CN203203760U - Mechanical seal performance testing device - Google Patents
Mechanical seal performance testing device Download PDFInfo
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- CN203203760U CN203203760U CN 201320238515 CN201320238515U CN203203760U CN 203203760 U CN203203760 U CN 203203760U CN 201320238515 CN201320238515 CN 201320238515 CN 201320238515 U CN201320238515 U CN 201320238515U CN 203203760 U CN203203760 U CN 203203760U
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Abstract
The utility model provides a mechanical seal performance testing device including a main shaft, a working cavity provided with end caps on two ends and two groups of to-be-tested mechanical seals. A shaft sleeve is in clearance fit with the main shaft, and the shaft and the main shaft penetrate through the end caps on the two ends of the working cavity together. Two ends of the shaft sleeve protruded outside the end caps are provided with U-shaped openings on the same bus and transmission pins are arranged on the main shaft corresponding to the U-shaped openings. The middle part of the shaft sleeve is provided with two segments of threads with the same thread pitch and opposite turning directions. Movable ring base in the two to-be-tested mechanical seals are arranged on the back sides of two nuts threaded on the shaft sleeve. The movable ring bases and the shaft sleeve can slide relatively in an axial direction and are connected fixedly in a circumferential direction. The transmission pin is provided with a radial force sensor used for measuring end face friction torque indirectly. An axial force sensor used for measuring end face special pressure is arranged between the back side of a static ring and the end caps of the working cavity. The end caps are provided with annular grooves that are concentric with a central hole, so that a leakage cavity used for collecting leakage volume is formed. The mechanical seal performance testing device is suitable for using for testing mechanical seals in dimension series and under different pressure working conditions. For example, the mechanical seal performance testing device can be used for a performance test of a large-diameter mechanical seal under a high-pressure working condition.
Description
Technical field
The invention belongs to the sealing test technical field, be particularly related to a kind of shaftless mechanical sealing performance tester to additional force, moment of torsion Accurate Measurement, be applicable to comprise the performance test of major diameter mechanical seal of the rotating machineries such as stirred autoclave of large-scale compressor, centrifugal pump or the mixed high-voltage medium of conveying high-pressure medium.
Background technology
The maximization of process units, integrated, and long-term operation, require the stable mechanical seal of matching performance, for this reason, need to manufacture and design that running parameter is wide in range, the mechanical sealing performance tester of convenient test, to adapt to the development﹠ testing of mechanical sealing.
Can see from known technology, the spindle support structure of mechanical sealing performance tester is mainly single-cantilever axle, two cantilevered axle and double base axle form, and main shaft penetrates or the both sides end cap penetrates and passes working chamber from one-sided end cap.For single-cantilever shaft type mechanical seal test device, main shaft penetrates an end cap of working chamber, mechanical seal to be measured is as the seal of working chamber, close with the scene, such as patent ZL 00220907.1, but main-axis end is in the medium of working chamber, produce larger axial force, the dynamic and static rim bearing of simultaneously mechanical seal to be measured is not waited by the area of medium effect and also produces axial force, and large axial force impairs bearing life, different axial forces cause different bearing friction torques, finally affect the measuring accuracy of end-face friction moment of torsion; For single-cantilever, adopt main shaft to penetrate and pass working chamber both sides end cover type mechanical seal test device, avoided the axial force that medium can not cause at axle head in the working chamber, 2 groups of specifications, the mechanical seal to be measured of consistent size is arranged symmetrically in the working chamber, adopting an end to be processed with two sections pitch equates, the axle sleeve of hand of helix opposite threads, the left nut that the rotary sleeve drive screws with it and right nut are equidistantly left, move right, promote left, right two rotating seats compress respectively two rotating rings by spring, realized that face pressure equivalent loads, such as patent CN201210037262.6, but it is very difficult to make 2 groups of mechanical seals be symmetrical in the central cross-section of working chamber when initial placement.For the double cantalever type mechanical seal test device, such as patent ZL88214684.X, the axial force that pressure medium causes at single axle head and be subjected to the area of medium effect not wait the axial force that causes because of the dynamic and static rim bearing of mechanical seal to be measured, meeting is by its integrated symmetric structure institute balance, but its main shaft and propulsion system syndeton more complicated.Double base shaft type mechanical seal test device, such as patent CN201210126379.1, adopt main shaft to penetrate and pass working chamber both sides end cap, the mechanical seal to be measured of 2 groups of specifications, consistent size is arranged symmetrically in the working chamber, solved the equilibrium problem of axial reinforcing, and the winding degree of cantilevered axle impact, but very inconvenient when mechanical seal to be measured is installed, particularly be difficult to satisfy type approval test to the requirement of assembling and dissembling speed.
