TWI494509B - Mechanical shaft seal - Google Patents
Mechanical shaft seal Download PDFInfo
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- TWI494509B TWI494509B TW102105088A TW102105088A TWI494509B TW I494509 B TWI494509 B TW I494509B TW 102105088 A TW102105088 A TW 102105088A TW 102105088 A TW102105088 A TW 102105088A TW I494509 B TWI494509 B TW I494509B
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Description
本發明關於一種密封裝置，尤指一種用於提供機械內部密封腔密封效果之機械軸封。The present invention relates to a sealing device, and more particularly to a mechanical shaft seal for providing a mechanical internal sealing cavity sealing effect.
現有技術安裝在機械設備的密封腔(例如：泵浦..)內的機械軸封，其通常設置在機械設備的旋轉軸穿出於密封腔之殼體一側處，機械軸封可提供限制內部加壓作用液體僅可停留在所設計的空間中流動之密封作用，避免液體流動至密封腔之殼體外造成損壞。現有的機械軸封包括有一固定環、一第一密封組件及一第二密封組件，每一密封組件分別包含有一迴轉環及一帶動環，帶動環及迴轉環之間設置有相互抵頂的彈簧及結合該帶動環及迴轉環的結合銷，該第一密封組件設置在密封腔中靠近機械設備內部作用液體之一側(以下稱液體側)，第二密封組件設置在密封腔中靠近殼體外之一側(以下稱為大氣側)，該兩密封組件之迴轉環分別與該固定環之兩端面相互抵靠接觸形成兩可相對摩擦轉動的密封面，該兩帶動環與旋轉軸相互結合且能夠同步轉動，藉由相對接觸及轉動的兩密封面隔離外側之加壓作用液體，提供加壓作用液體不會洩漏至外部環境。當該兩密封面相互接觸摩擦時會使其溫度提升，為了冷卻機械軸封且有助於防止作用液體通過密封面，通常會在兩密封面的內側處形成一冷卻室，並於冷卻室內部填充有冷卻液，藉由冷卻液導引至位於作用液體相反側的密封面側面處達到降溫及潤滑之效果。A prior art mechanical shaft seal mounted in a sealed chamber (eg, a pump..) of a mechanical device, typically disposed at a side of the housing through which the rotating shaft of the mechanical device passes through the sealed chamber, the mechanical shaft seal providing a limit The internal pressurizing liquid can only stay in the sealing action of the flow in the designed space, avoiding the damage caused by the liquid flowing outside the casing of the sealed chamber. The existing mechanical shaft seal includes a fixing ring, a first sealing component and a second sealing component. Each sealing component comprises a slewing ring and a driving ring respectively. The driving ring and the slewing ring are provided with springs abutting each other. And a combined pin of the driving ring and the slewing ring, the first sealing component is disposed in a sealing cavity near a side of the working liquid inside the mechanical device (hereinafter referred to as a liquid side), and the second sealing component is disposed in the sealing cavity near the outer casing One of the sides (hereinafter referred to as the atmosphere side), the slewing rings of the two sealing assemblies respectively abut against the end faces of the fixing ring to form two frictionally rotatable sealing faces, and the two driving rings and the rotating shaft are coupled to each other It can rotate synchronously, and the pressurizing liquid on the outer side is separated by the two sealing faces which are in contact with each other and rotate, so that the pressurized liquid does not leak to the external environment. When the two sealing surfaces are in contact with each other, the temperature thereof is raised. In order to cool the mechanical shaft seal and help prevent the liquid from passing through the sealing surface, a cooling chamber is usually formed at the inner side of the two sealing surfaces, and is cooled inside the cooling chamber. It is filled with a cooling liquid, and the cooling liquid is guided to the side of the sealing surface on the opposite side of the working liquid to achieve the effect of cooling and lubricating.
