CN114674539B - Eccentric adjusting device in oil seal torque test - Google Patents
Eccentric adjusting device in oil seal torque test Download PDFInfo
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- CN114674539B CN114674539B CN202210266415.8A CN202210266415A CN114674539B CN 114674539 B CN114674539 B CN 114674539B CN 202210266415 A CN202210266415 A CN 202210266415A CN 114674539 B CN114674539 B CN 114674539B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/0028—Force sensors associated with force applying means
- G01L5/0042—Force sensors associated with force applying means applying a torque
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
- G01M13/005—Sealing rings
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
Abstract
The invention relates to an eccentric adjusting device in oil seal torque test, and belongs to the field of rotary seal ring tests. The device comprises a fixed bracket, an eccentric adjusting end, a front supporting end, a rear supporting end and a testing end. The fixed support is fixedly connected with the ground, the eccentric adjusting end is connected with the fixed support through a dovetail groove, vertical movement can be achieved, the front supporting end and the rear supporting end are respectively and fixedly connected with the fixed support through threads, and the testing end is located between the front supporting end and the rear supporting end and fixedly connected with the front supporting end and the rear supporting end through threads. The front support end and the rear support end are fastened and connected with the fixed support through bolts, so that the function of supporting the test end is achieved, and the problem that the oil seal is stressed unevenly under the non-eccentric state due to too large weight after lubricating oil is filled in the sealing cavity is solved; according to the invention, the front support end and the rear support end are respectively provided with the deep groove ball bearings, so that the shell of the sealing cavity of the test end can deflect circumferentially during testing, and then the swing rod can squeeze the tension-compression sensor.
Description
Technical Field
The invention belongs to the field of rotary seal ring tests, and particularly relates to an eccentric adjusting device in oil seal torque test.
Background
Friction torque of an oil seal is one of important indexes of performance. Because a layer of lubricating oil film exists between the oil seal and the rotating shaft, the friction torque of the oil seal is very small, the high-precision torque tester is high in price, and the torque tester and the rotating shaft possibly have deviation when being installed, so that the test result is inaccurate.
Aiming at the problem of small friction torque of an oil seal, an indirect measurement method is adopted: a swinging rod is fixedly connected to a sleeve of the oil seal testing cavity, and the other end of the swinging rod is free and contacts with a contact point of a tension-compression sensor. The tension-compression sensor technology is mature, the measurement accuracy is high, and the product of the stress value obtained by the test and the effective length of the swing rod is the oil seal friction torque. This method has a necessary condition: the oil seal testing end is required to be in a 'suspension' state, so that the testing end can deflect to drive the deflection of the swing rod. When the oil seal testing end is in a 'suspension' state, 2 problems exist, namely: the weight of the oil seal test cavity is too large after lubricating oil is filled in the oil seal test cavity, so that the oil seal is stressed unevenly under the non-eccentric state; and a second problem: when the radial displacement of the rotating shaft is regulated to simulate the eccentric amount, the testing end moves along with the shaft in a 'suspension' state, and the oil seal friction torque in the eccentric state cannot be tested. The problems that the friction torque test result of the oil seal in the eccentric state is inaccurate and the like at present are caused.
Disclosure of Invention
First, the technical problem to be solved
The invention aims to solve the technical problems of incapability of adjusting eccentricity and inaccurate test when an oil seal applies a lever principle to test torque by providing an eccentricity adjusting device in oil seal torque test.
(II) technical scheme
In order to solve the technical problems, the invention provides an eccentric adjusting device in oil seal torque test, which comprises a fixed support, an eccentric adjusting end, a front supporting end, a rear supporting end and a testing end, wherein the fixed support is connected with the ground, the eccentric adjusting end is connected with the fixed support through a dovetail groove, the front supporting end and the rear supporting end are respectively and fixedly connected with the fixed support through threads, and the testing end is positioned between the front supporting end and the rear supporting end and fixedly connected with the front supporting end and the rear supporting end through threads.
