WO2021218922A1 - 一种旋转密封结构及螺旋式砂水分离机 - Google Patents

一种旋转密封结构及螺旋式砂水分离机 Download PDF

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Publication number
WO2021218922A1
WO2021218922A1 PCT/CN2021/089947 CN2021089947W WO2021218922A1 WO 2021218922 A1 WO2021218922 A1 WO 2021218922A1 CN 2021089947 W CN2021089947 W CN 2021089947W WO 2021218922 A1 WO2021218922 A1 WO 2021218922A1
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Prior art keywords
sleeve
sealing
ring
section
oil
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PCT/CN2021/089947
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English (en)
French (fr)
Inventor
冯振童
丁顺古
洪明建
陈少煌
谢智聪
Original Assignee
福建南方路面机械股份有限公司
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Publication of WO2021218922A1 publication Critical patent/WO2021218922A1/zh

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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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
    • B03B5/00—Washing granular, powdered or lumpy materials; Wet separating
    • B03B5/48—Washing granular, powdered or lumpy materials; Wet separating by mechanical classifiers
    • B03B5/52—Spiral classifiers
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C3/00—Shafts; Axles; Cranks; Eccentrics
    • F16C3/02—Shafts; Axles
    • F16C3/023—Shafts; Axles made of several parts, e.g. by welding
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
    • F16C35/08—Rigid support of bearing units; Housings, e.g. caps, covers for spindles
    • F16C35/12—Rigid support of bearing units; Housings, e.g. caps, covers for spindles with ball or roller bearings
    • 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
    • F16J15/162—Special parts or details relating to lubrication or cooling of the sealing itself
    • 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
    • F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
    • F16J15/3204—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip
    • F16J15/3232—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip having two or more lips
    • 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
    • F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
    • F16J15/324—Arrangements for lubrication or cooling of the sealing itself
    • 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
    • F16N—LUBRICATING
    • F16N1/00—Constructional modifications of parts of machines or apparatus for the purpose of lubrication

Definitions

  • the invention relates to the technical field of a spiral sand-water separator, in particular to a rotary seal structure and a spiral sand-water separator.
  • the sand-gravel separator is the core equipment of the concrete recycling system.
  • the screw shaft of the spiral sand-water separator needs to be installed obliquely upwards.
  • the shaft end device supported and fixed at the tail of the screw shaft is inevitably immersed in sand water, so this component requires sealing Higher.
  • the Chinese Patent Authorized Announcement Number CN207951703U discloses a water-sealed structure for a spiral sand washing machine. Its sealing effect is not satisfactory and has the following shortcomings:
  • outer connecting sleeve is only provided with an outer connecting sleeve flange at the right end, and the entire inner wall of the outer connecting sleeve is a sealing surface or a mating surface, so that the outer connecting sleeve needs to be processed with a deep depth, which is difficult to process, and bearing installation and disassembly All difficult
  • the present invention provides a rotary sealing structure with long life, easy maintenance, low cost, and good sealing performance and a spiral sand-water separator.
  • a rotary seal structure which is characterized by: comprising a rotating sleeve, a fixed core shaft, a spiral blade shaft, a sealing ring, a thrust ball bearing, a spherical roller bearing, and a separating shaft
  • the screw blade shaft is locked and connected with the rotating sleeve by bolts
  • the fixed mandrel includes a fixed section, a sealing section, and a rotating shaft section.
  • the fixed section is fixedly arranged, and the sealing section and the rotating shaft section are rotatable and closed.
  • the rotating sleeve includes an annular end cover, a sealing sleeve, a rotating shaft sleeve, and a closed end cover that are detachably connected by bolts in turn, the sealing ring is arranged on the sealing section, and the shaft diameter of the sealing section is larger than the fixed section Compared with the shaft diameter of the rotating shaft section, the sealing section forms an oblique shoulder surface facing the fixed section and a straight shoulder surface facing the rotating shaft section.
  • the annular end cover is sleeved on the fixed section, and the annular end cover faces the sealing section One side forms an inclined end surface that matches with the inclined shaft shoulder surface.
  • a polyurethane sealing ring is arranged between the annular end cover and the sealing sleeve.
  • the annular end cover and the sealing sleeve are locked so that the polyurethane sealing ring is pressed against the inclined shaft shoulder surface.
  • the sleeve is equipped with a thrust ball bearing, a separating shaft sleeve, and a spherical roller bearing.
  • the separating shaft sleeve is arranged between the thrust ball bearing and the spherical roller bearing.
  • the closed end cover and the rotating shaft sleeve are locked to squeeze the thrust ball bearing. , In order to position the thrust ball bearing, the spacer sleeve, and the spherical roller bearing on the shaft section.
  • the sealing section is provided with a number of seal ring grooves and a number of oil ring grooves, the seal ring grooves are arranged adjacent to the oil ring grooves, and each of the seal ring grooves and the oil ring grooves are arranged in a spaced arrangement.
