CN109945812A - A kind of shaft replaces the sealing area contact width monitoring method of mechanism and rubber and plastic axle envelope - Google Patents

A kind of shaft replaces the sealing area contact width monitoring method of mechanism and rubber and plastic axle envelope Download PDF

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Publication number
CN109945812A
CN109945812A CN201910221409.9A CN201910221409A CN109945812A CN 109945812 A CN109945812 A CN 109945812A CN 201910221409 A CN201910221409 A CN 201910221409A CN 109945812 A CN109945812 A CN 109945812A
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CN
China
Prior art keywords
shaft
guide shaft
rubber
transparent guide
axle envelope
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CN201910221409.9A
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Chinese (zh)
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CN109945812B (en
Inventor
张超
刘迪
王少萍
陈启航
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北京航空航天大学
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Priority to CN201910221409.9A priority Critical patent/CN109945812B/en
Publication of CN109945812A publication Critical patent/CN109945812A/en
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Publication of CN109945812B publication Critical patent/CN109945812B/en

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Abstract

The present invention proposes that a kind of shaft replaces the sealing area contact width monitoring method of mechanism and rubber and plastic axle envelope, belongs to rubber and plastic rotatory sealing field.It includes: transparent guide shaft, connecting shaft, gripping block, fastening screw and endoscope that shaft, which replaces mechanism,;A kind of sealing area contact width monitoring method of rubber and plastic axle envelope, the specific steps are as follows: when detection, stop testing stand and motor operating, unclamp fastening screw, dismantle the ligand of metal guide shaft and connecting shaft;Metal guide shaft is changed to transparent guide shaft, transparent guide shaft and connecting shaft ligand are installed to machine shaft;Measure and adjust the degree of eccentricity of shaft;Endoscope is mounted on inside the hollow pipeline of transparent guide shaft;Starting testing stand and motor carry out data acquisition and calculate contact width.The present invention replaces mechanism using transparent guide shaft, can adjust the degree of eccentricity of shaft in real time, meanwhile, the measurement of contact width is monitored on-line using contactless type, is more really fitted the actual working conditions of rubber and plastic axle envelope.

Description

A kind of shaft replaces the sealing area contact width monitoring method of mechanism and rubber and plastic axle envelope

Technical field

The present invention relates to rubber and plastic rotatory sealing fields, and in particular to a kind of mechanism of shaft replacement is needing to monitor sealing When the contact width of region, working metal axis is changed to transparent axis, recycles the variation of endoscopic contact width.

Background technique

Rubber and plastic axle envelope is widely used in the portions such as gearbox, the drive axle of engineering machinery as a kind of common sealing element In part.Mainly it is made of metallic framework, fastening spring and seal lip three parts.Its sealing mechanism is using lip in air side It is different with the angle of oily side, and generate pump under the action of interference power and draw effect, prevent the leakage of oil liquid.Due to rubber and plastic axle envelope with The lip of interference fit between shaft, axle envelope will necessarily generate deformation, so that the sealing area between lip and shaft exists A certain amount of contact width, usually between 0.15~0.5mm.The exactly presence of contact width, so that oil liquid is in sealing area One layer of stable lubricating oil film is formd, film thickness usually reduces under the premise of guaranteeing that axle envelope does not leak in 0.5~1.5um Friction between lip and shaft.If contact width is excessive, the area of lubricating oil film is bigger, and thickness becomes smaller, the sealing of axle envelope Performance can improve, but the abrasion of lip can become more acutely;If contact width is too small, the area of lubricating oil film is smaller, Thickness is got higher, and the lubrication property of axle envelope is more preferable, but sealing performance is opposite to become worse.With the senile abrasion of sealing element, The contact width of lip can be gradually reduced, and therefore, in the test for carrying out performance degradation to rubber and plastic axle envelope, be connect to sealing area Touching width be monitored very it is necessary to.