Further, the testing end comprises a sealing cavity shell (1), a visual window (2), a swinging rod (3) and a tension-compression sensor (4), wherein the visual window (2) is fastened on the sealing cavity shell (1) through threaded connection, two ends of the sealing cavity shell (1) are fastened and connected with labyrinth seal groups on two sides through bolts, and an air inlet and an oil inlet are formed in the sealing cavity shell (1); the swing rod (3) is vertically positioned at the lower side of the sealed cavity shell (1), one end of the swing rod is welded on the sealed cavity shell (1) while the other end is free, and a tension and compression sensor (4) is arranged at the right side of the free end of the swing rod (3); the visual window (2) is made of visual glass, and the tension and compression sensor (4) is fastened on the fixed support (11) through bolts.
Further, the contact level of the tension and compression sensor (4) is the same as the free end level of the swing rod (3).
Further, the eccentric adjusting end comprises a screw cap (5), a pin shaft (6), a screw rod (7), a flange (8), a sleeve (9) and a screw rod seat (10), wherein the screw rod (7) vertically penetrates through the sleeve (9) to be connected with the screw cap (5) and the screw rod seat (10): the middle part of the screw rod (7) is fixedly connected with the sleeve (9) through the pin shaft (6), the upper end of the screw rod (7) is inserted into the screw cap (5) and concentric with the screw cap, the pin shaft (6) penetrates through the screw cap (5) and the screw rod (7), the lower end of the screw rod (7) is in threaded fit with the screw rod seat (10), and the screw rod seat (10) is fastened on the fixed support (11) through bolts.
Further, when the nut (5) rotates clockwise, the screw (7) moves upwards through threaded fit with the fixed screw seat (10) and drives the sleeve (9) to vertically move upwards; when the screw cap (5) rotates anticlockwise, the screw (7) moves downwards through threaded fit with the fixed screw seat (10) and drives the sleeve (9) to vertically move downwards.
Further, when the eccentricity is regulated, a nut (5) in the eccentric regulating end rotates, a screw (7) moves up and down through threaded cooperation with a fixed screw seat (10) and drives a sleeve (9) to vertically move up and down, and the sleeve (9) drives a bearing and a rotating shaft to move together; the testing end is limited by the front supporting end and the rear supporting end in the radial direction and does not move along with the radial movement of the rotating shaft, and finally the tested oil seal generates eccentric quantity.
Further, the front support end comprises a front bearing seat (12), a large-diameter deep groove ball bearing (13), a front bearing end cover (16) and a front labyrinth seal group, wherein the front bearing seat (12) is fastened on the fixed bracket (11) through bolts, and the large-diameter deep groove ball bearing (13) is arranged in a groove of the front bearing seat (12) and is contacted with the groove through a bearing outer ring; the right side of the large-diameter deep groove ball bearing (13) is provided with a front bearing end cover (16), and the bearing end cover is fastened at a position vertically above a groove of the front bearing seat (12) through bolts; the inner ring of the large-diameter deep groove ball bearing (13) is in contact fit with the static ring (14) of the front labyrinth seal group, the front labyrinth seal group moving ring (15) is installed on the shaft in an interference fit mode, and the front labyrinth seal group moving ring (15) and the static ring (14) are installed in a clearance fit mode.
Further, the rear support end comprises a rear bearing seat (21), a small-diameter deep groove ball bearing (19), a rear bearing end cover (20) and a rear labyrinth seal group, wherein the rear bearing seat (21) is fastened on the fixed support (11) through bolts, a groove is formed in the left end part of the rear bearing seat (20), and the small-diameter deep groove ball bearing (19) is installed in the groove and contacts with the groove through a bearing inner ring; the rear labyrinth seal group static ring (17) is provided with a groove, the inner ring of the groove is in contact fit with the outer ring of the small-diameter deep groove ball bearing (19), the right side of the bearing is provided with a rear bearing end cover (20), and the end cover is fastened at a position vertically above the groove of the rear labyrinth seal group static ring (17) through bolts; the rotating shaft is provided with a rear labyrinth seal group moving coil (18) in an interference mode, and the rear labyrinth seal group moving coil (18) and a rear labyrinth seal group static coil (17) are installed in a clearance fit mode.
