CN215172225U - Carbocycle seal structure - Google Patents

Abstract

The utility model discloses a carbocycle seal structure, including sealed main part, be provided with the pivot hole in the sealed main part, be provided with a plurality of seal grooves on the pivot hole, be provided with the carbon sealing ring in the seal groove, be provided with the oil blanket groove on the pivot hole, the both sides in oil blanket groove all have a seal groove at least, be provided with the mounting hole in intercommunication oil blanket groove in the sealed main part, threaded connection has the injection mechanism that can pour into sealed oil on the mounting hole, and the oil blanket inslot can store a certain amount of sealed oil, only need regularly to oil blanket groove come in and go out sealed oil can, injection mechanism installs in sealed main part simultaneously, also need not additionally to increase equipment again to reduce sealed cost.

Description

Carbocycle seal structure

Technical Field

The utility model belongs to the technical field of it is sealed, more specifically the utility model relates to a carbocycle seal structure that says so.

Background

The carbon ring seal belongs to one of floating seals, and is named because the material of the seal ring is carbon graphite. The sealing principle is that the sealing ring is contacted with the rotating shaft, so that leakage is prevented. An annular groove is arranged in a cavity of the sealing main body, an annular graphite sealing ring is arranged in the annular groove, and a gap of 0.01-0.04 mm is formed between the inner diameter of the graphite sealing ring and the rotating shaft (or the shaft sleeve). The carbon ring seal has the advantages of simple structure, convenient maintenance and wide application range, simultaneously realizes zero leakage of toxic gas media by injecting isolating gas (such as nitrogen) into the gap, has the advantages of low cost and low maintenance cost compared with other seal products, and is widely applied to units such as steam turbines, fans, generators, compressors, turbines and the like in the field of petrochemical industry.

In the prior art, the pressure of the isolation gas needs to be higher than that of the leakage-proof gas, and meanwhile, the high-pressure isolation gas needs to be continuously flushed into the sealing ring when the device runs, and the isolation gas needs to be additionally injected by connecting compression equipment during injection, so that the sealing cost is increased.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art, the utility model provides a carbocycle seal structure replaces isolation gas to come the clearance packing between carbon sealing ring and the pivot through sealed oil, reaches sealed effect, and is sealed with low costs.

In order to achieve the above purpose, the utility model provides a following technical scheme: the utility model provides a carbocycle seal structure, includes sealed main part, is provided with the pivot hole in the sealed main part, is provided with a plurality of seal grooves on the pivot hole, is provided with the carbon sealing ring in the seal groove, be provided with the oil blanket groove on the pivot hole, the both sides in oil blanket groove all have a seal groove at least, be provided with the mounting hole in intercommunication oil blanket groove in the sealed main part, threaded connection has the injection mechanism that can pour into sealed oil on the mounting hole.

Further, the injection mechanism comprises an injection cylinder, an injection cavity is arranged in the injection cylinder and communicated with the oil seal groove, an injection screw rod is connected to the shell in a threaded manner, one end of the injection screw rod extends into the injection cavity, an injection piston is arranged at one end of the extension screw rod, and the injection piston is in contact with the wall of the injection cavity.

Furthermore, a supplementary hole is formed in the injection cylinder, and a supplementary bolt is connected to the supplementary hole in a threaded mode.

Further, the carbon sealing ring comprises a first sealing ring and a second sealing ring, the second sealing ring is located on the outer circular surface of the first sealing ring, the thickness of the second sealing ring is smaller than that of the first sealing ring, a supporting step is arranged on the sealing groove, and the first sealing ring is inconsistent with the supporting step.

Furthermore, be provided with the constant head tank in the sealed main part, set up in the spacer in the constant head tank, be provided with the draw-in groove of the first sealing ring of mountable and second sealing ring on the spacer.

Furthermore, the locating plate is in an inverted trapezoid shape, and the clamping groove is located on a longer bottom edge of the locating plate.

Further, sealed main part includes two semicircle sealing bodies, the carbon sealing ring includes two semicircle sealing rings, two connect through bolt and nut between the semicircle sealing body, connect through annular extension spring between two semicircle sealing rings.

Compared with the prior art, the beneficial effects of the utility model are that: the sealed oil that will pour into the intracavity through the injection mechanism pours into the oil blanket groove into, can flow to the carbon sealing ring of both sides when sealed oil gets into the oil blanket groove, thereby fill up the clearance between carbon sealing ring and the pivot, thereby reach the sealed to toxic gas, because can store a certain amount of sealed oil in the oil blanket groove, only need regularly to come in and go out sealed oil to the oil blanket groove can, the injection mechanism installs in sealed main part simultaneously, also need not additionally to increase equipment again, thereby reduce sealed cost.

Drawings

Fig. 1 is a side sectional view of the carbocyclic ring seal structure of the present invention;

FIG. 2 is an enlarged view of portion A of FIG. 1;

FIG. 3 is an enlarged view of portion B of FIG. 1;

FIG. 4 is an enlarged view of portion C of FIG. 1;

FIG. 5 is a schematic view of the positioning plate;

fig. 6 is a front structural view of the sealing body.

