Compressor oil injection structure and compressor oil injection method

Abstract

The invention provides a compressor oil injection structure and a compressor oil injection method, and belongs to the technical field of compressor production, the oil injection structure comprises a gun body, an oil injection needle is arranged in the gun body, the oil injection needle can move in the gun body in the axis direction of the oil injection needle, and an oil outlet is formed in one end of the oil injection needle. A vacuumizing opening and an oil filling opening are formed in the gun body, and the vacuumizing opening is externally connected with vacuumizing equipment; when the oil injection needle moves, the oil outlet can be communicated with the vacuumizing opening or the oil injection opening. According to the structure, oil can be injected into the compressor after the compressor is vacuumized, so that the oil injection efficiency of the compressor can be improved, the oil injection phenomenon in the oil injection process is avoided, and a powerful guarantee is provided for efficient production and stable operation of the compressor.

Description

Technical Field

[0001] The invention relates to the technical field of compressor production, and in particular to a compressor oil injection structure and a compressor oil injection method. Background Art

[0002] In the maintenance and care of compressors, oil filling is an important link. Lubricating oil plays an important role inside the compressor. For example, it can reduce the friction and wear of components such as bearings, gears and pistons; it can help absorb and carry the heat generated inside the compressor, and transfer the heat to the outside through the oil cooling system, thereby reducing the operating temperature of the compressor and preventing overheating; in some compressors, lubricating oil can also form a sealing layer between the piston and the cylinder to reduce gas leakage and improve compression efficiency. At present, the oil filling method of the compressor is usually to use an oil filling gun to directly fill the oil into the oil filling port of the compressor. However, this method has many technical difficulties when it comes to compressors with narrow oil inlets. First, due to the complexity of the internal structure of the compressor, especially some compressors with a small direct clearance between the motor rotor, the oil inlet is often relatively narrow, which leads to a serious impact on the speed of emptying and oil filling, making the entire oil filling process extremely slow. Secondly, when the oil filling speed is too fast, when the lubricating oil enters the fully enclosed compressor, because the gas in the compressor cannot be immediately discharged, when there is a certain air pressure inside the compressor, the oil often cannot enter the compressor smoothly, but is prone to oil spraying. This not only wastes precious oil resources, but may also cause damage to the compressor and even cause safety accidents.

[0003] Therefore, it is necessary to improve the oil injection method of the existing compressor to overcome the defects of the prior art. Summary of the invention

[0004] In order to overcome the problems existing in the related art, one of the objects of the present invention is to provide a compressor oil injection structure, which can inject oil into the compressor after the compressor is vacuumed, thereby improving the oil injection efficiency of the compressor and avoiding the occurrence of oil spraying during the oil injection process, thereby providing a strong guarantee for the efficient production and stable operation of the compressor.

[0005] A compressor oil injection structure, comprising:

[0006] A gun body, wherein an oil injection needle is arranged in the gun body, the oil injection needle can move along its own axis direction in the gun body, and an oil outlet is arranged at one end of the oil injection needle;

[0007] The gun body is provided with a vacuum port and an oil filling port, and the vacuum port is externally connected to a vacuum device;

[0008] When the oil injection needle moves, the oil outlet can be connected to the vacuum port or to the oil injection port.

[0009] The working principle of the 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. Start the vacuum pumping equipment, and vacuum the inside of the compressor through the vacuum pumping port until a negative pressure state is formed in the compressor cavity. After the vacuum pumping is completed, the oil injection needle is moved by the control mechanism so that the oil injection port is connected to the oil outlet. Turn on the oil injection system, and the lubricating oil enters the oil outlet through the oil injection port, and then is injected into the compressor through the oil outlet. During the oil injection process, due to the low air pressure inside the compressor, the lubricating oil can enter smoothly and no oil spraying will occur.

[0010] The oil injection structure can ensure that the air pressure inside the compressor cavity will not be too high through the continuous operation of vacuuming and oil injection, and the lubricating oil will not spray out during oil injection, thereby ensuring the smooth progress of the oil injection process and reducing the waste of lubricating oil. The vacuuming process can effectively remove the air and impurities inside the compressor, ensuring the purity of the lubricating oil and the quality of oil injection.

