CN201165959Y - Reciprocating compressor packing assembly with cooling oil circuit - Google Patents

Abstract

A packing assembly for a reciprocating compressor with a cooling oil circuit, relating to an accessory of a reciprocating compressor, including a back cover, N groups of sealing packings, and a front flange connected in sequence, and each group of sealing packings is composed of a sealing sleeve and a packing A group of sealing packing near the back cover is connected with an air return ring, the back cover is provided with an oil inlet and an oil return port in the radial direction, and an oil inlet and an oil return circuit are opened in the axial direction, the air return ring, The sealing sleeve of each group of sealing packing is provided with an oil inlet and an oil return. Oil passage, lubricating hole; also includes at least one cooling ring, which is opened with an oil inlet passage, an oil return passage and an annular oil chamber. The packing assembly of the reciprocating compressor achieves the purpose of remarkable cooling effect through the joint action of the lubricating ring, the cooling ring, the oil inlet circuit and the oil return circuit, and the structure of the packing assembly is reasonable, and at the same time, it avoids the problems caused by water cooling. negative effects.

Description

Reciprocating compressor packing assembly with cooling oil circuit

Technical field:

The utility model relates to an accessory of a reciprocating compressor, in particular to a packing assembly of a reciprocating compressor with a cooling oil circuit.

Background technique:

Generally, a packing assembly is provided at the joint between the cylinder and the piston rod of the reciprocating compressor, and the packing in the packing assembly can prevent the gas in the cylinder from leaking out from the gap between the piston rod and the cylinder. However, due to the high temperature of the gas in the cylinder and the frictional heat generated by the high-speed friction between the piston rod and the packing in the packing assembly, these packings are easily damaged under high temperature conditions. In order to improve the working conditions of the packing and the piston rod, To improve the service life of the packing, cooling measures are generally taken for the packing components. The cooling method of the traditional reciprocating compressor packing adopts circulating water cooling, that is, circulating water is passed through the outer surface of the packing assembly for cooling, but the circulating water evaporates and absorbs heat in a large amount in the cooling tower with an open structure to realize self-cooling At the same time, due to a large amount of evaporation and aeration, the circulating water system deteriorates in the direction of fouling and corrosion of equipment, which leads to various equipment accidents; especially for natural gas compressors that need to work in areas including high cold and water shortages It is not an easy task to achieve circulating water cooling. Chinese patent application: 200410094450.0 "piston compressor piston rod oil cooling structure" proposes a piston compressor that uses oil instead of water for cooling, but because its cooling structure is provided with cooling holes on the piston rod body, this structure It is difficult to meet the two conditions of not only ensuring its own strength, but also ensuring a thin wall to achieve the cooling effect, and it is very difficult to drill a slender cooling hole on the piston rod.

Utility model content:

The technical problem to be solved by the utility model is to provide a packing assembly of a reciprocating compressor with a cooling oil circuit with remarkable cooling effect and a reasonable structure, so as to solve the above-mentioned problems existing in the packing assembly of the existing reciprocating compressor.

The technical solution to solve the above technical problems is: a reciprocating compressor packing assembly with a cooling oil circuit, including the rear cover, N groups of sealing packings, and front flanges connected in sequence, and each group of the N groups of sealing packings The sealing packing is composed of a sealing sleeve and the packing inside the sealing sleeve. The sealing packing close to the back cover is connected with an air return ring. The back cover has an oil inlet and an oil return port respectively in the radial direction, and There are oil inlet passages and oil return passages communicating with the oil inlet and oil return port respectively. The air return ring and the sealing sleeve of each set of sealing packing are also respectively provided with oil inlet passages and oil return passages to the rear cover along the axial direction. The oil inlet and oil return passages corresponding to the oil return passage; the packing assembly also includes at least one lubricating ring, which is installed between any two groups of sealing packings, and has oil inlet passages along the axial direction , Oil return passage, and a lubrication hole through the oil return passage and the inner hole is opened in the direction perpendicular to the oil return passage. The value range of the above N is: 2≤N≤25.

The further technical solution of the utility model is: the packing assembly also includes at least one cooling ring, which is installed on the front side of any group of sealing packings, and it is respectively provided with an oil inlet passage and an oil return passage along the axial direction. , and an annular oil chamber is opened on one side, and the annular oil chamber communicates with the oil inlet passage and the oil return passage respectively through two oblique holes.

Another technical solution of the utility model is: the sealing sleeve is either a split type sealing sleeve composed of an annular sealing sleeve and a spacer located on one side of the annular sealing sleeve; It is an integral sealing sleeve formed by connecting with the spacer ring on one side of the circular sealing sleeve.

