Oil scraping device for compressor

Abstract

The oil scraping device for the compressor comprises an oil scraping flange arranged on the outer side of a piston rod in a sleeved mode, a gland and an oil scraping box which are arranged on the outer side of the piston rod in a sleeved mode are installed on the two sides of the oil scraping flange respectively, and a coaxial sealing ring is arranged between the gland and the piston rod. An oil scraping flange is arranged on the outer side of the piston rod, a first containing cavity is formed between the gland and the oil scraping flange, and an oil scraping ring set arranged on the outer side of the piston rod in a sleeved mode is arranged in the first containing cavity. Compared with the prior art, the oil scraper ring has the characteristics of high extrusion resistance, wear resistance and low friction, and can effectively prevent a large amount of lubricating oil from entering the oil scraper ring under the working condition of a large amount of oil, so that the oil blocking effect is greatly improved, the impact of the lubricating oil on the oil scraper ring is reduced, the service life of the oil scraper ring is prolonged, and the operation stability and reliability of the small compressor are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a compressor technical field, concretely is a kind of oil scraping device for compressor. BACKGROUND

[0002] In the operation process of compressor, oil scraping device plays a vital role, it can effectively control the flow of lubricating oil, prevent its leakage and ensure the normal operation of compressor. However, the existing oil scraping device has many limitations. When the oil quantity increases in operation, the traditional structure is impacted for a long time, and the oil scraping effect will decrease significantly. Especially for small compressor, the chamber space of its whole body is narrow, and the crosshead body is very close to the oil scraping device during operation. The splashed lubricating oil will seriously interfere with the oil scraping condition, resulting in poor oil scraping effect, and further affecting the performance and stability of compressor. The oil blocking ring in the traditional structure cannot effectively block the lubricating oil when facing larger oil quantity working condition, so that a large amount of lubricating oil enters the oil scraping ring, reduces the service life of the oil scraping ring, and increases the risk of lubricating oil leakage. SUMMARY

[0003] In view of the deficiencies of the prior art, the utility model provides an oil scraping device for compressor, which solves the problem of decreased oil scraping effect after long-time impact when the oil quantity increases in the operation of existing compressor.

[0004] To achieve the above purpose, the utility model discloses the following technical scheme: an oil scraping device for compressor, comprising an oil scraping flange sleeved on the outer side of a piston rod, a gland and an oil scraping box sleeved on the outer side of the piston rod are respectively installed on the two sides of the oil scraping flange, a coaxial sealing ring is arranged between the gland and the piston rod, a first containing cavity is formed between the gland and the oil scraping flange, an oil scraping ring group sleeved on the outer side of the piston rod is arranged in the first containing cavity, a second containing cavity is formed between the oil scraping box and the oil scraping flange, a tangential ring group sleeved on the outer side of the piston rod is arranged in the second containing cavity, and an oil discharge port is arranged between the lower end of the gland and the oil scraping flange.

[0005] Preferably, a splash plate is arranged above the oil discharge port, and the splash plate is inclined to the lower side.

[0006] Preferably, the gland, the oil scraping flange and the oil scraping box are connected by bolts.

[0007] Preferably, the oil scraping ring group adopts a double-edge structure.

[0008] Preferably, the coaxial sealing ring is composed of a special-shaped sliding ring made of PTFE material and an O-shaped ring.

[0009] Beneficial effects

[0010] The utility model provides a kind of oil scraping device for compressor, with following beneficial effects:

[0011] Replace the original oil blocking ring with the coaxial sealing ring composed of the special-shaped sliding ring and O-ring of PTFE material, the inner diameter thereof is closely combined with the piston rod, has higher extrusion resistance, wear resistance and low friction characteristics, under the working condition of large oil amount, can effectively block a large amount of lubricating oil from entering the oil scraping ring, greatly improves the oil blocking effect, reduces the impact of lubricating oil on the oil scraping ring, prolongs the service life of the oil scraping ring.

[0012] The oil scraping ring group adopts double-edge structure, compared with the traditional oil scraping ring, can more effectively scrape the lubricating oil on the surface of the piston rod, so that the surface of the piston rod remains clean after passing through the oil scraping ring group, the last ring group adopts 2 tangential rings, further reduces the oil leakage, ensures the cleanliness of the surface of the piston rod, effectively reduces the risk of lubricating oil leakage.

[0013] The splash plate inclined to the lower oblique side is arranged above the oil discharge port, which can effectively prevent the splashed lubricating oil from entering the inside of the oil scraping device, avoid the pollution and interference of the splashed lubricating oil on the oil scraping ring, thereby further improving the oil scraping effect and prolonging the overall service life of the oil scraping device.

[0014] The oil scraping device of the utility model is particularly suitable for the case of large oil amount during the movement of the crosshead body in small compressor, effectively solves the oil scraping problem caused by small chamber and splashed lubricating oil in small compressor, improves the operation stability and reliability of small compressor. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a structural schematic view of the utility model.

[0016] In the figure: 1, oil scraping flange; 2, gland; 3, coaxial sealing ring; 4, oil scraping ring group; 5, splash plate; 6, oil scraping box; 7, piston rod; 8, tangential ring group. DETAILED DESCRIPTION

[0017] The technical scheme in the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model, obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0018] Please refer to Figure 1The utility model provides a kind of technical scheme: a kind of oil scraping device for compressor, including the oil scraping flange 1 of sheathing in the outer side of piston rod 7, the gland 2 and oil scraping box 6 of sheathing in the outer side of piston rod 7 are respectively installed in the both sides of the oil scraping flange 1, coaxial seal ring 3 is equipped between the gland 2 with the piston rod 7, first accommodating cavity is formed between the gland 2 with the oil scraping flange 1, the oil scraping ring group 4 of sheathing in the outer side of piston rod 7 is equipped in the first accommodating cavity, second accommodating cavity is formed between the oil scraping box 6 with the oil scraping flange 1, tangential ring group 8 of sheathing in the outer side of piston rod 7 is equipped in the second accommodating cavity, and oil outlet is arranged between the lower end of the gland 2 with the oil scraping flange 1.

