CN110594417A - Axial sealing static ring device capable of being used for monitoring friction torque - Google Patents

Axial sealing static ring device capable of being used for monitoring friction torque Download PDF

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Publication number
CN110594417A
CN110594417A CN201910972490.4A CN201910972490A CN110594417A CN 110594417 A CN110594417 A CN 110594417A CN 201910972490 A CN201910972490 A CN 201910972490A CN 110594417 A CN110594417 A CN 110594417A
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CN
China
Prior art keywords
ring
static
static ring
rotation pin
friction torque
Prior art date
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Pending
Application number
CN201910972490.4A
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Chinese (zh)
Inventor
孙鑫晖
王明洋
任宝杰
刘怀顺
曹生照
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China University of Petroleum East China
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China University of Petroleum East China
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by China University of Petroleum East China filed Critical China University of Petroleum East China
Priority to CN201910972490.4A priority Critical patent/CN110594417A/en
Publication of CN110594417A publication Critical patent/CN110594417A/en
Pending legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16JPISTONS; CYLINDERS; SEALINGS
    • F16J15/00Sealings
    • F16J15/16Sealings between relatively-moving surfaces
    • F16J15/34Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member
    • F16J15/3492Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member with monitoring or measuring means associated with the seal

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mechanical Sealing (AREA)

Abstract

The invention discloses an axial sealing static ring device for monitoring friction torque, which comprises: the static ring, the static ring seat, the anti-rotation pin and the static torque sensor. Two symmetrical threaded holes are formed in the back face of the static ring, threads are arranged at two ends of an anti-rotation pin used by the anti-rotation device, the threads on one side are used for being connected with the threads of the static ring, the threads on the other side are connected with the static torque sensor, the static ring seat is used for fixing the static ring and is provided with a through hole used for supporting the anti-rotation pin, the hole is designed into a fan-shaped ring shape, and the motion trend of the anti-rotation pin is met. According to the invention, the anti-rotation pin is fixedly connected with the static ring, and the friction torque of the static ring is led out to the torque sensor through the anti-rotation pin in threaded fit with the static ring, so that the problem that the friction torque of the static ring cannot be monitored in engineering is solved, and the intelligent monitoring of the running state of the sealing end face is promoted, so that the stability and reliability of mechanical sealing are further improved.

