Small compressor with oil and gas separation

Abstract

The application relates to a small-sized compressor with oil-gas separation, and relates to the technical field of small-sized compressors, and comprises a compressor main body, an oil-gas separator and a lubricating oil recovery system. The application improves the oil-gas separation efficiency by arranging a cyclone separation device and a spiral flow guide structure. When compressed air enters the separation cavity from the compressed air exhaust port of the compressor main body, the spiral flow guide structure first guides the airflow to preliminarily rotate, so that part of oil droplets are thrown to the cavity wall under the action of centrifugal force; then the airflow flows through the cyclone separation device, the rotating speed is further improved, and the remaining oil droplets are completely separated. Compared with the traditional single centrifugal separation, the double rotation strengthens the separation effect of the oil droplets and the air, solves the problem of low separation efficiency at low rotating speed, and enables the clean air after separation to be stably discharged from the clean air exhaust port; the cyclone separation device is adopted to replace the filter element of the traditional filtering separation, thereby reducing the maintenance cost.

Description

Technical Field

[0001] This application relates to the field of small compressor technology, and in particular to a small compressor with oil-gas separation. Background Technology

[0002] Small compressors, as key equipment providing compressed air power, have extremely wide applications. From the efficient operation of pneumatic tools to the stable operation of small industrial equipment, all rely on the support of small compressors. However, as industrial development trends towards equipment miniaturization and high efficiency, the performance requirements for small compressors are becoming increasingly stringent. In particular, the crucial step of oil-gas separation has become a significant factor restricting the improvement of small compressor performance.

[0003] Currently, the oil-gas separation structures used in most small compressors on the market are relatively simple. For example, centrifugal separation, although simple in structure, has low separation efficiency because the centrifugal force has limited effect at low speeds; filtration separation can achieve a certain separation effect, but the filter element is easily clogged by oil droplets, requiring frequent replacement, which greatly increases maintenance costs; gravity separation, although requiring no additional energy consumption, has a slow separation speed and occupies a large space, which runs counter to the concept of compact design in small compressors.

[0004] In the context of increasingly stringent environmental protection requirements and continuously rising energy costs, developing a highly efficient, low-maintenance, and compact oil-gas separation technology has become a key issue that urgently needs to be addressed in the field of small compressors. To this end, a small compressor with oil-gas separation technology is provided. Utility Model Content

[0005] The purpose of this application is to provide a small compressor with oil-gas separation, which features high efficiency, low maintenance cost and compact structure.

[0006] This application provides a small compressor with oil-gas separation, employing the following technical solution: It includes a compressor body, an oil-gas separator, and a lubricating oil recovery system. The compressor body comprises a cylinder for compressing air, a piston that reciprocates within the cylinder to compress air, and a drive motor that provides power for the piston's movement. The cylinder end of the compressor body has a compressed air exhaust port connected to the inside of the cylinder for discharging compressed air. The oil-gas separator includes a separation chamber with an inlet end and an outlet end, and a cyclone separator for rotating the airflow to achieve oil-gas separation. The inlet of the separation chamber... The compressor body is sealed to the compressed air exhaust port. The cyclone separator is fixed inside the separation chamber and located between the inlet and outlet ends of the separation chamber, with its position corresponding to the downstream of the inlet end of the separation chamber. The bottom of the separation chamber is provided with an oil outlet that communicates with the inside of the separation chamber, and the upper end of the separation chamber is provided with a clean air exhaust port that communicates with the inside of the exhaust end of the separation chamber. The lubricating oil recovery system includes a recovery pipeline and an oil storage tank for storing recovered lubricating oil. An oil inlet is provided on the left side of the oil storage tank. One end of the recovery pipeline is connected to the oil outlet at the bottom of the separation chamber, and the other end is connected to the oil inlet of the oil storage tank.

[0007] By adopting the above technical solution, a complete oil-gas separation and recovery system is formed by integrating the compressor body, oil-gas separator, and lubricating oil recovery system. Compressed air generated by the compressor body enters the separation chamber through the compressed air exhaust port. Oil-gas separation is achieved under the action of the cyclone separator. The separated lubricating oil is recovered through the oil outlet and recovery pipeline into the oil storage tank, while clean air is discharged from the clean air exhaust port. The overall structure achieves efficient oil-gas separation and recovery, meeting the basic functional requirements of a small compressor.

