A compressor oil injection structure and compressor oil injection method

Abstract

This invention provides a compressor oil injection structure and method, belonging to the field of compressor manufacturing technology. The oil injection structure includes a gun body with an oil injection needle inside. The oil injection needle can move along its own axis within the gun body, and one end of the needle has an oil outlet. The gun body has a vacuum port and an oil injection port, with the vacuum port connected to a vacuuming device. When the oil injection needle moves, it can connect the oil outlet to the vacuum port or the oil injection port. This structure allows oil to be injected into the compressor after vacuuming, thereby improving the compressor's oil injection efficiency, avoiding oil spraying during the injection process, and providing a strong guarantee for the compressor's efficient production and stable operation.

Description

Technical Field

[0001] This invention relates to the field of compressor manufacturing technology, and in particular to a compressor oil injection structure and a compressor oil injection method. Background Technology

[0002] Lubrication is a crucial step in compressor maintenance. Lubricating oil plays a vital role inside the compressor. For example, it reduces friction and wear on components such as bearings, gears, and pistons; it helps absorb and carry away heat generated inside the compressor, transferring it to the outside through the oil cooling system, thereby lowering the compressor's operating temperature and preventing overheating; in some compressors, lubricating oil can also form a sealing layer between the piston and cylinder, reducing gas leakage and improving compression efficiency. Currently, compressor lubrication typically involves directly injecting oil into the compressor's oil inlet using an oil gun. However, this method presents several technical challenges for compressors with narrow inlet ports. First, due to the complexity of the compressor's internal structure, especially in compressors with small direct clearance between the motor rotor and the compressor rotor, the oil inlet is often quite narrow. This severely affects the speed of venting and oil injection, making the entire lubrication process extremely slow. Second, when the injection speed is too fast, the lubricating oil entering the fully enclosed compressor cannot smoothly enter the compressor due to the inability of the compressor's gas to be immediately expelled, and the presence of a certain gas pressure inside the compressor, often resulting in oil spraying. This not only wastes valuable oil resources, but may also damage the compressor and even cause safety accidents.

[0003] Therefore, it is necessary to improve the existing oil filling method of compressors to overcome the shortcomings of the existing technology. Summary of the Invention

[0004] To overcome the problems existing in related technologies, one of the objectives of this invention is to provide a compressor oil injection structure that can inject oil into the compressor after vacuuming, thereby improving the oil injection efficiency of the compressor, avoiding oil spraying during the oil injection process, and providing a strong guarantee for the efficient production and stable operation of the compressor.

[0005] A compressor oil filling structure includes:

[0006] The gun body has an oil injection needle installed inside it. The oil injection needle can move along its own axis inside the gun body, and one end of the oil injection needle has an oil outlet.

[0007] The gun body is provided with a vacuum port and an oil injection port, and the vacuum port is connected to a vacuum pumping device.

[0008] When the injection needle moves, it can connect the oil outlet with the vacuum port or the oil injection port.

[0009] The working principle of this oil injection structure is as follows: Before oil injection, the oil outlet of the oil injection needle is tightly connected to the oil inlet of the compressor. The vacuum equipment is activated, and a vacuum is created inside the compressor through the vacuum port until a negative pressure is formed within the compressor cavity. After vacuuming is complete, the oil injection needle is moved via the control mechanism to connect the oil injection port and the oil outlet. The oil injection system is then activated, and lubricating oil enters the oil outlet through the oil injection port and is then injected into the compressor through the oil outlet. During the oil injection process, due to the low internal pressure of the compressor, the lubricating oil can enter smoothly without any oil spraying.

[0010] This oil injection structure, through continuous vacuuming and oil injection, ensures that the internal pressure of the compressor cavity does not become excessively high, and that lubricating oil does not spray out during injection, thus guaranteeing a smooth oil injection process and reducing lubricating oil waste. The vacuuming process effectively removes air and impurities from inside the compressor, ensuring the purity of the lubricating oil and the quality of the oil injection.

[0011] In a preferred embodiment of the present invention, the gun body is provided with a mounting cavity, and the oil injection needle is disposed in the mounting cavity; a connecting sleeve is provided at one end of the gun body, and the oil outlet of the oil injection needle extends out from the connecting sleeve;

[0012] A spring is provided inside the mounting cavity. The spring is sleeved around the oil injection needle, with one end of the spring held in the mounting cavity and the other end fixedly connected to the oil injection needle.

[0013] When the oil outlet is subjected to pressure, the oil injection needle can compress the spring and move along its own axis.

[0014] It should be noted that the pressure on the oil outlet includes at least one component of force along the axis of the injection needle.

