阅读说明：本技术 润滑油质量监控方法及设备 (Lubricating oil quality monitoring method and equipment ) 是由 易书理 于 2019-09-12 设计创作，主要内容包括：本发明公开了一种润滑油质量监控方法,包括以下步骤：S10：建立空白基础油理化指标的随温度变化曲线；S20：传感器采集调和釜中调和前的基础油的温度、粘度、密度和介电常数数据；S30：微控制器对传感器采集的数据进行筛选,并将筛选后的数据与空白基础油理化指标进行比对,通过粘度差、密度差和介电常数差构建判别函数和阈值来判定基础油打入调和釜中时是否受到上批次油品的污染。相应地,本发明还公开了一种润滑油质量监控设备。本发明结构简单、实现方便,为润滑油生产厂家调和过程及设备厂商润滑油加注的质量控制提供更多的支持。(The invention discloses a lubricating oil quality monitoring method, which comprises the following steps: s10: establishing a temperature-dependent change curve of the physical and chemical indexes of the blank base oil; s20: the method comprises the following steps that a sensor collects temperature, viscosity, density and dielectric constant data of base oil before blending in a blending kettle; s30: the microcontroller screens data acquired by the sensors, compares the screened data with physical and chemical indexes of blank base oil, and establishes a discrimination function and a threshold value through viscosity difference, density difference and dielectric constant difference to judge whether the base oil is polluted by the oil of the previous batch when the base oil is injected into the blending kettle. Correspondingly, the invention also discloses lubricating oil quality monitoring equipment. The invention has simple structure and convenient realization, and provides more support for the blending process of lubricating oil manufacturers and the quality control of lubricating oil filling of equipment manufacturers.)

1. a lubricating oil quality monitoring method is characterized by comprising the following steps:

S10: establishing a temperature-dependent change curve of the physical and chemical indexes of the blank base oil;

S20: the method comprises the following steps that a sensor collects temperature, viscosity, density and dielectric constant data of base oil before blending in a blending kettle;

s30: the microcontroller screens data acquired by the sensors, compares the screened data with physical and chemical indexes of blank base oil, and establishes a discrimination function and a threshold value through viscosity difference, density difference and dielectric constant difference to judge whether the base oil is polluted by the oil of the previous batch when the base oil is injected into the blending kettle.

2. the method for monitoring the quality of lubricating oil according to claim 1, wherein step S30 is followed by the following steps:

S40: establishing a curve which is changed along with the temperature and is used for blending the physical and chemical indexes of the finished product;

S50: the sensor collects the temperature, viscosity, density and dielectric constant data of the blended base oil in the blending kettle;

S60: the microcontroller screens data collected by the sensors, compares the screened data with physicochemical indexes of finished products after blending, and establishes a discrimination function and a threshold value through viscosity difference, density difference and dielectric constant difference to judge whether the blending of the base oil in the blending kettle is finished and whether the dosage and the type of the additive are correct.

3. The method for monitoring the quality of lubricating oil according to claim 2, wherein the step S60 is followed by the steps of:

S70: establishing a temperature-dependent change curve of the physicochemical indexes of the standard finished product;

S80: the sensor collects the temperature, viscosity, density and dielectric constant data of the lubricating oil injected into the equipment;

s90: the microcontroller screens data collected by the sensor, compares the screened data with physical and chemical indexes of a standard finished product, and establishes a discrimination function and a threshold value through viscosity difference, density difference and dielectric constant difference to judge whether the index of the lubricating oil injected into the equipment is qualified.

4. the method for monitoring the quality of the lubricating oil according to claim 2, wherein in step S50, the sensor is placed in a blending tank pipeline of a lubricating oil factory.

5. the method for monitoring the quality of lubricating oil according to claim 3, wherein in step S80, the sensor is placed in a lubricating oil filling pipeline of an equipment manufacturer.

6. an apparatus for monitoring the quality of lubricating oil by implementing the method according to any one of claims 1 to 6, comprising a sensor for collecting temperature, viscosity, density and dielectric constant data of the lubricating oil and a microcontroller for preprocessing the data collected by the sensor and comparing the preprocessed data with a standard baseline of the lubricating oil to determine the current quality status of the lubricating oil product.

