion

Technical Field

The utility model relates to a rotary joint technical field, specifically speaking relates to a rotary joint suitable for logical steam high rotational speed hangs down moment of torsion.

Background

Because ordinary steam rotary joint uses spherical seal structure form mostly in the existing market, the rotational speed of use is slow, and rotation torque is big, all need drive through motor cooperation reduction gear etc. and rotary joint still often appears phenomenon such as friction abnormal sound in the use. The large rotation torque of the rotary joint is mainly caused by the large sealing contact surface, the large specific spring pressure of the sealing surface and the like. In the transmission process, a larger motor and a reducer are combined to achieve transmission, and in the rotation process, larger abnormal sound exists to bring environmental influence to the surroundings, and energy conservation and environmental protection cannot be achieved. The steam-passing rotary joint often expands under high-temperature steam due to improper use of materials on the auxiliary sealing ring, so that the compensation of sealing elasticity is influenced, the sealing pressure of the rotary joint is insufficient, and the rotary joint leaks.

SUMMERY OF THE UTILITY MODEL

In order to solve the defects of the prior art, the utility model aims to provide a rotary joint suitable for lead to steam high rotational speed low moment of torsion to overcome the defect among the prior art.

In order to achieve the purpose, the utility model provides a rotary joint suitable for lead to steam high rotational speed low moment of torsion, rotary joint includes rear end housing, dish type ring, hollow shaft and casing, wherein, the hollow shaft is installed in the casing through two bearings, separates with the bearing spacer between two bearings, and the inboard of two bearings is blocked fixedly through the circlip for the axle, and the outside of two bearings is blocked fixedly through the circlip for the hole; the end face sealing ring is mounted on the end face of the inner side of the hollow shaft and is in close fit with the disc-shaped ring to form a sealing pair, a step groove is formed in the end face, close to the disc-shaped ring, of the disc-shaped ring, the contact area of the sealing end face is reduced, the disc-shaped ring is arranged in a counter bore of the rear end cover, the small spring is mounted in the rear end cover above the disc-shaped ring, and the small spring presses the disc-shaped ring to achieve a rotary sealing effect; the rear end cover is connected with the shell through a hexagon socket screw.

By adopting the technical scheme, the design of a balanced sealing structure is adopted, the friction resistance is small, and the prior spherical sealing structure form is replaced, so that the high rotating speed of the rotary joint is realized; through reducing the sealed width on the dish type ring, design a step on the dish type ring promptly, reduce the area of contact of sealed terminal surface, effectively utilize balance principle, the steam medium that can significantly reduce is to the terminal surface specific pressure of rotary seal face to rotary joint's the rotation moment of torsion that can significantly reduce.

As right the rotary joint's that is applicable to logical steam high rotational speed low moment of torsion further explanation, preferably, the cover is equipped with steam type O type circle on the outer periphery of dish type circle, cooperation rear end cap inner wall is hugged closely to steam type O type circle to constitute supplementary seal.

Through above-mentioned technical scheme, the auxiliary seal is constituteed with steam type O type circle to the rear end cap inner wall, further improves the sealing performance between dish type ring and the rear end cap.

As a further description of the rotary joint suitable for supplying steam with high rotation speed and low torque of the present invention, preferably, the steam type O-ring is an FEPM fluororubber O-ring.

Through above-mentioned technical scheme, through using dedicated steam type O type circle, FEPM fluororubber O type circle promptly, replace ordinary FKM fluororubber O type circle before, it is littleer to expand under high temperature, more resistant inflation, corrosion-resistant, resistant sclerosis, makes supplementary sealing resistance littleer, more is favorable to the elasticity compensation of sealed face to be favorable to rotary seal.

As right the rotary joint suitable for logical steam high rotational speed low moment of torsion's further explanation, preferably, the dish type ring passes through the elasticity cylindric lock to be fixed on the rear end cover, plays the effect that makes the dish type ring spline.

Through above-mentioned technical scheme, the elasticity cylindric lock is fixed the dish type ring on the rear end lid, plays the effect that makes the dish type ring stall, prevents to rotate along with the hollow shaft at rotatory in-process together.