  • the seal ring includes a plurality of slip ring type combined seals, and the slip ring type combined seals are arranged in the seal ring groove.
  • a reduced diameter part is formed at one end of the sealing section close to the straight shaft shoulder surface
  • the seal ring includes a plurality of skeleton oil seals, the skeleton oil seals are arranged on the reduced diameter part, and the lip of each skeleton oil seal faces the direction of the rotating shaft section.
  • one end of the sealing sleeve is provided with a flange for connecting with the annular end cover, and the flange is displaced from the end of the sealing sleeve, so that the flange, the polyurethane sealing ring, the end surface of the sealing sleeve, and the sealing section are formed.
  • a first oil passage is provided in the fixed mandrel, and the first oil passage is connected to the first oil storage cavity.
  • sealing sleeve is provided with an inclined surface facing the direction of the seal ring groove on the inner side of one end of the first oil storage cavity, and the first oil passage is connected to the first oil storage cavity at the inclined surface.
  • a second oil storage cavity is formed between the thrust ball bearing, the separating bushing, the spherical roller bearing, and the rotating shaft bushing, the separating bushing is provided with an internally and externally connected oil guide channel, and the fixed mandrel is provided with a second oil storage cavity.
  • An oil passage, and the second oil passage is connected to the second oil storage cavity through an oil guide passage.
  • a groove is formed in the closed end cover toward one end of the fixed section, a third oil storage cavity is formed between the groove, the thrust ball bearing, and the fixed section, and a second oil passage is provided in the fixed mandrel. The second oil passage is connected to the third oil storage cavity.
  • a first oil passage and a second oil passage are provided in the fixed mandrel, and the first oil passage and the second oil passage are independently arranged without intersection, and the first oil passage passes through the first oil passage.
  • the oil nipple enters oil
  • the second oil passage channel enters the oil through the second oil nipple.
  • the thrust ball bearing includes a first seat ring, a second seat ring, and rollers.
  • the closed end cover and the rotating shaft sleeve are locked to press the first seat ring laterally, and there is a gap between the first seat ring and the rotating shaft section.
  • the second seat ring is in contact with the shaft section and there is a gap between the second seat ring and the shaft sleeve.
  • the spherical roller bearing includes an outer ring, an inner ring, and double row rollers. The outer ring is in contact with the shaft sleeve and the inner ring is in contact with the shaft section. Connected, and the straight shaft shoulder surfaces on both sides of the inner ring are opposed to the separating shaft sleeve.
  • a spiral sand-water separator characterized in that it comprises any one of the above-mentioned rotary seal structures.
  • the present invention provides a rotary seal structure and spiral sand-water separator, which adopts a combination of thrust ball bearings and spherical roller bearings to rotate from two dimensions.
  • the support has the effect of mutual cooperation and mutual protection, which increases the service life of the bearing;
  • the rotating sleeve is detachably connected by multiple parts, which reduces the production cost, and is more conducive to installation and replacement of parts, with low maintenance costs; adopts three seals And two independent oil passages ensure the sealing effect; the design of the oblique shaft shoulder on one side of the sealing section of the present invention effectively improves the sealing effect.
  • Figure 1 is a schematic cross-sectional view of a rotary seal structure of the present invention.
  • Figure 2 is a schematic diagram of the fixed mandrel structure of the present invention.
  • Fig. 3 is a partial enlarged view 1 of Fig. 1 of the present invention.
  • Fig. 4 is a partial enlarged view 2 of Fig. 1 of the present invention.
  • Skeleton oil seal 5. Thrust ball bearing, 51. First seat ring, 52. Second seat ring, 53. Roller, 6. Spherical roller bearing, 61 . Outer ring, 62. Inner ring, 63. Double row rollers, 7. Separating sleeve, 71. Oil guide channel.
  • a rotary seal structure includes a rotating sleeve 1, a fixed core shaft 2, a spiral blade shaft 3, a seal ring 4, a thrust ball bearing 5, a spherical roller bearing 6, a spacer sleeve 7 .
  • the screw blade shaft 3 is locked and connected to the rotating sleeve 1 by bolts.
  • the fixed mandrel 2 includes a fixed section 21, a sealing section 22, and a rotating shaft section 23.
  • the fixed section 21 is fixedly arranged to support the entire sealing device to ensure that the sealing section 22 and the rotating shaft section 23 are incompatible.
  • Rotating and sealing is arranged in the rotating sleeve 1;
  • the rotating sleeve 1 includes an annular end cover 11, a sealing sleeve 12, a rotating shaft sleeve 13, and a closed end cover 14 that are detachably connected by bolts;
  • the shaft diameter of the sealing section 22 is larger than the fixed section 21 Compared with the shaft diameter of the shaft section 23, the sealing section 22 forms an oblique shoulder surface 221 toward the side of the fixed section 21, and a straight shoulder surface 222 toward the side of the shaft section 23.