Further, the inner diameter of the rear bearing seat (21) is 10mm larger than the outer diameter of the rear labyrinth seal moving coil (18).
Further, the eccentric adjusting end vertically moves up and down along the dovetail groove.
(III) beneficial effects
The invention provides an eccentric adjusting device in oil seal torque test. The fixed support is fixedly connected with the ground, the eccentric adjusting end is connected with the fixed support through a dovetail groove, vertical movement can be achieved, the front supporting end and the rear supporting end are respectively and fixedly connected with the fixed support through threads, and the testing end is located between the front supporting end and the rear supporting end and fixedly connected with the front supporting end and the rear supporting end through threads.
The device has solved unable eccentric, the inaccurate problem of test of adjustment when the oil blanket applied lever principle test moment of torsion: the eccentric adjusting end, the front supporting end and the rear supporting end are mainly used for adjusting the eccentric device, and the front supporting end and the rear supporting end play roles in supporting dead weight of the testing end, preventing error deviation, limiting radial position of the testing end and allowing circumferential movement. Under the action of the invention, the torque testing precision of the oil seal is improved, and technical support is provided for oil seal design and test.
The front support end and the rear support end are fastened and connected with the fixed support through bolts, so that the function of supporting the test end is achieved, and the problem that the oil seal is stressed unevenly under the non-eccentric state due to too large weight after lubricating oil is filled in the sealing cavity is solved; the front support end and the rear support end are respectively provided with the deep groove ball bearings, the bearings limit the radial position of the test end, play a supporting role, enable the test end to freely rotate in the circumferential direction, and enable the test end seal cavity shell to deflect in the circumferential direction during testing so as to enable the swing rod to squeeze the tension-compression sensor.
Drawings
FIG. 1 is a front view of an eccentric adjustment device of the present invention;
FIG. 2 is a cross-sectional view of an eccentric adjustment end of the present invention;
fig. 3 is a cross-sectional view of the front and rear support ends of the present invention.
In the figure: 1-sleeve, 2-visual window, 3-swing rod, 4-pulling and pressing sensor, 5-nut, 6-pin, 7-screw, 8-flange, 9-, 10-screw seat, 11-fixed support, 12-front bearing seat, 13-large diameter deep groove ball bearing, 14-front labyrinth seal static ring, 15-front labyrinth seal moving ring, 16-front bearing end cover, 17-rear labyrinth seal static ring, 18-rear labyrinth seal moving ring, 19-small diameter deep groove ball bearing, 20-rear bearing end cover and 21-rear bearing seat.
Detailed Description
To make the objects, contents and advantages of the present invention more apparent, the following detailed description of the present invention will be given with reference to the accompanying drawings and examples.
The invention provides an eccentric adjusting device in an oil seal torque test, which comprises a fixed bracket, an eccentric adjusting end, a front supporting end, a rear supporting end and a testing end, wherein the fixed bracket is connected with the ground, and the eccentric adjusting end is connected with the fixed bracket through a dovetail groove. The front support end and the rear support end are respectively and fixedly connected with the fixed bracket through threads, and the test end is positioned between the front support end and the rear support end and is fixedly connected with the front support end and the rear support end through threads.
The eccentric adjusting end can vertically move up and down along the dovetail groove.
The test end comprises a seal cavity shell, a visual window, a swing rod and a tension-compression sensor, wherein the visual window is fastened on the seal cavity shell through threaded connection, two ends of the seal cavity shell are fastened and connected with labyrinth seal groups static rings on two sides through bolts, and an air inlet and an oil inlet are formed in the seal cavity shell. The swing rod is vertically arranged at the lower side of the sealed cavity shell, one end of the swing rod is welded on the sealed cavity shell, the other end of the swing rod is free, and a tension and compression sensor is arranged at the right side of the free end of the swing rod. The visual window is made of visual glass, the tension and compression sensor is fastened on the fixed support through bolts, and the contact level of the tension and compression sensor is the same as the level of the free end of the swing rod.
