阅读说明：本技术 一种智能油膜轴承供油监测传感接头 (Intelligent oil film bearing oil supply monitoring sensing connector ) 是由 刘勤博 徐展 沈馗 于 2019-01-10 设计创作，主要内容包括：本发明公开了一种智能油膜轴承供油监测传感接头,包括轧机动压管路上的软管、硬管,以及远端中控室,还包括套筒,套筒的两端上分别连有左、右端盖,左端盖上具有出口处,出口处与硬管连接,右端盖上设有航空接头、活动螺母和连接器基座,活动螺母与软管连接；套筒内具有芯管,套筒内设有压力传感器、温度传感器、第一超声波探头和第二超声波探头,第一超声波探头和第二超声波探头均贴合芯管的外侧,压力传感器和温度传感器均与左端盖相连；压力传感器、温度传感器、第一超声波探头和第二超声波探头的信号线均与连接器基座连接,连接器基座与航空接头对接。本发明能够在恶劣工况下工作,对油膜轴承动压进油口的压力、流量、动压温度进行实时监测。(The invention discloses an intelligent oil film bearing oil supply monitoring sensing joint, which comprises a hose, a hard pipe and a far-end central control room on a rolling mill dynamic pressure pipeline, and further comprises a sleeve, wherein the two ends of the sleeve are respectively connected with a left end cover and a right end cover, the left end cover is provided with an outlet, the outlet is connected with the hard pipe, the right end cover is provided with an aviation joint, a movable nut and a connector base, and the movable nut is connected with the hose; the sleeve is internally provided with a core tube, the sleeve is internally provided with a pressure sensor, a temperature sensor, a first ultrasonic probe and a second ultrasonic probe, the first ultrasonic probe and the second ultrasonic probe are attached to the outer side of the core tube, and the pressure sensor and the temperature sensor are connected with the left end cover; the signal lines of the pressure sensor, the temperature sensor, the first ultrasonic probe and the second ultrasonic probe are all connected with the connector base, and the connector base is in butt joint with the aviation connector. The oil film bearing dynamic pressure oil inlet monitoring device can work under severe working conditions, and can monitor the pressure, the flow and the dynamic pressure temperature of the dynamic pressure oil inlet of the oil film bearing in real time.)

1. An intelligent oil film bearing oil supply monitoring sensing joint, comprising: last hose, the hard tube of rolling mill dynamic pressure pipeline to and the accuse room in the distal end, its characterized in that still includes: the device comprises a sleeve, a left end cover and a right end cover are respectively connected to two ends of the sleeve, an outlet is formed in the left end cover and is connected with a hard pipe on a rolling mill dynamic pressure pipeline, an aviation connector, a movable nut and a connector base are arranged on the right end cover, and the movable nut is connected with a hose on the rolling mill dynamic pressure pipeline;

the sleeve is internally provided with a core pipe, the axis of the core pipe is horizontally arranged, the sleeve is internally provided with a pressure sensor, a temperature sensor, a first ultrasonic probe and a second ultrasonic probe, the first ultrasonic probe and the second ultrasonic probe are attached to the outer side of the core pipe, and the pressure sensor and the temperature sensor are connected with the left end cover;

the signal lines of the pressure sensor, the temperature sensor, the first ultrasonic probe and the second ultrasonic probe are all connected with a connector base, the connector base is in butt joint with an aviation connector, and the aviation connector is used for transmitting monitoring signals of the pressure sensor, the temperature sensor, the first ultrasonic probe and the second ultrasonic probe to the far-end central control room for real-time online monitoring.

2. The intelligent oil film bearing oil supply monitoring sensing joint of claim 1, wherein: the sleeve is made of stainless steel and is designed to be in a cylindrical shape.

3. The intelligent oil film bearing oil supply monitoring sensing joint of claim 1, wherein: two channels of grooves are arranged between the left end cover and the core pipe, lubricating oil in the core pipe is introduced into the two channels of grooves, the pressure sensor is connected to the tail end of one channel of grooves and used for monitoring oil pressure, and the temperature sensor is connected to the tail end of the other channel of grooves and used for monitoring oil temperature.