[0015] In practical use, the connecting sleeve is used to connect to the compressor's oil inlet. When the connecting sleeve is tightly fitted onto the compressor's oil inlet, a seal is formed between the connecting sleeve and the compressor's oil inlet. At this time, by driving the gun body downwards, the compressor's oil inlet squeezes the oil injection needle's outlet, causing the oil injection needle to rise, thus connecting the vacuum port and the oil outlet, allowing for vacuuming of the compressor. After vacuuming is complete, the pressure on the gun body is released. At this time, the oil injection needle returns to its original position under the action of the spring, sealing the oil injection needle with the vacuum port, while the oil injection port and the oil outlet remain connected, allowing for oil injection of the compressor. By driving the gun body downwards and releasing the pressure to reset, automatic switching between oil injection and vacuuming is achieved, improving the automation level of the oil injection process.

[0016] In a preferred embodiment of the present invention, the mounting cavity includes a first cavity and a second cavity that are interconnected, wherein the second cavity is coaxially disposed with the first cavity;

[0017] The injection needle includes a first needle body and a second needle body that are interconnected. The first needle body is disposed in the first cavity, the second needle body is disposed in the second cavity, and the spring is disposed in the second cavity and located on the periphery of the second needle body.

[0018] A limiting bearing is provided in the first cavity, and a limiting ring is provided at the junction of the first needle body and the second needle body. The limiting ring is disposed opposite to the limiting bearing, and the limiting bearing is used to restrict the movement of the limiting ring.

[0019] In a preferred embodiment of the present invention, the vacuum port is disposed on the side wall of the first cavity, and the first needle body is provided with a first through hole corresponding to the vacuum port.

[0020] In this embodiment, the scheme is further optimized. Through detailed structural design of the injection needle and the mounting cavity, the injection needle can move and reset more stably under force, improving the stability of the injection process. The inclusion of a limiting bearing restricts the movement of the needle body when it engages with the limiting ring. This design prevents the injection needle from detaching from the mounting cavity during movement, ensuring the safety of the injection process.

[0021] In a preferred embodiment of the present invention, the gun body further includes a connecting seat, the connecting seat being connected to the first cavity, the oil inlet being disposed on the connecting seat, and the oil inlet communicating with the first needle body;

[0022] The connecting seat is equipped with a solenoid valve, which is used to control the connection and disconnection between the oil inlet and the first needle body.

[0023] In this embodiment, a solenoid valve is used to control the oil injection port. When oil injection is required, an external control system sends a signal to the solenoid valve, which opens, connecting the oil injection port to the first needle body. Lubricating oil enters the second needle body through the injection port and then flows into the compressor through the outlet. After oil injection is complete, the external control system sends a shutdown signal to the solenoid valve, which closes, disconnecting the oil injection port from the first needle body and stopping the injection process. The solenoid valve design enables remote control of the oil injection process, improving its controllability and accuracy. The on / off control of the solenoid valve effectively prevents lubricating oil leakage and waste, while also avoiding safety accidents caused by misoperation. The connection between the solenoid valve and the external control system makes the oil injection process more automated and intelligent, reducing manual intervention and labor intensity.

[0024] In a preferred embodiment of the present invention, the connecting seat is provided with an air outlet, and the air outlet is connected to the first needle body.

[0025] Blowing air into the injection needle through the air inlet removes any remaining lubricating oil after injection, ensuring the target injection volume is achieved. The air blowing process is as follows: After injection, close the solenoid valve and disconnect the injection port from the first needle body. Next, blow gas (such as compressed air or nitrogen) into the injection needle through the air inlet. The gas carries the remaining lubricating oil into the compressor, ensuring the target injection volume is reached. After the air blowing process is complete, close the air inlet to finish the injection operation.

[0026] In a preferred embodiment of the present invention, the connecting sleeve is provided with a first sealing ring and a second sealing ring. Both the first sealing ring and the second sealing ring are sleeved around the oil injection needle, and the second sealing ring is located close to the oil outlet, while the first sealing ring is located on the side of the second sealing ring away from the oil outlet.

[0027] The inner diameter of the second sealing ring is larger than the inner diameter of the first sealing ring.

[0028] This embodiment incorporates a first and a second sealing ring in the connecting sleeve. This improvement enhances the sealing performance during the oil injection process, ensuring no lubricating oil leakage and maintaining a tight connection between the compressor's oil inlet and the oil outlet of the injection needle. The double sealing ring design significantly improves the sealing performance between the connecting sleeve and the compressor's oil inlet, effectively preventing lubricating oil leakage.

[0029] In a preferred embodiment of the present invention, a connecting structure is further included, the connecting structure including a connecting flange and a connecting column, the connecting flange being disposed on one side of the gun body, a mounting base plate being disposed on the gun body, and the connecting flange being fixedly connected to the mounting base plate via the connecting column;

[0030] The connecting flange is provided with a connecting hole.

[0031] In a preferred embodiment of the present invention, the connection structure further includes a connection plate, the connection flange is fixed in the connection plate, and multiple connection columns are provided, all of which are fixedly connected to the connection plate.

