CN2229579Y - Built-in forced rapid cooling mechanical seal - Google Patents

Abstract

The utility model relates to a built-in forced rapid cooling mechanical sealing device, and is suitable for the field of the chemical engineering. A moving ring and a driving seat, and a static ring and a pump cover all adopt two sealing rings to seal. A spacing ring is arranged between the two sealing rings. One end of the sealing ring of the static ring is clamped by a clamping plate. The utility model has the advantages of reasonable structural design, reliable sealing performance, long service life, etc.

Description

Built-in type is forced cooling mechanical seal fast

The utility model relates to a kind of mechanical seal, and particularly a kind of built-in type that solves shaft sealing leakage in the pump is forced cooling mechanical seal fast, and it mainly is applicable to chemical field.

Built-in type of the prior art is forced cooling mechanical seal, its structure such as China Patent No. 92220977.4 (applying date 920922) are disclosed, although this structure is reasonably more than the design of the outer dress outflow single end face spring balancing of manying type bellows structure, but in actual use, also have following deficiency: 1, rotating ring all only is provided with seal ring between transmission shaft and between stationary ring and the pump cover, sealing load is even inadequately, and sealability is owed reliably, and leakage problem fails to be solved completely; What 2, adopt between pump cover and the seal ring is seal groove structure, so the manufacturability of its processing is poor, structural design is reasonable inadequately.

The purpose of this utility model is to overcome existing above-mentioned deficiency in the prior art, and provides a kind of structural design more reasonable.The better built-in type of sealability is forced cooling mechanical seal fast.

The purpose that the utility model proposed can be achieved through the following technical solutions: in this mechanical seal structure, be provided with the two seals circle between rotating ring and the retainer, and between the twice seal ring of moving ring, be provided with spacer ring, and also be provided with the two seals circle between stationary ring and the pump cover, and between twice stationary ring seal ring, be provided with spacer ring, and compress with pressing plate at an end of stationary ring seal ring.

Description of drawings is as follows:

Fig. 1 is a structural representation of the present utility model.

Following the utility model will be in conjunction with the accompanying drawings, and be described in further detail by embodiment.

Referring to Fig. 1, this is the many spring standing machanical seals of stream single end face balance type in a kind of interior dress, retainer 1 is fixed on the step of axle 17, between retainer 1 and rotating ring 5, cooperate by stop pin 2, one end of stationary ring 6 and throw-out collar 9 fitted and cooperated with stop pin 10 on being embedded in seal end plate 15, it can not rotated by follow-up ring 5 under the effect of friction torque together, one end of spring 11 then is connected with throw-out collar 9, this spring 11 is fixed in the seal end plate 15, this spring 11 can be joined 6-20 little springs according to the different diameters of axle, this spring structure can use pressure ratio in sealing more even, when moving, stationary ring 5, during 6 end wears, spring force can make stationary ring 6 move axially, and compensates automatically, for preventing the leakage of medium between rotating ring 5 and retainer 1, be provided with twice seal ring of moving ring 3, and be provided with spacer ring 43 of twice seal ring of moving ring, and make sealing load even, performance is more stable, reliably.In like manner, for preventing the leakage of medium between stationary ring 6 and pump cover 18, be provided with twice stationary ring seal ring 7, and be provided with spacer ring 87 of twice stationary ring seal rings, spacer ring 4 and spacer ring 8 are set on retainer 1 and the pump cover 18 by drive fit respectively, adopt straight-through seam between pump cover 18 and the stationary ring seal ring 7, rather than common seal groove, and compress with pressing plate 16, thereby changed the shortcoming of original structure technology capability difference from structure, the setting of two pass stationary ring seal ring and the improvement of seal groove have solved the two places seal leakage link in a whole set of mechanical seal.The fluting O type circle that dynamic and static ring seal ring 3,7 can adopt the polytetrafluoroethylene material to make, scientifically solved the contradiction of seal ring between corrosion resistance and elasticity thus, it can use under-180 ℃ of-250 ℃ of temperature for a long time, at this, also can replace this fluting O type circle with wedge-shaped blocks or V-type circle, just sealing effect is slightly poor.Coolant jacket 12 embeds in the seal end plate 15 by being full of to cooperate, and this coolant jacket 12 is on the same shaft axis with axle 17, and water inlet A and water outlet B are opened on seal end plate 15, so coolant jacket 12 is divided into two cavitys with Seal cage, form a cooling circuit.

13 is the oil sealing plate washer, and 14 is outside framework oil seal.

During work, rotating ring 5 rotates with running shaft 17 with retainer 1 under the drive of stop pin 2, the end face of its end face and stationary ring 6 is fitted and slide relative mutually, formed seal face to prevent dielectric leakage, when moving, stationary ring 5, behind 6 end wears, spring 11 passes to stationary ring 6 by throw-out collar 9 with spring force, make it to move axially, compensate, keep the good fit of sealing surface, meanwhile, cooling water from water inlet A is come in owing to the setting of coolant jacket 12, makes it through the gap between stationary ring 6 and the coolant jacket 12, and then through the gap between coolant jacket 12 and the axle 17, after water outlet B derives, this pump circulation cooling order can both directly be cooled off each seal element, simultaneously, do not contact again with the medium of coming in the C place.

The utility model compared with prior art has the following advantages: 1, structural design more For rationally, dynamic and static ring sealing ring adopts the double sealing circle, and separates with spacer ring, makes it to be subjected to Press evenly, performance is more stable, reliable, and the Reliability Enhancement of sealing uses the longevity more than one times Life is long, and 2, owing to adopt between pump cover and the stationary ring sealing ring and lead directly to seam, and press with pressing plate Tightly, thereby improved processing technology, improved machining accuracy, and effectively solved this The sealing leak problem at place.

Claims (1)

1, a kind of built-in type is forced cooling mechanical seal fast, is embedded with coolant jacket (12) in seal end plate (15), and this coolant jacket (12) is on the same shaft axis with axle (17), and has water intake (A) and water outlet (B) on seal end plate (15); Retainer (1) is fixed on the axle (17), one end of stationary ring (6) and throw-out collar (9) are fitted, one end of spring (11) then is connected with throw-out collar (9), this spring (11) is fixed in the seal end plate (15), it is characterized in that: be provided with twice seal ring of moving ring (3) between rotating ring (5) and the retainer (1), and between twice seal ring of moving ring (3), be provided with spacer ring (4), and also be provided with twice stationary ring seal ring (7) between stationary ring (6) and the pump cover (18), and between twice stationary ring seal ring (7), be provided with spacer ring (8), and compress with pressing plate (16) at an end of stationary ring seal ring (7).