Diaphragm compressor oil spilling system and control method thereof

Abstract

The invention discloses an oil spilling system of a diaphragm compressor and a control method of the oil spilling system, and belongs to the technical field of diaphragm compressors, and the system comprises the diaphragm compressor which comprises a box body, a middle body and a cylinder body which are connected in sequence; the one-way throttle valve is mounted on a hydraulic oil pipeline of the cylinder body; an exhaust main pipe communicated with the cylinder body is connected with an exhaust pressure sensor and an exhaust pressure gauge; the oil overflow pipeline comprises an electromagnetic follow-up valve and a manual unloading valve which are connected in parallel; the pressure tapping pipeline is connected with an oil discharge pressure sensor and an oil discharge pressure gauge; the control equipment is used for adjusting the driving current in the electromagnetic follow-up valve through a closed-loop control algorithm to realize dynamic tracking of the actual value to the target value of the oil discharge pressure; according to the design, the one-way damping characteristic of the one-way throttle valve is utilized, and precise control over the oil spill pressure is achieved; meanwhile, by the adoption of the electromagnetic follow-up valve of a novel structure, complete isolation between hydraulic oil and compressed working medium gas is achieved, and the function of an automatic unloading valve is integrated.

Description

Technical Field

[0001] The present invention belongs to the technical field of diaphragm compressors, and particularly relates to an oil overflow system of a diaphragm compressor and a control method thereof. Background Art

[0002] A diaphragm compressor is a positive displacement compressor. Through the reciprocating motion of a piston, hydraulic oil is pushed. When exhausting, the hydraulic oil pushes the diaphragm in the diaphragm cavity to bulge towards the gas cavity side, and the gas is compressed through the diaphragm; when inhaling, the piston moves towards the lower dead center, and the diaphragm in the diaphragm cavity bulges towards the hydraulic oil side under the action of the intake pressure to complete inhalation. When designing a diaphragm compressor, the volume of the diaphragm cavity is slightly larger than the stroke volume of the piston. In this way, when the piston moves to the lower dead center, there is still an oil pad between the diaphragm and the oil side to prevent the diaphragm from slapping the cylinder during inhalation.

[0003] Since the hydraulic oil will inevitably leak from the sealing parts such as the piston and the cylinder sleeve when the diaphragm compressor is working, the diaphragm compressor is equipped with a make-up oil pipeline to replenish oil to the oil cavity. Since it is difficult for the make-up oil volume to be exactly the same as the leakage volume, an oil overflow pipeline is generally also equipped to make the excess oil overflow to prevent overpressure. The make-up oil and oil overflow systems are the most basic oil pipeline configurations of diaphragm compressors. Usually, the oil overflow system of a diaphragm compressor is composed of a follow-up valve and a relief valve, and pipeline accessories such as a check valve and an automatic relief valve are configured. However, the existing oil overflow systems have the following problems:

[0004] I. The problem of "false oil pressure": In the traditional oil overflow control system of a diaphragm compressor, due to the pulsation of the hydraulic oil and the unreasonable pipeline design, the measured oil pressure value is often not the true instantaneous maximum pressure, that is, there is a so-called "false oil pressure" phenomenon. This not only affects the accurate judgment of the actual operating state of the system, but also may lead to insufficient protection of the key components of the compressor, thereby affecting the service life of the equipment;

[0005] II. The mixing of hydraulic oil and compressed working medium gas: In the design of some diaphragm compressors, there is a lack of effective isolation measures between the hydraulic oil and the compressed working medium gas, resulting in the mixing of the gas and the hydraulic oil. This not only reduces the compression efficiency, but also may pollute the hydraulic system and increase the maintenance difficulty;

[0006] III. The limitation of oil overflow pressure control: Most of the existing oil overflow control systems adopt an open-loop control method, that is, they are controlled according to a preset pressure value, lacking the ability to respond to and adjust the actual operating conditions in real time;

