CN114607777B - Mechanical seal, machining method thereof and method for adjusting deformation degree of seal end face - Google Patents
Mechanical seal, machining method thereof and method for adjusting deformation degree of seal end face Download PDFInfo
- Publication number
- CN114607777B CN114607777B CN202210268877.3A CN202210268877A CN114607777B CN 114607777 B CN114607777 B CN 114607777B CN 202210268877 A CN202210268877 A CN 202210268877A CN 114607777 B CN114607777 B CN 114607777B
- Authority
- CN
- China
- Prior art keywords
- ring
- mechanical seal
- static
- mounting cavity
- sealing end
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000003754 machining Methods 0.000 title claims abstract description 10
- 230000003068 static effect Effects 0.000 claims abstract description 89
- 238000007789 sealing Methods 0.000 claims abstract description 82
- 239000000853 adhesive Substances 0.000 claims description 16
- 230000001070 adhesive effect Effects 0.000 claims description 16
- 239000000919 ceramic Substances 0.000 claims description 16
- 239000004593 Epoxy Substances 0.000 claims description 5
- 239000003292 glue Substances 0.000 claims description 3
- 238000005299 abrasion Methods 0.000 abstract description 4
- 238000009434 installation Methods 0.000 description 22
- 239000012530 fluid Substances 0.000 description 16
- 239000003822 epoxy resin Substances 0.000 description 4
- 229920000647 polyepoxide Polymers 0.000 description 4
- 229910010293 ceramic material Inorganic materials 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 230000010287 polarization Effects 0.000 description 2
- 238000003672 processing method Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/34—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member
- F16J15/3464—Mounting of the seal
- F16J15/3468—Means for controlling the deformations of the contacting faces
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/34—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member
- F16J15/3436—Pressing means
- F16J15/346—Pressing means the pressing force varying during operation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/40—Sealings between relatively-moving surfaces by means of fluid
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N2/00—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
- H02N2/02—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing linear motion, e.g. actuators; Linear positioners ; Linear motors
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N2/00—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
- H02N2/02—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing linear motion, e.g. actuators; Linear positioners ; Linear motors
- H02N2/06—Drive circuits; Control arrangements or methods
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mechanical Sealing (AREA)
- Sealing Devices (AREA)
Abstract
The invention relates to a mechanical seal, a machining method thereof and a method for adjusting deformation degree of a seal end face. The mechanical seal includes: a stationary ring, a movable ring, and an actuating member; the static ring and/or the moving ring are/is provided with a mounting cavity, and the actuating piece is arranged in the mounting cavity and used for axially expanding the inside of the static ring and/or the moving ring so as to adjust the deformation degree of the sealing end face of the static ring and/or the moving ring. According to the mechanical seal, the actuating piece can apply force to the static ring and/or the dynamic ring, so that the static ring and/or the dynamic ring axially expand, the sealing end faces of the static ring and/or the dynamic ring deform, the gap shapes of the two sealing end faces of the dynamic ring and the static ring can be adjusted, the gap between the two sealing end faces of the dynamic ring and the static ring can be controlled to be a convergence gap with smaller taper, and friction and abrasion can be effectively reduced, and leakage can be reduced.
Description
Technical Field
The invention relates to the technical field of mechanical sealing, in particular to a mechanical sealing, a machining method thereof and a method for adjusting deformation degree of a sealing end face.
Background
Mechanical seals are end face dynamic sealing devices that require reduced or eliminated frictional wear of friction pairs to extend life while maintaining low or no leakage. The mechanical seal mainly consists of a pair of sealing rings, one of which rotates with the shaft is called a moving ring, and the other of which does not rotate with the shaft is called a stationary ring. During operation, a fluid film is formed between the movable ring and the stationary ring, and the fluid film can reduce contact abrasion between the two sealing end surfaces of the movable ring and the stationary ring. The thickness of the fluid film influences the contact state of the two sealing end surfaces of the moving ring and the static ring, and the gap shape of the two sealing end surfaces of the moving ring and the static ring influences the thickness of the fluid film. The gap shapes of the two sealing end surfaces of the dynamic ring and the static ring are mainly divided into a convergence gap, a divergence gap and a parallel gap. In a normal working state, the gap between the two sealing end surfaces of the dynamic ring and the static ring is a convergence gap, the high-pressure fluid of the sealing end surfaces provides sealing opening force, if the convergence taper is increased, the opening force is increased, the average fluid film thickness is increased, and the sealing leakage is increased; conversely, the convergence taper is reduced, the opening force is reduced, the thickness of the fluid film is reduced, and the leakage is reduced; if a divergent gap or a parallel gap is generated, the fluid film may collapse directly, resulting in direct contact between the two end surfaces of the moving and stationary rings. Therefore, in order to reduce friction and wear and reduce leakage, it is necessary to adjust the deformation degree of the seal ring to ensure that the gap between the seal end surfaces of the moving and stationary rings is a converging gap with smaller taper.