  • the ring-shaped end cover 11 is sleeved on the fixed section 21 in an annular
  • the side of the end cover 11 facing the sealing section 22 forms an inclined end surface 111 that is matched with the oblique shaft shoulder surface 221.
  • a polyurethane sealing ring 15 is arranged between the annular end cover 11 and the sealing sleeve 12, and the annular end cover 11 and the sealing sleeve 12 are locked to make the polyurethane
  • the sealing ring 15 is pressed against the inclined shaft shoulder surface 221.
  • the sealing ring 4 includes a number of slip ring type combined seals 41 and a number of skeleton oil seals 42.
  • the sealing section 22 is provided with a number of sealing ring grooves 223 and a number of oil ring grooves 224 for sealing.
  • the ring groove 223 is arranged adjacent to the oil ring groove 224, and the seal ring grooves 223 and the oil ring grooves 224 are arranged at intervals.
  • the slip ring type combined seal 41 is arranged in the seal ring groove 223; the seal section 22 is close to the straight shaft A reduced diameter part 225 is formed at one end of the shoulder surface 222, the skeleton oil seal 42 is provided on the reduced diameter part 225, and the lip of each skeleton oil seal 42 faces the direction of the shaft section 23.
  • the shaft section 23 is sleeved with a thrust ball bearing 5, a separating sleeve 7, and a spherical roller bearing 6.
  • the separating sleeve 7 is arranged between the thrust ball bearing 2 and the spherical roller bearing 6, and the thrust ball bearing 5 includes the first
  • the first seat ring 51, the second seat ring 52, the roller 53, the closed end cover 14 and the rotating shaft sleeve 13 are locked to press the first seat ring 51 laterally.
  • the second seat ring 52 is in contact with the shaft section 23 and there is a gap between the second seat ring 52 and the shaft sleeve 13.
  • the spherical roller bearing 6 includes an outer ring 61, an inner ring 62, and double row rollers 63.
  • the outer ring 61 and the shaft The sleeve 13 is in contact and connected, the inner ring 62 is in contact with the shaft section 23, and the straight shoulder surfaces 222 on both sides of the inner ring 62 abut against the separating shaft sleeve 7, the closed end cover 14 and the shaft sleeve 13 are locked against the thrust ball bearing 5 Press to position the thrust ball bearing 5, the spacer sleeve 7, and the spherical roller bearing 6 on the shaft section 23.
  • One end of the sealing sleeve 12 is provided with a flange 121 for connecting with the annular end cover.
  • the flange 121 protrudes from the end of the sealing sleeve 12 in a dislocation, so that the flange 121, the polyurethane sealing ring 15, the end face of the sealing sleeve 12, and the sealing section
  • a first oil storage cavity is formed between 22, and the sealing sleeve 12 is provided with an inclined surface 122 facing the sealing ring groove 223 on the inner side of one end of the first oil storage cavity.
  • a second oil storage cavity is formed between the thrust ball bearing 5, the separating shaft sleeve 7, the spherical roller bearing 6, and the rotating shaft sleeve 13, and the separating shaft sleeve 7 is provided with an oil guide passage 71 that communicates with the inside and outside; the closed end cover 14 faces fixed
  • a groove 141 is formed at one end of the section 21, and a third oil storage cavity is formed between the groove 141, the thrust ball bearing 5 and the fixed section 21.
  • the fixed mandrel 2 is provided with a first oil passage 24 and a second oil passage 25.
  • the first oil passage 24 and the second oil passage 25 are independently arranged without intersection, and the first oil passage 24 passes through the first oil nozzle 26 enters oil, the second oil passage 25 enters the oil through the second nozzle 27, the first oil passage 24 is connected to the first oil storage cavity at the inclined surface 122, and the second oil passage 25 passes through the oil guide passage 71 It is connected to the second oil storage cavity, and the second oil passage 25 is connected to the third oil storage cavity.
  • the sealing section 22 is provided with two raised oil ring grooves 224, and a seal ring groove 223 is formed between the two oil ring grooves 224; the slip ring type combined seal 41 is provided in the seal ring groove 223; the end of the sealing section 22 close to the straight shoulder surface 222 is formed with a reduced diameter portion 225, the skeleton oil seal 42 is provided on the reduced diameter portion 225, and the lip of each skeleton oil seal 42 faces the direction of the shaft section 23.
  • a spiral sand-water separator includes the aforementioned rotary sealing structure.
  • the rotary sealing structure is at the low end of the inclined spiral blade shaft 3 and below the liquid level.
  • the rotary sleeve 1 connects the sealing section 22, the rotating shaft section 23, the sealing ring 4, and the thrust ball bearing 5.