[0019] By adopting the above technical scheme, the oil scraping flange 1 serves as the main support structure of the entire device, and the gland 2 and the oil scraping box 6 are respectively installed on the two sides to provide mounting positions for the internal components. The coaxial seal ring 3 between the gland 2 and the piston rod 7 has an inner diameter that is in contact with the piston rod 7, and by utilizing its extrusion resistance, wear resistance and low friction characteristics, a large amount of lubricating oil is effectively blocked from entering the oil scraping ring group 4. The oil scraping ring group 4 in the first accommodating cavity adopts a double-edge structure, which can efficiently scrape off the lubricating oil on the surface of the piston rod 7. The tangential ring group 8 in the second accommodating cavity further reduces oil leakage. The oil outlet is used to discharge the lubricating oil scraped off by the oil scraping ring group 4.

[0020] The embodiment is further provided with a splash plate 5 above the oil outlet, which is inclined downward.

[0021] By adopting the above technical scheme, the splash plate 5 is arranged above the oil outlet and inclined downward. When there is splashing lubricating oil approaching the oil outlet, the splash plate 5 can change the splashing direction of the lubricating oil, so that it cannot enter the interior of the oil scraping device. This design effectively prevents the contamination and interference of splashing lubricating oil on the oil scraping ring and other components, ensures the cleanliness of the interior of the oil scraping device, and thus improves the overall performance and service life of the oil scraping device.

[0022] The embodiment is further provided with a splash plate 5 above the oil outlet, which is inclined downward.

[0023] By adopting the above technical scheme, the bolt connection provides reliable fastening force, ensuring that the three components are tightly combined to form a stable overall structure.

[0024] The embodiment is further provided with a splash plate 5 above the oil outlet, which is inclined downward.

[0025] By adopting the above technical scheme, the oil scraping ring group 4 adopts a double-edge structure, which greatly improves the oil scraping efficiency and effect.

[0026] The embodiment is further provided with a splash plate 5 above the oil outlet, which is inclined downward.

[0027] By the person skilled in the art, the parts in the case are connected in turn, and the specific connection and operation sequence should be referred to the working principle below, and the detailed connection means is the public known technology in the art, and the working principle and process are mainly introduced below.

[0028] When the compressor is running, the lubricating oil enters from the right side of the oil scraping device, first, the gland 2 will block a part of the splashing lubricating oil, as the piston rod 7 moves to the left, the lubricating oil attached to the piston rod 7 is brought into the coaxial sealing ring 3, the coaxial sealing ring 3 scrapes most of the lubricating oil by virtue of its special material and structure, and the remaining small amount of lubricating oil enters the oil scraping ring group 4 along with the piston rod 7, the double-edge structure of the oil scraping ring group 4 further scrapes the lubricating oil on the surface of the piston rod 7, so that the surface of the piston rod 7 is basically clean, the piston rod 7 passing through the oil scraping ring group 4 further passes through the tangential ring group 8, which further ensures the cleanliness of the surface of the piston rod 7 and prevents the leakage of lubricating oil, and the lubricating oil scraped by the oil scraping ring group 4 returns to the middle body cavity from the oil discharge port and finally returns to the oil pool of the machine body.

[0029] It should be noted that, in the present text, relational terms such as first and second and the like can only be used to distinguish one entity or action from another entity or action, without necessarily requiring or implying that there is any such actual relationship or order between these entities or actions. Moreover, the terms "comprises", "comprising", or any other variant thereof are intended to cover non-exclusive inclusions, so that a process, method, article, or apparatus that includes a list of elements does not only include those elements, but also includes other elements not explicitly listed, or further includes elements inherent in such a process, method, article, or apparatus. Without more limitations, the statement "comprises a limited element" does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes the element.

[0030] Although the embodiments of the present application have been shown and described, it should be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. An oil scraping device for a compressor, characterized in that, The system includes an oil scraper flange (1) fitted on the outside of the piston rod (7). On both sides of the oil scraper flange (1) are a pressure cap (2) fitted on the outside of the piston rod (7) and an oil scraper box (6). A coaxial sealing ring (3) is provided between the pressure cap (2) and the piston rod (7). A first receiving cavity is formed between the pressure cap (2) and the oil scraper flange (1). An oil scraper ring assembly (4) fitted on the outside of the piston rod (7) is provided in the first receiving cavity. A second receiving cavity is formed between the oil scraper box (6) and the oil scraper flange (1). A tangential ring assembly (8) fitted on the outside of the piston rod (7) is provided in the second receiving cavity. An oil drain port is provided between the lower end of the pressure cap (2) and the oil scraper flange (1).

2. The oil scraping device for a compressor according to claim 1, characterized in that, A splash guard (5) is provided above the oil drain port, and the splash guard (5) is inclined downwards.

3. The oil scraping device for a compressor according to claim 2, characterized in that, The pressure cap (2), the oil scraper flange (1), and the oil scraper box (6) are connected by bolts.

4. The oil scraping device for a compressor according to claim 1, characterized in that, The oil scraper ring assembly (4) adopts a double-edged structure.

5. The oil scraping device for a compressor according to claim 1, characterized in that, The coaxial sealing ring (3) consists of a PTFE-material shaped slip ring and an O-ring.

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