[0011] In a preferred technical solution of the present invention, a mounting cavity is provided in the gun body, and the oil injection needle is arranged 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 arranged in the installation cavity, and the spring is sleeved on the periphery of the oil injection needle, and one end of the spring is held in the installation cavity, and the other end is fixedly connected to the oil injection needle;

[0013] When the oil outlet is subjected to pressure, the oil injection needle can squeeze 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 force along the axial direction of the oil injection needle.

[0015] In actual use, the connecting sleeve is used to connect with the oil inlet of the compressor. When the connecting sleeve is tightly fitted on the oil inlet of the compressor, the connecting sleeve and the oil inlet of the compressor are sealed with each other. At this time, by driving the gun body downward, the oil inlet of the compressor squeezes the oil outlet of the oil injection needle, causing the oil injection needle to move upward, thereby connecting the vacuum port with the oil outlet, and the compressor can be vacuumed. After the vacuum is completed, the pressure on the gun body is removed. At this time, the oil injection needle is reset under the action of the spring, and the oil injection needle and the vacuum port are sealed with each other, while the oil injection port and the oil outlet are connected with each other, and the compressor can be filled with oil. By driving the gun body downward and resetting the pressure, the automatic switching between oil injection and vacuum is realized, and the automation degree of the oil injection process is improved.

[0016] In a preferred technical solution of the present invention, the installation cavity comprises a first cavity and a second cavity which are interconnected, and the second cavity is coaxially arranged with the first cavity;

[0017] The oil injection needle comprises a first needle body and a second needle body which are connected to each other, the first needle body is arranged in the first cavity, the second needle body is arranged in the second cavity, and the spring is arranged in the second cavity and is located at the periphery of the second needle body;

[0018] A limit bearing is arranged in the first cavity, a limit ring is arranged at the junction of the first needle body and the second needle body, the limit ring and the limit bearing are arranged opposite to each other, and the limit bearing is used to limit the movement of the limit ring.

[0019] In a preferred technical solution of the present invention, the vacuum port is arranged 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, and the detailed structural design of the oil injection needle and the installation cavity is made so that the oil injection needle can move and reset more stably when subjected to force, thereby improving the stability of the oil injection process. The setting of the limit bearing enables the limit bearing to limit the movement of the needle body when it is connected to the limit ring. This design prevents the oil injection needle from escaping from the installation cavity during movement, thereby ensuring the safety of the oil injection process.

[0021] In a preferred technical solution of the present invention, the gun body further comprises a connecting seat, the connecting seat is connected to the first cavity, the oil filling port is arranged on the connecting seat, and the oil filling port is communicated with the first needle body;

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

[0023] In this embodiment, the oil filling port is controlled by setting a solenoid valve. When oil filling is needed, a signal is sent to the solenoid valve through the external control system, the solenoid valve opens, the oil filling port is connected with the first needle body, the lubricating oil enters the second needle body through the oil filling port, and then is injected into the compressor through the oil outlet. After the oil filling is completed, the external control system sends a closing signal to the solenoid valve, the solenoid valve closes, the oil filling port is disconnected from the first needle body, and the oil filling is stopped. Through the design of the solenoid valve, remote control of the oil filling process is achieved, and the controllability and accuracy of the oil filling process are improved. The on-off control of the solenoid valve can effectively prevent the leakage and waste of lubricating oil, and also avoid safety accidents caused by misoperation. The connection between the solenoid valve and the external control system makes the oil filling process more automated and intelligent, reducing manual intervention and labor intensity.

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

[0025] Blowing air into the oil filling needle through the air blowing port can blow the remaining lubricating oil in the oil filling needle into the compressor after the oil filling is completed, thereby ensuring that the oil filling amount can reach the target oil filling amount. The blowing process is as follows: After the oil filling is completed, close the solenoid valve and disconnect the connection between the oil filling port and the first needle body. Then, blow gas (such as compressed air or nitrogen) into the oil filling needle through the air blowing port. The gas blows the remaining lubricating oil in the oil filling needle into the compressor, ensuring that the oil filling amount can reach the target oil filling amount. After the blowing process is completed, the air blowing port can be closed to complete the entire oil filling operation.

