Lubricating oil liquid operation system

Abstract

The embodiment of the utility model provides a lubricating oil operation system, which relates to the technical field of lubricating oil operation and comprises an oil tank, an oil pump, an oil pump motor, a circulating pipeline, a temperature sensor and a PID (Proportion Integration Differentiation) controller, the oil pump is arranged in the oil tank and connected with an oil pump motor arranged on the outer side of the oil tank. The first end of the circulating pipeline is connected with the oil pump motor, and the second end of the circulating pipeline is connected to an oil inlet of the oil tank; the temperature sensor is arranged on the oil tank and used for obtaining the temperature of lubricating oil in the oil tank. The temperature sensor is connected with the PID controller, and the PID controller is further connected with the oil pump motor. According to the technical scheme, the rotating speed of the oil pump motor can be adjusted according to the temperature of lubricating oil, and normal operation of the lubricating oil under different temperature conditions is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of lubricating oil operation, in particular to a lubricating oil operation system. Background Art

[0002] The viscosity of lubricating oil changes with temperature. When the oil temperature is around 40°C, the oil viscosity has the best lubrication effect. When the temperature is below 40°C, the lower the temperature, the higher the oil viscosity. The viscosity of lubricating oil is extremely high in low temperature environment. Starting the oil pump under this condition will cause insufficient oil suction from the pump, resulting in cavitation, vibration, noise and other problems. High oil viscosity will also cause the oil pump to be overloaded and burn out.

[0003] Therefore, how to achieve the operation of lubricating oil under different temperature conditions is a technical problem that urgently needs to be solved. Utility Model Content

[0004] The embodiment of the utility model provides a lubricating oil liquid operation system to solve the operation problems encountered by the lubricating oil liquid under different temperature conditions.

[0005] Other features and advantages of the present invention will become apparent from the following detailed description or may be learned in part from the practice of the present invention.

[0006] According to a first aspect of an embodiment of the utility model, there is provided a lubricating oil operation system, comprising: an oil tank, an oil pump, an oil pump motor, a circulation pipeline, a temperature sensor and a PID controller;

[0007] The oil pump is arranged inside the oil tank and connected to the oil pump motor arranged outside the oil tank;

[0008] The first end of the circulation pipeline is connected to the oil pump motor, and the second end is connected to the oil inlet of the oil tank;

[0009] The temperature sensor is arranged on the oil tank and is used to obtain the temperature of the lubricating oil in the oil tank;

[0010] The temperature sensor is connected to the PID controller, and the PID controller is also connected to the oil pump motor.

[0011] In some embodiments of the present invention, based on the above solution, it further includes: a heater;

[0012] The heater is arranged on the outer side of the bottom of the oil tank.

[0013] In some embodiments of the present utility model, based on the above-mentioned solution, an elastic coupling is provided between the oil pump motor and the oil pump.

[0014] In some embodiments of the present invention, based on the above solution, the oil pump motor adopts a variable frequency motor.

[0015] In some embodiments of the present invention, based on the above-mentioned solution, the oil pump adopts an extended screw pump.

[0016] In some embodiments of the present invention, based on the above-mentioned solution, a safety valve is provided on the circulation pipeline.

[0017] The technical solution of the utility model can adjust the rotation speed of the oil pump motor according to the temperature of the lubricating oil, thereby realizing the normal operation of the lubricating oil under different temperature conditions.

[0018] It should be understood that the above general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings herein are incorporated into the specification and constitute a part of the specification, showing embodiments consistent with the present utility model, and together with the specification, are used to explain the principles of the present utility model. Obviously, the drawings described below are only some embodiments of the present utility model, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0020] Figure 1 A structural schematic diagram of a lubricating oil liquid operation system according to an embodiment of the utility model is shown.

[0021] Description of Reference Numerals

[0022] 1-Oil tank, 2-Oil pump, 3-Oil pump motor, 4-Circulation pipeline, 5-Heater, 6-Elastic coupling, 7-Safety valve. DETAILED DESCRIPTION

[0023] The example embodiments will now be described more fully with reference to the accompanying drawings. However, the example embodiments can be implemented in a variety of forms and should not be construed as limited to the examples set forth herein; on the contrary, these embodiments are provided so that the present invention will be more comprehensive and complete, and the concept of the example embodiments will be fully conveyed to those skilled in the art.

[0024] In addition, the described features, structures or characteristics may be combined in one or more embodiments in any suitable manner. In the following description, many specific details are provided to provide a full understanding of the embodiments of the present utility model. However, those skilled in the art will appreciate that the technical solution of the present utility model can be practiced without one or more of the specific details, or other methods, components, devices, steps, etc. may be adopted. In other cases, known methods, devices, implementations or operations are not shown or described in detail to avoid blurring the various aspects of the present utility model.

[0025] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the objects used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those shown or described.

