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CN106195005B - 一种刀筒回转式回转刀横切刀辊 - Google Patents

一种刀筒回转式回转刀横切刀辊 Download PDF

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CN106195005B
CN106195005B CN201610590689.7A CN201610590689A CN106195005B CN 106195005 B CN106195005 B CN 106195005B CN 201610590689 A CN201610590689 A CN 201610590689A CN 106195005 B CN106195005 B CN 106195005B
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CN106195005A (zh
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李秉江
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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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C32/00—Bearings not otherwise provided for
    • F16C32/06—Bearings not otherwise provided for with moving member supported by a fluid cushion formed, at least to a large extent, otherwise than by movement of the shaft, e.g. hydrostatic air-cushion bearings
    • F16C32/0629—Bearings not otherwise provided for with moving member supported by a fluid cushion formed, at least to a large extent, otherwise than by movement of the shaft, e.g. hydrostatic air-cushion bearings supported by a liquid cushion, e.g. oil cushion
    • F16C32/064—Bearings not otherwise provided for with moving member supported by a fluid cushion formed, at least to a large extent, otherwise than by movement of the shaft, e.g. hydrostatic air-cushion bearings supported by a liquid cushion, e.g. oil cushion the liquid being supplied under pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
    • B26D1/01—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work
    • B26D1/12—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis
    • B26D1/25—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a non-circular cutting member
    • B26D1/26—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a non-circular cutting member moving about an axis substantially perpendicular to the line of cut
    • B26D1/28—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a non-circular cutting member moving about an axis substantially perpendicular to the line of cut and rotating continuously in one direction during cutting
    • B26D1/285—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a non-circular cutting member moving about an axis substantially perpendicular to the line of cut and rotating continuously in one direction during cutting for thin material, e.g. for sheets, strips or the like
    • 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
    • F16C32/00—Bearings not otherwise provided for
    • F16C32/06—Bearings not otherwise provided for with moving member supported by a fluid cushion formed, at least to a large extent, otherwise than by movement of the shaft, e.g. hydrostatic air-cushion bearings
    • F16C32/0629—Bearings not otherwise provided for with moving member supported by a fluid cushion formed, at least to a large extent, otherwise than by movement of the shaft, e.g. hydrostatic air-cushion bearings supported by a liquid cushion, e.g. oil cushion
    • F16C32/064—Bearings not otherwise provided for with moving member supported by a fluid cushion formed, at least to a large extent, otherwise than by movement of the shaft, e.g. hydrostatic air-cushion bearings supported by a liquid cushion, e.g. oil cushion the liquid being supplied under pressure
    • F16C32/0651—Details of the bearing area per se
    • F16C32/0655—Details of the bearing area per se of supply openings
    • 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
    • F16C32/00—Bearings not otherwise provided for
    • F16C32/06—Bearings not otherwise provided for with moving member supported by a fluid cushion formed, at least to a large extent, otherwise than by movement of the shaft, e.g. hydrostatic air-cushion bearings
    • F16C32/0662—Details of hydrostatic bearings independent of fluid supply or direction of load
    • F16C32/0666—Details of hydrostatic bearings independent of fluid supply or direction of load of bearing pads

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Sliding-Contact Bearings (AREA)

Abstract

本发明提供一种刀筒回转式回转刀横切刀辊，包括用于安装刀片的回转刀筒、用于支撑回转刀筒的支撑芯轴，所述回转刀筒绕固定的支撑芯轴旋转，其特点是：所述支撑芯轴沿轴线开设压力油通道，所述支撑芯轴表面覆盖轴承块，所述轴承块为圆弧形块，所述轴承块中部外圆弧表面上设有压力油腔，所述支撑芯轴开设连通所述压力油通道与所述压力油腔的压力油支通道，压力油经所述压力油通道及压力油支通道，在回转刀筒与轴承块之间的压力油腔形成压力油层，称之为液体静压轴承。轴承结构设计合理，可以提高工作精度，降低加工制作的复杂程度，进一步提高装置的综合性能。