[0008] Preferably, the cyclone separator is made of stainless steel.

[0009] By adopting the above technical solution, the cyclone separator is made of stainless steel, which gives it good corrosion resistance and wear resistance. It can work stably for a long time in an oily gas environment, extending the service life of the cyclone separator, reducing the replacement frequency, and lowering maintenance costs.

[0010] Preferably, an air filter is provided at the air inlet of the compressor body.

[0011] By adopting the above technical solution, the air filter device at the air inlet of the compressor body can filter the incoming air, remove impurities from the air, prevent impurities from entering the cylinder and causing wear to the piston, cylinder and other components, protect the core components of the compressor body, extend the overall service life of the compressor body, and also reduce the impact of impurities on the subsequent oil-gas separation process.

[0012] Preferably, the separation chamber is provided with a spiral flow guiding structure.

[0013] By adopting the above technical solution, the spiral guide structure inside the separation chamber can guide the incoming airflow to rotate initially, causing some oil droplets to separate in advance under the action of centrifugal force, which enhances the synergistic separation effect with the cyclone separator, improves the overall oil-gas separation efficiency, and makes the air discharged from the clean gas exhaust port cleaner.

[0014] Preferably, the separation chamber is made of aluminum alloy.

[0015] By adopting the above technical solution, the separation chamber is made of aluminum alloy, which not only ensures that the separation chamber has sufficient structural strength to withstand the internal air pressure, but also reduces the weight of the separation chamber, which meets the design requirements of lightweight small compressors. At the same time, aluminum alloy has a certain degree of corrosion resistance and can adapt to the oil-containing environment inside the separation chamber.

[0016] Preferably, the recycling pipeline is made of corrosion-resistant plastic.

[0017] By adopting the above technical solution, the recovery pipeline is made of corrosion-resistant plastic material, which can effectively resist corrosive substances that may be contained in the recovered lubricating oil, prevent the recovery pipeline from being corroded and damaged, ensure the smooth flow of the lubricating oil recovery path, and ensure that the lubricating oil can smoothly enter the oil storage tank.

[0018] Preferably, the oil storage tank is made of high-strength steel plate.

[0019] By adopting the above technical solution, the oil storage tank is made of high-strength steel plate, which gives it high structural strength and sealing performance. It can safely store the recovered lubricating oil, prevent lubricating oil leakage, and withstand a certain amount of external pressure and impact, thus ensuring the stable use of the oil storage tank.

[0020] Preferably, the cyclone separator can be replaced by a multi-stage centrifugal separator to meet different separation efficiency requirements.

[0021] By adopting the above technical solution, the cyclone separator can be replaced with a multi-stage centrifugal separator, which allows the small compressor to be flexibly adjusted according to different usage scenarios and requirements for separation efficiency. When higher separation efficiency is required, it can be replaced with a multi-stage centrifugal separator, thus enhancing the adaptability and versatility of the equipment.

[0022] In summary, this application includes at least one of the following beneficial technical effects:

[0023] This small compressor with oil-gas separation technology improves oil-gas separation efficiency by incorporating a cyclone separator and a spiral guide structure. When compressed air enters the separation chamber from the compressor's exhaust port, the spiral guide structure first guides the airflow to rotate initially, causing some oil droplets to be thrown against the chamber wall under centrifugal force. Subsequently, the airflow passes through the cyclone separator, further increasing the rotation speed, and the remaining oil droplets are completely separated. Compared to traditional single centrifugal separation, the dual rotation action enhances the separation effect between oil droplets and air, solving the problem of low separation efficiency at low speeds, and ensuring that the separated clean air can be stably discharged from the clean air exhaust port. By using a cyclone separator to replace the filter element of traditional filtration separation, maintenance costs are reduced: the cyclone separator achieves separation through a mechanical structure, eliminating the need for easily worn filter elements. During operation, oil droplets only accumulate on the cavity wall and are discharged through the oil outlet, without clogging the separation components. Furthermore, its stainless steel construction ensures high wear resistance and a long service life, reducing downtime and costs associated with component replacement and overcoming the drawbacks of frequent filter replacements required in filtration-based separation systems. Through optimized overall structural layout, a compact design is achieved. The compressed air exhaust port of the compressor body is directly and sealed to the air inlet of the separation chamber. The oil-gas separator and lubricating oil recovery system are tightly connected via a recovery pipeline, and the oil inlet of the oil storage tank is precisely aligned with the recovery pipeline. No additional redundant space is required for any component. Compared to the bulky size of gravity-based separation systems, this design makes full use of space, meeting the compact requirements of small compressors and making it suitable for space-constrained industrial environments. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of this application;