[0026] In a preferred technical solution of the present invention, a first sealing ring and a second sealing ring are provided in the connecting sleeve, the first sealing ring and the second sealing ring are both sleeved on the periphery of the oil injection needle, and the second sealing ring is arranged close to the oil outlet, and the first sealing ring is located on a side of the second sealing ring away from the oil outlet;

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

[0028] In this embodiment, the design of a first sealing ring and a second sealing ring is added to the connecting sleeve. This improvement can improve the sealing performance during the oil filling process, ensure that the lubricating oil does not leak, and at the same time ensure the tight connection between the oil inlet of the compressor and the oil outlet of the oil filling needle. The design of the double sealing ring significantly improves the sealing performance between the connecting sleeve and the oil inlet of the compressor, effectively preventing the leakage of lubricating oil.

[0029] In a preferred technical solution of the present invention, a connecting structure is further included, the connecting structure includes a connecting flange and a connecting column, the connecting flange is arranged on one side of the gun body, a mounting base plate is arranged on the gun body, and the connecting flange is fixedly connected to the mounting base plate through the connecting column;

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

[0031] In a preferred technical solution of the present invention, the connection structure further comprises a connection plate, the connection flange is fixed in the connection plate, a plurality of connection columns are provided, and the plurality of connection columns are fixedly connected to the connection plate;

[0032] The connecting plate is also provided with a locking structure, which is arranged 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 the 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, the connecting column and the connecting plate significantly improves the stability of the connection between the gun body and the external device such as a robot. In addition, the locking structure in the connecting structure ensures the tightness of the connection between the robot and the connecting structure, preventing the oil injection from failing due to looseness during the oil injection process.

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

[0035] The method comprises the following steps:

[0036] Obtain the vacuum degree in the compressor;

[0037] When the vacuum degree in the compressor exceeds the set threshold, the oil injection needle is controlled to move so that the oil outlet is connected to the vacuum port, and the vacuum equipment is started to vacuum the compressor;

[0038] When the vacuum degree in the compressor is less than the set threshold, vacuuming stops;

[0039] The oil filling needle is controlled to move so that the oil outlet is connected with the oil filling port to fill the compressor with oil.

[0040] This method improves the accuracy and efficiency of oil injection by monitoring the vacuum degree in the compressor in real time and automatically controlling the vacuum pumping and oil injection process according to the vacuum degree. It also ensures that the compressor reaches a sufficient vacuum degree before oil injection, which helps to improve the oil injection efficiency and prevent the occurrence of oil spraying during oil injection due to excessive internal air pressure in the compressor.

[0041] The beneficial effects of the present invention are:

[0042] The present invention provides a compressor oil injection structure, which includes a gun body, an oil injection needle is arranged in the gun body, the oil injection needle can move along its own axis direction in the gun body, and an oil outlet is arranged at one end of the oil injection needle. A vacuum port and an oil injection port are arranged on the gun body, and the vacuum port is externally connected to a vacuum pumping device; when the oil injection needle moves, the oil outlet can be connected to the vacuum port or to the oil injection port. During use, the oil outlet is used to connect with the oil inlet of the compressor, and when the vacuum pumping device is connected with the vacuum port, the inside of the compressor can be vacuumed through the vacuum port, so that the compressor cavity is evacuated into a negative pressure state. After the vacuum pumping is completed, the air pressure inside the compressor cavity is reduced, and at this time the oil injection needle moves, so that the oil injection port is connected with the oil outlet, and lubricating oil can be poured into the compressor. In addition, since the air pressure inside the compressor cavity is low, the lubricating oil can smoothly enter the compressor cavity during the oil injection process, and no oil spraying will occur during the oil injection process, thereby ensuring the stability and safety of the oil injection process and effectively improving the oil injection efficiency of the compressor.

[0043] The present application also provides a method for oiling a compressor based on the above-mentioned oiling structure, the method comprising: obtaining the vacuum degree in the compressor; when the vacuum degree in the compressor exceeds a set threshold, controlling the movement of the oiling needle so that the oil outlet is connected to the vacuuming port, and starting the vacuuming equipment to vacuum the compressor; when the vacuum degree in the compressor is less than the set threshold, the vacuuming stops; controlling the movement of the oiling needle so that the oil outlet is connected to the oiling port, and oiling the compressor. This method realizes the automation and intelligence of the oiling process by automatically obtaining the vacuum degree in the compressor and automatically controlling the movement of the oiling needle and the start and stop of the vacuuming equipment according to the preset threshold, reducing the complexity and error rate of manual operation. In addition, oiling under negative pressure can reduce the risk of oil injection caused by unstable air pressure, and can effectively avoid problems such as bubbles or uneven mixing caused by air pressure problems during the injection of lubricating oil, thereby improving the quality of oiling. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

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

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

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

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

[0050] Reference numerals:

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

[0052] The preferred embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the preferred embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.