Description

一种刀筒回转式回转刀横切刀辊
技术领域
本发明涉及属于切纸机制造技术领域，涉及双回转刀切纸机横切装置横切刀辊的改进，具体说是一种刀筒回转式回转刀横切刀辊。
背景技术
现有的双回转刀装置由于其良好的工作性能，被广泛的应用在造纸、印刷、包装等行业的纸和纸板及像瓦楞板类的复合板的横切方面。双回转刀横切装置，虽然具有优良的性能，但其拖动电机的装机容量也很大，而且由于其工作的特殊性，均采用大功率伺服传动，也存在制作成本和使用成本偏高的情况。采用刀筒旋转，支撑轴固定的设计方式（俗称转刀筒），达到了在保证刀辊的刚度的同时，降低了刀辊旋转部分的转动惯量，进而达到降低拖动电机的装机容量。目前刀筒支撑轴承采用的是滚针轴承，其特点是结构紧凑，基本上能够保证正常的工作速度和工作精度。但是，采用滚针轴承还存在如下缺点：
1、回转刀筒加工制作复杂，加工周期长，成本高，需要高难度的加工方法和专用设备加工。
2、存在长时间的运转磨损后需要更换的问题。由于其安装结构的特点，更换轴承十分困难。
3、滚针轴承的部件是需要淬火处理才能达到理想的工作效果，同时滚针轴承需要的轴向定位、多轴承支撑时的过约束等问题都会增加加工和装配的难度。其加工和装配精度也有待进一步提高。
4、滚针轴承由于其结构紧凑，滚针保持架大多采用钢制，数套同时使用具有较大的运转噪音。
5、很难达到理想的支撑精度要求，不能完全满足高精度的横切需求。
如何设计一种刀筒回转式回转刀横切刀辊，轴承结构设计合理，可以提高工作精度，降低加工制作的复杂程度，进一步提高装置的综合性能。这是目前亟待解决的技术问题。
发明内容
为解决上述技术问题，本发明提供一种刀筒回转式回转刀横切刀辊，轴承结构设计合理，可以达到极高的工作精度，降低加工制作的复杂程度，进一步提高装置的综合性能。
本发明的目的采用以下技术方案予以实现：
一种刀筒回转式回转刀横切刀辊，包括用于安装刀片的回转刀筒、用于支撑回转刀筒的支撑芯轴，所述回转刀筒绕固定的支撑芯轴旋转，其特征在于，所述支撑芯轴沿轴线开设压力油通道，所述支撑芯轴表面覆盖轴承块，所述轴承块为圆弧形块，所述轴承块中部外圆弧表面上设有压力油腔，所述支撑芯轴开设连通所述压力油通道与所述压力油腔的压力油支通道，压力油经所述压力油通道及压力油支通道，在回转刀筒与轴承块之间的压力油腔形成压力油层，称之为液体静压轴承。
对上述技术方案的改进：所述轴承块的压力油腔底部开设通孔，所述支撑芯轴表面上覆盖轴承块的部位设置与所述轴承块形状吻合的凹槽，所述轴承块嵌入所述凹槽中并与所述支撑芯轴结合面形成密封，所述轴承块的压力油腔中心与支撑芯轴共同形成辐射状的所述压力油支通道与支撑芯轴的压力油通道联通；所述支撑芯轴上压力油通道的入口与压力油进油管连接，同圆周方向相邻两轴承块之间留有合理缝隙，且与支撑芯轴外圆和回转刀筒内圆之间的缝隙形成压力油排出通道，压力油沿轴向从支撑芯轴与回转刀筒内圆的缝隙排回轴端齿轮油箱，从轴端齿轮油箱回到压力油站。
对上述技术方案的进一步改进：所述支撑芯轴上的一段环形表面上至少均匀设置三块所述的轴承块，形成圆周直径方向支撑，各所述轴承块的压力油腔分别与对应的一条所述压力油支通道连通。
对上述技术方案的进一步改进：所述支撑芯轴沿轴向至少有两段间隔的环形表面上设置所述轴承块。
对上述技术方案的进一步改进：所述支撑芯轴表面与所述回转刀筒内侧面保持适合的间隙，以形成压力油排出通道。
对上述技术方案的进一步改进：所述支撑芯轴上压力油通道的入口设置在所述支撑芯轴的一端面或两端面上。
与现有技术相比，本发明的优点和积极效果是：
1、本发明在回转刀筒与轴承块之间形成压力油层，成为液体静压轴承，因此，具有极低摩擦系数，滚针轴承本身的摩擦系数是液体静压轴承的1000倍左右。本发明采用液体静压轴承作为支撑轴承，轴承本身的功率损失几乎就可以忽略不计。
2、本发明具有良好的结构精度保持性。液体静压轴承可以说是一种几乎没有磨损的轴承，可以长期的保持原有的零件几何尺寸的精度，不必担心轴承装在辊筒内部，长时间的运转磨损后的更换问题。