Contact width measurement for rubber and plastic axle envelope sealing area, does not have more mature test monitoring scheme yet at present, needs The complicated factor to be considered has as follows: (1) order of magnitude very little of contact width;(2) size of rubber and plastic axle envelope itself is little, causes The space for trying detection zone is also little;(3) experimental enviroment of rubber and plastic axle envelope cannot be destroyed in monitoring process.

Summary of the invention

In the performance study of rubber and plastic axle envelope, the contact width of sealing area will directly affect the area and thickness of lubricating oil film Degree then further influences the sealing characteristics and service life of axle envelope.Existing complicated factor when in view of monitoring, at present not yet There is more mature test monitoring scheme.The present invention proposes a kind of shaft replacement mechanism and corresponding to measure contact width Monitoring method.

A kind of shaft provided by the invention replaces mechanism, and the sealing area contact width for rubber and plastic axle envelope monitors, be by Metal shaft replaces with transparent axis, and specifically, the mechanism includes transparent guide shaft, connecting shaft, gripping block, fastening screw and interior peeps Mirror.

The transparent guide shaft, one end are threadedly coupled mode and are fixedly connected with connecting shaft, and one section of other end setting is hollow Pipeline, the length of hollow pipeline are covered to the contact area of rubber and plastic axle envelope and transparent guide shaft on the outside of pipeline;Installation in hollow pipeline The probe of fixed endoscope, pop one's head in face described in contact area.

The connecting shaft, left end are connected through a screw thread transparent guide shaft, and right end is by being fixedly connected with electricity with gripping block cooperation Machine shaft or torque sensor shaft;The middle part design of connecting shaft has the rotary table of a protrusion, is provided with threaded hole for matching on rotary table Close fastening screw;The right end of connecting shaft is designed as the port of inside cylindrical shape, outer, conical;Connecting shaft passes through outside conical end Face and gripping block are interference fitted, and are connect by inside cylindrical end face with machine shaft or torque sensor shaft interference.

The gripping block, is provided with centre bore, for being passed through machine shaft or torque sensor shaft, the rotary table of gripping block On be uniformly provided with threaded hole, it is corresponding with the threaded hole being provided on connecting shaft rotary table, for cooperating fastening screw.

The fastening screw adjusts the bias of transparent guide shaft by fastening screw for fixing to clamp block and connecting shaft Degree.

A kind of sealing area contact width monitoring method of the rubber and plastic axle envelope based on the shaft replacement mechanism, including such as Lower step:

Step 1: it in the test of rubber and plastic axle envelope performance degradation, is tested using metal guide shaft;Utilize the connecting shaft And gripping block, allow metal guide shaft and machine shaft or torque sensor shaft to match;It is needing to be monitored contact width When, stop testing stand and motor operating;

Step 2: fastening screw is unclamped, the ligand of metal guide shaft and connecting shaft is unloaded;

Step 3: metal guide shaft is changed to transparent guide shaft by the threaded connection ligand of disassembly metal guide shaft and connecting shaft, Transparent guide shaft is connect with connecting shaft by being threadedly engaged;

Step 4: the ligand of transparent guide shaft and connecting shaft is installed on machine shaft or torque sensor shaft;

Step 5: measuring the degree of eccentricity of shaft using concentricity measuring instrument, is adjusted by the fastening screw of four direction The degree of eccentricity;

Step 6: the probe of endoscope is mounted on inside the hollow pipeline of transparent guide shaft, makes faced pipe of popping one's head in It is the contact area of rubber and plastic axle envelope and shaft on the outside of road;

Step 7: starting testing stand and motor;

Step 8: data acquisition is carried out;Sample frequency is set, the figure of multiple groups contact area is obtained within the period of setting Image is uploaded in industrial personal computer by picture, and industrial personal computer converses true contact width according to the magnification ratio of endoscope.

Advantages of the present invention replaces mechanism by simple transparent guide shaft with the present invention is had the active effect that, realizes rubber Mould the contact width measurement of axle envelope sealing area.In measurement process, for the small problem of contact width, endoscope figure is used As the method for amplification solves;For the small problem of detection zone, uses transparent guide shaft and design, docked using probe from inside Touching width measures;Aiming at the problem that destroying operating condition, mechanism is replaced using novel guide shaft, the inclined of shaft can be adjusted in real time Heart degree, meanwhile, the measurement of entire contact width is more really fitted rubber and plastic axle envelope using the method for contactless type on-line monitoring Actual working conditions.