Reference numerals: 1. a sealing body; 2. a sealing groove; 201. supporting a step; 3. a carbon seal ring; 301. a first seal ring; 302. a second seal ring; 4. an oil seal groove; 5. mounting holes; 6. an injection mechanism; 601. an injection cylinder; 602. an injection chamber; 603. injecting a screw; 604. an injection piston; 605. a refill hole; 606. supplementing bolts; 7. positioning a groove; 8. positioning plates; 9. a card slot; 10. a semicircular sealing body.

Detailed Description

In the description of the present invention, it should be noted that, for the orientation words, such as the terms "center", "lateral (X)", "longitudinal (Y)", "vertical (Z)", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., the orientation and the positional relationship are indicated based on the orientation or the positional relationship shown in the drawings, and the description is only for convenience of describing the present invention and simplifying the description, but not for indicating or implying that the device or the element referred to must have a specific orientation, be constructed and operated in a specific orientation, and should not be construed as limiting the specific protection scope of the present invention.

Furthermore, if the terms "first" and "second" are used for descriptive purposes only, they are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features. Thus, the definition of "a first" or "a second" feature may explicitly or implicitly include one or more of the features, and "a plurality" or "a plurality" in the description of the invention means two or more unless a specific definition is explicitly provided.

The present invention is further explained with reference to fig. 1 to 6.

The utility model provides a carbocycle seal structure, includes sealed main part 1, is provided with the pivot hole on the sealed main part 1, is provided with a plurality of seal grooves 2 on the pivot hole, is provided with carbon sealing ring 3 in the seal groove 2, be provided with oil blanket groove 4 on the pivot hole, the both sides of oil blanket groove 4 all have one seal groove 2 at least, be provided with the mounting hole 5 of intercommunication oil blanket groove 4 on the sealed main part 1, threaded connection has the injection mechanism 6 that can pour into sealed oil on the mounting hole 5, injection mechanism 6 is used for pouring into sealed oil into oil blanket groove 4.

As shown in fig. 1 and 2, with injection mechanism 6 through 5 threaded connection of mounting hole on sealed main part 1, then to sealed oil injection oil seal 4 in the oil seal groove, can flow to the carbon sealing ring 3 of both sides when sealed oil gets into oil seal groove 4, thereby fill up the clearance between carbon sealing ring 3 and the pivot, thereby reach the sealed to toxic gas, because oil seal groove 4 can internal storage a certain amount of sealed oil, only need regularly to come in and go out sealed oil to oil seal groove 4 can, injection mechanism 6 installs on sealed main part 1 simultaneously, also need not additionally to increase equipment again, thereby reduce sealed cost.

Preferably, the sealing oil is an oil having poor fluidity and high viscosity, and may be glycerin or the like.

As shown in fig. 2, the injection mechanism 6 according to the preferred embodiment includes an injection cylinder 601, an injection cavity 602 is disposed in the injection cylinder 601, sealing oil is disposed in the injection cavity 602, the injection cavity 602 is communicated with the oil seal groove 4, an injection screw 603 is connected to the housing through a thread, one end of the injection screw 603 extends into the injection cavity 602, and an injection piston 604 is disposed at the extended end, the injection piston 604 abuts against the cavity wall of the injection cavity 602, when the sealing oil needs to be injected, the injection screw 603 is rotated to move the injection piston 604 toward the oil seal groove 4 in the injection cavity 602, that is, the sealing oil in the injection cavity 602 can be injected into the oil seal groove 4 through the injection piston 604, the injection screw 603 connected through the thread can control the injection amount of the sealing oil, the injection mechanism 6 has a simple structure, and the early investment cost and the later maintenance cost are low.

Preferably, the injection piston 604 is provided with a rubber seal to prevent leakage of sealing oil from the injection chamber 602.

As shown in fig. 1, a supplementary hole 605 is provided in the injection cylinder 601 according to the preferred embodiment, a supplementary bolt 606 is screwed into the supplementary hole 605, and when all the sealing oil in the injection chamber 602 is injected into the oil seal groove 4, the injection piston 604 is moved to a position above the supplementary hole 605, and then the supplementary bolt 606 is screwed out, so that the sealing oil can be replenished into the injection chamber 602 again through the supplementary hole 605.

As shown in fig. 3, the carbon sealing ring 3 of the preferred embodiment includes a first sealing ring 301 and a second sealing ring 302, the second sealing ring 302 is located on the outer circumferential surface of the first sealing ring 301, and the thickness of the second sealing ring 302 is smaller than that of the first sealing ring 301, that is, a step is formed on the outer circumferential surface of the first sealing ring 301, the sealing groove 2 is provided with a supporting step 201, the first sealing ring 301 abuts against the supporting step 201, when the carbon sealing ring 3 is mounted on the sealing body 1, the second sealing ring 302 and the first sealing ring 301 extend into the sealing groove 2, so that the step on the outer circumferential surface of the first sealing ring 301 abuts against the supporting step 201, the carbon sealing ring 3 can be preliminarily positioned by the first sealing ring 301 and the supporting step 201, and thus when the sealing body 1 is mounted on the shaft sleeve, it is not necessary to manually center-align the carbon sealing ring 3 and the shaft sleeve, the installation efficiency of sealed main part 1 is improved, the labour is reduced, prevents simultaneously that carbon sealing ring 3 can not radial movement when sealed main part 1 carries out the work, keeps the clearance between carbon sealing ring 3 and the pivot unchangeable, prevents that the clearance from expanding to make sealed oil lose sealing effect.