[0007] In view of the deficiencies of the prior art, the present invention provides an oil overflow system of a diaphragm compressor and a control method thereof, aiming to solve the above problems. Summary of the Invention

[0008] The purpose of the present invention is to overcome the deficiencies in the prior art and provide an oil spill system for a diaphragm compressor and its control method. By utilizing the one-way damping characteristic of the one-way throttle valve, the present invention can achieve precise control of the oil spill pressure. At the same time, by adopting an electromagnetic servo valve with a new structure, it can not only completely isolate the hydraulic oil from the compressed working medium gas but also integrate the function of an automatic unloading valve.

[0009] To achieve the above object, in a first aspect, the present invention provides an oil spill system for a diaphragm compressor, the system comprising:

[0010] A diaphragm compressor, including a box body, a middle body, and a cylinder body connected in sequence;

[0011] A one-way throttle valve, installed on the hydraulic oil pipeline of the cylinder body; the cylinder body is also respectively connected to an intake main pipe and an exhaust main pipe, and the exhaust main pipe is connected to an exhaust pressure sensor and an exhaust pressure gauge;

[0012] An oil spill pipeline, including a parallel connection of an electromagnetic servo valve and a manual unloading valve, and the parallel output end of the oil spill pipeline is connected to the middle body;

[0013] A pressure-taking pipeline, connected to an oil discharge pressure sensor and an oil discharge pressure gauge, for real-time monitoring of the extreme value of the oil pressure;

[0014] And a control device, configured to generate an oil discharge pressure target value according to the read exhaust pressure value, and adjust the driving current inside the electromagnetic servo valve through a closed-loop control algorithm to achieve dynamic tracking of the actual value of the oil discharge pressure to the target value;

[0015] The electromagnetic servo valve, the oil discharge pressure sensor, and the exhaust pressure sensor are all electrically connected to the control device.

[0016] In combination with the first aspect, the electromagnetic servo valve includes:

[0017] A proportional electromagnet;

[0018] A lower valve body, with a hydraulic oil chamber and a valve core in the middle, an oil inlet channel opened on the right side, a sealing plunger hole provided at the top, and a valve disc installed at the bottom; an oil spill plunger hole is provided inside the valve disc; the valve core forms a paired seal with the oil spill plunger hole and the sealing plunger hole respectively, and the valve core slides up and down relative to the lower valve body;

[0019] An upper valve body, whose top and bottom are respectively connected to the proportional electromagnet and the lower valve body through fasteners; a leakage oil chamber is provided in the middle of the upper valve body, and a lower spring seat, a spring, and an upper spring seat are installed in the leakage oil chamber; the lower spring seat is threadedly connected to the valve core.

[0020] In combination with the first aspect, the electromagnetic servo valve controls the oil spill pressure by adjusting the current of the proportional electromagnet to push the valve core.

[0021] Combined with the first aspect, the one-way throttle valve has a one-way conduction function, which is used to dynamically capture the extreme value of hydraulic pulsation at a set frequency in the cylinder and form a steady state in the rear pipeline; the reverse throttle damping characteristic of the one-way throttle valve is used to realize the real-time synchronization of the pipeline pressure and the dynamic pressure in the cylinder within a set time when the cylinder pressure fluctuation decays.

[0022] Combined with the first aspect, a gland is also installed at the bottom of the lower valve body, and the valve disc is fixed to the bottom of the lower valve body through threaded connection; the gland is provided with an oil drain channel.

[0023] Combined with the first aspect, the bottom of the valve core is in the shape of a triangular petal.

[0024] Combined with the first aspect, the electro-magnetic servo valve further includes a plurality of sealing rings, and each of the sealing rings is respectively arranged at the connection between the gland and the lower valve body, the connection between the upper valve body and the proportional electromagnet, and the connection between the upper valve body and the lower valve body.

