CN105387072B - A kind of structure of the alternative rolling bearing of hydraulic motor - Google Patents
A kind of structure of the alternative rolling bearing of hydraulic motor Download PDFInfo
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- CN105387072B CN105387072B CN201510704013.1A CN201510704013A CN105387072B CN 105387072 B CN105387072 B CN 105387072B CN 201510704013 A CN201510704013 A CN 201510704013A CN 105387072 B CN105387072 B CN 105387072B
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- 238000005096 rolling process Methods 0.000 title claims abstract description 16
- 238000009826 distribution Methods 0.000 claims abstract description 24
- 238000009434 installation Methods 0.000 claims abstract description 16
- 230000005540 biological transmission Effects 0.000 claims abstract description 15
- 239000004677 Nylon Substances 0.000 claims abstract description 5
- 229920001778 nylon Polymers 0.000 claims abstract description 5
- 230000003746 surface roughness Effects 0.000 claims description 7
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 230000001050 lubricating effect Effects 0.000 claims description 4
- 238000005461 lubrication Methods 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 2
- 229910000746 Structural steel Inorganic materials 0.000 claims description 2
- 229910052799 carbon Inorganic materials 0.000 claims description 2
- 239000004519 grease Substances 0.000 claims description 2
- 239000007788 liquid Substances 0.000 abstract description 5
- 238000007789 sealing Methods 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 35
- 238000000034 method Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000010705 motor oil Substances 0.000 description 1
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- Hydraulic Motors (AREA)
- Motor Or Generator Frames (AREA)
- General Details Of Gearings (AREA)
- Rolling Contact Bearings (AREA)
Abstract
一种液压马达用可替代滚动轴承的结构。其包括：左（右）侧配油盘的小直径段内孔加工有安装双唇骨架油封和孔用弹性挡圈的沟槽，传动轴安装孔加工成截面形状为说明书附图中图4所示的轴向直孔，直通骨架油封右（左）侧沉孔；配油盘与转子接合面加工有O型圈和尼龙挡圈密封用环形沟槽；低压油通过配油盘顶部的细长径向直孔通向传动轴安装孔，使安装孔和转子轴颈之间充满液体介质。与传统液压马达相比，本发明省去了滚动轴承、轴承盖及螺栓，节约成本，装配方便，减小了转子轴颈摩擦表面的表面磨损，承载能力高、径向尺寸小，运行时形成的油膜具有吸收振动、缓和冲击的能力，满足了液压马达的工作条件，延长了其使用寿命。
The utility model relates to a structure that can replace rolling bearings for hydraulic motors. It includes: the inner hole of the small diameter section of the left (right) side oil distribution plate is processed with grooves for installing the double-lip skeleton oil seal and the elastic retaining ring for the hole, and the transmission shaft installation hole is processed into a cross-sectional shape as shown in Figure 4 in the attached drawing of the manual The axial straight hole shown is directly connected to the right (left) counterbore of the frame oil seal; the joint surface between the oil distribution plate and the rotor is processed with an O-ring and a ring groove for nylon retaining ring sealing; the low-pressure oil passes through the slender hole on the top of the oil distribution The radial straight hole leads to the installation hole of the transmission shaft, so that the space between the installation hole and the rotor journal is filled with liquid medium. Compared with the traditional hydraulic motor, the present invention saves rolling bearings, bearing caps and bolts, saves cost, facilitates assembly, reduces surface wear on the friction surface of the rotor journal, has high bearing capacity, small radial dimension, and the The oil film has the ability to absorb vibration and moderate impact, which meets the working conditions of the hydraulic motor and prolongs its service life.
Description
技术领域technical field
本发明属于液压马达领域，特别涉及一种液压马达用可替代滚动轴承的结构。。The invention belongs to the field of hydraulic motors, in particular to a structure for hydraulic motors that can replace rolling bearings. .