Disclosure of Invention
In view of the above, it is necessary to provide a mechanical seal, a machining method thereof, and a method for adjusting the degree of deformation of a seal end face.
A mechanical seal, the mechanical seal comprising: a stationary ring, a movable ring, and an actuating member;
the static ring and/or the moving ring are/is provided with an installation cavity, and the actuating piece is arranged in the installation cavity and used for enabling the inside of the static ring and/or the moving ring to axially expand so as to adjust the deformation degree of the sealing end face of the static ring and/or the moving ring.
In one embodiment, the actuator is a piezoelectric element.
Alternatively, the piezoelectric element is a piezoelectric ceramic.
In one embodiment, the actuator is mounted on the stationary ring.
Thus, the actuating piece is arranged on the static ring, so that wiring of the actuating piece is facilitated.
In one embodiment, the mounting cavity is formed on the inner diameter surface or/and the outer diameter surface of the stationary ring. The arrangement is not only convenient for the opening of the installation cavity, but also convenient for the wiring of the actuating piece in the installation cavity.
Optionally, the mechanical seal further comprises a static ring seat and a cavity shell, wherein the static ring seat is fixedly connected with the cavity shell, and the static ring is fixedly connected to the static ring seat; the static ring seat is provided with a wiring hole, and a sealing ring is arranged between the static ring seat and the static ring, and the sealing ring not only plays a role in sealing, but also is used for separating a high-pressure area from a low-pressure area.
When the piezoelectric element is applied, the specific installation position of the installation cavity on the static ring can be set according to the required gap shapes and gap conicity of the two sealing end surfaces of the dynamic ring and the static ring, and the installation cavity is installed on the outer diameter surface of the static ring by way of example, and the tension of the piezoelectric element can control the gap shapes of the two sealing end surfaces of the dynamic ring and the static ring to be divergent deformation; as another example, the mounting cavity is mounted on the inner diameter surface of the static ring, and the tension of the piezoelectric element can control the gap shape of the two sealing end surfaces of the dynamic ring and the static ring to be convergent deformation; further, for example, the mounting cavities are mounted on the inner diameter surface and the outer diameter surface of the stationary ring, and the gap shapes of the two sealing end surfaces of the moving ring and the stationary ring are controlled to be convergent deformation or divergent deformation by controlling the stretching forces of the piezoelectric elements on the inner diameter surface and the outer diameter surface of the stationary ring. In addition, the number of the mounting cavities formed on the inner diameter surface or/and the outer diameter surface of the stationary ring can be set according to the required gap shape and the required gap taper of the two sealing end surfaces of the stationary ring and the stationary ring, and 1, 2, 3 or more piezoelectric elements can be respectively arranged on the inner diameter surface and the outer diameter surface of the stationary ring.
In one embodiment, the actuator is block-shaped or ring-shaped.
In application, the shape of the actuating member may be set according to the installation position of the installation cavity in consideration of the installation convenience, and for example, when the installation cavity is opened on the outer diameter surface of the stationary ring, the actuating member may be in a block shape or a ring shape; as a further example, the actuating member may be block-shaped when the mounting cavity is open on the inner diameter face of the stationary ring.
In one embodiment, the actuator is secured within the mounting cavity by an adhesive. By the arrangement, the actuating piece can be effectively prevented from falling off, and the normal operation of the mechanical seal is ensured.
In one embodiment, the adhesive is an epoxy. The adhesive is convenient to obtain and low in cost.