[0025] In a second aspect, the present invention provides an oil spill control method for a diaphragm compressor; the control method includes the following steps;

[0026] S1: Obtain the exhaust pressure value of the exhaust pressure sensor;

[0027] S2: According to the exhaust pressure value, obtain the target value of the oil discharge pressure under the current working condition according to a preset mapping relationship;

[0028] S3: Compare the target value of the oil discharge pressure with the oil discharge pressure value real-time fed back by the oil discharge pressure sensor, and analyze the dynamic deviation between the two;

[0029] S4: Adopt a closed-loop control algorithm, and generate a compensation instruction according to the deviation between the real-time fed back oil discharge pressure value and the target value of the oil discharge pressure;

[0030] S5: By adjusting the driving current of the proportional electromagnet, control the opening and closing of the electro-magnetic servo valve, so as to adjust the oil spill amount and make the actual value of the oil discharge pressure dynamically track the target value.

[0031] In a third aspect, the present invention provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the steps of the control method as described in the second aspect are realized.

[0032] In a fourth aspect, the present invention provides an oil spill control device for a diaphragm compressor, including:

[0033] A memory for storing instructions;

[0034] A processor for executing the instructions, so that the device executes the steps of the control method as described in the second aspect.

[0035] Compared with the prior art, the beneficial effects achieved by the present invention are as follows:

[0036] 1. By adopting the design of a one-way throttle valve in cooperation with a pressure-taking pipeline, the present invention can accurately capture the extreme values of hydraulic pulsations in the cylinder. The one-way conduction function of the one-way throttle valve ensures that the hydraulic oil can only flow in one direction, preventing the generation of bubbles and the reversal of flow, thereby forming a steady-state pressure in the pipeline. In addition, the reverse throttle damping characteristic of the one-way throttle valve can quickly achieve real-time synchronization of the pipeline pressure and the dynamic pressure in the cylinder when the pressure fluctuation in the cylinder decays, ensuring that the real extreme oil pressure is monitored by the oil discharge pressure sensor in real time. This improvement solves the "false oil pressure" problem in the traditional solution and improves the accuracy and reliability of system monitoring.

[0037] 2. The electromagnetic follow-up valve in the present invention adopts a special structural design. By controlling the movement of the valve core with a proportional electromagnet, it can flexibly open or close the oil spill channel under different pressures, thereby controlling the amount of hydraulic oil spilled. More importantly, the design of the electromagnetic follow-up valve ensures complete isolation between the hydraulic oil and the compressed working medium gas, preventing the mixing of gas and hydraulic oil and improving the safety and stability of the system. In addition, the electromagnetic follow-up valve can be used as an automatic unloading valve when the compressor starts. By losing power, the valve core slides upward under the action of oil pressure to open the overflow channel, unload the oil pressure in the cylinder, reduce the starting resistance torque, and realize the automatic unloading function during startup.

[0038] 3. The oil spill system of the present invention adopts a closed-loop control algorithm. By adjusting the drive current of the proportional electromagnet, it controls the opening and closing of the electromagnetic follow-up valve, thereby accurately adjusting the amount of oil spilled and enabling the actual value of the oil discharge pressure to dynamically track the target value. This closed-loop control method not only improves the accuracy of oil discharge pressure control but also has the ability of automatic correction and compensation, can adapt to different working conditions, and ensures that the system always operates in the best state. Brief Description of the Drawings

[0039] Figure 1 is a schematic structural diagram of the oil spill system of the present invention.

[0040] Figure 2 is a cross-sectional view of the electromagnetic follow-up valve of the present invention.

[0041] Figure 3 is a schematic structural diagram of the valve core of the present invention.