背景技术Background technique
液压马达作为液压传动系统的执行元件，具有以下优点：结构简单，尺寸紧凑，运转平稳噪声低，流量和扭矩脉动小，低速性能较好，功率密度大，易于实现较大范围的无级变速，可实现快速而且无冲击的变速和换向。目前现有技术中液压马达大多靠滚动轴承支撑轴颈，装配时需要依靠马达配油盘轴承孔与滚动轴承外圈的过盈配合将滚动轴承压装进轴承孔中，增加了工序和成本，降低了生产效率。另外滚动轴承是靠滚动体的转动来支撑转动轴的，它的径向尺寸、振动和噪声较大，价格也较高，同时由于滚动轴承滚动体的耐磨性较差导致其寿命较短，使用过程中需要频繁地更换，进而影响了设备的使用效率，同时频繁地磨损也造成马达运行时径向窜动的增加，影响液压马达的安全运行及使用寿命。因此本发明提出一种具有承载能力高、径向尺寸小、抗振性好，工作平稳可靠，噪声小，寿命长的可替代滚动轴承的结构。As the actuator of the hydraulic transmission system, the hydraulic motor has the following advantages: simple structure, compact size, stable operation, low noise, small flow and torque ripple, good low-speed performance, high power density, and easy to realize a wide range of continuously variable speed. Allows for quick, jerk-free shifting and direction changes. At present, most of the hydraulic motors in the existing technology rely on rolling bearings to support the journal. During assembly, the rolling bearings need to be pressed into the bearing holes by the interference fit between the bearing hole of the motor oil distribution plate and the outer ring of the rolling bearing, which increases the process and cost and reduces production. efficiency. In addition, rolling bearings rely on the rotation of rolling elements to support the rotating shaft. Its radial size, vibration and noise are relatively large, and its price is relatively high. Frequent replacement is required, which affects the use efficiency of the equipment. At the same time, frequent wear and tear also increases the radial movement of the motor during operation, which affects the safe operation and service life of the hydraulic motor. Therefore, the present invention proposes a structure that can replace rolling bearings with high bearing capacity, small radial dimension, good vibration resistance, stable and reliable operation, low noise and long service life.
发明内容Contents of the invention
本发明目的在于提供一种液压马达用可替代滚动轴承的结构，可以实现在不使用滚动轴承的情况下，满足传动轴的支撑、润滑和液压马达的使用要求。The purpose of the present invention is to provide a structure that can replace rolling bearings for hydraulic motors, which can meet the support and lubrication of transmission shafts and the use requirements of hydraulic motors without using rolling bearings.
为实现上述目的，本发明提供了一种液压马达用可替代滚动轴承的结构，其包括：左（右）侧配油盘的小直径段内孔加工有安装双唇骨架油封和孔用弹性挡圈的沟槽，传动轴安装孔加工成截面形状如图4所示的轴向直孔，直通骨架油封右（左）侧沉孔；左、右侧配油盘与转子接合面加工有环形沟槽，内部采用O型圈和尼龙挡圈密封，配油盘顶部加工有细长径向直孔通向传动轴安装孔。In order to achieve the above purpose, the present invention provides a structure that can replace rolling bearings for hydraulic motors, which includes: the inner hole of the small diameter section of the left (right) side oil distribution plate is processed with a double-lip skeleton oil seal and a circlip for the hole The drive shaft installation hole is processed into an axial straight hole with a cross-sectional shape as shown in Figure 4, which goes straight to the right (left) counterbore of the skeleton oil seal; the left and right oil distribution plates and the rotor joint surface are processed with annular grooves , the interior is sealed with O-rings and nylon retaining rings, and the top of the oil distribution plate is processed with a slender radial straight hole leading to the drive shaft installation hole.
优选地，上述技术方案中，传动轴安装孔加工成截面形状如图4所示的轴向直孔。Preferably, in the above technical solution, the transmission shaft installation hole is processed into an axial straight hole with a cross-sectional shape as shown in FIG. 4 .
优选地，上述技术方案中，左、右配油盘材料为优质碳素结构钢45钢，轴的材料为低淬透性调质钢40Cr。Preferably, in the above technical solution, the material of the left and right oil distribution plates is high-quality carbon structural steel 45 steel, and the material of the shaft is 40Cr quenched and tempered steel with low hardenability.