Description

Axial sealing static ring device capable of being used for monitoring friction torque
Technical Field
The invention belongs to the field of mechanical seal state monitoring, and particularly relates to an axial seal static ring device for monitoring friction torque.
Background
With the intelligent popularization of modern industry, the mechanical sealing technology is developing towards the direction of intelligent sealing and online control, and in order to realize intelligent sealing, the state of the end face of the mechanical sealing needs to be monitored. The mechanical seal is used as a key basic technology and an important basic component for preventing process medium or lubricating oil from leaking, saving energy, controlling environmental pollution and the like on industrial rotating equipment, and the quality and the performance of the mechanical seal determine the service efficiency and the service life of the equipment.
In the operation process of the mechanical seal, when the operation condition is abnormal or fluctuates greatly, the operation state between the end faces of the mechanical seal is changed, so that friction and abrasion occur between the end faces of the mechanical seal, a large amount of friction heat is generated, the thermal deformation of the end faces of the mechanical seal is further caused, the operation stability and safety of the mechanical seal are reduced, the degradation of the sealing performance is accelerated, and finally the seal fails.
At present, the study of scholars at home and abroad on the operation state of a sealing end surface comprises the temperature monitoring of a sealing ring, the film thickness measurement between the sealing rings and the monitoring of the operation state of the sealing by using an acoustic emission sensor, the measurement of the parameters is limited in the experimental and research stages of a laboratory at present, and the measurement is not actually applied in the actual engineering, mainly because the sensor for measuring the parameters has large volume, is difficult to install in the sealing in the actual engineering and is not beneficial to the later overhaul and maintenance. In addition, the running state of the sealing end face is not reflected by monitoring the friction torque of the sealing static ring in various monitoring technologies.
Disclosure of Invention
Aiming at the problems in the prior art of sealing state monitoring, the invention provides an axial sealing static ring device for monitoring friction torque, wherein an anti-rotation pin hole is originally arranged on the back surface of a sealing static ring and is changed into a spiral groove with the same size, another spiral groove is arranged at the symmetrical position of the sealing static ring, the anti-rotation pin is provided with a thread to be matched with the static ring, and the static ring torque is transmitted to a static torque sensor fixedly arranged outside a static ring seat through the anti-rotation pin, so that the monitoring of the friction torque of the static ring is realized.
In order to achieve the technical purpose, the invention adopts the following technical scheme:
an axial seal static ring apparatus useful for monitoring friction torque, comprising: the static ring, the static ring seat, the anti-rotation pin and the static torque sensor; the back of the static ring is provided with two symmetrical spiral grooves, the anti-rotation pin is supported by the static ring seat and provided with a sector ring hole, the included angle between one side of the sector ring and the central line is 3 degrees, two ends of the anti-rotation pin are provided with threads, one end of the anti-rotation pin is in threaded connection with the static ring, and the other end of the anti-rotation pin is connected with the static torque sensor.
In the axial sealing static ring device for monitoring the friction torque, the static ring seat fan ring hole can meet the rotating motion trend of the anti-rotating pin, the difference between the outer diameter and the inner diameter of the fan ring is slightly larger than the diameter of the anti-rotating pin, and the resistance to the anti-rotating pin is reduced to the minimum.
In the axial sealing static ring device capable of being used for monitoring the friction torque, in order to ensure the sealing performance, an O-shaped sealing ring is installed for auxiliary sealing, the O-shaped sealing ring has smaller friction force on the static ring, the actual value of the static ring can be slightly influenced when the friction torque of the static ring is measured, and the relative value monitoring of the device on the friction torque is not influenced.
In the above axial sealing static ring device for monitoring friction torque, the two spiral grooves are symmetrically formed to more smoothly and accurately transmit the friction torque of the static ring to the static torque sensor.
Compared with the existing sealing state monitoring technology, the invention has the following advantages:
the axial sealing static ring device for monitoring the friction torque provided by the invention selects the parameter of the static ring friction torque to monitor, and is more representative than the temperature of the sealing ring and the film thickness between the sealing rings; the back of the static ring is changed into a spiral groove from an anti-rotation pin hole, and the symmetrical part is provided with a second spiral groove, so that the anti-rotation pin can be connected with the static ring more stably, and the detection value of the friction torque is more stable; the anti-rotation pin transmits the friction torque to the sensor which is fixedly arranged outside the static ring seat, so that the sensor is more convenient to install, and the sealing performance of the sealing device is not influenced; the static torque sensor for measuring the friction torque is a sensor which is quite mature in research, and domestic manufacturers can customize the static torque sensor according to the shape, the size and the measuring range required by customers, so that the static torque sensor is quite convenient to select and use.
The features and advantages of the present invention will become more apparent upon reading of the detailed description of the invention in conjunction with the accompanying drawings.
Drawings
FIG. 1 is a schematic structural diagram of a first embodiment of an axial seal stationary ring device for monitoring friction torque according to the present invention;
FIG. 2 is a schematic structural view of the stationary ring of FIG. 1;
FIG. 3 is a schematic view of the anti-rotation pin of FIG. 1;
FIG. 4 is a schematic structural view of the stationary ring seat shown in FIG. 1;
in the figure, 1-static ring, 11-spiral groove on back of static ring, 2-static ring seat, 21-sector ring hole on static ring seat, 3-anti-rotation pin, 4-static torque sensor and 5-O type sealing ring.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting.
Referring to fig. 1-4, a first embodiment of an axial static ring sealing device for monitoring friction torque according to the present invention is shown, in which a static torque sensor 4 is used to monitor the friction torque of a static ring 1, and due to the presence of an O-ring 5, the present invention has a slight effect on the true value of the friction torque of the static ring, but the present invention monitors the stability of the relative value of the friction torque of the static ring, and reflects the operating state of the sealing end face through the stability of the friction torque.
In the present embodiment, referring to fig. 2-3, two symmetrical spiral grooves 11 are formed on the matching surface of the stationary ring 1 and the stationary ring seat 2, and replace the originally formed anti-rotation pin hole for connecting with the thread of the anti-rotation pin 3, and the two ends of the anti-rotation pin 3 are both formed with threads and respectively connected with the stationary ring 1 and the stationary torque sensor 4; when the sealing device operates, the static ring 1 receives certain friction torque due to the rotation with the rotating ring, and the friction torque received by the static ring 1 is transmitted to the static torque sensor 4 through the anti-rotation pin 3. The stationary ring 1 can also be used in other seals in cooperation with conventional anti-rotation pins.
In the embodiment, referring to fig. 4, a sector ring hole 21 is formed at the matching position of the stationary ring seat 2 and the anti-rotation pin, and an included angle between one side of the sector ring and the central line is set to be 3 degrees, which is enough to meet the movement trend of the anti-rotation pin 3, and does not affect the monitoring of the friction torque.
In this embodiment, referring to fig. 1, the static torque sensor 4 is fixedly installed on the back of the static ring seat 2, and the anti-rotation pin 3 is fixedly connected with the static torque sensor 5, so that the static ring 1 is subjected to a fixed force.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (5)