[0032] The connecting plate is also provided with a locking structure, which is located at one end of the connecting hole and extends into the connecting hole.

[0033] This embodiment provides a connection method between the oil injection structure and an external drive device to ensure a reliable connection between the gun body and the external drive device (such as a robot). The combined design of the connecting flange, connecting column, and connecting plate significantly improves the stability of the connection between the gun body and the external device, such as the robot. Furthermore, the locking structure in the connection structure ensures a tight connection between the robot and the connection structure, preventing oil injection failure due to loosening during the oil injection process.

[0034] The second objective of this invention is to provide a compressor oil injection method, which is implemented using the compressor oil injection structure described above;

[0035] The method includes the following steps:

[0036] Obtain the vacuum level inside the compressor;

[0037] When the vacuum level inside the compressor exceeds the set threshold, the oil injection needle is moved to connect the oil outlet with the vacuum port, and the vacuum equipment is started to perform vacuuming operation on the compressor.

[0038] When the vacuum level inside the compressor is lower than the set threshold, vacuuming stops.

[0039] The movement of the oil injection needle is controlled to connect the oil outlet and the oil injection port, thereby injecting oil into the compressor.

[0040] This method improves the accuracy and efficiency of oil injection by monitoring the vacuum level inside the compressor in real time and automatically controlling the vacuuming and oil injection processes based on the vacuum level. Furthermore, it ensures that the compressor reaches a sufficient vacuum level before oil injection, which helps improve oil injection efficiency and prevents oil spraying during injection due to excessively high internal compressor pressure.

[0041] The beneficial effects of this invention are as follows:

[0042] This invention provides a compressor oil injection structure, which includes a gun body with an oil injection needle inside. The oil injection needle can move along its own axis within the gun body, and one end of the needle has an oil outlet. The gun body has a vacuum port and an oil injection port, with the vacuum port connected to a vacuum pump. When the oil injection needle moves, it can connect the oil outlet to the vacuum port or the oil injection port. During use, the oil outlet connects to the compressor's oil inlet. When the vacuum port connects to the oil outlet, the vacuum pump can perform a vacuuming operation inside the compressor, creating a negative pressure state within the compressor cavity. After vacuuming, the internal pressure of the compressor cavity decreases. At this point, the oil injection needle moves, connecting the oil injection port to the oil outlet, allowing lubricating oil to be injected into the compressor. Furthermore, due to the low internal pressure of the compressor cavity, the lubricating oil can smoothly enter the compressor cavity during the injection process, preventing oil spraying and ensuring the stability and safety of the injection process, effectively improving the compressor's oil injection efficiency.

[0043] This application also provides an oil injection method for a compressor based on the aforementioned oil injection structure. The method includes: acquiring the vacuum level inside the compressor; when the vacuum level inside the compressor exceeds a set threshold, controlling the movement of the oil injection needle to connect the oil outlet with the vacuum port, and starting a vacuum pump to perform a vacuuming operation on the compressor; when the vacuum level inside the compressor is less than the set threshold, stopping the vacuuming; and controlling the movement of the oil injection needle to connect the oil outlet with the oil injection port to inject oil into the compressor. This method automatically acquires the vacuum level inside the compressor and automatically controls the movement of the oil injection needle and the start / stop of the vacuum pump according to a preset threshold, achieving automation and intelligence in the oil injection process, reducing the complexity and error rate of manual operation. Furthermore, oil injection under negative pressure reduces the risk of oil spraying due to unstable air pressure, effectively avoiding problems such as air bubbles or uneven mixing of lubricating oil during injection due to air pressure issues, thereby improving the quality of oil injection. Attached Figure Description

[0044] Figure 1 This is a schematic diagram of the compressor oil injection structure provided in an embodiment of the present invention;

[0045] Figure 2 This is an exploded view of the compressor oil injection structure provided in an embodiment of the present invention;

[0046] Figure 3 This is a schematic diagram of the structure of the gun body and the oil inlet of the compressor provided in an embodiment of the present invention;

[0047] Figure 4 This is a schematic diagram of the mounting cavity of the gun body provided in an embodiment of the present invention;

[0048] Figure 5This is a schematic diagram of the structure of the oil injection needle provided in an embodiment of the present invention;

[0049] Figure 6 This is a flowchart of a compressor oil injection method provided in an embodiment of the present invention.