  • Spherical roller bearing 6, separation sleeve 7 and other rotating parts are enclosed inside, so that it is completely isolated from the sand-water mixture to protect the rotating and sealing parts; because the spiral blade shaft 3 is inclined, the spiral blade shaft 3 It is necessary to withstand the axial component force of the equipment's own weight and the axial component force of the lifting material resistance.
  • the combination of thrust ball bearing 5 and spherical roller bearing 6 is adopted.
  • Thrust ball bearing 5 can offset the above-mentioned axial component force and avoid The influence of the axial component force on the spherical roller bearing 6 is ensured to ensure that the working clearance of the spherical roller bearing 6 is controllable to prevent being held up.
  • the selection of the spherical roller bearing 6 can reduce the concentricity of the equipment Requirements, it is easier to meet processing requirements and reduce processing costs; the thrust ball bearing 5 and the spherical roller bearing 6 are supported in rotation from two dimensions, playing a role of mutual cooperation and mutual protection, and improving the service life of the bearing. The first point of the prior art is solved.
  • the annular end cover 11, the sealing sleeve 12, the rotating shaft sleeve 13, and the closed end cover 14 of the rotating sleeve 1 are detachably connected by bolts, which greatly reduces the processing cost of the rotating sleeve 1.
  • the thrust ball bearing 5, The spherical roller bearing 6 is not blocked by the sealing sleeve 12, which solves the deficiencies of the prior art (2).
  • the annular end cover 11 presses the polyurethane seal ring 15 on the oblique shaft shoulder surface 221 to form a first seal.
  • the multi-channel seal ring groove 223 and the slip ring combined seal 41 provided therein form a second seal, and the reduced diameter portion
  • the multiple skeleton oil seals 42 set on the 225 form a third seal, which fully ensures that the thrust ball bearing 5 and the spherical roller bearing 6 on the shaft section 23 are not in contact with the external sand and water under the three seals; the first oil storage
  • the cavity, the second oil storage cavity, the third oil storage cavity, and the oil storage ring groove 224 can store a certain amount of grease to ensure the lubrication effect of the seal ring 4, the thrust ball bearing 5, and the spherical roller bearing 6, which further increases Service life; solves the 3 shortcomings of the prior art.
  • the first oil passage 24 and the second oil passage 25 of the fixed mandrel 2 are independently arranged without intersection, and the oil is injected through the first oil nozzle 26 and the second oil nozzle 27 respectively, even if the polyurethane seal ring 15 is worn to the full Damage, causing sand and water to invade the first oil passage 24, and will not affect the second oil passage 25; the polyurethane sealing ring 15 is tightly attached to the oblique shaft shoulder surface 221 by the annular end cover 11, and the polyurethane sealing ring 15 itself has certain elasticity And self-lubricating function, so it can compensate for the wear of the polyurethane sealing ring 15 and the slight deformation caused by the change of working load at any time to ensure its sealing performance.
  • the annular end cover 11 and the sealing sleeve 12 are detachably connected, so the polyurethane sealing ring 15 can be replaced only by disassembling the annular end cover 11, without affecting the sealing parts and bearing parts behind, and the replacement is convenient.
  • the fourth point of the prior art is solved.
  • the invention relates to a rotary sealing structure and a spiral sand-water separator.
  • the rotary sealing structure includes a rotary sleeve, a fixed mandrel, a spiral blade shaft, a sealing ring, a thrust ball bearing, a spherical roller bearing, a separating shaft sleeve, and a fixed shaft sleeve.
  • the mandrel includes a fixed section, a sealing section, and a rotating shaft section.
  • the rotating sleeve includes a detachable connection ring end cover, a sealing sleeve, a rotating shaft sleeve, and a closed end cover.
  • the ring end cover is sleeved on the fixed section, and the ring end cover is locked with the sealing sleeve. Tighten the polyurethane seal ring on the oblique shaft shoulder surface.
  • the shaft section is sleeved with thrust ball bearings, spacer sleeves, and spherical roller bearings. The closed end cover and the shaft sleeve are locked to squeeze the thrust ball bearings to Position the thrust ball bearing, the spacer sleeve, and the spherical roller bearing on the shaft section.
  • the invention forms a three-level seal, the equipment has long service life, low maintenance cost, wide application range, and good industrial practicability.

