Lubricating oil supplementing device for bearing inlet of pump unit, monitoring control system and monitoring control method

Abstract

The invention discloses a bearing inlet lubricating oil supplementing device of a pump unit, which is arranged at the position of each bearing lubricating oil inlet on the pump unit and comprises a shell, an oil supplementing pump, a driving motor, a lubricating oil inlet pipeline and a lubricating oil outlet pipeline, the oil supplementing pump is arranged in the shell; the driving motor is arranged in the shell and is connected with the oil supplementing pump; one end of the lubricating oil inlet pipeline is communicated with the oil supplementing pump, and the other end of the lubricating oil inlet pipeline penetrates through the shell and is communicated with an external lubricating oil inlet; one end of the lubricating oil outlet pipeline is communicated with the oil supplementing pump, and the other end of the lubricating oil outlet pipeline penetrates through the shell and is communicated with a bearing chamber on the external pump unit; and the lubricating oil inlet pipeline is communicated with a bypass unit. The invention further discloses a monitoring control system and a monitoring control method for the pump unit. According to the method, the economical efficiency problem of current oil station operation and the reliability problem of pump unit bearing operation are solved.

Description

Technical Field

[0001] The present invention relates to high-power pump unit technology, and more specifically, to a bearing inlet lubricating oil replenishing device, a monitoring control system and a monitoring control method for a pump unit. Background Art

[0002] like Figure 1 As shown, various high-power pump units 100 have oil-lubricated bearing systems 200 to meet the requirements of operational stability and reliability of pumps, motors, gearboxes, etc. At present, the lubrication of these bearings 101 on the pump unit 100 is mainly ensured by forced oil supply circulation cooling of the oil-lubricated bearing system 200. However, for long-term running pump units, the lubrication of thrust bearings and guide bearings is a local internal lubrication, and the external oil-lubricated bearing system 200 only supplies oil through constant oil pressure. This oil supply method may have the following problems:

[0003] 1) The actual bearing supply is unknown and depends on the resistance of the oil pipeline. The greater the resistance, the smaller the oil supply;

[0004] 2) The working load of the bearing is variable. When the load is high, the bearing temperature increases and more lubricating oil is required;

[0005] 3) If it is a variable frequency motor, the bearing load increases with the speed, thus the bearing temperature increases and more lubricating oil is required;

[0006] 4) When the bearing temperature increases, the existing system lubricating oil cannot increase the amount of lubricating oil accordingly to reduce the bearing temperature;

[0007] 5) In order to ensure that the lubricating oil of the pump unit has sufficient lubrication and cooling, the external lubricating oil station is often designed to have excessively high power, resulting in excessive power consumption during operation of the oil station. Summary of the invention

[0008] In view of the defects existing in the prior art, the purpose of the present invention is to provide a bearing inlet lubricating oil replenishing device, a monitoring control system and a monitoring control method for a pump unit, which solve the current economic problems of oil station operation and the reliability problems of pump unit bearing operation.

[0009] To achieve the above object, the present invention adopts the following technical solution:

[0010] A first aspect of the present invention provides a bearing inlet lubricating oil replenishing device of a pump unit, which is arranged at the lubricating oil inlet position of each bearing on the pump unit, and comprises a housing, an oil replenishing pump, a driving motor, a lubricating oil inlet pipeline and a lubricating oil outlet pipeline;

[0011] The oil replenishment pump is arranged in the housing;

[0012] The driving motor is arranged in the housing and connected to the oil replenishing pump;

[0013] One end of the lubricating oil inlet pipeline is connected to the oil replenishment pump, and the other end passes through the housing and is connected to the external lubricating oil inlet;

[0014] One end of the lubricating oil outlet pipeline is connected to the oil replenishment pump, and the other end passes through the housing and is connected to the upper bearing chamber of the external pump unit;

[0015] The lubricating oil inlet pipeline is connected with a bypass unit.

[0016] Preferably, the bypass unit comprises a lubricating oil bypass inlet pipeline, a one-way check valve and a regulating valve;

[0017] One end of the lubricating oil bypass inlet pipeline is connected to the lubricating oil inlet pipeline, and the other end passes through the shell and is connected to the external lubricating oil inlet;

[0018] The one-way check valve and the regulating valve are both arranged on the lubricating oil bypass inlet pipeline located outside the housing.

[0019] Preferably, a sealing structure is provided at a connection between the lubricating oil inlet pipeline and the housing, a connection between the lubricating oil outlet pipeline and the housing, and a connection between the lubricating oil bypass inlet pipeline and the housing.

[0020] The second aspect of the present invention provides a monitoring and control system for the bearing inlet lubricating oil replenishing device of the pump unit provided in the first aspect of the present invention, comprising a plurality of the bearing inlet lubricating oil replenishing devices of the pump unit, a sensor unit, a data acquisition instrument, a server and a controller;

[0021] A plurality of lubricating oil replenishing devices for bearing inlets of the pump unit are respectively arranged at the lubricating oil inlet positions of the bearings on the pump unit;

[0022] The sensor unit is arranged around the bearing chamber of the pump unit;

[0023] The data acquisition device is used to collect the bearing operation status data detected by the sensor unit;

[0024] The server establishes a data communication connection with the data acquisition instrument and sends instructions to the controller;

[0025] The controller is used to control the start and stop of the oil replenishing pump on the lubricating oil replenishing device of the bearing inlet of the pump unit and the opening of the regulating valve.

[0026] Preferably, the sensor unit includes a plurality of temperature sensors, a plurality of pressure sensors, a rotation speed sensor, a displacement sensor and a vibration sensor.

[0027] The third aspect of the present invention provides a monitoring and control method for a pump unit. The monitoring and control system provided according to the second aspect of the present invention collects the bearing operating status data of the bearings on the pump unit, monitors and warns the bearing operating status, starts and stops the oil replenishment pump and adjusts the opening of the regulating valve according to the various temperatures and loads of the bearings on the pump unit, and finally lubricates the bearings on the pump unit normally.

[0028] The invention provides a bearing imported lubricating oil replenishing device, monitoring control system and monitoring control method for a pump unit, which solves the current problems of oil station operation economy and pump unit bearing operation reliability, and also saves labor and production management costs by adopting intelligent control. It also has the following beneficial effects:

[0029] 1) It solves the risk that the bearing cannot operate safely and reliably due to insufficient lubricating oil supply during pump operation;

[0030] 2) It reflects the digital intelligence capability of the pump bearing's complete self-healing protection, that is, the bearing temperature will not increase suddenly and significantly, and will maintain a stable and balanced state;

[0031] 3) Avoid the repetitive and simple work of manual inspection and refueling or recording oil levels through automatic refueling and big data collection. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is a schematic diagram of an existing pump unit;

[0033] Figure 2 It is a structural schematic diagram of the bearing inlet lubricating oil replenishing device of the present invention;

[0034] Figure 3 It is a schematic diagram of the arrangement of the bearing inlet lubricating oil replenishing device of the present invention;

[0035] Figure 4 is a schematic diagram of a monitoring and control system of a pump unit of the present invention;

[0036] Figure 5 It is a schematic diagram of the arrangement of the sensor units in the monitoring and control system of the pump unit of the present invention. DETAILED DESCRIPTION

[0037] In order to better understand the above technical solution of the present invention, the technical solution of the present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0038] Combination Figure 2 and Figure 3As shown, the present invention provides a bearing inlet lubricating oil replenishing device for a pump unit, which is arranged at the lubricating oil inlet position of each bearing on the pump unit (thrust bearing, radial bearing), and includes a housing 1, an oil replenishing pump 2, a drive motor 3, a lubricating oil inlet pipeline 4 and a lubricating oil outlet pipeline 5.

[0039] The charge pump 2 is arranged inside the housing 1 .

[0040] The driving motor 3 is disposed inside the housing 1 and connected to the oil replenishing pump 2 to drive the oil replenishing pump 2 .

[0041] One end of the lubricating oil inlet pipeline 4 is connected to the inlet of the oil replenishing pump 3 , and the other end passes through the housing 1 and is connected to the external lubricating oil inlet 6 .

[0042] One end of the lubricating oil outlet pipeline 6 is connected to the outlet of the oil replenishment pump 3 , and the other end passes through the housing 1 and is connected to the upper bearing chamber of the external pump unit 100 .

[0043] The lubricating oil flowing in from the external lubricating oil inlet 6 can enter the bearing chamber through the bearing inlet lubricating oil replenishing device of the present invention to lubricate the bearing normally.

[0044] The lubricating oil inlet pipeline 4 is connected with a bypass unit, which allows the lubricating oil to enter normally and flow out to the bearing chamber.

[0045] The bypass unit comprises a lubricating oil bypass inlet pipeline 7 , a one-way check valve 8 and a regulating valve 9 .

[0046] One end of the lubricating oil bypass inlet pipeline 7 is connected to the lubricating oil inlet pipeline 4 , and the other end passes through the housing 1 and is connected to the external lubricating oil inlet 6 .

[0047] The one-way check valve 8 and the regulating valve 9 are both arranged on the lubricating oil bypass inlet pipeline 7 located outside the housing 1 .

[0048] The one-way check valve 8 ensures that lubricating oil passes through the lubricating oil inlet pipeline 4 and the oil replenishing pump 2 when the pump is working.

[0049] The regulating valve 9 can be adjusted manually or electrically according to the bearing workload.

[0050] The bearing inlet lubricating oil replenishing device of the present invention can perform additional adjustment and oil replenishment according to the temperature, pressure, rotation speed, rotor axial displacement and vibration of the bearing.

[0051] A sealing structure 10 is also provided at the connection between the lubricating oil inlet pipeline 4 and the housing 1 , the connection between the lubricating oil outlet pipeline 5 and the housing 1 , and the connection between the lubricating oil bypass inlet pipeline 7 and the housing 1 .

[0052] Combination Figure 4As shown, the present invention also provides a monitoring and control system based on the bearing inlet lubricating oil replenishing device of the present invention, including multiple pump unit bearing inlet lubricating oil replenishing devices 300 of the present invention, a sensor unit, a data acquisition instrument 11, a server 12 and a controller 13.

[0053] A plurality of pump unit bearing inlet lubricating oil replenishing devices 300 are respectively installed at the lubricating oil inlet positions of the bearings (thrust bearings, radial bearings) on the pump unit.

[0054] The sensor unit is installed near the bearing chamber on the pump unit.

[0055] The data collector 11 is used to collect the bearing operating status data detected by the sensor unit.

[0056] The server 12 establishes a data communication connection with the data acquisition device 11 and sends instructions to the controller 13 .

[0057] The controller 13 is used to control the start and stop of the oil replenishing pump 2 on the lubricating oil replenishing device 300 of the bearing inlet of the pump unit and the opening of the regulating valve 9.

[0058] Combination Figure 5 As shown, the sensor unit includes a plurality of temperature sensors 14, a plurality of pressure sensors 15, a rotation speed sensor 16, a displacement sensor 17 and a vibration sensor 18, which monitor and warn the operating status of the bearing.

[0059] The temperature sensor 14 is used to detect the temperature of the bearing chamber.

[0060] The pressure sensor 15 is used to detect the pressure in the bearing chamber.

[0061] The rotation speed sensor 16 is used to detect the rotation speed of the bearing.

[0062] The displacement sensor 17 is used to detect the axial displacement of the rotor on the bearing.

[0063] The vibration sensor 18 is used to detect the vibration of the bearing chamber.

[0064] Refer to Figures 2 to 5 As shown, the present invention also provides a monitoring and control method for a pump unit. According to the present invention, the monitoring and control system collects the bearing operating status data of the bearings on the pump unit, monitors and warns the bearing operating status, starts and stops the oil replenishment pump 2 and adjusts the opening of the regulating valve 9 according to the various temperatures and loads of the bearings on the pump unit, and finally lubricates the bearings on the pump unit normally.

[0065] Those skilled in the art should recognize that the above embodiments are only used to illustrate the present invention, and are not intended to limit the present invention. As long as they are within the spirit of the present invention, any changes or modifications to the above embodiments will fall within the scope of the claims of the present invention.

Claims

1. A bearing inlet lubricating oil replenishing device for a pump unit, arranged at the lubricating oil inlet position of each bearing on the pump unit, characterized in that: It includes a housing, an oil replenishment pump, a drive motor, a lubricating oil inlet pipeline and a lubricating oil outlet pipeline; The oil replenishment pump is arranged in the housing; The driving motor is arranged in the housing and connected to the oil replenishing pump; One end of the lubricating oil inlet pipeline is connected to the oil replenishment pump, and the other end passes through the housing and is connected to the external lubricating oil inlet; One end of the lubricating oil outlet pipeline is connected to the oil replenishment pump, and the other end passes through the housing and is connected to the upper bearing chamber of the external pump unit; The lubricating oil inlet pipeline is connected with a bypass unit.

2. The bearing inlet lubricating oil replenishing device of the pump unit according to claim 1 is characterized in that: The bypass unit includes a lubricating oil bypass inlet pipeline, a one-way check valve and a regulating valve; One end of the lubricating oil bypass inlet pipeline is connected to the lubricating oil inlet pipeline, and the other end passes through the shell and is connected to the external lubricating oil inlet; The one-way check valve and the regulating valve are both arranged on the lubricating oil bypass inlet pipeline located outside the housing.

3. The bearing inlet lubricating oil replenishing device of the pump unit according to claim 2 is characterized in that: A sealing structure is provided at the connection between the lubricating oil inlet pipeline and the shell, at the connection between the lubricating oil outlet pipeline and the shell, and at the connection between the lubricating oil bypass inlet pipeline and the shell.

4. A monitoring and control system for the bearing inlet lubricating oil replenishing device of the pump unit according to any one of claims 1 to 3, characterized in that: It includes a plurality of pump unit bearing inlet lubricating oil replenishing devices, a sensor unit, a data acquisition instrument, a server and a controller; A plurality of lubricating oil replenishing devices for bearing inlets of the pump unit are respectively arranged at the lubricating oil inlet positions of the bearings on the pump unit; The sensor unit is arranged around the bearing chamber of the pump unit; The data acquisition device is used to collect the bearing operation status data detected by the sensor unit; The server establishes a data communication connection with the data acquisition instrument and sends instructions to the controller; The controller is used to control the start and stop of the oil replenishing pump on the lubricating oil replenishing device of the bearing inlet of the pump unit and the opening of the regulating valve.

5. The monitoring and control system according to claim 4, characterized in that: The sensor unit includes a plurality of temperature sensors, a plurality of pressure sensors, a rotation speed sensor, a displacement sensor and a vibration sensor.

6. A monitoring and control method for a pump unit, characterized in that: According to the monitoring and control system as described in claim 4, the bearing operating status data of the bearing on the pump unit is collected, the bearing operating status is monitored and early warning is performed, the oil replenishment pump is started and stopped and the opening of the regulating valve is adjusted according to the various temperatures and loads of the bearing on the pump unit, and finally the bearing on the pump unit is normally lubricated.

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