[0050] Figure label:

[0051] 1. Gun body; 11. Oil inlet; 12. Connecting seat; 13. Air inlet; 14. Vacuum inlet; 15. Oil needle; 151. Oil outlet; 152. First needle body; 153. Limiting ring; 154. Second needle body; 16. Mounting cavity; 161. First cavity; 162. Second cavity; 17. Limiting bearing; 2. Spring; 3. Solenoid valve; 4. Connecting structure; 41. Connecting column; 42. Connecting plate; 421. Locking structure; 43. Connecting flange; 431. Connecting hole; 5. Connecting sleeve; 51. First sealing ring; 52. Second sealing ring; 6. Mounting base plate; 100. Compressor; 101. Oil inlet. Detailed Implementation

[0052] Preferred embodiments of the invention will now be described in more detail with reference to the accompanying drawings. While preferred embodiments of the invention are shown in the drawings, it should be understood that the invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the invention will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

[0053] Currently, the common method for filling compressors with oil is to directly inject oil into the compressor's oil inlet using an oil gun. However, this method presents several technical challenges for compressors with narrow oil inlets. First, due to the complexity of the compressor's internal structure, especially in compressors with small rotor-to-rotor clearances, the oil inlet is often quite narrow. This severely affects the speed of venting and oil injection, making the entire oil injection process extremely slow. Second, when the oil injection speed is too fast, the lubricating oil entering the fully enclosed compressor often cannot smoothly enter the compressor due to the inability of the gas to be immediately expelled. This can easily lead to oil spraying. This not only wastes valuable oil resources but may also damage the compressor and even cause safety accidents.

[0054] Based on this, this application provides a compressor oil injection structure.

[0055] Example 1

[0056] like Figures 1-5 As shown, this embodiment provides a compressor oil injection structure, including:

[0057] The gun body 1 contains an oil injection needle 15, which is movable along its own axis within the gun body 1. One end of the oil injection needle 15 has an oil outlet 151. Specifically, the oil injection needle 15 is made of stainless steel with a smooth surface to reduce friction during movement.

[0058] The gun body 1 is provided with a vacuum port 14 and an oil inlet 11. The vacuum port 14 is connected to a vacuum pumping device. The vacuum port 14 is located on the gun body 1 and is connected to the vacuum pumping device through a pipe. The vacuum port 14 is designed with a quick connector for easy connection and disconnection with the vacuum pumping device.

[0059] When the oil injection needle 15 moves, the oil outlet 151 can be connected to the vacuum port 14 or the oil injection port 11.

[0060] The working principle of this oil injection structure is as follows: Before oil injection, the oil outlet 151 of the oil injection needle 15 is tightly connected to the oil inlet 101 of the compressor 100 to ensure no leakage during operation. The oil injection needle 15 is moved so that the oil outlet 151 connects with the vacuum port 14, at which point the vacuum equipment is connected to the compressor cavity. The vacuum equipment is started, and a vacuum is created inside the compressor through the vacuum port 14 until a negative pressure is formed inside the compressor cavity. After vacuuming is completed, the oil injection needle 15 is moved by the control mechanism so that the oil injection port 11 connects with the oil outlet 151. The oil injection system is turned on, and lubricating oil enters the oil outlet 151 through the oil injection port 11, and then is injected into the compressor cavity through the oil outlet 151. During the oil injection process, due to the low internal pressure of the compressor, the lubricating oil can enter smoothly without any oil spraying.

[0061] This oil injection structure, through continuous vacuuming and oil injection, ensures that the internal pressure of the compressor cavity does not become excessively high, preventing lubricating oil from spraying out during injection. This guarantees a smooth, stable, and safe oil injection process, effectively improving the compressor's oil injection efficiency and reducing lubricating oil waste. The vacuuming process also effectively removes air and impurities from inside the compressor, ensuring the purity and quality of the lubricating oil.

[0062] In this embodiment, the movement of the oil injection needle 15 can be achieved through manual or automatic control. Manual control can be achieved through an operating lever, while automatic control is achieved through an actuator such as a servo motor. The start and stop of the vacuum equipment and the oil injection system can be centrally controlled through a control panel, facilitating operation by the operator.

[0063] Example 2

[0064] like Figures 1-5 As shown, this embodiment is an improvement on embodiment 1.

[0065] In this embodiment, the structure of the gun body 1 is refined.

[0066] The gun body 1 is provided with a mounting cavity 16, and the oil injection needle 15 is disposed in the mounting cavity 16; a connecting sleeve 5 is provided at one end of the gun body 1, and the oil outlet 151 of the oil injection needle 15 extends out from the connecting sleeve 5.

[0067] A spring 2 is provided inside the mounting cavity 16. The spring 2 is sleeved around the oil injection needle 15, with one end of the spring 2 held inside the mounting cavity 16 and the other end fixedly connected to the oil injection needle 15.

[0068] When the oil outlet 151 is subjected to pressure, the oil injection needle 15 can compress the spring 2, causing it to move along its own axis. The selection of the spring 2 needs to consider parameters such as its elastic modulus and fatigue strength to ensure stable performance during long-term use.