Above each prior art, during test, torque sensor is measured is total torque on the main shaft in the test unit, total torque comprises the friction torque of tested seal face and the friction torque in the main shaft supporting, total torque is deducted friction torque in the main shaft supporting of measuring before the test, then just can obtain the friction torque of tested seal face.Therefore not only process of the test is loaded down with trivial details, and has reduced the accuracy of test.
In addition, in above each prior art, what torque sensor was surveyed is the total torque on the main shaft in the test unit, and the startup total torque when starting be normally move total torque 5-7 doubly, thereby the stress axis diameter of the torque sensor that is equipped with is larger, utilize the less end-face friction moment of torsion of the mechanical seal of the normal operation of this torque sensor test, the axial strain of generation is less, and the accuracy of test is lower.In order to improve the precision of measurement, the stress axis diameter of torque sensor will be less, but the less stress axis of diameter easily produces again plastic yield, even fracture.So can't eat one's cake and have it.
Summary of the invention
The purpose of present technique provides a kind ofly can realize that 2 groups of mechanical seals to be measured are in place about the automatic symmetry of working chamber central cross-section, the equivalent of face pressure is regulated, the additional axial force that medium causes when avoiding testing, improve simultaneously the mechanical sealing performance tester of the accuracy of on-the-spot installation exercise and end-face friction torque measurement, it can be used in performance study and the type approval test of major diameter mechanical seal under the high pressure operating mode.
The mechanical sealing performance tester of present technique comprises that main shaft 4, two ends have the working chamber 18 of end cap, 2 groups of mechanical seals to be measured; Each mechanical seal to be measured comprises stationary ring O shape circle 71, stationary ring 72, rotating ring 73, rotating ring O shape circle 74, filler ring 75, spring 76, rotating seat 77; Rotating ring 73 and rotating seat 77 link to each other in circumferential location endwisely slipping, and be disposed with spring 76, filler ring 75, rotating ring O shape and enclose 74 between rotating seat 77 and rotating ring 73; Filler ring 75 is being in axial sliding connection with rotating seat 77; Stationary ring 72 links to each other with center pit sealing on the end cap by the stationary ring O shape circle 71 that is arranged on stationary ring 72 peripheries; Stationary ring 72 and rotating ring 73 are axially relative;
Be sleeved on the main shaft 4 with the axle sleeve 5 of main shaft 4 clearance fit, axle sleeve 5 passes the end cap at working chamber 18 two ends; The two ends that axle sleeve 5 stretches out end cap offer the U-shaped opening 23 on same bus, are provided with trundle at the main shaft 4 corresponding to U-shaped opening 23 places; There is the screw thread that two sections pitch equate, rotation direction is opposite at axle sleeve 5 middle parts; Two nuts respectively with described threaded engagement; The short pin 10 parallel with axle sleeve 5 axis stretches in the short pin-and-hole of opening on two nuts simultaneously; The dorsal part of two nuts is respectively two rotating seats 77 in the mechanical seal to be measured; Rotating seat 77 and axle sleeve link to each other in circumferential location endwisely slipping; Stationary ring 72, rotating ring 73 are all around axle sleeve;
The radial force sensor of amount of force between being provided with for detection of U-shaped opening sidewalls and trundle between U-shaped opening sidewalls and the trundle; Have the fabrication hole that passes for the technique axle at least one end cap, the technique shaft extension of passing fabrication hole enters in the short pin-and-hole; Fabrication hole is by dismountable fabrication hole plug 24 sealings.
During test operation, first two nuts are screwed two sections screw thread places to the axle sleeve, in the short pin-and-hole that short pin 10 is inserted on left nut 8, the right nut 11, so that two nuts circumferential location each other; Then rotating seat 77, spring 76, filler ring 75, rotating ring O shape circle 74, rotating ring 73 symmetries with 2 groups of mechanical seals are filled on the axle sleeve 5; Two stationary rings 72 with stationary ring O shape circle 71 are respectively charged into the center pit of 2 end caps, to be connected in an end cap (such as the left end cap in left side) of stationary ring 72 on the end face (such as the left side in left side) of working chamber 18 again, mobile working chamber 18, make working chamber 18 pass main shaft 4, the axle sleeve 5 that two nuts, rotating ring 73 etc. will be housed again is set on the main shaft 4, cover another end cap (such as the right end cap on right side) with stationary ring 72, this another end cap is connected in the other end (such as the right side on right side) of working chamber 18; Main shaft 4 and axle sleeve 5 pass respectively two end caps.