The eccentric adjusting end comprises a nut, a pin shaft, a screw, a flange, a sleeve and a screw seat, wherein the screw vertically penetrates through the sleeve to be connected with the nut and the screw seat: the middle part of the screw rod is fixedly connected with the sleeve through a pin shaft, the upper end of the screw rod is inserted into the screw cap and concentric with the screw rod, the pin shaft penetrates through the screw cap and the screw rod, the lower end of the screw rod is in threaded fit with the screw rod seat, and the screw rod seat is fastened on the fixed support through a bolt. When the nut rotates clockwise, the screw rod moves upwards through threaded fit with the fixed screw rod seat and drives the sleeve to vertically move upwards; when the nut rotates anticlockwise, the screw rod moves downwards through threaded fit with the fixed screw rod seat and drives the sleeve to vertically move downwards.
The front support end comprises a front bearing seat, a large-diameter deep groove ball bearing, a front bearing end cover and a front labyrinth seal group, wherein the front bearing seat is fastened on a fixed support through bolts, and the large-diameter deep groove ball bearing is arranged in a groove of the front bearing seat and is contacted with the groove through a bearing outer ring. The right side of the large-diameter deep groove ball bearing is provided with a front bearing end cover, and the bearing end cover is fastened at a position vertically above the front bearing seat groove through bolts. The inner ring of the large-diameter deep groove ball bearing is in contact fit with the static ring of the front labyrinth seal group, the moving ring of the front labyrinth seal group is installed on the shaft in an interference fit manner, and the moving ring and the static ring of the front labyrinth seal group are installed in a clearance fit manner.
The rear support end comprises a rear bearing seat, a small-diameter deep groove ball bearing, a rear bearing end cover and a rear labyrinth seal group, wherein the rear bearing seat is fastened on a fixed support through bolts, a groove is formed in the left end of the rear bearing seat, and the small-diameter deep groove ball bearing is installed in the groove and contacts with the groove through a bearing inner ring. The back labyrinth seal group static ring is provided with a groove, the inner ring of the groove is in contact fit with the outer ring of the small-diameter deep groove ball bearing, the right side of the bearing is provided with a back bearing end cover, and the end cover is fastened at a position vertically above the back labyrinth seal group static ring groove through a bolt. The rotating shaft is provided with a rear labyrinth seal group moving coil in an interference fit manner, and the rear labyrinth seal group moving coil and the static coil are installed in a clearance fit manner. The inner diameter of the rear bearing seat is 10mm larger than the outer diameter of the movable ring of the rear labyrinth seal group.
The front support end and the rear support end enable the radial position of the test end to be fixed, the test end can rotate freely in the circumferential direction, the test end cannot deviate along with the shaft to generate deviation when the eccentricity is regulated, and meanwhile, the test end can deviate in the circumferential direction to drive the swing rod to squeeze the tension-compression sensor when the torque is tested.
The inner diameter of the rear bearing seat is 10mm larger than the outer diameter of the rear labyrinth seal group moving coil so as to prevent the rear labyrinth seal group moving coil from being contacted and extruded with the rear bearing end cover when moving along with the shaft and keep the eccentric adjustment amount when the eccentric adjustment is satisfied.
When the eccentricity is regulated, the nut in the eccentric regulating end rotates, the screw rod moves up and down through the threaded fit between the screw rod seat and the fixed screw rod seat, and drives the sleeve to vertically move up and down, and the sleeve drives the bearing and the rotating shaft to move together. The testing end is limited by the front supporting end and the rear supporting end in the radial direction and does not move along with the radial movement of the rotating shaft, and finally the tested oil seal generates eccentric quantity.
As shown in FIG. 1, the device for adjusting the eccentric device in the oil seal torque test comprises a fixed bracket, an eccentric adjusting end, a front supporting end, a rear supporting end and a testing end, wherein the fixed bracket is connected with the ground, and the eccentric adjusting end is connected with the fixed bracket through a dovetail groove. The front support end and the rear support end are respectively and fixedly connected with the fixed bracket through threads, and the test end is positioned between the front support end and the rear support end and is fixedly connected with the front support end and the rear support end through threads. The eccentric adjusting end can vertically move up and down along the dovetail groove.