[0053] At present, the oil filling method of the compressor is usually to use an oil filling gun to directly fill the oil into the oil filling port of the compressor. However, this method has many technical difficulties when it comes to compressors with narrow oil inlets. First, due to the complexity of the internal structure of the compressor, especially some compressors with a small direct clearance between the motor rotor, the oil inlet is often relatively narrow, which seriously affects the speed of emptying and oil filling, making the entire oil filling process extremely slow. Secondly, when the oil filling speed is too fast, when the lubricating oil enters the fully enclosed compressor, the gas in the compressor cannot be immediately discharged. Under the condition of a certain air pressure inside the compressor, the oil often cannot enter the compressor smoothly, but is prone to oil spraying. This not only wastes precious oil resources, but may also damage the compressor and even cause safety accidents.

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

[0055] Example 1

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

[0057] The gun body 1 is provided with an oil injection needle 15, which can move along its own axis in the gun body 1, and an oil outlet 151 is provided at one end of the oil injection needle 15; specifically, the oil injection needle 15 is made of stainless steel, and the surface is smoothed to reduce friction during movement.

[0058] The gun body 1 is provided with a vacuum port 14 and an oil filling port 11, and the vacuum port 14 is connected to an external vacuum device; the vacuum port 14 is located on the gun body 1 and is connected to an external vacuum device through a pipeline. The vacuum port 14 is designed with a quick connector to facilitate quick connection and disconnection with the vacuum device.

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

[0060] The working principle of the 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 that there will be no leakage during operation. The movement of the oil injection needle 15 is controlled so that the oil outlet 151 is connected to the vacuum port 14. At this time, the vacuum pumping equipment is connected to the inner cavity of the compressor. Start the vacuum pumping equipment and vacuum the inside of the compressor through the vacuum port 14 until a negative pressure state is formed in the compressor cavity. After the vacuum pumping is completed, the movement of the oil injection needle 15 is controlled by the control mechanism so that the oil injection port 11 is connected to the oil outlet 151. Turn on the oil injection system, and the lubricating oil enters the oil outlet 151 through the oil injection port 11, and then is injected into the compressor through the oil outlet 151. During the oil injection process, due to the low air pressure inside the compressor, the lubricating oil can enter smoothly and there will be no oil spraying.

[0061] The oil injection structure can ensure that the air pressure inside the compressor cavity will not be too high through the continuous operation of vacuuming and oil injection, and the lubricating oil will not spray out during oil injection, thereby ensuring the smooth progress of the oil injection process, ensuring the stability and safety of the oil injection process, and effectively improving the oil injection efficiency of the compressor and reducing the waste of lubricating oil. The vacuuming process can also effectively remove air and impurities inside the compressor to ensure the purity of the lubricating oil and the quality of oil injection.

[0062] In this embodiment, the movement of the oil injection needle 15 can be achieved by manual control or automatic control. Manual control can be achieved by a joystick, and automatic control can be achieved by an actuator such as a servo motor. The start and stop of the vacuum equipment and the oil injection system can be centrally controlled by a control panel, which is convenient for operators to operate.

[0063] Example 2

[0064] like Figure 1-Figure 5 As shown, this embodiment is improved on the basis of 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 arranged in the mounting cavity 16; a connecting sleeve 5 is provided at one end of the gun body 1, and an oil outlet 151 of the oil injection needle 15 extends out from the connecting sleeve 5;

[0067] A spring 2 is arranged in the installation cavity 16, and the spring 2 is sleeved on the periphery of the oil injection needle 15, and one end of the spring 2 is held in the installation cavity 16, and the other end is fixedly connected to the oil injection needle 15;

