WO2014168013A1 - メカニカルシール - Google Patents
メカニカルシール Download PDFInfo
- Publication number
- WO2014168013A1 WO2014168013A1 PCT/JP2014/058833 JP2014058833W WO2014168013A1 WO 2014168013 A1 WO2014168013 A1 WO 2014168013A1 JP 2014058833 W JP2014058833 W JP 2014058833W WO 2014168013 A1 WO2014168013 A1 WO 2014168013A1
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- WO
- WIPO (PCT)
- Prior art keywords
- ring
- divided bodies
- seal
- mechanical seal
- annular member
- Prior art date
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Classifications
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- 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
- F16J15/3488—Split-rings
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- 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
- F16J15/3452—Pressing means the pressing force resulting from the action of a spring
Definitions
- the present invention relates to a mechanical seal provided with a split seal ring.
- the seal ring is divided from the viewpoint of wearability and the like, and a technique for forming an annular seal ring by combining these divided parts when attaching to the attachment location is known.
- the seal ring in the mechanical seal is often made of ceramics (plastic material) such as SiC or alumina.
- the divided bodies cannot be fixed using a fastener such as a bolt. Therefore, a structure is adopted in which the plurality of divided bodies are fixed while being positioned by tightening the outer peripheral surface with a clamping ring in a state in which the plurality of divided bodies are combined (see Patent Document 1).
- An object of the present invention is to provide a mechanical seal capable of simplifying and downsizing a structure for fixing a plurality of divided bodies constituting a seal ring.
- the present invention employs the following means in order to solve the above problems.
- the mechanical seal of the present invention is A mechanical seal that seals an annular gap between the rotating shaft and the housing,
- a mechanical seal including a split type seal ring in which an annular seal ring is configured by combining a plurality of divided parts.
- a metal band for fixing the plurality of divided bodies is provided by tightening the outer peripheral surfaces of the plurality of divided bodies.
- the plurality of divided bodies are fixed by fastening the outer peripheral surfaces of the plurality of divided bodies with a metal band. Therefore, the structure can be simplified and downsized as compared with the structure in which the plurality of divided bodies are fixed by the clamping ring. Further, the outer peripheral surfaces of the plurality of divided bodies can be tightened with a substantially uniform tightening force over the entire circumference.
- the seal ring may be provided with a spring hole in which a spring for urging the seal ring in the axial direction is mounted.
- the structure can be reduced in size as compared with the case where the spring hole is provided in the clamping ring.
- the seal ring may be formed with an engaged portion to which a rotation preventing portion provided on the rotating shaft side or the housing side is engaged.
- the structure can be reduced in size compared to the case where the engaged portion is provided in the clamping ring.
- annular groove is formed on the outer periphery of the seal ring, By being fitted into the annular groove, an annular member for positioning in the axial direction between a plurality of divided bodies is provided, In a state where the plurality of divided bodies are positioned in the axial direction by the annular member, the plurality of divided bodies may be fixed by fastening the outer peripheral surfaces of the plurality of divided bodies with the metal band. .
- the plurality of divided bodies are positioned in the axial direction.
- the plurality of divided bodies are fixed by tightening the outer peripheral surfaces of the plurality of divided bodies with a metal band. Thereby, it is possible to accurately perform both the positioning in the axial direction and the positioning in the radial direction of the plurality of divided bodies.
- the annular member may be formed with a spring hole in which a spring for urging the seal ring in the axial direction is mounted.
- annular member This allows the annular member to have both the function of positioning the plurality of divided bodies in the axial direction and the function of supporting the spring.
- FIG. 1 is a plan view showing a main configuration (seal ring and annular member) of a mechanical seal according to Embodiment 1 of the present invention.
- FIG. 2 is a schematic cross-sectional view showing a mounting state of the mechanical seal according to the first embodiment of the present invention.
- FIG. 3 is a side view of the hose band.
- FIG. 4 is a front view of the hose band.
- FIG. 5 is a schematic cross-sectional view showing a mounted state of the mechanical seal according to the second embodiment of the present invention.
- FIG. 6 is a schematic cross-sectional view showing a mounted state of the mechanical seal according to the third embodiment of the present invention.
- Example 1 A mechanical seal according to Embodiment 1 of the present invention will be described with reference to FIGS.
- FIG. 1 is a plan view showing a seal ring and an annular member, which are the main components of a mechanical seal according to Embodiment 1 of the present invention.