[0026] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] Some embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0028] In order to solve the technical problems existing in the prior art, the embodiment of the utility model provides a lubricating oil operation system, which includes: an oil tank, an oil pump, an oil pump motor, a circulation pipeline, a temperature sensor and a PID controller;

[0029] The oil pump is arranged inside the oil tank and connected to the oil pump motor arranged outside the oil tank;

[0030] The first end of the circulation pipeline is connected to the oil pump motor, and the second end is connected to the oil inlet of the oil tank;

[0031] The temperature sensor is arranged on the oil tank and is used to obtain the temperature of the lubricating oil in the oil tank;

[0032] The temperature sensor is connected to the PID controller, and the PID controller is also connected to the oil pump motor.

[0033] It should be noted that, in the embodiment of the utility model, the oil pump motor serves as a power system and cooperates with the oil pump to extract the lubricating oil in the oil tank.

[0034] It should be noted that the function of the circulation pipeline is: when the temperature of the lubricating oil does not meet the requirements for external transportation, it will first circulate internally through the circulation pipeline until the lubricating oil temperature meets the requirements before being output.

[0035] It should be noted that the temperature sensor is used to monitor the temperature of the lubricating oil in the oil tank in real time.

[0036] It should be noted that PID controller refers to proportional-integral-differential controller, which consists of proportional unit (P), integral unit (I) and differential unit (D). Through the setting of three parameters Kp, Ki and Kd, PID controller is mainly suitable for systems that are basically linear and whose dynamic characteristics do not change with time.

[0037] In an embodiment of the utility model, a PID controller is respectively connected to a temperature sensor and an oil pump motor. The PID controller controls the speed of the oil pump motor in real time based on the temperature signal monitored by the temperature sensor. At low temperatures, the oil pump motor is controlled to run at a low speed. As the temperature of the lubricating oil gradually increases, the viscosity of the oil decreases, and the motor load decreases, the PID controller gradually increases the speed of the oil pump motor. After the temperature of the lubricating oil reaches the set temperature value, the speed of the oil pump motor is controlled by the total flow value of the lubricating oil that needs to be delivered.

[0038] For example, see Figure 1 , shows a structural schematic diagram of a lubricating oil liquid operation system according to an embodiment of the utility model.

[0039] like Figure 1 As shown, a lubricating oil operation system is shown, including an oil tank 1, an oil pump 2, an oil pump motor 3, a circulation pipeline 4, a temperature sensor and a PID controller; the temperature sensor and the PID controller are not shown in FIG. Figure 1 Shown in.

[0040] The oil pump 2 is arranged inside the oil tank 1, and is used to cooperate with the oil pump motor 3 to extract the lubricating oil inside the oil tank 1; the oil pump motor 3 is arranged outside the oil tank 1, and is connected to the oil pump 2, and is used to provide power for extracting the lubricating oil; Figure 1 As shown, in this example, two groups of oil pumps 2 and oil pump motors 3 are provided to ensure the extraction efficiency of the lubricating oil and to ensure that when one group fails, the other group can still operate normally.

[0041] One end of the circulation pipe 4 is connected to the oil pump motor 3, and the other end is reconnected to the oil inlet of the oil tank 1. When the lubricating oil has not yet reached the temperature for external transportation, it is first circulated internally through the circulation pipe 4 to circulate and stir the oil.

[0042] The temperature sensor is arranged on the oil tank 1 to obtain the temperature of the lubricating oil in the oil tank 1. In the specific setting process, bimetallic thermometers can be installed at different heights around the oil tank, at heights of 1 / 5, 2 / 5, 3 / 5, and 4 / 5 respectively, to observe the uniformity of the oil temperature at each height layer of the entire oil tank. The collected temperature information is averaged and input into the PID controller. The PID controller adaptively adjusts the speed of the oil pump motor 3 based on the temperature information.

[0043] In some feasible embodiments, based on the above solution, it further includes: a heater;

[0044] The heater is arranged on the outer side of the bottom of the oil tank.

[0045] It can be understood that the heater is arranged on the outer side of the bottom of the oil tank, which can achieve uniform heating of the lubricating oil in the oil tank.

[0046] For example, Figure 1 As shown, three heaters 5 are evenly spaced apart on the outside of the bottom of the oil tank 1 to achieve uniform heating of the oil tank 1; in a specific setting process, the three heaters 5 can be set in a water tank, and the water in the water tank is in contact with the bottom of the oil tank 1. The three heaters 5 heat the lubricating oil in the oil tank 1 by heating the water.

[0047] In some feasible embodiments, based on the above-mentioned solution, an elastic coupling is provided between the oil pump motor and the oil pump.

[0048] It should be noted that the use of an elastic coupling to connect the oil pump motor to the oil pump can extend the starting acceleration time of the oil pump motor and reduce the impact when the oil pump motor starts.

[0049] For example, Figure 1 As shown, the elastic coupling 6 is located outside the oil tank 1 and is arranged between the oil pump 2 and the oil pump motor 3 .

