Device and method for monitoring, regulating and controlling lubricating oil state of screw compressor unit

Abstract

The invention relates to the technical field of lubricating oil state monitoring, regulation and control, and discloses a screw compressor unit lubricating oil state monitoring, regulation and control device and method which comprises a screw compressor unit, a unit lubricating oil distributor, an oil tank, an oil pump, a monitoring box, a purification box and a controller. The unit lubricating oil distributor is provided with a lubricating oil input pipe and a lubricating oil output pipe; the oil tank is mounted on the oil tank frame, and an oil filling plug, a lubricating oil input valve, a cleaning manhole, a purified oil return valve, an oil gauge, an oil temperature gauge and an alarm are arranged on the oil tank; the monitoring box is mounted on the monitoring box frame, and an oil pressure sensor, an oil viscosity sensor, a metal particle sensor, an oil quality sensor and a moisture sensor are arranged on the monitoring box and are communicated with the interior of the monitoring box. The device is compact in structure, easy and convenient to operate and easy to maintain, reduces the operation cost of enterprises, and has wide application prospects and market value.

Description

Technical Field

[0001] This invention relates to the field of lubricating oil condition monitoring and control technology, specifically to a device and method for lubricating oil condition monitoring and control in screw compressor units. Background Technology

[0002] Screw compressor units, as key equipment in the industrial field, are widely used in various industries such as air conditioning and refrigeration, air compression, and industrial gas processing. Their stable operation is directly related to the continuity and energy efficiency of the production system. Lubricating oil in screw compressors plays important roles in lubrication, cooling, sealing, cleaning, and corrosion prevention, and its condition has a decisive impact on the unit's operating efficiency, service life, and failure rate.

[0003] However, during long-term operation, lubricating oil is affected by various factors such as temperature, pressure, metal wear particles, moisture intrusion, and oxidation, leading to a gradual degradation of its physical and chemical properties. Common abnormal lubricating oil conditions include viscosity changes, oil pressure fluctuations, increased metal particle content, excessive moisture, and oil aging. If these problems are not detected and addressed in a timely manner, they will cause accelerated equipment wear, increased energy consumption, and even sudden shutdowns, seriously affecting production safety and economic operation.

[0004] Currently, traditional lubricant maintenance methods mainly rely on periodic replacement and offline laboratory testing, which are not only cumbersome and costly, but also unable to achieve real-time status monitoring and timely adjustment, exhibiting certain lag and limitations.

[0005] Therefore, developing a device and method that can monitor multiple key indicators of lubricating oil in real time, automatically determine its status, and achieve intelligent purification and reflux is of great significance for improving the operational reliability of screw compressor units, reducing maintenance costs, and extending oil change intervals. Summary of the Invention

[0006] The purpose of this invention is to provide a device and method for monitoring and controlling the lubricating oil condition of a screw compressor unit, so as to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] A technical solution for a screw compressor unit lubricating oil condition monitoring and control device includes a screw compressor unit, a unit lubricating oil distributor, an oil tank, an oil pump, a monitoring box, a purification box, and a controller;

[0009] The unit's lubricating oil distributor is equipped with a lubricating oil inlet pipe and a lubricating oil outlet pipe;

[0010] The oil tank is installed on the oil tank frame and is equipped with an oil filling plug, a lubricating oil input valve, a cleaning manhole, a purified oil return valve, an oil level gauge, an oil temperature gauge, and an alarm.

[0011] The monitoring box is installed on the monitoring box frame. The monitoring box is equipped with an oil pressure sensor, an oil viscosity sensor, a metal particle sensor, an oil quality sensor, and a moisture sensor, and is connected to the inside of the monitoring box.

[0012] The monitoring box is also equipped with an output inlet valve, a pre-purification output valve, a purification pipe, an oil inlet valve, and an oil inlet pipe. The output inlet valve is connected to the lubricating oil output pipe and is used to connect the lubricating oil returning from the screw compressor unit. The two ends of the oil inlet pipe are connected to the oil inlet valve and the oil tank.

[0013] The purification box is installed on the purification box frame, and the purification box is equipped with a purification box inlet valve and a purification outlet valve;

[0014] The purification box is equipped with a primary magnetic filter, a primary impurity baffle, a secondary magnetic filter, a secondary impurity baffle, a baffle, a flow port, a porous filter element, an overflow baffle, an overflow port, and an activated carbon filling layer.