- FIG. 2 is a schematic cross-sectional view showing a mounting state of the mechanical seal according to the first embodiment of the present invention.
- the mechanical seal in FIG. 2 has shown the cross section cut
- FIG. 3 is a side view of the hose band
- FIG. 4 is a front view of the hose band. 4 is a view of the hose band in FIG.
- the mechanical seal 100 is an outside seal provided with a fixed ring unit 200 and a rotary ring unit 300, and plays a role of sealing an annular gap between the rotary shaft 500 and the housing 600. That is, in the mechanical seal 100, the sealing target fluid on the sealing target fluid side (A) sealed in the annular gap between the rotating shaft 500 and the housing 600 leaks from the inner peripheral side to the outer peripheral side (B). Used to prevent. Further, the mechanical seal 100 according to the present embodiment is a stationary seal, and an operating portion such as a spring 240 is provided on the stationary ring unit 200 side.
- the fixed ring unit 200 is an annular member that performs positioning in the axial direction of a fixed ring 210 as an annular seal ring and a plurality of divided bodies (hereinafter referred to as divided bodies 210A and 210B) constituting the fixed ring 210, as appropriate.
- 220 and a hose band 230 as a fixing member for fixing the plurality of divided bodies 210A and 210B by fastening the outer peripheral surfaces of the plurality of divided bodies 210A and 210B.
- the hose band 130 is generally used to fix the hose to a faucet or the like, and is also called a hose clip.
- the “axial direction” means the axial direction of the rotating shaft 500. The same applies hereinafter.
- FIG. 1 corresponds to a view of the fixed ring 210 and the annular member 220 viewed from the right side in the axial direction in FIG.
- the fixed ring 210 and the annular member 220 in FIG. 2 correspond to the AA cross-sectional view in FIG.
- the fixed ring unit 200 configured in this way is attached to the housing 600. That is, the fixed ring unit 200 is attached to the housing 600 by inserting the pin 610 attached to the end surface of the housing 600 into the through hole 221 provided in the annular member 220.
- An annular groove 212 is formed on the outer peripheral side of the fixed ring 210. By mounting the O-ring O1 in the annular groove 212, the annular gap between the inner peripheral surface of the housing 600 and the outer peripheral surface of the fixed ring 210 is sealed.
- the annular member 220 is provided with a plurality of spring holes 222 in which the springs 240 are attached, and the springs 240 are attached to the plurality of spring holes 222, respectively.
- the fixed ring unit 200 is urged toward the rotating ring unit 300 side. That is, the fixed ring unit 200 is configured so as not to move with respect to the housing 600 by the pin 610 in the rotational direction, but is configured to be movable in the axial direction.
- the annular member 220 is also provided with a pin that engages with a hole or notch formed in the stationary ring 210, and the stationary ring 210 moves in the rotational direction with respect to the annular member 220. It is configured not to.
- the rotary ring unit 300 also tightens the rotary ring 310 as an annular seal ring, the annular member 320 that positions the plurality of divided members constituting the rotary ring 310 in the axial direction, and the outer peripheral surfaces of the plurality of divided members.
- a hose band 330 as a fixing member for fixing the plurality of divided bodies is provided.
- the stationary ring 210, the annular member 220 and the hose band 230 constituting the stationary ring unit 200, and the rotating ring 310, the annular member 320 and the hose band 330 constituting the rotating ring unit 300 are respectively It consists of the same parts. Therefore, the plan view shown in FIG. 1 is the same as the plan view of the rotary ring unit 300. That is, FIG. 1 corresponds to a view of the rotary ring 310 and the annular member 320 viewed from the left side in the axial direction in FIG. Further, the rotating ring 310 and the annular member 320 in FIG. 2 correspond to the BB cross-sectional view in FIG.
- the rotating ring unit 300 configured in this way is attached to the rotating shaft 500. That is, the pin 253 attached to the collar 250 fixed to the rotating shaft 500 is inserted into the through hole 321 provided in the annular member 320, so that the rotating ring unit 300 is attached to the rotating shaft 500. That is, the rotary ring unit 300 is restricted from moving in the rotation direction by the pin 253 with respect to the collar 250.
- the annular member 320 is also provided with a pin that engages with a hole or notch formed in the rotating ring 310, and the rotating ring 310 moves in the rotational direction with respect to the annular member 320. It is configured not to.
- a stepped portion 312 is formed on the inner peripheral side of the rotating ring 310, and an O-ring O 2 is attached to the stepped portion 312, so that the outer peripheral surface of the rotating shaft 500 and the inner peripheral surface of the rotating ring 310 are The annular gap between is sealed.
- An annular groove 313 is formed on the outer peripheral side of the rotary ring 310, and an O-ring O 3 is attached to the annular groove 313, so that the space between the inner peripheral surface of the collar 250 and the outer peripheral surface of the rotary ring 310 is set.
- the annular gap is also sealed.
- the collar 250 is also composed of a divided body divided into two, and these two divided bodies are fixed by bolts 251. Thus, the annular collar 250 is configured by fixing the divided bodies.
- the collar 250 is fixed to the rotating shaft 500 by a set screw 252.
- the fixed ring unit 200 is urged toward the rotating ring unit 300 by the plurality of springs 240, so that the seal end surface 213 of the fixed ring 210 and the seal end surface 314 of the rotating ring 310 are separated. There is nothing. Note that both the seal end surface 213 of the fixed ring 210 and the seal end surface 314 of the rotating ring 310 are configured to taper toward the tip.
- the rotating ring unit 300 also rotates as the rotating shaft 500 rotates, and the seal end surface 314 of the rotating ring 310 and the seal end surface 213 of the stationary ring 210 are in close contact with each other. Slide while keeping Accordingly, leakage of the fluid to be sealed to the outer peripheral side (B) can be suppressed.
- the member which comprises the mechanical seal 100 is demonstrated in detail.
- the seal ring (fixed ring 210 and rotating ring 310) and the annular member (annular members 220 and 320) constituting the mechanical seal 100 according to the present embodiment are both divided into two parts from the viewpoint of mounting properties (necessity). It is a half structure which becomes an annular member by combining. That is, the mechanical seal 100 according to the present embodiment employs a split seal ring in which an annular seal ring is formed by combining a plurality of split bodies.
- the basic configuration of the fixed ring unit 200 and the rotary ring unit 300 is the same.
- the stationary ring 210, the annular member 220, and the hose band 230 that constitute the stationary ring unit 200, and the rotating ring 310, the annular member 320, and the hose band 330 that constitute the rotary ring unit 300 are These are composed of the same parts.
- the mechanical seal 100 according to the present embodiment is a stationary seal
- the springs 240 are respectively attached to the plurality of spring holes 222 provided in the annular member 220 on the stationary ring unit 200 side.
- the plurality of spring holes 322 provided in the annular member 320 on the rotating ring 310 side are empty. As shown in FIGS.
- the hose bands 230 and 330 include metal bands 231 and 331 and tightening bolts 232 and 332 for tightening the metal bands 231 and 331.
- the hose band (also referred to as a hose clip as described above) is a known technique and will not be described in detail.
- a metal band can be tightened or loosened by tightening or loosening a bolt. It is configured to be able to.
- the stationary ring 210 is made of ceramics (plastic material) such as SiC or alumina. And this fixed ring 210 is comprised from two division body 210A, 210B divided
- two notches 214 are provided on the inner peripheral side in order to make it easier to divide the annular member into two (see FIG. 1). Accordingly, by pulling the annular member in the left-right direction in FIG. 1, the portion provided with the notch 214 is broken, and two divided bodies 210A and 210B are obtained.
- channel 211 is formed in the outer periphery of the stationary ring 210 comprised by combining two division body 210A, 210B.
- the rotating ring 310 has the same configuration, and an annular groove 311 is formed on the outer periphery thereof.
- the annular member 220 is a metal or resin member, and an annular member is configured by combining two divided bodies (hereinafter, appropriately referred to as divided bodies 220A and 220B). These divided bodies 220 ⁇ / b> A and 220 ⁇ / b> B are fixed by bolts 223. Further, as described above, the annular member 220 is provided with a through hole 221 into which the pin 610 is inserted and a plurality of spring holes 222 into which the spring 240 is mounted.
- the annular member 320 has the same configuration.
- the annular stationary ring 210 is formed by combining the two divided bodies 210A and 210B. Then, the divided body 220 ⁇ / b> A and the divided body 220 ⁇ / b> B constituting the annular member 220 are fitted into the annular groove 211 formed in the fixed ring 210. At this time, it is desirable that the divided surfaces of the divided bodies 210A and 210B constituting the stationary ring 210 and the divided surfaces of the divided bodies 220A and 220B constituting the annular member 220 are shifted by 90 °. Then, the divided body 220A and the divided body 220B are fixed by bolts 223.
- the groove width of the annular groove 211 formed in the fixed ring 210 and the width (length in the axial direction) of the annular member 220 are designed to have the same dimension. Therefore, when the annular member 220 is fitted into the annular groove 211 formed in the fixed ring 210, the divided body 210A and the divided body 210B constituting the fixed ring 210 are positioned in the axial direction.
- the outer peripheral surfaces of the divided body 210A and the divided body 210B are tightened by the hose band 230.
- the divided body 210A and the divided body 210B are fixed.
- the fastening bolt 232 in the hose band 230 the outer peripheral surface of the stationary ring 210 composed of the divided body 210A and the divided body 210B is tightened, so that the outer peripheral surface of the stationary ring 210 is substantially uniform over the entire circumference. It can be tightened with a sufficient tightening force.
- the outer diameter of the outer peripheral surface of the portion fastened by the hose band 230 is larger than the outer diameter of the portion of the annular member 220 where the metal band 231 of the hose band 230 can contact. Designed. Accordingly, it is possible to suppress the tightening force by the metal band 231 from acting on the annular member 220. That is, the fastening force by the metal band 231 is designed to act only on the fixed ring 210.
- the assembly of the rotating ring unit 300 is the same as that of the fixed ring unit 200.
- the plurality of divided bodies are fixed by tightening the outer peripheral surfaces of the plurality of divided bodies with a metal band. That is, in the fixed ring unit 200, the plurality of divided bodies 210A and 210B are fixed by tightening the outer peripheral surfaces of the plurality of divided bodies 210A and 210B with the metal band 231. The same applies to the rotating ring unit 300. Therefore, the structure can be simplified and downsized as compared with the structure in which the plurality of divided bodies are fixed by the clamping ring.
- a general clamping ring is comprised from two members which become cyclic
- the tightening force near 90 ° from the position where the bolt is tightened becomes the highest, and the tightening force is not uniform in the circumferential direction. In connection with this, there exists a possibility that sealing performance may fall.
- the annular member is fitted into the annular groove formed on the outer periphery of the seal ring, thereby positioning the plurality of divided bodies in the axial direction.
- the annular member 220 is fitted into the annular groove 211 formed on the outer periphery of the fixed ring 210, whereby the plurality of divided bodies 210A and 210B are positioned in the axial direction.
- the rotating ring unit 300 The same applies to the rotating ring unit 300.
- the outer peripheral surfaces of the plurality of divided bodies are tightened by the metal band, thereby fixing the plurality of divided bodies. That is, in the fixed ring unit 200, the outer peripheral surfaces of the plurality of divided bodies 210 ⁇ / b> A and 210 ⁇ / b> B are tightened by the metal band 231 in a state where the plurality of divided bodies 210 ⁇ / b> A and 210 ⁇ / b> B are positioned in the axial direction by the annular member 220. As a result, the plurality of divided bodies 210A and 210B are fixed. The same applies to the rotating ring unit 300.
- the divided surfaces of the divided bodies 210A and 210B constituting the stationary ring 210 and the divided surfaces of the divided bodies 220A and 220B constituting the annular member 220 may be shifted in the circumferential direction (for example, 90 ° shifted) (FIG. 1). reference). The same applies to the rotating ring 310.
- a part of the fixing member (hose band 230, 330) is configured to wrap around the outer peripheral side of the annular member 220, 320 (see FIG. 2). Thereby, it can suppress that annular member 220,320 remove
- it is comprised so that the fastening force by the metal bands 231 and 331 in the hose bands 230 and 330 may not act on the annular members 220 and 320.
- the stationary ring 210, the annular member 220 and the hose band 230 constituting the stationary ring unit 200, and the rotating ring 310, the annular member 320 and the hose band 330 constituting the rotating ring unit 300 are the same. It consists of parts. Thereby, the cost of the mechanical seal 100 whole can be reduced.
- the annular member 220 is formed with a spring hole 222 in which a spring 240 for urging the stationary ring 210 in the axial direction is mounted.
- the annular member 220 can have both a function of positioning the plurality of divided bodies 210 ⁇ / b> A and 210 ⁇ / b> B in the axial direction and a function of supporting the spring 240. Thereby, the increase in a number of parts can be suppressed.
- FIG. 5 shows a second embodiment of the present invention.
- Example 1 the case where a stationary ring and a rotating ring were comprised with the same component was shown.
- this embodiment in order to make the mechanical seal compact, a case will be described in which the stationary ring and the rotating ring are composed of different parts. Since other basic configurations and operations are the same as those in the first embodiment, the same components are denoted by the same reference numerals and description thereof is omitted.
- the configuration of the rotary ring 310a as a seal ring constituting the rotary ring unit 300a is different from the configuration of the rotary ring 310 of the first embodiment.
- the rotating ring 310a according to the present example has the end opposite to the seal end surface 314 cut by cutting with respect to the rotating ring 310 in Example 1 in order to shorten the dimension in the axial direction. It has a configuration. Accordingly, the O-ring O3 is not provided in the present embodiment. Accordingly, the structure of the collar 250a is also simpler than that of the collar 250 in the first embodiment.
- the same effect as in the case of the first embodiment can be obtained. Further, in the case of the present embodiment, the axial length of the rotary ring 310a can be shortened compared to the case of the first embodiment, and the axial length of the entire mechanical seal 100 can be shortened. It becomes possible.
- FIG. 6 shows a third embodiment of the present invention.
- the structure in the case where an annular member is provided was shown.
- an annular member is not provided in order to make the mechanical seal compact.
- symbol is attached
- the mechanical seal 100 is also an outside seal provided with a fixed ring unit 200b and a rotary ring unit 300b as in the case of the above embodiments, and an annular gap between the rotary shaft 500 and the housing 600. It plays a role of sealing.
- the fixed ring unit 200b according to the present embodiment also includes a fixed ring 210b as an annular seal ring, as in the case of each of the above embodiments.
- the point that the fixed ring 210b is composed of a plurality of divided bodies is the same as in the case of each of the above embodiments.
- the stationary ring 210b can be configured by two divided bodies obtained by natural halving.
- the hose band 230 for fixing the plurality of divided bodies is provided is the same as in the above embodiments.
- annular member which performs the positioning of the axial direction of several division bodies is not provided. Accordingly, an annular groove for fitting the annular member is not provided on the outer periphery of the fixed ring 210b.
- the stationary ring unit 200b is also attached to the housing 600 in the same manner as in the above embodiments.
- a pin 620 as a detent portion attached to the end face of the housing 600 is inserted into an attachment hole 215 as an engaged portion provided in the fixed ring 210b itself (engagement). )
- the stationary ring unit 200b is attached to the housing 600.
- An annular groove 212 is formed on the outer peripheral side of the fixed ring 210b.
- a plurality of spring holes 216 in which the springs 240 are mounted are provided in the stationary ring 210b itself, and the springs 240 are mounted in the plurality of spring holes 216, respectively.
- the stationary ring unit 200b is urged toward the rotating ring unit 300b. That is, the fixed ring unit 200b is restricted from moving with respect to the housing 600 by the pin 620 in the rotational direction, but is configured to be movable in the axial direction.
- the rotary ring unit 300b is also provided with a rotary ring 310b as an annular seal ring. And about the point by which this rotary ring 310b is comprised from several division body, it is the same as that of the case of said each Example. Moreover, it is the same as that of the said each Example also about the point provided with the hose band 330 which fixes these some division body. And in the case of a present Example, unlike the case of said each Example, the cyclic
- the rotary ring unit 300b configured in this way is attached to the rotary shaft 500. That is, the pin 253 serving as a detent portion attached to the collar 250a fixed to the rotating shaft 500 is inserted into (engaged with) the attachment hole 315 serving as the engaged portion provided in the rotating ring 310b itself. ) Thereby, the rotary ring unit 300b is attached to the rotary shaft 500. That is, the rotary ring unit 300b is restricted from moving in the rotation direction by the pin 253 with respect to the collar 250a.
- the fixed ring unit 200b is biased toward the rotating ring unit 300b by the plurality of springs 240, so that the seal end surface 213 of the fixed ring 210b and the seal end surface 314 of the rotating ring 310b are separated. There is nothing.
- the rotating ring unit 300b also rotates with the rotation of the rotating shaft 500, and the seal end surface 314 of the rotating ring 310b and the seal end surface 213 of the fixed ring 210b are in close contact with each other. Slide while keeping. Accordingly, leakage of the fluid to be sealed to the outer peripheral side (B) can be suppressed.
- the seal rings (fixed ring 210b and rotating ring 310b) constituting the mechanical seal 100 according to the present embodiment are also two in view of the mounting property (necessity) as in the case of each of the above embodiments. It is a two-part structure that becomes an annular member by combining the divided bodies. That is, the mechanical seal 100 according to the present embodiment also employs a split seal ring in which an annular seal ring is formed by combining a plurality of split parts.
