CN2236047Y

CN2236047Y - Mechanical sealing structure with sealing slot

Info

Publication number: CN2236047Y
Application number: CN 95232186
Authority: CN
Inventors: 徐万孚
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-09-12
Filing date: 1995-09-12
Publication date: 1996-09-25
Anticipated expiration: 2005-09-12

Abstract

The utility model relates to a mechanical sealing structure with a sealing slot, which comprises a ring body, wherein the end surface of the ring body is provided with a ring sealing dam, the side part of the dam is connected with ridge stations, and a sealing slot is arranged between the ridge stations. The utility model is characterized in that a circumferential edge of the end surface is provided with a ring countercurrent channel which is communicated with the sealing slot. The countercurrent channel is used to gather the downstream leakage of the sealing fluid on the ridge stations to lead the countercurrent flowing in the sealing slot. Consequently, the radical zero leakage or negative leakage of the sealed high pressure fluid on the quality is obtained, and namely, the complete counter-flow pumping effect is obtained to enhance the sealing performance.

Description

A kind of mechanical seal structure that has sealed groove

A kind of mechanical seal structure that has sealed groove belongs to mechanical end face seal, is applied in the sealing of fluid machinery.

In the sealing of fluid machinery, often adopt soft packing seal and mechanical seal, sixties end, the spiral grooves sealing has abroad appearred, uses till today always.Its structure is made up of two-part, and the one, spiral grooves, it is by the even interval of spiral ridge platform; The 2nd, the ring packing dam.This structure always exists sealed high-pressure liquid by the following current on the spiral ridge platform, leak in the obstruction, washing fluid of low voltage side (or atmosphere end), at this moment, the so-called zero or negative essence of leaking is low-pressure fluid or the atmosphere that blocks, cleans, drawn the leakage flow that on high-tension side flow is equal to or greater than the sealed high-pressure liquid on the spiral ridge platform by the backwash effect in the spiral grooves by pump, thereby mass exchange between sealed fluid and obstruction, washing fluid or the atmosphere takes place, make sealability not good.

The purpose of this utility model provides a kind of grooved seal that makes and not only reaches on the flow, and realizes qualitative zero leakage, or the novel mechanical sealing configuration of counterflow pump effect.

The purpose of this utility model is achieved in that and is having the mechanical seal structure of sealed groove, comprise that ring body, ring body end face are provided with the ring packing dam, sidepiece on the dam connects the ridge platform, the ridge interstation is a sealed groove, it is characterized in that being provided with the annular reflux trench that communicates with sealed groove at a circumferential edges of end face.According to sealing operating mode difference, sealed groove can be by man type, spirality, staggeredly cut apart shape, the folded sieve shape groove of triangle replaces.Difform sealed groove all communicates with annular reflux trench.The main effect of reflux trench is: assemble fluid-encapsulated following current leakage flow on the ridge platform, and they are caused reverse flow in the sealed groove, reach sealed high-pressure liquid qualitative radially zero leakage or negative the leakage, promptly the counterflow pump effect of intact meeting improves sealability.

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

Fig. 1 is the plan view of embodiment's 1 structural representation of the present utility model.

Fig. 2 is the left view of embodiment's 1 structural representation of the present utility model.

Fig. 3 is embodiment's 2 structural representations of the present utility model.

Fig. 4-the 7th, embodiment's 3 structural representations of the present utility model.

Fig. 8-the 9th, embodiment's 4 structural representations of the present utility model.

Figure 10-the 13rd, embodiment's 5 structural representations of the present utility model.

See Fig. 1 and Fig. 2, embodiment 1 structure: spirality sealed groove 2 is connected with annular reflux trench 4, and reflux trench 4 is arranged on ring body end face outer rim, dam of ring packing shown in the figure 1 and ridge platform 3.

See Fig. 3, embodiment 2 structure: reflux trench 4 is arranged on the inner edge of ring body end face, and other structure is with embodiment 1.

See Fig. 4-7, embodiment 3 structure: chev(e)ron seal groove 2 is connected with annular reflux trench 4.

See Fig. 8-9, embodiment 4 structure: staggered cut apart sealed groove 2 and be connected with annular reflux trench 4.

See Figure 10-13, embodiment 5 structure: the folded sieve shape sealed groove 2 of triangle is connected with annular reflux trench 4.

Various in sum embodiments, its seal process is: the various sealed grooves that have reflux trench, when they are worked, sealed groove 2 pumps draw fluid-encapsulated, and reflux trench 4 balances in the sealed groove 2 that sealed groove extends end and the sealed fluid reverse flow on the ridge platform 3 and forward mobile, can be as forward flowing on the ridge platform 3 by these annular reflux trench 4 guiding, and change reverse flow in the sealed groove 2 over to, so that the leakage of sealed fluid does not take place, sealing dam 1 only plays seal action in start and stop and static process.

Claims

1, a kind of mechanical seal structure that has sealed groove, it draws together ring body, the ring body end face is provided with the ring packing dam, sidepiece on the dam connects the ridge platform, and the ridge interstation is a sealed groove, it is characterized in that being provided with the annular reflux trench that communicates with sealed groove at a circumferential edges of end face.