通常在機械軸封的密封結構中，設有平衡壓力之結構以導引加壓作用液體之壓力至液體端之帶動環上，同時可導引位於內側之冷卻液壓力至液體端之帶動環內側，如此有助於閉合密封面且提供密封面上保持足夠的閉合 力，以確保兩密封面形成適當的密封狀態，並且在密封組件間設置有密封環，透過密封環之阻擋及滑動而平衡作用液體之內向壓力及冷卻液的外向壓力，且使旋轉軸上所設之軸套與密封組件之間達成密封作用。然而，現有技術中的機械軸封在運轉一段時間後，作用液體中的雜質難免會沉積在第一密封組件之密封環的滑動空間，當該第一密封組件之迴轉環產生磨耗後，第一密封組件之帶動環即朝向大氣側方向滑移，且當該冷卻液之外向壓力大於作用液體之內向壓力時，第一密封組件中的密封環即維持於原位置而不會隨第一密封組件之帶動環一同移動，使該密封環相對於第一密封組件之帶動環進行了朝向液體側之移動，因此帶動環上所附著之雜質即會隨帶動環一同移動並移動至密封環處並與其相磨擦，導致密封環產生磨損並降低其密封效果，令冷卻液可能會溢出至作用液體中，此問題實有待加以改良。Generally, in the sealing structure of the mechanical shaft seal, a balance pressure structure is provided to guide the pressure of the pressurized liquid to the driving ring of the liquid end, and at the same time, the pressure of the coolant located inside can be guided to the inner side of the moving ring of the liquid end. This helps to close the sealing surface and provide a sufficient closure on the sealing surface Force to ensure that the two sealing faces form a proper sealing state, and a sealing ring is arranged between the sealing components, and the inner pressure of the liquid and the outward pressure of the cooling liquid are balanced by the blocking and sliding of the sealing ring, and the rotating shaft is placed on the rotating shaft A sealing effect is achieved between the sleeve and the sealing assembly. However, after the mechanical shaft seal in the prior art is operated for a period of time, impurities in the working liquid are inevitably deposited on the sliding space of the sealing ring of the first sealing assembly, and when the slewing ring of the first sealing assembly is worn, the first The driving ring of the sealing assembly slides toward the atmospheric side direction, and when the external pressure of the coolant is greater than the internal pressure of the working liquid, the sealing ring in the first sealing assembly is maintained in the original position without the first sealing assembly. The driving ring moves together to move the sealing ring toward the liquid side with respect to the driving ring of the first sealing assembly, so that the impurities attached to the driving ring move along with the driving ring and move to the sealing ring and The friction causes the seal ring to wear and lower its sealing effect, so that the coolant may overflow into the working liquid. This problem needs to be improved.
有鑑於現有技術的機械軸封的密封環可相對帶動環雙向滑動，在朝向液體側相對滑動時存有可能與雜質磨擦而磨損的疑慮，進而導致其密封效果降低的問題，本發明設計有一種機械軸封，其設有僅能相對帶動環朝向大氣側滑動的密封組件，可達到防止作用液體中之雜質進入構件內部的創作目的。In view of the fact that the sealing ring of the mechanical shaft seal of the prior art can slide in two directions with respect to the driving ring, there is a possibility of friction with the impurities and wear when sliding relatively toward the liquid side, thereby causing a problem that the sealing effect is lowered. The present invention has a design. The mechanical shaft seal is provided with a sealing assembly which can only slide relative to the driving ring toward the atmosphere side, and can achieve the purpose of preventing the impurities in the working liquid from entering the inside of the member.
本發明提供一種機械軸封，供安裝在一機械設備上，該機械設備具有一固定殼體、一密封腔室及一旋轉軸，該密封腔室具有一大氣側及一液體側，該機械軸封包括有一軸封座、一軸套、一固定環、一第一密封組件、一第二密封組件及一單向滑動阻隔組件；該軸封座固定在固定殼體上；該軸套套設固定在旋轉軸上，該軸套之兩端分別形成有一位於液體側之第一端及一位於大氣側之第二端，於其第一端處 形成有一階級部；固定環之外側壁面固定在該軸封座中，該固定環套設於軸套上；該第一密封組件包括有一第一帶動環及一第一迴轉環；該第一帶動環套設在該軸套之第一端以及該階級部上，該第一迴轉環套設在該軸套上且兩端分別抵靠該第一帶動環及該固定環之一側面；該第二密封組件設置在該轉動軸之第二端處，該軸套、固定環、該第一密封組件及第二密封組件之間形成有一冷卻室；該單向滑動阻隔組件包含有一第一密封環及一第二密封環且設置在該第一帶動環及軸套之間，該第一密封環、第二密封環與軸套之間的相對關係為固定，該第一密封環及第二密封環之間形成有一間隔區，該第一密封環及第二密封環僅能相對該第一帶動環朝向間隔區位移。The present invention provides a mechanical shaft seal for mounting on a mechanical device having a fixed housing, a sealed chamber and a rotating shaft, the sealed chamber having an atmospheric side and a liquid side, the mechanical shaft The seal includes a shaft seal seat, a sleeve sleeve, a retaining ring, a first seal assembly, a second seal assembly and a one-way sliding barrier assembly; the shaft seal seat is fixed on the fixed housing; the sleeve sleeve is fixed on the sleeve On the rotating shaft, the two ends of the sleeve are respectively formed with a first end on the liquid side and a second end on the atmospheric side, at the first end thereof Forming a step portion; the outer side wall surface of the fixing ring is fixed in the shaft sealing seat, the fixing ring is sleeved on the sleeve; the first sealing assembly comprises a first driving ring and a first rotating ring; The first slewing ring is sleeved on the sleeve and the two ends abut against the first driving ring and one side of the fixing ring; a second sealing assembly is disposed at the second end of the rotating shaft, a cooling chamber is formed between the sleeve, the fixing ring, the first sealing assembly and the second sealing assembly; the one-way sliding blocking assembly comprises a first sealing ring And a second sealing ring disposed between the first driving ring and the sleeve, the relative relationship between the first sealing ring and the second sealing ring and the sleeve is fixed, the first sealing ring and the second sealing A spacing zone is formed between the rings, and the first sealing ring and the second sealing ring are only displaceable relative to the first driving ring toward the spacing zone.
