Sealing packing assembly with multiple sealing structure for reciprocating compressor and manufacturing equipment thereof

Abstract

The present invention discloses a sealing packing assembly with a multiple sealing structure for a reciprocating compressor and a manufacturing device thereof, which relates to the technical field of multiple sealing of reciprocating compressors, and aims to solve the problem that the pressure of the packing ring in the existing reciprocating compressor is prone to uneven distribution after being compressed to a certain extent, which will cause local excessive compression or deformation of the packing ring. The present invention comprises a pair of glands arranged on the piston rod of the reciprocating compressor, a plurality of partition plates are arranged between the glands, a plurality of symmetrically arranged elastic members are respectively arranged on the top and bottom of the partition plates, the elastic members are distributed in an equidistant annular pattern on the partition plates, the middle parts of the two opposite elastic members are bent in opposite directions, and a packing ring is arranged between the two adjacent partition plates. The present invention has the advantage that the packing ring can be squeezed and evenly extended to both sides, thereby preventing the packing ring from being locally over-compressed or deformed after being compressed, which affects the sealing effect of the packing ring.

Description

Technical Field

[0001] The invention relates to the technical field of multiple seals of reciprocating compressors, and more particularly to a sealing packing assembly of a multiple seal structure of a reciprocating compressor and a manufacturing device thereof. Background Art

[0002] The multiple sealing structure of the reciprocating compressor is an important sealing device, usually composed of multiple packing rings and glands, designed to effectively prevent gas or liquid leakage. It provides a stronger sealing effect by creating multiple sealing layers between the compressor piston and the cylinder. These packing rings are generally made of wear-resistant and high-temperature resistant elastic materials, which can cope with high-pressure and high-temperature working conditions. The multiple sealing design not only improves the sealing performance and reduces the risk of leakage, but also extends the service life of the equipment and reduces maintenance costs. Through this structure, reciprocating compressors can achieve higher working efficiency and safety.

[0003] In a reciprocating compressor, after the packing ring is compressed to a certain extent, its deformation state and sealing performance are affected by many factors, among which uneven force is a major factor. For example, the pressure applied by the gland is prone to uneven distribution, and some parts of the packing ring may be subjected to excessive pressure, while other parts are under-pressed, which will cause the packing ring to be partially over-compressed or deformed, causing some areas to lose the sealing effect and increase the risk of gas or liquid leakage. In view of this, we propose a sealing packing assembly with a multiple sealing structure for a reciprocating compressor and a manufacturing device thereof. Summary of the invention

[0004] The object of the present invention is to provide a sealing packing assembly with a multiple sealing structure for a reciprocating compressor and a manufacturing device thereof, aiming to solve the problem in existing reciprocating compressors that the pressure of the packing ring is prone to uneven distribution after being compressed to a certain extent, which will cause local over-compression or deformation of the packing ring.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: a sealing packing assembly with a multiple sealing structure of a reciprocating compressor, comprising a pair of pressure covers arranged on the piston rod of the reciprocating compressor, a plurality of partition plates are arranged between the pressure covers, a plurality of symmetrically arranged elastic members are respectively arranged on the top and bottom of the partition plates, the elastic members are distributed in an equidistant annular pattern on the partition plates, the middle parts of two opposite elastic members are bent in opposite directions, a packing ring is arranged between two adjacent partition plates, the top and bottom of the packing ring are respectively close to each other to form an extrusion part of a concave semicircular structure, the cross-section of the packing ring after being concave forms a horizontal "8"-shaped structure, and the end of the elastic member close to the extrusion part after being bent is respectively located inside the extrusion part and fits with its inner wall.

[0006] Preferably, a surface of the elastic member in contact with the extrusion portion is in an arc-shaped structure corresponding to an inner wall of the extrusion portion, and ends of the elastic members distributed in an annular shape are in contact with each other.

[0007] Preferably, the outer wall of the arc-shaped structure of the elastic member extends to form an inclined anti-slip portion, and the interior of the extrusion portion is provided with symmetrically arranged slots, and the other ends of the anti-slip portions are respectively inserted into the slots.