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  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Rolling Contact Bearings (AREA)

Abstract

一种旋转密封结构及螺旋式砂水分离机被公开。该旋转密封结构包括旋转套（1）、固定芯轴（2）、螺旋叶片轴（3）、密封环（4）、推力球轴承（5）、调心滚子轴承（6）、分隔轴套（7），固定芯轴（2）包括固定段（21）、密封段（22）、转轴段（23），旋转套（1）包括可拆卸连接的环形端盖（11）、密封套（12）、转轴套（13）、封闭端盖（14），环形端盖（11）套设于固定段（21）上，环形端盖（11）与密封套（12）锁紧使聚氨酯密封环（15）压紧于斜轴肩面（221）上，转轴段（23）上套设有推力球轴承（5）、分隔轴套（7）、调心滚子轴承（6），封闭端盖（14）与转轴套（13）锁紧对推力球轴承（5）挤压，以将推力球轴承（5）、分隔轴套（7）、调心滚子轴承（6）定位于转轴段（23）上。该设备使用寿命长，维护成本低。

Description

一种旋转密封结构及螺旋式砂水分离机 技术领域
本发明涉及螺旋式砂水分离机技术领域，特别涉及一种旋转密封结构及螺旋式砂水分离机。
背景技术
砂石分离机是混凝土回收系统的核心设备，螺旋式砂水分离机的螺旋轴需要倾斜向上安装，螺旋轴尾部支撑固定的轴端装置等就不可避免浸泡在砂水中，因此该部件对密封要求较高。授权公告号为CN207951703U的中国专利公开了一种螺旋洗砂机用水密封结构，其密封效果不够理想，存在以下不足：
①深沟球轴承和圆锥滚子轴承组合设计支撑主体，由于螺旋轴是倾斜向上安装，螺旋轴自重的轴向分力、提升物料阻力的轴向分力等轴向力只能由圆锥滚子轴承来分担，工作过程中产生的阻力是随机变化的，而导致圆锥滚子轴承要求的工作间隙不可控，容易憋住，影响正常使用；
②外连接套只在右端设置一个外连接套法兰，而整个外连接套内壁都是密封面或者配合面，以至于外连接套需要精加工深度很深，加工难度较大，轴承安装和拆卸都困难；
③选用的骨架油封和L型组合密封圈是用于芯轴旋转而腔体固定的结构，而此结构是外连接套旋转而芯轴固定的结构，将此种架油封 和L型组合密封圈用在该结构上，运行过程中就很快就被损坏掉，失去密封功能；
④所有的密封件和轴承都只是通过同一个油道加油，最左端的第二密封环一旦磨损破坏，砂、粉料、水混合污染物就会通过此处的导油孔进入油道从而到达第一道密封处和深沟球轴承、圆锥滚子轴承处，致使第一道密封和轴承迅速磨损破坏，且如果更换第二密封环，必须拆卸整个水密封结构，更换磨损的第二密封环困难重重。
发明内容
为克服现有技术中的不足，本发明提供一种寿命长、易维护、成本低、密封性好的旋转密封结构及螺旋式砂水分离机。
为实现上述目的，本发明采用的技术方案如下：一种旋转密封结构，其特征在于：包括旋转套、固定芯轴、螺旋叶片轴、密封环、推力球轴承、调心滚子轴承、分隔轴套，所述螺旋叶片轴通过螺栓与旋转套锁紧连接，所述固定芯轴包括固定段、密封段、转轴段，所述固定段固定设置，所述密封段与转轴段可旋转且封闭的设于旋转套内，所述旋转套包括依次通过螺栓可拆卸连接的环形端盖、密封套、转轴套、封闭端盖，所述密封环设于密封段上，密封段的轴径大于固定段与转轴段的轴径，密封段朝向固定段一侧形成斜轴肩面、朝向转轴段一侧形成直轴肩面，所述环形端盖套设于固定段上，环形端盖朝向密封段的一面形成与斜轴肩面配合的倾斜端面，环形端盖与密封套间设有聚氨酯密封环，环形端盖与密封套锁紧使聚氨酯密封环压紧于斜轴 肩面上，所述转轴段上套设有推力球轴承、分隔轴套、调心滚子轴承，所述分隔轴套设于推力球轴承与调心滚子轴承之间，封闭端盖与转轴套锁紧对推力球轴承挤压，以将推力球轴承、分隔轴套、调心滚子轴承定位于转轴段上。
进一步的，密封段上开设有若干密封环槽、若干存油环槽，所述密封环槽与存油环槽相邻布置，且各密封环槽与各存油环槽间隔排列设置，所述密封环包括若干滑环式组合密封，所述滑环式组合密封设于密封环槽内。
进一步的，密封段靠近直轴肩面的一端形成有缩径部，所述密封环包括若干骨架油封，所述骨架油封设于缩径部上，各骨架油封的唇口朝向转轴段方向。
