Rotary shaft sealing structure of sensor wiping and cleaning mechanism
Technical Field
The invention relates to the technical field of sensors, in particular to a rotating shaft sealing structure of a sensor wiping and cleaning mechanism.
Background
The sensor is a precise inspection device, and contaminants in the working environment of the sensor device such as a turbidity sensor tend to be easily attached to the probe surface of the sensor during the use of the sensor device, so that the measurement accuracy of the sensor is reduced.
In order to solve the problem of cleaning the probe surface of the sensor, the prior method is to add a wiping and cleaning mechanism to clean the probe surface of the sensor, the wiping and cleaning mechanism is provided with a motor in the sensor, a rotating shaft of the motor extends out of the sensor, and a cleaning brush head is arranged at a position where the rotating shaft extends out of the sensor. The motor body in the wiping and cleaning structure is arranged in the sensor and keeps a static state, and the rotating shaft of the motor penetrates through the end cover of the motor and then extends out of the probe surface of the sensor and is in a swinging state, so that in order to avoid pollutants in a working environment from entering the sensor, an annular sealing sleeve is arranged at a position where the end cover of the motor body is matched with the rotating shaft of the motor, the inner ring of the sealing sleeve is used for being matched with the rotating shaft, the outer ring of the sealing sleeve is matched with the end cover, and the rotating shaft is in a torsion state while the end cover is in the static state.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a rotary shaft sealing structure of a sensor wiping and cleaning mechanism, which can effectively improve the sealing reliability of the matching position of an end cover and a rotary shaft and further prolong the service life of a sensor.
In order to solve the technical problems, the invention adopts the following technical scheme:
The rotary shaft sealing structure of the sensor wiping and cleaning mechanism comprises a sealing sleeve which is integrally hollow and cylindrical, wherein the sealing sleeve is sleeved outside a rotary shaft, one end of the sealing sleeve extends into the space between the rotary shaft and an end cover along with the rotary shaft and is fixedly and hermetically connected with the rotary shaft, the peripheral edge of the end part of the other end of the sealing sleeve extends outwards to form a connecting part which is fixedly and hermetically connected with the end cover, and a gap exists between the part of the outer ring of the sealing sleeve extending into the space between the end cover and the rotary shaft and the end cover.
When the sealing structure is used, one end of the sealing sleeve which is in a hollow cylinder shape integrally extends into a position between the end cover and the rotating shaft, the end part of the sealing sleeve extending into the position between the end cover and the rotating shaft is fixedly and hermetically connected with the rotating shaft, the other end of the sealing sleeve is fixedly and hermetically connected with the sealing sleeve and the end cover through the connecting part, and when the rotating shaft twists to drive the cleaning brush head to clean the surface of the probe of the sensor, the rotating shaft drives the sealing sleeve to twist together, at the moment, because a gap exists between the part of the sealing sleeve extending into the position between the rotating shaft and the end cover, friction is not easy to generate between the outer ring of the sealing sleeve and the end cover in the process of the rotating shaft driving the sealing sleeve to twist, so that the outer ring of the sealing sleeve is not easy to damage due to friction.
The invention has the beneficial effects that in the rotating shaft torsion process, a gap exists between the outer ring of the sealing sleeve and the end cover, so that the friction effect is not easy to generate between the outer ring of the sealing sleeve and the end cover, and the outer ring of the sealing sleeve is not easy to damage due to friction.
Preferably, the outer ring of the sealing sleeve is in a conical structure, the small end of the conical structure of the outer ring of the sealing sleeve extends between the rotating shaft and the end cover along with the rotating shaft, the connecting part is formed by extending the peripheral edge of the large end part of the conical structure of the outer ring of the sealing sleeve outwards, and the peripheral edge of the large end part of the conical structure of the outer ring of the sealing sleeve abuts against the end cover.
Like this, through the outer lane design taper structure with the seal cover to make seal cover taper structure big end tip's edge all around just offset with the end cover, like this, on the one hand when installing seal cover and end cover, utilize seal cover taper structure big end's tip edge all around to spacing between with the end cover, on the other hand, taper structure makes the outer lane size of seal cover that stretches into between pivot and the end cover reduce gradually, thereby make the clearance between the outer lane of seal cover and the end cover that stretches into between pivot and the end cover be greater than 0 all the time, guarantee whole torsion in-process, the difficult friction that produces between seal cover outer lane and the end cover.