Detailed description of the invention

Fig. 1 is shaft replacement mechanism side view of the invention;

Fig. 2 is transparent guide shaft and endoscope probe schematic view of the mounting position of the invention;

Fig. 3 is rubber and plastic axle envelope of the invention and transparent guide shaft contact area position view;

Fig. 4 is the side view of connecting shaft in replacement mechanism of the invention;

Fig. 5 is gripping block side view of the invention;

Fig. 6 is the cross-sectional view of transparent guide shaft replacement mechanism of the invention;

Fig. 7 is the sealing area contact width monitoring method flow chart of rubber and plastic axle envelope of the invention.

In figure:

The transparent guide shaft of 1-, 2- connecting shaft, 3- gripping block, 4- fastening screw, 5- endoscope, 6- pipe screw thread, in the transparent axis of 7- Vacant duct, 8- contact area, 9- rubber and plastic axle envelope, 10- external screw thread, the fastening screw threaded hole of 11- connecting shaft, circular cone on the outside of 12- End face, 13- inside cylindrical end face, 14- stria mouth, 15- gripping block fastening screw threaded hole.

Specific embodiment

Below in conjunction with drawings and examples to the online of the sealing area contact width for rubber and plastic axle envelope of the invention Monitoring method is described in further detail.

The present invention provides a kind of shaft replacement mechanisms to be replaced with metal guide shaft using the method for not contact measurement Bright guide shaft is installed the probe of endoscope in transparent guide shaft, is monitored on-line to the contact width of sealing area, chooses certain Sample frequency obtain multiple groups contact width value.

Illustrate that the specific implementation of the sealing area contact width monitoring method of rubber and plastic axle envelope of the invention needs to rely on first Transparent axis replace mechanism.Since rubber and plastic axle envelope is high to the degree of eccentricity requirement of transparent guide shaft during the test, do not adopt here Replace guide shaft with the method for shaft coupling, the present invention devise it is a kind of can the on-line control shaft degree of eccentricity transparent axis replacement mechanism, As shown in Figure 1, provided shaft replacement mechanism includes: transparent guide shaft 1, connecting shaft 2, gripping block 3, fastening screw 4 and interior peeps Mirror 5.

Transparent guide shaft 1 is manufactured using colourless transparent resin glass, and light transmittance reaches 92%.Transparent guide shaft 1 is according to be replaced Metal guide shaft size design.It is connected through a screw thread between transparent guide shaft 1 and connecting shaft 2, as shown in Fig. 2, transparent guide shaft 1 is whole Body is solid design, wherein one end that transparent guide shaft 1 is connect with connecting shaft 2 be pipe screw thread 6 design, transparent guide shaft 1 it is another One section of hollow pipeline 7 of end setting.Endoscope probe is installed and fixed in hollow pipeline 7, and the probe wire of endoscope 5 is from transparent guide shaft The bottom of 1 one end is stretched out, and probe orientation faces the contact area 8 of transparent guide shaft 1 and sealing ring.As shown in figure 3, hollow pipeline 7 length needs to cover to the contact area 8 of rubber and plastic axle envelope 9 on the outside of pipeline and transparent guide shaft 1.The external dimensions of transparent guide shaft 1 Design considerations is the size of testpieces rubber and plastic axle envelope 9, and surface roughness processing stage is depending on the demand of rubber and plastic axle envelope 9.