[0015] The controller is electrically connected to various sensors and valves to monitor the lubricating oil status in real time and control the opening and closing of the corresponding valves to achieve lubricating oil purification and reflux.

[0016] As a preferred technical solution, the fuel tank frame is provided with lifting lugs at the corners, and the cleaning manhole is used for cleaning the inside of the fuel tank.

[0017] As a preferred technical solution, the oil pump is installed on the oil tank and is used to pump lubricating oil into the unit's lubricating oil distributor through the lubricating oil inlet valve and the lubricating oil inlet pipe.

[0018] As a preferred technical solution, the monitoring box is connected to the purification box through a purification pipe, and the two ends of the purification pipe are respectively connected to the pre-purification output valve and the purification box input valve.

[0019] As a preferred technical solution, the purification box is connected to the oil inlet pipe via a purified output valve, and the oil inlet pipe is connected to the purified oil return valve.

[0020] As a preferred technical solution, the controller is connected to the oil temperature gauge and the alarm, and is used to issue an alarm signal when the oil temperature is abnormal.

[0021] As a preferred technical solution, the porous filter element and activated carbon filling layer inside the purification box are used to further filter and adsorb impurities and moisture in the lubricating oil.

[0022] As a preferred technical solution, the primary magnetic filter and the secondary magnetic filter are inclined and parallel to each other, used to filter metal particles and impurities in the lubricating oil, and to collect them by blocking them through the primary impurity block and the secondary impurity block.

[0023] A technical solution for monitoring and controlling the lubricating oil condition of a screw compressor unit includes the following steps:

[0024] S1. Real-time monitoring of lubricating oil pressure, viscosity, metal particles, oil quality, and moisture content using sensors inside the monitoring box;

[0025] S2. The controller determines the lubricating oil status based on sensor data and controls the opening of the pre-purification output valve and the purification box input valve to allow the lubricating oil to enter the purification box for purification.

[0026] S3. The purified lubricating oil flows back to the oil tank through the purified output valve and the oil tank inlet valve.

[0027] S4. If the lubricating oil is in normal condition, it will flow back to the unit's lubricating oil distributor directly through the output valve.

[0028] Compared with the prior art, the beneficial effects of the present invention are:

[0029] This invention relates to a device and method for monitoring and controlling the lubricating oil condition of a screw compressor unit. By monitoring the lubricating oil condition in real time, including key indicators such as oil pressure, viscosity, metal particle content, oil quality, and moisture content, it ensures that the lubricating oil performance is always at its optimal state. When abnormal lubricating oil conditions are detected, such as unstable oil pressure, viscosity changes, increased metal particles, or excessive moisture, the controller can respond quickly and automatically initiate a purification process to clean the lubricating oil. This solution features real-time monitoring, automatic purification, and efficient control, effectively preventing screw compressor unit failures caused by poor lubricating oil condition, extending equipment lifespan, and improving equipment operating efficiency. Furthermore, the device of this invention has a compact structure, is easy to operate and maintain, reduces enterprise operating costs, and has broad application prospects and market value. Attached Figure Description

[0030] Figure 1 A schematic diagram of the overall structure of a lubricating oil condition monitoring and control device and method for a screw compressor unit;

[0031] Figure 2 A schematic diagram of the front structure of the oil tank in a screw compressor unit lubricating oil condition monitoring and control device and method;

[0032] Figure 3 A schematic diagram of the back structure of the oil tank in a screw compressor unit lubricating oil condition monitoring and control device and method;

[0033] Figure 4 A schematic diagram of the monitoring box structure of a lubricating oil condition monitoring and control device and method for a screw compressor unit;

[0034] Figure 5This is a schematic diagram of the cross-sectional structure of the purification box in a screw compressor unit lubricating oil condition monitoring and control device and method.

[0035] In the attached diagram, the following are the reference numerals: 1. Screw compressor unit; 2. Unit lubricating oil distributor; 21. Lubricating oil inlet pipe; 22. Lubricating oil outlet pipe; 3. Oil tank frame; 301. Lifting lug; 31. Oil tank; 32. Oil pump; 33. Filling plug; 34. Lubricating oil inlet valve; 35. Cleaning manhole; 36. Purified oil return valve; 37. Oil level gauge; 38. Oil temperature gauge and alarm; 4. Monitoring box frame; 41. Monitoring box; 411. Oil pressure sensor; 412. Oil viscosity sensor; 413. Metal particle sensor; 414. Oil quality sensor. 5. Moisture sensor; 42. Output inlet valve; 43. Pre-purification output valve; 44. Purification pipe; 45. Oil inlet valve; 46. Oil inlet pipe; 5. Purification box frame; 51. Purification box; 52. Purification box input valve; 53. Post-purification output valve; 541. Primary magnetic filter; 542. Primary impurity baffle; 551. Secondary magnetic filter; 552. Secondary impurity baffle; 561. Baffle; 562. Flow port; 57. Porous filter element; 581. Overflow baffle; 582. Overflow port; 59. Activated carbon filling layer; 6. Controller. Detailed Implementation