[0008] A manufacturing device for a sealing packing assembly of a reciprocating compressor with multiple sealing structures, suitable for any of the above-mentioned sealing packing assemblies of a reciprocating compressor with multiple sealing structures, comprising a molding machine body and a pair of molds arranged on its workbench, wherein an annular cavity is provided on opposite sides of the molds, the cross section of the cavity is a semicircular structure, and the inner wall of the cavity is provided with a convex ring, the convex ring is a semicircular structure, the top of the convex ring is provided with a pair of structural rings with opposite inclination directions, the interior of the convex ring is a hollow setting, the top of the convex ring is provided with a push ring, the bottom of the push ring penetrates the convex ring to the inside thereof and is slidably connected to the inner wall of the penetrated part, and the top of the mold is provided with multiple sets of demoulding mechanisms;

[0009] The demoulding mechanism includes an air cavity opened inside the mold, the inner end wall of the air cavity is fixedly connected to a spring, the inner wall of the air cavity is slidably connected to a piston plate, the other end of the spring is fixedly connected to the outer wall of the piston plate, the end of the piston plate away from the spring is fixedly connected to a piston rod, the other end of the piston rod penetrates the inner wall of the air cavity to the outside and is slidably connected to the inner wall of the penetrated part, and the positions of the piston rods on the upper and lower sides correspond, and the interior of the air cavity is connected to the interior of the convex ring.

[0010] Preferably, an air inlet groove connected to the outside is formed on the inner end wall of the air cavity, and a rubber sealing sheet is embedded in the inner end wall of the air cavity, one side of which can be pushed open when external gas enters the air inlet groove, and the rubber sealing sheet covers and seals the opening of the air inlet groove. The interior of the push ring is hollow, and the interior of the push ring is connected to the interior of the convex ring, and the outer wall of the push ring is provided with a plurality of exhaust grooves connected to the interior thereof.

[0011] Preferably, the outer edge of one end of the push ring away from the convex ring extends to both sides to form an extension portion, and the top of the extension portion is a semicircular structure corresponding to the top of the convex ring.

[0012] Preferably, a receiving groove is provided on the top of the convex ring, and the shape of the receiving groove corresponds to the extension portion.

[0013] Preferably, the outer wall of the piston rod near the piston plate extends outward to form an abutment portion, and the top of the abutment portion abuts against the inner end wall of the air cavity under the elastic force of the spring.

[0014] Preferably, the push ring is located between the structural rings, and the push ring and the structural ring have the same center.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The present invention provides a gland, a partition plate, an elastic member, a packing ring, and an extrusion portion. The gland applies pressure to the elastic member through the partition plate. The end of the elastic member is inserted into the extrusion portion of the semicircular structure. The elastic member is distributed in an equidistant ring on the partition plate. The middle parts of the two opposite elastic members are bent in opposite directions. When the elastic member is deformed after being compressed, it squeezes the inner wall of the extrusion portion formed by the depression of the packing ring through its own elasticity. The cross-section of the packing ring is a horizontal "8"-shaped structure. When the elastic member is deformed to squeeze the extrusion plate, the packing ring is squeezed and extended evenly to both sides, thereby preventing the packing ring from being locally over-compressed or deformed after being compressed, affecting the sealing effect of the packing ring.

[0017] 2. The anti-slip portion formed by extending the elastic member in the present invention is inserted into the slot, so that when the elastic member squeezes the extrusion portion, the anti-slip portion can limit the packing ring through the slot, further increasing the uniformity of the force on the packing ring when the elastic member squeezes the extrusion portion.

[0018] 3. In the present invention, one side of the elastic member fitting portion and the inner wall of the extrusion portion presents a corresponding arc structure, which enables the elastic member to better fit the extrusion portion, so that when the elastic member extrude the extrusion portion, the packing ring is subjected to more uniform force. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the sealing packing assembly in the present invention;

[0020] Figure 2 It is a schematic diagram of the split structure of the packing ring in the present invention;

[0021] Figure 3 is a cross-sectional view of a partition plate in the present invention;

[0022] Figure 4 for Figure 3 A local enlarged view of point A in FIG.