[0042] Wherein:

[0043] 1. Diaphragm compressor; 11. Box body; 12. Middle body; 13. Cylinder block; 2. One-way throttle valve; 3. Oil spill pipeline; 31. Electromagnetic servo valve; 311. Proportional electromagnet; 312. Upper valve body; 312a. Leakage oil cavity; 313. Lower valve body; 314. Hydraulic oil cavity; 315. Valve disc; 316. Gland; 316a. Oil drain channel; 317. Sealing ring; 318. Oil replenishing ring; 319. Valve core; 319a. Boss; 319b. Through hole; 320. Lower spring seat; 321. Spring; 322. Upper spring seat; 323. Sealing plunger hole; 324. Oil spill plunger hole; 325. Oil inlet channel; 32. Manual unloading valve; 4. Pressure taking pipeline; 41. Oil drain pressure sensor; 42. Oil drain pressure gauge; 43. Exhaust pressure sensor; 44. Exhaust pressure gauge; 5. Control equipment; 6. Intake main pipe; 7. Exhaust main pipe. Detailed implementation mode

[0044] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention and cannot be used to limit the protection scope of the present invention.

[0045] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "middle", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, in the description of the present invention, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0046] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood through specific situations.

[0047] Embodiment 1

[0048] Refer to Figures 1 - 3 , this embodiment provides an oil spill system for a diaphragm compressor, and the system includes:

[0049] A diaphragm compressor 1, including a box body 11, a middle body 12 and a cylinder block 13 connected in sequence;

[0050] One-way throttle valve 2 is installed on the hydraulic oil pipeline of the cylinder block 13; the cylinder block 13 is also respectively connected to an intake main pipe 6 and an exhaust main pipe 7, and the exhaust main pipe 7 is connected with an exhaust pressure sensor 43 and an exhaust pressure gauge 44;

[0051] Oil spill pipeline 3 includes a parallel-connected electro-hydraulic servo valve 31 and a manual unloading valve 32, and the parallel output end of the oil spill pipeline 3 is connected to the middle body 12; the manual unloading valve 32 is used to start unloading during on-site manual control.

[0052] Pressure tapping pipeline 4 is connected with an oil discharge pressure sensor 41 and an oil discharge pressure gauge 42, and is used to monitor the extreme value of oil pressure in real time;

[0053] And a control device 5, which is used to generate an oil discharge pressure target value according to the read exhaust pressure value, and adjust the drive current inside the electro-hydraulic servo valve 31 through a closed-loop control algorithm to realize the dynamic tracking of the actual value of the oil discharge pressure to the target value;

[0054] The electro-hydraulic servo valve 31, the oil discharge pressure sensor 41 and the exhaust pressure sensor 43 are all electrically connected to the control device 5.

[0055] Specifically, the electro-hydraulic servo valve 31 includes:

[0056] A proportional electro-magnet 311; the proportional electro-magnet 311 component is a conventional electrical control element, and no redundant description will be made here.

[0057] Lower valve body 313, with a hydraulic oil chamber 314 and a valve core 319 in the middle, an oil inlet channel 325 opened on the right side, a sealing plunger hole 323 on the top, and a valve disc 315 installed at the bottom; an oil spill plunger hole 324 is provided in the valve disc 315; the valve core 319 forms a paired seal with the oil spill plunger hole 324 and the sealing plunger hole 323 respectively, and the valve core 319 slides up and down relative to the lower valve body 313;

[0058] Upper valve body 312, whose top and bottom are respectively connected to the proportional electro-magnet 311 and the lower valve body 313 through fasteners; a leakage oil chamber 312a is provided in the middle of the upper valve body 312, and a lower spring seat 320, a spring 321 and an upper spring seat 322 are installed in the leakage oil chamber 312a; the lower spring seat 320 is threadedly connected to the valve core 319.

[0059] In order to increase the lubrication degree of the cylinder wall, in this embodiment, an oil replenishing ring 318 is also installed in the middle of the lower valve body 313.

[0060] Furthermore, the electro-hydraulic servo valve 31 controls the oil spill pressure by adjusting the current of the proportional electro-magnet 311 to push the valve core 319.