Due to the adoption of the above structure, the reciprocating compressor packing assembly with cooling oil passage of the utility model has the following beneficial effects compared with the existing reciprocating compressor packing assembly:

1. The cooling effect is very good:

Since the reciprocating compressor packing assembly with cooling oil passage of the utility model includes at least one lubricating ring, the lubricating ring has a lubricating hole passing through the oil return passage and the inner hole, so the cooling oil on the oil return passage can pass through this The lubricating hole on the lubricating ring enters the inner hole to directly cool and lubricate the friction surface of the piston rod; in addition, a cooling ring is installed on the front side of any set of sealing packings, and the cooling ring is provided with inlet and return oil passages. A part of the cooling oil flows into the annular oil chamber of the cooling ring from the oil inlet passage for circulating cooling; therefore, the cooling effect of the packing assembly of the reciprocating compressor with the cooling oil passage of the utility model is very good.

2. Reasonable structure:

Because the reciprocating compressor packing assembly with cooling oil circuit of the utility model includes the back cover, sealing packing, and front flange connected in sequence, a return air ring is installed on the side of the back cover, and on the back cover, sealing packing There are oil inlet and oil return circuits, and the cooling ring and lubricating ring are used for cooling. Therefore, the packing assembly of the reciprocating compressor avoids opening cooling oil holes on the piston rod body, thereby ensuring the strength of the piston rod, and its The structure is also very compact and reasonable.

3. Avoid the negative effects brought by water cooling:

Because the reciprocating compressor packing assembly with cooling oil circuit of the utility model replaces the traditional water cooling with oil cooling, the packing assembly using oil cooling will not affect the cooling effect due to corrosion and fouling, and even lead to Accidents and other phenomena; at the same time, the oil used as circulating cooling can be used many times, which provides a guarantee for the reciprocating compressor to operate in all-weather regions.

Below, the technical features of the reciprocating compressor packing assembly with cooling oil passage of the present invention will be further described in conjunction with the accompanying drawings and embodiments.

Description of drawings:

Figure 1: A schematic structural view of the reciprocating compressor packing assembly with a cooling oil circuit of the present invention described in Embodiment 1;

Figure 2-1: Schematic diagram of the sealing packing when the sealing sleeve is a split structure;

Figure 2-2: Schematic diagram of the sealing packing when the sealing sleeve is an integral structure;

Figure 3: Schematic diagram of the structure of the lubricating ring;

Figure 4: Schematic diagram of the structure of the cooling ring;

Figure 5: Schematic diagram of the structure of the return air ring and lubricating ring described in Embodiment 1 when used as a spacer;

Figure 6: Structural schematic diagram of the reciprocating compressor packing assembly with cooling oil passage of the utility model described in Embodiment 2;

In the picture:

1-Back cover, 11-Oil inlet, 12-Oil return port;

2 - sealing packing, 2 ₁ - first group of sealing packing, 2 ₂ - second group of sealing packing,

2 ₃ - the third group of sealing packing, 2 ₄ - the fourth group of sealing packing, 2 ₅ - the fifth group of sealing packing,

21 ₁ - split gland, 21 ₂ - integral gland,

211-circular sealing sleeve, 212-spacer, 22-packing,

3-return air ring, 4-lubrication ring, 41-lubrication hole,

42-inner hole, 5-cooling ring, 51-ring oil chamber,

52-oblique hole, 6-front flange.

Detailed ways:

Embodiment one:

A reciprocating compressor packing assembly with a cooling oil circuit, including a back cover 1, N=5 sets of sealing packings 2, and a front flange 6 connected in sequence, the five sets of sealing packings 2 are formed by the first group of sealing packings 2 _1. The second group of sealing packings 2 ₂ ... the fifth group of sealing packings 2 ₅ , each group of sealing packings consists of a sealing sleeve and packing 22 inside the sealing sleeve, wherein the sealing sleeve is composed of an annular sealing sleeve 211 and The split seal sleeve 21 ₁ composed of the spacer ring 212 located on one side of the annular seal sleeve 211 is connected with a return air ring 3 near the sealing packing of the rear cover 1, and the rear cover 1 is respectively opened with inlets along the radial direction. The oil port 11 and the oil return port 12 are respectively opened with the oil inlet passage and the oil return passage communicated with the oil inlet 11 and the oil return port 12 along the axial direction. There are oil inlet and oil return passages corresponding to the oil inlet and oil return passages of the rear cover 1 respectively; the packing assembly also includes M=1 lubricating ring 4, which is installed on the Between the second group of sealing packing ₂₂ and the third group of sealing packing ₂₃ , it has an oil inlet passage and an oil return passage along the axial direction, and a through oil return passage and an inner oil return passage in the direction perpendicular to the oil return passage. Lubrication hole 41 of hole 42 (see FIG. 1 ).