[0068] 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 selection of the spring 2 needs to consider its elastic modulus, fatigue strength and other parameters 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, and the connecting sleeve 5 is tightly connected to the gun body 1, and a guide hole may be provided inside to guide the movement of the oil injection needle 15 to change the connection state of the oil outlet 151. One end of the connecting sleeve 5 may be designed with a thread or a quick connector to facilitate tight connection with the oil inlet 101 of the compressor 100. The pressure of the oil outlet 151 may be to control the movement of the gun body 1 so that the oil outlet 151 abuts against the oil inlet of the compressor, so that the oil inlet of the compressor will exert a reaction force on the oil outlet 151, so that the needle body moves to achieve a state in which the oil outlet 151 is connected to the vacuum port 14; when the oil inlet 101 of the compressor 100 does not exert a reaction force on the oil outlet 151, the oil injection needle 15 is reset under the action of the spring 2 and restored to the connection state of 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 sleeved on the oil inlet of the compressor, the connecting sleeve 5 and the oil inlet of the compressor are sealed with 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, so that the oil injection needle 15 moves upward, so that the vacuum port 14 is connected with the oil outlet 151, and the compressor can be vacuumed. After the vacuum is completed, the pressure on the gun body 1 is released. At this time, the oil injection needle 15 is reset under the action of the spring 2, and the oil injection needle 15 and the vacuum port are sealed with each other, while the oil injection port 11 and the oil outlet 151 are connected with each other, and the compressor can be filled with oil. By driving the gun body 1 downward and resetting the pressure, the automatic switching between oil injection and vacuum is realized, and the automation degree of the oil injection process is improved.

[0071] The reset function of the spring 2 of this embodiment ensures that the oil injection needle 15 can accurately return to the initial position after each vacuuming, ensuring the stability and accuracy of the subsequent oil injection process. In addition, the buffering effect of the spring 2 reduces the impact and wear of the oil injection needle 15 during the movement, thereby extending the service life of the oil injection structure.

[0072] Example 3

[0073] like Figure 1-Figure 5 As shown, this embodiment is improved on the basis of embodiment 2.

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

[0075] The installation cavity 16 includes a first cavity 161 and a second cavity 162 which are connected to each other, 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 which are connected to each other. The first needle body 152 is arranged in the first cavity 161, and the second needle body 154 is arranged in the second cavity 162. The spring 2 is arranged in the second cavity 162 and is located at 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 which are interconnected. This segmented design enables each part of the oil injection needle 15 to fit closely with the mounting cavity 16, ensuring stability during movement and helping to reduce wear and deformation of the oil injection needle 15.

[0078] A limit bearing 17 is arranged in the first cavity 161, and a limit ring 153 is arranged at the junction of the first needle body 152 and the second needle body 154. The limit ring 153 is arranged opposite to the limit bearing 17, and the limit bearing 17 is used to limit the movement of the limit ring 153. The setting of the limit bearing 17 can limit the movement of the oil injection needle 15 when the limit bearing 17 is connected with the limit ring 153. This design prevents the oil injection needle 15 from escaping from the installation cavity 16 during the movement, ensuring the safety of the oil injection process. More specifically, the first needle body 152 penetrates the limit bearing 17 from the inner ring of the limit bearing 17, and the diameter of the inner ring of the limit 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 penetrate the limit bearing 17 and move, and when the limit ring 153 is connected with the limit bearing 17, the oil injection needle 15 cannot move.

[0079] In this embodiment, the vacuum port 14 is arranged 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 is aligned with the vacuum port 14, so that the inside of the oil injection needle 15 is connected with the vacuum port 14, that is, the oil outlet 151 is connected with the vacuum port 14.

[0080] In this embodiment, the solution is further optimized, and through the detailed structure of the oil injection needle 15 and the mounting cavity 16, 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 driving 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 drives the first needle body 152 to move together, so that the vacuum port 14 can be connected to the first through hole, that is, the vacuum port 14 is finally connected to the oil outlet 151, and the vacuum operation can be performed. After the vacuuming is completed, the pressure on the gun body 1 is released. Under the action of the spring 2, the second needle body 154 is reset and drives the first needle body 152 back to the initial position. At this time, the vacuum port 14 and the first through hole are sealed with each other, and the oil injection port 11 and the oil outlet 151 are connected to each other through the valve control, and the oil injection operation can be performed.

[0082] Example 4

[0083] like Figure 1-Figure 5 As shown, this embodiment is improved on the basis of embodiment 3.