[0061] It should be noted that in this embodiment, the hydraulic oil in the cylinder block 13 is led out to the oil spill pipeline 3 and the pressure taking pipeline 4 through the one-way throttle valve 2. Since the one-way throttle valve 2 has a one-way conduction function, it can capture the extreme value of the hydraulic pulsation in the cylinder block 13 at about 10 Hz and form a steady state in the rear pipeline; based on the reverse throttling damping characteristic of the one-way throttle valve 2, when the pressure fluctuation decays (such as after the working condition is switched), the pipeline pressure and the in-cylinder dynamic pressure can be synchronized in real time in the cylinder block 13 within about 1 second. This pressure taking mechanism solves the "false oil pressure" problem of the traditional scheme.

[0062] Furthermore, a gland 316 is also installed at the bottom of the lower valve body 313, and the gland 316 fixes the valve disc 315 at the bottom of the lower valve body 313 through threaded connection; the gland 316 is provided with an oil drain channel 316a.

[0063] It should be noted that in this embodiment, the bottom of the valve core 319 is in the shape of a triangular prism petal, and a through hole 319b serving as the oil drain channel 316a is opened at the center of the triangular prism petal shape, and the boss 319a is arranged above the triangular prism petal shape.

[0064] It should be noted that during the control process of this embodiment, when the valve core 319 slides downward until its boss 319a is lower than the plane of the valve disc 315, the oil spill channel is closed; when the valve core 319 slides upward until its boss 319a is higher than the plane of the valve disc 315, the oil spill channel is opened to complete oil drainage; the triangular prism petal at the bottom of the valve core 319 is always in the oil spill plunger hole 324 during the sliding of the valve core 319 to maintain the guiding function.

[0065] It should be noted that in this embodiment, the inside of the valve core 319 is a hollow structure. This design can drain the small amount of hydraulic oil leaked from the hydraulic oil cavity 314 along the sealing plunger hole 323 to the low-pressure leakage cavity into the bottom oil drain channel 316a; since the area of the oil spill plunger hole 324 on the bottom side of the valve core 319 is smaller than that of the top sealing plunger hole 323, under the action of the oil pressure, the valve core 319 will move upward. When the electromagnetic force F = the oil pressure P(A2 - A1) is in a balanced state, when the oil pressure P ≥ F / (A2 - A1), the valve core 319 slides upward to complete oil spill.

[0066] Wherein, A1 and A2 respectively represent the areas of the oil spill plunger hole 324 and the sealing plunger hole 323, and (A2 - A1) represents the difference in the areas of the two holes. Since the electromagnetic force in the balanced state is calculated based on the difference in the sealing areas at both ends of the valve core 319, compared with the traditional structure using the same specification proportional electromagnet 311, this scheme can match a higher oil spill pressure and channel area.

[0067] On the other hand, the traditional electromagnetic servo valve 31 with a valve head-valve seat sealing structure has a high oil pressure sealing problem: limited by the electromagnetic force of the electromagnet, the pressure per unit area of the sealing surface is insufficient, resulting in the specific pressure value being difficult to meet the sealing requirements under high-pressure conditions. The triangular petal-shaped sliding valve core 319 adopted in this solution realizes the radial closing of the overflow channel by the downward sliding of the valve core 319, avoiding the problem of insufficient specific pressure on the sealing surface and effectively improving the sealing reliability.

[0068] In addition, when the compressor starts, the proportional electromagnet 311 loses power, and the valve core 319 will slide upward under the action of oil pressure to open the overflow channel. At this time, the electromagnetic servo valve 31 can also be used as an automatic unloading valve.

[0069] For example, this design is different from the existing patent of the electromagnetic servo valve 31 and its control system for a high-pressure diaphragm compressor 1 with the application number 202111069580.6. Figure 2 The electromagnetic servo valve 31 calculates the electromagnetic force through the difference in the sealing areas at both ends of the valve core 319 and adopts Figure 3 a sliding valve core 319 with a triangular petal-shaped radial sealing structure to avoid the problem of specific pressure on the valve seat sealing surface. Therefore, the opening and closing of the servo valve under high-pressure or large-flow conditions can be controlled by a relatively small electromagnetic force.

