Reciprocating compressor packing cooling system

Abstract

This invention discloses a packing cooling system for a reciprocating compressor. A packing flange (3), a front packing box (4), four packing boxes (5), a rear packing box (6), and a bottom box (7) are sequentially and tightly fitted onto the piston rod 1. The packing flange (3), the front packing box (4), the packing box (5), the rear packing box (6), and the bottom box (7) form a connected spiral stepped cooling circulation channel. The contact surfaces between the packing flange (3), the front packing box (4), the packing box (5), the rear packing box (6), and the bottom box (7) are sealed using an annular outer sealing ring (9) located outside the cooling channel and an annular inner sealing ring (10) located inside the cooling channel, respectively. The front packing box (4), the packing box (5), the rear packing box (6), and the bottom box (7) are filled with packing (8). This invention has high cooling efficiency, long packing service life, and good sealing performance.

Description

Technical Field

[0001] This invention belongs to the field of enhanced heat transfer in fluid machinery, and specifically relates to a packing cooling system for a reciprocating compressor. Background Technology

[0002] During operation, the packing assembly of a reciprocating compressor is affected by the heat transferred from the high-temperature gas and the frictional heat between the piston rod and the packing during high-speed reciprocating motion. This can reduce the sealing performance of the packing and the reliability of the piston rod, leading to problems such as gas leakage and high-temperature packing failure. Consequently, the compression efficiency and service life of the reciprocating compressor are reduced. Therefore, cooling of the packing is necessary to maintain its performance and lifespan. The commonly used cooling method is to install a packing box on the packing seal and introduce a cooling medium to achieve the purpose of cooling. Existing packing cooling systems use a single-channel axial or annular flow structure, which suffers from problems such as small heat exchange area and uneven circumferential temperature of the packing, resulting in low overall cooling efficiency. Summary of the Invention

[0003] The purpose of this invention is to overcome the above-mentioned shortcomings and provide a reciprocating compressor packing cooling system with high cooling efficiency, long packing service life and good sealing performance.

[0004] The objective of this invention and the solution to its main technical problem are achieved by the following technical solution:

[0005] The reciprocating compressor packing cooling system of the present invention includes a piston rod, a packing flange, a front packing box, a packing box, a rear packing box, and a bottom box. The piston rod is sequentially and tightly fitted with a packing flange, a front packing box, four packing boxes, a rear packing box, and a bottom box. The packing flange, front packing box, packing box, rear packing box, and bottom box form a connected spiral stepped cooling circulation channel. The contact surfaces between the packing flange, front packing box, packing box, rear packing box, and bottom box are sealed using an annular outer sealing ring located outside the cooling channel and an annular inner sealing ring located inside the cooling channel. Cooling medium inlets and outlets are located at both ends of the packing flange. The cooling medium inflow and outflow channels of the front packing box, packing box, rear packing box, and bottom box are located between the outer and inner sealing rings. The front packing box, packing box, rear packing box, and bottom box contain packing.

[0006] The reciprocating compressor packing cooling system described above includes a cooling medium inlet and a cooling medium outlet, as well as an inspection hole, at both ends of the packing flange, and multiple bolt holes are evenly arranged circumferentially.

[0007] In the aforementioned reciprocating compressor packing cooling system, the front packing box has a square cross-section cooling medium inflow channel and a cooling medium outflow channel arranged 165° clockwise from both the bottom and top sides on its left side. The front packing box also has twelve axially uniformly and symmetrically arranged circular cross-section channels, six for cooling medium inflow and six for cooling medium outflow, all connected to the left-side channels. On the right side of the front packing box, starting from the axial circular cross-section channels, a semi-circular cross-section channel is evenly arranged 15° counterclockwise to form the cooling medium inflow and outflow channels. A positioning pin is provided at the bottom of the front packing box to facilitate the positioning and connection of the cooling circulation channels.

[0008] The aforementioned reciprocating compressor packing cooling system comprises: a semi-circular cross-section cooling medium inflow channel and a cooling medium outflow channel are provided on both sides of the packing box, starting from the axial circular cross-section flow channel; six circular cross-section cooling medium inflow channels and six six circular cross-section cooling medium outflow channels are evenly arranged axially on the packing box, each connected to the flow channels on both sides; positioning pins for positioning the cooling circulation flow channels are provided at the bottom of each of the four packing boxes; the semi-circular cross-section flow channel on the right side of the front packing box is fitted with the semi-circular cross-section flow channel on the left side of the first packing box, and the semi-circular cross-section flow channel on the right side of the first packing box is fitted with the semi-circular cross-section flow channel on the left side of the second packing box to form a circular cross-section flow channel; the remaining packing boxes are connected in the same way, forming a spiral stepped flow channel as a whole.