As shown in figure 4, connecting shaft 2 turns for connecting transparent guide shaft 1 and motor for connecting shaft in replacement mechanism of the invention Axis or torque sensor shaft.One end of connecting shaft 2 is the design of external screw thread 10, to cooperate with the pipe screw thread 6 of transparent guide shaft 1;Even The other end and gripping block 3 cooperation of spindle 2 are connect with machine shaft or torque sensor shaft.The middle part of connecting shaft 2 is designed as The rotary table of one protrusion, is provided with fastening screw threaded hole 11 on rotary table, for cooperating fastening screw 4.In view of rubber and plastic axle envelope 9 is tested The middle eccentric adjusting problem for needing to consider transparent guide shaft 1, one end that connecting shaft 2 is connect with machine shaft or torque sensor shaft Using inside cylindrical shape, the port of outer, conical, as shown in figure 4, the outside circle of one end that connecting shaft 2 is connect with machine shaft Tapered end face 12 and gripping block 3 are interference fitted, and inside cylindrical end face 13 is connect with machine shaft (or torque sensor shaft) interference.

Connection between connecting shaft 2 and machine shaft (or torque sensor shaft) is connected using 13 interference of inside cylindrical end face It connects, connecting shaft 2 is external member at this time, and machine shaft (or torque sensor shaft) is internal member.Turn in connecting shaft 2 and motor The symmetrical stria mouth 14 of twice is also opened at the port of one end of axis (or torque sensor shaft) connection, the width of stria mouth 14 exists 0.5~2mm, depth are 3/4ths ratios of port depth, and port depth herein refers to the one end connecting with machine shaft Inside cylindrical shape, the port length of outer, conical.Interference size is adjusted using the clamping process of gripping block 3, makes to connect Axis 2 is securely fixed with machine shaft (or torque sensor shaft).

As shown in figure 5, gripping block 3 is for stepping up connecting shaft 2 and machine shaft (or torque sensor shaft), gripping block 3 Centre bore be passed through machine shaft (or torque sensor shaft), be uniformly provided with fastening screw threaded hole on the rotary table of gripping block 3 15.The rotary table of gripping block 3 is identical as the face size of the rotary table of connecting shaft 2, the fastening screw threaded hole 15 and connecting shaft opened Fastening screw threaded hole 11 it is corresponding.Connection between connecting shaft 2 and gripping block 3 is connected using circular cone interference, is clamped at this time Block 3 is external member, and connecting shaft 2 is internal member.Four fastening screws 4 are installed in the connection direction of connecting shaft 2 and gripping block 3, 4 one side of fastening screw is used to fix to clamp block 3 and connecting shaft 2, on the other hand can finely tune the degree of eccentricity of transparent guide shaft 1.

As shown in fig. 6, for shaft provided by the invention replace mechanism integrated connection cross-sectional view, transparent 1 one end of guide shaft with 2 one end of connecting shaft is threadedly coupled mode and fixes, and the other end and machine shaft (or torque sensor shaft) of connecting shaft 2 are even It connects, and is fastened by gripping block 3.

The probe of endoscope is fixed in the hollow pipeline 7 of transparent guide shaft 1 using glue, while the image that measurement is obtained Information passes in industrial personal computer, i.e. industrial control computer.Industrial personal computer converts to obtain true in image procossing using dimension scale Sealing area contact width.The present invention is to choose certain sample frequency, obtains multiple groups contact width number whithin a period of time According to and take average processing.

In the test of rubber and plastic axle envelope performance degradation, it is contemplated that actual condition is tested using metal guide shaft, utilizes Fig. 4 Connecting shaft 2 and Fig. 5 gripping block 3, allow metal guide shaft and machine shaft (or torque sensor shaft) to match.In needs pair When contact width is monitored, first stop the operating of testing stand and motor, then carry out the replacement of metal guide shaft, is peeped in progress later The location and installation of mirror probe, finally opens testing stand and motor, carries out the measurement of contact width, a kind of rubber and plastic provided by the invention The sealing area contact width monitoring method of axle envelope, as shown in Figure 7, the specific steps are as follows:

Step 1: stop testing stand and motor operating.Need to stop the fortune of testing stand and motor during replacing shaft Turn, guarantees the safety of operation.

