RU2561960C2 - Packing gland for gas compressors - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: packing gland for gas compressors comprises a sealing chamber set in a separate housing and containing a split sealing ring with its segments being tightened by a ring-spring, and a split lock ring with its segments being tightened by a ring-spring as well. The sealing and lock rings in every sealing chamber are fixed to each other by a pin. Every sealing chamber additionally comprises a thrust ring attached to the casing by lead screws and is pressed against the sealing ring by a point spring.

EFFECT: invention improves the reliability of packing gland performance.

6 cl, 6 dwg

Description

Technical field

The claimed invention relates to a sealing technique and can be used to seal the cylinder of gas compressors.

The prior art.

A rod seal is known (RF patent No. 2124664, F16J 15/56 [1]), consisting of split sealing rings located in the working chamber (sealing chamber), an annular groove made on the outer surface of each of them, and elastic elements placed in the said annular grooves. Each o-ring has a pair of through, parallel to each other cuts, and the cuts of each pair are made tangent to the inner surface of the sealing rings in its diametrically opposite points and in opposite directions.

A seal of a rod or plunger is known (RF patent No. 2016308, F16J 15/26 [2]), comprising a sealing ring made of three parts covered by segments and a locking ring made of three sectors. Each ring is pulled together by a bracelet spring entering a ring groove on the outer cylindrical surface of the ring. In the groove in the places where the parts of the rings are interconnected, cylindrical recesses are made along the entire width of the groove. The interface between the cylindrical surfaces of the groove and the recess is rounded.

The disadvantage of both devices is that not fixed o-rings during operation can turn and coincide with cuts, gas will penetrate into the formed gap, which will lead to a loss of the sealing ability of the device.

The specified sealing device [2] is the set of essential features the closest system of the same purpose to the claimed invention. Therefore, it is adopted as a prototype of the claimed invention.

Disclosure of invention

The technical result provided by the claimed invention is to increase the reliability of the gland.

The essence of the invention lies in the fact that the gas compressor gasket contains at least one sealing chamber located in a separate housing and containing a cut sealing ring, the segments of which are tightened by a spring ring, and a cut closing ring, whose segments are also tightened by a spring ring, the sealing and locking rings in each sealing chamber are fixed to each other by a pin, while each of the sealing chambers additionally includes a thrust ring fixed to the housing with guide screws and tightened to the o-ring by at least one point spring.

The gland may contain a flange in which the sealing chamber will be placed.

The gland may contain a clamping ring, while the clamping ring, flange and housing of the sealing chamber will be connected by studs with union nuts.

The locking and sealing rings are preferably made of graphite-plastic material.

The housings of the sealing chambers and the flange should preferably be made of steel.

A rubber ring of circular cross section may be located in the groove of the flange housing.

Brief Description of the Drawings

The invention is illustrated by the following graphic materials.

The figure 1 shows a diagram of the stuffing box, side view. Figure 2 - diagram of the seal, front view. Figure 3 and figure 4 shows the locking ring, front view and side view, respectively. Figure 5 and figure 6 shows the o-ring, front view and side view, respectively.

The implementation of the invention

The gland contains a flange (1), five sealing chambers (2) and a pressure ring (3). The first sealing chamber (2) is located inside the flange (1). The remaining sealing chambers (2) are located in separate housings. The end of the previous body closes the sealing chamber (2) of the next body. The housings of the sealing chambers (2) are assembled on the flange (1) and fastened with two studs (3) М8х195-200 with union nuts (4) through the clamping ring (5).

Each sealing chamber (2) contains two rings connected to each other by a pin (6) - a closing ring (7) and a sealing ring (8). These rings are pressed by a thrust ring (9), which is mounted on two screws (10) and four point springs (11).

The locking ring (7) consists of a graphite-fluoroplastic ring (12) cut into three segments and tightened by a spring ring (13).

The sealing ring (8) is also graphite-fluoroplastic, cut into segments: inner (14) and outer (15) part, and pulled together by a spring ring (13).

The flange housing (1) and the sealing chamber housings (2) are made of steel.

The seal of the stuffing box in the lantern boring is provided by a rubber ring (16) of circular cross-section. The ring (16) is located in the groove of the gland flange (1). The diameter of the flange (1) is 200 mm.

The gland is mounted in the body of the spacer lamp, installed between the cylinder and the bed. The oil seal is designed to work on a rod with a diameter of 45 mm. Landing diameter 115 mm. An oil seal is attached to the flashlight by two M16 bolts and six M16 studs.

The implementation of the structural elements of the claimed invention is not limited to the above examples.

Work description

The bracelet springs (13) press the rings (7 and 8) to the surface of the stem, in addition to the closing (7) and sealing (8) rings, there is simultaneous mutual pressing and sealing of the ring segments together. The gas pressure and four point springs (11) press the sealing elements against the surface of the stuffing box (2), thereby ensuring sealing in the axial direction. At the same time, the sealing elements that wear out over time are constantly squeezed by springs, providing the necessary seal.

Thus, from the foregoing, it follows that in the claimed invention, the claimed technical result “improving the reliability of the oil seal” is achieved due to the fact that the gas compressor seal contains at least one sealing chamber located in a separate housing and containing a cut sealing ring, the segments of which are tightened a spring ring, and a cut closing ring, the segments of which are also pulled together by a spring ring, while the sealing and closing rings in each sealing chamber e are not fixed between each other by a pin, while each sealing chamber additionally includes a thrust ring fixed to the housing by guide screws and pressed against the sealing ring by at least one point spring.

Industrial applicability

The inventor made a prototype of the claimed invention, tests of which confirmed the achievement of the technical result.

The claimed invention can be implemented using industrially produced devices and materials, can be assembled at any industrial enterprise and will be widely used in sealing technology for sealing a cylinder of gas compressors.

INFORMATION SOURCES

1. The stem seal, RF patent No. 2124664, F16J 15/56, 1999.

2. Seal of a rod or plunger, RF patent No. 2016308, F16J 15/26, 1994.

Claims (6)

1. The gas compressor gasket, containing at least one sealing chamber located in a separate housing and containing a cut sealing ring, the segments of which are tightened by a spring ring, and a cut closing ring, whose segments are also tightened by a spring ring, characterized in that the sealing and the locking rings in each sealing chamber are fixed together by a pin, while each of the sealing chambers additionally includes a thrust ring fixed to the housing by guides screws and the O-ring is compressed to at least one point by a spring. 2. An oil seal according to claim 1, characterized in that it comprises a flange in which an additional sealing chamber is located. 3. The gland according to claim 1, characterized in that it contains a clamping ring, while the clamping ring, flange and the housing of the sealing chamber are connected by studs with union nuts. 4. The gland according to any one of paragraphs.1,2, characterized in that the locking and sealing rings are made of graphite-plastic material. 5. An oil seal according to any one of paragraphs.1,2, characterized in that the housing of the sealing chambers and the flange are made of steel. 6. The stuffing box according to claim 2, characterized in that a rubber ring of circular cross section is located in the groove of the flange housing.

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