4. The intelligent oil film bearing oil supply monitoring sensing joint of claim 1, wherein: the right end cover is tightly pressed on the end part of the sleeve through a locking nut.

5. The intelligent oil film bearing oil supply monitoring sensing joint of claim 1, wherein: the temperature sensor is connected with the left end cover through a transition joint.

6. The intelligent oil film bearing oil supply monitoring sensing joint of claim 1, wherein: and the upper outlet of the left end cover is in threaded connection with a hard pipe on a dynamic pressure pipeline of the rolling mill and a flexible pipe on the dynamic pressure pipeline of the rolling mill.

7. The intelligent oil film bearing oil supply monitoring sensing joint of claim 1, wherein: the diameter of the core pipe is consistent with that of a dynamic pressure pipeline of the rolling mill.

Technical Field

The invention relates to a real-time online state monitoring technology for an oil film bearing, in particular to an intelligent oil film bearing oil supply monitoring sensing joint.

Background

Oil film bearings, also known as fluid friction bearings, are key core components of modern rolling mills. The oil film bearing is a radial sliding bearing taking lubricating oil as a lubricating medium, and the lubricating principle of the oil film bearing is as follows: in the rolling process, the shaft neck of the roll shaft is forced to move under the action of rolling force, the center of the oil film bearing is eccentric with the center of the shaft neck, and a gap between the oil film bearing and the shaft neck forms two areas, namely a divergent area (the gap is gradually increased along the rotation direction of the shaft neck), and a convergent area (the gap is gradually decreased along the rotation direction of the shaft neck). When the rotating journal holds the viscous lubricating oil from the divergent area to the convergent area, the bearing clearance is reduced along the rotating direction of the journal to form an oil wedge, so that pressure is generated in the lubricating oil. The resultant force of the pressure of each point in the oil film along the rolling direction is the bearing capacity of the oil film bearing. When the rolling force is larger than the bearing force, the eccentricity between the center of the journal and the center of the oil film bearing is increased. In the convergence region, the bearing clearance is changed along the rotation direction of the shaft neck, the minimum oil film thickness is reduced, the pressure in the oil film is increased, the bearing capacity is increased until the bearing capacity is balanced with the rolling force, the center of the shaft neck is not deviated any more, the oil film bearing and the shaft neck are completely separated by lubricating oil, and theoretically, full-fluid lubrication is formed.

The modern rolling mill back-up roll, especially have large-scale slab band tandem mill of the automatic control function of shape and thickness, mostly adopt the oil film bearing. The oil film bearing has the advantages of good bearing performance, stable and reliable work, long service life, wide speed range, small structure size, low friction coefficient and the like, and is widely applied to various machines and industries. Under normal conditions, a bearing bush and a rotating shaft of the oil film bearing are separated by a lubricating oil film, and the oil film bearing has the advantages, but has the defects that a shaft sleeve, a taper bush and the like have low heat resistance and are easy to damage at high temperature. When the oil film is damaged, boundary friction is formed between the rotating shaft and the bearing bush, and equipment failure is easily caused. And no equipment for monitoring the oil film bearing in real time is arranged on a common rolling mill, and the damage of the oil film bearing is difficult to find in the actual use process.

Therefore, the oil film shaft burning loss accident on the rack often occurs in the online operation process of certain steel mill cold continuous rolling units, the number of times that the oil film shaft is damaged and cannot be used is more and more, the burning loss accident causes the factory to be forced to stop and replace the supporting roller, and further the whole unit is stopped, the normal production is seriously influenced, the total stop time loss is increased, the direct economic loss of the bush repair is high, and the real-time monitoring on the parameters of the pressure, the temperature, the flow and the like of the oil film bearing is very necessary.

Because the parameters to be monitored for the oil film bearing are more, the installation space inside the rolling mill is very limited, if a plurality of sensors are directly installed on the oil film bearing or an oil supply pipeline, irreversible damage is inevitably caused to an oil supply pipeline system, and great influence is caused on the working stability of the oil film bearing. On the other hand, because a plurality of sensors are respectively separated and positioned in a severe field environment, the sensors are easily interfered by external factors when testing and collecting various parameters, particularly, the inside of a rolling mill is a humid and high-temperature environment with corrosivity of acidic emulsion, the phenomena of service life shortening or damage of the sensors and the like are easily caused under the environment, the problems of inconvenience of sensor replacement and the like are further caused, the machine set is shut down and the production efficiency is influenced.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide the intelligent oil film bearing oil supply monitoring sensing connector which can run on line for a long time, has long service life, can work under severe working conditions, has high precision and can monitor the pressure, the flow and the dynamic pressure temperature of the dynamic pressure oil inlet of the oil film bearing in real time.