According to the mechanical seal, the actuating piece can apply force to the static ring and/or the dynamic ring, so that the static ring and/or the dynamic ring axially expand, the sealing end faces of the static ring and/or the dynamic ring deform, the gap shapes of the two sealing end faces of the dynamic ring and the static ring can be adjusted, the gap between the two sealing end faces of the dynamic ring and the static ring can be controlled to be a convergence gap with smaller taper, and friction and abrasion can be effectively reduced, and leakage can be reduced.
A method of machining a mechanical seal as claimed in any one of the preceding claims, the method comprising:
a mounting cavity is formed in the stationary ring and/or the movable ring of the mechanical seal, and then an actuating piece of the mechanical seal is arranged in the mounting cavity;
the actuating piece is used for axially expanding the inside of the static ring and/or the moving ring so as to adjust the deformation degree of the sealing end face of the static ring and/or the moving ring.
Optionally, before disposing the mechanically sealed actuator within the mounting cavity, the method further comprises: and grinding the contact surface of the mounting cavity matched with the actuating piece. Therefore, the flatness, parallelism and roughness of the contact surface of the mounting cavity and the actuating piece can be ensured, and the firm fixation between the mounting cavity and the actuating piece is ensured.
In one embodiment, the machining method further comprises, prior to disposing the mechanically sealed actuator within the mounting cavity:
the stationary ring and/or the moving ring are heated to expand the mounting cavity.
So arranged, the placement of the actuating member is facilitated.
In one embodiment, the positioning the mechanically sealed actuator within the mounting cavity comprises: an adhesive is used to position the mechanically sealed actuator within the mounting cavity.
Optionally, the adhesive is an epoxy. The adhesive is convenient to obtain and low in cost.
According to the mechanical seal prepared by the processing method, the actuating piece can apply force to the static ring and/or the dynamic ring, so that the static ring and/or the dynamic ring axially expand, the sealing end faces of the static ring and/or the dynamic ring deform, the gap shapes of the two sealing end faces of the dynamic ring and the static ring can be adjusted, the gap between the two sealing end faces of the dynamic ring and the static ring can be controlled to be a convergence gap with smaller taper, and friction wear and leakage can be effectively reduced.
A method of adjusting the degree of deformation of a seal face of a mechanical seal as claimed in any one of the preceding claims, the method comprising:
and (3) axially expanding the inside of the static ring and/or the moving ring by using an actuating piece so as to adjust the deformation degree of the sealing end surface of the static ring and/or the moving ring.
According to the method for adjusting the deformation degree of the sealing end face of the mechanical seal, the actuating piece can apply force to the static ring and/or the dynamic ring, so that the static ring and/or the dynamic ring axially expand, the sealing end face of the static ring and/or the dynamic ring deforms, the gap shapes of the two sealing end faces of the dynamic ring and the static ring can be adjusted, the gap between the two sealing end faces of the dynamic ring and the static ring can be controlled to be a convergence gap with smaller taper, and friction wear and leakage can be effectively reduced.
Drawings
FIG. 1 is a schematic view of the gap shape between two sealing end surfaces of a moving ring and a stationary ring according to an embodiment of the present invention;
FIG. 2 is a schematic view of a partial structure of a mechanical seal with an actuator mounted inside a stationary ring according to an embodiment of the present invention;
FIG. 3 is a schematic view of a partial construction of a mechanical seal with an actuator mounted on the outer diameter surface of a stationary ring according to another embodiment of the present invention;
FIG. 4 is a schematic view of a partial construction of a mechanical seal having an actuator mounted on an inner diameter surface of a stationary ring according to another embodiment of the present invention;
FIG. 5 is a schematic view of a partial structure of a mechanical seal with an actuator mounted within and outside diameter surfaces of a stationary ring according to another embodiment of the present invention.
Wherein, the reference numerals in the drawings are as follows:
100. a stationary ring; 200. a moving ring; 300. an actuator; 400. a cavity shell; 500. a stationary ring seat; 600. and (3) sealing rings.
Detailed Description
In order that the above objects, features and advantages of the invention will be readily understood, a more particular description of the invention will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the invention, whereby the invention is not limited to the specific embodiments disclosed below.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.