所述之機械軸封，其中該單向滑動阻隔組件處於內向壓力的狀態時，內向壓力推頂該第一密封環並朝向大氣側推頂該第一帶動環，而在第一迴轉環及固定環之接觸面上形成有一第一液壓作用區；當在外向壓力的狀態時，外向壓力朝向大氣側推頂該第一帶動環，在第一迴轉環及固定環之接觸面上形成有一第二液壓作用區。In the mechanical shaft seal, wherein the one-way sliding barrier assembly is in an inward pressure state, the inward pressure pushes the first sealing ring and pushes the first driving ring toward the atmospheric side, and in the first rotating ring and fixed a first hydraulically acting region is formed on the contact surface of the ring; when in the state of the outward pressure, the outward pressure pushes the first driving ring toward the atmospheric side, and a second surface is formed on the contact surface of the first rotating ring and the fixed ring. Hydraulic action zone.
所述之機械軸封，其中該第一液壓作用區的面積為第一迴轉環及固定環之接觸面積的50%~100%，該第二液壓作用區的面積為第一迴轉環及固定環之接觸面積的50%~100%。The mechanical shaft seal, wherein the area of the first hydraulic action zone is 50% to 100% of the contact area of the first slewing ring and the fixed ring, and the area of the second hydraulic action zone is the first slewing ring and the fixed ring The contact area is 50% to 100%.
所述之機械軸封，其中該第一帶動環上設有一卡止階級及一扣環；該單向滑動阻隔組件包含有一第一間隔環及一第二間隔環，該第一密封環為一橡膠環體且可滑動地套設在位於該軸套之階級部上，該第一間隔環及第 二間隔環可滑動的套設在該軸套之階級部且分別位於該第一密封環之兩側，該第二間隔環抵靠於該卡止階級，該第一間隔環抵頂於該扣環。The mechanical shaft seal, wherein the first driving ring is provided with a locking level and a buckle; the one-way sliding blocking component comprises a first spacing ring and a second spacing ring, the first sealing ring is a a rubber ring body slidably sleeved on a step portion of the sleeve, the first spacer ring and the first Two spacer rings are slidably sleeved on the step portion of the sleeve and respectively located at two sides of the first sealing ring, the second spacer ring abuts against the locking class, and the first spacer ring abuts against the buckle ring.
所述之機械軸封，其中該軸套之階級部的外環壁面上設有一外環槽，該外環槽之兩側形成有突出於階級部外壁面之突緣，該兩突緣的外徑大於階級部之外徑，該第二密封環套設於該外環槽上。The mechanical shaft seal, wherein an outer ring wall surface of the step portion of the sleeve portion is provided with an outer ring groove, and two sides of the outer ring groove are formed with a flange protruding from the outer wall surface of the step portion, the outer edges of the two flanges The diameter is greater than the outer diameter of the step portion, and the second sealing ring is sleeved on the outer ring groove.
所述之機械軸封，其中該階級部的外環壁面上縱向穿設有一平衡孔。The mechanical shaft seal has a balance hole longitudinally formed on an outer ring wall surface of the step portion.
藉上述技術手段的運用，在內向壓力狀態下，可藉由作用液體的內向壓力施加於單向滑動阻隔組件而產生有一第一液壓作用區，使第一迴轉環及固定環間產生密封作用；在外向壓力狀態下，冷卻液可流入至該第一帶動環及該軸套之階級部之間並朝向大氣側方向推頂第一帶動環，而形成有一第二液壓作用區，藉此保持第一迴轉環及固定環之間的密封作用；本發明之單向滑動阻隔組件的第一密封環可恆與第一帶動環一同移動，即便處於外向壓力的狀態下，也只會朝向於間隔區之方向移動，不會朝向於液體側相對移動，如此可防止第一密封環朝向液體側移動，因此可避免密封環與作用液體中之汙垢或顆粒產生磨擦及磨損，並有效避免污垢或顆粒進入於單向滑動阻隔組件處；當處於外向壓力的狀態下，該第二密封環可阻隔來自冷卻液體之壓力，由於該第二密封環僅能朝向於間隔區方向移動，防止第二密封環與冷卻液體中之雜質產生摩擦而磨損，因此可避免冷卻液及其雜質等進入第二密封環處；當內向壓力與外向壓力交互變換時，本發明之機械軸封也能保有相同的密封狀態，進而提供其構件具有應有的使用壽命，而能夠維持本發明之機械軸封的使用壽命。By the use of the above technical means, in the inward pressure state, a first hydraulic action zone can be generated by applying an inward pressure of the acting liquid to the one-way sliding barrier component to seal the first slewing ring and the retaining ring; In the outward pressure state, the coolant may flow between the first driving ring and the step portion of the sleeve and push the first driving ring toward the atmosphere side to form a second hydraulic acting region, thereby maintaining the first a sealing action between a slewing ring and a fixing ring; the first sealing ring of the unidirectional sliding barrier assembly of the present invention can be constantly moved together with the first driving ring, and only in the state of outward pressure, only the spacing zone is oriented The direction of movement does not move relative to the liquid side, thus preventing the first sealing ring from moving toward the liquid side, thereby avoiding friction and wear of the seal ring and the dirt or particles in the working liquid, and effectively preventing dirt or particles from entering. At a one-way sliding barrier assembly; when in an outward pressure state, the second sealing ring can block the pressure from the cooling liquid due to the second The sealing ring can only move toward the spacing direction, preventing the second sealing ring from rubbing and friction with the impurities in the cooling liquid, thereby preventing the coolant and its impurities from entering the second sealing ring; when the inward pressure interacts with the outward pressure In the case of a change, the mechanical shaft seal of the present invention can also maintain the same sealed state, thereby providing the member with the required service life while maintaining the service life of the mechanical shaft seal of the present invention.