[0036] The features and exemplary embodiments of various aspects of the present invention will now be described in detail. To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. For those skilled in the art, the present invention can be practiced without some of these specific details. The following description of the embodiments is merely to provide a better understanding of the present invention by illustrating examples of the invention.

[0037] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the present invention provides a technical solution for a screw compressor unit lubricating oil condition monitoring and control device: including a screw compressor unit 1, a unit lubricating oil distributor 2, an oil tank 31, an oil pump 32, a monitoring box 41, a purification box 51, and a controller 6.

[0038] The unit's lubricating oil distributor 2 is equipped with a lubricating oil inlet pipe 21 and a lubricating oil outlet pipe 22, which are used to distribute lubricating oil to the screw compressor unit 1 and collect the returned lubricating oil.

[0039] The oil tank 31 is mounted on the oil tank frame 3, and the oil tank frame 3 has lifting lugs 301 at its corners for easy handling. The oil tank 31 is equipped with an oil filling plug 33 for adding lubricating oil; a lubricating oil inlet valve 34, connected to the oil pump 32, for pumping lubricating oil into the unit's lubricating oil distributor 2; a cleaning manhole 35 for cleaning the inside of the oil tank 31; a purified oil return valve 36 for returning purified lubricating oil; an oil level gauge 37 for displaying the amount of lubricating oil in the oil tank 31; and an oil temperature gauge and alarm 38 for monitoring the oil temperature and issuing an alarm signal when the oil temperature is abnormal.

[0040] The monitoring box 41 is mounted on the monitoring box frame 4. The monitoring box 41 is equipped with an oil pressure sensor 411, an oil viscosity sensor 412, a metal particle sensor 413, an oil quality sensor 414, and a moisture sensor 415, which are used to monitor the oil pressure, viscosity, metal particle content, oil quality, and moisture of the lubricating oil in real time. The monitoring box 41 is also equipped with an output inlet valve 42, which is connected to the lubricating oil output pipe 22, for receiving the lubricating oil returned from the screw compressor unit 1; a pre-purification output valve 43 and a purification pipe 44, for conveying the lubricating oil to the purification box 51 for purification; and an oil tank valve 45 and an oil tank pipe 46, with the two ends of the oil tank pipe 46 connected to the oil tank valve 45 and the oil tank 31, for returning the purified lubricating oil to the oil tank 31.

[0041] The purification box 51 is mounted on the purification box frame 5. The purification box 51 is equipped with a purification box inlet valve 52 and a purified output valve 53 for receiving the lubricating oil to be purified and outputting the purified lubricating oil. The purification box 51 contains a primary magnetic filter 541, a primary impurity baffle 542, a secondary magnetic filter 551, a secondary impurity baffle 552, a baffle 561, a flow port 562, a porous filter element 57, an overflow baffle 581, an overflow port 582, and an activated carbon filling layer 59. The primary magnetic filter 541 and the secondary magnetic filter 551 are inclined and parallel to each other, used to filter metal particles and impurities in the lubricating oil, which are then blocked and collected by the primary impurity baffle 542 and the secondary impurity baffle 552. The porous filter element 57 and the activated carbon filling layer 59 are used to further filter and adsorb impurities and moisture in the lubricating oil.

[0042] The controller 6 is electrically connected to various sensors and valves to monitor the lubricating oil status in real time and determine the lubricating oil status based on sensor data. It then controls the opening and closing of the corresponding valves to achieve lubricating oil purification and return. When an abnormal lubricating oil status is detected, such as unstable oil pressure, viscosity changes, increased metal particles, or excessive moisture, the controller 6 can respond quickly and automatically initiate the purification process to purify the lubricating oil. If the lubricating oil status is normal, the controller 6 controls the output valve 42 to open, allowing the lubricating oil to flow directly back to the unit's lubricating oil distributor 2.