7. the lubricating oil quality monitoring device according to claim 6, comprising a heating module electrically connected to the microcontroller, wherein the microcontroller controls the heating module to heat the lubricating oil.

8. The lubricating oil quality monitoring device according to claim 6, comprising a wireless transmission module, wherein the wireless transmission module is electrically connected with the microcontroller, the microcontroller is in wireless communication with the central console, and the central console monitors the quality state of the lubricating oil in real time.

Technical Field

The invention relates to lubricating oil, in particular to a lubricating oil quality monitoring method and equipment.

Background

The production of the lubricating oil is mainly a physical blending process, and the blending process can make provisions for the blending time, the blending temperature, and the power and speed of the stirring cycle of the lubricating oil. However, the formulation of these processes is often from experience, and occasionally, problems such as uneven blending, too long blending time, and contamination by residual oil from the last batch occur.

the variety of additives used in the blending process is wide, and the incoming inspection is usually performed according to batch inspection rather than independent packaging inspection, so that the risk of missing inspection of the additives is high. The blending kettle of lubricating oil can not do special cauldron specializedly usually because of the productivity problem, and different lubricating oil sequences can need to be reconciled in a blending kettle, can bring like this and remain the problem, and also often bring the pollution because of remaining in the market, cause the condition of heavy loss to appear.

After production of a plurality of mechanical devices is finished, lubricating oil needs to be filled and then the mechanical devices are debugged or delivered from factories, and equipment factories with large scales often adopt a centralized filling mode, such as refrigerator compressor factories, which are generally centralized filling of oiling machines. There are a number of quality risk points in the intermediate lines from the storage tank to the fuel gun and in the buffer tank, and moisture, metal content and other contaminants may be exceeded.

Quality real time monitoring in the mediation cauldron is mainly the temperature at present, and temperature monitoring can accomplish: prevent the additive from being dissolved unevenly due to too low temperature and prevent the oil product from aging due to too high temperature. And when the small residue of the different oils of the previous batch is difficult to be found by laboratory infrared spectroscopy. Many equipment manufacturers may perform field checks on lubricating oils without neglecting the quality risk of the lubricating oil after introduction into the plant before filling, e.g., the moisture may change with storage time.

disclosure of Invention

The first purpose of the invention is to control the quality risk of the lubricating oil blending of manufacturers, therefore, a lubricating oil quality monitoring method is provided.

A second object of the present invention is to meet the need for checking the quality of the lubricating oil at different stages, and therefore to provide a lubricating oil quality monitoring device.

The technical scheme adopted by the invention is as follows:

A lubricating oil quality monitoring method comprises the following steps:

S10: establishing a temperature-dependent change curve of the physical and chemical indexes of the blank base oil;

S20: the method comprises the following steps that a sensor collects temperature, viscosity, density and dielectric constant data of base oil before blending in a blending kettle;

S30: the microcontroller screens data acquired by the sensors, compares the screened data with physical and chemical indexes of blank base oil, and establishes a discrimination function and a threshold value through viscosity difference, density difference and dielectric constant difference to judge whether the base oil is polluted by the oil of the previous batch when the base oil is injected into the blending kettle.

Preferably, step S30 is followed by the following steps:

s40: establishing a curve which is changed along with the temperature and is used for blending the physical and chemical indexes of the finished product;

S50: the sensor collects the temperature, viscosity, density and dielectric constant data of the blended base oil in the blending kettle;

S60: the microcontroller screens data collected by the sensors, compares the screened data with physicochemical indexes of finished products after blending, and establishes a discrimination function and a threshold value through viscosity difference, density difference and dielectric constant difference to judge whether the blending of the base oil in the blending kettle is finished and whether the dosage and the type of the additive are correct.

preferably, step S60 is followed by the following steps:

S70: establishing a temperature-dependent change curve of the physicochemical indexes of the standard finished product;

S80: the sensor collects the temperature, viscosity, density and dielectric constant data of the lubricating oil injected into the equipment;

s90: the microcontroller screens data collected by the sensor, compares the screened data with physical and chemical indexes of a standard finished product, and establishes a discrimination function and a threshold value through viscosity difference, density difference and dielectric constant difference to judge whether the index of the lubricating oil injected into the equipment is qualified.