Mechanical seals are end face dynamic sealing devices that require reduced or eliminated frictional wear of friction pairs to extend life while maintaining low or no leakage. The mechanical seal is mainly composed of a pair of seal rings, one of which rotates with the shaft is called a dynamic ring 200, and the other of which does not rotate with the shaft is called a static ring 100. In operation, a fluid film is formed between the moving and stationary rings 100, which reduces contact wear between the sealing faces of the moving and stationary rings 100. The thickness of the fluid film affects the contact state of the sealing end surfaces of the moving and stationary rings 100, and the gap shape of the sealing end surfaces of the moving and stationary rings 100 affects the thickness of the fluid film. As shown in fig. 1, the gap shapes of the two sealing end surfaces of the moving ring 100 and the static ring are mainly divided into a converging gap, a diverging gap and a parallel gap. In a normal working state, the gap between the two sealing end surfaces of the dynamic ring 100 and the static ring 100 is a convergence gap, the high-pressure fluid of the sealing end surfaces provides a sealing opening force, if the convergence taper is increased, the opening force is increased, the average fluid film thickness is increased, and the sealing leakage is increased; conversely, the convergence taper is reduced, the opening force is reduced, the thickness of the fluid film is reduced, and the leakage is reduced; if a divergent gap or a parallel gap is created, the fluid film may collapse directly, resulting in direct contact between the two end surfaces of the moving and stationary rings 100. Wherein the arrows in fig. 1 represent the leakage direction of the fluid.
In order to reduce friction and wear and leakage, an embodiment of the present invention provides a mechanical seal, which can adjust the deformation degree of the sealing ring to ensure that the gap between the two sealing end surfaces of the dynamic ring 100 and the static ring 100 is a convergence gap with smaller taper.
As shown in fig. 2 to 5, the mechanical seal provided by the embodiment of the present invention includes: stationary ring 100, moving ring 200, and actuator 300; the static ring 100 and/or the moving ring 200 are provided with mounting cavities, and the actuating piece 300 is arranged in the mounting cavities and is used for axially expanding the inside of the static ring 100 and/or the moving ring 200 so as to adjust the deformation degree of the sealing end face of the static ring 100 and/or the moving ring 200.
According to the mechanical seal provided by the embodiment, the actuating piece 300 can apply force to the static ring 100 and/or the dynamic ring 200, so that the static ring 100 and/or the dynamic ring 200 axially expand, and the sealing end surfaces of the static ring 100 and/or the dynamic ring 200 deform, so that the gap shapes of the two sealing end surfaces of the dynamic ring 100 and the static ring 100 can be adjusted, the gap between the two sealing end surfaces of the dynamic ring 100 and the static ring 100 can be controlled to be a convergence gap with smaller taper, and friction and abrasion can be effectively reduced, and leakage can be reduced.
In some embodiments of the invention, the actuator 300 is a piezoelectric element, such as a piezoelectric ceramic. Such an actuator 300 is readily available and is effective to axially expand the interior of the stationary ring 100 and/or the moving ring 200. Among them, piezoelectric ceramics are a ceramic material capable of converting mechanical energy and electrical energy into each other. Applying a voltage across the piezoelectric ceramic produces a geometric strain proportional to the voltage. Depending on the relationship between the direction of the electric field and the polarization direction of the piezoelectric ceramic, the piezoelectric ceramic may produce either a positive strain or a tangential strain. When positive strain is generated, if displacement in the strain direction of the piezoelectric ceramic is limited, force with corresponding magnitude can be generated, the magnitude of the generated force is related to the elastic constant of the piezoelectric ceramic, and the deformation coordination relation is integrally satisfied.
Further, in particular some embodiments of the present invention, as shown in fig. 2-5, an actuator 300 is mounted on the stationary ring 100. The positioning of the actuator 300 on the stationary ring 100 facilitates wiring of the actuator 300.
