Novel packing sealing structure

Abstract

The utility model relates to the technical field of packing sealing, in particular to a novel packing sealing structure which comprises packing, a plurality of packing boxes are arranged on one side of the packing, through holes are formed in the centers of the packing boxes in a penetrating mode, piston rods are installed in the through holes in a sliding mode, sealing grooves are formed in the packing boxes, and throttling rings are fixedly installed in the sealing grooves in one side. A plurality of sealing grooves are formed in the packing box, a plurality of sealing rings are installed in the other sealing grooves in a sliding mode, grooves are formed in the sealing rings in the radial direction, arc-shaped protrusions are arranged on the inner sides of the sealing rings, the oil scraping box is fixedly installed on one side of the packing box, and oil scraping grooves are formed in the oil scraping box. The novel packing sealing structure is provided with the packing box, a sealing groove is formed in the packing box, a plurality of sealing rings are installed in the sealing groove in a sliding mode, the inner sides of the sealing rings are arc-shaped protrusions, grooves are formed in the sealing rings in the radial direction, radial open grooves are formed in the outer circles of the sealing rings, and motion compensation is conducted on the sealing rings through tension springs and the radial open grooves. The sealing ring is in close contact with the piston rod, and sealing performance is improved.

Description

Technical Field

[0001] This utility model relates to the field of packing sealing technology, and in particular to a novel packing sealing structure. Background Technology

[0002] The main function of packing seals is to create a dynamic seal by pre-tightening or self-tightening under medium pressure, thereby generating a clamping force between the packing and rotating and stationary parts. This type of seal is commonly used in the moving parts of process machines in the machinery industry, such as centrifugal pumps, compressors, vacuum pumps, and valves. Commonly used packing materials include asbestos fabric, carbon fiber, rubber, flexible graphite, and engineering plastics. These are pre-formed into rings or strips (some require pre-impregnation with a lubricating filler) and employ a multi-ring or spiral multi-layer structure. During use, the sealing performance of packing seals is affected by wear of the sealing rings. Therefore, a new type of packing seal structure is provided. Utility Model Content

[0003] The main purpose of this utility model is to provide a new type of packing seal structure to solve the problem in the related technology that the sealing ring wears out and affects the seal when the encoder packing seal is in use.

[0004] To achieve the above objectives, according to one aspect of this utility model, a novel packing seal structure is provided, including a compressor cylinder body. A packing seal part composed of several packing boxes is provided on one side of the compressor cylinder body. A through hole is opened through the center of each packing box, and a piston rod is slidably installed in the through hole. Each of the several packing boxes has a sealing groove, and a throttling ring is fixedly installed in the sealing groove near the compressor cylinder body. Several sealing rings are also installed in sequence in the sealing groove. A tension spring is fixedly installed in the sealing groove, and the tension spring is used to compensate for the movement of the sealing rings. The structure also includes an oil scraper box, which is fixedly installed on one side of the packing box. An oil scraper groove is opened in the oil scraper box, and an oil scraper ring is fixedly installed in the oil scraper groove.

[0005] Furthermore, a radial groove is formed on the outer ring of the sealing ring, and a tension spring is fixedly installed in the sealing groove. The tension spring compensates for the movement of the sealing ring through the radial groove.

[0006] Furthermore, one end of the piston rod has an arc-shaped rounded corner, and several grooves are formed on the side wall of the piston rod, each groove being an arc-shaped groove.

[0007] Furthermore, the outer ring of the sealing ring is provided with a tension spring groove.

[0008] Furthermore, the oil scraper ring is in contact with the side wall of the piston rod, and the lubricating oil on the side wall of the piston rod flows into the oil scraper box through the oil scraper ring.

[0009] Furthermore, the sealing ring is made of rubber, and the sealing filler is composed of a sealing ring and a throttling ring stacked sequentially in the sealing groove.

[0010] Compared with the prior art, the present invention has the following beneficial effects:

[0011] 1. This novel packing seal structure is equipped with a packing box, and a sealing groove is opened inside the packing box. Several sealing rings are slidably installed in the sealing groove. The inner side of the sealing ring is arc-shaped protrusion, and a radial groove is opened on the sealing ring. A radial groove is opened on the outer ring of the sealing ring. The movement of the sealing ring is compensated by a tension spring through the radial groove, so that the sealing ring is in close contact with the piston rod, thereby increasing the sealing performance.

[0012] 2. The inductive encoder for a combined robot joint is provided with a piston rod. The side wall of the piston rod has several arc-shaped grooves, and the inner side of several sealing rings forms an arc-shaped protrusion that matches the arc-shaped grooves to increase the stability of the seal. One end of the piston rod has an arc-shaped rounded corner, making it easier for the piston rod to be inserted into the through hole. Attached Figure Description

[0013] Figure 1 This is a flowchart of the overall structure of the packing material in a preferred embodiment of the present invention;

[0014] Figure 2 This is a schematic cross-sectional view of the packing material in a preferred embodiment of the present invention;

[0015] Figure 3 This is a schematic diagram of the sealing ring structure in a preferred embodiment of the present invention;

[0016] Figure 4 This is a schematic cross-sectional view of the packing structure in a preferred embodiment of the present invention;

[0017] Figure 5 This is a schematic diagram of the piston rod structure in a preferred embodiment of the present invention.