[0025] Figure 2 This is a schematic diagram of the internal structure of the oil-gas separator in this application;

[0026] Figure 3 This is a schematic diagram showing a partial cross-section of the separation cavity in this application;

[0027] Figure 4 This is a schematic diagram of the oil-gas separator of this application;

[0028] Figure 5 This is a schematic diagram of the lubricating oil recovery system of this application.

[0029] In the picture:

[0030] 1. Compressor body; 101. Compressed air exhaust port; 2. Oil-gas separator; 201. Separation chamber; 2011. Oil outlet; 2012. Clean air exhaust port; 202. Cyclone separator; 3. Spiral guide structure; 4. Lubricating oil recovery system; 401. Recovery pipeline; 402. Oil storage tank; 4021. Oil inlet; 5. Air filter device. Detailed Implementation

[0031] The following is in conjunction with the appendix Figure 1 - Appendix Figure 5 This application will be described in further detail below.

[0032] Example 1: A small compressor with oil-gas separation, referring to... Figure 1 , Figure 2 and Figure 3 The system includes a compressor body 1, an oil-gas separator 2, and a lubricating oil recovery system 4. The compressor body 1 consists of a cylinder for compressing air, a piston that reciprocates within the cylinder to compress air, and a drive motor that provides power for the piston's movement. The cylinder end of the compressor body 1 has a compressed air exhaust port 101 connected to the inside of the cylinder for discharging compressed air. The oil-gas separator 2 includes a separation chamber 201 with an inlet end and an outlet end, and a cyclone separator 202 for rotating the airflow to separate oil and gas. The inlet end of the separation chamber 201 is sealed to the compressed air exhaust port 101 of the compressor body 1. The cyclone separator 202 is fixed inside the separation chamber 201 and located between the inlet end of the separation chamber 201 and the outlet end of the compressor body 1. Between the exhaust ends, its position corresponds to the downstream of the air inlet end of the separation chamber 201. The bottom of the separation chamber 201 is provided with an oil outlet 2011 that communicates with the inside of the separation chamber 201. The upper end of the separation chamber 201 is provided with a clean air exhaust outlet 2012 that communicates with the inside of the exhaust end of the separation chamber 201. The lubricating oil recovery system 4 includes a recovery pipe 401 and an oil storage tank 402 for storing recovered lubricating oil. An oil inlet 4021 is provided on the left side of the oil storage tank 402. One end of the recovery pipe 401 is connected to the oil outlet 2011 at the bottom of the separation chamber 201, and the other end is connected to the oil inlet 4021 of the oil storage tank 402. By integrating the compressor body 1, the oil-gas separator 2 and the lubricating oil recovery system 4, a complete oil-gas separation and recovery system is formed. The compressed air generated by the compressor body 1 enters the separation chamber 201 through the compressed air exhaust port 101. Under the action of the cyclone separator 202, oil and gas separation is achieved. The separated lubricating oil enters the oil storage tank 402 for recovery through the oil outlet 2011 and the recovery pipe 401. Clean air is discharged from the clean air exhaust port 2012. The overall structure achieves efficient oil and gas separation and recovery, meeting the basic functional requirements of a small compressor.

[0033] Reference Figure 1 , Figure 2 and Figure 4The cyclone separator 202 is made of stainless steel, and an air filter 5 is installed at the air inlet of the compressor body 1. The stainless steel material of the cyclone separator 202 gives it good corrosion resistance and wear resistance, enabling it to work stably for a long time in an oily gas environment, extending the service life of the cyclone separator 202, reducing the replacement frequency, and lowering maintenance costs. The air filter 5 at the air inlet of the compressor body 1 can filter the incoming air, remove impurities from the air, and prevent impurities from entering the cylinder and causing wear to the piston, cylinder, and other components, thus protecting the core components of the compressor body 1, extending the overall service life of the compressor body 1, and also reducing the impact of impurities on the subsequent oil-gas separation process.