[0023] Figure 5 is a cross-sectional view of a packing ring in the present invention;

[0024] Figure 6 It is a structural schematic diagram of a manufacturing device for a sealing packing assembly in the present invention;

[0025] Figure 7 It is a structural schematic diagram of the mold in the present invention;

[0026] Figure 8 is a cross-sectional view of the mold in the present invention;

[0027] Fig. 9 for Figure 8 A local enlarged view of point B in FIG.

[0028] Fig.10 for Figure 8 A local enlarged view of point C in FIG.

[0029] Fig.11 It is a schematic diagram of the split structure of the push ring in the present invention.

[0030] Description of the numbers in the figure:

[0031] 1. Pressure cover; 2. Partition plate; 3. Elastic member; 4. Packing ring; 5. Extrusion part; 6. Anti-skid part; 7. Slot; 8. Molding machine body; 9. Mold; 10. Cavity; 11. Convex ring; 12. Structural ring; 13. Push ring; 14. Air cavity; 15. Spring; 16. Piston plate; 17. Piston rod; 18. Air inlet groove; 19. Rubber sealing sheet; 20. Exhaust groove; 21. Extension part; 22. Storage groove; 23. Abutment part. DETAILED DESCRIPTION

[0032] like Figures 1 to 5 As shown, a sealing packing assembly of a reciprocating compressor with a multiple sealing structure comprises a pair of glands 1 arranged on a piston rod 17 of the reciprocating compressor, a plurality of partition plates 2 are arranged between the glands 1, a plurality of symmetrically arranged elastic members 3 are respectively arranged on the top and bottom of the partition plates 2, the elastic members 3 are equidistantly distributed in annular shapes on the partition plates 2, the middle parts of two opposite elastic members 3 are bent in opposite directions, a packing ring 4 is arranged between two adjacent partition plates 2, the top and bottom of the packing ring 4 are respectively close to each other to form an extrusion part 5 of a concave semicircular structure, the cross section of the packing ring 4 after being concave forms a horizontal "8"-shaped structure, and the ends of the elastic members 3 close to the extrusion part 5 after being bent are respectively located inside the extrusion part 5 and fit with the inner wall thereof;

[0033] Specifically, the pressure cover 1 applies pressure to the elastic member 3 through the partition plate 2, and the end of the elastic member 3 is inserted into the extrusion portion 5 of the semicircular structure, and the elastic member 3 is distributed in an equidistant ring shape on the partition plate 2, and the middle parts of the two opposite elastic members 3 are bent in opposite directions, so that when the elastic member 3 is deformed after being compressed, it squeezes the inner wall of the extrusion portion 5 formed by the depression of the packing ring 4 through its own elasticity, and the cross-section of the packing ring 4 is a horizontal "8"-shaped structure, which makes the packing ring 4 squeezed and extended evenly to both sides when the elastic member 3 is deformed to squeeze the extrusion plate, so as to prevent the packing ring 4 from being locally over-compressed or deformed after being compressed, affecting the sealing effect of the packing ring 4.

[0034] Furthermore, a surface of the elastic member 3 that is in contact with the extrusion portion 5 is in an arc-shaped structure corresponding to the inner wall of the extrusion portion 5 , and ends of the elastic members 3 that are distributed in an annular shape are in contact with each other.

[0035] Specifically, one side of the elastic member 3 that fits the extrusion portion 5 has an arc-shaped structure corresponding to the inner wall of the extrusion portion 5, which allows the elastic member 3 to better fit the extrusion portion 5, so that when the elastic member 3 extrude the extrusion portion 5, the force on the packing ring 4 is more uniform.

[0036] Furthermore, the outer wall of the arc-shaped structure of the elastic member 3 extends to form an inclined anti-slip portion 6 , and the interior of the extrusion portion 5 is provided with symmetrically arranged slots 7 , and the other ends of the anti-slip portion 6 are respectively inserted into the slots 7 .

[0037] Specifically, the anti-slip portion 6 formed by extending the elastic member 3 is inserted into the slot 7, so that when the elastic member 3 squeezes the extrusion portion 5, the anti-slip portion 6 can limit the packing ring 4 through the slot 7, further increasing the uniformity of the force on the packing ring 4 when the elastic member 3 squeezes the extrusion portion 5.

