New type of oil scraper for reciprocating compressor

Abstract

This utility model relates to the technical field of polysilicon production equipment, specifically to a novel oil scraper for a reciprocating compressor, comprising: a piston rod penetrating the scraper housing, and an oil scraping device disposed inside the scraper housing. Using this novel oil scraper for a reciprocating compressor can reduce lubricating oil leakage, further ensuring the stability of polysilicon product quality.

Description

Technical Field

[0001] This utility model relates to the technical field of polysilicon production equipment, specifically to a novel oil scraper for a reciprocating compressor. Background Technology

[0002] In the operation of existing vertical reciprocating compressors, the crankcase at the bottom of the compressor body serves as the unit's oil tank, storing all the unit's lubricating oil. The lubricating oil is delivered to various moving lubrication parts of the compressor via an oil pump. Under the continuous reciprocating action of the crosshead, some of the lubricating oil is carried upwards. At this time, the oil scraper installed at the top undertakes the important task of scraping down this part of the lubricating oil and returning it to the oil tank.

[0003] However, during long-term operation, many problems gradually emerged. On the one hand, the lubricating oil deteriorates and becomes viscous due to oxidation and impurities during use, which easily clogs the oil return hole of the scraper. Once the oil return hole is blocked, the lubricating oil cannot be scraped off smoothly and leaks along the piston rod into the upper compartment. When the leakage is severe, the lubricating oil will leak further upward into the cylinder. This not only wastes lubricating oil and increases production costs, but also contaminates the transported medium, which has a serious negative impact on the quality of polysilicon products and reduces the product qualification rate and stability. On the other hand, when traditional scrapers face the problem of blocked oil return holes, they often need to be shut down for maintenance and the cover plate needs to be removed for cleaning. This process not only consumes a lot of manpower and resources, but also leads to prolonged equipment downtime, affecting production efficiency and increasing the company's operating costs. In addition, the scraping efficiency of traditional scrapers is relatively low, which is difficult to meet the growing production demand and cannot guarantee the long-term stable operation of the compressor. Utility Model Content

[0004] The purpose of this invention is to overcome the problems of oil scraper blockage and leakage in the existing technology, and to provide a new type of oil scraper for reciprocating compressors. This new type of oil scraper for reciprocating compressors has the advantages of reducing internal leakage and blockage of lubricating oil.

[0005] To achieve the above objectives, this utility model provides a novel oil scraper for a reciprocating compressor, comprising: a piston rod penetrating the oil scraper housing, and an oil scraping device disposed inside the oil scraper housing;

[0006] The oil scraping device includes a primary oil scraping ring, an oil scraping ring group, and a throttling ring arranged sequentially around the piston rod, so that the oil on the piston rod can be scraped off sequentially through the primary oil scraping ring, the oil scraping ring group, and the throttling ring;

[0007] Furthermore, the oil scraper housing is provided with an oil return hole and an oil return guide groove is provided on the inner wall. The oil return guide groove is connected to the oil return hole. The oil scraped by the oil scraper first flows through the oil return guide groove and then flows back through the oil return hole.

[0008] The above technical solution solves the problem that lubricating oil deteriorates and becomes viscous during use due to oxidation and impurities, which can easily clog the oil return hole of the scraper, leading to lubricating oil leakage and waste. In addition, it may also contaminate the transported medium and have a serious negative impact on the quality of polysilicon products. Attached Figure Description

[0009] Figure 1 This is a schematic diagram (a) of the novel oil scraper for the reciprocating compressor described in the specific implementation method.

[0010] Figure 2 This is a schematic diagram (II) of the new type of oil scraper for the reciprocating compressor described in the specific implementation method.

[0011] Figure 3 This is a schematic diagram of the return oil guide groove described in the specific implementation method;

[0012] Figure 4 This is a schematic diagram of the throttling ring described in the specific implementation method.

[0013] Explanation of reference numerals in the attached figures

[0014] 1-Oil scraper housing; 1a-Oil return hole; 1b-Oil return guide groove; 2-Piston rod; 3-Oil scraping device; 3a-Primary oil scraper ring; 3b-Oil scraper ring assembly; 3c-Throttle ring; 4-Nitrogen gas source pipe; 4a-Pressure sensor; 4b-Check valve; 4c-Solenoid valve; 5-Oil scraper flange joint; 6-Oil scraper flange; 7-Temperature sensor; 8-Vibration sensor; 9-Level sensor; 10-Oil tank compartment partition. Detailed Implementation

[0015] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of the present invention.