In order to achieve the purpose, the invention adopts the following technical scheme:

an intelligent oil film bearing oil supply monitoring sensing joint, comprising: last hose, the hard tube of rolling mill dynamic pressure pipeline to and the control room in the distal end, still include: the device comprises a sleeve, a left end cover and a right end cover are respectively connected to two ends of the sleeve, an outlet is formed in the left end cover and is connected with a hard pipe on a rolling mill dynamic pressure pipeline, an aviation connector, a movable nut and a connector base are arranged on the right end cover, and the movable nut is connected with a hose on the rolling mill dynamic pressure pipeline;

the sleeve is internally provided with a core pipe, the axis of the core pipe is horizontally arranged, the sleeve is internally provided with a pressure sensor, a temperature sensor, a first ultrasonic probe and a second ultrasonic probe, the first ultrasonic probe and the second ultrasonic probe are attached to the outer side of the core pipe, and the pressure sensor and the temperature sensor are connected with the left end cover;

the signal lines of the pressure sensor, the temperature sensor, the first ultrasonic probe and the second ultrasonic probe are all connected with a connector base, the connector base is in butt joint with an aviation connector, and the aviation connector is used for transmitting monitoring signals of the pressure sensor, the temperature sensor, the first ultrasonic probe and the second ultrasonic probe to the far-end central control room for real-time online monitoring.

The sleeve is made of stainless steel and is designed to be in a cylindrical shape.

Two channels of grooves are arranged between the left end cover and the core pipe, lubricating oil in the core pipe is introduced into the two channels of grooves, the pressure sensor is connected to the tail end of one channel of grooves and used for monitoring oil pressure, and the temperature sensor is connected to the tail end of the other channel of grooves and used for monitoring oil temperature.

The right end cover is tightly pressed on the end part of the sleeve through a locking nut.

The temperature sensor is connected with the left end cover through a transition joint.

And the upper outlet of the left end cover is in threaded connection with a hard pipe on a dynamic pressure pipeline of the rolling mill and a flexible pipe on the dynamic pressure pipeline of the rolling mill.

The diameter of the core pipe is consistent with that of a dynamic pressure pipeline of the rolling mill.

In the technical scheme, the intelligent oil film bearing oil supply monitoring sensing joint provided by the invention can monitor and know the flow, pressure and temperature of the dynamic pressure oil inlet of the oil film bearing in real time, is convenient for timely and effectively finding the problem on a dynamic pressure system when abnormal, and avoids the burning accident of the oil film bearing caused by the problem of the dynamic pressure system. Meanwhile, the method also has the following beneficial effects:

1) the intelligent oil film bearing oil supply monitoring sensing joint has the advantages that the functions of various monitoring sensors are scientifically integrated and integrally designed, the installation is simple and easy, and the maintenance is convenient;

2) the intelligent oil film bearing oil supply monitoring sensing joint has the advantages that the appearance structure is small and exquisite, the weight is light, the space is saved, and the intelligent oil film bearing oil supply monitoring sensing joint can be smoothly installed on monitored rolling mill equipment;

3) the intelligent oil film bearing oil supply monitoring sensing joint introduces an aviation joint design, collects and transmits monitoring signal data of all sensors in a centralized manner, is convenient to analyze, and has stable transmission performance, good anti-interference performance, few faults and long service life;

4) the intelligent oil film bearing oil supply monitoring sensing joint is structurally designed according to the size, the threads and the like of a dynamic pressure lubrication oil supply pipeline of the oil film bearing, can be directly connected in series in the oil supply pipeline, and cannot cause any damage to the equipment structure of a monitored object;