[0034] Reference Figure 1 , Figure 2 and Figure 4 The separation chamber 201 is equipped with a spiral guide structure 3. The separation chamber 201 is made of aluminum alloy. The spiral guide structure 3 inside the separation chamber 201 can guide the incoming airflow to rotate initially, so that some oil droplets are separated in advance under the action of centrifugal force, which enhances the synergistic separation effect with the cyclone separator 202, improves the overall oil-gas separation efficiency, and makes the air discharged from the clean air exhaust port 2012 cleaner. The separation chamber 201 is made of aluminum alloy, which not only ensures that the separation chamber 201 has sufficient structural strength to withstand the internal air pressure, but also reduces the weight of the separation chamber 201, which meets the design requirements of lightweight small compressors. At the same time, the aluminum alloy material has a certain degree of corrosion resistance and can adapt to the oil-containing environment inside the separation chamber 201.

[0035] Reference Figure 1 , Figure 2 and Figure 5 The recovery pipe 401 is made of corrosion-resistant plastic, and the oil storage tank 402 is made of high-strength steel plate. The cyclone separator 202 can be replaced with a multi-stage centrifugal separator to adapt to different separation efficiency requirements. The corrosion-resistant plastic material of the recovery pipe 401 can effectively resist corrosive substances that may be contained in the recovered lubricating oil, preventing the recovery pipe 401 from being corroded and damaged, ensuring the smooth flow of the lubricating oil recovery path, and ensuring that the lubricating oil can smoothly enter the oil storage tank 402. The oil storage tank 402 is made of high-strength steel plate, which gives it high structural strength and sealing performance, can safely store the recovered lubricating oil, prevent lubricating oil leakage, and can also withstand a certain amount of external pressure and impact, ensuring the stable use of the oil storage tank 402. The cyclone separator 202 can be replaced with a multi-stage centrifugal separator, allowing the small compressor to be flexibly adjusted according to different usage scenarios and separation efficiency requirements. When higher separation efficiency is required, it can be replaced with a multi-stage centrifugal separator, enhancing the adaptability and versatility of the equipment.

[0036] In this embodiment, by setting up a cyclone separator 202 and a spiral guide structure 3, the oil-gas separation efficiency is improved. When compressed air enters the separation chamber 201 from the compressed air exhaust port 101 of the compressor body 1, the spiral guide structure 3 first guides the airflow to rotate initially, causing some oil droplets to be thrown towards the chamber wall under centrifugal force. Subsequently, the airflow flows through the cyclone separator 202, and the rotation speed is further increased, so that the remaining oil droplets are completely separated. Compared with the traditional single centrifugal separation, the dual rotation action enhances the separation effect of oil droplets and air, solves the problem of low separation efficiency at low speed, and enables the separated clean air to be stably discharged from the clean air exhaust port 2012. By using the cyclone separator 202 to replace the filter element of the traditional filtration separation, the maintenance cost is reduced: the cyclone separator 202 achieves separation through a mechanical structure, without relying on easily worn filter elements. During operation, oil droplets only accumulate on the cavity wall and are discharged through the oil outlet 2011, without clogging the separation components. Furthermore, its stainless steel construction ensures high wear resistance and a long service life, reducing downtime and costs associated with component replacement and overcoming the drawbacks of frequent filter replacements required in filtration-based separation systems. Through optimized overall structural layout, a compact design is achieved. The compressed air exhaust port 101 of the compressor body 1 is directly and sealed to the air inlet of the separation chamber 201. The oil-gas separator 2 and the lubricating oil recovery system 4 are tightly connected via the recovery pipe 401. The oil inlet 4021 of the oil storage tank 402 is precisely connected to the recovery pipe 401. No additional redundant space is required for any component. Compared to the bulky size of gravity-based separation systems, this design makes full use of space, meeting the compact requirements of small compressors and making it suitable for space-constrained industrial environments.