As a further explanation of the rotary joint applicable to the high-speed low-torque steam-feed rotary joint of the present invention, preferably, a straight-through pressure oil injection cup is installed on the housing corresponding to a position between the two bearings, and is used for filling the bearing with lubricating grease.

Through the technical scheme, the straight-through pressure oil injection cup is used for injecting lubricating grease to the bearing in the shell, so that the bearing is protected.

The utility model has the advantages as follows: the utility model adopts the design of a balanced type sealing structure, has small friction resistance, and replaces the prior spherical sealing structure form to realize the high rotating speed of the rotary joint; through reducing the sealed width on the dish type ring, design a step on the dish type ring promptly, reduce the area of contact of sealed terminal surface, effectively utilize balance principle, the steam medium that can significantly reduce is to the terminal surface specific pressure of rotary seal face to rotary joint's the rotation moment of torsion that can significantly reduce.

Drawings

Fig. 1 is a schematic structural diagram of the rotary joint suitable for introducing steam, high rotating speed and low torque of the present invention.

FIG. 2 is an enlarged view of a portion of I in FIG. 1.

Fig. 3 is a partial enlarged view of ii in fig. 1.

In the figure: 1. the device comprises a rear end cover, 2, a steam O-shaped ring, 3, an inner hexagonal screw, 4, a small spring, 5, a disc-shaped ring, 6, an end face sealing ring, 7, a shaft elastic retainer ring, 8, a straight-through type pressure oil injection cup, 9, a bearing, 10, a bearing spacer bush, 11, a shell, 12, a hole elastic retainer ring, 13, a hollow shaft, 14, an elastic cylindrical pin, 15 and a step groove.

Detailed Description

In order to further understand the structure, characteristics and other objects of the present invention, the following detailed description is given with reference to the accompanying preferred embodiments, which are only used to illustrate the technical solution of the present invention and are not intended to limit the present invention.

As shown in fig. 1, fig. 1 is a schematic structural view of a rotary joint suitable for introducing steam, having high rotation speed and low torque according to the present invention; one such rotary joint suitable for steaming, high speed, and low torque applications includes a rear end cap 1, a disc ring 5, a hollow shaft 13, and a housing 11. The hollow shaft 13 is installed in the housing 11 through two bearings 9, the two bearings 9 are separated by a bearing spacer 10, the inner sides of the two bearings 9 are clamped and fixed by the elastic collar 7 for the shaft, and the outer sides of the two bearings 9 are clamped and fixed by the elastic collar 12 for the hole. An end face sealing ring 6 is mounted on the end face of the inner side of the hollow shaft 13, the end face sealing ring 6 is in close fit with the disc-shaped ring 5 to form a sealing pair, and a step groove 15 is formed in the end face of the disc-shaped ring 5, which is in close fit with the end face sealing ring 6, to reduce the contact area of the sealing end face, as shown in fig. 3. The disc-shaped ring 5 is arranged in a counter bore of the rear end cover 1, the small spring 4 is arranged in the rear end cover 1 above the disc-shaped ring 5, and the small spring 4 is pressed against the disc-shaped ring 5 to play a role of rotary sealing, as shown in fig. 2. The rear end cover 1 is connected with the shell 11 through a hexagon socket head cap screw 3. The outer circumference of the disc-shaped ring 5 is sleeved with a steam O-shaped ring 2, and the steam O-shaped ring 2 is tightly attached to the inner wall of the rear end cover 1 to form auxiliary sealing, so that the sealing performance between the disc-shaped ring and the rear end cover is further improved. The steam O-shaped ring 2 is an FEPM fluororubber O-shaped ring, and replaces the prior ordinary FKM fluororubber O-shaped ring by using a special steam O-shaped ring, so that the expansion is smaller at high temperature, the expansion is more resistant, the corrosion is resistant, the hardening is resistant, the auxiliary sealing resistance is smaller, the elastic compensation of a sealing surface is more facilitated, and the rotary sealing is facilitated. The disc-shaped ring 5 is fixed on the rear end cover 1 through the elastic cylindrical pin 14, the disc-shaped ring 5 stops rotating, the disc-shaped ring is prevented from rotating along with the hollow shaft in the rotating process, and the elastic cylindrical pin 14 is installed in the rear end cover 1 below the disc-shaped ring 5. A straight-through type pressure oil filling cup 8 is arranged on the shell 11 corresponding to the position between the two bearings 9 and is used for filling lubricating grease into the bearings 9 and protecting the bearings.