[0070] To enhance the sealing performance of the system, in this embodiment, the electromagnetic servo valve 31 further includes a plurality of sealing rings 317, and each of the sealing rings 317 is respectively arranged at the connection between the gland 316 and the lower valve body 313, the connection between the upper valve body 312 and the proportional electromagnet 311, and the connection between the upper valve body 312 and the lower valve body 313.

[0071] Embodiment 2

[0072] Based on Embodiment 1, this embodiment provides a method for controlling oil spillage of a diaphragm compressor; the control method includes the following steps;

[0073] S1: Obtain the exhaust pressure value of the exhaust pressure sensor 43;

[0074] S2: According to the exhaust pressure value, obtain the target value of the oil discharge pressure under the current working condition according to the preset mapping relationship;

[0075] S3: Compare the target value of the oil discharge pressure with the oil discharge pressure value real-time feedback by the oil discharge pressure sensor 41, and analyze the dynamic deviation between the two;

[0076] S4: Adopt a closed-loop control algorithm to generate a compensation instruction according to the deviation between the real-time feedback oil discharge pressure value and the target value of the oil discharge pressure;

[0077] S5: By adjusting the driving current of the proportional solenoid 311, control the opening and closing of the electromagnetic servo valve 31, thereby adjusting the oil overflow amount, so that the actual value of the oil discharge pressure dynamically tracks the target value.

[0078] Preferably, in this embodiment, the closed-loop control algorithm includes a PID control algorithm, which is used to dynamically adjust the driving current of the proportional solenoid 311 according to the deviation between the real-time feedback value and the target value to achieve precise oil pressure control.

[0079] Embodiment Three

[0080] Based on Embodiment Two, this embodiment provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the steps of the control method described in Embodiment Two are implemented.

[0081] Embodiment Four

[0082] Based on Embodiment Two, the present invention provides an oil overflow control device for a diaphragm compressor, including:

[0083] A memory for storing instructions;

[0084] A processor for executing the instructions, so that the device executes the steps of the control method described in Embodiment Two.

[0085] In summary, the oil overflow system of the diaphragm compressor 1 of the present invention realizes precise control of the oil pressure through a series of structural optimizations and improvements of the control method, improves the reliability and safety of the system, reduces the maintenance cost, and enhances the automation and intelligence level of the system. These beneficial effects significantly improve the performance and operating efficiency of the diaphragm compressor 1 and meet the requirements of modern industry for high-efficiency, energy-saving, and environmentally friendly diaphragm compressors 1.

[0086] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and deformations can be made, and these improvements and deformations should also be regarded as the protection scope of the present invention.

Claims

1. An oil spill system for a diaphragm compressor, characterized in that, Comprising: A diaphragm compressor (1), including a housing (11), a middle body (12), and a cylinder block (13) connected in sequence; A one-way throttle valve (2), installed on the hydraulic oil pipeline of the cylinder block (13); the cylinder block (13) is also respectively connected to an intake main pipe (6) and an exhaust main pipe (7), and the exhaust main pipe (7) is connected to an exhaust pressure sensor (43) and an exhaust pressure gauge (44); An oil spill pipeline (3), including a parallel-connected electromagnetic servo valve (31) and a manual unloading valve (32), and the parallel output end of the oil spill pipeline (3) is connected to the middle body (12); A pressure-taking pipeline (4), connected to an oil discharge pressure sensor (41) and an oil discharge pressure gauge (42), for real-time monitoring of the extreme value of oil pressure; And a control device (5), configured to generate an oil discharge pressure target value according to the read exhaust pressure value, and adjust the driving current inside the electromagnetic servo valve (31) through a closed-loop control algorithm to achieve the dynamic tracking of the actual value of the oil discharge pressure to the target value; The electromagnetic servo valve (31), the oil discharge pressure sensor (41), and the exhaust pressure sensor (43) are all electrically connected to the control device (5).