Optionally, the mounting cavity is open on the inner or/and outer diameter face of the stationary ring 100. The inner ring of the stationary ring 100 is referred to as an inner diameter surface, and the outer ring is referred to as an outer diameter surface. So configured, not only is the opening of the mounting cavity facilitated, but the wiring of the actuator 300 within the mounting cavity is facilitated. As an example, as shown in fig. 2 to 5, the mechanical seal further includes a stationary ring seat 500 and a cavity case 400, the stationary ring seat 500 is fixedly connected with the cavity case 400, and the stationary ring 100 is fixedly connected with the stationary ring seat 500; the static ring seat 500 is provided with a wiring hole, and a sealing ring 600 is arranged between the static ring seat 500 and the static ring 100, and the sealing ring 600 not only plays a sealing role, but also is used for separating a high-pressure area from a low-pressure area.
In application, according to the required gap shapes and gap tapers of the two sealing end surfaces of the dynamic ring 100 and the static ring 100, specific mounting positions of the mounting cavities on the static ring 100 can be set, for example, as shown in fig. 3, the mounting cavities are mounted on the outer diameter surface of the static ring 100, and the piezoelectric element (i.e. the actuating element 300) can be stretched to control the gap shapes of the two sealing end surfaces of the dynamic ring 100 to be divergent deformation; as another example, as shown in fig. 4, the mounting cavity is mounted on the inner diameter surface of the stationary ring 100, and the piezoelectric element is stretched to control the gap shape between the two sealing end surfaces of the stationary ring 100 to be convergent deformation; as another example, as shown in fig. 5, the mounting cavities are mounted on the inner diameter surface and the outer diameter surface of the stationary ring 100, and the gap shapes of the two sealing end surfaces of the stationary ring 100 are controlled to be convergent deformation or divergent deformation by controlling the stretching forces of the piezoelectric elements on the inner diameter surface and the outer diameter surface of the stationary ring 100. In addition, the number of the mounting cavities formed on the inner diameter surface and/or the outer diameter surface of the stationary ring 100 may be set according to the required gap shape and gap taper of the two sealing end surfaces of the stationary ring 100, and 1, 2, 3 or more piezoelectric elements may be respectively disposed on the inner diameter surface and the outer diameter surface of the stationary ring 100. Wherein the plurality of piezoelectric elements may be uniformly or non-uniformly disposed on the inner or outer diameter surface of the stationary ring 100 in the circumferential direction.
Alternatively, the actuator 300 is block-shaped or ring-shaped. In application, in consideration of the degree of installation convenience, the shape of the actuating member 300 may be set according to the installation position of the installation cavity, and for example, as shown in fig. 3, when the installation cavity is opened on the outer diameter surface of the stationary ring 100, the actuating member 300 may be in a block shape or a ring shape; as another example, as shown in FIG. 3, when the mounting cavity is open on the inner diameter face of the stationary ring 100, the actuator 300 may be block-shaped.
In some embodiments of the invention, the actuator 300 may be secured within the mounting cavity by adhesive. By the installation mode, the actuator 300 can be effectively prevented from falling off, and normal operation of the mechanical seal is ensured. It should be noted that, when the actuator 300 is a piezoelectric element, the adhesive should be an insulating material. Optionally, the adhesive is an epoxy. The adhesive is convenient to obtain and low in cost. Before the actuator 300 is installed in the installation cavity, the static ring 100 or the dynamic ring 200 can be heated to expand the installation cavity; then, a proper amount of epoxy resin is smeared on the surfaces (the upper surface and the lower surface) of the actuating piece 300, so that the epoxy resin can fill all gaps of the mounting cavity after the actuating piece 300 is assembled; after the actuator 300 is installed, the excess glue is removed.
Another embodiment of the present invention provides a method for processing a mechanical seal as described above, the method comprising:
a mounting cavity is formed on the stationary ring 100 and/or the moving ring 200 of the mechanical seal, and then the actuating member 300 of the mechanical seal is arranged in the mounting cavity; the actuating piece 300 is used for axially expanding the inside of the static ring 100 and/or the moving ring 200, so as to adjust the deformation degree of the sealing end surface of the static ring 100 and/or the moving ring 200.