进一步的，密封套一端设有用于与环形端盖连接的法兰盘，所述法兰盘错位凸出于密封套端部，使法兰盘、聚氨酯密封环、密封套端面、密封段间形成第一储油腔，所述固定芯轴内设有第一油路通道，所述第一油路通道连通至第一储油腔内。
进一步的，密封套位于第一储油腔一端的内侧开设有朝向密封环槽方向的倾斜面，所述第一油路通道连通至倾斜面处的第一储油腔。
进一步的，推力球轴承、分隔轴套、调心滚子轴承、转轴套间形成有第二储油腔，所述分隔轴套上设有内外连通的导油通道，固定芯轴内设有第二油路通道，所述第二油路通道通过导油通道连通至第二储油腔内。
进一步的，封闭端盖朝向固定段的一端形成有凹槽，所述凹槽、 推力球轴承、固定段间形成第三储油腔，固定芯轴内设有第二油路通道，所述第二油路通道连通至第三储油腔内。
进一步的，固定芯轴内设有第一油路通道、第二油路通道，所述第一油路通道与第二油路通道无交汇的独立设置，所述第一油路通道通过第一油嘴进油，所述第二油路通道通过第二油嘴进油。
进一步的，推力球轴承包括第一座圈、第二座圈、滚子，封闭端盖与转轴套锁紧对第一座圈侧向挤压，第一座圈与转轴段间具有间隙，第二座圈与转轴段接触连接且第二座圈与转轴套间具有间隙，调心滚子轴承包括外圈、内圈、双列滚子，外圈与转轴套接触连接，内圈与转轴段接触连接，且内圈两侧分别直轴肩面与分隔轴套相抵。
一种螺旋式砂水分离机，其特征在于：包括上述任意一项所述一种旋转密封结构。
由上述对本发明的描述可知，与现有技术相比，本发明提供的一种旋转密封结构及螺旋式砂水分离机，采用推力球轴承、调心滚子轴承组合，从两个维度进行旋转支撑，起到了相互配合相互保护的效果，增加了轴承的使用寿命；旋转套由多部件可拆卸连接，降低了生产成本，且更有利于安装、更换零部件，维护成本低；采用三道密封及两条独立油路通道，保证了密封效果；本发明密封段一侧斜轴肩面设计有效的提高了密封效果。
附图说明
图1为本发明一种旋转密封结构剖视示意图。
图2为本发明固定芯轴结构示意图。
图3为本发明图1局部放大图一。
图4为本发明图1局部放大图二。
图中标识对应如下：1.旋转套、11.环形端盖、111.倾斜端面、12.密封套、121.法兰盘、122.倾斜面、13.转轴套、14.封闭端盖、141.凹槽、15.聚氨酯密封环、2.固定芯轴、21.固定段、22.密封段、221.斜轴肩面、222.直轴肩面、223.密封环槽、224.存油环槽、225.缩径部、23.转轴段、24.第一油路通道、25.第二油路通道、26.第一油嘴、27.第二油嘴、3.螺旋叶片轴、4.密封环、41.滑环式组合密封、42.骨架油封、5.推力球轴承、51.第一座圈、52.第二座圈、53.滚子、6.调心滚子轴承、61.外圈、62.内圈、63.双列滚子、7.分隔轴套、71.导油通道。
具体实施方式
以下通过具体实施方式对本发明作进一步的描述。
参照图1至图4所示，一种旋转密封结构，包括旋转套1、固定芯轴2、螺旋叶片轴3、密封环4、推力球轴承5、调心滚子轴承6、分隔轴套7。
螺旋叶片轴3通过螺栓与旋转套1锁紧连接，固定芯轴2包括固定段21、密封段22、转轴段23，固定段21固定设置支撑整个密封装置，保证密封段22与转轴段23不可旋转且封闭的设于旋转套1内；旋转套1包 括依次通过螺栓可拆卸连接的环形端盖11、密封套12、转轴套13、封闭端盖14；密封段22的轴径大于固定段21与转轴段23的轴径，密封段22朝向固定段21一侧形成斜轴肩面221、朝向转轴段23一侧形成直轴肩面222，环形端盖11套设于固定段21上，环形端盖11朝向密封段22的一面形成与斜轴肩面221配合的倾斜端面111，环形端盖11与密封套12间设有聚氨酯密封环15，环形端盖11与密封套12锁紧使聚氨酯密封环15压紧于斜轴肩面221上，密封环4包括若干滑环式组合密封41、若干骨架油封42，密封段22上开设有若干密封环槽223、若干存油环槽224，密封环槽223与存油环槽224相邻布置，且各密封环槽223与各存油环槽224间隔排列设置，滑环式组合密封41设于密封环槽223内；密封段22靠近直轴肩面222的一端形成有缩径部225，骨架油封42设于缩径部225上，各骨架油封42的唇口朝向转轴段23方向。
转轴段23上套设有推力球轴承5、分隔轴套7、调心滚子轴承6，分隔轴套7设于推力球轴承2与调心滚子轴承6之间，推力球轴承5包括第一座圈51、第二座圈52、滚子53，封闭端盖14与转轴套13锁紧对第一座圈51侧向挤压，第一座圈51与转轴段23间具有间隙，第二座圈52与转轴段23接触连接且第二座圈52与转轴套13间具有间隙，调心滚子轴承6包括外圈61、内圈62、双列滚子63，外圈61与转轴套13接触连接，内圈62与转轴段23接触连接，且内圈62两侧分别直轴肩面222与分隔轴套7相抵，封闭端盖14与转轴套13锁紧对推力球轴承5挤压，以将推力球轴承5、分隔轴套7、调心滚子轴承6定位于转轴段23上。
密封套12一端设有用于与环形端盖连接的法兰盘121，法兰盘121 错位凸出于密封套12端部，使法兰盘121、聚氨酯密封环15、密封套12端面、密封段22间形成第一储油腔，密封套12位于第一储油腔一端的内侧开设有朝向密封环槽223方向的倾斜面122。推力球轴承5、分隔轴套7、调心滚子轴承6、转轴套13间形成有第二储油腔，分隔轴套7上设有内外连通的导油通道71；封闭端盖14朝向固定段21的一端形成有凹槽141，凹槽141、推力球轴承5、固定段21间形成第三储油腔。固定芯轴2内设有第一油路通道24、第二油路通道25，第一油路通道24与第二油路通道25无交汇的独立设置，第一油路通道24通过第一油嘴26进油，第二油路通道25通过第二油嘴27进油，第一油路通道24连通至倾斜面122处的第一储油腔内，第二油路通25道通过导油通道71连通至第二储油腔内，第二油路通道25连通至第三储油腔内。
一个实施例中，所述密封段22上设有两个凸起的存油环槽224，两个存油环槽224之间形成密封环槽223；滑环式组合密封41设于密封环槽223内；密封段22靠近直轴肩面222的一端形成有缩径部225，骨架油封42设于缩径部225上，各骨架油封42的唇口朝向转轴段23方向。
一种螺旋式砂水分离机，包括前述一种旋转密封结构。
该种螺旋密封结构工作原理如下：
在螺旋式砂水分离机中，该旋转密封结构处于倾斜的螺旋叶片轴3的低位端，并处于液面以下，旋转套1将密封段22、转轴段23和密封环4、推力球轴承5、调心滚子轴承6、分隔轴套7等转动部件封闭于内，使其与砂水混合液完全隔离，保护转动、密封部件；由于螺旋叶片轴3 倾斜设置，因此工作时，螺旋叶片轴3需要承受到设备自重的轴向分力、提升物料阻力的轴向分力，采用推力球轴承5和调心滚子轴承6组合设置，其中推力球轴承5可抵消上述轴向分力，避免了轴向分力对调心滚子轴承6的影响，保证调心滚子轴承6的工作间隙是可控的，防止被憋住，同时，选用调心滚子轴承6可降低设备的同轴度要求，更容易满足加工要求，降低加工成本；推力球轴承5和调心滚子轴承6从两个方向维度上进行旋转支撑，起到了相互配合、相互保护的作用，提高了轴承使用寿命。解决了现有技术的第①点不足。
旋转套1的环形端盖11、密封套12、转轴套13、封闭端盖14之间通过螺栓可拆卸连接的，大大降低了旋转套1的加工成本，可在安装与调整推力球轴承5、调心滚子轴承6不被密封套12阻挡影响，解决了现有技术的第②点不足。
环形端盖11将聚氨酯密封环15压紧于斜轴肩面221上形成第一道密封，多道密封环槽223及其内设置的滑环式组合密封41形成第二道密封，缩径部225上设置的多个骨架油封42形成第三道密封，在三道密封下充分保证了转轴段23上的推力球轴承5、调心滚子轴承6不与外界砂水接触；第一储油腔、第二储油腔、第三储油腔、存油环槽224可存储一定量的润滑脂保证了密封环4、推力球轴承5、调心滚子轴承6的润滑效果，进一步增加了使用寿命；解决了现有技术的第③点不足。
固定芯轴2的第一油路通道24与第二油路通25道无交汇的独立设置，并分别通过第一油嘴进26、第二油嘴27进油，即使聚氨酯密封环15被磨损至完全损坏，导致砂水侵入第一油路通道24，也不会影响第 二油路通道25；聚氨酯密封环15被环形端盖11紧贴于斜轴肩面221，聚氨酯密封环15本身具有一定弹性和自润滑功能，因此可随时补偿聚氨酯密封环15的磨损、及工作荷载变化产生的微量形变，保证其密封性。环形端盖11与密封套12间可拆卸连接，因此只需将环形端盖11拆卸即可更换聚氨酯密封环15，不影响后面密封部件与轴承部件，更换便捷。解决了现有技术的第④点不足。
上述仅为本发明的一种具体实施方式，但本发明的设计构思并不局限于此，凡利用此构思对本发明进行非实质性的改动，均应属于侵犯本发明保护范围的行为。
工业实用型