The technique axle is passed fabrication hole on the end cap insert short pin-and-hole on the nut, prevent nut rotation, then rotary axle box 5, drive and two nuts that axle sleeve screws opposing and go (distance between two nuts increases gradually), the rotating seat 77 that promotes 2 groups of mechanical seals presses to respectively rotating ring O shape circle 74 and rotating ring 73 by spring 76, filler ring 75, until rotating ring 73 compresses stationary ring 72, obtain certain face pressure; Certainly, if opposite spin axle sleeve 5 drives with its two nuts that screw and go in the same direction (distance between two nuts reduces gradually), spring 76 recovers to free state from compressive state, and face pressure reduces until zero or the disengagement of dynamic and static ring; During rotary sleeve 5, two nuts move axially, do not rotate with respect to 4 on main shaft.
Because axle sleeve 5 is shaftless to the location on main shaft, when the initial position of axle sleeve 5 center cross-sectional does not overlap with working chamber 18 center cross-sectional, be that the initial position of axle sleeve 5 center cross-sectional and stationary ring 72 end face distances on two end caps are not when waiting, rotary sleeve 5 drives two opposing movements of nut that screw with it, promote the rotating seat 77 of 2 groups of mechanical seals by spring 76, filler ring 75 presses to respectively rotating ring O shape circle 74 and rotating ring 73, the one group of mechanical seal that is depressed into first stationary ring 72 will promote axle sleeve 5 and move to another group mechanical seal direction, until the rotating ring 73 of another group mechanical seal, stationary ring 72 contacts, then, the face pressure of two groups of mechanical seals together increases.Therefore, rotary sleeve 5 can make axle sleeve 5 automatic centerings, and makes 2 groups of mechanical seals obtain identical initial face pressure.Rotating ring O shape circle 74 sealings that guaranteed between rotating ring and the axle sleeve between filler ring 75 and the rotating ring 73.
Afterwards, U-shaped opening 23 places corresponding to axle sleeve on main shaft load onto trundle, pull down the technique axle, with technique plug sealing technology hole.Utilize external medium to load with the circulation system toward the interior test(ing) medium that injects certain pressure of working chamber.
Then drive shaft is rotated, and main shaft drives axle sleeve by trundle and rotates.Because can only move axially and can not rotate with respect to axle sleeve, so rotating seat just rotates with axle sleeve, drive rotating ring and just be pressed on the rotation of doing on the stationary ring with respect to stationary ring.Because the axle sleeve and the friction torque between the main shaft that are sleeved on the main shaft are very little, the end-face friction moment of torsion has passed to main shaft by axle sleeve with substantially having no loss.Can obtain friction torque (the end-face friction moment of torsion of mechanical seal) between rotating ring and the stationary ring by measuring moment of torsion that axle sleeve or main shaft be subject to.
In order to record the end-face friction moment of torsion of mechanical seal, at the radial force sensor that is provided for detecting amount of force between U-shaped opening sidewalls and the trundle between U-shaped opening sidewalls and the trundle.
Record acting force between U-shaped opening sidewalls and the trundle by the radial force sensor, this acting force be multiply by the arm of force (application point of power is to the distance of axle sleeve axis) can obtain the moment of torsion that main shaft or axle sleeve are subject to.
Liquid weighing by the center pit from end cap is flowed out can draw the leakage rate of mechanical seal.
Therefore, the invention has the beneficial effects as follows:
(1) adopt the axle sleeve that runs through working chamber that 2 groups of mechanical seals to be measured are installed, so that pressure medium acts on voluntarily balance of the axial force that causes in 2 groups of mechanical seals and spring force, the axial force of having avoided pressure medium to produce at axle head, be applicable to various pressure working conditions, various sizes series, comprise the performance test of high pressure operating mode major diameter mechanical seal.