Step 2: dismantling connection axis 2.By unclamping four fastening screws 4 in Fig. 1, by metal guide shaft and its connecting shaft It unloads.Four fastening screws 4 gradually unclamp, and the asymmetric stress generated after avoiding single screw from backing out generates entire mechanism broken It is bad.

It needs exist for specially illustrating a bit, disassembly process does not use the threaded connection in metal guide shaft and connecting shaft 2 herein The method for locating directly to back out metal guide shaft, the reasons are as follows: (1) fastness is considered in the threaded connection at metal guide shaft, The torque generated during twisting is very big, considerably beyond the range of torque sensor, directly backs out breakdown torque sensor Precision.(2) metal guide shaft and the size setting of transparent guide shaft 1 are essentially identical, but there will still likely be eccentricity issues after reinstalling, Adjusting must be re-started to the degree of eccentricity of shaft, this link must also unclamp four fastening screws 4.(3) due to metal guide shaft Size it is smaller, be threadedly coupled fastening, needed in testing stand using the external tools such as pliers in both vertical connection direction It is operated in plane, operating space is extremely inconvenient.

Step 3: replacement guide shaft.The threaded connection ligand of the metal guide shaft and connecting shaft 2 that remove in step 2 leads to It crosses the external tools such as pliers to be isolated, and metal guide shaft is changed to transparent guide shaft 1, again by transparent guide shaft 1 and connecting shaft 2 It is cooperatively connected.

Step 4: transparent guide shaft 1 and the ligand of connecting shaft 2 are installed to machine shaft or torque sensor shaft.It is first First, the gripping block 3 of Fig. 5 is cooperated by fastening screw 4 in the port of connecting shaft 2, fastening screw 4 is at relaxed state herein, only Pass through the outside circular cone end face cooperation of connecting shaft 2 in Fig. 4.Form shaft replacement mechanism ligand as shown in Figure 1.Then, will Ligand shown in Fig. 1 is matched by the inside cylindrical end face of connecting shaft 2 with machine shaft (or torque sensor shaft).Most Fastening screw 4 is successively tightened afterwards.

Step 5: the degree of eccentricity is adjusted.The degree of eccentricity that shaft is measured using concentricity measuring instrument, passes through the tight of four direction Gu screw 4 is finely tuned, the adjusting of the degree of eccentricity is carried out.

Step 6: placement endoscope.As shown in fig. 6, the probe of endoscope is mounted in transparent guide shaft 1 using glue Inside vacant duct, making the pipeline for popping one's head in faced outside is the contact area 8 of rubber and plastic axle envelope 9 and shaft.

Step 7: starting testing stand and motor.The environment of monitoring is set to be fitted real working condition condition as far as possible.

Step 8: data acquisition.Certain sample frequency is chosen, obtains multiple series of images data whithin a period of time, it will be interior The image that sight glass acquires is uploaded in industrial personal computer, and industrial personal computer converses true contact width according to the magnification ratio of endoscope Degree.

Obviously, described embodiment is also only a part of the embodiments of the present invention, rather than whole embodiments.It is based on Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other Embodiment shall fall within the protection scope of the present invention.

Claims (8)