Preferably, the outer ring of the sealing sleeve is of a cylindrical structure, one end of the cylindrical structure of the outer ring of the sealing sleeve extends between the rotating shaft and the end cover along with the rotating shaft, the peripheral edge of the end part of the other end of the cylindrical structure of the outer ring of the sealing sleeve extends outwards to form the connecting part, and a gap exists between the part of the outer ring of the sealing sleeve extending between the end cover and the rotating shaft and the end cover.
Like this, through designing the outer lane of seal cover into the cylindricality structure, utilize seal cover outer lane cylindricality structure's one end tip outwards to extend and form connecting portion and be used for being connected with the end cover, there is the clearance between the part that the seal cover outer lane stretches into between end cover and the pivot and the end cover simultaneously, guarantees whole torsion in-process, the difficult friction that produces between seal cover outer lane and the end cover.
Preferably, a flexible sealing film is sleeved on the part of the outer ring of the sealing sleeve extending between the end cover and the rotating shaft.
Therefore, a layer of sealing film is sleeved on the part, extending into the space between the end cover and the rotating shaft, of the outer ring of the sealing sleeve, the sealing film has the characteristics of softness and toughness, sealing effect can be achieved, the sealing film is not easy to break, and when the sealing sleeve is broken and leaked after being twisted for many times in the use process, the sealing sleeve can also support the sealing film sleeved on the outer ring of the sealing sleeve to play a role of preventing water and moisture, so that the sealing reliability of the matching position of the rotating shaft and the end cover is further improved.
Preferably, the sealing sleeve comprises a first sealing sleeve and a second sealing sleeve which are axially distributed along the rotating shaft, the peripheral edge of one end part of the first sealing sleeve extends outwards to form a connecting part which is fixedly and hermetically connected with the end cover, the end part of the second sealing sleeve, which is far away from one end of the first sealing sleeve, is fixedly and hermetically connected with the rotating shaft, a gap exists between the end part of the second sealing sleeve, which is close to one end of the first sealing sleeve, and the corresponding end part of the first sealing sleeve, and a part of the outer ring of the first sealing sleeve, which extends into the space between the end cover and the rotating shaft, and the outer ring of the second sealing sleeve are further sleeved with a flexible sealing film.
In this way, the sealing sleeve is designed into the first sealing sleeve and the second sealing sleeve with a gap between the two sealing sleeves, the first sealing sleeve is connected with the end cover through the connecting part, the second sealing sleeve is connected with the rotating shaft, and the sealing film is sleeved at the part of the outer ring of the first sealing sleeve extending into the space between the end cover and the rotating shaft and the outer ring of the second sealing sleeve.
Preferably, the sealing film is a plastic film.
Therefore, the plastic film is soft and has toughness, is not easy to be broken in the use process, has good sealing performance, and can still play a role in preventing water and moisture when the sealing sleeve breaks and leaks water.
Preferably, the sealing sleeve is used for sealing and sealing the sealing glue at the end parts of the fixed sealing connection positions of the rotating shaft and the end cover.
Therefore, the sealing glue is filled at the end part of the sealing sleeve, which is fixedly and hermetically connected with the rotating shaft and the end cover, and the sealing glue is used for sealing the connecting position of the sealing sleeve, the end cover and the rotating shaft, so that external moisture is prevented from entering the sensor from the connecting position, and the working reliability and the service life of the sensor are further improved.
Preferably, a positioning protrusion is arranged at a part of the rotating shaft extending into the end cover, a positioning groove is formed in a position, corresponding to the positioning protrusion, of the inner ring of the sealing sleeve, and sealing glue is filled and sealed at a position, matched with the positioning protrusion, of the positioning groove.
Like this, through design location arch in the pivot, set up the constant head tank in the position that seal cover inner circle corresponds with the location arch, spacing when utilizing location arch and constant head tank to realize being connected between pivot and the seal cover, simultaneously at the bellied cooperation position embedment sealant of location recess and location, prevent outside moisture from entering into inside the sensor by the cooperation department.