(2) axle sleeve cooperates with gap of main reinforcement, and is shaftless to the location on axle, realized being installed on the automatic adjusting centering of mechanical seal in working chamber on the axle sleeve.When the initial position of axle sleeve center cross-sectional does not overlap with the working chamber center cross-sectional, be that the initial position of axle sleeve center cross-sectional and the stationary ring end face distance on the left and right end cap be not when waiting, rotary sleeve drives two opposing movements of nut that screw with it, the rotating seat 11 that promotes 2 groups of mechanical seals presses to respectively rotating ring O shape circle and rotating ring by spring, filler ring, the one group of mechanical seal that is depressed into first stationary ring promotes axle sleeve and moves to another group mechanical seal direction, until the face pressure of two groups of mechanical seals identical till.
(3) realized the accurate measurement of mechanical seal face friction torque.2 groups of mechanical seals are installed in clearance fit on the axle sleeve of main shaft, and the end-face friction moment of torsion has passed to main shaft by axle sleeve with having no loss.The power that records by the radial force sensor draws the end-face friction moment of torsion more as calculated, has guaranteed the accuracy that mechanical seal face friction torque is measured.
(4) 2 set up the vertical mechanical seal to be measured that certain face pressure is arranged, and have consisted of the soft underprop of main shaft, have increased the stability of cantilevered main shaft operation.
(5) adopt the mean value of the leakage rate of 2 groups of mechanical seal accumulation to characterize single leakage rate of organizing mechanical seal, adopt the mean value of 2 groups of mechanical seal face friction torques as the end-face friction moment of torsion of single group mechanical seal, reduced the impact that randomness is brought measurement.
(6) mounting or dismounting are convenient.Reinstall working chamber after 2 groups of mechanical seals are loaded onto axle sleeve, make the face pressure balance of 2 groups of mechanical seals by rotary sleeve, just determined axle sleeve at main shaft and mechanical seal the position in working chamber; Open right end cap, pull down the trundle on the main shaft right-hand member, just removable Lower shaft sleeve and top mechanical seal thereof.
(7) by changing the axle sleeve of different structure size, so that the model of axle sleeve and mechanical seal to be measured, size are mated the performance test that can carry out the mechanical seal of different size model.
Above-mentioned mechanical sealing performance tester passes end cap for detection of at least two axial force transducers 14 of stationary ring 72 suffered axial force sizes, and with the contacting of stationary ring 72 back sides relative with rotating ring 73; Described axial force transducer 14 is distributed on the circumferential of stationary ring 72.In the working chamber during without medium, each axial force transducer 14 that is arranged on a stationary ring 72 of supporting on the end cap 13 axially bears and maintains the spring force that rotating ring 73 and stationary ring 72 are fitted; After filling pressure medium in the working chamber, each axial force transducer 14 of a stationary ring 72 of supporting axially bears spring force and pressure medium is organized the axial force sum that mechanical seal causes at list.By axial force transducer, can change with the rear operating face pressure of monitoring loading by the initial spring pressure of Measurement accuracy mechanical seal.
Above-mentioned mechanical sealing performance tester, the short pin-and-hole on short pin 10 and two nuts is clearance fit, with reduce two nuts relative to short pin shaft to the resistance that moves.
Above-mentioned mechanical sealing performance tester, rotating seat 77 links to each other by dive key 12 with axle sleeve 5.
Above-mentioned mechanical sealing performance tester has on the nut in the pilot hole, and the axis of pilot hole is parallel to the axis of axle sleeve; The technique axle that passes fabrication hole extend in the short pin-and-hole or extend in the pilot hole.Fabrication hole, pilot hole and short pin-and-hole are all symmetrical with the axle sleeve axis.
Above-mentioned mechanical sealing performance tester, axle sleeve 5 is symmetrical with its center cross-sectional; Two mechanical seals to be measured are arranged symmetrically in the both sides of the center cross-sectional of axle sleeve 5.All the center cross-sectional with axle sleeve 5 is symmetrical for axle sleeve and two mechanical seals to be measured like this, so that pressure medium acts on voluntarily balance of the axial force that causes in 2 groups of mechanical seals and spring force, has avoided pressure medium to produce axial force at main shaft or axle sleeve.
Above-mentioned mechanical sealing performance tester offers the annular groove concentric with center pit on the end cap, consist of to leak chamber 16, and the pod apertures 17 of tangential direction is offered in the annular groove bottom, is used for collection and the discharging of the leakage rate of mechanical seal.
Above-mentioned mechanical sealing performance tester, described radial force sensor are wireless radial force sensor.
Above-mentioned mechanical sealing performance tester, main shaft 4 links to each other with motor 1 by bearing housing 3, shaft coupling 2, and described motor 1 is by variable-frequence governor control, and realization speed is regulated.
Description of drawings
Fig. 1 is a kind of axial plane cut-open view of mechanical sealing performance tester.
Fig. 2 is the enlarged diagrams such as the axle sleeve among Fig. 1, mechanical seal to be measured.
Fig. 3 is that a kind of mechanical sealing performance tester axial plane cut-open view in the adjustment process is installed in mechanical seal to be measured.
Fig. 4 is a kind of A-A face cut-open view of mechanical sealing performance tester.
Among the figure: the 1-motor; The 2-shaft coupling; The 3-bearing housing; The 4-main shaft; The 5-axle sleeve; The 6-left end cap; 7-mechanical seal to be measured (71-stationary ring O shape circle; The 72-stationary ring; The 73-rotating ring; 74-rotating ring O shape circle; The 75-filler ring; The 76-spring; The 77-rotating seat); The left nut of 8-; The short pin-and-hole plug of 9-; The short pin of 10-; The right nut of 11-; The 12-dive key; The 13-right end cap; The 14-axial force transducer; The 15-trundle; 16-leaks the chamber; The 17-pod apertures; The 18-working chamber; The 19-planker; The 20-support; 22-technique axle; 23-U shape opening; 24-fabrication hole plug; The 25-pilot hole.
Embodiment
The utility model is described in further detail below in conjunction with the drawings and specific embodiments.
For further understanding content of the present utility model, Characteristic, hereby exemplify following examples, and cooperate accompanying drawing to be described in detail as follows:
Fig. 1,2 shows a kind of mechanical sealing performance tester, comprises motor 1, shaft coupling 2, bearing housing 3, main shaft 4, trundle 15, axle sleeve 5, left end cap 6, fabrication hole plug 24, technique axle 22, axial force transducer 14, mechanical seal to be measured (stationary ring O shape circle 71, stationary ring 72, rotating ring 73, rotating ring O shape circle 74, filler ring 75, spring 76, rotating seat 77), dive key 12, left nut 8, right nut 11, short pin 10, short pin-and-hole plug 9, working chamber 18, right end cap 13, planker 19, support 20.
Offer the annular groove concentric with center pit on left end cap 6, the right end cap 13, consist of and leak chamber 16, the pod apertures 17 of tangential direction is offered in the annular groove bottom, is used for collection and the discharging of the leakage rate of mechanical seal.Adopt the mean value of 2 groups of mechanical seals leakage rate of accumulation in leaking chamber 16 to characterize the leakage rate of mechanical seal.Adopt acting force that the radial force sensor records again as calculated the mean value of 2 of gained groups of mechanical seal face friction torques as the end-face friction moment of torsion of single group mechanical seal.Employing is identical along the circumferential model that evenly arranges on left end cap 6, right end cap 13, its force-detecting position is measured the face pressure of rotating ring 73, stationary ring 72 applyings apart from contour 3 axial force transducers 14 of the corresponding end face of left and right end cap.
Be rotated counterclockwise axle sleeve 5 drive the left nut 8 that screws with it and right nut 11 respectively equidistantly to the right, be moved to the left, spring 76 recovers to free state from compressive state, face pressure reduces until zero or the disengagement of dynamic and static ring; During rotary sleeve 5, left nut 8 and right nut 11 be not with respect to 4 movements of main shaft, rotate.
By the control of variable-frequence governor to motor 1, realization main shaft 4 is worked under different rotating speeds.By changing the physical dimension of axle sleeve 5, the performance test that can carry out the mechanical seal of different size model.
Fig. 3 is that a kind of mechanical sealing performance tester axial plane cut-open view in the adjustment process is installed in mechanical seal to be measured.With the axle sleeve 5 of main shaft 4 clearance fit, shaftless to the location on main shaft.When the initial position of axle sleeve 5 center cross-sectional does not overlap with working chamber 18 center cross-sectional, be initial position and the left end cap 6 of axle sleeve 5 center cross-sectional, when stationary ring 72 end face distances on the right end cap 13 do not wait, technique axle 22 is inserted in the fabrication hole of the short pin-and-hole of left nuts 8 and right nut 11 and left end cap 6 and right end cap 13, the left nut 8 that axle sleeve 5 drives that turn clockwise screw with it and right nut 11 are respectively equidistantly left, move right, promote the rotating seat 77 of 2 groups of mechanical seals by spring 76, filler ring 75 presses to respectively rotating ring O shape circle 74 and rotating ring 73, the one group of mechanical seal that is depressed into first stationary ring 72 will promote axle sleeve 5 and move to another group mechanical seal direction, until the rotating ring 73 of another group mechanical seal, stationary ring 72 contacts, then, the face pressure of 2 groups of mechanical seals together increases.
During test operation, first left nut 8, right nut 11 are screwed to the screw thread place at axle sleeve 5 middle parts, in the hole on the left nut 8 of short pin 10 insertions, the right nut 11, screw in again short pin-and-hole plug 11, consist of left nut 8, right nut 11 and circumferentially locate each other.Then, rotating seat 77, spring 76, filler ring 75, rotating ring O shape circle 74, rotating ring 73 symmetries with dive key 12, mechanical seal are filled on the axle sleeve 5; Stationary ring 72 with stationary ring O shape circle 71 is respectively charged into left end cap 6, right end cap 13, to be connected on the left side of working chamber 18 with the left end cap 6 usefulness bolts of axial force transducer 14 and stationary ring 72 again, mobile working chamber 18, make left end cap 6, working chamber 18 pass main shaft 4, the axle sleeve 5 that left nut 8, right nut 11, dive key 12 and mechanical sealing linkage ring 73 will be housed again is set on the main shaft 4, cover the right end cap 13 with axial force transducer 14 and stationary ring 72, and be connected in the right side of working chamber 18 with bolt; At this moment, main shaft 4 and axle sleeve 5 pass right end cap 13.
In the fabrication hole with the pilot hole 25 on the technique axle 22 left nuts 8 of insertion and the right nut 11 and left end cap 6 and right end cap 13, axle sleeve 5 turns clockwise, make axle sleeve 5 automatic centerings, and make mechanical seal obtain required initial face pressure, U-shaped opening 23 places corresponding to axle sleeve on main shaft load onto trundle 15, pull down technique axle 22(certain, also can in short pin-and-hole, take out short pin-and-hole plug 11, technique axle 22 is passed the fabrication hole on left end cap 6 and the right end cap 13 and insert in two upper short pin-and-holes of left nut 8 and right nut 11, axle sleeve 5 turns clockwise, make axle sleeve 5 automatic centerings, and make mechanical seal obtain required initial face pressure, U-shaped opening 23 places corresponding to axle sleeve on main shaft load onto trundle 15, pull down technique axle 22, and then it is interior that short pin-and-hole plug 11 is inserted short pin-and-hole), at left end cap 6, tighten fabrication hole plug 24 in the fabrication hole on the right end cap 13.Utilize external medium to load the test(ing) medium that injects certain pressure with the circulation system in the working chamber, can obtain the operative end surface specific pressure of mechanical seal by axial force transducer 14.
Starter motor 1 is regulated frequency converter, and mechanical seal is worked under required rotating speed, records acting force and can draw end-face friction moment of torsion and the leakage rate of mechanical seal to accumulation in leaking chamber 16 through the liquid weighing of pod apertures 17 outflows by the radial force sensor.
The moment of torsion (acting force that the radial force sensor records multiply by the arm of force (application point of power is to the distance of axle sleeve axis)) that indirectly records by the radial force sensor with pass to the mechanical sealing linkage ring 73 of axle sleeve 5 by spring 76, rotating seat 77, the end-face friction moment of torsion of stationary ring 72 equates, adopts the mean value of 2 groups of mechanical seal face friction torques that the radial force sensor records indirectly as the end-face friction moment of torsion of single group mechanical seal.If only at a trundle radial force sensor is set, the moment of torsion that indirectly records by this radial force sensor namely is the end-face friction moment of torsion of single group mechanical seal divided by 2.If a radial force sensor respectively is set on two trundles, the moment of torsion sum that indirectly records of two radial force sensors namely is the end-face friction moment of torsion of single group mechanical seal divided by 2 more so.
Advantage and good effect that the present invention has are:
(1) mechanical seal to be measured of adopting the axle sleeve about the center cross-sectional structural symmetry run through working chamber that 2 groups of same sizes are installed, so that pressure medium acts on voluntarily balance of the axial force that causes in 2 groups of mechanical seals and spring force, the axial force of having avoided pressure medium to produce at axle head, be applicable to various pressure working conditions, various sizes series, comprise the performance test of high pressure operating mode major diameter mechanical seal.
(2) axle sleeve cooperates with gap of main reinforcement, and is shaftless to the location on axle, realized being installed on the automatic adjusting centering of mechanical seal in working chamber on the axle sleeve.When the initial position of axle sleeve center cross-sectional does not overlap with the working chamber center cross-sectional, be that the initial position of axle sleeve center cross-sectional and the stationary ring end face distance on the left and right end cap be not when waiting, rotary sleeve drive the left nut screw with it and right nut respectively equidistantly left, move right, the rotating seat that promotes 2 groups of mechanical seals presses to respectively rotating ring O shape circle and rotating ring by spring, filler ring, the one group of mechanical seal that is depressed into first stationary ring promotes axle sleeve and moves to another group mechanical seal direction, until the face pressure of two groups of mechanical seals identical till.
(3) realized the accurate measurement of mechanical seal end surface rubbing wear moment of torsion.2 groups of mechanical seals are installed in clearance fit on the axle sleeve of main shaft, the end face frictional wear moment of torsion passes to by axle sleeve with having no to lose and is arranged on the trundle that is arranged in axle sleeve two ends U-shaped opening on the main shaft, has guaranteed the accuracy that mechanical seal face friction torque is measured.
(4) axial force transducer that arranges at left and right end cap can load the initial spring pressure of mechanical seal and the operating face pressure variation of monitoring by Measurement accuracy.
(5) adopt the mechanical seal identical, that face pressure is identical of 2 packet sizes to test together, adopt the mean value of the leakage rate of 2 groups of mechanical seal accumulation to characterize single leakage rate of organizing mechanical seal, adopt the mean value of 2 groups of mechanical seal face friction torques as the end-face friction moment of torsion of single group mechanical seal, reduced the impact that randomness is brought measurement.
Claims (10)
1. a mechanical sealing performance tester comprises that main shaft (4), two ends have the working chamber (18) of end cap, 2 groups of mechanical seals to be measured; Each mechanical seal to be measured comprises stationary ring O shape circle (71), stationary ring (72), rotating ring (73), rotating ring O shape circle (74), filler ring (75), spring (76), rotating seat (77); Rotating ring (73) and rotating seat (77) link to each other in circumferential location endwisely slipping, and be disposed with spring (76), filler ring (75), rotating ring O shape and enclose (74) between rotating seat (77) and rotating ring (73); Filler ring (75) is being in axial sliding connection with rotating seat (77); Stationary ring (72) links to each other with center pit sealing on the end cap by the stationary ring O shape circle (71) that is arranged on stationary ring (72) periphery; Stationary ring (72) and rotating ring (73) are axially relative; It is characterized in that:
Be sleeved on the main shaft (4) with the axle sleeve (5) of main shaft (4) clearance fit, axle sleeve (5) passes the end cap at working chamber (18) two ends; The two ends that axle sleeve (5) stretches out end cap offer the U-shaped opening (23) on same bus, are provided with trundle at the main shaft (4) of locating corresponding to U-shaped opening (23); There is the screw thread that two sections pitch equate, rotation direction is opposite at axle sleeve (5) middle part; Two nuts respectively with described threaded engagement; The short pin (10) parallel with axle sleeve (5) axis stretches in the short pin-and-hole of opening on two nuts simultaneously; The dorsal part of two nuts is respectively two rotating seats (77) in the mechanical seal to be measured; Rotating seat (77) and axle sleeve link to each other in circumferential location endwisely slipping; Stationary ring (72), rotating ring (73) are all around axle sleeve;
The radial force sensor of amount of force between being provided with for detection of U-shaped opening sidewalls and trundle between U-shaped opening sidewalls and the trundle; Have the fabrication hole that passes for the technique axle at least one end cap, the technique shaft extension of passing fabrication hole enters in the short pin-and-hole; Fabrication hole is sealed by dismountable fabrication hole plug (24).
2. mechanical sealing performance tester as claimed in claim 1, it is characterized in that: at least two axial force transducers (14) for detection of the suffered axial force size of stationary ring (72) pass end cap, and contact with the back side of the stationary ring (72) relative with rotating ring (73); Described axial force transducer (14) is distributed on the circumferential of stationary ring (72).