[0043] The lubricating oil condition monitoring and control device for screw compressor units of the present invention monitors the condition of the lubricating oil in screw compressor unit 1 in real time, including key indicators such as oil pressure, viscosity, metal particle content, oil quality, and moisture content, ensuring that the performance of the lubricating oil is always at its optimal state. When an abnormal lubricating oil condition is detected, the controller 6 can respond quickly and automatically start the purification process to purify the lubricating oil, effectively avoiding screw compressor unit 1 failures caused by poor lubricating oil condition, extending the service life of the equipment, and improving the operating efficiency of the equipment. At the same time, the device of the present invention has a compact structure, is easy to operate and maintain, reduces the operating costs of enterprises, and has broad application prospects and market value.

[0044] A technical solution for monitoring and controlling the lubricating oil condition of a screw compressor unit includes the following steps:

[0045] S1. The lubricating oil pressure, viscosity, metal particles, oil quality and moisture are monitored in real time by the sensors in the monitoring box 41;

[0046] S2, the controller 6 determines the state of the lubricating oil based on the sensor data, and controls the opening of the pre-purification output valve 43 and the purification box input valve 52 to allow the lubricating oil to enter the purification box 51 for purification.

[0047] S3. The purified lubricating oil flows back to the oil tank 31 through the purified output valve 53 and the oil tank inlet valve 45.

[0048] S4. If the lubricating oil is in normal condition, it will flow directly back to the unit's lubricating oil distributor 2 through the output valve 42.

[0049] The working principle and usage process of this invention: During normal operation, the lubricating oil circulates within the screw compressor unit 1. First, the lubricating oil is pumped from the oil tank 31 to the unit's lubricating oil distributor 2 via the oil pump 32. The distributor 2 distributes the lubricating oil to various lubrication points of the screw compressor unit 1 for lubrication. Simultaneously, the returning lubricating oil within the unit 1 flows back to the monitoring box 41 through the lubricating oil output pipe 22.

[0050] Inside the monitoring box 41, various sensors monitor the lubricating oil's pressure, viscosity, metal particle content, oil quality, and moisture content in real time. This monitoring data is transmitted to the controller 6 in real time, which determines the lubricating oil's condition based on preset thresholds and algorithms.

[0051] When the controller 6 detects an abnormal condition in the lubricating oil, such as unstable oil pressure, viscosity exceeding the normal range, excessive metal particle content, or excessive moisture content, the controller 6 will automatically start the purification process. At this time, the controller 6 controls the pre-purification output valve 43 and the purification box input valve 52 to open, allowing the abnormal lubricating oil to enter the purification box 51 for purification treatment.

[0052] Inside the purification box 51, the lubricating oil undergoes preliminary filtration by passing through a primary magnetic filter 541, a primary impurity baffle 542, a secondary magnetic filter 551, and a secondary impurity baffle 552, removing metal particles and impurities. Subsequently, the lubricating oil flows through a porous filter element 57 and an activated carbon-filled layer 59 for further filtration and adsorption, removing minute impurities and moisture. The purified lubricating oil flows out of the purification box 51 through the purified output valve 53 and returns to the oil tank 31 via the oil inlet valve 45 and the oil inlet pipe 46 for reuse.

[0053] If the controller 6 detects that the lubricating oil is in normal condition, the controller 6 controls the output valve 42 to open, so that the lubricating oil flows directly back to the unit's lubricating oil distributor 2 and continues to participate in the unit's lubrication cycle.

[0054] The screw compressor unit lubricating oil condition monitoring and control device and method of the present invention can realize real-time monitoring and purification of the screw compressor unit lubricating oil, ensuring that the performance of the lubricating oil is always in the best condition, effectively avoiding unit failure caused by poor lubricating oil condition, extending the service life of the equipment, and improving the operating efficiency and reliability of the equipment.

[0055] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

[0056] In the description of this invention, it should be understood that the terms "coaxial," "bottom," "one end," "top," "middle," "other end," "upper," "side," "top," "inner," "front," "center," "both ends," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0057] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "setting," "connection," "fixing," "screw connection," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0058] The embodiments described above are not exhaustive and do not limit the invention to specific implementations. Clearly, many modifications and variations can be made based on the above description. These embodiments are selected and specifically described in this specification to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to effectively utilize the invention and its modifications. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the invention should be included within the scope of protection of the invention.