[0069] Specifically, in this embodiment, a connecting sleeve 5 is provided at one end of the gun body 1. The connecting sleeve 5 is tightly connected to the gun body 1, and a guide hole can be provided inside to guide the movement of the oil injection needle 15 to change the communication state of the oil outlet 151. One end of the connecting sleeve 5 can be designed with threads or a quick connector to facilitate a tight connection with the oil inlet 101 of the compressor 100. The pressure of the oil outlet 151 can be controlled by moving the gun body 1 so that the oil outlet 151 abuts against the oil inlet of the compressor. Therefore, the oil inlet of the compressor will apply a reaction force to the oil outlet 151, causing the needle to move and achieve the state of communication between the oil outlet 151 and the vacuum port 14. When the oil inlet 101 of the compressor 100 does not apply a reaction force to the oil outlet 151, the oil injection needle 15 is reset under the action of the spring 2, restoring the communication state between the oil outlet 151 and the oil injection port 11.

[0070] In actual use, the connecting sleeve 5 is used to connect with the oil inlet 101 of the compressor 100. When the connecting sleeve 5 is tightly fitted onto the oil inlet of the compressor, the connecting sleeve 5 and the oil inlet of the compressor are sealed to each other. At this time, by driving the gun body 1 downward, the oil inlet of the compressor squeezes the oil outlet 151 of the oil injection needle 15, causing the oil injection needle 15 to move upward, thereby connecting the vacuum port 14 and the oil outlet 151, allowing the compressor to be vacuumed. After vacuuming is completed, the pressure on the gun body 1 is released. At this time, the oil injection needle 15 returns to its original position under the action of the spring 2, and the oil injection needle 15 and the vacuum port are sealed to each other, while the oil injection port 11 and the oil outlet 151 are connected to each other, allowing the compressor to be filled with oil. By driving the gun body 1 downward and releasing the pressure to return to its original position, the automatic switching between oil filling and vacuuming is realized, improving the automation level of the oil filling process.

[0071] The resetting function of the spring 2 in this embodiment ensures that the oil injection needle 15 accurately returns to its initial position after each vacuuming, guaranteeing the stability and accuracy of the subsequent oil injection process. Furthermore, the buffering effect of the spring 2 reduces the impact and wear on the oil injection needle 15 during movement, thereby extending the service life of the oil injection structure.

[0072] Example 3

[0073] like Figures 1-5 As shown, this embodiment is an improvement on embodiment 2.

[0074] In this embodiment, a specific implementation of the mounting cavity 16 and the oil injection needle 15 is provided.

[0075] The mounting cavity 16 includes a first cavity 161 and a second cavity 162 that are interconnected, and the second cavity 162 is coaxially arranged with the first cavity 161.

[0076] The oil injection needle 15 includes a first needle body 152 and a second needle body 154 that are interconnected. The first needle body 152 is disposed in the first cavity 161, and the second needle body 154 is disposed in the second cavity 162. The spring 2 is disposed in the second cavity 162 and located on the periphery of the second needle body 154.

[0077] The oil injection needle 15 is composed of a first needle body 152 and a second needle body 154 that are interconnected. This segmented design allows each part of the oil injection needle 15 to fit tightly with the mounting cavity 16, ensuring stability during movement and also helping to reduce wear and deformation of the oil injection needle 15.

[0078] A limiting bearing 17 is provided inside the first cavity 161, and a limiting ring 153 is provided at the junction of the first needle body 152 and the second needle body 154. The limiting ring 153 is disposed opposite to the limiting bearing 17, and the limiting bearing 17 is used to restrict the movement of the limiting ring 153. The setting of the limiting bearing 17 ensures that when the limiting bearing 17 and the limiting ring 153 are in contact, the movement of the oil injection needle 15 is restricted. This design prevents the oil injection needle 15 from dislodging from the mounting cavity 16 during movement, ensuring the safety of the oil injection process. More specifically, the first needle body 152 passes through the inner ring of the limiting bearing 17, and the diameter of the inner ring of the limiting bearing 17 is larger than the outer diameter of the first needle body 152. Therefore, when one end of the first needle body 152 can move through the limiting bearing 17, the oil injection needle 15 cannot move when the limiting ring 153 is in contact with the limiting bearing 17.

[0079] In this embodiment, the vacuum port 14 is disposed on the side wall of the first cavity 161, and the first needle body 152 is provided with a first through hole corresponding to the vacuum port 14. After the first needle body 152 moves to a set position, the first through hole aligns with the vacuum port 14, thereby enabling the inside of the oil injection needle 15 to communicate with the vacuum port 14, that is, enabling the oil outlet 151 to communicate with the vacuum port 14.

[0080] In this embodiment, the scheme is further optimized by detailing the structure of the oil injection needle 15 and the mounting cavity 16, so that the oil injection needle 15 can move and reset more stably when subjected to force, which helps to improve the stability during oil injection.