Preferably, in step S50, the sensor is placed in a blending tank pipeline of a lubricating oil factory.

Preferably, in step S80, the sensor is placed in the lubricant oil filling pipe of the equipment manufacturer.

A lubricating oil quality monitoring device comprises a sensor and a microcontroller, wherein the sensor is used for collecting temperature, viscosity, density and dielectric constant data of lubricating oil, and the microcontroller preprocesses the data collected by the sensor and compares the preprocessed data with a standard base line of the lubricating oil so as to judge the quality state of a current lubricating oil product.

Preferably, the monitoring device comprises a heating module, the heating module is electrically connected with the microcontroller, and the microcontroller controls the heating module to heat the current lubricating oil.

preferably, the monitoring device comprises a wireless transmission module, the wireless transmission module is electrically connected with the microcontroller, the microcontroller is in wireless communication with the central console, and the central console monitors the quality state of the lubricating oil in real time.

Compared with the prior art, the invention has the beneficial effects that:

The device has simple structure, is convenient to realize, and can monitor the quality of the lubricating oil;

For a lubricating oil blending factory, whether the blending of the lubricating oil is homogenized or not is confirmed, so that the loss caused by uneven blending, pollution of oil products in a batch on the same blending kettle and excessive blending is reduced;

for mechanical equipment manufacturers, quality monitoring from the lubricating oil storage container to the filling equipment can be completed, and risk quality control is enhanced.

drawings

FIG. 1 is a flow chart of a method of monitoring the quality of lubricating oil in accordance with an embodiment of the present invention;

FIG. 2 is a schematic diagram of a sensor position installation during oil blending according to an embodiment of the present invention;

FIG. 3 is a schematic view of a sensor position installation during oil filling according to an embodiment of the present invention;

Fig. 4 is a block diagram of a lubricating oil quality monitoring apparatus according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

referring to fig. 1 to 3, a method for monitoring the quality of lubricating oil includes steps S10 to S90, where steps S10 to S60 are methods for monitoring the quality of lubricating oil in a lubricating oil blending factory, and steps S70 to S90 are methods for monitoring the quality of lubricating oil when the lubricating oil is filled in factory mechanical equipment.

The method for monitoring the quality of lubricating oil in a lubricating oil blending factory comprises the following steps:

s10: firstly, establishing a temperature-dependent change curve of the physical and chemical indexes of blank base oil;

Kinematic viscosity v ═ f1(t +273)

density p f2(t +273)

Dielectric constant xi ═ f3(t +273)

wherein t is temperature.

s20: the method comprises the following steps that a sensor collects temperature, viscosity, density and dielectric constant data of base oil before blending in a blending kettle;

S30: the microcontroller screens data acquired by the sensor, compares the screened data with physical and chemical indexes of blank base oil, and establishes a discrimination function and a threshold value through viscosity difference, density difference and dielectric constant difference to judge whether the base oil is polluted by the oil of the previous batch when the base oil is injected into the blending kettle;

The sensor data is discriminated with the discrimination function of

v,ρ,ξ＝f(v,ρ,ξ)

And comparing the standard values, and establishing a discrimination function and a threshold value by using the difference values delta v, delta rho and delta xi to judge whether the base oil is polluted by the oil of the last batch when being injected into the blending kettle.

S40: establishing a curve which is changed along with the temperature and is used for blending the physical and chemical indexes of the finished product;

kinematic viscosity v ═ f1(t +273)

density p f2(t +273)

Dielectric constant xi ═ f3(t +273)

Wherein t is temperature.

S50: the sensor collects temperature, viscosity, density and dielectric constant data of the blended base oil in the blending kettle.