[0037] The implementation principle of this application embodiment is as follows: external air first passes through the air filter device 5 at the air inlet of the compressor body 1 to filter out impurities in the air before entering the cylinder of the compressor body 1; the drive motor of the compressor body 1 starts, driving the piston to reciprocate in the cylinder, compressing the air entering the cylinder, making the air high-pressure compressed air; the compressed air carries a small amount of lubricating oil mist and is discharged from the compressed air exhaust port 101 at the end of the cylinder of the compressor body 1, and then enters the air inlet of the separation chamber 201 in the oil-gas separator 2; after the compressed air enters the separation chamber 201, it first encounters the internal spiral guide structure 3, under its guidance, the airflow begins to rotate initially, and some oil droplets are thrown towards the inner wall of the separation chamber 201 due to centrifugal force; the initially rotating airflow continues to flow into the separation chamber 201 and reaches the cyclone separator 202. Since the cyclone separator 202 is fixed inside the separation chamber 201 and located between the inlet and outlet ends, the rotation speed is further accelerated when the airflow passes through this point. The remaining oil droplets are completely thrown towards the inner wall of the separation chamber 201 under the action of stronger centrifugal force. The oil droplets thrown towards the inner wall of the separation chamber 201 gradually gather and flow downward along the inner wall under the action of gravity. Finally, they enter the recovery pipe 401 of the lubricating oil recovery system 4 through the oil outlet 2011 at the bottom of the separation chamber 201, and flow into the oil inlet 4021 on the left side of the oil storage tank 402 and are stored in the oil storage tank 402. After oil-gas separation, the clean compressed air with most of the lubricating oil removed is discharged from the clean air exhaust port 2012, which is connected to the interior of the exhaust end of the separation chamber 201. When different separation efficiencies are required, the cyclone separator 202 can be replaced with a multi-stage centrifugal separator to meet the requirements of compressed air quality under different working conditions.

[0038] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be included within the scope of protection of this application.

Claims

1. A small compressor with oil-gas separation, comprising a compressor body (1), an oil-gas separator (2), and a lubricating oil recovery system (4); the compressor body (1) consists of a cylinder for compressing air, a piston that reciprocates within the cylinder to achieve air compression, and a drive motor that provides power for the piston's movement, characterized in that: The compressor body (1) has a compressed air exhaust port (101) at the cylinder end that is connected to the inside of the cylinder and is used to discharge compressed air; the oil-gas separator (2) includes a separation chamber (201) with an inlet end and an exhaust end, and a cyclone separator (202) for rotating the airflow to achieve oil-gas separation. The inlet end of the separation chamber (201) is sealed to the compressed air exhaust port (101) of the compressor body (1). The cyclone separator (202) is fixed inside the separation chamber (201) and located between the inlet end and the exhaust end of the separation chamber (201), with its position corresponding to the downstream of the inlet end of the separation chamber (201). The bottom of the separation chamber (201) is provided with an oil outlet (2011) that communicates with the interior of the separation chamber (201), and the upper end of the separation chamber (201) is provided with a clean air exhaust port (2012) that communicates with the interior of the exhaust end of the separation chamber (201); the lubricating oil recovery system (4) includes a recovery pipe (401) and an oil storage tank (402) for storing recovered lubricating oil. The left side of the oil storage tank (402) is provided with an oil inlet (4021). One end of the recovery pipe (401) is connected to the oil outlet (2011) at the bottom of the separation chamber (201), and the other end is connected to the oil inlet (4021) of the oil storage tank (402).

2. A small compressor with oil-gas separation according to claim 1, characterized in that: The cyclone separator (202) is made of stainless steel.

3. A small compressor with oil-gas separation according to claim 1, characterized in that: An air filter device (5) is provided at the air inlet of the compressor body (1).

4. A small compressor with oil-gas separation according to claim 1, characterized in that: The separation chamber (201) is equipped with a spiral flow guiding structure (3).

5. A small compressor with oil-gas separation according to claim 1, characterized in that: The separation chamber (201) is made of aluminum alloy.

6. A small compressor with oil-gas separation according to claim 1, characterized in that: The recycling pipe (401) is made of corrosion-resistant plastic.

7. A small compressor with oil-gas separation according to claim 1, characterized in that: The oil storage tank (402) is made of high-strength steel plate.

8. A small compressor with oil-gas separation according to claim 1, characterized in that: The cyclone separator (202) can be replaced by a multi-stage centrifugal separator to meet different separation efficiency requirements.

Images