1. An axial sealing static ring device capable of monitoring friction torque is characterized by comprising a static ring, a static ring seat and an anti-rotation pin, wherein the static ring seat is used for fixing the static ring; the back of the sealing static ring is provided with a spiral groove, and two ends of the anti-rotation pin are also provided with spiral grooves which are fixedly connected through threads; the static ring seat is provided with an anti-rotation pin and an opening ring hole for extending the anti-rotation pin, and the static ring friction torque is transmitted to a static torque sensor fixed on the static ring seat to monitor the static ring friction torque.
2. The stationary ring device as claimed in claim 1, wherein the two spiral grooves on the back of the stationary ring are symmetrically formed, and the size of the spiral grooves is processed according to actual working conditions; the static ring can be used in other sealing devices, and a common anti-rotation pin is arranged in the spiral groove of the static ring.
3. The stationary ring device as claimed in claim 1, wherein the rotation preventing pin has one end screwed to the stationary ring and the other end screwed to the static torque sensor fixed to the stationary ring base.
4. The stationary ring device as claimed in claim 1, wherein the stationary ring seat has a sector ring through hole at the location where the rotation-preventing pin is fixed, and an included angle between one side of the sector ring and the center line is 3 °.
5. The stationary ring assembly as recited in claim 1, wherein the stationary ring seat has a fan ring through hole with a difference between a major diameter and a minor diameter greater than a diameter of the anti-rotation pin.
CN201910972490.4A 2019-10-14 2019-10-14 Axial sealing static ring device capable of being used for monitoring friction torque Pending CN110594417A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910972490.4A CN110594417A (en) 2019-10-14 2019-10-14 Axial sealing static ring device capable of being used for monitoring friction torque

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201910972490.4A CN110594417A (en) 2019-10-14 2019-10-14 Axial sealing static ring device capable of being used for monitoring friction torque

Publications (1)

Publication Number Publication Date
CN110594417A true CN110594417A (en) 2019-12-20

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112096879A (en) * 2020-09-30 2020-12-18 北京化工大学 Monitoring type dynamic pressure sealing device and method for monitoring opening and closing states of sealing end faces

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB602792A (en) * 1946-06-04 1948-06-02 Trist & Co Ltd Ronald Improvements in oil and like seals
CN102183327A (en) * 2011-02-23 2011-09-14 南京林业大学 Mechanical seal face friction torque measurement method
CN204214608U (en) * 2014-11-26 2015-03-18 南京林业大学 A kind of mechanical sealing performance tester can measuring axial force and temperature between seal face
CN106353024A (en) * 2015-01-15 2017-01-25 南京林业大学 Mechanical seal face friction torque measuring device based on piezoelectric effect and wireless data transmission
CN108692026A (en) * 2018-06-06 2018-10-23 中国石油大学(华东) A kind of axial end face stationary seal ring device
CN109141759A (en) * 2018-10-14 2019-01-04 南京林业大学 A kind of dynamic and static ring end face contact pressure real-time and precise regulating mechanism towards mechanical sealing performance tester
CN110132497A (en) * 2019-04-25 2019-08-16 北京化工大学 A kind of mechanical seal state monitoring apparatus
CN211398575U (en) * 2019-10-14 2020-09-01 中国石油大学(华东) Axial sealing static ring device capable of being used for monitoring friction torque

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB602792A (en) * 1946-06-04 1948-06-02 Trist & Co Ltd Ronald Improvements in oil and like seals
CN102183327A (en) * 2011-02-23 2011-09-14 南京林业大学 Mechanical seal face friction torque measurement method
CN204214608U (en) * 2014-11-26 2015-03-18 南京林业大学 A kind of mechanical sealing performance tester can measuring axial force and temperature between seal face
CN106353024A (en) * 2015-01-15 2017-01-25 南京林业大学 Mechanical seal face friction torque measuring device based on piezoelectric effect and wireless data transmission
CN108692026A (en) * 2018-06-06 2018-10-23 中国石油大学(华东) A kind of axial end face stationary seal ring device
CN109141759A (en) * 2018-10-14 2019-01-04 南京林业大学 A kind of dynamic and static ring end face contact pressure real-time and precise regulating mechanism towards mechanical sealing performance tester
CN110132497A (en) * 2019-04-25 2019-08-16 北京化工大学 A kind of mechanical seal state monitoring apparatus
CN211398575U (en) * 2019-10-14 2020-09-01 中国石油大学(华东) Axial sealing static ring device capable of being used for monitoring friction torque

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112096879A (en) * 2020-09-30 2020-12-18 北京化工大学 Monitoring type dynamic pressure sealing device and method for monitoring opening and closing states of sealing end faces

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