[0018] Illustration:

[0019] 1. Stuffing box; 11. Sealing groove; 12. Sealing ring; 13. Tension spring groove; 14. Through hole; 15. Throttling ring; 122. Radial slot;

[0020] 2. Piston rod; 21. Groove;

[0021] 3. Oil scraper box; 31. Oil scraper groove; 32. Oil scraper ring;

[0022] 4. Compressor cylinder. Detailed Implementation

[0023] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0024] Please see Figures 1-5 As shown, the purpose of this embodiment is to provide a novel packing seal structure, including a compressor cylinder 4. A packing seal part composed of several packing boxes 1 is provided on one side of the compressor cylinder 4. A through hole 14 is opened through the center of the packing box 1. A piston rod 2 is slidably installed in the through hole 14. Each of the several packing boxes 1 has a sealing groove 11. A throttling ring 15 is fixedly installed in the sealing groove 11 near the compressor cylinder 4. Several sealing rings 12 are also installed in the sealing groove 11 in sequence. A tension spring is fixedly installed in the sealing groove 11 and is used to compensate for the movement of the sealing rings 12. It also includes an oil scraper box 3. The oil scraper box 3 is fixedly installed on one side of the packing box 1. An oil scraper groove 31 is opened in the oil scraper box 3. An oil scraper ring 32 is fixedly installed in the oil scraper groove 31.

[0025] A radial groove 122 is provided on the outer ring of the sealing ring 12.

[0026] The piston rod 2 has an arc-shaped rounded corner at one end, and several grooves 21 are provided on the side wall of the piston rod 2. Each groove 21 is an arc-shaped groove. The arc-shaped rounded corner makes it easier for the piston rod 2 to be inserted through the sealing ring 12. The groove 21 cooperates with the arc-shaped protrusion on the inner side of the sealing ring 12 to increase the sealing performance.

[0027] The outer ring of the sealing ring 12 has a tension spring groove 13, wherein one end of the tension spring is fixedly connected to the inner wall of the sealing groove 11, and the other end of the tension spring is fixedly connected to the inner wall of the tension spring groove 13 of the outer ring of the sealing ring 12.

[0028] The oil scraper ring 32 is in contact with the side wall of the piston rod 2. The lubricating oil on the side wall of the piston rod 2 flows into the oil scraper box 3 through the oil scraper ring 32. The oil scraper ring 32 makes the lubricating oil on the side wall of the piston rod 2 evenly spread and scrapes away the excess lubricating oil.

[0029] The sealing ring 12 is made of rubber, and the sealing packing is composed of the sealing ring 12 and the throttling ring 15 stacked in sequence in the sealing groove 11. The rubber sealing ring 12 increases the sealing performance when the sealing ring 12 contacts the piston rod 2. The arc-shaped sealing ring 12 cooperates with the groove 21 to increase the sealing performance.

[0030] Specifically, the piston rod 2 reciprocates linearly between the sealing rings 12. The side with airflow is connected to the cylinder side, and the piston on the cylinder side also reciprocates. The space between the cylinder and the piston is the working chamber, which expands or compresses the gas. When compressed, the gas will exert pressure on the first packing ring, which experiences the greatest force. Therefore, the first ring is also called the throttling ring 15. The sealing is gradually achieved through multiple stages of sealing rings 12. The sealing rings 12 have radial openings, and the outer ring of the sealing rings 12 has a tension spring groove 13. The tension spring provides circumferential dynamic compensation. When the seal or piston rod wears, the tension spring will automatically compensate.

[0031] In practical use, the piston rod 2 moves toward the throttling ring 15. The lubricating oil on the side wall of the piston rod 2 is evenly applied by the oil scraper ring 32. Excess lubricating oil flows into the oil scraper box 3 to prevent excessive lubricating oil from affecting subsequent steps. When the piston rod 2 passes through the sealing groove 11, the arc-shaped rounded corner at one end of the piston rod 2 makes it easier for the piston rod 2 to be inserted into the sealing ring 12. The tension spring makes the inner ring of the sealing ring 12 and the piston rod 2 in close contact, increasing the sealing performance.

[0032] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A novel packing seal structure, comprising a compressor cylinder (4), a packing seal part composed of a plurality of packing boxes (1) is arranged on one side of the compressor cylinder (4), and the packing seal part is filled with sealing packing, characterized in that, The filler box (1) is provided with a through hole (14) in the center, a piston rod (2) is slidably installed in the through hole (14), a sealing groove (11) is formed in each of the filler boxes (1), a throttle ring (15) is fixedly installed in the sealing groove (11) near the compressor cylinder (4), a plurality of sealing rings (12) are sequentially installed in the sealing groove (11), a tension spring is fixedly installed in the sealing groove (11) and used for movement compensation of the sealing ring (12), and the filler box (1) further comprises: An oil scraping box (3) is fixedly installed on one side of the filler box (1), the oil scraping box (3) is provided with an oil scraping groove (31), and the oil scraping groove (31) is fixedly installed with an oil scraping ring (32).

2. The novel packing seal structure according to claim 1, wherein A radial slot (122) is formed in the outer ring of the sealing ring (12).

3. The novel packing seal structure according to claim 1, wherein An arc-shaped round corner is formed at one end of the piston rod (2), and a plurality of arc-shaped grooves (21) are formed in the side wall of the piston rod (2).

4. The novel packing seal structure according to claim 1, wherein The outer ring of the sealing ring (12) is provided with a tension spring groove (13).

5. The novel packing seal structure according to claim 1, wherein The oil scraping ring (32) is attached to the side wall of the piston rod (2), and the lubricating oil on the side wall of the piston rod (2) flows into the oil scraping box (3) through the oil scraping ring (32).

6. The novel packing seal structure according to claim 1, wherein The sealing ring (12) is made of rubber, and the sealing filler is composed of the sealing ring (12) and the throttle ring (15) which are sequentially installed in the sealing groove (11).

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