[0038] like Figures 6 to 11 As shown, a manufacturing device for a sealing packing assembly with a multiple sealing structure for a reciprocating compressor is suitable for any of the above-mentioned sealing packing assemblies with a multiple sealing structure for a reciprocating compressor, comprising a molding machine body 8 and a pair of molds 9 arranged on its workbench, an annular cavity 10 is opened on the opposite sides of the molds 9, the cross-section of the cavity 10 is a semicircular structure, and the inner wall of the cavity 10 is provided with a convex ring 11, the convex ring 11 is a semicircular structure, the top of the convex ring 11 is provided with a pair of structural rings 12 with opposite inclination directions, the interior of the convex ring 11 is a hollow setting, the top of the convex ring 11 is provided with a push ring 13, the bottom of the push ring 13 penetrates the convex ring 11 to the inside and is slidably connected with the inner wall of the penetrated part, and multiple sets of demolding mechanisms are arranged on the top of the mold 9.

[0039] The demoulding mechanism includes an air cavity 14 opened inside the mold 9, the inner end wall of the air cavity 14 is fixedly connected to a spring 15, the inner wall of the air cavity 14 is slidably connected to a piston plate 16, the other end of the spring 15 is fixedly connected to the outer wall of the piston plate 16, the end of the piston plate 16 away from the spring 15 is fixedly connected to a piston rod 17, the other end of the piston rod 17 penetrates the inner wall of the air cavity 14 to the outside and is slidably connected to the inner wall of the penetrated part, and the positions of the upper and lower piston rods 17 correspond, and the interior of the air cavity 14 is connected to the interior of the convex ring 11.

[0040] Specifically, the material to be molded into the packing ring 4 is placed in the cavity 10 on the mold 9, and then the mold 9 is driven to close by the molding machine body 8, so that the material is molded into the packing ring 4. During this process, the convex ring 11 will form a fitting portion of the packing ring 4, and the structural ring 12 will form a slot 7 in the fitting portion, thereby completing the production of the packing ring 4.

[0041] It should be noted that, compared with directly molding the packing ring 4 using the mold cavity 10, the convex ring 11 and the structural ring 12 provided in the mold cavity 10 undoubtedly increase the contact area and adhesion degree with the packing ring 4, which makes it difficult to demold the packing ring 4 after molding. Therefore:

[0042] When the molds 9 are close to each other for mold closing, the piston rods 17 on the molds 9 block each other, so that the piston rod 17 moves toward the inside of the air cavity 14, and the piston rod 17 squeezes the piston plate 16 to move inside the air cavity 14. Similarly, the piston plate 16 moves to compress the spring 15. When the molding is completed and the molds 9 are separated, the piston rods 17 move away from each other, and the spring 15 will push the piston plate 16 to return to its original position under its own elastic force. The return movement of the piston plate 16 will squeeze the air in the air cavity 14, so that the gas is squeezed into the inside of the convex ring 11, and as the gas entering the inside of the convex ring 11 gradually increases, the gas pressure increases, so that the gas pushes the push ring 13, so that the push ring 13 moves, and the push ring 13 pushes the molded filler ring 4, so that the filler ring 4 is separated from the cavity 10, thereby completing the demolding.

[0043] Furthermore, an air inlet groove 18 connected to the outside is formed on the inner end wall of the air cavity 14, and a rubber sealing sheet 19 is embedded in the inner end wall of the air cavity 14, one side of which can be pushed open when external gas enters the air inlet groove 18. The rubber sealing sheet 19 covers and seals the opening of the air inlet groove 18. The interior of the push ring 13 is hollow, and the interior of the push ring 13 is connected to the interior of the convex ring 11. The outer wall of the push ring 13 is provided with a plurality of exhaust grooves 20 connected to the interior thereof.

[0044] Specifically, when the piston rod 17 pushes the piston plate 16 to move, the air pressure in the air cavity 14 changes, causing the outside gas to enter the air inlet groove 18, and lift one side of the rubber sealing sheet 19 to enter the interior of the air cavity 14. When the piston plate 16 is reset, the rubber sealing sheet 19 cannot be lifted, and the gas can only enter the convex ring 11, so that after the push ring 13 moves, the gas is discharged from the exhaust groove 20, so that the gas pushes the molded packing ring 4, thereby further preventing the molded packing ring 4 from sticking to the cavity 10 and preventing the packing ring 4 from being difficult to remove.