Preferably, the sealing sleeve is a torsion sealing sleeve with strength and toughness.
Therefore, the torsion sealing sleeve can well twist along with the rotating shaft, and has certain strength and toughness, so that the torsion sealing sleeve is not easy to damage in the use process, and the good sealing performance of the torsion sealing sleeve is ensured.
Preferably, the torsion seal sleeve is made of rubber materials.
Therefore, the rubber material is soft and has certain elasticity, and the torsion sealing sleeve made of the rubber material can ensure the sealing performance and does not influence the torsion of the rotating shaft.
Preferably, the sealant is epoxy glue.
Therefore, the epoxy adhesive has low cost, and has better water resistance and chemical corrosion resistance after being cured, thereby being suitable for the working environment of the sensor.
Drawings
FIG. 1 is a schematic view of a first embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a second embodiment of the present invention;
FIG. 3 is a schematic structural view of a third embodiment of the present invention;
Fig. 4 is a schematic structural view of a turbidity sensor having a rotary shaft sealing structure according to the present invention.
The reference numerals indicate a rotating shaft 1, an end cover 2, a sealing sleeve 3, a connecting part 31, a first sealing sleeve 32, a second sealing sleeve 33, a plastic film 4, sealing glue 5, a turbidity sensor 6 and a cleaning brush head 7.
Detailed Description
The invention will be further described with reference to the drawings and examples.
Embodiment one:
As shown in fig. 1, the rotary shaft sealing structure of the sensor wiping and cleaning mechanism comprises a sealing sleeve 3 which is hollow and cylindrical as a whole, wherein the sealing sleeve 3 is sleeved outside a rotary shaft 1, one end of the sealing sleeve 3 extends into a space between the rotary shaft 1 and an end cover 2 along with the rotary shaft 1 and is fixedly and hermetically connected with the rotary shaft 1, the peripheral edge of the end part of the other end of the sealing sleeve 3 extends outwards to form a connecting part 31 which is fixedly and hermetically connected with the end cover 2, and a gap exists between the part of the outer ring of the sealing sleeve extending into the space between the end cover 2 and the rotary shaft 1 and the end cover 2.
When the sealing structure is used, one end of the sealing sleeve 3 which is in a hollow cylindrical shape integrally extends into a position between the end cover 2 and the rotating shaft 1, the other end of the sealing sleeve 3 is fixedly and hermetically connected with the end cover 2 through the connecting part 31, and when the rotating shaft 1 twists to drive the cleaning brush head to clean the probe surface of the sensor, the rotating shaft 1 drives the sealing sleeve 3 to twist together, at the moment, a gap exists between the part of the sealing sleeve 3 extending between the rotating shaft 1 and the end cover 2, so that friction is not easy to generate between the outer ring of the sealing sleeve 3 and the end cover 2 in the process of the rotating shaft 1 driving the sealing sleeve 3 to twist, and the outer ring of the sealing sleeve 3 is not easy to damage due to friction.
In the invention, in the twisting process of the rotating shaft 1, a gap exists between the outer ring of the sealing sleeve 3 and the end cover 2, so that friction is not easy to generate between the outer ring of the sealing sleeve 3 and the end cover 2, and the outer ring of the sealing sleeve 3 is not easy to damage due to friction.
In this embodiment, the outer ring of the sealing sleeve 3 is in a conical structure, the small end of the conical structure of the outer ring of the sealing sleeve 3 extends between the rotating shaft 1 and the end cover 2 along with the rotating shaft 1, the connecting part 31 is formed by extending the peripheral edge of the large end part of the conical structure of the outer ring of the sealing sleeve 3 outwards, and the peripheral edge of the large end part of the conical structure of the outer ring of the sealing sleeve 3 abuts against the end cover 2. When the sealing sleeve is specifically used, the sealing sleeve can be made into other structural forms, so long as a gap exists between the outer ring of the sealing sleeve and the end cover, friction is not easy to generate between the outer ring of the sealing sleeve and the end cover, and the sealing sleeve is not limited to the structural form in the invention.