As a modification of the first embodiment, the ring-shaped sealing sleeve and spacer forming the split sealing sleeve 21 ₁ may also be integrated to form an integral sealing sleeve 21 ₂ (see FIG. 2-2 ).

As another transformation of the first embodiment, the air return ring 3 and the lubricating ring 4 can be directly installed on one side of the ring-shaped sealing sleeve ₂₁₁ as a spacer of the split sealing sleeve 211 (see FIG. 5 ).

As another modification of the first embodiment, the lubricating ring 4 may also be installed between any two groups of sealing packings.

As another modification of the first embodiment, the number of groups N of the sealing packing generally depends on the pressure of the gas, which can be more or less, and its value range is: 2≤N≤25 .

As another transformation of the first embodiment, the value of the number M of the lubricating rings is generally determined according to the number of groups of sealing packings, which can be more, but generally does not exceed the number N of groups of sealing packings, that is: M< N.

Embodiment two:

A reciprocating compressor packing assembly with a cooling oil circuit, its basic structure is the same as that of Embodiment 1, the difference is that: the packing assembly also includes K=3 cooling rings 5, and the three cooling rings 5 They are respectively installed on the front side of the first group of sealing packing 2 ₁ , the third group of sealing packing 2 ₃ , and the fifth group of sealing packing 2 ₅ . And an annular oil chamber 51 is opened on one side, and the annular oil chamber 51 communicates with the oil inlet passage and the oil return passage respectively through two oblique holes 52 (see FIG. 6 ).

As a modification of the second embodiment, the cooling ring may also be installed on the front side of any set of sealing packings.

As another modification of the second embodiment, the value of the number K of the cooling rings is generally determined according to the number of groups of sealing packings, but generally does not exceed the number N of groups of sealing packings, that is: K≤N.

Claims (5)

1. One kind with the cooling oil circuit the reciprocal compressor filler assembly, comprise the bonnet (1) that connects successively, N organizes stuffing box packing (2), forward flange (6), every group of stuffing box packing of described N group stuffing box packing (2) lining formed by stuffing box gland and the filler (22) that is positioned in the stuffing box gland, stuffing box packing near bonnet (1) is connected with a return-air circle (3), it is characterized in that: described bonnet (1) radially has filler opening (11) and return opening (12), have the in-line and the oil circuit that communicate with filler opening (11) and return opening (12) vertically, described return-air circle (3), the stuffing box gland of every group of stuffing box packing also has the in-line with bonnet (1) vertically, corresponding in-line of oil circuit and oil circuit; Described filler assembly also includes at least one lubricated circle (4), should be installed between any two groups of stuffing box packing by lubricated circle (4), it has in-line, oil circuit vertically, and on the direction vertical, having the lubrication hole (41) that connects oil circuit and endoporus (42) with oil circuit, above-mentioned N span is: 2≤N≤25.
2. 2. the reciprocal compressor filler assembly of band cooling oil circuit according to claim 1, it is characterized in that: described filler assembly also includes at least one cooling ring (5), this cooling ring (5) is installed in the front side of any one group of stuffing box packing, it has in-line, oil circuit vertically, and having annular oil cavity (51) in a side, this annular oil cavity (51) connects with in-line, oil circuit respectively by two inclined holes (52).
3. 3. the reciprocal compressor filler assembly of band according to claim 1 and 2 cooling oil circuit is characterized in that: described stuffing box gland or for by annular seal cover (211) be positioned at the split type stuffing box gland (21 that the spacer ring (212) of annular seal cover (211) one sides is formed ₁); Or be to overlap and be positioned at annular seal by annular seal to overlap the integral seal cover (21 that the spacer ring of a side fuses and constitutes ₂).
4. 4. the reciprocal compressor filler assembly of band cooling oil circuit according to claim 3, it is characterized in that: described return-air circle (3) can be used as split type stuffing box gland (21 ₁) spacer ring be directly installed on a side of annular seal cover (211).
5. 5. the reciprocal compressor filler assembly of band cooling oil circuit according to claim 3, it is characterized in that: described lubricated circle (4) can be used as split type stuffing box gland (21 ₁) spacer ring be directly installed on a side of annular seal cover (211).

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