1. a kind of shaft replaces mechanism, the sealing area contact width for rubber and plastic axle envelope is monitored, which is characterized in that including transparent Guide shaft, connecting shaft, gripping block, fastening screw and endoscope;
The transparent guide shaft, one end are threadedly coupled mode and are fixedly connected with connecting shaft, and one section of hollow pipeline is arranged in the other end, The length of hollow pipeline is covered to the contact area of rubber and plastic axle envelope and transparent guide shaft on the outside of pipeline;In installation is fixed in hollow pipeline The probe of sight glass, pop one's head in face described in contact area;
The connecting shaft, left end are connected through a screw thread transparent guide shaft, and right end is turned by being fixedly connected with motor with gripping block cooperation Axis or torque sensor shaft;The middle part design of connecting shaft has the rotary table of a protrusion, and it is tight for cooperating to be provided with threaded hole on rotary table Gu screw;The right end of connecting shaft is designed as the port of inside cylindrical shape, outer, conical;Connecting shaft by outside circular cone end face with Gripping block interference fit, is connect by inside cylindrical end face with machine shaft or torque sensor shaft interference;
The gripping block, is provided with centre bore, for being passed through machine shaft or torque sensor shaft, on the rotary table of gripping block Cloth is provided with threaded hole, corresponding with the threaded hole being provided on connecting shaft rotary table, for cooperating fastening screw;
The fastening screw adjusts the degree of eccentricity of transparent guide shaft by fastening screw for fixing to clamp block and connecting shaft.
2. shaft according to claim 1 replaces mechanism, which is characterized in that the transparent guide shaft and connect axis connection One end be designed as internal thread structure;The connecting shaft, the one end connecting with transparent guide shaft are designed as external thread structure.
3. shaft according to claim 1 or 2 replaces mechanism, which is characterized in that the right end of the connecting shaft, port go out Place opens the symmetrical stria mouth of twice, adjusts interference size for gripping block.
4. shaft according to claim 3 replaces mechanism, which is characterized in that the stria mouth, width of rebate is 0.5~ 2mm, depth of rebate are 3/4ths of right end port depth.
5. shaft according to claim 1 replaces mechanism, which is characterized in that the transparent guide shaft is reached using light transmittance 92% colourless transparent resin glass is made, and transparent guide shaft is generally solid.
6. shaft replaces mechanism according to claim 1 or 5, which is characterized in that the external dimensions of the transparent guide shaft According to the size design of metal guide shaft to be replaced, surface roughness processing stage is set according to the demand of rubber and plastic axle envelope.
7. shaft according to claim 1 replaces mechanism, which is characterized in that the image that the endoscope obtains measurement Industrial personal computer is passed to, industrial personal computer obtains true sealing area contact width to image procossing.
8. a kind of sealing area contact width monitoring side of the rubber and plastic axle envelope based on shaft described in claim 1 replacement mechanism Method, which comprises the steps of:
Step 1: it in the test of rubber and plastic axle envelope performance degradation, is tested using metal guide shaft;Utilize the connecting shaft and folder Tight block allows metal guide shaft and machine shaft or torque sensor shaft to match;When needing to be monitored contact width, stop Only testing stand and motor operating;
Step 2: fastening screw is unclamped, the ligand of metal guide shaft and connecting shaft is unloaded;
Step 3: metal guide shaft is changed to transparent guide shaft by the threaded connection ligand of disassembly metal guide shaft and connecting shaft, will be saturating Bright guide shaft is connect with connecting shaft by being threadedly engaged;
Step 4: the ligand of transparent guide shaft and connecting shaft is installed on machine shaft or torque sensor shaft;
Step 5: measuring the degree of eccentricity of shaft using concentricity measuring instrument, is adjusted by the fastening screw of four direction eccentric Degree;
Step 6: the probe of endoscope is mounted on inside the hollow pipeline of transparent guide shaft, makes to pop one's head in outside faced pipeline Side is the contact area of rubber and plastic axle envelope and shaft;
Step 7: starting testing stand and motor;
Step 8: data acquisition is carried out;Sample frequency is set, the image of multiple groups contact area is obtained within the period of setting, Image is uploaded in industrial personal computer, industrial personal computer converses true contact width according to the magnification ratio of endoscope.
CN201910221409.9A 2019-03-22 2019-03-22 Rotating shaft replacing mechanism and method for monitoring contact width of sealing area of rubber-plastic shaft seal CN109945812B (en)

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Application Number Priority Date Filing Date Title
CN201910221409.9A CN109945812B (en) 2019-03-22 2019-03-22 Rotating shaft replacing mechanism and method for monitoring contact width of sealing area of rubber-plastic shaft seal

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Application Number Priority Date Filing Date Title
CN201910221409.9A CN109945812B (en) 2019-03-22 2019-03-22 Rotating shaft replacing mechanism and method for monitoring contact width of sealing area of rubber-plastic shaft seal

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CN109945812B CN109945812B (en) 2020-12-08

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