As shown in fig. 2 and 3:
the testing end comprises a sealing cavity shell (1), a visual window (2), a swinging rod (3) and a tension-compression sensor (4), wherein the visual window (2) is fastened on the sealing cavity shell (1) through threaded connection, two ends of the sealing cavity shell (1) are fastened and connected with two labyrinth seal groups through bolts, and an air inlet and an oil inlet are formed in the sealing cavity shell (1). The swing rod (3) is vertically arranged at the lower side of the sealed cavity shell (1), one end of the swing rod is welded on the sealed cavity shell (1) while the other end is free, and a tension and compression sensor (4) is arranged at the right side of the free end of the swing rod (3). The visual window (2) is made of visual glass, the tension and compression sensor (4) is fastened on the fixed support (11) through bolts, and the contact level of the tension and compression sensor (4) is the same as the level of the free end of the swing rod (3).
The eccentric adjusting end comprises a screw cap (5), a pin shaft (6), a screw rod (7), a flange (8), a sleeve (9) and a screw rod seat (10), wherein the screw rod (7) vertically penetrates through the sleeve (9) to be connected with the screw cap (5) and the screw rod seat (10): the middle part of the screw rod (7) is fixedly connected with the sleeve (9) through the pin shaft (6), the upper end of the screw rod (7) is inserted into the screw cap (5) and concentric with the screw cap, the pin shaft (6) penetrates through the screw cap (5) and the screw rod (7), the lower end of the screw rod (7) is in threaded fit with the screw rod seat (10), and the screw rod seat (10) is fastened on the fixed support (11) through bolts. When the nut (5) rotates clockwise, the screw (7) moves upwards through threaded fit with the fixed screw seat (10) and drives the sleeve (9) to vertically move upwards; when the screw cap (5) rotates anticlockwise, the screw (7) moves downwards through threaded fit with the fixed screw seat (10) and drives the sleeve (9) to vertically move downwards.
The front support end comprises a front bearing seat (12), a large-diameter deep groove ball bearing (13), a front bearing end cover (16) and a front labyrinth seal group, wherein the front bearing seat (12) is fastened on a fixed support (11) through bolts, and the large-diameter deep groove ball bearing (13) is arranged in a groove of the front bearing seat (12) and is contacted with the groove through a bearing outer ring. The right side of the large-diameter deep groove ball bearing (13) is provided with a front bearing end cover (16), and the bearing end cover is fastened at a position vertically above a groove of the front bearing seat (12) through bolts. The inner ring of the large-diameter deep groove ball bearing (13) is in contact fit with the static ring (14) of the front labyrinth seal group, the front labyrinth seal group moving ring (15) is installed on the shaft in an interference fit manner, and the front labyrinth seal group moving ring and the static ring are installed in a clearance fit manner.
The rear support end comprises a rear bearing seat (21), a small-diameter deep groove ball bearing (19), a rear bearing end cover (20) and a rear labyrinth seal group, wherein the rear bearing seat (21) is fastened on a fixed support (11) through bolts, a groove is formed in the left end part of the rear bearing seat (20), and the small-diameter deep groove ball bearing (19) is installed in the groove and contacts with the groove through a bearing inner ring. The back labyrinth seal group static ring (17) is provided with a groove, the inner ring of the groove is in contact fit with the outer ring of the small-diameter deep groove ball bearing (19), the right side of the bearing is provided with a back bearing end cover (20), and the end cover is fastened at the position vertically above the groove of the back labyrinth seal group static ring (17) through bolts. And a rear labyrinth seal group moving coil (18) is arranged on the rotating shaft in an interference manner, and the rear labyrinth seal group moving coil and the static coil are in clearance fit. The inner diameter of the rear bearing seat (21) is 10mm larger than the outer diameter of the rear labyrinth seal group moving coil (18).
In summary, the front support end and the rear support end are fastened and connected with the fixed support through bolts, so that the function of supporting the test end is achieved, and the problem that the oil seal is stressed unevenly under the non-eccentric state due to too large weight after lubricating oil is filled in the sealing cavity is solved; the front support end and the rear support end are respectively provided with the deep groove ball bearings, so that the radial position of the test end is limited by the bearings, the support function is realized, and the test end can freely rotate along the circumferential direction.