[0009] The reciprocating compressor packing cooling system described above includes: the left side of the rear packing box starts with a circular cross-section flow channel and rotates 15° counterclockwise to form six semi-circular cross-section cooling medium inflow channels and six cooling medium outflow channels; and a flow channel positioning pin is provided at the bottom of the rear packing box.

[0010] In the above-mentioned reciprocating compressor packing cooling system, a square cross-section cooling medium mixing channel is provided on the left side of the bottom box in the circumferential direction.

[0011] Compared with the prior art, the present invention has significant advantages. As can be seen from the above technical solution, the cooling medium flow channel formed by the packing flange, front packing box, packing box, rear packing box and bottom box of the present invention is spiral stepped, which increases the heat exchange area of ​​the cooling medium and the turbulence intensity of the cooling medium, thereby improving the overall heat exchange efficiency of the cooling system and achieving the purpose of reducing the temperature of the packing box. The contact surfaces between the packing flange, front packing box, packing box, rear packing box and bottom box are sealed with an annular outer sealing ring located on the outside of the cooling flow channel and an annular inner sealing ring located on the inside of the cooling flow channel, respectively, ensuring the service life and sealing performance of the packing. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of the present invention;

[0013] Figure 2(a) is a left-side view of the packing flange;

[0014] Figure 2(b) is a right-side view of the packing flange;

[0015] Figure 3 Figure 2(a) shows a cross-sectional view along AA;

[0016] Figure 4(a) is a left-side view of the front stuffing box;

[0017] Figure 4(b) is a right-side view of the front packing box;

[0018] Figure 5 Figure 4(a) shows a cross-sectional view along BB;

[0019] Figure 6(a) is a left side view of the stuffing box;

[0020] Figure 6(b) is a right-side view of the stuffing box;

[0021] Figure 7 Figure 6(a) shows a cross-sectional view along CC.

[0022] Figure 8(a) is a left side view of stuffing box two;

[0023] Figure 8(b) is a right-side view of stuffing box two;

[0024] Figure 9 Figure 8(a) shows a cross-sectional view along DD;

[0025] Figure 10(a) is a left side view of the stuffing box;

[0026] Figure 10(b) is a three-sided view of the stuffing box;

[0027] Figure 11 Figure 10(a) shows a cross-sectional view along EE;

[0028] Figure 12(a) is a left side view of the stuffing box;

[0029] Figure 12(b) is a right side view of the stuffing box;

[0030] Figure 13 Figure 12(a) shows a cross-sectional view along FF;

[0031] Figure 14(a) is a left-side view of the rear-mounted stuffing box;

[0032] Figure 14(b) is a right-side view of the rear-mounted stuffing box;

[0033] Figure 15 Figure 14(a) shows a cross-sectional view along GG;

[0034] Figure 16(a) is a left-side view of the packing box bottom;

[0035] Figure 16(b) is a right-side view of the packing box bottom;

[0036] Figure 17 Figure 16(a) shows a cross-sectional view along HH;

[0037] Figure 18 This is a diagram of the spiral stepped cooling circulation flow of a packing cooling system.

[0038] Marked in the image:

[0039] 1. Piston rod; 2. Cooling medium outlet; 3. Packing flange; 4. Front packing box; 5. Packing box; 6. Rear packing box; 7. Bottom box; 8. Packing seal; 9. Outer sealing ring; 10. Inner sealing ring; 11. Locating pin; 12. Cooling medium inlet; 13. Inspection hole; 14. Bolt hole; 15. Cooling medium outflow channel; 16. Cooling medium inflow channel; 17. Cooling medium mixing channel. Detailed Implementation

[0040] The following detailed description, in conjunction with the accompanying drawings and preferred embodiments, details the specific implementation, structure, features, and effects of the reciprocating compressor packing cooling system proposed according to the present invention.

[0041] See also Figure 1 As shown, a reciprocating compressor packing cooling system includes a piston rod 1, a packing flange 3, a front packing box 4, a packing box 5, a rear packing box 6, and a bottom box 7. The piston rod 1 is sequentially and tightly fitted with the packing flange 3, the front packing box 4, four packing boxes 5, the rear packing box 6, and the bottom box 7. The packing flange 3, the front packing box 4, the packing box 5, the rear packing box 6, and the bottom box 7 form a connected spiral stepped cooling circulation channel (see [reference]). Figure 18 The contact surfaces between the packing flange 3, the front packing box 4, the packing box 5, the rear packing box 6, and the bottom box 7 are sealed by an annular outer sealing ring 9 located outside the cooling channel and an annular inner sealing ring 10 located inside the cooling channel, respectively; the cooling medium inlet 12 and cooling medium outlet 2 located at both ends of the packing flange 3, the cooling medium inflow channel 15 and the cooling medium outflow channel 16 of the front packing box 4, the packing box 5, the rear packing box 6 and the bottom box 7 are all between the outer sealing ring 9 and the inner sealing ring 10; the front packing box 4, the packing box 5, the rear packing box 6 and the bottom box 7 are filled with packing 8.

[0042] As shown in Figures 2-3, the packing flange 3 is provided with a cooling medium inlet 12 and a cooling medium outlet 2 and an inspection hole 13 at both ends, and multiple bolt holes 14 are evenly arranged around the circumference.

[0043] Referring to Figures 4-5, the left side of the pre-packing box 4 is provided with square cross-section cooling medium inflow channels 16 and 15, respectively, rotated 165° clockwise from the bottom and top. The pre-packing box 4 has twelve axially uniformly and symmetrically arranged circular cross-section channels, six of which are the cooling medium inflow channels 16 and six of which are the cooling medium outflow channels 15, all connected to the left-side channels. On the right side of the pre-packing box 4, starting from the axial circular cross-section channels, twelve semi-circular cross-section channels are evenly arranged circumferentially at 15° counterclockwise, forming the cooling medium inflow channels 16 and 15. To facilitate the positioning and connection of the cooling circulation channels, a positioning pin 11 is provided at the bottom of the pre-packing box 4.

[0044] Referring to Figure 6-13, the packing box 5 has a semi-circular cross-section cooling medium inflow channel 16 and a cooling medium outflow channel 15 arranged circumferentially counterclockwise at 15° on both sides, starting from the axial circular cross-section flow channel. Six circular cross-section cooling medium inflow channels 16 and six cooling medium outflow channels 15 are evenly arranged axially on the packing box 5, respectively connecting to the flow channels on both sides. Positioning pins 11 for positioning the cooling circulation flow channel are provided at the bottom of each of the four packing boxes 5. The semi-circular cross-section flow channel on the right side of the front packing box 4 is fitted with the semi-circular cross-section flow channel on the left side of the first packing box 5, and the semi-circular cross-section flow channel on the right side of the first packing box 5 is fitted with the semi-circular cross-section flow channel on the left side of the second packing box 5 to form a circular cross-section flow channel. The remaining packing boxes 5 are connected in the same way, forming a spiral stepped flow channel (see Figure 6-13). Figure 18 ).

[0045] Referring to Figures 14-15, the left side of the rear packing box 6 is formed by rotating counterclockwise by 15° from the circular cross-section flow channel to form six semi-circular cross-section cooling medium inflow channels 16 and six cooling medium outflow channels 15. A flow channel positioning pin 11 is provided at the bottom of the rear packing box 6.

[0046] Referring to Figures 16-18, a square-section cooling medium mixing channel 17 is provided on the left circumferential side of the bottom box 7 so that the cooling medium from the six cooling medium inflow channels 16 can be mixed and evenly flow into the six cooling medium outflow channels 15.

[0047] Working principle: The packing cooling system is connected to the reciprocating compressor cylinder via flange bolts. The bottom box 7 contacts the cylinder through gaskets. The contact surfaces of the packing flange 3, the front packing box 4, multiple packing boxes 5, the rear packing box 6, and the bottom box 7 are sealed by external sealing rings 9 and internal sealing rings 10.

[0048] The cooling medium flows from the cooling medium inlet 12 on the packing flange 3 into the cooling medium inlet channel 16 on the left side of the front packing box 4, and then sequentially into the six spiral stepped cooling medium inlet channels 16 arranged on the front packing box 4, packing box 5, and rear packing box 6. Afterward, the cooling medium flows into the cooling medium mixing channel 17 on the left side of the bottom box 7 and then flows circumferentially at a certain angle. It then enters the six spiral stepped cooling medium outlet channels 15 arranged on the rear packing box 6, packing box 5, and front packing box 4, and then flows into the cooling medium outlet channel 15 on the left side of the front packing box. Finally, it flows into the cooling medium outlet 2 on the packing flange 3 and is discharged from the packing cooling system, completing one cycle.