Like this, through the outer lane design of seal cover 3 into the toper structure to make seal cover 3 toper structure big end tip edge just offset with end cover 2, like this, when installing seal cover 3 and end cover 2, utilize seal cover 3 toper structure big end's tip edge all around to limit between end cover 2, on the other hand, the toper structure makes the outer lane size of seal cover 3 that stretches into between pivot 1 and the end cover 2 reduce gradually, thereby make the clearance between the outer lane of seal cover 3 and the end cover 2 that stretch into between pivot 1 and the end cover 2 be greater than 0 all the time, guarantee that whole torsion in-process, seal cover 3 outer lane is difficult for producing friction with between the end cover 2.
In the embodiment, a flexible sealing film is sleeved on the part of the outer ring of the sealing sleeve 3 extending between the end cover 2 and the rotating shaft 1.
Therefore, a layer of sealing film is sleeved on the part, extending into the space between the end cover 2 and the rotating shaft 1, of the outer ring of the sealing sleeve 3, and even if the sealing sleeve 3 breaks after being twisted for many times and leaks water, the sealing film sleeved on the outer ring of the sealing sleeve 3 can be supported to play a role in preventing water and moisture, so that the sealing reliability of the matching position of the rotating shaft 1 and the end cover 2 is further improved.
In this embodiment, the sealing film is a plastic film 4.
Thus, the plastic film 4 is soft and has toughness, is not easy to be broken in the use process, has good sealing performance, and can still play a role in preventing water and moisture when the sealing sleeve 3 breaks and leaks water. Of course, in the specific use process, the sealing film can be made of other materials, so long as the manufactured sealing film can meet the characteristics of softness, toughness, sealing, difficult damage and the like, and the sealing film is not limited to one material of the plastic film provided by the invention.
In this embodiment, the sealing sleeve 3 is used for sealing and sealing the sealing glue 5 at the end part of the fixed and sealed connection position with the rotating shaft 1 and the end cover 2.
Like this, through the tip embedment sealant 5 at seal cover 3 and pivot 1 and the fixed sealing connection position of end cover 2, utilize sealant 5 to seal and fix seal cover 3 and end cover 2 and pivot 1 junction, ensure that outside moisture can not enter into the inside of sensor from the junction, further improve the reliability and the life of sensor work. Of course, in specific use, the position where the sealing sleeve 3 is fixedly and hermetically connected with the rotating shaft 1 and the end cover 2 may also be fixedly and hermetically connected by a screw pressing plate, or may also be fixedly and hermetically connected by other manners, which is not limited to the connection manner mentioned in the embodiment.
In this embodiment, a positioning protrusion is disposed at a portion of the rotating shaft 1 extending into the end cover 2, a positioning groove is disposed at a position of the inner ring of the sealing sleeve 3 corresponding to the positioning protrusion, and a sealant 5 is encapsulated at a position of the positioning groove matched with the positioning protrusion.
Like this, through design location arch on pivot 1, set up the constant head tank in the position that seal cover 3 inner circle and location arch correspond, spacing when utilizing location arch and constant head tank to realize being connected between pivot 1 and the seal cover 3, simultaneously at the bellied cooperation position embedment sealant 5 of constant head tank and location, prevent outside moisture from entering into inside the sensor by the cooperation department.
In this embodiment, the sealing sleeve 3 is a torsion sealing sleeve having strength and toughness.
Therefore, the torsion sealing sleeve can well twist along with the rotating shaft, and has certain strength and toughness, so that the torsion sealing sleeve is not easy to damage in the use process, and the good sealing performance of the torsion sealing sleeve is ensured.
In this embodiment, the torsion seal sleeve is made of a rubber material.
Therefore, the rubber material is soft and has certain elasticity, and the torsion sealing sleeve made of the rubber material can ensure the sealing performance and can not influence the torsion of the rotating shaft 1. Of course, in a specific use process, the torsion seal sleeve can be made of other materials, so long as the made torsion seal sleeve has certain strength, can twist and have toughness, can seal and is not easy to break, and the like, and the torsion seal sleeve is not limited to the rubber material provided by the invention.
In this embodiment, the sealant 5 is an epoxy adhesive.
Therefore, the epoxy adhesive has low cost, and has better water resistance and chemical corrosion resistance after being cured, thereby being suitable for the working environment of the sensor. Of course, in a specific use process, the sealant can also be made of other materials except epoxy glue, so long as the sealant has good sealing performance, and the sealant is not limited to one material of the epoxy glue provided by the invention.