[0016] In this utility model, unless otherwise stated, directional terms such as "up, down, left, right, front, back, inside, outside" in the terminology only represent the orientation of the term in its conventional use or are common terms understood by those skilled in the art, and should not be regarded as a limitation on the term.

[0017] like Figure 1 and Figure 2As shown, this utility model provides a novel oil scraper for a reciprocating compressor, including: a piston rod 2 penetrating the oil scraper housing 1, and an oil scraping device 3 disposed inside the oil scraper housing 1;

[0018] The oil scraping device 3 includes a primary oil scraping ring 3a, an oil scraping ring group 3b and a throttling ring 3c arranged sequentially around the piston rod 2, so that the oil on the piston rod 2 can be scraped off sequentially through the primary oil scraping ring 3a, the oil scraping ring group 3b and the throttling ring 3c.

[0019] Furthermore, the oil scraper housing 1 is provided with an oil return hole 1a and an oil return guide groove 1b is provided on the inner wall. The oil return guide groove 1b is connected to the oil return hole 1a. The oil scraped by the oil scraper 3 first flows through the oil return guide groove 1b and then flows back through the oil return hole 1a.

[0020] The novel oil scraper for reciprocating compressors provided by this utility model, through the arrangement of a three-stage structure of a primary oil scraping ring 3a, an oil scraping ring group 3b, and a throttling ring 3c surrounding the piston rod 2, can sequentially scrape, block, and regulate the lubricating oil on the piston rod 2, so that most of the lubricating oil flows back, which can effectively reduce the leakage of lubricating oil into the upper compartment and cylinder, and further reduce the impact on the quality of polycrystalline silicon products.

[0021] In this utility model, in a preferred embodiment, such as Figure 4 As shown, the throttling ring 3c consists of at least two rings.

[0022] In this utility model, in order to avoid the oil return hole 1a being blocked and affecting the operation of the device, according to a preferred embodiment, a nitrogen gas source pipe 4 is connected to the top of the oil scraper housing 1. The nitrogen gas source pipe 4 can introduce nitrogen gas to clear the blockage when the oil return hole 1a is blocked.

[0023] In order to control the flow rate of nitrogen gas entering the nitrogen gas source pipe 4 and prevent nitrogen backflow, in some preferred embodiments, a pressure sensor 4a, a check valve 4b and a solenoid valve 4c are arranged sequentially from the inlet to the outlet of the nitrogen gas source pipe 4 to control the flow rate of nitrogen gas entering the oil scraper through the nitrogen gas source pipe 4 and to prevent nitrogen backflow.

[0024] Among them, the solenoid valve 4c is used to control the flow of nitrogen; the pressure sensor 4a is used to monitor the pressure inside the nitrogen source pipe 4 in real time and transmit the pressure data to the subsequent control system to achieve the effect of accurately controlling the nitrogen flow and preventing nitrogen backflow.

[0025] In this invention, preferably, the nitrogen gas source pipe 4 is connected to the external nitrogen scraper housing 1 via a flange connection.

[0026] In this utility model, in a preferred embodiment, a scraper flange joint 5 is fixedly connected to the outer surface of the nitrogen gas source pipe 4 near the outlet; and the scraper flange joint 5 is flange-connected to the scraper flange 6 arranged on the top of the scraper housing 1, so that the scraper housing 1 is connected to the nitrogen gas source pipe 4.

[0027] In this invention, in order to monitor the operating status of the oil scraper in real time, in a preferred embodiment, the oil scraper housing 1 is also equipped with a temperature sensor 7, a vibration sensor 8, and a liquid level sensor 9.

[0028] Among them, vibration sensor 8 can detect abnormalities such as wear of the oil scraper ring and loosening of parts in a timely manner; when the lubricating oil level reaches the preset value (for example, the level may rise due to blockage of the return oil hole), the liquid level sensor 9 controls the nitrogen in the nitrogen gas source pipe 4 to purge and unclog the return oil hole 1a through the solenoid valve 4c; temperature sensor 7 monitors the temperature of lubricating oil and key components so as to adjust the oil scraping strategy according to the effect of temperature on the viscosity of lubricating oil, ensure the stable operation of the oil scraper, and further ensure the stable quality of polysilicon products.

[0029] According to some preferred embodiments, the vibration sensor 8 and the liquid level sensor 9 are disposed on the inner wall of the oil scraper housing 1;

[0030] Furthermore, the vibration sensor 8 is positioned higher than the liquid level sensor 9 and lower than the oil skimmer 3.