As one example, the actuator 300 is a piezoelectric element, such as a piezoelectric ceramic. Such an actuator 300 is readily available and is effective to axially expand the interior of the stationary ring 100 and/or the moving ring 200. Among them, piezoelectric ceramics are a ceramic material capable of converting mechanical energy and electrical energy into each other. Applying a voltage across the piezoelectric ceramic produces a geometric strain proportional to the voltage. Depending on the relationship between the direction of the electric field and the polarization direction of the piezoelectric ceramic, the piezoelectric ceramic may produce either a positive strain or a tangential strain. When positive strain is generated, if displacement in the strain direction of the piezoelectric ceramic is limited, force with corresponding magnitude can be generated, the magnitude of the generated force is related to the elastic constant of the piezoelectric ceramic, and the deformation coordination relation is integrally satisfied.
As an example, as shown in fig. 2 to 5, an actuator 300 is mounted on the stationary ring 100. The positioning of the actuator 300 on the stationary ring 100 facilitates wiring of the actuator 300. Wherein the mounting cavities may be formed in the inner or/and outer diameter surface of the stationary ring 100. The inner ring of the stationary ring 100 is referred to as an inner diameter surface, and the outer ring is referred to as an outer diameter surface. So configured, not only is the opening of the mounting cavity facilitated, but the wiring of the actuator 300 within the mounting cavity is facilitated. As an example, as shown in fig. 2 and 3, the mechanical seal further includes a stationary ring seat 500 and a cavity shell 400, the stationary ring seat 500 is fixedly connected with the cavity shell 400, and the stationary ring 100 is fixedly connected with the stationary ring seat 500; the static ring seat 500 is provided with a wiring hole, and a sealing ring 600 is arranged between the static ring seat 500 and the static ring 100, and the sealing ring 600 is used for separating a high-pressure area from a low-pressure area.
In application, according to the required gap shapes and gap tapers of the two sealing end surfaces of the dynamic ring 100 and the static ring 100, specific mounting positions of the mounting cavities on the static ring 100 can be set, for example, as shown in fig. 3, the mounting cavities are mounted on the outer diameter surface of the static ring 100, and the piezoelectric element (i.e. the actuating element 300) can be stretched to control the gap shapes of the two sealing end surfaces of the dynamic ring 100 to be divergent deformation; as another example, as shown in fig. 4, the mounting cavity is mounted on the inner diameter surface of the stationary ring 100, and the piezoelectric element is stretched to control the gap shape between the two sealing end surfaces of the stationary ring 100 to be convergent deformation; as another example, as shown in fig. 5, the mounting cavities are mounted on the inner diameter surface and the outer diameter surface of the stationary ring 100, and the gap shapes of the two sealing end surfaces of the stationary ring 100 are controlled to be convergent deformation or divergent deformation by controlling the stretching forces of the piezoelectric elements on the inner diameter surface and the outer diameter surface of the stationary ring 100. In addition, the number of the mounting cavities formed on the inner diameter surface and/or the outer diameter surface of the stationary ring 100 may be set according to the required gap shape and gap taper of the two sealing end surfaces of the stationary ring 100, and 1, 2, 3 or more piezoelectric elements may be respectively disposed on the inner diameter surface and the outer diameter surface of the stationary ring 100.
As one example, the actuator 300 is block-shaped or ring-shaped. In application, in consideration of the degree of installation convenience, the shape of the actuating member 300 may be set according to the installation position of the installation cavity, and for example, as shown in fig. 3, when the installation cavity is opened on the outer diameter surface of the stationary ring 100, the actuating member 300 may be in a block shape or a ring shape; as another example, as shown in fig. 4, when the mounting cavity is opened on the inner diameter surface of the stationary ring 100, the actuating member 300 may be in a block shape.
The mechanical seal actuating element 300 can apply force to the static ring 100 and/or the moving ring 200 through the mechanical seal processed by the processing method, so that the static ring 100 and/or the moving ring 200 axially expand, and the sealing end surfaces of the static ring 100 and/or the moving ring 200 deform, thereby adjusting the gap shapes of the two sealing end surfaces of the dynamic ring 100 and the static ring 100, controlling the gap between the two sealing end surfaces of the dynamic ring 100 and the static ring 100 to be a convergence gap with smaller taper, and effectively reducing friction wear and leakage.
In some embodiments of the invention, the method of machining further comprises, prior to disposing the mechanically sealed actuator 300 within the mounting cavity: the contact surface of the mounting cavity with the actuator 300 is ground. This ensures the flatness, parallelism and roughness of the contact surface between the mounting cavity and the actuator 300, and ensures the fastening firmness between the mounting cavity and the actuator 300.