2. The oil spill system of the diaphragm compressor according to claim 1, characterized in that, The electromagnetic servo valve (31) includes: A proportional electromagnet (311); A lower valve body (313), with a hydraulic oil cavity (314) and a valve core (319) in the middle, an oil inlet channel (325) on the right side, a sealing plunger hole (323) at the top, and a valve disc (315) installed at the bottom; an oil spill plunger hole (324) is provided inside the valve disc (315); the valve core (319) forms a paired seal with the oil spill plunger hole (324) and the sealing plunger hole (323) respectively, and the valve core (319) slides up and down relative to the lower valve body (313); An upper valve body (312), whose top and bottom are respectively connected to the proportional electromagnet (311) and the lower valve body (313) through fasteners; a leakage oil cavity (312a) is provided in the middle of the upper valve body (312), and a lower spring seat (320), a spring (321), and an upper spring seat (322) are installed in the leakage oil cavity (312a); the lower spring seat (320) is threadedly connected to the valve core (319).

3. The oil spill system of the diaphragm compressor according to claim 2, characterized in that, The electromagnetic servo valve (31) controls the oil spill pressure by adjusting the current of the proportional electromagnet (311) to push the valve core (319).

4. The oil spill system of the diaphragm compressor according to claim 1, characterized in that, The one-way throttle valve (2) has a one-way conduction function, used to dynamically capture the extreme value of hydraulic pulsation at a set frequency in the cylinder and form a steady state in the rear pipeline; the reverse throttle damping characteristic of the one-way throttle valve (2) is used to achieve real-time synchronization of the pipeline pressure and the dynamic pressure in the cylinder block (13) within a set time when the cylinder pressure fluctuates and decays.

5. The oil spill system of the diaphragm compressor according to claim 2, characterized in that, A gland (316) is also installed at the bottom of the lower valve body (313), and the gland (316) fixes the valve disc (315) at the bottom of the lower valve body (313) through threaded connection; the gland (316) is provided with an oil discharge channel (316a).

6. The oil spill system of the diaphragm compressor according to claim 2, characterized in that, The bottom of the valve core (319) is in the shape of a triangular petal.

7. The oil spill system of the diaphragm compressor according to claim 5, characterized in that The electromagnetic servo valve (31) further includes a plurality of sealing rings (317), and each of the sealing rings (317) is respectively disposed at the connection between the gland (316) and the lower valve body (313), the connection between the upper valve body (312) and the proportional electromagnet (311), and the connection between the upper valve body (312) and the lower valve body (313).

8. A method for controlling oil spillage of a diaphragm compressor, based on the oil spillage system of the diaphragm compressor according to any one of claims 1-7, characterized in that, The control method includes the following steps: S1: Obtain the exhaust pressure value of the exhaust pressure sensor (43); S2: According to the exhaust pressure value, obtain the target value of the oil discharge pressure under the current working condition according to the preset mapping relationship; S3: Compare the target value of the oil discharge pressure with the oil discharge pressure value feedback by the oil discharge pressure sensor (41) in real time, and analyze the dynamic deviation between the two; S4: Adopt a closed-loop control algorithm, and generate a compensation instruction according to the deviation between the oil discharge pressure value feedback in real time and the target value of the oil discharge pressure; S5: By adjusting the drive current of the proportional electromagnet (311), control the opening and closing of the electromagnetic servo valve (31), so as to adjust the oil spillage amount, and make the actual value of the oil discharge pressure dynamically track the target value.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, the steps of the oil spillage control method of the diaphragm compressor as described in claim 8 are implemented.

10. An oil spill control device for a diaphragm compressor, characterized in that, Including: A memory for storing instructions; A processor for executing the instructions, so that the device executes the steps of the oil spillage control method of the diaphragm compressor as described in claim 8.

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