[0081] In actual use, when the external drive structure drives the gun body 1 downward, the oil inlet of the compressor squeezes the oil outlet 151 of the oil injection needle 15, causing the oil injection needle 15 to move upward. During this process, the second needle body 154 squeezes the spring 2 and moves the first needle body 152 together, thereby enabling the vacuum port 14 to connect with the first through hole, that is, ultimately connecting the vacuum port 14 with the oil outlet 151, allowing for vacuuming operations. After vacuuming is completed, the pressure on the gun body 1 is released. Under the action of the spring 2, the second needle body 154 resets, and moves the first needle body 152 back to its initial position. At this time, the vacuum port 14 and the first through hole are sealed to each other, and the oil injection port 11 and the oil outlet 151 are connected by a valve, allowing for oil injection operations.

[0082] Example 4

[0083] like Figures 1-5 As shown, this embodiment is an improvement on embodiment 3.

[0084] In this embodiment, the gun body 1 further includes a connecting seat 12, which is connected to the first cavity 161. The oil injection port 11 is disposed on the connecting seat 12 and communicates with the first needle body 152 for injecting lubricating oil into the compressor.

[0085] A solenoid valve 3 is provided on the connecting seat 12. The solenoid valve 3 is used to control the opening and closing of the oil injection port 11 and the first needle body 152. The solenoid valve 3 is connected to an external control system via a wire, and the start and stop of the oil injection process can be remotely controlled as needed.

[0086] In this embodiment, the oil inlet 11 is controlled by a solenoid valve 3. When oil injection is required, an external control system sends a signal to the solenoid valve 3, which opens, connecting the oil inlet 11 to the first needle body 152. Lubricating oil enters the first needle body 152 through the oil inlet 11 and then flows into the compressor through the oil outlet 151. After oil injection is complete, the external control system sends a closing signal to the solenoid valve 3, which closes, disconnecting the oil inlet 11 from the first needle body 152 and stopping the oil injection. The design of the solenoid valve 3 enables remote control of the oil injection process, improving its controllability and accuracy. The on / off control of the solenoid valve 3 effectively prevents lubricating oil leakage and waste, while also avoiding safety accidents caused by misoperation. The connection between the solenoid valve 3 and the external control system makes the oil injection process more automated and intelligent, reducing manual intervention and labor intensity.

[0087] Example 5

[0088] like Figures 1-5 As shown, this embodiment is an improvement on embodiment 4.

[0089] In this embodiment, the connecting seat 12 is provided with an air outlet 13, which communicates with the first needle body 152. The design of the air outlet 13 allows gas to be blown into the oil injection needle 15 through an external air source after the oil injection process is completed.

[0090] By blowing air into the oil injection needle 15 through the air blowing port 13, the remaining lubricating oil in the oil injection needle 15 after the oil injection is completed can be blown into the compressor, thereby ensuring that the oil injection amount can reach the target oil injection amount.

[0091] The air-blowing process is as follows: After oil injection is completed, close solenoid valve 3 to disconnect the connection between oil injection port 11 and the first needle body 152. Next, blow gas (such as compressed air or nitrogen) into the oil injection needle 15 through air-blowing port 13. The gas blows the remaining lubricating oil in the oil injection needle 15 into the compressor, ensuring that the oil injection volume reaches the target volume. After the air-blowing process is completed, the air-blowing port 13 can be closed to complete the entire oil injection operation.

[0092] The air-blowing process ensures that the lubricating oil in the injection needle 15 completely enters the compressor, improving the accuracy and completeness of the lubrication. This avoids the waste of residual lubricating oil in the injection needle 15 and improves the utilization rate of the lubricating oil. Furthermore, it ensures that the compressor receives sufficient lubricating oil, avoiding the inaccurate oil filling caused by residual lubricating oil in the injection needle 15, which is common in existing technologies. This helps improve the compressor's operating performance and lifespan.

[0093] Example 6

[0094] like Figures 1-5As shown, this embodiment is an improvement on embodiment 1.

[0095] In this embodiment, the connecting sleeve 5 is provided with a first sealing ring 51 and a second sealing ring 52. The first sealing ring 51 and the second sealing ring 52 are both sleeved around the oil injection needle 15, and the second sealing ring 52 is located close to the oil outlet 151, while the first sealing ring 51 is located on the side of the second sealing ring 52 away from the oil outlet 151.

[0096] The inner diameter of the second sealing ring 52 is larger than the inner diameter of the first sealing ring 51.

[0097] In this embodiment, a first sealing ring 51 and a second sealing ring 52 are added to the connecting sleeve 5. This improvement can enhance the sealing performance during the oil injection process, ensure that the lubricating oil will not leak, and ensure a tight connection between the oil inlet of the compressor and the oil outlet 151 of the oil injection needle 15.

