WO2020151224A1 - 一种具备烘干功能的锁风喂料装置 - Google Patents
一种具备烘干功能的锁风喂料装置 Download PDFInfo
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- WO2020151224A1 WO2020151224A1 PCT/CN2019/101002 CN2019101002W WO2020151224A1 WO 2020151224 A1 WO2020151224 A1 WO 2020151224A1 CN 2019101002 W CN2019101002 W CN 2019101002W WO 2020151224 A1 WO2020151224 A1 WO 2020151224A1
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- air
- feeding device
- drying function
- rotating shaft
- plate
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
- B65G53/04—Conveying materials in bulk pneumatically through pipes or tubes; Air slides
- B65G53/16—Gas pressure systems operating with fluidisation of the materials
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
- B65G53/34—Details
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
- B65G53/34—Details
- B65G53/40—Feeding or discharging devices
- B65G53/46—Gates or sluices, e.g. rotary wheels
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
Definitions
- the invention relates to the field of feeding devices, in particular to an air-locking feeding device with drying function.
- Feeding device is a kind of industrial equipment used in various industries. It is mainly used to transport materials to downstream equipment for corresponding processing. In some applications, it is not only necessary to smoothly transport materials to downstream equipment, but also It has the function of air lock, that is, while completing the material transportation, it minimizes the entry of external air into the downstream equipment and affects the system working conditions.
- a good air-locking effect is directly related to the energy consumption of the entire process system and the stability of the production state.
- a good air-locking effect and low internal wear of the equipment are the main indicators for considering the feeding device. Therefore, reducing the air leakage of the feeding device as much as possible is one of the key technical problems to be solved.
- the rotary feeding device in use does not adopt an effective drying device, which is not suitable for materials with high moisture content, which causes the materials to easily adhere to the shell, causing the gap between the rotating blade and the shell to change.
- an effective drying device which is not suitable for materials with high moisture content, which causes the materials to easily adhere to the shell, causing the gap between the rotating blade and the shell to change.
- the wear of the rotating blades is aggravated, and the gap between the blades and the casing is increased, causing serious air leakage; on the other hand, it will also cause large running resistance of the rotating rotor, causing the motor to overload and stop, affecting production safety.
- the purpose of the present invention is to provide an air-locking feeding device with drying function in view of the deficiencies in the prior art.
- the present invention provides an air-locking feeding device with drying function, which includes a casing, a power device and a rotating rotor.
- the center of the rotating rotor is arranged in the casing.
- the upper and lower ends of the body are respectively provided with an upper end flange and a lower end flange, and its two sides are respectively provided with side end flanges.
- the upper end flange and the lower end flange are sequentially provided with an inlet and an outlet, so
- the side flange is provided with a supporting device for supporting the slewing rotor.
- the slewing rotor includes a rotating shaft connected with the power device, a plurality of blades arranged at intervals around the middle of the rotor, and two blades respectively fixed on the
- the end plates between the two ends of the blades and the rotating shaft, the plurality of blades, the end plates and the outer surface of the rotating shaft are enclosed to form a heating channel, and the end plates on both sides of the heating channel are provided with a number of ventilation holes.
- the plate and the inner side of the two side end flanges are spaced apart to form air passages. The air passages are communicated with the heating channel through the vent holes. trachea.
- the blade is V-shaped, a gap communicating with the heating channel is provided between two adjacent blades, a fixed sealing plate is fixed in the gap at the outer end of the blade, and both ends of the sealing plate are connected to the end plate. connection.
- a sealing device is fitted in the air passage between the side end flange and the end plate.
- the sealing device includes two first annular steel plates fixed on the inner side of the side end flanges at intervals and two second annular steel plates fixed on the outside of the end plates at intervals, and both the first annular steel plate and the second annular steel plate It is arranged with the axis of the rotating shaft as the center of the circle to cooperate to form a ring-shaped labyrinth seal structure.
- a compressed air pipe is further provided outside the side end flange, and the compressed air pipe is in communication with the middle part of the labyrinth seal.