In this embodiment, the connection portion 31 of the sealing sleeve 3 and the end cover 2 may be fixedly and sealingly connected by a screw, or may be fixedly and sealingly connected by other means, and the connection between the rotating shaft 1 and the sealing sleeve 3 may utilize the elasticity of the sealing sleeve 3 to enable the sealing sleeve 3 to be tightly sleeved on the rotating shaft 1, or may be fixedly and sealingly connected by gluing or other means.
Embodiment two:
The difference from the first embodiment is that:
As shown in fig. 2, in this embodiment, the outer ring of the sealing sleeve 3 is in a cylindrical structure, one end of the cylindrical structure of the outer ring of the sealing sleeve 3 extends between the rotating shaft 1 and the end cover 2 along with the rotating shaft 1, the peripheral edge of the end part of the other end of the cylindrical structure of the outer ring of the sealing sleeve 3 extends outwards to form a connecting part, and a gap exists between the part of the outer ring of the sealing sleeve 3 extending between the end cover 2 and the rotating shaft 1 and the end cover 2.
Like this, through designing the outer lane of seal cover into the cylindricality structure, utilize seal cover outer lane cylindricality structure's one end tip outwards to extend and form connecting portion and be used for being connected with the end cover, there is the clearance between the part that the seal cover outer lane stretches into between end cover and the pivot and the end cover simultaneously, guarantees whole torsion in-process, the difficult friction that produces between seal cover outer lane and the end cover.
Embodiment III:
As shown in fig. 3, the difference between the present embodiment and the first embodiment is that the sealing sleeve includes a first sealing sleeve 32 and a second sealing sleeve 33 which are axially distributed along the rotating shaft, the peripheral edge of one end of the first sealing sleeve 32 extends outwards to form a connecting portion 31 for fixedly sealing connection with the end cover 2, the end of the second sealing sleeve 33, which is far away from the first sealing sleeve 32, is fixedly sealing connected with the rotating shaft 1, a gap exists between the end of the second sealing sleeve 33, which is near to the first sealing sleeve 32, and the corresponding end of the first sealing sleeve 32, and a flexible sealing film 4 is further sleeved on the portion of the outer ring of the first sealing sleeve 32 extending into the space between the end cover 2 and the rotating shaft 1 and the outer ring of the second sealing sleeve 33.
In this way, the sealing sleeve is designed into the first sealing sleeve 32 and the second sealing sleeve 33 with a gap between the two sealing sleeves, the first sealing sleeve 32 is connected with the end cover 2 through the connecting part 31, the second sealing sleeve 33 is connected with the rotating shaft 1, and the sealing film 4 is sleeved at the part of the outer ring of the first sealing sleeve 32 extending into the space between the end cover 2 and the rotating shaft 1 and the outer ring of the second sealing sleeve 33, so that when the rotating shaft 1 twists, the rotating shaft 1 only drives the second sealing sleeve 33 fixedly connected with the rotating shaft 1 to twist, the first sealing sleeve 32 connected with the end cover 2 is in a static state, the sealing effect between the first sealing sleeve 32 and the second sealing sleeve 33 is realized by the sealing film 4, and the sealing film 4 is not easy to damage in the using process due to the fact that the first sealing sleeve 32 is not subjected to the torsion force, thereby further improving the service life of the sealing sleeve, and further achieving the purposes of improving the sealing reliability of the matching position of the end cover 2 and the rotating shaft 1 and the service life of the sensor.
Referring to fig. 4, a schematic structural diagram of the rotating shaft sealing structure of the present invention when the rotating shaft sealing structure is installed on the turbidity sensor 6 is shown, wherein the rotating shaft sealing structure of the present invention is installed at the position a of the turbidity sensor 6, and a cleaning brush head 7 is installed on the part of the rotating shaft extending out of the turbidity sensor, and the cleaning brush head 7 is used for cleaning the probe surface of the turbidity sensor 6.
Finally, it should be noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the technical solution, and those skilled in the art should understand that modifications and equivalents may be made to the technical solution of the present invention without departing from the spirit and scope of the present invention, and all such modifications and equivalents are included in the scope of the claims.