CN2649204Y

CN2649204Y - Two-tube rotary joint for cooling rolls

Info

Publication number: CN2649204Y
Application number: CN 03255593
Authority: CN
Inventors: 徐爱波; 郑忠根; 於金安
Original assignee: HENGYONG INDUSTRIAL Co Ltd SHANGHAI
Current assignee: HENGYONG INDUSTRIAL Co Ltd SHANGHAI
Priority date: 2003-07-10
Filing date: 2003-07-10
Publication date: 2004-10-20
Anticipated expiration: 2013-07-10

Abstract

A double-tube type rotating joint for cooling roller is characterized in that: sealing parts(8) have a mechanical sealing device(8') which consists of a moving ring(8a'), a static ring(8b'), a static ring seat(8c') and a compression spring(8d'); the moving ring (8a') is inlayed at the end of a rotating shaft; the static ring(8b'), the static ring seat(8c') and the compression spring(8d') are successively arranged between the moving ring(8a') and the left end of a casing(2). Compared with the present technology, the plan has the following outstanding advantages: 1) compared the sealing method having mechanical sealing device with the simple static sealing structure of O type sealing ring, the sealing is more reliable, the leaking quantity is small and the service life is long. 2) that adopting rolling shaft to replace graphite sliding bearing can improve rotating speed and can be matched and used with rollers of different rotating speed requirements, which enlarges the using range.

Description

A kind ofly cool off the double hose swivel joint that roll is used

Technical field

The utility model relates to a kind of mechanically-sealing apparatus, particularly a kind ofly cools off the double hose swivel joint that roll is used.

Background technology

The roll of steel rolling equipment gyrates in rolling process, and works under hot conditions, must the water flowing of breaker roll inner chamber cool, so each roll all will dispose the swivel joint that a cooling roll is used for this reason.Fig. 1 is a kind of existing double hose swivel joint, this swivel joint is by housing 1, housing 2, rotating shaft 3, ring flange 4, screw 5, water service pipe 6, bearing 7, seal member 8 constitutes, be screwed connection between housing 1 and the housing 2, have water inlet 2a and delivery port 1a on housing 2 and the housing 1, water service pipe 6 its left ends that communicate with the roll inner chamber are fixed on the housing 1, graphite sliding bearing 7 is arranged between housing 2 and the rotating shaft 3, housing 1 and housing 2 maintain static, rotating shaft 3 is by subdivision ring 9, ring flange 4, screw 5 is connected as a single entity with roll, the water inlet of water inlet 2a enters the inner chamber of roll through water service pipe 6 outsides, the cooling roll after again through water service pipe 6 to delivery port 1a water outlet, leak in order to prevent cooling fluid, a plurality of seals 8 are set, and these seals adopt the O RunddichtringO.The defective one of above-mentioned swivel joint is that sealing effectiveness is relatively poor, the 2nd, and adopt sliding bearing can not adapt to high speed rotary motion, limited the scope of application of swivel joint.

Summary of the invention

The purpose of this utility model provides a kind of double hose swivel joint that roll is used that cools off, and uses the problem that this single hose swivel joint can overcome the poor sealing performance of prior art effectively, and can with the at a high speed supporting use of roll of rotation

A kind ofly cool off the double hose swivel joint that roll is used, comprise housing 1, housing 2, rotating shaft 3, ring flange 4, screw 5, water service pipe 6, bearing 7, seal member 8 is characterized in that: seal member 8 contain a main sealing device 8 ', sealing device 8 ' form by rotating ring 8a ', stationary ring 8b ', stationary seat 8c ', compression spring 8d ', wherein rotating ring 8a ' is embedded on the left part of rotating shaft 3, and stationary ring 8b ', stationary seat 8c ', compression spring 8d ' are arranged between the left part of rotating ring 8a ' and housing 2 inner chambers successively; Rotating ring 8a ' employing aluminium oxide ceramics ring, the carbon graphite ring that stationary ring 8b ' employing was soaked in phenolic aldehyde, bearing 7 adopts rolling bearing.This double hose swivel joint is formed sealing surface by rotating ring 8a ' and stationary ring 8b ', compression spring 8d ' is used to compensate the gap between rotating ring and the stationary ring, guarantee closely contact all the time between the dynamic and static ring, to improve the reliability and the service life of sealing, replace graphite sliding bearing with rolling bearing, can adapt to the various speed demand of roll.Cooling water glide path in double hose swivel joint and roll is same as the prior art.

With prior art relatively, the utlity model has following outstanding advantage: 1) adopt the sealing means that contains main sealing device to compare than the static seal structure of the simple O of employing RunddichtringO, sealing is reliable more, little, the long service life of leakage rate; 2) adopt rolling bearing to replace graphite sliding bearing, can improve rotating speed, the use that can match with the roll that different rotating speeds requires is so enlarged the scope of application.

Description of drawings

The structural representation of the double hose swivel joint that Fig. 1 uses for existing cooling roll.

The structural representation of the double hose swivel joint that Fig. 2 uses for the design's cooling roll.

The specific embodiment

A kind ofly cool off the double hose swivel joint that roll is used, its structure as shown in Figure 2, mechanically-sealing apparatus 8 ' rotating ring 8a ' employing through Φ 57 * Φ 45 * 7mm aluminium oxide ceramics ring of end face polishing, be embedded on the left part of rotating shaft 3, phenolic aldehyde carbon graphite ring is soaked in stationary ring 8b ' employing, be of a size of Φ 60 * Φ 45 * 5mm, stationary seat 8c ' employing bronze is made, the material of compression spring 8d ' is 3Cr13, its external diameter, internal diameter, line directly is respectively 62mm, 56mm, 3mm, remaining seal member adopts fluorubber 0 RunddichtringO, stationary ring 8b ', stationary seat 8c ', compression spring 8d ' is arranged between the left part of rotating ring 8a ' and housing 2 inner chambers successively, ring flange 4 diameters are 140mm, fixedly connected with roll by 4 M12 * 40mm stainless steel screw 5, make rotating shaft and roll do rotation synchronously.

Claims

1. one kind is cooled off the double hose swivel joint that roll is used, comprise housing (1), housing (2), rotating shaft (3), ring flange (4), screw (5), water service pipe (6), bearing (7), seal member (8) is characterized in that: seal member (8) contains a main sealing device (8 '), and sealing device (8 ') is by rotating ring (8a '), stationary ring (8b '), stationary seat (8c '), compression spring (8d ') is formed, wherein rotating ring (8a ') is embedded on the left part of rotating shaft (3), stationary ring (8b '), stationary seat (8c '), compression spring (8d ') is arranged between the left part of rotating ring (8a ') and housing (2) inner chamber successively.

2. swivel joint according to claim 1 is characterized in that: rotating ring (8a ') adopts the aluminium oxide ceramics ring, and stationary ring (8b ') adopts the carbon graphite ring that soaked in phenolic aldehyde.

3. swivel joint according to claim 1 is characterized in that: bearing (7) adopts rolling bearing.