Claims

1. A lubricating oil condition monitoring and control device for a screw compressor unit, characterized in that, It includes a screw compressor unit (1), a unit lubricating oil distributor (2), an oil tank (31), an oil pump (32), a monitoring box (41), a purification box (51), and a controller (6); The unit's lubricating oil distributor (2) is equipped with a lubricating oil inlet pipe (21) and a lubricating oil outlet pipe (22); The oil tank (31) is installed on the oil tank frame (3). The oil tank (31) is equipped with an oil filling plug (33), a lubricating oil input valve (34), a cleaning manhole (35), a purification oil return valve (36), an oil level gauge (37), an oil temperature gauge, and an alarm (38). The monitoring box (41) is installed on the monitoring box frame (4). The monitoring box (41) is equipped with an oil pressure sensor (411), an oil viscosity sensor (412), a metal particle sensor (413), an oil quality sensor (414), and a moisture sensor (415), and is connected to the inside of the monitoring box (41). The monitoring box (41) is also equipped with an output inlet valve (42), a pre-purification output valve (43), a purification pipe (44), an oil tank valve (45), and an oil tank pipe (46). The output inlet valve (42) is connected to the lubricating oil output pipe (22) and is used to connect the lubricating oil returning from the screw compressor unit (1). The two ends of the oil tank pipe (46) are connected to the oil tank valve (45) and the oil tank (31). The purification box (51) is installed on the purification box frame (5), and the purification box (51) is equipped with a purification box inlet valve (52) and a purification outlet valve (53); The purification box (51) is equipped with a primary magnetic filter (541), a primary impurity baffle (542), a secondary magnetic filter (551), a secondary impurity baffle (552), a baffle (561), a flow port (562), a porous filter element (57), an overflow baffle (581), an overflow port (582), and an activated carbon filling layer (59). The controller (6) is electrically connected to each sensor and valve to monitor the lubricating oil status in real time and control the opening and closing of the corresponding valves to achieve the purification and reflux of the lubricating oil.

2. The lubricating oil condition monitoring and control device for a screw compressor unit according to claim 1, characterized in that: The oil tank frame (3) is provided with lifting lugs (301) at the corners, and the cleaning manhole (35) is used for cleaning the inside of the oil tank (31).

3. The lubricating oil condition monitoring and control device for a screw compressor unit according to claim 2, characterized in that: The oil pump (32) is installed on the oil tank (31) and is used to pump lubricating oil into the unit's lubricating oil distributor (2) through the lubricating oil inlet valve (34) and the lubricating oil inlet pipe (21).

4. The lubricating oil condition monitoring and control device for a screw compressor unit according to claim 3, characterized in that: The monitoring box (41) is connected to the purification box (51) through the purification pipe (44), and the two ends of the purification pipe (44) are respectively connected to the pre-purification output valve (43) and the purification box input valve (52).

5. The lubricating oil condition monitoring and control device for a screw compressor unit according to claim 4, characterized in that: The purification box (51) is connected to the oil inlet pipe (46) through the purified output valve (53), and the oil inlet pipe (46) is connected to the purified oil return valve (36).

6. The lubricating oil condition monitoring and control device and method for a screw compressor unit according to claim 5, characterized in that: The controller (6) is connected to the oil temperature gauge and the alarm (38) and is used to issue an alarm signal when the oil temperature is abnormal.

7. The lubricating oil condition monitoring and control device for a screw compressor unit according to claim 6, characterized in that: The porous filter element (57) and activated carbon filling layer (59) inside the purification box (51) are used to further filter and adsorb impurities and moisture in the lubricating oil.

8. The lubricating oil condition monitoring and control device for a screw compressor unit according to claim 7, characterized in that: The primary magnetic filter (541) and the secondary magnetic filter (551) are inclined and parallel to each other, used to filter metal particles and impurities in the lubricating oil, and are blocked and collected by the primary impurity block (542) and the secondary impurity block (552).

9. A method for monitoring and controlling the lubricating oil condition of a screw compressor unit according to claim 7, characterized in that, Includes the following steps: S1. The oil pressure, viscosity, metal particles, oil quality and moisture of the lubricating oil are monitored in real time by the sensors in the monitoring box (41); S2. The controller (6) judges the lubricating oil status based on the sensor data and controls the opening of the pre-purification output valve (43) and the purification box input valve (52) so that the lubricating oil enters the purification box (51) for purification. S3. The purified lubricating oil flows back to the oil tank (31) through the purified output valve (53) and the oil tank inlet valve (45); S4. If the lubricating oil is in normal condition, it will flow back to the unit's lubricating oil distributor (2) directly through the output valve (42).

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