As shown in fig. 4, it is preferable in this embodiment that a positioning groove 7 is provided on the sealing main body 1, a positioning plate 8 is provided in the positioning groove 7, a clamping groove 9 capable of mounting the first sealing ring 301 and the second sealing ring 302 is provided on the positioning plate 8, after an annular tension spring is mounted on the carbon sealing ring 3, the positioning plate 8 can be abutted against the first sealing ring 301 and the second sealing ring 302 through the clamping groove 9, and then the positioning plate 8 is aligned and mounted on the positioning groove 7 of the sealing main body 1, that is, the positioning plate 8 prevents the carbon sealing ring 3 from axially rotating on the sealing groove 2 when sealing, so as to improve the sealing effect of the carbon sealing ring 3.

As shown in fig. 5, this embodiment is preferred the spacer 8 is the down-trapezoid, and two sides of spacer 8 are the slope form promptly, draw-in groove 9 is located a longer bottom of spacer 8, and when the spacer 8 was installed into in the constant head tank 7, the side of spacer 8 was inconsistent with the cell wall of constant head tank 7, along with the spacer 8 stretches into constant head tank 7, two sides of spacer 8 were extruded and drawn close each other to make draw-in groove 9 compress tightly carbon sealing ring 3, can further improve the location effect of spacer 8, further prevent carbon sealing ring 3's rotation.

As shown in fig. 6, the seal main body 1 of the preferred embodiment includes two semicircular sealing bodies 10, the two semicircular sealing bodies 10 are connected by a bolt and a nut, the positioning groove 7 is located on one of the semicircular sealing bodies 10, the two semicircular sealing bodies 10 are separated when the carbon seal ring 3 is installed, then the carbon seal ring 3 with the positioning plate 8 is installed on the semicircular sealing body 10 with the positioning groove 7, and then the two semicircular sealing bodies 10 are folded and connected by the bolt and the nut.

Preferably, carbon seal ring 3 includes two semicircular seal rings, connects through annular extension spring between two semicircular seal rings, installs annular extension spring on one of them semicircular seal ring earlier during installation carbon seal ring 3, then installs this semicircular seal ring on one of them semicircular seal body 10, again with annular extension spring tensile, then install another semicircular seal ring on previous semicircular seal ring, make two semicircular seal rings form a holistic carbon seal ring 3 through the contractile force of annular extension spring promptly.

It is above only the utility model discloses a preferred embodiment, the utility model discloses a scope of protection does not only confine above-mentioned embodiment, the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims (7)

1. The utility model provides a carbocycle seal structure, includes sealed main part, is provided with the pivot hole in the sealed main part, is provided with a plurality of seal grooves on the pivot hole, is provided with carbon sealing ring, its characterized in that in the seal groove: the oil seal structure is characterized in that an oil seal groove is formed in the rotating shaft hole, at least one seal groove is formed in each of two sides of the oil seal groove, a mounting hole communicated with the oil seal groove is formed in the seal body, and an injection mechanism capable of injecting sealing oil is connected to the mounting hole in a threaded mode.

2. The carbocyclic seal structure of claim 1, wherein: the injection mechanism comprises an injection cylinder, an injection cavity is arranged in the injection cylinder and communicated with an oil seal groove, an injection screw rod is connected to the shell in a threaded mode, one end of the injection screw rod extends into the injection cavity, an injection piston is arranged on one end of the extension end of the injection screw rod, and the injection piston is in contact with the wall of the injection cavity.

3. The carbocyclic seal structure of claim 2, wherein: and a supplementary hole is formed in the injection cylinder, and a supplementary bolt is connected to the supplementary hole in a threaded manner.

4. The carbocyclic seal structure of claim 3, wherein: the carbon sealing ring comprises a first sealing ring and a second sealing ring, the second sealing ring is located on the outer circular surface of the first sealing ring, the thickness of the second sealing ring is smaller than that of the first sealing ring, a supporting step is arranged on the sealing groove, and the first sealing ring is inconsistent with the supporting step.

5. The carbocyclic seal structure of claim 4, wherein: the sealing device is characterized in that a positioning groove is formed in the sealing main body, a positioning sheet is arranged in the positioning groove, and a clamping groove capable of being provided with a first sealing ring and a second sealing ring is formed in the positioning sheet.

6. The carbocyclic seal structure of claim 5, wherein: the locating plate is in an inverted trapezoid shape, and the clamping groove is located on one longer bottom edge of the locating plate.

7. The carbocyclic seal structure of any of claims 1 to 6, wherein: the sealing main body comprises two semicircular sealing bodies, the carbon sealing ring comprises two semicircular sealing rings, the two semicircular sealing bodies are connected through bolts and nuts, and the two semicircular sealing rings are connected through an annular tension spring.

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