[0031] In this invention, to guide the smooth return of lubricating oil, effectively reduce lubricating oil leakage into the upper compartment and cylinder, and further reduce the impact on the quality of polysilicon products, in a preferred embodiment, such as... Figure 3 As shown, the number of return oil guide grooves (1b) matches the number of return oil holes (1a). Each return oil guide groove (1b) is arranged inclined downwards along the inner wall of the scraper housing (1) from top to bottom, and each return oil hole (1a) is respectively arranged at the end of the corresponding return oil guide groove (1b). In some preferred embodiments, the number of return oil guide grooves 1b is not less than 4.

[0032] In this utility model, in a preferred embodiment, the oil scraper housing 1 is disposed inside the oil tank compartment partition 10.

[0033] By adopting the above technical solution, the leakage of lubricating oil along the piston rod 2 into the upper compartment and cylinder can be reduced, thereby reducing the occurrence of accidents that could contaminate the transported medium and ultimately affect the quality of polysilicon products. At the same time, it protects the environment, avoids wasting resources, reduces costs, and also prevents the impact of leaked lubricating oil on the quality of polysilicon products, ensuring the stability of polysilicon product quality.

[0034] The present invention will be described in detail below through embodiments, but the scope of protection of the present invention is not limited thereto.

[0035] Example 1

[0036] A new type of oil scraper for reciprocating compressors, such as Figure 1 , Figure 2 As shown, it includes: a piston rod 2 that penetrates the scraper housing 1, and a scraping device 3 disposed inside the scraper housing 1;

[0037] The oil scraping device 3 includes a primary oil scraping ring 3a, an oil scraping ring group 3b and a throttling ring 3c arranged sequentially around the piston rod 2; and the oil scraper housing 1 is provided with an oil return hole 1a, and an oil return guide groove 1b is provided on the inner wall, and the oil return guide groove 1b is connected to the oil return hole 1a.

[0038] Among them, the top of the scraper housing 1 is connected to a nitrogen gas source pipe 4;

[0039] From the inlet to the outlet of the nitrogen gas source pipe 4, a pressure sensor 4a, a check valve 4b and a solenoid valve 4c are arranged in sequence.

[0040] A scraper flange 5 is fixedly connected to the outer surface of the nitrogen source pipe 4 near the outlet; the scraper flange 5 is flange-connected to the scraper flange 6 located on the top of the scraper housing 1.

[0041] The oil scraper housing 1 is also equipped with a temperature sensor 7, a vibration sensor 8 and a liquid level sensor 9; the vibration sensor 8 and the liquid level sensor 9 are located on the inner wall of the oil scraper housing 1; the vibration sensor 8 is positioned higher than the liquid level sensor 9 and lower than the oil scraping device 3.

[0042] The oil return guide grooves 1b are arranged inclined downward along the inner wall of the oil scraper housing 1 from top to bottom, and there are 4 of them. Each oil return guide groove 1b is equipped with an oil return hole 1a at the end.

[0043] The oil scraper housing 1 is located inside the oil tank compartment partition 10;

[0044] When the new type of oil scraper of the reciprocating compressor is running, the piston rod 2 makes a reciprocating linear motion. The lubricating oil will adhere to its surface and move upward with the movement of the piston rod 2. When the piston rod 2 with lubricating oil enters the oil scraper housing 1, it first passes through the primary oil scraper ring 3a. The primary oil scraper ring 3a scrapes off most of the lubricating oil. The scraped lubricating oil flows along the return oil guide groove 1b to the return oil hole 1a, and then flows back to the crankcase (not shown in the figure).

[0045] After passing through the primary oil scraper ring 3a, a small amount of lubricating oil still adheres to the piston rod 2. At this time, the piston rod 2 continues to move and passes through the oil scraper ring group 3b. The oil scraper ring group 3b further scrapes off the remaining lubricating oil, and this lubricating oil also flows back through the return oil guide groove 1b and the return oil hole 1a.

[0046] Subsequently, the piston rod 2 passes through the throttle ring 3c, which blocks and regulates the residual lubricating oil, allowing it to flow back in an orderly manner. During the entire oil scraping process, if the lubricating oil causes the return oil hole 1a to become blocked due to deterioration or other reasons, when the level sensor 9 detects that the lubricating oil level in the scraper housing 1 has risen to a preset value, the control system issues a command to open the solenoid valve 4c. Nitrogen gas in the nitrogen gas source pipe 4 enters the scraper housing 1 under pressure to purge the return oil hole 1a and other parts, clearing the return oil passage. At the same time, the pressure sensor 4a monitors the nitrogen pressure in real time to ensure that the purging process is stable and safe.

[0047] Vibration sensor 8 continuously monitors the vibration of the oil scraper during operation. When abnormal vibration is detected, it can determine that there may be problems such as wear of the oil scraper ring or loose parts, and promptly feed back to the control system so that operators can check and maintain it, ensuring the normal operation of the oil scraper and the oil scraping effect.

[0048] Therefore, it can be seen that the reciprocating compressor oil scraper according to the present invention can reduce the leakage of lubricating oil along the piston rod 2 into the upper compartment and cylinder, thereby avoiding contamination of the transported medium and accidents that affect the quality of polysilicon products. At the same time, the reciprocating compressor oil scraper according to the present invention also avoids the impact of leaked lubricating oil on the quality of polysilicon products, ensuring the stability of polysilicon product quality.

[0049] The preferred embodiments of this utility model have been described in detail above; however, this utility model is not limited thereto. Within the scope of the technical concept of this utility model, various simple modifications can be made to the technical solution of this utility model, including combining the various technical features in any other suitable manner. These simple modifications and combinations should also be considered as the content disclosed by this utility model and are all within the protection scope of this utility model.

Claims

1. A novel oil scraper for a reciprocating compressor, characterized in that, include: A piston rod (2) that penetrates the scraper housing (1), and a scraping device (3) disposed inside the scraper housing (1). The oil scraping device (3) includes a primary oil scraping ring (3a), an oil scraping ring group (3b) and a throttling ring (3c) arranged sequentially around the piston rod (2), so that the oil on the piston rod (2) can be scraped off sequentially through the primary oil scraping ring (3a), the oil scraping ring group (3b) and the throttling ring (3c). Furthermore, the oil scraper housing (1) is provided with an oil return hole (1a) and an oil return guide groove (1b) is provided on the inner wall. The oil return guide groove (1b) is connected to the oil return hole (1a). The oil scraped by the oil scraper device (3) first flows through the oil return guide groove (1b) and then flows back through the oil return hole (1a).

2. The novel oil scraper for a reciprocating compressor according to claim 1, characterized in that, The top of the scraper housing (1) is connected to a nitrogen gas supply pipe (4), which can be used to unclog the oil return hole (1a) by introducing nitrogen gas.

3. The novel oil scraper for a reciprocating compressor according to claim 2, characterized in that, From the inlet to the outlet of the nitrogen gas source pipe (4), a pressure sensor (4a), a check valve (4b) and a solenoid valve (4c) are arranged in sequence to control the flow rate of nitrogen gas entering the oil scraper through the nitrogen gas source pipe (4) and to prevent nitrogen gas backflow.

4. The novel oil scraper for a reciprocating compressor according to claim 3, characterized in that, The oil scraper housing (1) is connected to the nitrogen gas source pipe (4) via a flange connection.

5. The novel oil scraper for a reciprocating compressor according to claim 4, characterized in that, The outer surface of the nitrogen gas source pipe (4) is fixedly connected to an oil scraper flange joint (5) near the outlet. Furthermore, the oil scraper flange joint (5) is flange-connected to the oil scraper flange (6) located on the top of the oil scraper housing (1), so that the oil scraper housing (1) is connected to the nitrogen gas source pipe (4).

6. The novel oil scraper for a reciprocating compressor according to any one of claims 1-5, characterized in that, The scraper housing (1) is also equipped with a temperature sensor (7), a vibration sensor (8), and a liquid level sensor (9).

7. The novel oil scraper for a reciprocating compressor according to claim 6, characterized in that, The vibration sensor (8) and the liquid level sensor (9) are disposed on the inner wall of the oil scraper housing (1); Furthermore, the vibration sensor (8) is positioned higher than the liquid level sensor (9) and lower than the oil scraper (3).

8. The novel oil scraper for a reciprocating compressor according to any one of claims 1-5, characterized in that, The number of oil return guide grooves (1b) matches the number of oil return holes (1a). Each oil return guide groove (1b) is arranged inclined downward along the inner wall of the scraper housing (1) from top to bottom, and each oil return hole (1a) is respectively arranged at the end of the corresponding oil return guide groove (1b).

9. The novel oil scraper for a reciprocating compressor according to claim 8, characterized in that, The number of the oil return guide channels (1b) is not less than 4.

10. The novel oil scraper for a reciprocating compressor according to any one of claims 1-5, characterized in that, The scraper housing (1) is located inside the oil tank compartment partition (10).

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