- the basic configuration of the fixed ring unit 200b and the rotary ring unit 300b is the same. Therefore, in the following description, in order to simplify the description, only the components on the stationary ring unit 200b side will be described in detail.
- the stationary ring 210b is made of ceramics (plastic material) such as SiC or alumina.
- the fixed ring 210b includes two divided bodies that are divided into two by pulling an annular member. And when assembling the stationary ring unit 200b, after combining the two divided bodies to form the annular stationary ring 210b, the outer peripheral surfaces of these two divided bodies are tightened by the metal band 231 in the hose band 230. Thereby, two division bodies are fixed. It should be noted that by tightening the fastening bolt 232 in the hose band 230, the outer peripheral surface of the stationary ring 210b composed of the two divided bodies is tightened by the metal band 231 so that the outer peripheral surface of the stationary ring 210b extends over the entire circumference. It can be tightened with almost uniform tightening force.
- the assembly of the rotating ring unit 300b is the same as that of the fixed ring unit 200b.
- the plurality of divided bodies are fixed by fastening the outer peripheral surfaces of the plurality of divided bodies with metal bands. Therefore, the structure can be simplified and downsized as compared with the structure in which the plurality of divided bodies are fixed by the clamping ring. Further, by fixing with the metal bands 231 and 331, there is also an advantage that the outer peripheral surface of the fixed ring 210b and the outer peripheral surface of the rotary ring 310b can be tightened with a substantially uniform tightening force over the entire circumference. Along with this, the sealing performance also increases.
- a spring hole 216 in which the spring 240 is mounted is formed in the stationary ring 210b itself. Therefore, in the conventional structure in which the plurality of divided bodies are fixed by the clamping ring, the structure can be reduced in size as compared with the case where the spring hole is provided in the clamping ring.
- an attachment hole 315 as an engaged portion with which the pin 253 provided on the rotating shaft 500 side (more specifically, the collar 250a fixed to the rotating shaft 500) is engaged.
- the rotating ring 310b is provided.
- An attachment hole 215 as an engaged portion with which the pin 620 provided on the housing 600 side is engaged is provided in the stationary ring 210b. Therefore, in the conventional structure in which a plurality of divided bodies are fixed by the clamping ring, the structure can be reduced in size as compared with the case where the engaged portion is provided in the clamping ring.
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Abstract
Description
回転軸とハウジングとの間の環状隙間を封止するメカニカルシールであって、
分割された複数の分割体を組み合わせることにより環状のシールリングが構成される分割型シールリングを備えるメカニカルシールにおいて、
複数の分割体の外周面を締め付けることで、これら複数の分割体を固定する金属製バンドを備えることを特徴とする。
前記環状溝に嵌合されることにより、複数の分割体同士の軸線方向の位置決めを行う環状部材を備え、
該環状部材によって複数の分割体同士の軸線方向の位置決めがなされた状態で、これら複数の分割体の外周面が前記金属製バンドにより締め付けられることで、これら複数の分割体が固定されるとよい。