3、本发明具有更好的支撑性能和支撑精度。液体静压轴承的工作部分的结构类似于滑动轴承，比滚针轴承具有更紧凑的结构，使支撑芯轴具有更大的外径尺寸，达到更好的支撑效果和刚度。液体静压轴承本身就是无间隙运转，具有极高的运转精度。由于其支撑部位可以灵活的布局，即便回转刀筒在负载作用下有极其微小的变形，也可以达到在刀筒受到垂直上方的负载时，回转刀筒不会产生相对于支撑芯轴水平方向的位移，达到滚针轴承只有在零运转间隙时的支撑效果。原因是在切纸工作时只有刀辊的水平位置精度直接影响上下两刀刃的相对位置精度，直接关系到切纸效果。而采用滚针轴承支撑的刀辊达到如此高的精度无论在加工和装配方面都将是极其困难的。
4、由于液体静压轴承工作部分的结构类似于滑动轴承，因此，本发明无需采用高硬度的部件，进而降低加工的难度。滚针轴承的部件是需要淬火处理才能达到理想的工作效果，而液体静压轴承则一般没有这样的需要。同时滚针轴承需要的轴向定位、多轴承支撑时的过约束等问题都会增加加工和装配的难度。
5、滚针轴承由于其结构紧凑，滚针保持架大多采用钢制，数套同时使用具有较大的运转噪音。本发明液体静压轴承理论上是一种无声轴承，能够降低本部件的运转噪音。
6、由于液体静压轴承所具有的极低的功率损失和极低的工作噪音，在刀辊的轴向方向上具有可以多点、大面积布置使用，本发明可以大幅度的提高支撑芯轴对回转刀筒的支撑效果。
附图说明
图1为本发明一种刀筒回转式回转刀横切刀辊局部剖面结构示意图；
图2为图1中C-C向的剖视放大图。
具体实施方式
下面结合附图和具体实施方式对本发明作进一步详细的说明。
参见图1、图2，本发明一种刀筒回转式回转刀横切刀辊实施例，包括用于安装刀片的回转刀筒1、用于支撑回转刀筒1的支撑芯轴3，支撑芯轴3为固定部件，回转刀筒1绕固定的支撑芯轴3旋转。在支撑芯轴3沿轴线开设压力油通道2，在支撑芯轴3表面覆盖轴承块4，所述轴承块4为圆弧形块，在轴承块4中部外圆弧表面上设有压力油腔 4-1，支撑芯轴3上开设连通所述压力油通道2与所述轴承块4的压力油腔4-1的压力油支通道5，压力油经所述压力油通道2及压力油支通道5，在回转刀筒1与轴承块4之间的压力油腔4-1形成压力油层，称之为液体静压轴承。
具体而言：在上述轴承块4的压力油腔4-1底部开设通孔，轴承块4为厚度适合的圆弧形块，在支撑芯轴3表面上覆盖轴承块4的部位设置与轴承块4形状吻合的凹槽，将轴承块4嵌入凹槽中并与支撑芯轴3结合面形成密封，轴承块4的压力油腔4-1中心与支撑芯轴3共同形成沿支撑芯轴3径向辐射状的压力油支通道5与支撑芯轴3的压力油通道2联通。
上述支撑芯轴3上压力油通道2的入口与压力油进油管连接，同圆周方向相邻两轴承块4之间留有合理缝隙，且与支撑芯轴3外圆和回转刀筒1内圆之间的缝隙形成压力油排出通道，压力油沿轴向从支撑芯轴3与回转刀筒1内圆的缝隙排回轴端齿轮油箱，从轴端齿轮油箱回到压力油站。支撑芯轴3上压力油通道2的入口设置在支撑芯轴3的一端面或两端面上。
如图2所示，在支撑芯轴3上的一段环形表面上均匀设置3块轴承块4（轴承块4也可以设置3块以上），形成圆周直径方向支撑（如图2中3个向外指的箭头代表支撑力方向，图2中最上面一个向下指的箭头代表负载力方向），各所述轴承块4的压力油腔4-1分别与对应的一条压力油支通道5连通，3条压力油支通道5沿支撑芯轴3径向呈辐射状设置，相邻压力油支通道5之间的夹角为120°。
如图1所示，支撑芯轴3上沿轴向至少有两段间隔的环形表面上设置所述轴承块4。
支撑芯轴3表面与回转刀筒1内侧面保持适合的间隙，以形成压力油排出通道。
当具有适合压力的压力油自压力油进油管经压力油通道2的入口进入，再通过分布在支撑芯轴3中的压力油支通道5进入轴承块4上的压力油腔4-1中并充满时，压力油将回转刀筒1托起，在回转刀筒1与轴承块4之间形成压力油层，成为液体静压轴承。当回转刀筒1旋转时，形成真正的、纯粹的液体摩擦。
综上所述，本发明采用液体静压轴承的刀筒回转式回转刀横切刀辊相比现有采用滚针轴承的刀辊具有明显的技术优势和推广使用的价值。
当然，上述说明并非是对本发明的限制，本发明也并不仅限于上述举例，本技术领域的普通技术人员在本发明的实质范围内所做出的变化、改型、添加或替换，也应属于本发明的保护范围。