[0050] In some feasible embodiments, based on the above-mentioned solution, the oil pump motor adopts a variable frequency motor.

[0051] It is understandable that the variable frequency motor can cooperate with the PID controller, which controls its own speed, thereby achieving an increase in motor speed as the temperature rises.

[0052] In some feasible embodiments, based on the above-mentioned solution, the oil pump adopts an extended screw pump.

[0053] It is understandable that the extended screw pump can enhance the suction force; when the oil pump is running at a low temperature with the lubricating oil, the extended screw pump can fully absorb the oil, thus solving the problems of cavitation, vibration, noise, etc. caused by insufficient oil absorption.

[0054] In some feasible embodiments, based on the above-mentioned solution, a safety valve is provided on the circulation pipeline.

[0055] It should be noted that the safety valve is a special valve whose opening and closing parts are in a normally closed state under the action of external force. When the medium pressure in the equipment or pipeline rises above the specified value, the medium is discharged to the outside of the system to prevent the medium pressure in the pipeline or equipment from exceeding the specified value.

[0056] like Figure 1 As shown, a safety valve 7 is provided on the circulation pipeline 4 to ensure that the pressure of the lubricating oil in the circulation pipeline 4 does not exceed a specified value, thereby improving safety.

[0057] Based on the same utility model concept, the utility model embodiment also provides a lubricating oil operation method, which is applied to the system as described in any of the above embodiments, including:

[0058] Acquiring the lubricating oil temperature through the temperature sensor;

[0059] When the lubricating oil temperature is lower than a first set temperature threshold, heating the lubricating oil;

[0060] When the lubricating oil temperature is greater than or equal to a first set temperature threshold and less than a second set temperature threshold, the oil pump motor is started, and the PID controller increases the speed of the oil pump motor based on the increase in the lubricating oil temperature;

[0061] When the lubricating oil temperature is greater than or equal to a second set temperature threshold, controlling the oil pump motor to rotate at a constant speed;

[0062] Wherein, the first set temperature threshold is less than the second set temperature threshold.

[0063] It can be understood that in this method, the speed of the oil pump motor is adjusted in real time according to the oil temperature through the PID controller to ensure safe and stable operation of the equipment.

[0064] It can be understood that when the lubricating oil temperature is greater than or equal to the second set temperature threshold, it means that the current lubricating oil has met the temperature requirements for external transportation. At this time, the speed of the oil pump motor is determined by the flow rate of the lubricating oil that needs to be output to the outside. After the speed is determined, the oil pump motor rotates at a constant speed to supply oil to the outside.

[0065] Illustratively, a specific example of the present method is provided.

[0066] Assume that the first set temperature threshold is 5°C and the second set temperature threshold is 32°C.

[0067] (1) When the lubricating oil temperature is less than 5°C, in order to protect the oil pump motor, only heating is performed without circulation;

[0068] (2) When the lubricating oil temperature is 5℃≤<32℃, the internal heating circulation control mode is implemented to circulate the oil in the oil tank horizontally and vertically. Through the temperature (viscosity) and PID adjustment of the oil pump motor, the motor is placed in the optimal working condition, the oil is heated evenly while the motor current is kept constant, the wear and noise of the motor oil pump are reduced, and energy is saved.

[0069] (3) When the oil temperature is ≥32°C, the main supply flow is used to control the speed of the oil pump motor; the oil in the oil tank is circulated horizontally and vertically to achieve the purpose of uniform heating of the oil at all positions in the oil tank. At this time, the main pump supplies oil to the reducer.

[0070] Those skilled in the art will readily come up with other embodiments of the present invention after considering the specification and practicing the embodiments disclosed herein. The present invention is intended to cover any variations, uses or adaptations of the present invention, which follow the general principles of the present invention and include common knowledge or customary technical means in the art that are not disclosed in the present invention. It should be understood that the present invention is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

Claims

1. A lubricating oil running system, characterized in that: include: Oil tank, oil pump, oil pump motor, circulation pipeline, temperature sensor and PID controller; The oil pump is arranged inside the oil tank and connected to the oil pump motor arranged outside the oil tank; The first end of the circulation pipeline is connected to the oil pump motor, and the second end is connected to the oil inlet of the oil tank; The temperature sensor is arranged on the oil tank and is used to obtain the temperature of the lubricating oil in the oil tank; The temperature sensor is connected to the PID controller, and the PID controller is also connected to the oil pump motor.

2. The system according to claim 1, characterized in that Also includes: Heater; The heater is arranged on the outer side of the bottom of the oil tank.

3. The system according to claim 1, characterized in that An elastic coupling is arranged between the oil pump motor and the oil pump.

4. The system according to claim 1, characterized in that The oil pump motor adopts a variable frequency motor.

5. The system according to claim 1, characterized in that The oil pump adopts an extended screw pump.

6. The system according to claim 1, characterized in that The circulation pipeline is provided with a safety valve.

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