図1~図4を参照して、本発明の実施例1に係るメカニカルシールについて説明する。
本発明の実施例1に係るメカニカルシールの全体構成等について説明する。図1は本発明の実施例1に係るメカニカルシールの主要構成であるシールリング及び環状部材を示す平面図である。図2は本発明の実施例1に係るメカニカルシールの装着状態を示す模式的断面図である。なお、図2中のメカニカルシールは、回転軸の中心軸線を含む面で切断した断面を示している。また、図3はホースバンドの側面図であり、図4はホースバンドの正面図である。なお、図4は図3中のホースバンドを矢印V方向に見た図である。
メカニカルシール100を構成する部材について、より詳細に説明する。本実施例に係るメカニカルシール100を構成するシールリング(固定環210及び回転環310)及び環状部材(環状部材220,320)は、装着性の観点(必要性)から、いずれも2つの分割体を組み合わせることによって環状の部材となる二つ割構造である。つまり、本実施例に係るメカニカルシール100においては、分割された複数の分割体を組み合わせることにより環状のシールリングが構成される分割型シールリングを採用している。
本実施例に係るメカニカルシール100によれば、複数の分割体の外周面が金属製バンドにより締め付けられることで、これら複数の分割体が固定される。すなわち、固定環ユニット200においては、複数の分割体210A,210Bの外周面が金属製バンド231により締め付けられることで、これら複数の分割体210A,210Bが固定される。回転環ユニット300においても同様である。従って、クランピングリングによって複数の分割体が固定される構造に比べて、構造の簡易化と小型化を可能とすることができる。また、金属製バンド231,331により固定することで、固定環210の外周面及び回転環310の外周面を全周に亘ってほぼ均一な締め付け力で締め付けることができるという利点もある。これに伴って、密封性も高くなる。なお、一般的なクランピングリングは、互いに組み合わせられることで環状になる2つの部材と、これら2つの部材を固定するボルトとから構成される。このように構成されるクランピングリングの場合、ボルトを締め付ける位置から90°ずれた付近の締め付け力が最も高くなり、締め付け力は周方向に均一にはならない。これに伴って、密封性が低下してしまうおそれがある。
図5には、本発明の実施例2が示されている。上記実施例1では、固定環と回転環が同一の部品にて構成される場合を示した。これに対して、本実施例ではメカニカルシールをコンパクトにするために、固定環と回転環が異なる部品で構成される場合を説明する。その他の基本的な構成および作用については実施例1と同一なので、同一の構成部分については同一の符号を付して、その説明は省略する。
図6には、本発明の実施例3が示されている。上記実施例1,2においては、複数の分割体同士の軸線方向の位置決めを行うために、環状部材が設けられる場合の構成を示した。これに対して、本実施例ではメカニカルシールをコンパクトにするために、環状部材が備えられない場合を説明する。なお、上記実施例1または実施例2と同一の構成については、同一の符号を付して、その説明は適宜省略する。
上記各実施例においては、シールリング(固定環,回転環)が2つの分割体から構成される場合を示した。しかしながら、本発明は、シールリングが3つ以上の分割体から構成される場合にも適用可能である。
200,200b 固定環ユニット
210,210b 固定環
210A,210B 分割体
211 環状溝
212 環状溝
213 シール端面
215 取り付け孔
216 スプリング孔
220 環状部材
220A,220B 分割体
221 貫通孔
222 スプリング孔
223 ボルト
230 ホースバンド
231 金属製バンド
232 ボルト
240 スプリング
250,250a カラー
251 ボルト
252 セットスクリュ
253 ピン
300,300a,300b 回転環ユニット
310,310a 回転環
311 環状溝
312 段差部
313 環状溝
314 シール端面
315 取り付け孔
320 環状部材
321 貫通孔
322 スプリング孔
330 ホースバンド
331 金属製バンド
332 ボルト
500 回転軸
600 ハウジング
610 ピン
O1,O2,O3 Oリング
Claims (5)
- 回転軸とハウジングとの間の環状隙間を封止するメカニカルシールであって、
分割された複数の分割体を組み合わせることにより環状のシールリングが構成される分割型シールリングを備えるメカニカルシールにおいて、
複数の分割体の外周面を締め付けることで、これら複数の分割体を固定する金属製バンドを備えることを特徴とするメカニカルシール。 - 前記シールリングには、該シールリングを軸線方向に付勢するスプリングが装着されるスプリング孔が形成されていることを特徴とする請求項1に記載のメカニカルシール。
- 前記シールリングには、回転軸側またはハウジング側に設けられる回り止め部が係合される被係合部が形成されていることを特徴とする請求項1に記載のメカニカルシール。
- 前記シールリングの外周には環状溝が形成されると共に、
前記環状溝に嵌合されることにより、複数の分割体同士の軸線方向の位置決めを行う環状部材を備え、
該環状部材によって複数の分割体同士の軸線方向の位置決めがなされた状態で、これら複数の分割体の外周面が前記金属製バンドにより締め付けられることで、これら複数の分割体が固定されることを特徴とする請求項1に記載のメカニカルシール。 - 前記環状部材には、前記シールリングを軸線方向に付勢するスプリングが装着されるスプリング孔が形成されていることを特徴とする請求項4に記載のメカニカルシール。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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JP2015511199A JP6283023B2 (ja) | 2013-04-08 | 2014-03-27 | メカニカルシール |
CN201480003324.9A CN104838187A (zh) | 2013-04-08 | 2014-03-27 | 机械密封件 |
US14/650,000 US9383019B2 (en) | 2013-04-08 | 2014-03-27 | Mechanical seal |
EP14783465.9A EP2985496A4 (en) | 2013-04-08 | 2014-03-27 | MECHANICAL SEAL |
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JP2013-080684 | 2013-04-08 | ||
JP2013080684 | 2013-04-08 |
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WO2014168013A1 true WO2014168013A1 (ja) | 2014-10-16 |
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PCT/JP2014/058833 WO2014168013A1 (ja) | 2013-04-08 | 2014-03-27 | メカニカルシール |
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US (1) | US9383019B2 (ja) |
EP (1) | EP2985496A4 (ja) |
JP (1) | JP6283023B2 (ja) |
CN (1) | CN104838187A (ja) |
WO (1) | WO2014168013A1 (ja) |
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US10619741B2 (en) | 2017-09-12 | 2020-04-14 | United Technologies Corporation | Contacting dry face seal with tapered carbon nose |
JP7111574B2 (ja) * | 2018-09-28 | 2022-08-02 | イーグル工業株式会社 | メカニカルシール |
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JPH0854067A (ja) * | 1994-08-10 | 1996-02-27 | Fukushiro Kogyo Kk | 完全分割型メカニカルシール |
JP2003166651A (ja) | 2001-11-30 | 2003-06-13 | Eagle Ind Co Ltd | メカニカルシール装置 |
JP2005140258A (ja) * | 2003-11-07 | 2005-06-02 | Eagle Ind Co Ltd | メカニカルシール装置 |
JP2013011325A (ja) * | 2011-06-30 | 2013-01-17 | Nippon Pillar Packing Co Ltd | メカニカルシール |
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US5188377A (en) * | 1989-12-05 | 1993-02-23 | Nuraseal Company, Limited | Externally-mounted, stationary-design, self-aligning rotary face seal |
JPH071062B2 (ja) * | 1990-11-20 | 1995-01-11 | 日本ピラー工業株式会社 | 軸封装置 |
US5662340A (en) * | 1996-04-08 | 1997-09-02 | Flex A Seal, Inc. | Fully split cartridge mechanical seal assembly |
US5913521A (en) * | 1997-08-29 | 1999-06-22 | John Crane Sealol Inc. | Rotating seal ring component kit for a mechanical split seal |
JP4271005B2 (ja) * | 2003-10-24 | 2009-06-03 | 株式会社タンケンシールセーコウ | 分割型環状体及び分割型メカニカルシール |
WO2007058306A1 (ja) * | 2005-11-17 | 2007-05-24 | Eagle Industry Co., Ltd. | メカニカルシール装置 |
JP5199342B2 (ja) * | 2008-05-09 | 2013-05-15 | イーグル工業株式会社 | 分割型メカニカルシール |
US8616555B2 (en) * | 2008-10-13 | 2013-12-31 | Schlumberger Technology Corporation | Packing assembly for reciprocating pumps |
CN201443591U (zh) * | 2009-07-30 | 2010-04-28 | 丹东市东升石化设备有限公司 | 一种节水机械密封装置 |
MX2012010455A (es) * | 2010-03-15 | 2012-10-03 | Crane John Inc | Montaje y metodo de sello dividido. |
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2014
- 2014-03-27 JP JP2015511199A patent/JP6283023B2/ja active Active
- 2014-03-27 WO PCT/JP2014/058833 patent/WO2014168013A1/ja active Application Filing
- 2014-03-27 EP EP14783465.9A patent/EP2985496A4/en not_active Withdrawn
- 2014-03-27 US US14/650,000 patent/US9383019B2/en not_active Expired - Fee Related
- 2014-03-27 CN CN201480003324.9A patent/CN104838187A/zh active Pending
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JPH0854067A (ja) * | 1994-08-10 | 1996-02-27 | Fukushiro Kogyo Kk | 完全分割型メカニカルシール |
JP2003166651A (ja) | 2001-11-30 | 2003-06-13 | Eagle Ind Co Ltd | メカニカルシール装置 |
JP2005140258A (ja) * | 2003-11-07 | 2005-06-02 | Eagle Ind Co Ltd | メカニカルシール装置 |
JP2013011325A (ja) * | 2011-06-30 | 2013-01-17 | Nippon Pillar Packing Co Ltd | メカニカルシール |
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EP2985496A1 (en) | 2016-02-17 |
US20150316153A1 (en) | 2015-11-05 |
CN104838187A (zh) | 2015-08-12 |
JPWO2014168013A1 (ja) | 2017-02-16 |
EP2985496A4 (en) | 2016-11-02 |
JP6283023B2 (ja) | 2018-02-21 |
US9383019B2 (en) | 2016-07-05 |
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