10‧‧‧旋轉軸10‧‧‧Rotary axis
11‧‧‧固定殼體11‧‧‧Fixed housing
12‧‧‧密封腔室12‧‧‧ sealed chamber
13‧‧‧冷卻室13‧‧‧The cooling room
20‧‧‧軸封座20‧‧‧ shaft seal
21‧‧‧軸套21‧‧‧ bushings
210‧‧‧第一端210‧‧‧ first end
211‧‧‧第二端211‧‧‧ second end
22‧‧‧固定環22‧‧‧Fixed ring
220‧‧‧第一密封面220‧‧‧First sealing surface
221‧‧‧第二密封面221‧‧‧Second sealing surface
23‧‧‧階級部23‧‧ ‧Class Department
230‧‧‧外環槽230‧‧‧ outer ring groove
231‧‧‧突緣231‧‧‧ rim
232‧‧‧平衡孔232‧‧‧balance hole
233‧‧‧內環槽233‧‧‧ Inner ring groove
234‧‧‧O型環234‧‧‧O-ring
30‧‧‧第一帶動環30‧‧‧First driving ring
300‧‧‧第一環壁300‧‧‧First ring wall
301‧‧‧卡止階級301‧‧‧Killing class
302‧‧‧第二環壁302‧‧‧second ring wall
303‧‧‧彈簧槽303‧‧‧Spring slot
304‧‧‧銷槽304‧‧‧ pin slot
305‧‧‧扣環305‧‧‧ buckle
31‧‧‧第一迴轉環31‧‧‧First slewing ring
310‧‧‧磨擦面310‧‧‧ Friction surface
32‧‧‧驅動銷32‧‧‧Drives
33‧‧‧彈簧33‧‧‧ Spring
40‧‧‧第二迴轉環40‧‧‧Second slewing ring
400‧‧‧磨擦面400‧‧‧ Friction surface
41‧‧‧第二帶動環41‧‧‧Second driving ring
410‧‧‧彈簧槽410‧‧‧Spring slot
42‧‧‧彈簧42‧‧‧ Spring
43‧‧‧驅動銷43‧‧‧Drives
50‧‧‧單向滑動阻隔組件50‧‧‧One-way sliding barrier assembly
51‧‧‧第一密封環51‧‧‧First seal ring
52‧‧‧第一間隔環52‧‧‧First spacer ring
53‧‧‧第二間隔環53‧‧‧Second spacer ring
54‧‧‧第二密封環54‧‧‧Second seal ring
A、B‧‧‧液壓作用區A, B‧‧‧ hydraulic zone
C‧‧‧壁面C‧‧‧ wall
D‧‧‧間隔區D‧‧‧ compartment
圖1為本發明的剖面示意圖。Figure 1 is a schematic cross-sectional view of the present invention.
圖2為本發明的部分剖面示意圖。Figure 2 is a partial cross-sectional view of the present invention.
圖3為本發明位於內向壓力狀態之剖面示意圖。Figure 3 is a schematic cross-sectional view showing the inward pressure state of the present invention.
圖4為本發明位於外向壓力狀態之剖面示意圖。Figure 4 is a schematic cross-sectional view of the present invention in an outward pressure state.
本發明為一種機械軸封，請參閱圖1所示，可供安裝在一機械設備上，該機械設備可為一現有技術的泵浦，其具有一固定殼體11，該固定殼體11中具有一密封腔室12，密封腔室12內部可供容置作用液體，密封腔室12於固定殼體11上形成有一開口，該開口之一側為大氣側，密封腔室12內部為液體側。於密封腔室12中可轉動地設有一旋轉軸10，該旋轉軸10之一端穿出固定殼體11而位於大氣側處。本發明之機械軸封包括有一軸封座20、一軸套21、一固定環22、兩密封組件及一單向滑動阻隔組件50。The present invention is a mechanical shaft seal, as shown in FIG. 1, which can be mounted on a mechanical device, which can be a prior art pump having a fixed housing 11 in the fixed housing 11 The sealing chamber 12 has a sealing chamber 12 for receiving the liquid. The sealing chamber 12 defines an opening on the fixed housing 11. One side of the opening is the atmospheric side, and the inside of the sealed chamber 12 is the liquid side. . A rotary shaft 10 is rotatably disposed in the seal chamber 12, and one end of the rotary shaft 10 passes through the fixed housing 11 at the atmospheric side. The mechanical shaft seal of the present invention comprises a shaft seal 20, a sleeve 21, a retaining ring 22, two sealing assemblies and a one-way sliding barrier assembly 50.
該軸封座20以固定件固定在固定殼體11上且位於密封腔室12的開口處。The shaft seal seat 20 is fixed to the fixed housing 11 with a fixing member and is located at the opening of the sealed chamber 12.
該軸套21為一中空圓管體且套設固定在旋轉軸10上，該軸套21之兩端分別形成有一第一端210及一第二端211，該第一端210位於密封腔室12中之液體側處，該第二端211位於密封腔室12外之大氣側。該軸套21位於第一端210處之外環壁面突出形成有一階級部23，於該階級部23的外環壁面上設有一外環槽230，該外環槽230之兩側形成有突出於階級部23外壁面之突緣231，該兩突緣231的外徑大於階級部23之外徑。進一步於該階級部23的外環壁面上縱向穿設有一平衡孔232，該平衡孔232貫通至該階級部23的內環壁面上。該軸套21位於第一端210處之內環壁面上凹設有一內環槽233，於該內環槽233中設置有一O型環234。The sleeve 21 is a hollow tubular body and is sleeved and fixed on the rotating shaft 10. The two ends of the sleeve 21 are respectively formed with a first end 210 and a second end 211. The first end 210 is located in the sealed chamber. At the liquid side of 12, the second end 211 is located on the atmospheric side outside the sealed chamber 12. The sleeve 21 is located at the first end 210 and is formed with a step portion 23 on the outer wall surface of the ring portion. An outer ring groove 230 is formed on the outer ring wall surface of the step portion 23, and the outer ring groove 230 is formed on both sides thereof. The flange 231 of the outer wall surface of the class portion 23 has an outer diameter larger than the outer diameter of the step portion 23. Further, a balance hole 232 is formed in the longitudinal direction of the outer ring wall surface of the step portion 23, and the balance hole 232 penetrates to the inner ring wall surface of the step portion 23. An inner ring groove 233 is defined in the inner ring wall surface of the sleeve 21 at the first end 210, and an O-ring 234 is disposed in the inner ring groove 233.
該固定環22為一圓環型之環狀塊體，該固定環22之外側壁面固定在該軸封座20中，該固定環22套設於旋轉軸10及軸套21之中段處，該固定環22的內側環面與軸套21之外環壁面間具有一間距，該固定環22之兩端面分別形成為一第一密封面220及一第二密封面221，該第一密封面220朝向於液體側，該第二密封面221朝向於大氣側。The fixing ring 22 is a ring-shaped annular block, and the outer wall surface of the fixing ring 22 is fixed in the shaft sealing seat 20, and the fixing ring 22 is sleeved on the rotating shaft 10 and the middle portion of the sleeve 21, The inner ring surface of the retaining ring 22 and the outer ring surface of the sleeve 21 have a spacing. The two end faces of the fixing ring 22 are respectively formed as a first sealing surface 220 and a second sealing surface 221, and the first sealing surface 220 is formed. Facing the liquid side, the second sealing surface 221 is oriented toward the atmosphere side.
請參閱圖1及圖2所示，該第一密封組件包括有一第一帶動環30及一第一迴轉環31。Referring to FIG. 1 and FIG. 2 , the first sealing assembly includes a first driving ring 30 and a first rotating ring 31 .
該第一帶動環30為一圓環型之環體，其套設在該軸套21之第一端210以及該階級部23上，該第一帶動環30之朝向於液體側之一端外緣延伸形成有一第一環壁300，該第一環壁300之內側環面上凹設有一卡止階級301，該第一帶動環30朝向於大氣側之一端外緣延伸形成有一第二環壁302，該第一帶動環30之一側環面上分別設置有複數彈簧槽303及至少一銷槽304，於該第一帶動環30之第一環壁300上設置有一扣環305。於該銷槽304及軸套21之階級部23的內側端面上穿設驅動銷32，該驅動銷32令該第一帶動環30可與軸套21同步轉動。於該等彈簧槽303中設置彈簧33，該等彈簧33之兩端分別彈性抵頂於階級部23的內側端面及該彈簧槽303之槽面。The first driving ring 30 is a ring-shaped ring body, and is sleeved on the first end 210 of the sleeve 21 and the step portion 23, and the first driving ring 30 faces the outer edge of the liquid side. A first annular wall 300 is formed on the inner annular surface of the first annular wall 300. The first annular ring 302 is formed with a second annular wall 302 extending toward an outer edge of the atmospheric side. A plurality of spring slots 303 and at least one pin slot 304 are disposed on one of the side ring faces of the first driving ring 30, and a buckle ring 305 is disposed on the first ring wall 300 of the first driving ring 30. A driving pin 32 is disposed on the inner end surface of the pin portion 304 and the step portion 23 of the sleeve 21, and the driving pin 32 allows the first driving ring 30 to rotate synchronously with the sleeve 21. Springs 33 are disposed in the spring grooves 303, and the two ends of the springs 33 are elastically abutted against the inner end surface of the step portion 23 and the groove surface of the spring groove 303.
該第一迴轉環31為一圓環型之環狀塊體，其可移動地套設在該軸套21上且位於該第一帶動環30及該固定環22之間，該第一迴轉環31之內環壁面與軸套21之外環壁面間具有一間距，該第一迴轉環31之外側壁面與該第一帶動環30之第二環壁302之內壁面以緊配合之方式相互結合，該第一迴轉環31之另一端為一磨擦面310並與該固定環22之第一密封面220相互抵頂。The first slewing ring 31 is a ring-shaped annular block that is movably sleeved on the sleeve 21 and located between the first driving ring 30 and the fixing ring 22, the first slewing ring The inner wall surface of the first slewing ring 31 and the inner wall surface of the second ring wall 302 of the first slewing ring 30 are combined with each other in a tight fit. The other end of the first slewing ring 31 is a friction surface 310 and abuts against the first sealing surface 220 of the fixing ring 22 .
請參閱圖1所示，該第二密封組件包括有一第二迴轉環40及一第二帶動環41。Referring to FIG. 1 , the second sealing assembly includes a second slewing ring 40 and a second driving ring 41 .
該第二迴轉環40為一圓環型之環狀塊體，其可移動地套設在該軸套21之第二端211外壁面上且位於該固定環22之第二密封面221的一側，該第二迴轉環40具有一磨擦面400並與該固定環22之第二密封面221相互抵頂。The second slewing ring 40 is a ring-shaped annular block movably sleeved on the outer wall surface of the second end 211 of the sleeve 21 and located at the second sealing surface 221 of the fixing ring 22 . On the side, the second slewing ring 40 has a friction surface 400 and abuts against the second sealing surface 221 of the fixing ring 22.
該第二帶動環41為一圓環型之環體，該第二帶動環41結合固定在該軸套21之第二端211外壁面上，該第二帶動環41朝向於固定環22之一側面上設有彈簧槽410，於該彈簧槽410中設有一彈簧42，該彈簧42之兩端分別抵頂該彈簧槽410之槽面及該第二迴轉環40之一端面，於該第二迴轉環40及該第二帶動環41之間穿設有驅動銷43。The second driving ring 41 is a ring-shaped ring body, and the second driving ring 41 is fixedly coupled to the outer wall surface of the second end 211 of the sleeve 21 , and the second driving ring 41 faces one of the fixing rings 22 . a spring groove 410 is disposed on the side surface, and a spring 42 is disposed in the spring groove 410. The two ends of the spring 42 respectively abut against the groove surface of the spring groove 410 and one end surface of the second slewing ring 40. A driving pin 43 is disposed between the slewing ring 40 and the second driving ring 41.
該單向滑動阻隔組件50包含有一第一密封環51、一第一間隔環52、一第二間隔環53及一第二密封環54，該第一密封環51為一橡膠環體且套設在位於該軸套21之第一端210的階級部23上；該第一間隔環52及第二間隔環53為圓環狀之環體且分別可滑動的套設在該軸套21之第一端210的階級部23上，該第一間隔環52及第二間隔環53分別位於該第一密封環51之兩側處，其中第一間隔環52抵頂於該扣環305，該第二間隔環53抵靠於卡止階級301。該第二密封環54為一橡膠環體且套設於該外環槽230上。該第一密封環51與該平衡孔232之間的空間形成為一間隔區D。The unidirectional sliding barrier assembly 50 includes a first sealing ring 51, a first spacing ring 52, a second spacing ring 53 and a second sealing ring 54. The first sealing ring 51 is a rubber ring body and is sleeved. The first spacer ring 52 and the second spacer ring 53 are annular ring bodies and are respectively slidably sleeved on the sleeve portion 21 in the first portion 210 of the sleeve 21; The first spacer ring 52 and the second spacer ring 53 are respectively located at two sides of the first sealing ring 51, wherein the first spacer ring 52 abuts against the buckle 305. The two spacer rings 53 abut against the locking stage 301. The second sealing ring 54 is a rubber ring body and is sleeved on the outer ring groove 230. The space between the first seal ring 51 and the balance hole 232 is formed as a space D.
該軸套21及固定環22、一第一密封組件及一第二密封組件之間的間距處形成有一冷卻室13，於冷卻室13內部設有冷卻液。該機械設備內部之作用液體可被加壓流動至密封腔室12中，當作用液體之液體壓力大於冷卻液之液體壓力，即產生內向之壓力；當冷卻液之液體壓力大於作用液體之液體壓力，即產生外向之壓力。A cooling chamber 13 is formed at a distance between the sleeve 21 and the fixing ring 22, a first sealing assembly and a second sealing assembly, and a cooling liquid is disposed inside the cooling chamber 13. The working liquid inside the mechanical device can be pressurized to flow into the sealing chamber 12, when the liquid pressure of the working liquid is greater than the liquid pressure of the cooling liquid, that is, the inward pressure is generated; when the liquid pressure of the cooling liquid is greater than the liquid pressure of the working liquid , that is, the pressure of extroversion.
請參閱圖3所示，當本發明之機械軸封處於內向壓力之狀態時，該內向壓力朝向第一密封環51之方向推頂該第一密封環51，並透過第一密封環51移動推頂第二間隔環53，進而推頂該第一帶動環30，推頂之壓力可在磨擦面 310及第一密封面220之間形成有一液壓作用區A，該液壓作用區A的面積為該磨擦面310及第一密封面220之接觸面積的50%~100%，藉此令該磨擦面310及第一密封面220在相對轉動時保持一定壓力相互抵頂磨擦，能夠保持磨擦面310及第一密封面220之間的密封作用，進而防止作用液體洩漏進入冷卻室13中。該單向滑動阻隔組件50中之第一密封環51由於位於液體側且位於第一帶動環30及軸套21之間，因此可防止作用液體由軸套21第一端210處進入冷卻室13中，此外，當第一帶動環30朝向大氣側位移時，該第一密封環51也會受內向壓力的影響而隨第一帶動環30朝向大氣側位移，因此該第一密封環51僅能朝向於間隔區D之方向移動，當作用液體中具有雜質且沉積在該軸套21之第一端210外壁面上時，由於第一密封環51不會朝向液體側滑動，因此不會與雜質相互接觸，而可維持其防漏之密封效果。請配合參閱圖4所示，當本發明之機械軸封處於外向壓力之狀態時，冷卻液可流入至該第一帶動環30及該軸套21之階級部23之間，冷卻液位於彈簧槽303外側處朝向大氣側方向推頂該第一帶動環30之壁面C，藉此在該磨擦面310及第一密封面220之間形成有一液壓作用區B，該液壓作用區B的面積為該磨擦面310及第一密封面220之接觸面積的50%~100%，令該磨擦面310及第一密封面220在相對轉動時相互抵頂磨擦，能夠保持磨擦面310及第一密封面220之間的密封作用，並防止冷卻液洩漏進入密封腔室12中。本發明之單向滑動阻隔組件50之第二密封環54可防止冷卻液流出冷卻室13外而流入密封腔室12中。此外，當第一帶動環30朝向大氣側位移時，由於冷卻液之壓力不會影響至該第一密封環51，因此該第一密封環51僅能朝向於間隔區D之方向移動，當作用液體中具有雜質且沉積在該軸套21之第一端210外壁面上時，由於第一密封環51不會朝向液體側滑動，因此不會與雜質相互接觸，能夠避免其與汙垢或顆粒產生磨擦及磨損，進而提供其構件可具有應有的使用壽命及防漏性能。Referring to FIG. 3, when the mechanical shaft seal of the present invention is in the state of the inward pressure, the inward pressure pushes the first seal ring 51 toward the first seal ring 51, and moves through the first seal ring 51. The second spacer ring 53 further pushes the first driving ring 30, and the pressure of the pushing can be on the rubbing surface A hydraulic working area A is formed between the 310 and the first sealing surface 220. The area of the hydraulic working area A is 50% to 100% of the contact area of the friction surface 310 and the first sealing surface 220, thereby making the friction surface The 310 and the first sealing surface 220 maintain a certain pressure against each other during relative rotation, and can maintain the sealing action between the friction surface 310 and the first sealing surface 220, thereby preventing the leakage of the working liquid into the cooling chamber 13. The first sealing ring 51 of the one-way sliding barrier assembly 50 is located on the liquid side and is located between the first driving ring 30 and the sleeve 21, thereby preventing the working liquid from entering the cooling chamber 13 from the first end 210 of the sleeve 21. In addition, when the first driving ring 30 is displaced toward the atmosphere side, the first sealing ring 51 is also affected by the inward pressure and is displaced toward the atmospheric side with the first driving ring 30, so the first sealing ring 51 can only Moving toward the direction of the spacer D, when the working liquid has impurities and is deposited on the outer wall surface of the first end 210 of the sleeve 21, since the first sealing ring 51 does not slide toward the liquid side, it does not interfere with the impurities. They are in contact with each other to maintain their leak-proof sealing effect. Referring to FIG. 4, when the mechanical shaft seal of the present invention is in an outward pressure state, the coolant can flow between the first driving ring 30 and the step portion 23 of the sleeve 21, and the coolant is located in the spring slot. The outer surface of the 303 pushes the wall surface C of the first driving ring 30 toward the atmosphere side direction, thereby forming a hydraulic action zone B between the friction surface 310 and the first sealing surface 220, and the area of the hydraulic working area B is The friction surface 310 and the first sealing surface 220 are 50% to 100% of the contact area, so that the friction surface 310 and the first sealing surface 220 are rubbed against each other during relative rotation, and the friction surface 310 and the first sealing surface 220 can be maintained. The seal between them prevents leakage of coolant into the sealed chamber 12. The second seal ring 54 of the one-way sliding barrier assembly 50 of the present invention prevents coolant from flowing out of the cooling chamber 13 into the sealed chamber 12. In addition, when the first driving ring 30 is displaced toward the atmospheric side, since the pressure of the cooling liquid does not affect the first sealing ring 51, the first sealing ring 51 can only move toward the direction of the space D, when acting When the liquid has impurities and is deposited on the outer wall surface of the first end 210 of the sleeve 21, since the first seal ring 51 does not slide toward the liquid side, it does not come into contact with impurities, and can be prevented from being generated with dirt or particles. Friction and wear, which in turn provides the components with the expected service life and leak-proof performance.