[0045] Furthermore, the outer edge of one end of the push ring 13 away from the convex ring 11 extends to both sides to form an extension portion 21 , and the top of the extension portion 21 is a semicircular structure corresponding to the top of the convex ring 11 .

[0046] Specifically, the extension portion 21 formed by extending the push ring 13 allows the push ring 13 to increase the contact area with the packing ring 4, which can not only increase the pushing effect of the push ring 13 on the packing ring 4, but also reduce the probability that the push ring 13 pushes the packing ring 4, resulting in damage to the packing ring 4 that has not been completely cooled.

[0047] Furthermore, a receiving groove 22 is formed on the top of the convex ring 11 , and the shape of the receiving groove 22 corresponds to the extending portion 21 .

[0048] Specifically, the receiving groove 22 disposed on the top of the convex ring 11 can receive the extension portion 21 to prevent the extension portion 21 from being in the cavity 10 and affecting the molding of the packing ring 4 .

[0049] Furthermore, the outer wall of the piston rod 17 near the piston plate 16 extends outward to form an abutment portion 23 , and the top of the abutment portion 23 abuts against the inner end wall of the air cavity 14 under the elastic force of the spring 15 .

[0050] Specifically, the abutment portion 23 formed by the piston rod 17 abuts against the inner end wall of the air cavity 14 , thereby preventing the piston plate 16 from moving to cover and seal the connection between the air cavity 14 and the convex ring 11 .

[0051] Furthermore, the push ring 13 is located between the structural rings 12 , and the push ring 13 and the structural ring 12 have the same center.

[0052] Specifically, the push ring 13 is located between the structural rings 12 , which can further ensure the stability of the packing ring 4 when the push ring 13 pushes the packing ring 4 and when the packing ring 4 is separated from the mold ring, thereby reducing the probability that only one side of the structural ring 12 is pulled out of the slot 7 .

[0053] Working principle: This embodiment provides a sealing packing assembly with a multiple sealing structure of a reciprocating compressor, wherein the pressure cover 1 applies pressure to the elastic member 3 through the partition plate 2, and the end of the elastic member 3 is inserted into the extrusion portion 5 of the semicircular structure, and the elastic member 3 is distributed in an equidistant ring shape on the partition plate 2, and the middle parts of the two opposite elastic members 3 are bent in opposite directions, so that when the elastic member 3 is deformed after being compressed, it squeezes the inner wall of the extrusion portion 5 formed by the depression of the packing ring 4 through its own elasticity, and the cross-section of the packing ring 4 is a horizontal "8"-shaped structure, which makes the packing ring 4 squeezed and extended evenly to both sides when the elastic member 3 is deformed to squeeze the extrusion plate, thereby preventing the packing ring 4 from being locally over-compressed or deformed after being compressed, affecting the sealing effect of the packing ring 4.

[0054] The embodiments of the present invention disclose preferred embodiments, but are not limited thereto. A person skilled in the art can easily understand the spirit of the present invention based on the above embodiments and make different extensions and changes. However, as long as they do not deviate from the spirit of the present invention, they are all within the protection scope of the present invention.