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

[0085] The connection seat 12 is provided with a solenoid valve 3, which is used to control the connection and disconnection between the oil filling port 11 and the first needle 152. The solenoid valve 3 is connected to an external control system through wires, and can remotely control the start and stop of the oil filling process as needed.

[0086] In this embodiment, the oil filling port 11 is controlled by setting the solenoid valve 3. When oil filling is needed, a signal is sent to the solenoid valve 3 through the external control system, the solenoid valve 3 is opened, the oil filling port 11 is connected with the first needle body 152, the lubricating oil enters the first needle body 152 through the oil filling port 11, and then is injected into the compressor through the oil outlet 151. After the oil filling is completed, the external control system sends a closing signal to the solenoid valve 3, the solenoid valve 3 is closed, the oil filling port 11 is disconnected from the first needle body 152, and the oil filling is stopped. Through the design of the solenoid valve 3, remote control of the oil filling process is achieved, and the controllability and accuracy of the oil filling process are improved. The on-off control of the solenoid valve 3 can effectively prevent the leakage and waste of lubricating oil, and also avoid safety accidents caused by misoperation. The connection between the solenoid valve 3 and the external control system makes the oil filling process more automated and intelligent, reducing manual intervention and labor intensity.

[0087] Example 5

[0088] like Figure 1-Figure 5 As shown, this embodiment is improved on the basis of embodiment 4.

[0089] In this embodiment, the connection seat 12 is provided with an air outlet 13, and the air outlet is communicated with the first needle body 152. The design of the air outlet 13 allows air 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 filling needle 15 through the blowing port 13, the lubricating oil remaining in the oil filling needle 15 after the oil filling is completed can be blown into the compressor, thereby ensuring that the oil filling amount can reach the target oil filling amount.

[0091] The blowing process is as follows: After the oil filling is completed, the solenoid valve 3 is closed, and the connection between the oil filling port 11 and the first needle body 152 is disconnected. Then, gas (such as compressed air or nitrogen) is blown into the oil filling needle 15 through the blowing port 13. The gas blows the remaining lubricating oil in the oil filling needle 15 into the compressor to ensure that the oil filling amount can reach the target oil filling amount. After the blowing process is completed, the blowing port 13 can be closed to complete the entire oil filling operation.

[0092] Through the air blowing process, it is ensured that the lubricating oil in the oil injection needle 15 completely enters the compressor, thereby improving the accuracy and completeness of the oil injection. It avoids the waste of the residual lubricating oil in the oil injection needle 15, and improves the utilization rate of the lubricating oil. It can also ensure that the compressor obtains sufficient lubricating oil, and avoids the situation in the prior art that the oil injection process is prone to inaccurate oil filling due to the residual lubricating oil in the oil injection needle 15, which helps to improve the operating performance and life of the compressor.

[0093] Example 6

[0094] like Figure 1-Figure 5As shown, this embodiment is improved on the basis of 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 on the periphery of the oil injection needle 15, and the second sealing ring 52 is arranged close to the oil outlet 151. The first sealing ring 51 is located on a side of the second sealing ring 52 away from the oil outlet 151.

[0096] The inner diameter of the second sealing ring 52 is greater 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 filling process, ensure that the lubricating oil does not leak, and ensure a tight connection between the oil inlet of the compressor and the oil outlet 151 of the oil filling needle 15.

[0098] The second sealing ring 52 is arranged near the oil outlet 151, directly in contact with the oil inlet of the compressor, forming a first seal. The first sealing ring 51 is located on the side of the second sealing ring 52 away from the oil outlet 151, and serves as a second seal to further enhance the sealing effect. The inner diameter of the second sealing ring 52 is larger than the inner diameter of the first sealing ring 51. This design allows the second sealing ring 52 to have a certain elastic deformation space when subjected to pressure, better adapts to the oil inlet of the compressor, and ensures sealing.

[0099] During use, the connecting sleeve 5 is tightly sleeved on the oil inlet of the compressor, and the second sealing ring 52 first contacts the oil inlet of the compressor to form a preliminary seal. As the connecting sleeve 5 is further tightened, the first sealing ring 51 also contacts the oil inlet of the compressor to form a double seal.