本發明當內向壓力與外向壓力交互變換時，由於該單向滑動阻隔組件50之第一密封環51及第二密封環54皆只能朝向於間隔區D之方向位移，因此仍可保有與前述之內向壓力及外向壓力狀態下相同之密封狀態。以上所述僅是本發明的較佳實施例而已，並非對本發明做任何形式上的限制，雖然本發明已以較佳實施例揭露如上，然而並非用以限定本發明，任何熟悉本專業的技術人員，在不脫離本發明技術方案的範圍內，當可利用上述揭示的技術內容作出些許更動或修飾為等同變化的等效實施例，但凡是未脫離本發明技術方案的內容，依據本發明的技術實質對以上實施例所作的任何簡單修改、等同變化與修飾，均仍屬於本發明技術方案的範圍內。In the present invention, when the inward pressure and the outward pressure are alternately changed, since the first seal ring 51 and the second seal ring 54 of the one-way sliding barrier assembly 50 can only be displaced toward the direction of the space D, the present invention can still be retained. The same sealing state in the inward pressure and the outward pressure state. The above is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Although the present invention has been disclosed in the above preferred embodiments, it is not intended to limit the present invention. A person skilled in the art can make some modifications or modifications to equivalent embodiments by using the above-disclosed technical contents without departing from the technical scope of the present invention. It is still within the scope of the technical solution of the present invention to make any simple modifications, equivalent changes and modifications to the above embodiments.
10．．．旋轉軸10. . . Rotary axis
11．．．固定殼體11. . . Fixed housing
12．．．密封腔室12. . . Sealed chamber
13．．．冷卻室13. . . Cooling room
20．．．軸封座20. . . Shaft seal
21．．．軸套twenty one. . . Bushing
210．．．第一端210. . . First end
211．．．第二端211. . . Second end
22．．．固定環twenty two. . . M
220．．．第一密封面220. . . First sealing surface
221．．．第二密封面221. . . Second sealing surface
23．．．階級部twenty three. . . Class department
230．．．外環槽230. . . Outer ring groove
231．．．突緣231. . . Flange
232．．．平衡孔232. . . Balance hole
233．．．內環槽233. . . Inner ring groove
234．．．O型環234. . . O-ring
30．．．第一帶動環30. . . First driving ring
300．．．第一環壁300. . . First ring wall
301．．．卡止階級301. . . Killing class
302．．．第二環壁302. . . Second ring wall
303．．．彈簧槽303. . . Spring slot
304．．．銷槽304. . . Pin slot
305．．．扣環305. . . Buckle
31．．．第一迴轉環31. . . First slewing ring
310．．．磨擦面310. . . Friction surface
32．．．驅動銷32. . . Drive pin
33．．．彈簧33. . . spring
40．．．第二迴轉環40. . . Second slewing ring
400．．．磨擦面400. . . Friction surface
41．．．第二帶動環41. . . Second driving ring
410．．．彈簧槽410. . . Spring slot
42．．．彈簧42. . . spring
43．．．驅動銷43. . . Drive pin
50．．．單向滑動阻隔組件50. . . One-way sliding barrier assembly
51．．．第一密封環51. . . First seal ring
52．．．第一間隔環52. . . First spacer ring
53．．．第二間隔環53. . . Second spacer ring
54．．．第二密封環54. . . Second seal ring
Claims (6)
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| JP6469549B2 (en) * | 2014-09-29 | 2019-02-13 | 株式会社神戸製鋼所 | Oil-free screw compressor |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWM332762U (en) * | 2007-10-11 | 2008-05-21 | Scenic Precise Element Inc | A cooling fluid guiding device for shaft sealing apparatus |
| TW200949107A (en) * | 2008-05-20 | 2009-12-01 | Scenic Precise Element Inc | Shaft-sealing device |
| CN102112785A (en) * | 2009-09-24 | 2011-06-29 | 伊格尔工业股份有限公司 | Mechanical seal |
| CN102840330A (en) * | 2012-09-19 | 2012-12-26 | 江苏华青流体科技有限公司 | Front shaft seal device with integral movable ring |
-
2013
- 2013-02-08 TW TW102105088A patent/TWI494509B/en not_active IP Right Cessation
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWM332762U (en) * | 2007-10-11 | 2008-05-21 | Scenic Precise Element Inc | A cooling fluid guiding device for shaft sealing apparatus |
| TW200949107A (en) * | 2008-05-20 | 2009-12-01 | Scenic Precise Element Inc | Shaft-sealing device |
| CN102112785A (en) * | 2009-09-24 | 2011-06-29 | 伊格尔工业股份有限公司 | Mechanical seal |
| CN102840330A (en) * | 2012-09-19 | 2012-12-26 | 江苏华青流体科技有限公司 | Front shaft seal device with integral movable ring |
Also Published As
| Publication number | Publication date |
|---|---|
| TW201432149A (en) | 2014-08-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MM4A | Annulment or lapse of patent due to non-payment of fees |