When the oil seal torque is tested under the eccentric working condition, firstly, the eccentric amount is adjusted: the nut in the eccentric adjusting end rotates, the screw rod moves up and down through threaded cooperation with the fixed screw rod seat and drives the sleeve to vertically move up and down, and the sleeve drives the bearing and the rotating shaft to move together. The testing end is radially limited by the front supporting end and the rear supporting end and does not radially move along with the radial movement of the rotating shaft, so that the tested oil seal generates eccentric quantity; starting the test: the shell of the sealing cavity of the test end is deflected circumferentially due to friction torque, so that the swing rod is extruded to pull and press the sensor, and the friction torque of the obtained oil seal is tested by utilizing a lever principle technology.
The invention relates to the field of rotary sealing ring tests, in particular to an eccentric adjusting device in oil seal torque test. The device comprises a fixed bracket, an eccentric adjusting end, a front supporting end, a rear supporting end and a testing end. The fixed support is fixedly connected with the ground, the eccentric adjusting end is connected with the fixed support through a dovetail groove, vertical movement can be achieved, the front supporting end and the rear supporting end are respectively and fixedly connected with the fixed support through threads, and the testing end is located between the front supporting end and the rear supporting end and fixedly connected with the front supporting end and the rear supporting end through threads.
The device has solved unable eccentric, the inaccurate problem of test of adjustment when the oil blanket applied lever principle test moment of torsion: the eccentric adjusting end, the front supporting end and the rear supporting end are mainly used for adjusting the eccentric device, and the front supporting end and the rear supporting end play roles in supporting dead weight of the testing end, preventing error deviation, limiting radial position of the testing end and allowing circumferential movement. Under the action of the invention, the torque testing precision of the oil seal is improved, and technical support is provided for oil seal design and test.
The front support end and the rear support end are fastened and connected with the fixed support through bolts, so that the function of supporting the test end is achieved, and the problem that the oil seal is stressed unevenly under the non-eccentric state due to too large weight after lubricating oil is filled in the sealing cavity is solved; the front support end and the rear support end are respectively provided with the deep groove ball bearings, the bearings limit the radial position of the test end, play a supporting role, enable the test end to freely rotate in the circumferential direction, and enable the test end seal cavity shell to deflect in the circumferential direction during testing so as to enable the swing rod to squeeze the tension-compression sensor.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that modifications and variations could be made by those skilled in the art without departing from the technical principles of the present invention, and such modifications and variations should also be regarded as being within the scope of the invention.
Claims (6)
1. The eccentric adjusting device in the oil seal torque test is characterized by comprising a fixed bracket, an eccentric adjusting end, a front supporting end, a rear supporting end and a testing end, wherein the fixed bracket is connected with the ground, the eccentric adjusting end is connected with the fixed bracket through a dovetail groove, the front supporting end and the rear supporting end are respectively and fixedly connected with the fixed bracket through threads, and the testing end is positioned between the front supporting end and the rear supporting end and is fixedly connected with the front supporting end and the rear supporting end through threads;
wherein, the liquid crystal display device comprises a liquid crystal display device,
the testing end comprises a sealing cavity shell (1), a visual window (2), a swinging rod (3) and a tension-compression sensor (4), wherein the visual window (2) is fastened on the sealing cavity shell (1) through threaded connection, two ends of the sealing cavity shell (1) are fastened and connected with static rings of labyrinth seal groups on two sides through bolts, and an air inlet and an oil inlet are formed in the sealing cavity shell (1); the swing rod (3) is vertically positioned at the lower side of the sealed cavity shell (1), one end of the swing rod is welded on the sealed cavity shell (1) while the other end is free, and a tension and compression sensor (4) is arranged at the right side of the free end of the swing rod (3); the visual window (2) is made of visual glass, and the tension and compression sensor (4) is fastened on the fixed bracket (11) through bolts;