- first annular steel plates are arranged between two second annular steel plates, and the gap between each first annular steel plate and an adjacent second annular steel plate is 2 mm.
- the inner side of the upper end flange and the lower end flange are respectively provided with a wear-resistant liner, the side of the sealing plate is bolted to an adjusting plate, and the outer end of the adjusting plate is slidingly connected with the wear-resistant liner.
- the ventilation hole includes a plurality of ventilation holes, each ventilation hole is arranged between the gap and the rotating shaft, and the plurality of ventilation holes are arranged in an annular array with the axis of the rotating shaft as a center point.
- the power device includes a reduction motor, and it is connected with the rotating shaft via a coupling.
- a shaft seal is also provided on the side end flange, the shaft seal is arranged inside the supporting device, and the rotating shaft is slidably connected in the shaft seal.
- the wear-resistant liner of the present invention is convenient to replace, and the drying mechanism is provided to effectively prevent the wear of the rotor from material bonding and the increase in running resistance, reduce the energy consumption of the system, and have a longer service life and more environmental protection.
- Figure 1 is a schematic structural diagram of an air lock feeding device with drying function according to an embodiment of the present invention
- FIG. 2 is a partial schematic side view of the air-locking feeding device with drying function according to an embodiment of the present invention
- Fig. 3 is a partial enlarged schematic diagram of area A in Fig. 1.
- the embodiment of the present invention provides an air-locking feeding device with drying function.
- the device includes a housing 1, a power device 2 and a rotary rotor 3, and the center of the rotary rotor 3 is arranged
- an upper flange 4 and a lower flange 5 are respectively provided at the upper and lower ends of the housing 1
- side flanges 6 are respectively provided at both ends of the housing 1.
- the upper flange 4 and the lower end The flange 5 and the side end flange 6 are preferably bolted to the housing 1.
- a feed port 7 is provided on the upper flange 4, a discharge port 8 is provided on the lower flange 5, a supporting device 9 is provided on the side flange 6, and the rotary rotor 3 is supported by the supporting device 9.
- the supporting device 9 includes a bearing, and the rotating rotor 3 is installed in the bearing, and the bearing can reduce the rotating resistance of the rotating rotor 3.
- the power plant 2 preferably adopts a geared motor.
- the rotating rotor 3 includes a rotating shaft 31, a plurality of blades 32 and two end plates 33. Among them, the rotating shaft 31 is connected to the power device 2, and the rotating shaft 31 and the power device 2 are preferably connected by a coupling 10.
- the blades 32 and the end plate 33 are both arranged inside the casing 1, and a plurality of blades 32 are arranged around the rotor 31, and the inner side of the blades 32 is not connected with the rotating shaft 31, and there is a space between the two.
- the middle part of the end plate 33 is fixedly connected to the rotating shaft 31, and both ends of the blade 32 are fixedly connected to the inner side of the end plate 33.
- the plurality of blades 32, the end plate 33 and the outer surface of the rotating shaft 31 enclose a heating channel 34.
- the outer side of the blade 32, the inner side 11 of the two end plates and the inner side of the casing 1 form a material space, and the material entered from the feed port 7 is transported to the discharge port 8 to be discharged by rotation.
- the end plate 33, the rotating shaft 31 and the blade 32 are preferably fixed by welding.
- a number of air holes 35 are provided on the end plates 33 on both sides of the heating channel 34.
- the two end plates 33 and the inner sides of the two side end flanges 6 respectively form an air passage 11 at intervals, and the air passage 11 communicates with the heating channel 34 through the vent 35.
- One of the two side end flanges 6 is provided with a drying air inlet pipe 12, and the other is provided with a drying air outlet pipe 13.
- the drying air inlet pipe 12 and the drying air outlet pipe 13 are respectively connected with the air passage 11 on the side.
- hot air enters from the drying air intake pipe 12, passes through the air passage 11, and enters the heating passage 34, thereby increasing the temperature of the blades 33 outside the heating passage 34, and then drying the material, which is discharged from the heating passage 34
- the hot air enters the drying outlet duct 13 through the air duct 11 on the other side and is discharged.
- the pressure difference between the drying air inlet pipe 12 and the drying air outlet pipe 13 is controlled between 500 and 1200 Pa, and the air inlet temperature is between 150 and 250°C.
- the blades 32 are preferably arranged in a V shape, and a gap 36 is provided between two adjacent blades 32.
- the gap 36 is connected to the heating channel 34 so that hot air can enter In the gap 36, the hot air is in contact with the blade 32 in a large area, so that the temperature of the blade 32 can be quickly increased and is beneficial to maintain the temperature.
- a sealing plate 37 is fixed in the gap 36 at the outer end of the blade 32, and both ends of the sealing plate 37 are connected with the end plate 33.
- the sealing plate 37, the blade 32 and the end plate 33 are preferably welded and fixed.
- the ventilation hole 35 includes a plurality of ventilation holes 35, and each ventilation hole 35 is arranged between the gap 36 and the rotating shaft 31, so that the hot air enters the gap 36 more easily after entering the ventilation hole 35.
- the multiple ventilation holes 35 are arranged in an annular array with the axis of the rotating shaft 31 as the center point.
- the sealing device 15 preferably used in the embodiment of the present invention includes two first annular steel plates 151 fixed on the inner side of the side end flange 6 at intervals and two second annular steel plates 152 fixed on the outside of the end plate 11 at intervals.
- the first annular steel plate 151 Both the second and second annular steel plates 152 are arranged with the axis of the rotating shaft 31 as the center, so as not to affect the rotation of the rotary rotor 3, and the first and second annular steel plates 151 and 152 cooperate to form an annular labyrinth seal structure.
- two first circular steel plates 151 are arranged between two second circular steel plates 152, and the gap between each first circular steel plate 151 and an adjacent second circular steel plate 152 is preferably 2 mm.
- a compressed air pipe 14 is also provided on the outer side of the side end flange 6, and the compressed air pipe 14 communicates with the middle of the labyrinth seal. The compressed air is forced into the labyrinth seal to prevent dust from entering.
- the compressed air pressure is preferably between 0.4 and 0.6Mpa.
- a wear liner 16 is provided on the inner side of the upper flange 4 and the lower flange 5, and an adjusting plate 38 is connected to the side of the sealing plate 37.
- the outer end of the adjusting plate 38 and the wear liner 16 Sliding connection.
- the adjusting plate 38 is preferably connected with the sealing plate 37 by bolts. By providing a waist-shaped hole on the sealing plate 37 or the adjusting plate 38, the position of the adjusting plate 38 can be adjusted after loosening the bolts, so that the adjusting plate 38 and the anti-wear lining
- the inside of the plate 16 is attached.
- a shaft seal 17 is also provided on the side flange 6.