5) the structural design of the intelligent oil film bearing oil supply monitoring sensing joint adopts a hollow passage design, and the intelligent oil film bearing oil supply monitoring sensing joint can be directly connected in series in a dynamic pressure lubrication oil supply pipeline and cannot generate any negative effect influence on the original oil supply state;

6) the intelligent oil film bearing oil supply monitoring sensing joint adopts scientific integration and integrated design, signals have no interference, the anti-interference performance to the outside is good, the monitoring data is accurate, and the precision is high;

7) the intelligent oil film bearing oil supply monitoring sensing connector is designed in a cylindrical mode, adopts high-quality stainless steel materials as the outer wall, carries out integral wrapping protection, effectively isolates the severe working condition of a rolling mill outside, and provides excellent protection for an internal precise sensor probe, so that the working stability is greatly improved, and the practical service life is prolonged.

Drawings

FIG. 1 is a schematic structural diagram of an intelligent oil film bearing oil supply monitoring sensing joint.

Detailed Description

The technical scheme of the invention is further explained by combining the drawings and the embodiment.

Referring to fig. 1, the intelligent oil film bearing oil supply monitoring sensing joint provided by the present invention includes: the hose, the hard tube and the far-end central control chamber on the dynamic pressure pipeline of the rolling mill are parts of the prior art and are not described in detail herein. Different from the prior art, the method further comprises the following steps: the two ends of the sleeve 8 are respectively connected with a left end cover 2 and a right end cover 10, an outlet is formed in the left end cover 2 and is connected with a hard pipe on the rolling mill dynamic pressure pipeline, the right end cover 10 is tightly pressed on the end portion of the sleeve 8 under the locking action of a locking nut 11, an aviation connector 13, a movable nut 12 and a connector base 9 are arranged on the right end cover 10, and the movable nut 12 is connected with a hose on the rolling mill dynamic pressure pipeline.

Preferably, the sleeve 8 is internally provided with a core tube 6, the axis of the core tube 6 is horizontally arranged, the sleeve 8 is internally provided with a pressure sensor 3, a temperature sensor 5, a first ultrasonic probe 4 and a second ultrasonic probe 7, the first ultrasonic probe 4 and the second ultrasonic probe 7 are attached to the outer side of the core tube 6 and are horizontally arranged in the same manner as the axis of the core tube 6, a necessary interval is reserved between the first ultrasonic probe 4 and the second ultrasonic probe 7 and used for measuring the flow of lubricating oil in the core tube 6, the pressure sensor 3 is connected with the left end cover 2, and the temperature sensor 5 is connected with the left end cover 2 through a transition joint 1.

Preferably, the signal lines of the pressure sensor 3, the temperature sensor 5, the first ultrasonic probe 4 and the second ultrasonic probe 7 are all connected with the connector base 9, the connector base 9 is in butt joint with the aviation connector 13, and the aviation connector 13 is used for transmitting monitoring signals of the pressure sensor 3, the temperature sensor 5, the first ultrasonic probe 4 and the second ultrasonic probe 7 into the far-end central control room for real-time online monitoring.

The intelligent oil film bearing oil supply monitoring sensing joint integrates three monitoring functions of oil supply pressure, flow and temperature, can realize real-time online monitoring on the oil film bearing oil supply pressure, flow and temperature as long as the intelligent oil film bearing oil supply monitoring sensing joint is directly connected to an oil film bearing dynamic pressure pipeline, and can give an alarm in time once the oil supply is abnormal, so that maintenance personnel can handle the oil supply in time, and malignant accidents are effectively avoided.