Claims

1. A manufacturing device for a sealing packing assembly of a reciprocating compressor with a multiple sealing structure, characterized in that: The invention comprises a molding machine body (8) and a pair of molds (9) arranged on the workbench thereof, wherein an annular cavity (10) is provided on opposite sides of the molds (9), the cross section of the cavity (10) is a semicircular structure, and the inner wall of the cavity (10) is provided with a convex ring (11), the convex ring (11) is a semicircular structure, the top of the convex ring (11) is provided with a pair of structural rings (12) with opposite inclination directions, the interior of the convex ring (11) is hollow, the top of the convex ring (11) is provided with a push ring (13), the bottom of the push ring (13) penetrates the convex ring (11) to the inside thereof and is slidably connected to the inner wall of the penetrated part, and the top of the mold (9) is provided with a plurality of demoulding mechanisms; The demoulding mechanism comprises an air cavity (14) opened inside the mold (9), the inner end wall of the air cavity (14) is fixedly connected to a spring (15), the inner wall of the air cavity (14) is slidably connected to a piston plate (16), the other end of the spring (15) is fixedly connected to the outer wall of the piston plate (16), the end of the piston plate (16) away from the spring (15) is fixedly connected to a piston rod (17), the other end of the piston rod (17) penetrates the inner wall of the air cavity (14) to the outside and is slidably connected to the inner wall of the penetrated part, and the positions of the piston rods (17) on the upper and lower sides correspond to each other, and the interior of the air cavity (14) is communicated with the interior of the convex ring (11); The inner end wall of the air cavity (14) is provided with an air inlet groove (18) connected to the outside, and the inner end wall of the air cavity (14) is embedded with a rubber sealing sheet (19) on one side of which can be pushed open when external gas enters the air inlet groove (18). The rubber sealing sheet (19) covers and seals the opening of the air inlet groove (18). The interior of the push ring (13) is hollow, and the interior of the push ring (13) is connected to the interior of the convex ring (11). The outer wall of the push ring (13) is provided with a plurality of exhaust grooves (20) connected to the interior thereof.

2. The manufacturing equipment of the sealing packing assembly of the multiple sealing structure of a reciprocating compressor according to claim 1 is characterized in that: The outer edge of one end of the push ring (13) away from the convex ring (11) extends to both sides to form an extension portion (21), and the top of the extension portion (21) is a semicircular structure corresponding to the top of the convex ring (11).

3. The manufacturing equipment of the sealing packing assembly of the multiple sealing structure of a reciprocating compressor according to claim 2 is characterized in that: A receiving groove (22) is provided at the top of the convex ring (11), and the shape of the receiving groove (22) corresponds to the extension portion (21).

4. The manufacturing equipment of the sealing packing assembly of the multiple sealing structure of a reciprocating compressor according to claim 1 is characterized in that: The outer wall of the piston rod (17) near the piston plate (16) extends outward to form an abutment portion (23), and the top of the abutment portion (23) abuts against the inner end wall of the air cavity (14) under the elastic force of the spring (15).

5. The manufacturing equipment of the sealing packing assembly of the multiple sealing structure of a reciprocating compressor according to claim 1 is characterized in that: The push ring (13) is located between the structural rings (12), and the push ring (13) and the structural ring (12) have the same center.

6. A sealing packing assembly with multiple sealing structures for a reciprocating compressor, manufactured by using the manufacturing equipment for the sealing packing assembly with multiple sealing structures for a reciprocating compressor as claimed in claim 1, characterized in that: The invention comprises a pair of glands (1) arranged on the piston rod (17) of a reciprocating compressor, a plurality of partition plates (2) are arranged between the glands (1), a plurality of symmetrically arranged elastic members (3) are respectively arranged on the top and bottom of the partition plates (2), the elastic members (3) are distributed in an equidistant annular pattern on the partition plates (2), the middle portions of two opposing elastic members (3) are bent in opposite directions, a packing ring (4) is arranged between two adjacent partition plates (2), the top and bottom of the packing ring (4) are respectively close to each other to form a concave semicircular extrusion portion (5), the cross section of the packing ring (4) forms a horizontal "8"-shaped structure after the concave portion, and the ends of the elastic members (3) close to the extrusion portion (5) after the bending are respectively located inside the extrusion portion (5) and fit with the inner wall thereof.

7. A sealing packing assembly of a reciprocating compressor multiple sealing structure according to claim 6, characterized in that: The surface of the elastic member (3) that contacts the extrusion portion (5) presents an arc-shaped structure corresponding to the inner wall of the extrusion portion (5), and the ends of the elastic members (3) distributed in an annular shape are in contact with each other.

8. The sealing packing assembly of the multiple sealing structure of a reciprocating compressor according to claim 6, characterized in that: The outer wall of the arc-shaped structure of the elastic member (3) extends to form an inclined anti-slip portion (6), and the interior of the extrusion portion (5) is provided with symmetrically arranged slots (7), and the other ends of the anti-slip portions (6) are respectively inserted into the slots (7).

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