the eccentric adjusting end comprises a screw cap (5), a pin shaft (6), a screw rod (7), a flange (8), a sleeve (9) and a screw rod seat (10), wherein the screw rod (7) vertically penetrates through the sleeve (9) to be connected with the screw cap (5) and the screw rod seat (10): the middle part of the screw rod (7) is fixedly connected with the sleeve (9) through the pin shaft (6), the upper end of the screw rod (7) is inserted into the screw cap (5) and concentric with the screw cap, the pin shaft (6) penetrates through the screw cap (5) and the screw rod (7), the lower end of the screw rod (7) is in threaded fit with the screw rod seat (10), and the screw rod seat (10) is fastened on the fixed bracket (11) through a bolt;
when the nut (5) rotates clockwise, the screw (7) moves upwards through threaded fit with the fixed screw seat (10) and drives the sleeve (9) to vertically move upwards; when the screw cap (5) rotates anticlockwise, the screw (7) moves downwards through threaded fit with the fixed screw seat (10) and drives the sleeve (9) to vertically move downwards;
during eccentric adjustment, a nut (5) in the eccentric adjustment end rotates, a screw (7) moves up and down through threaded cooperation with a fixed screw seat (10) and drives a sleeve (9) to vertically move up and down, and the sleeve (9) drives a bearing and a rotating shaft to move together; the testing end is limited by the front supporting end and the rear supporting end in the radial direction and does not move along with the radial movement of the rotating shaft, and finally the tested oil seal generates eccentric quantity.
2. The eccentric adjusting device in oil seal torque test according to claim 1, wherein the contact level of the tension and compression sensor (4) is the same as the free end level of the swing rod (3).
3. The eccentric adjusting device in oil seal torque test according to claim 1, wherein the front support end comprises a front bearing seat (12), a large-diameter deep groove ball bearing (13), a front bearing end cover (16) and a front labyrinth seal group, wherein the front bearing seat (12) is fastened on a fixed bracket (11) through bolts, and the large-diameter deep groove ball bearing (13) is installed in a groove of the front bearing seat (12) and is contacted with the groove through a bearing outer ring; the right side of the large-diameter deep groove ball bearing (13) is provided with a front bearing end cover (16), and the bearing end cover is fastened at a position vertically above a groove of the front bearing seat (12) through bolts; the inner ring of the large-diameter deep groove ball bearing (13) is in contact fit with the static ring (14) of the front labyrinth seal group, the front labyrinth seal group moving ring (15) is installed on the shaft in an interference fit mode, and the front labyrinth seal group moving ring (15) and the static ring (14) are installed in a clearance fit mode.
4. An oil seal torque testing eccentric adjusting device according to claim 3, wherein the rear supporting end comprises a rear bearing seat (21), a small-diameter deep groove ball bearing (19), a rear bearing end cover (20) and a rear labyrinth seal group, wherein the rear bearing seat (21) is fastened on a fixed bracket (11) through bolts, a groove is arranged at the left end part of the rear bearing seat (21), and the small-diameter deep groove ball bearing (19) is arranged in the groove and contacted with the groove through a bearing inner ring; the rear labyrinth seal group static ring (17) is provided with a groove, the inner ring of the groove is in contact fit with the outer ring of the small-diameter deep groove ball bearing (19), the right side of the bearing is provided with a rear bearing end cover (20), and the end cover is fastened at a position vertically above the groove of the rear labyrinth seal group static ring (17) through bolts; the rotating shaft is provided with a rear labyrinth seal group moving coil (18) in an interference mode, and the rear labyrinth seal group moving coil (18) and a rear labyrinth seal group static coil (17) are installed in a clearance fit mode.
5. An eccentric adjusting device in oil seal torque test as claimed in claim 4, wherein the inner diameter of the rear bearing seat (21) is 10mm larger than the outer diameter of the rear labyrinth seal moving coil (18).
6. The device for eccentric adjustment in oil seal torque testing as claimed in claim 1, wherein said eccentric adjustment end moves vertically up and down along a dovetail groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210266415.8A CN114674539B (en) | 2022-03-17 | 2022-03-17 | Eccentric adjusting device in oil seal torque test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210266415.8A CN114674539B (en) | 2022-03-17 | 2022-03-17 | Eccentric adjusting device in oil seal torque test |
Publications (2)
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