[0100] Under the protection of double sealing, the oil filling operation is performed, and the lubricating oil enters the compressor through the oil filling port 11, the second needle body 154, and the oil outlet 151. During the oil filling 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 Figure 1-Figure 5 As shown, this embodiment is improved on the basis of embodiment 1.

[0103] In this embodiment, a connection structure 4 is further included, the connection structure 4 includes a connection flange 43 and a connection column 41, the connection flange 43 is arranged on one side of the gun body 1, a mounting base plate 6 is arranged on the gun body 1, and the connection flange 43 is fixedly connected to the mounting base plate 6 through the connection column 41;

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

[0105] In this embodiment, the connecting structure 4 also includes a connecting plate 42, the connecting flange 43 is fixed in the connecting plate 42, and a plurality of connecting columns 41 are provided, and the plurality of connecting columns 41 are fixedly connected to the connecting plate 42; the plurality of connecting columns 41 are fixedly connected to the connecting plate 42, forming a solid connecting frame.

[0106] The connecting plate 42 is further provided with a locking structure 421 . The locking structure 421 is disposed 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 driving device to ensure a reliable connection between the gun body 1 and the external driving device (such as a robot).

[0108] In actual applications, the connection hole 431 on the connection flange 43 is used to dock with the connection component of the robot. The connection component of the robot extends into the connection hole 431 and is engaged with the connection hole 431. The connection hole 431 and the side wall of the connection component of the robot are locked once. After the connection component of the robot is connected to the locking structure 421, the locking is continued so that the locking component in the connection hole 431 can be locked with the connection component of the robot for a second time, thereby enhancing the tightness of the connection between the two and preventing loosening during the oil injection process, which causes the robot to be unable to effectively drive the oil injection structure to move, resulting in abnormal oil injection.

[0109] In actual applications, when the robot's connecting component, i.e., the robotic arm, is locked with the connecting structure 4, the oil injection structure can be driven to lock with the oil inlet of the compressor, or the oil injection structure can be driven away from the oil inlet of the compressor 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, the connecting column 41 and the connecting plate 42. In addition, the locking structure 421 in the connecting structure 4 ensures the tightness of the connection between the robot and the connecting structure 4, preventing safety accidents caused by looseness or leakage during the oil filling process.

[0111] Example 8

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

[0113] The method comprises the following steps:

[0114] S100, obtaining the vacuum degree in the compressor; specifically, using a vacuum degree sensor or related measuring equipment to monitor the vacuum degree inside the compressor in real time.

[0115] S200, when the vacuum degree in the compressor exceeds the set threshold, the oil injection needle 15 is controlled to move so that the oil outlet 151 is connected to the vacuum port 14, and the vacuum pumping device is started to vacuum the compressor; the vacuum degree in the compressor exceeds the set threshold, that is, the internal air pressure of the compressor is too high, which is not conducive to oil injection, so the compressor needs to be vacuumed. Start the vacuum pumping device and continue to extract air in the compressor until the vacuum degree reaches the set requirement.

[0116] S300, when the vacuum degree in the compressor is less than the set threshold, vacuuming stops;

[0117] S400 , controlling the oil injection needle 15 to move so that the oil outlet 151 is connected with the oil injection port 11 , and oil is injected into the compressor.

[0118] After confirming that the vacuum degree in the compressor meets the requirement, the control system issues another command to control the oil injection structure to move the oil injection needle 15. The movement of the oil injection needle 15 makes the oil outlet 151 communicate with the oil injection port 11, and the lubricating oil enters the compressor through the oil injection needle 15.

[0119] The method realizes automation and intelligence of the oil filling process by automatically obtaining the vacuum degree in the compressor and automatically controlling the movement of the oil filling needle 15 and the start and stop of the vacuum pumping device according to a preset threshold value, thereby reducing the complexity and error rate of manual operation. In addition, oil filling under negative pressure can reduce the risk of oil injection caused by unstable air pressure, and can effectively avoid problems such as bubbles or uneven mixing caused by air pressure problems during the injection of lubricating oil, thereby improving the quality of oil filling.

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

[0121] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.