[0098] The second sealing ring 52 is positioned close to the oil outlet 151, directly contacting the compressor's oil inlet to form the first seal. The first sealing ring 51 is located on the side of the second sealing ring 52 furthest from the oil outlet 151, serving as a second seal to further enhance the sealing effect. The inner diameter of the second sealing ring 52 is larger than that of the first sealing ring 51. This design allows the second sealing ring 52 a certain amount of elastic deformation space under pressure, better adapting to the compressor's oil inlet and ensuring sealing performance.

[0099] During use, the connecting sleeve 5 is tightened onto the compressor's oil inlet. The second sealing ring 52 initially contacts the compressor's oil inlet, forming a preliminary seal. As the connecting sleeve 5 is further tightened, the first sealing ring 51 also comes into close contact with the compressor's oil inlet, forming a double seal.

[0100] With the double seal in place, the lubricating oil is injected into the compressor through the oil inlet 11, the second needle body 154, and the oil outlet 151. During the oil injection process, the first sealing ring 51 and the second sealing ring 52 work together to ensure that the lubricating oil does not leak from the connecting sleeve 5.

[0101] Example 7

[0102] like Figures 1-5 As shown, this embodiment is an improvement on embodiment 1.

[0103] In this embodiment, a connecting structure 4 is also included. The connecting structure 4 includes a connecting flange 43 and a connecting post 41. The connecting flange 43 is disposed on one side of the gun body 1. A mounting base plate 6 is disposed on the gun body 1. The connecting flange 43 is fixedly connected to the mounting base plate 6 through the connecting post 41.

[0104] The connecting flange 43 is provided with a connecting hole 431.

[0105] In this embodiment, the connection structure 4 further includes a connection plate 42, the connection flange 43 is fixed in the connection plate 42, and multiple connection columns 41 are provided, all of which are fixedly connected to the connection plate 42; the multiple connection columns 41 are fixedly connected to the connection plate 42, forming a sturdy connection frame.

[0106] The connecting plate 42 is also provided with a locking structure 421, which is located at one end of the connecting hole 431 and extends into the connecting hole 431.

[0107] This embodiment provides a connection method between the oil injection structure and the external drive device to ensure a reliable connection between the gun body 1 and the external drive device (such as a robot).

[0108] In practical applications, the connecting hole 431 on the connecting flange 43 is used to mate with the robot's connecting component. The robot's connecting component extends into the connecting hole 431 and engages with it. The connecting hole 431 is initially locked to the side wall of the robot's connecting component. After the robot's connecting component engages with the locking structure 421, the locking continues, allowing the locking component in the connecting hole 431 to engage with the robot's connecting component a second time. This enhances the tightness of the connection and prevents loosening during the oil filling process, which could prevent the robot from effectively driving the oil filling structure and cause abnormal oil filling.

[0109] In practical applications, once the robot's connecting component, i.e. the robotic arm, is locked to the connecting structure 4, the oil injection structure can be driven to lock itself to the compressor's oil inlet, or the oil injection structure can be driven away from the compressor's oil inlet, so that the oil injection needle 15 moves under the action of the spring 2.

[0110] This embodiment significantly improves the connection stability between the gun body 1 and the robot through the combined design of the connecting flange 43, connecting column 41, and connecting plate 42. Furthermore, the locking structure 421 in the connecting structure 4 ensures a tight connection between the robot and the connecting structure 4, preventing safety accidents caused by loosening or leakage during the oil filling process.

[0111] Example 8

[0112] like Figures 1-6 As shown, this embodiment provides a compressor oil injection method, which is implemented using the compressor oil injection structure described above;

[0113] The method includes the following steps:

[0114] S100. Obtain the vacuum level inside the compressor; specifically, use a vacuum sensor or related measuring equipment to monitor the vacuum level inside the compressor in real time.

[0115] S200. When the vacuum level inside the compressor exceeds the set threshold, the oil injection needle 15 is moved to connect the oil outlet 151 with the vacuum port 14, and the vacuum pump is activated to perform a vacuuming operation on the compressor. The vacuum level inside the compressor exceeds the set threshold, meaning the internal air pressure is too high, which is not conducive to oil injection; therefore, a vacuuming operation is required. The vacuum pump is activated to continuously extract air from the compressor until the vacuum level reaches the set requirement.

[0116] S300: When the vacuum level inside the compressor is lower than the set threshold, vacuuming stops.

[0117] S400: Control the movement of the oil injection needle 15 so that the oil outlet 151 is connected to the oil injection port 11 to inject oil into the compressor.

[0118] After confirming that the vacuum level inside the compressor meets the requirements, the control system issues another command to move the oil injection structure, causing the oil injection needle 15 to move. The movement of the oil injection needle 15 connects the oil outlet 151 with the oil injection port 11, allowing lubricating oil to enter the compressor through the oil injection needle 15.

