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A Method for Monitoring the Leakage of Rotary Pump Shaft Seal

A technology of rotating pumps and rotating shafts, which is applied in the direction of measuring the increase and decrease rate of fluid, pump testing, liquid tightness measurement using liquid/vacuum degree, etc. It can solve the hysteresis and uncertainty that are not suitable for modern production requirements, etc. problems, to achieve simple and convenient implementation, ensure safe operation, and avoid economical effects

Inactive Publication Date: 2017-02-01
BEIJING UNIV OF CHEM TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the current shaft seal leakage monitoring method is very unsuitable for today's safe, economical and energy-saving modern production requirements due to its hysteresis and uncertainty.

Method used

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  • A Method for Monitoring the Leakage of Rotary Pump Shaft Seal
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  • A Method for Monitoring the Leakage of Rotary Pump Shaft Seal

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Embodiment 1

[0014] A method for monitoring the leakage of a shaft seal of a rotary pump. The method specifically includes: providing threads on the mating surface of the sealing cover 3 and the rotating shaft 4, and opening one end of the sealing cover 3 leading to the mating surface and the other end of the sealing cap 3. To the pressure guide hole 5 of the pressure sensor 6; the pressure sensor 6 is connected to the controller, and the controller is also connected to the alarm device; firstly, the screw thread on the mating surface of the sealing cover 3 and the rotating shaft 4 is used to pressurize the pump leakage liquid, and then pass The pressure guide hole 5 transmits the leakage hydraulic pressure to the pressure sensor 6, and the controller finally executes the control action according to the pressure signal generated by the pressure sensor 6; the thread is arranged on the sealing cover 3; the thread is triangular; the pressure sensor 6. Connect to the controller through a signal...

Embodiment 2

[0016] A method for monitoring the leakage of a shaft seal of a rotary pump. The method specifically includes: providing threads on the mating surface of the sealing cover 3 and the rotating shaft 4, and opening one end of the sealing cover 3 leading to the mating surface and the other end of the sealing cap 3. To the pressure guide hole 5 of the pressure sensor 6; the pressure sensor 6 is connected to the controller, and the controller is also connected to the alarm device; firstly, the screw thread on the mating surface of the sealing cover 3 and the rotating shaft 4 is used to pressurize the pump leakage liquid, and then pass The pressure guide hole 5 transmits the leakage hydraulic pressure to the pressure sensor 6, and the controller finally performs the control action according to the pressure signal generated by the pressure sensor 6; the thread is arranged on the rotating shaft 4; the thread is arc-shaped; the The pressure sensor 6 is connected to the controller through...

Embodiment 3

[0018] A method for monitoring the leakage of a shaft seal of a rotary pump. The method specifically includes: providing threads on the mating surface of the sealing cover 3 and the rotating shaft 4, and opening one end of the sealing cover 3 leading to the mating surface and the other end of the sealing cap 3. To the pressure guide hole 5 of the pressure sensor 6; the pressure sensor 6 is connected to the controller, and the controller is also connected to the alarm device; firstly, the screw thread on the mating surface of the sealing cover 3 and the rotating shaft 4 is used to pressurize the pump leakage liquid, and then pass The pressure guide hole 5 transmits the leakage hydraulic pressure to the pressure sensor 6, and the controller finally executes the control action according to the pressure signal generated by the pressure sensor 6; the thread is arranged on the sealing cover 3 and the rotating shaft 4; the thread is trapezoidal , and the direction of rotation is oppos...

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Abstract

The invention belongs to the technical field of shaft seal monitoring, in particular to a method for monitoring rotary pump shaft seal leakage. The method comprises the steps that threads are formed in the mating surface of a sealing cover and a rotary shaft, a pressure guide hole is formed in the sealing cover, one end of the pressure guide hole is communicated with the mating surface, and the other end of the pressure guide hole is communicated with a pressure sensor; the pressure sensor is connected with a controller, and the controller is connected with an alarm device; pump leakage liquid is pressurized by using the threads formed in the mating surface of the sealing cover and the rotary shaft, the pressure of the leakage liquid is transmitted to the pressure sensor through the pressure guide hole, and finally acting execution is controlled by the controller according to pressure signals generated by the pressure sensor. Compared with the prior art, the pump shaft seal leakage is monitored timely and directionally, the function of transmitting the leakage liquid to a short-distance safe place is achieved, the healthy safety state of rotary shaft seal work can be effectively monitored, safe operation of a pump is guaranteed, and dual-loss of economy and safe due to the fact that the leakage is not found in time is avoided.

Description

technical field [0001] The invention belongs to the technical field of shaft seal monitoring, and in particular relates to a method for monitoring the leakage of a rotary pump shaft seal. Background technique [0002] At present, the shaft seal leakage monitoring technology of rotary pumps mainly monitors the working condition of the shaft seal by monitoring the pump flow rate, the head performance parameter change or the medium concentration at the shaft seal. In the method of monitoring the change of pump flow rate and head performance parameters, the leakage can only be detected when the performance parameters change significantly. At this time, the shaft seal often has serious leakage, which shows that this leakage monitoring method is serious. Hysteresis, there is a great security risk. Another concentration monitoring method has certain limitations because it monitors the change of the concentration of the space medium. For example, the medium is required to have a ce...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04B51/00G01M3/26
Inventor 马润梅丁克勤何常远
Owner BEIJING UNIV OF CHEM TECH