- the shaft seal 17 is arranged inside the support device 9, and the shaft 31 slides Connected in the shaft seal 17.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Drying Of Solid Materials (AREA)
Abstract
一种具备烘干功能的锁风喂料装置，包括壳体（1）、动力装置（2）和回转转子（3），回转转子（3）包括与动力装置（2）连接的转轴（31）、多个在转子（3）中部四周间隔设置的叶片（32）和两个分别固定在叶片（32）两侧端与转轴（31）之间的端板（33），多个叶片（32）、端板（33）与转轴（31）外表面围合形成加热通道（34），加热通道（34）两侧的端板（33）上均设有若干透气孔（35），两个端板（33）与两个侧端法兰（6）内侧分别间隔形成气道（11），气道（11）通过透气孔（35）与加热通道（34）连通，两个端板（33）外侧依次设有与气道（11）连通的烘干进气管（12）和烘干出气管（13）。通过设置烘干机构，有效防止物料粘结对转子（3）的磨损和运行阻力的增加，降低系统的能量消耗，使用寿命更长、更环保。
Description
本发明涉及喂料装置领域，具体涉及一种具备烘干功能的锁风喂料装置。
喂料装置是一种应用到各种行业的工业设备，主要用于将物料输送到下游设备中进行相应的作业处理，在某些使用场合，不仅需要顺利将物料输送到下游设备，而且还要具有锁风功能，即在完成物料输送的同时，尽可能减少外部空气进入到下游设备内部，对系统工况造成影响。
锁风效果好直接关系到整个工艺系统的能耗及生产状态的稳定，锁风效果好、设备内部磨损低是考量喂料装置主要指标。因此，尽可能降低喂料装置的漏风是需要解决的关键技术问题之一。
目前，使用的旋转式喂料装置，没有采取有效的烘干装置，不适应水份高的物料情况，导致物料容易粘结在壳体上，造成回转叶片与壳体间隙发生变化，一方面，加剧回转叶片的磨损，增加了叶片和壳体之间的间隙，造成漏风严重；另一方面，也会造成回转转子运转阻力大，导致电机超载跳停，影响生产安全。
发明内容
本发明的目的是针对现有技术存在的不足，提供一种具备烘干功能的锁风喂料装置。
为实现上述目的，本发明提供了一种具备烘干功能的锁风喂料装置，包括壳体、动力装置和回转转子，所述回转转子的中部设置在壳体内，所述壳体的上下两端分别设有上端法兰和下端法兰，其两侧端分别设有侧端法兰，所述上端法兰和下端法兰上依次设有进料口和出料口，所述侧端法兰上设有用于支承回转转子的支承装置，所述回转转子包括与动力装置连接的转轴、多个在转子中部四周间隔设置的叶片和两个分别固定在所述叶片两侧端与转轴之间的端板，所述多个叶片、端板与转轴外表面围合形成加热通道，所述加热通道两侧的端板上均设有若干透气孔，两个端板与两个侧端法兰内侧分别间隔形成气道，所述气道通过透气孔与加热通道连通，两个端板外侧依次设有与所述气道连通的烘干进气管和烘干出气管。
进一步的，所述叶片呈V型状，两个相邻的叶片之间设有与加热通道连通的间隙，所述叶片外端的间隙内固定定封板，所述封板的两端与端板连接。
进一步的，所述侧端法兰与端板之间的气道内配合设有密封装置。
进一步的，所述密封装置包括两道间隔固定在侧端法兰内侧的第一环形钢板和两道间隔固定在端板外侧的第二环形钢板，所述第一环形钢板与第二环形钢板均以转轴的轴心为圆心设置，以配合形成环型迷宫密封结构。
进一步的，所述侧端法兰外侧还设有压缩空气管，所述压缩空气管与迷宫密封中部连通。
进一步的，两个第一环形钢板设置在两个第二环形钢板之间，每道第一环形钢板与相邻的一道第二环形钢板之间的间隙为2mm。
进一步的，所述上端法兰和下端法兰内侧分别设有防磨衬板，所述封板的侧部螺栓连接有调整板，所述调整板的外端与防磨衬板滑动连接。
进一步的，所述透气孔包括多个，每一透气孔设置在间隙与转轴之间，所述多个透气孔以转轴的轴心为中心点环形阵列设置。
进一步的，所述动力装置包括减速电机，且其与所述转轴经联轴器连接。
进一步的，所述侧端法兰上还设有轴封，所述轴封设置在支承装置的内侧，所述转轴滑动连接在轴封内。
有益效果：本发明的防磨衬板更换方便，通过设置烘干机构，有效防止物料粘结对转子的磨损和运行阻力的增加，降低系统的能量消耗，使用寿命更长、更环保。
图1是本发明实施例的具备烘干功能的锁风喂料装置的结构示意图；
图2是本发明实施例的具备烘干功能的锁风喂料装置的局部侧视示意图；
图3是图1中A区域的局部放大示意图。
下面结合附图和具体实施例，进一步阐明本发明，本实施例在以本发明技术方案为前提下进行实施，应理解这些实施例仅用于说明本发明而不用于限制本发明的范围。
如图1所示，本发明实施例提供了一种具备烘干功能的锁风喂料装置，该装置包括壳体1、动力装置2和回转转子3，回转转子3的中部设置在壳体1内，在壳体1的上下两端分别设有上端法兰4和下端法兰5，在壳体1的两侧端分别设有侧端法兰6，上端法兰4、下端法兰5和侧端法兰6均优选与壳体1螺栓连接。在上端法兰4上设有进料口7，在下端法兰5上设有出料口8，侧端法兰6上设有支承装置9，回转转子3通过支承装置9进行支承，具体的，支承装置9包括一个轴承，回转转子3安装在轴承内，轴承可以减小回转 转子3的回转阻力。动力装置2优选采用减速电机。回转转子3包括转轴31、多个叶片32和两个端板33。其中，转轴31与动力装置2连接，转轴31与动力装置2优选采用联轴器10连接。叶片32与端板33均设置在壳体1的内部，多个叶片32设置在转子31的四周，并且，叶片32的内侧不与转轴31连接，两者之间设有间隔。端板33的中部固定连接在转轴31上，叶片32的两端固定连接在端板33的内侧。多个叶片32、端板33与转轴31外表面围合形成加热通道34。叶片32的外侧、两个端板内侧11与壳体1内侧形成物料空间，并通过转动将从进料口7进入的物料输送至出料口8排出。
为了提高密封效果，端板33与转轴31和叶片32均优选为焊接固定。在加热通道34两侧的端板33上均设有若干透气孔35。两个端板33与两个侧端法兰6内侧分别间隔形成气道11，气道11通过透气孔35与加热通道34连通。两个侧端法兰6中的一个设有烘干进气管12，另一个设有烘干出气管13，烘干进气管12和烘干出气管13分别与该侧的气道11连通。进而，热空气从烘干进气管12进入，通过气道11后进入加热通道34内，从而使加热通道34外侧的叶片33的温度升高，进而对物料进行烘干，从加热通道34排出的热风经另一侧气道11进入烘干出气管13后排出。烘干进气管12与烘干出气管13之间的压差控制在500～1200Pa之间，进气温度在150～250℃之间。
为了提高烘干效果，且不影响喂料，优选将叶片32设置呈V型状，两个相邻的叶片32之间设有间隙36，间隙36与加热通道34连通，进而使热空气可进入间隙36内，热空气与叶片32大面积接触，使叶片32的温度可快速升高并利于维持温度。为了防止热空气从叶片32外端的间隙36处泄露，在叶片32外端的间隙36内固定封板37，封板37的两端与端板33连接。封板37与叶片32和端板33均优选焊接固定。为了进一步提高烘干效果，透气孔35包括多个，每一透气孔35设置在间隙36与转轴31之间，使得热空气从通气孔35进入后更加便于进入间隙36内。多个透气孔35以转轴31的轴心为中心点环形阵列设置。
为了防止用于烘干的热空气从从端板33与壳体1之间泄漏，影响物料的烘干效果，在侧端法兰6与端板11之间的气道12内配合设有密封装置15。本发明实施例优选采用的密封装置15包括两道间隔固定在侧端法兰6内侧的第一环形钢板151和两道间隔固定在端板11外侧的第二环形钢板152，第一环形钢板151和第二环形钢板152均以转轴31的轴心为圆心设置，使其不影响回转转子3转动，第一环形钢板151和第二环形钢板152配合形成环型迷宫密封结构。优选将两个第一环形钢板151设置在两个第二环形钢板152之间，并且，每道第一环形钢板151与相邻的一道第二环形钢板152之间的间隙优选为2mm。为了 防止灰尘进入迷宫密封造成磨损，在侧端法兰6的外侧还设有压缩空气管14，压缩空气管14与迷宫密封的中部连通。通过向迷宫密封中强制通入压缩空气，避免灰尘进入。通入的压缩空气气压优选在0.4～0.6Mpa之间。
为了提高密闭效果，在上端法兰4和下端法兰5的内侧分别设有防磨衬板16，在封板37的侧部连接有调整板38，调整板38的外端与防磨衬板16滑动连接。调整板38优选与封板37螺栓连接，通过在封板37或调整板38上设置腰型孔，松开该处的螺栓后即可调整调整板38的位置，使得调整板38与防磨衬板16的内侧贴合。为了防止气道11内的热空气从转轴31与侧端法兰6之间泄漏，在侧端法兰6上还设有轴封17，轴封17设置在支承装置9的内侧，转轴31滑动连接在轴封17内。
以上所述仅是本发明的优选实施方式，应当指出，对于本技术领域的普通技术人员来说，其它未具体描述的部分，属于现有技术或公知常识。在不脱离本发明原理的前提下，还可以做出若干改进和润饰，这些改进和润饰也应视为本发明的保护范围。
Claims (10)
- 一种具备烘干功能的锁风喂料装置，包括壳体、动力装置和回转转子，所述回转转子的中部设置在壳体内，所述壳体的上下两端分别设有上端法兰和下端法兰，其两侧端分别设有侧端法兰，所述上端法兰和下端法兰上依次设有进料口和出料口，所述侧端法兰上设有用于支承回转转子的支承装置，其特征在于，所述回转转子包括与动力装置连接的转轴、多个在转子中部四周间隔设置的叶片和两个分别固定在所述叶片两侧端与转轴之间的端板，所述多个叶片、端板与转轴外表面围合形成加热通道，所述加热通道两侧的端板上均设有若干透气孔，两个端板与两个侧端法兰内侧分别间隔形成气道，所述气道通过透气孔与加热通道连通，两个端板外侧依次设有与所述气道连通的烘干进气管和烘干出气管。
- 根据权利要求1所述的具备烘干功能的锁风喂料装置，其特征在于，所述叶片呈V型状，两个相邻的叶片之间设有与加热通道连通的间隙，所述叶片外端的间隙内固定定封板，所述封板的两端与端板连接。
- 根据权利要求1所述的具备烘干功能的锁风喂料装置，其特征在于，所述侧端法兰与端板之间的气道内配合设有密封装置。
- 根据权利要求3所述的具备烘干功能的锁风喂料装置，其特征在于，所述密封装置包括两道间隔固定在侧端法兰内侧的第一环形钢板和两道间隔固定在端板外侧的第二环形钢板，所述第一环形钢板与第二环形钢板均以转轴的轴心为圆心设置，以配合形成环型迷宫密封结构。
- 根据权利要求4所述的具备烘干功能的锁风喂料装置，其特征在于，所述侧端法兰外侧还设有压缩空气管，所述压缩空气管与迷宫密封中部连通。
- 根据权利要求4所述的具备烘干功能的锁风喂料装置，其特征在于，两个第一环形钢板设置在两个第二环形钢板之间，每道第一环形钢板与相邻的一道第二环形钢板之间的间隙为1～3mm。
- 根据权利要求2所述的具备烘干功能的锁风喂料装置，其特征在于，所述上端法兰和下端法兰内侧分别设有防磨衬板，所述封板的侧部螺栓连接有调整板，所述调整板的外端与防磨衬板滑动连接。
- 根据权利要求2所述的具备烘干功能的锁风喂料装置，其特征在于，所述透气孔包括多个，每一透气孔设置在间隙与转轴之间，所述多个透气孔以转轴的轴心为中心点环形阵列设置。
- 根据权利要求1所述的具备烘干功能的锁风喂料装置，其特征在于，所述动力装置包括减速电机，且其与所述转轴经联轴器连接。
- 根据权利要求1所述的具备烘干功能的锁风喂料装置，其特征在于，所述侧端法兰上还设有轴封，所述轴封设置在支承装置的内侧，所述转轴滑动连接在轴封内。
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