In some embodiments of the invention, the method of machining further comprises, prior to disposing the mechanically sealed actuator 300 within the mounting cavity: the stationary ring 100 and/or the moving ring 200 are heated to expand the mounting cavity. In this manner, placement of the actuator 300 is facilitated.
In some embodiments of the invention, an adhesive may be used to place the mechanically sealed actuator 300 within the mounting cavity. It should be noted that, when the actuator 300 is a piezoelectric element, the adhesive should be an insulating material. Optionally, the adhesive is an epoxy. The adhesive is convenient to obtain and low in cost. The surface (the upper surface and the lower surface) of the actuating piece 300 is coated with a proper amount of epoxy resin, so that the epoxy resin can fill all gaps of the mounting cavity after the actuating piece 300 is assembled; after the actuator 300 is installed, the excess glue is removed.
Another embodiment of the present invention provides a method for adjusting the deformation degree of the sealing end face of the mechanical seal according to any one of the above, the method comprising: the inner portion of the stationary ring 100 and/or the movable ring 200 is axially expanded by the actuator 300, thereby adjusting the degree of deformation of the seal end surface of the stationary ring 100 and/or the movable ring 200.
In the method for adjusting the deformation degree of the sealing end surface of the mechanical seal, the actuating piece 300 can be utilized to apply force to the static ring 100 and/or the moving ring 200, so that the static ring 100 and/or the moving ring 200 axially expand, the sealing end surface of the static ring 100 and/or the moving ring 200 is deformed, the gap shapes of the two sealing end surfaces of the dynamic ring 100 and the static ring 100 can be adjusted, the gap between the two sealing end surfaces of the dynamic ring 100 and the static ring 100 can be controlled to be a convergence gap with smaller taper, and friction wear and leakage can be effectively reduced.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (8)
1. A mechanical seal, the mechanical seal comprising: a stationary ring (100), a movable ring (200), and an actuator (300);
a mounting cavity is formed in the inner diameter surface or/and the outer diameter surface of the stationary ring (100), and the actuating piece (300) is arranged in the mounting cavity and used for applying force to the stationary ring (100) so as to axially expand the interior of the stationary ring (100) and/or the movable ring (200) and further adjust the deformation degree of the sealing end surface of the stationary ring (100); wherein the actuating element is a piezoelectric ceramic.
2. The mechanical seal of claim 1, wherein the actuator (300) is block-shaped or ring-shaped.
3. The mechanical seal according to any of claims 1 or 2, wherein the actuating member (300) is secured within the mounting cavity by an adhesive.
4. A mechanical seal according to claim 3, wherein the glue is an epoxy.
5. A method of machining a mechanical seal according to any one of claims 1 to 4, comprising:
a mounting cavity is formed in the stationary ring (100) of the mechanical seal, and then an actuating member (300) of the mechanical seal is arranged in the mounting cavity;
the actuating piece (300) is used for axially expanding the inside of the static ring (100) so as to adjust the deformation degree of the sealing end face of the static ring (100).
6. The method of processing according to claim 5, wherein the mechanical seal actuating member (300) is disposed within the mounting cavity prior to the processing further comprising:
the stationary ring (100) is heated to expand the mounting cavity.
7. The method of processing according to claim 5, wherein said disposing said mechanically sealed actuator (300) within said mounting cavity comprises: an actuator (300) of the mechanical seal is disposed within the mounting cavity with an adhesive.