本发明一种旋转密封结构及螺旋式砂水分离机，其旋转密封结构，包括旋转套、固定芯轴、螺旋叶片轴、密封环、推力球轴承、调心滚子轴承、分隔轴套，固定芯轴包括固定段、密封段、转轴段，旋转套包括可拆卸连接的环形端盖、密封套、转轴套、封闭端盖，环形端盖套设于固定段上，环形端盖与密封套锁紧使聚氨酯密封环压紧于斜轴肩面上，转轴段上套设有推力球轴承、分隔轴套、调心滚子轴承，封闭端盖与转轴套锁紧对推力球轴承挤压，以将推力球轴承、分隔轴套、调心滚子轴承定位于转轴段上。本发明形成三级密封，该设备使用寿命长，维护成本低，应用范围广，具有良好的工业实用性。

Claims (11)

  1. 一种旋转密封结构，其特征在于：包括旋转套、固定芯轴、螺旋叶片轴、密封环、推力球轴承、调心滚子轴承和分隔轴套；所述螺旋叶片轴通过螺栓与旋转套锁紧连接；所述固定芯轴包括固定段、密封段、转轴段，所述固定段固定设置，限定所述密封段与转轴段不可旋转且封闭的设于旋转套内；所述旋转套包括依次通过螺栓可拆卸连接的环形端盖、密封套、转轴套和封闭端盖，所述密封环设于密封段上，密封段的轴径大于固定段与转轴段的轴径；密封段朝向固定段一侧形成斜轴肩面、朝向转轴段一侧形成直轴肩面，所述环形端盖套设于固定段上，环形端盖朝向密封段的一面形成与斜轴肩面配合的倾斜端面，环形端盖与密封套间设有聚氨酯密封环，环形端盖与密封套锁紧使聚氨酯密封环压紧于斜轴肩面上；所述转轴段上套设有推力球轴承、分隔轴套、调心滚子轴承，所述分隔轴套设于推力球轴承与调心滚子轴承之间，封闭端盖与转轴套锁紧对推力球轴承挤压，以将推力球轴承、分隔轴套、调心滚子轴承定位于转轴段上。
  2. 根据权利要求1所述一种旋转密封结构，其特征在于：所述密封段上开设有若干密封环槽、若干存油环槽，所述密封环槽与存油环槽相邻布置，且各密封环槽与各存油环槽间隔排列设置，所述密封环包括若干滑环式组合密封，所述滑环式组合密封设于密封环槽内。
  3. 根据权利要求1或2所述一种旋转密封结构，其特征在于：所述密封段靠近直轴肩面的一端形成有缩径部，所述密封环还包括若干骨架油封，所述骨架油封设于缩径部上，各骨架油封的唇口朝向转轴段方向。
  4. 根据权利要求3所述一种旋转密封结构，其特征在于：所述密封 套一端设有用于与环形端盖连接的法兰盘，所述法兰盘错位凸出于密封套端部，使法兰盘、聚氨酯密封环、密封套端面、密封段间形成第一储油腔，所述固定芯轴内设有第一油路通道，所述第一油路通道连通至第一储油腔内。
  5. 根据权利要求4所述一种旋转密封结构，其特征在于：所述密封套位于第一储油腔一端的内侧开设有朝向密封环槽方向的倾斜面，所述第一油路通道连通至倾斜面处的第一储油腔。
  6. 根据权利要求1所述一种旋转密封结构，其特征在于：所述推力球轴承、分隔轴套、调心滚子轴承、转轴套间形成有第二储油腔，所述分隔轴套上设有内外连通的导油通道，固定芯轴内设有第二油路通道，所述第二油路通道通过导油通道连通至第二储油腔内。
  7. 根据权利要求1所述一种旋转密封结构，其特征在于：所述封闭端盖朝向固定段的一端形成有凹槽，所述凹槽、推力球轴承、固定段间形成第三储油腔，固定芯轴内设有第二油路通道，所述第二油路通道连通至第三储油腔内。
  8. 根据权利要求1所述一种旋转密封结构，其特征在于：所述固定芯轴内设有第一油路通道、第二油路通道，所述第一油路通道与第二油路通道无交汇的独立设置，所述第一油路通道通过第一油嘴进油，所述第二油路通道通过第二油嘴进油。
  9. 根据权利要求1所述一种旋转密封结构，其特征在于：推力球轴承包括第一座圈、第二座圈、滚子，封闭端盖与转轴套锁紧对第一座圈侧向挤压，第一座圈与转轴段间具有间隙，第二座圈与转轴段接触连接且第 二座圈与转轴套间具有间隙，调心滚子轴承包括外圈、内圈、双列滚子，外圈与转轴套接触连接，内圈与转轴段接触连接，且内圈两侧分别直轴肩面与分隔轴套相抵。
  10. 根据权利要求1所述一种旋转密封结构，其特征在于：所述密封段上设有复数个凸起的存油环槽，相邻存油环槽间形成密封环槽；所述密封环包括若干滑环式组合密封，所述滑环式组合密封设于密封环槽内。
  11. 一种螺旋式砂水分离机，其特征在于：包括权利要求1-10任意一项所述一种旋转密封结构。
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