As shown in fig. 2, the sensor 1 is placed in a pipeline of a blending kettle of a lubricating oil factory, and blended base oil flows out of the pipeline;

S60: the microcontroller screens data collected by the sensors, compares the screened data with physicochemical indexes of finished products after blending, and establishes a discrimination function and a threshold value through viscosity difference, density difference and dielectric constant difference to judge whether the blending of the base oil in the blending kettle is finished and whether the dosage and the type of the additive are correct.

The sensor data is discriminated with the discrimination function of

v,ρ,ξ＝f(v,ρ,ξ)

And (5) comparing the standard values, and establishing a discriminant function and a threshold value according to the difference values delta v, delta rho and delta xi to judge whether blending in the base oil blending kettle is finished or not and whether the dosage and the type of the additive are correct or not.

The method for monitoring the quality of the lubricating oil needing to be filled into the factory mechanical equipment comprises the following steps:

s70: establishing a temperature-dependent change curve of the physicochemical indexes of the standard finished product;

Kinematic viscosity v ═ f1(t +273)

Density p f2(t +273)

Dielectric constant xi ═ f3(t +27)

wherein t is temperature.

Meanwhile, a dielectric constant function related to the purity of the oil product can be established as

P＝H(ξ)。

S80: the sensor collects the temperature, viscosity, density and dielectric constant data of the lubricating oil injected into the equipment;

As shown in fig. 3, the sensor 1 is placed in the lubricant filling line of the equipment manufacturer, i.e. the quality of the lubricant is monitored before the lubricant is filled.

S90: the microcontroller screens data collected by the sensor, compares the screened data with physical and chemical indexes of a standard finished product, and establishes a discrimination function and a threshold value through viscosity difference, density difference and dielectric constant difference to judge whether the index of the lubricating oil injected into the equipment is qualified.

The sensor data is discriminated with the discrimination function of

v,ρ,P＝f(v,ρ,P)

And comparing the standard values, and establishing a discrimination function and a threshold value by using the difference value to judge whether the indexes of the lubricating oil injected into the equipment are qualified, such as whether the types of water, impurities and oil products are correct or not.

Referring to fig. 4, a lubricating oil quality monitoring device includes a sensor 1 and a microcontroller 2, the sensor 1 is electrically connected to the microcontroller 2, the sensor 1 is used for collecting temperature, viscosity, density and dielectric constant data of lubricating oil, the microcontroller 2 preprocesses the data collected by the sensor 1, and compares the preprocessed data with a standard baseline of the lubricating oil, thereby judging the current quality state of a lubricating oil product.

the sensor is preferably a commercially available integrated sensor, and the parameters detected include temperature, viscosity, density and dielectric constant. The sensor can be operated at-20 ℃ to 120 ℃. The sensors may be separately and independently tested sensors, but each sensor is required to be used at a maximum temperature of more than 110 ℃ and have good compatibility with lubricating oil to be tested, such as mineral oil, additives and the like. The preferred method for measuring viscosity is the tuning fork method.

the working temperature range of the microcontroller is as follows: -25 ℃ to 60 DEG C

Storage temperature: -25 ℃ to 85 DEG C

relative humidity: 95% no condensation

Protection grade: IP20

Inputting a power supply: DC15V-24V, 6W

Communication form: RS485, 11520bps

And (4) outputting an alarm: passive contact (normally open, capacity AC220V, 4A)

as an embodiment, the monitoring device comprises a heating module, the heating module is electrically connected with a microcontroller, and the microcontroller controls the heating module to heat the current lubricating oil. Some oil products need to be heated, and some oil products do not need to be heated, so the monitoring equipment does not need to be provided with a heating module and is designed according to specific needs. Because the lubricating oil detected by the invention is in a flowing state, the monitoring equipment does not need to be provided with a stirring device or a circulating pump device.

As an embodiment, the monitoring equipment comprises a wireless transmission module, the wireless transmission module is electrically connected with a microcontroller, the microcontroller is in wireless communication with a central console, the central console monitors the quality state of lubricating oil in real time, and meanwhile, historical records can be conveniently checked at the central console.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.