In the process of monitoring the oil film bearing of the rolling mill, the dynamic pressure, the dynamic pressure flow and the dynamic pressure temperature of oil supplied to the oil film bearing need to be monitored, meanwhile, the fact that the sensors are easily interfered by respective external factors when the sensors measure the signals independently is considered, the monitoring test precision is influenced, the service life of the sensors is easily shortened due to the severe working environment, and in addition, the oil supply system is inevitably influenced due to the fact that a plurality of sensor installation measuring points are installed in a narrow space inside the rolling mill. According to the thread sizes of the rolling mill dynamic pressure oil inlet hose and the hard pipe connecting port, the outlet on the left end cover 2 and the hard pipe on the rolling mill dynamic pressure pipeline and the movable nut 12 and the hose on the rolling mill dynamic pressure pipeline are in threaded connection, so that the intelligent oil film bearing oil supply monitoring sensing connector can be directly arranged in the dynamic pressure pipeline. Meanwhile, the overall external dimension of the intelligent oil film bearing oil supply monitoring sensing joint is strictly designed according to the internal constraint dimension of the rolling mill, and particularly, the occurrence of field friction accidents caused by the improper dimension of the intelligent oil film bearing oil supply monitoring sensing joint is not allowed. Therefore, the appearance of the intelligent oil film bearing oil supply monitoring sensing joint is designed to be cylindrical, and the outermost sleeve 8 is integrally wrapped by stainless steel, so that the inside of the intelligent oil film bearing oil supply monitoring sensing joint is isolated from the severe environment of a rolling mill, and the condition that the acidic and corrosive environments in the rolling mill cause irreversible damage to a sensor in the intelligent oil film bearing oil supply monitoring sensing joint is avoided. And a core pipe 6 for conveying lubricating oil is arranged at an eccentric position in the stainless steel sleeve 8, and the diameter of the core pipe 6 is consistent with that of a dynamic pressure pipeline of the rolling mill. In the space between the sleeve 8 and the core tube 6, the pressure sensor 3, the temperature sensor 5, the first ultrasonic probe 4, and the second ultrasonic probe 7 are arranged. Two channels are arranged between the left end cover 2 and the core pipe 6, lubricating oil in the core pipe 6 is led into the two channels, the pressure sensor 3 is connected to the tail end of one channel of channel and used for monitoring oil pressure, and the temperature sensor 5 is connected to the tail end of the other channel and used for monitoring oil temperature. The first ultrasonic probe 4 and the second ultrasonic probe 7 are arranged outside the core tube 6 in the axial direction of the core tube 6, and monitor the flow rate of the lubricating oil in the core tube 6. The signal lines of the pressure sensor 3, the temperature sensor 5, the first ultrasonic probe 4 and the second ultrasonic probe 7 are uniformly connected to the connector base 9, the connector base 9 is in butt joint with the aviation connector 13, and the signal difference is transmitted to a remote central control room through the aviation connector 13. The arrangement mode of the aviation connector 13 is adopted, the on-site installation time is reduced, the aviation connector 13 has good protection sealing performance, only the male connector and the female connector of the aviation connector 13 are directly connected in a butt joint mode when the aviation connector is used on site, secondly, the arrangement mode of each sensor does not cause extra hydraulic resistance on an oil path of a dynamic pressure oil supply system, after the intelligent oil film bearing oil supply monitoring sensing connector is installed, extra differential pressure loss does not exist in a dynamic pressure pipeline, and the influence on an original system is reduced to the minimum. Meanwhile, the integrated intelligent oil film bearing oil supply monitoring sensing connector is used, the maintenance efficiency can be obviously improved, and the intelligent oil film bearing oil supply monitoring sensing connector can be quickly replaced when a problem occurs.

In conclusion, the intelligent oil film bearing oil supply monitoring sensing joint solves the problem of monitoring the dynamic pressure lubrication oil supply state of the oil film bearing of the rolling mill, provides a feasible, effective and stable solution, can simultaneously monitor three most critical state characterization parameters of pressure, temperature and flow of dynamic pressure lubrication oil supply in real time, transmits monitoring data to a central control computer in real time, carries out real-time early warning once the oil supply state is abnormal, reminds maintenance personnel to deal with the abnormal state in advance, and stops accident potential at the initial stage of germination, thereby effectively preventing the occurrence of the malignant accident that the bearing is burnt due to poor lubrication. After the intelligent oil film bearing oil supply monitoring sensing joint is applied to a rolling mill, the burning accident of the oil film bearing caused by poor dynamic pressure lubrication of the oil film bearing is reduced to zero every year, so that the stable and smooth running of a rolling mill set is ensured, and considerable economic benefits are created for enterprises.

It should be understood by those skilled in the art that the above embodiments are only for illustrating the present invention and are not to be used as a limitation of the present invention, and that changes and modifications to the above described embodiments are within the scope of the claims of the present invention as long as they are within the spirit and scope of the present invention.