[0119] This method automates and automates the oil injection process by automatically acquiring the vacuum level inside the compressor and controlling the movement of the oil injection needle 15 and the start / stop of the vacuum equipment according to a preset threshold. This reduces the complexity and error rate of manual operation. Furthermore, injecting oil under negative pressure reduces the risk of oil spraying due to unstable air pressure and effectively avoids problems such as air bubbles or uneven mixing of lubricating oil caused by air pressure issues during injection, thereby improving the quality of oil injection.

[0120] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0121] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this application.

[0122] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A compressor oil injection structure, characterized in that, include: Gun body (1), wherein an oil injection needle (15) is provided in the gun body (1), the oil injection needle (15) is movable in the gun body (1) along its own axis, and one end of the oil injection needle (15) is provided with an oil outlet (151); The gun body (1) is provided with a vacuum port (14) and an oil injection port (11), and the vacuum port (14) is connected to a vacuum pumping device. When the oil injection needle (15) moves, the oil outlet (151) can be connected to the vacuum port (14) or the oil injection port (11). The gun body (1) is provided with a mounting cavity (16), and the oil injection needle (15) is provided in the mounting cavity (16); a connecting sleeve (5) is provided at one end of the gun body (1), and the oil outlet (151) of the oil injection needle (15) extends out from the connecting sleeve (5); A spring (2) is provided in the mounting cavity (16). The spring (2) is sleeved around the oil injection needle (15), and one end of the spring (2) is held in the mounting cavity (16), while the other end is fixedly connected to the oil injection needle (15). When the oil outlet (151) is subjected to pressure, the oil injection needle (15) can squeeze the spring (2) and move along its own axis. The mounting cavity (16) includes a first cavity (161) and a second cavity (162) that are interconnected, and the second cavity (162) is coaxially arranged with the first cavity (161); The oil injection needle (15) includes a first needle body (152) and a second needle body (154) that are interconnected. The first needle body (152) is disposed in the first cavity (161), and the second needle body (154) is disposed in the second cavity (162). The spring (2) is disposed inside the second cavity (162) and located on the periphery of the second needle body (154); A limiting bearing (17) is provided inside the first cavity (161), and a limiting ring (153) is provided at the junction of the first needle body (152) and the second needle body (154). The limiting ring (153) is disposed opposite to the limiting bearing (17), and the limiting bearing (17) is used to restrict the movement of the limiting ring (153).

2. The compressor oil injection structure according to claim 1, characterized in that: The vacuum port (14) is located on the side wall of the first cavity (161), and the first needle body (152) is provided with a first through hole corresponding to the vacuum port (14).

3. The compressor oil injection structure according to claim 1, characterized in that: The gun body (1) also includes a connecting seat (12), which is connected to the first cavity (161), and the oil inlet (11) is provided on the connecting seat (12) and communicates with the first needle body (152). The connecting seat (12) is provided with a solenoid valve (3), which is used to control the opening and closing of the oil inlet (11) and the first needle body (152).

4. The compressor oil injection structure according to claim 3, characterized in that: The connecting seat (12) is provided with an air blowing port (13), which is connected to the first needle body (152).

5. The compressor oil injection structure according to any one of claims 2-4, characterized in that: The connecting sleeve (5) is provided with a first sealing ring (51) and a second sealing ring (52). The first sealing ring (51) and the second sealing ring (52) are both sleeved around the oil injection needle (15), and the second sealing ring (52) is located close to the oil outlet (151). The first sealing ring (51) is located on the side of the second sealing ring (52) away from the oil outlet (151). The inner diameter of the second sealing ring (52) is larger than the inner diameter of the first sealing ring (51).

6. The compressor oil injection structure according to any one of claims 1-4, characterized in that: It also includes a connection structure (4), which includes a connection flange (43) and a connection column (41). The connection flange (43) is disposed on one side of the gun body (1). The gun body (1) is provided with a mounting base plate (6). The connection flange (43) is fixedly connected to the mounting base plate (6) through the connection column (41). The connecting flange (43) is provided with a connecting hole (431).

7. The compressor oil injection structure according to claim 6, characterized in that: The connection structure (4) further includes a connection plate (42), the connection flange (43) is fixed in the connection plate (42), and multiple connection columns (41) are provided, all of which are fixedly connected to the connection plate (42). The connecting plate (42) is also provided with a locking structure (421), which is located at one end of the connecting hole (431) and extends into the connecting hole (431).

8. A method for injecting oil into a compressor, characterized in that: The compressor oil injection structure as described in any one of claims 1-7 is adopted; The method includes the following steps: Obtain the vacuum level inside the compressor; When the vacuum level inside the compressor exceeds the set threshold, the oil injection needle (15) is moved so that the oil outlet (151) is connected to the vacuum port (14), and the vacuum equipment is started to perform vacuuming operation on the compressor. When the vacuum level inside the compressor is lower than the set threshold, vacuuming stops. Control the movement of the oil injection needle (15) so that the oil outlet (151) is connected to the oil injection port (11) to inject oil into the compressor.

Images