3. mechanical sealing performance tester as claimed in claim 1 is characterized in that: short pin (10) is clearance fit with short pin-and-hole on two nuts.
4. mechanical sealing performance tester as claimed in claim 1, it is characterized in that: rotating seat (77) links to each other by dive key (12) with axle sleeve (5).
5. mechanical sealing performance tester as claimed in claim 1, it is characterized in that: have on the nut in the pilot hole, the axis of pilot hole is parallel to the axis of axle sleeve; The technique axle that passes fabrication hole extend in the short pin-and-hole or extend in the pilot hole.
6. mechanical sealing performance tester as claimed in claim 5 is characterized in that: fabrication hole, pilot hole and short pin-and-hole are all symmetrical with the axle sleeve axis.
7. mechanical sealing performance tester as claimed in claim 1 is characterized in that: axle sleeve (5) is symmetrical with its center cross-sectional; Two mechanical seals to be measured are arranged symmetrically in the both sides of the center cross-sectional of axle sleeve (5).
8. mechanical sealing performance tester as claimed in claim 1, it is characterized in that: offer the annular groove concentric with center pit on the end cap, consist of and leak chamber (16), the pod apertures (17) of tangential direction is offered in the annular groove bottom, is used for collection and the discharging of the leakage rate of mechanical seal.
9. mechanical sealing performance tester as claimed in claim 1, it is characterized in that: described radial force sensor is wireless radial force sensor.
10. mechanical sealing performance tester as claimed in claim 1 is characterized in that: main shaft (4) links to each other with motor (1) by bearing housing (3), shaft coupling (2), and described motor (1) is controlled by variable-frequence governor, the adjusting of realization speed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320238515 CN203203760U (en) | 2013-05-06 | 2013-05-06 | Mechanical seal performance testing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320238515 CN203203760U (en) | 2013-05-06 | 2013-05-06 | Mechanical seal performance testing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203203760U true CN203203760U (en) | 2013-09-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320238515 Withdrawn - After Issue CN203203760U (en) | 2013-05-06 | 2013-05-06 | Mechanical seal performance testing device |
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| Country | Link |
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| CN (1) | CN203203760U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103267613A (en) * | 2013-05-06 | 2013-08-28 | 南京林业大学 | Mechanical seal performance testing device |
| CN104330223A (en) * | 2014-11-26 | 2015-02-04 | 南京林业大学 | Mechanical sealing property testing device and method for measuring axial force and temperature of sealed end surfaces |
| CN109752141A (en) * | 2019-01-30 | 2019-05-14 | 北京星际荣耀空间科技有限公司 | A kind of mechanical seal product testing processing unit (plant) and method |
| CN114279610A (en) * | 2021-12-06 | 2022-04-05 | 北京航天动力研究所 | Device and method for measuring specific pressure of mechanical seal end face of turbopump of liquid rocket engine |
-
2013
- 2013-05-06 CN CN 201320238515 patent/CN203203760U/en not_active Withdrawn - After Issue
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103267613A (en) * | 2013-05-06 | 2013-08-28 | 南京林业大学 | Mechanical seal performance testing device |
| WO2014180152A1 (en) * | 2013-05-06 | 2014-11-13 | 南京林业大学 | Performance test device for mechanical seal |
| CN103267613B (en) * | 2013-05-06 | 2015-08-19 | 南京林业大学 | A kind of mechanical sealing performance tester |
| US9631990B2 (en) | 2013-05-06 | 2017-04-25 | Nanjing Forestry University | Device for testing mechanical seal performance |
| CN104330223A (en) * | 2014-11-26 | 2015-02-04 | 南京林业大学 | Mechanical sealing property testing device and method for measuring axial force and temperature of sealed end surfaces |
| CN109752141A (en) * | 2019-01-30 | 2019-05-14 | 北京星际荣耀空间科技有限公司 | A kind of mechanical seal product testing processing unit (plant) and method |
| CN114279610A (en) * | 2021-12-06 | 2022-04-05 | 北京航天动力研究所 | Device and method for measuring specific pressure of mechanical seal end face of turbopump of liquid rocket engine |
| CN114279610B (en) * | 2021-12-06 | 2023-07-14 | 北京航天动力研究所 | Device and method for measuring specific pressure of mechanical seal end face of turbopump of liquid rocket engine |
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