[0049] The heat exchange using the packing cooling system described in this invention can quickly and evenly remove the frictional heat between the piston rod and the packing in the reciprocating compressor, as well as the heat from the high-temperature gas in the packing device. This reduces the temperature of the packing, prevents high-temperature gas leakage and packing failure at high temperatures, and achieves the goal of improving the service life of the packing and maintaining the compression efficiency of the compressor.

[0050] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments without departing from the technical essence of the present invention shall still fall within the scope of the present invention.

Claims

1. A reciprocating compressor packing cooling system, comprising a piston rod (1), a packing flange (3), a front packing box (4), a packing box (5), a rear packing box (6), and a bottom box (7), characterized in that: The piston rod (1) is sequentially and tightly fitted with a packing flange (3), a front packing box (4), four packing boxes (5), a rear packing box (6), and a bottom box (7). The packing flange (3), the front packing box (4), the packing box (5), the rear packing box (6), and the bottom box (7) form a connected spiral stepped cooling circulation channel. The contact surfaces between the packing flange (3), the front packing box (4), the packing box (5), the rear packing box (6), and the bottom box (7) are respectively sealed with annular outer sealing rings (9) located outside the cooling channel. The cooling medium inlet (12) and cooling medium outlet (2) located at both ends of the packing flange (3), the cooling medium inlet channel (15) and cooling medium outlet channel (16) of the front packing box (4), packing box (5), rear packing box (6) and bottom box (7) are all between the outer sealing ring (9) and the inner sealing ring (10); the front packing box (4), packing box (5), rear packing box (6) and bottom box (7) are filled with packing (8).

2. The reciprocating compressor packing cooling system as described in claim 1, characterized in that: The packing flange (3) is provided with a cooling medium inlet (12) and a cooling medium outlet (2) and an inspection hole (13) at both ends, and multiple bolt holes (14) are evenly arranged in the circumference.

3. The reciprocating compressor packing cooling system as described in claim 1, characterized in that: The front packing box (4) has a square cross-section cooling medium inflow channel (16) and a cooling medium inflow channel (15) arranged on the left side by rotating 165° clockwise from the bottom and top respectively. The front packing box (4) has twelve circular cross-section flow channels evenly and symmetrically arranged in the axial direction. There are six cooling medium inflow channels (16) and six cooling medium outflow channels (15), which are all connected to the flow channels on the left side. The front packing box (4) has (12) semi-circular cross-section flow channels evenly arranged in the circumferential direction by rotating 15° counterclockwise from the axial circular cross-section flow channel on the right side to form the cooling medium inflow channel (16) and the cooling medium outflow channel (15). A positioning pin (11) is set at the bottom of the front packing box (4).

4. The reciprocating compressor packing cooling system as described in claim 1, characterized in that: The packing box (5) has a semi-circular cross-section cooling medium inflow channel (16) and a cooling medium outflow channel (15) arranged circumferentially counterclockwise at 15° on both sides, with the axial circular cross-section flow channel as the starting point. Six circular cross-section cooling medium inflow channels (16) and six cooling medium outflow channels (15) are evenly arranged axially on the packing box (5), and are connected to the flow channels on both sides respectively. Positioning pins (11) for positioning the cooling circulation flow channel are provided at the bottom of the four packing boxes (5). The semi-circular cross-section flow channel on the right side of the front packing box (4) is attached to the semi-circular cross-section flow channel on the left side of the first packing box (5), and the semi-circular cross-section flow channel on the right side of the first packing box (5) is attached to the semi-circular cross-section flow channel on the left side of the second packing box (5) to form a circular cross-section flow channel. The remaining packing boxes (5) are connected in the same way to form a spiral stepped flow channel.

5. The reciprocating compressor packing cooling system as described in claim 1, characterized in that: The rear packing box (6) is formed by rotating 15° counterclockwise around the left side, starting from the circular cross-section flow channel, to form six semi-circular cross-section cooling medium inflow channels (16) and six cooling medium outflow channels (15). The bottom end of the rear packing box (6) is provided with a flow channel positioning pin (11).

6. The reciprocating compressor packing cooling system as described in claim 1, characterized in that: The bottom box (7) has a square cross-section cooling medium mixing channel (17) on the left circumferential direction.

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