Claims (6)

1.一种刀筒回转式回转刀横切刀辊，包括用于安装刀片的回转刀筒、用于支撑回转刀筒的支撑芯轴，所述回转刀筒绕固定的支撑芯轴旋转，其特征在于，所述支撑芯轴沿轴线开设压力油通道，所述支撑芯轴表面覆盖轴承块，所述轴承块为圆弧形块，所述轴承块中部外圆弧表面上设有压力油腔，所述支撑芯轴开设连通所述压力油通道与所述压力油腔的压力油支通道，压力油经所述压力油通道及压力油支通道，在回转刀筒与轴承块之间的压力油腔形成压力油层；所述轴承块的压力油腔底部开设通孔，所述支撑芯轴表面上覆盖轴承块的部位设置与所述轴承块形状吻合的凹槽，所述轴承块嵌入所述凹槽中并与所述支撑芯轴结合面形成密封，所述轴承块的压力油腔中心与支撑芯轴共同形成辐射状的所述压力油支通道与支撑芯轴的压力油通道联通；所述支撑芯轴上压力油通道的入口与压力油进油管连接，同圆周方向相邻两轴承块之间留有合理缝隙，且与支撑芯轴外圆和回转刀筒内圆之间的缝隙形成压力油排出通道，压力油沿轴向从支撑芯轴与回转刀筒内圆的缝隙排回轴端齿轮油箱，从轴端齿轮油箱回到压力油站。
2.按照权利要求1所述的刀筒回转式回转刀横切刀辊，其特征在于，所述支撑芯轴上的一段环形表面上至少均匀设置三块所述的轴承块，形成圆周直径方向支撑，各所述轴承块的压力油腔分别与对应的一条所述压力油支通道连通。
3.按照权利要求1或2所述的刀筒回转式回转刀横切刀辊，其特征在于，所述支撑芯轴沿轴向至少有两段间隔的环形表面上设置所述轴承块。
4.按照权利要求1 或2所述的刀筒回转式回转刀横切刀辊，其特征在于，所述支撑芯轴表面与所述回转刀筒内侧面保持适合的间隙，以形成压力油排出通道。
5.按照权利要求3所述的刀筒回转式回转刀横切刀辊，其特征在于，所述支撑芯轴表面与所述回转刀筒内侧面保持适合的间隙，以形成压力油排出通道。
6.按照权利要求1所述的刀筒回转式回转刀横切刀辊，其特征在于，所述支撑芯轴上压力油通道的入口设置在所述支撑芯轴的一端面或两端面上。
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US5393290A (en) * 1991-05-03 1995-02-28 Sulzer-Escher Wyss Gmbh Roll with adjustable deflection

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US3994193A (en) * 1973-10-01 1976-11-30 Domtar Limited Air bearing slitter
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