The rotary joint is a rotary joint which needs steam for heating, has high rotating speed and low torque and is arranged on a driven roller of equipment, and the rotary joint is designed by adopting a balanced sealing structure, has small friction resistance and replaces the prior spherical sealing structure form to realize the high rotating speed of the rotary joint; through reducing the sealed width on the dish type ring, design a step on the dish type ring promptly, reduce the area of contact of sealed terminal surface, effectively utilize balance principle, the steam medium that can significantly reduce is to the terminal surface specific pressure of rotary seal face to rotary joint's the rotation moment of torsion that can significantly reduce. The specific pressure of the sealing end face is reduced by reducing the elastic force of the small springs, so that the rotating torque rotating joint of the rotating joint is reduced by adopting a split structure, the installation and the maintenance of the rotating joint are facilitated, the online maintenance of the rotating joint can be realized, and the maintenance cost is effectively reduced.

It should be noted that the above mentioned embodiments and embodiments are intended to demonstrate the practical application of the technical solution provided by the present invention, and should not be interpreted as limiting the scope of the present invention. Various modifications, equivalent substitutions and improvements will occur to those skilled in the art and are intended to be within the spirit and scope of the present invention. The protection scope of the present invention is subject to the appended claims.

Claims (5)

1. A rotary joint suitable for steaming, high rotating speed and low torque is characterized by comprising a rear end cover (1), a disc-shaped ring (5), a hollow shaft (13) and a shell (11), wherein,

the hollow shaft (13) is arranged in the shell (11) through two bearings (9), the two bearings (9) are separated by a bearing spacer sleeve (10), the inner sides of the two bearings (9) are clamped and fixed by an elastic retainer ring (7) for the shaft, and the outer sides of the two bearings (9) are clamped and fixed by an elastic retainer ring (12) through holes; an end face sealing ring (6) is mounted on the end face of the inner side of the hollow shaft (13), the end face sealing ring (6) is tightly attached to and matched with the disc-shaped ring (5) to form sealing pairing, a step groove (15) is formed in the end face, tightly attached to the disc-shaped ring (5) and the end face sealing ring (6), of the disc-shaped ring (5) to reduce the contact area of the sealing end face, the disc-shaped ring (5) is arranged in a counter bore of the rear end cover (1), the small spring (4) is mounted in the rear end cover (1) above the disc-shaped ring (5), and the small spring (4) presses the disc-shaped ring (5) to achieve a rotary sealing effect; the rear end cover (1) is connected with the shell (11) through an inner hexagonal screw (3).

2. The rotary joint suitable for steaming, rotating at high speed and with low torque as claimed in claim 1, wherein the outer circumferential surface of the disc-shaped ring (5) is sleeved with a steam-type O-ring (2), and the steam-type O-ring (2) is tightly fitted on the inner wall of the rear end cover (1) to form an auxiliary seal.

3. A rotary joint adapted for steaming at high rotational speed and low torque according to claim 2, wherein the steam-like O-ring (2) is a FEPM fluororubber O-ring.

4. A rotary joint adapted for steaming, high speed rotation and low torque as claimed in claim 1, wherein the disc-shaped ring (5) is fixed to the rear end cap (1) by means of an elastic cylindrical pin (14) to prevent the disc-shaped ring (5) from rotating.

5. A swivel joint adapted for steaming high rotational speed and low torque according to claim 1, wherein a through type pressure grease cup (8) is installed in the housing (11) at a position corresponding to between the two bearings (9) for filling the bearings (9) with grease.

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