[0122] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A compressor oil injection structure, characterized in that: include: A gun body (1), wherein an oil injection needle (15) is arranged in the gun body (1), and the oil injection needle (15) is movable in the gun body (1) along its own axial direction, and an oil outlet (151) is arranged at one end of the oil injection needle (15); The gun body (1) is provided with a vacuum port (14) and an oil filling port (11), and the vacuum port (14) is externally connected to a vacuum device; When the oil injection needle (15) moves, the oil outlet (151) can be connected to the vacuum port (14) or to the oil injection port (11).

2. The compressor oil injection structure according to claim 1, characterized in that: The gun body (1) is provided with a mounting cavity (16), and the oil injection needle (15) is arranged in the mounting cavity (16); a connecting sleeve (5) is provided at one end of the gun body (1), and an oil outlet (151) of the oil injection needle (15) protrudes from the connecting sleeve (5); A spring (2) is arranged in the installation cavity (16), and the spring (2) is sleeved on the periphery of the oil injection needle (15), and one end of the spring (2) is held in the installation cavity (16), and 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 press the spring (2) so as to move along its own axis.

3. The compressor oil injection structure according to claim 2, characterized in that: The installation cavity (16) comprises a first cavity (161) and a second cavity (162) which are connected to each other, and the second cavity (162) is coaxially arranged with the first cavity (161); The oil injection needle (15) comprises a first needle body (152) and a second needle body (154) which are connected to each other, the first needle body (152) is arranged in the first cavity (161), and the second needle body (154) is arranged in the second cavity (162); The spring (2) is disposed in the second cavity (162) and is located outside the second needle (154); A limit bearing (17) is arranged in the first cavity (161), and a limit ring (153) is arranged at the junction of the first needle body (152) and the second needle body (154). The limit ring (153) and the limit bearing (17) are arranged opposite to each other, and the limit bearing (17) is used to limit the movement of the limit ring (153).

4. The compressor oil injection structure according to claim 3, characterized in that: The vacuum port (14) is arranged 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).

5. The compressor oil injection structure according to claim 3, characterized in that: The gun body (1) further comprises a connecting seat (12), the connecting seat (12) being connected to the first cavity (161), the oil filling port (11) being arranged on the connecting seat (12), and the oil filling port (11) being in communication with the first needle (152); The connecting seat (12) is provided with a solenoid valve (3), and the solenoid valve (3) is used to control the connection and disconnection between the oil filling port (11) and the first needle body (152).

6. The compressor oil injection structure according to claim 5, characterized in that: The connection seat (12) is provided with an air outlet (13), and the air outlet is communicated with the first needle body (152).

7. The compressor oil injection structure according to any one of claims 2 to 6, 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 on the periphery of the oil injection needle (15), and the second sealing ring (52) is arranged close to the oil outlet (151), and the first sealing ring (51) is located on a side of the second sealing ring (52) away from the oil outlet (151); The inner diameter of the second sealing ring (52) is greater than the inner diameter of the first sealing ring (51).

8. The compressor oil injection structure according to claims 1-6, characterized in that: The gun body (1) further comprises a connection structure (4), wherein the connection structure (4) comprises a connection flange (43) and a connection column (41), wherein the connection flange (43) is arranged on one side of the gun body (1), a mounting base plate (6) is arranged on the gun body (1), and the connection flange (43) is fixedly connected to the mounting base plate (6) via the connection column (41); The connecting flange (43) is provided with a connecting hole (431).

9. The compressor oil injection structure according to claim 8, characterized in that: The connection structure (4) further comprises a connection plate (42), the connection flange (43) being fixed in the connection plate (42), a plurality of connection columns (41) being provided, and the plurality of connection columns (41) being fixedly connected to the connection plate (42); The connecting plate (42) is also provided with a locking structure (421), and the locking structure (421) is arranged at one end of the connecting hole (431) and extends into the connecting hole (431).

10. A compressor oil injection method, characterized in that: The method is implemented by using the compressor oil injection structure as described in any one of claims 1 to 9; The method comprises the following steps: Obtain the vacuum degree in the compressor; When the vacuum degree in the compressor exceeds a set threshold, the oil injection needle (15) is controlled to move so that the oil outlet (151) is connected to the vacuum port (14), and the vacuum device is started to perform a vacuum operation on the compressor; When the vacuum degree in the compressor is less than the set threshold, vacuuming stops; The oil injection needle (15) is controlled to move so that the oil outlet (151) is connected to the oil injection port (11) to inject oil into the compressor.

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