8. A method of adjusting the degree of deformation of a seal face of a mechanical seal as claimed in any one of claims 1 to 4, comprising:
the inner part of the static ring (100) is axially expanded by an actuating piece (300), so that the deformation degree of the sealing end surface of the static ring (100) is adjusted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210268877.3A CN114607777B (en) | 2022-03-18 | 2022-03-18 | Mechanical seal, machining method thereof and method for adjusting deformation degree of seal end face |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210268877.3A CN114607777B (en) | 2022-03-18 | 2022-03-18 | Mechanical seal, machining method thereof and method for adjusting deformation degree of seal end face |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114607777A CN114607777A (en) | 2022-06-10 |
| CN114607777B true CN114607777B (en) | 2023-08-25 |
Family
ID=81864733
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210268877.3A Active CN114607777B (en) | 2022-03-18 | 2022-03-18 | Mechanical seal, machining method thereof and method for adjusting deformation degree of seal end face |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114607777B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86106923A (en) * | 1985-10-21 | 1987-06-03 | 博格-华纳工业产品公司 | Controllable mechanical sealing |
| CN103836196A (en) * | 2014-01-26 | 2014-06-04 | 清华大学 | Intelligent fluid dynamic pressure mechanical seal device achieving rotating speed self-adaption |
| JP2015059601A (en) * | 2013-09-18 | 2015-03-30 | イーグル工業株式会社 | Shaft sealing device |
| CN105114627A (en) * | 2015-07-24 | 2015-12-02 | 西华大学 | Mechanical seal device with seal rings with controllable cone bevel seal end faces |
| CN207989740U (en) * | 2018-02-27 | 2018-10-19 | 清华大学 | Adjustable type mechanically-sealing apparatus |
| CN113944756A (en) * | 2021-09-29 | 2022-01-18 | 浙江工业大学 | Gap-controllable mechanical sealing device based on hinge structure |
-
2022
- 2022-03-18 CN CN202210268877.3A patent/CN114607777B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86106923A (en) * | 1985-10-21 | 1987-06-03 | 博格-华纳工业产品公司 | Controllable mechanical sealing |
| JP2015059601A (en) * | 2013-09-18 | 2015-03-30 | イーグル工業株式会社 | Shaft sealing device |
| CN103836196A (en) * | 2014-01-26 | 2014-06-04 | 清华大学 | Intelligent fluid dynamic pressure mechanical seal device achieving rotating speed self-adaption |
| CN105114627A (en) * | 2015-07-24 | 2015-12-02 | 西华大学 | Mechanical seal device with seal rings with controllable cone bevel seal end faces |
| CN207989740U (en) * | 2018-02-27 | 2018-10-19 | 清华大学 | Adjustable type mechanically-sealing apparatus |
| CN113944756A (en) * | 2021-09-29 | 2022-01-18 | 浙江工业大学 | Gap-controllable mechanical sealing device based on hinge structure |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114607777A (en) | 2022-06-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4643437A (en) | Mechanical seal with automatic gap convergence control | |
| EP0568974B1 (en) | Adjustable gap hydrostatic element | |
| US3822890A (en) | Bearing seals | |
| EP0591586B1 (en) | Seal for a rotating member | |
| CN102483163B (en) | Seal And Seal Arrangement | |
| JP2001343021A (en) | Supporting method for vacuum bearing structure and movable part | |
| EP0588570B1 (en) | Valve | |
| KR20130140055A (en) | Seal device | |
| JP5330670B2 (en) | Improved fluid actuator for application inside a turbomachine | |
| CN114607777B (en) | Mechanical seal, machining method thereof and method for adjusting deformation degree of seal end face | |
| US3869344A (en) | Flexible ceramic member having a pre-loaded tensile force applying means | |
| CN114623239B (en) | Mechanical seal and method for adjusting deformation degree of sealing end face thereof | |
| US11015648B2 (en) | Adjusting sleeve for a bearing device, bearing device having an adjusting sleeve, and method for mounting an adjusting sleeve | |
| JPS62101972A (en) | Adjustable mechanical seal | |
| JPH09126228A (en) | Pressure dam type journal bearing | |
| JP3143582B2 (en) | Hydrostatic bearing device and positioning stage using the same | |
| JPH0714697Y2 (en) | Non-contact sealing device | |
| JPH11270691A (en) | Sealing device | |
| JP2004028307A (en) | Bearing support structure for jet engine | |
| EP4151890A1 (en) | Hydraulic machine | |
| US20050211937A1 (en) | Method of sealing machine components | |
| KR0161615B1 (en) | Metal seat device of a valve | |
| CN115962283A (en) | Mechanical sealing device capable of being regulated and controlled on line | |
| JPH10231938A (en) | Non-contact type mechanical seal | |
| KR20180037356A (en) | Bladder for carrier head in chemical mechanical polishing system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |