阅读说明：本技术 一种旋转接头主动密封强制润滑系统 (Rotary joint active sealing forced lubrication system ) 是由 赵红红 李明 李根营 曹枫 王祥 陈卫超 王帅 于 2021-07-29 设计创作，主要内容包括：本发明公开了一种旋转接头主动密封强制润滑系统,包括控制系统和主动润滑系统,其中控制系统包括控制器、马达转速传感器和泥浆压力传感器；主动润滑系统包括调速电机、润滑泵站、溢流阀,润滑泵站通过油路与旋转接头连接,控制器与调速电机连接,用于控制调速电机的启停和转速。本润滑系统通过马达转速传感器和泥浆压力传感器的配合,使旋转接头在工作时能够正常润滑,避免磨损,并在大流量供油工况下将泥沙颗粒从芯轴表面冲走,从而提高了旋转接头的使用寿命,并降低了使用成本。(The invention discloses a rotary joint active sealing forced lubrication system, which comprises a control system and an active lubrication system, wherein the control system comprises a controller, a motor rotating speed sensor and a slurry pressure sensor; the active lubricating system comprises a speed regulating motor, a lubricating pump station and an overflow valve, wherein the lubricating pump station is connected with the rotary joint through an oil way, and the controller is connected with the speed regulating motor and used for controlling the starting, stopping and rotating speed of the speed regulating motor. This lubricating system passes through motor speed sensor and mud pressure sensor's cooperation, makes rotary joint can normally lubricate at the during operation, avoids wearing and tearing to wash away silt particle from the dabber surface under large-traffic fuel feeding operating mode, thereby improved rotary joint's life, and reduced use cost.)

1. The utility model provides a swivel joint initiative sealing force-feed lubrication system which characterized in that: the automatic lubrication system comprises a control system and an active lubrication system, wherein the control system comprises a controller, a motor rotating speed sensor and a mud pressure sensor, and the mud pressure sensor and the motor rotating speed sensor are respectively connected with the controller; the active lubrication system comprises a speed regulating motor, a lubrication pump station and an overflow valve, wherein the speed regulating motor is used for providing power for the lubrication pump station, and the lubrication pump station is connected with the rotary joint through an oil way and provides lubricating oil for the rotary joint; the controller is connected with the speed regulating motor and is used for controlling the starting, the stopping and the rotating speed of the speed regulating motor; when the motor speed sensor detects that a signal is input and the mud pressure sensor does not detect that the signal is input, the controller controls the speed regulating motor to enable the lubricating pump station to continuously supply oil to the rotary joint at a small flow rate; when the motor speed sensor and the mud pressure sensor do not detect signal input, the lubrication pump station stops supplying oil to the rotary joint; when the motor speed sensor detects that a signal is input and the mud pressure sensor detects that a signal is input, the controller controls the speed regulating motor to enable the lubricating pump station to continuously supply large-flow oil to the rotary joint.

2. The active seal forced lubrication system for a rotary joint according to claim 1, wherein: the active lubrication system further comprises a throttle valve, and the throttle valve is located on an oil path between the lubrication pump station and the rotary joint.

3. The active seal forced lubrication system for a rotary joint according to claim 1, wherein: the active lubrication system further comprises a one-way valve, and the one-way valve is located on an oil path between the throttling valve and the rotary joint.

Technical Field

The invention relates to the technical field of directional drilling machines, in particular to a rotary joint active sealing forced lubrication system.

Background

The existing horizontal directional drilling machine is characterized in that the service lives of a common rotary joint mandrel and a seal ring are short, the seal ring is passively sealed according to the pressure of slurry media, when the pressure of the media is low, the opening degree of a lip is small, the sealing effect is poor, impurities are easy to enter the mandrel and the seal, the slurry impurities enter the space between the seal ring and the mandrel, the hardness of the impurities is high, accelerated abrasion of the mandrel and the seal can be caused, the sealing performance of the whole structure is influenced, the service lives of the mandrel and the seal are shortened, only a small amount of lubricating oil is reserved inside the opened lip, the lubricating oil can be gradually lost after working for a certain time, if the lubricating oil cannot be replenished in time, the friction force between the mandrel and the seal is increased, the abrasion of the mandrel and the seal ring can be accelerated, maintenance personnel are required to be frequently arranged, and the labor cost is increased. The large-tonnage rotary joint is inconvenient to assemble and is not basically dismantled during debugging, so that the rotary joint always works in a lubrication-free state during debugging of the drilling machine, the rotary joint is abraded in a sealing mode, and the sealing performance and the service performance are influenced.

Disclosure of Invention

The invention aims to provide an active sealing forced lubrication system for a rotary joint, which enables lubricating oil to be always stored between a sealing ring and a mandrel of the rotary joint and can wash away gravel in slurry so as to prolong the service life of the mandrel and the sealing and reduce the use cost and the maintenance cost.

In order to achieve the purpose, the active sealing forced lubrication system for the rotary joint comprises a control system and an active lubrication system, wherein the control system comprises a controller, a motor rotating speed sensor and a mud pressure sensor, and the mud pressure sensor and the motor rotating speed sensor are respectively connected with the controller; the active lubrication system comprises a speed regulating motor, a lubrication pump station and an overflow valve, wherein the speed regulating motor is used for providing power for the lubrication pump station, and the lubrication pump station is connected with the rotary joint through an oil way and provides lubricating oil for the rotary joint; the controller is connected with the speed regulating motor and is used for controlling the starting, the stopping and the rotating speed of the speed regulating motor; when the motor speed sensor detects that a signal is input and the mud pressure sensor does not detect that the signal is input, the controller controls the speed regulating motor to enable the lubricating pump station to continuously supply oil to the rotary joint at a small flow rate; when the motor speed sensor and the mud pressure sensor do not detect signal input, the lubrication pump station stops supplying oil to the rotary joint; when the motor speed sensor detects that a signal is input and the mud pressure sensor detects that a signal is input, the controller controls the speed regulating motor to enable the lubricating pump station to continuously supply large-flow oil to the rotary joint.

Further, the active lubrication system further comprises a throttle valve, and the throttle valve is located on an oil path between the lubrication pump station and the rotary joint.

Further, the active lubrication system further comprises a one-way valve, and the one-way valve is located on an oil path between the throttle valve and the rotary joint.

The invention has the beneficial effects that: the control system and the active lubricating system are arranged, so that the controller controls the active lubricating system to provide lubricating oil with different flow rates by detecting the working and stopping states of the power head and the slurry pump of the horizontal directional drilling machine, the sealing ring of the rotary joint can be normally lubricated in two working states of oil supply, the abrasion condition is reduced, high-pressure lubricating oil can be used for backflushing slurry particles entering the sealing ring when the slurry pump works, and the service life of the rotary joint is prolonged.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a logic control diagram of the controller of the present invention;

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples.

The forced lubrication system in this embodiment is used on a horizontal directional drill. As shown in fig. 1, the active sealing forced lubrication system for the rotary joint comprises a control system and an active lubrication system, wherein the control system comprises a controller, a motor speed sensor and a mud pressure sensor, and the mud pressure sensor and the motor speed sensor are respectively connected with the controller. The mud pressure sensor is used for detecting whether the mud pump acts, and the motor rotating speed sensor is used for detecting whether the power head acts. The active lubricating system comprises a speed regulating motor, a lubricating pump station and an overflow valve, wherein the speed regulating motor is used for providing power for the lubricating pump station, and the lubricating pump station is connected with the rotary joint through an oil way. The rotary joint belongs to the prior art, and the patent number thereof is: CN 202020247977.4. The controller is connected with the speed regulating motor and is used for controlling the starting, the stopping and the rotating speed of the speed regulating motor. As shown in fig. 2, the present invention provides three modes of operation:

the first working mode is that when the motor speed sensor detects that a signal is input, namely the power head rotates, and when the mud pressure sensor does not detect that the signal is input, the controller controls the speed regulating motor, so that the lubricating pump station continuously supplies oil to the rotary joint at a low flow rate, and the core shaft in the rotary joint is prevented from being in frictional contact with the sealing ring under the condition of no lubricating oil.

The second working mode is that when the motor speed sensor and the mud pressure sensor do not detect the input of signals, the lubrication pump station stops supplying oil to the rotary joint, and at the moment, the whole lubrication system does not work.

The third working mode is that when the motor speed sensor detects that a signal is input and the mud pressure sensor detects that a signal is input, the controller controls the speed regulating motor to enable the lubricating pump station to continuously supply large-flow oil to the rotary joint, on one hand, a sealing ring and a core shaft in the rotary joint are lubricated, on the other hand, silt particles entering a contact surface between the sealing ring and the core shaft due to high-speed flow of mud can be washed away, so that the rotary joint can work normally, and the service life of the rotary joint is prolonged. The active lubricating system further comprises a throttle valve and a one-way valve, the throttle valve is located on an oil way between the lubricating pump station and the rotary joint, and the one-way valve is located on an oil way between the throttle valve and the rotary joint. The one-way valve avoids the situation that slurry reversely enters the lubricating pump due to high slurry pressure, and the throttle valve can controllably adjust the amount of lubricating oil, so that the use cost of a user can be reduced.

In the invention, the active lubricating system provides high-pressure lubricating oil, the controller controls the starting, stopping and rotating speed of the speed regulating motor to realize the supply of the lubricating oil and the supply quantity of the lubricating oil, the lubricating oil reduces the friction force between the mandrel and the sealing ring, and meanwhile, the high-pressure lubricating oil can forcibly remove impurities entering between the sealing ring and the mandrel, thereby avoiding the abrasion under the first working mode and the third working mode. Due to the arrangement of the three working conditions, the use cost can be reduced, and the service life of the rotary joint is prolonged. In addition, the embodiment is also provided with an overflow valve, and the set pressure of the overflow valve is higher than the normal pressure of the slurry of the horizontal directional drilling machine.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited thereto, and various changes which can be made within the knowledge of those skilled in the art without departing from the gist of the present invention are within the scope of the claims of the present invention.