优选地，上述技术方案中，截面形状如图4所示的安装孔，其中较大的圆孔尺寸为Preferably, in the above technical solution, the cross-sectional shape of the mounting hole is as shown in Figure 4, wherein the size of the larger circular hole is
mm，较小的圆弧尺寸为R2.5mm且距安装孔圆心纵向距离为5.7mm，支撑、润滑段传动轴尺寸为mm。 mm, the smaller arc size is R2.5mm and the longitudinal distance from the center of the installation hole is 5.7mm, the size of the drive shaft in the support and lubricating section is mm.
优选地，上述技术方案中，骨架油封段对应传动轴的尺寸 15 js6(±0.0055)mm，表面粗糙度Ra介于0.1和0.32之间，而且这一段轴需要进行切磨处理。Preferably, in the above technical solution, the skeleton oil seal section corresponds to the size of the transmission shaft 15 js6(±0.0055)mm, the surface roughness Ra is between 0.1 and 0.32, and this section of the shaft needs to be cut and ground.
优选地，上述技术方案中，左（右）侧配油盘的小直径段内孔安装有双唇骨架油封和孔用弹性挡圈。Preferably, in the above technical solution, the inner hole of the small-diameter section of the left (right) side oil distribution plate is installed with a double-lip skeleton oil seal and a circlip for the hole.
优选地，上述技术方案中，在左（右）侧配油盘双唇骨架油封圆柱孔的中部靠前位置加工有倒三角形的环形沟槽，便于圆柱孔涂抹润滑脂后骨架油封的压装；在骨架油封圆柱孔的下方加工有一侧带有圆角的圆柱状沉孔，便于低压油的引入和骨架油封的润滑。Preferably, in the above technical solution, an inverted triangular annular groove is processed at the front of the middle part of the cylindrical hole of the double-lip skeleton oil seal of the left (right) side oil distribution plate, which facilitates the press-fitting of the skeleton oil seal after the cylindrical hole is coated with grease; A cylindrical counterbore with rounded corners on one side is processed below the cylindrical hole of the skeleton oil seal, which is convenient for the introduction of low-pressure oil and the lubrication of the skeleton oil seal.
与现有技术相比，本发明具有如下有益效果：在满足液压马达的使用要求下，依据流体动压润滑形成原理，将传动轴安装孔加工成具有径向滑动轴承轴瓦的功用，左（右）侧配油盘的小直径段内孔安装双唇骨架油封和孔用弹性挡圈进行密封和定位。这样省去了液压马达原有的滚动轴承，减少了装配工序和成本，提高了生产效率和液压马达吸收振动、缓和冲击的能力，延长了马达的使用寿命，对液压马达的市场推广具有积极意义。Compared with the prior art, the present invention has the following beneficial effects: while meeting the requirements of the hydraulic motor, according to the formation principle of hydrodynamic pressure lubrication, the installation hole of the transmission shaft is processed to have the function of the bearing bush of the radial sliding bearing, left (right) ) The inner hole of the small-diameter section of the side oil distribution plate is installed with a double-lip skeleton oil seal and the hole is sealed and positioned with an elastic circlip. This saves the original rolling bearing of the hydraulic motor, reduces the assembly process and cost, improves the production efficiency and the ability of the hydraulic motor to absorb vibration and moderate impact, prolongs the service life of the motor, and has positive significance for the market promotion of the hydraulic motor.
附图说明Description of drawings
图1是液压马达的结构示意图，图2是左侧配油盘的结构示意图，图3是图2的A-A剖视图，图4是图3的K向局部视图。Fig. 1 is a schematic structural view of a hydraulic motor, Fig. 2 is a schematic structural view of a left oil distribution plate, Fig. 3 is a sectional view along A-A of Fig. 2 , and Fig. 4 is a partial view along the direction K of Fig. 3 .
主要附图标记说明：Explanation of main reference signs:
图1中孔用弹性挡圈1、10，双唇骨架油封2、9，O型圈4、7，尼龙挡圈5、6，传动轴11，左侧配油盘3及低压油道100，右侧配油盘8及低压油道200。Circlips 1 and 10 for holes in Fig. 1, double-lip skeleton oil seals 2 and 9, O-rings 4 and 7, nylon retaining rings 5 and 6, transmission shaft 11, left oil distribution plate 3 and low-pressure oil passage 100, The right oil distribution plate 8 and the low-pressure oil passage 200.
具体实施方式Detailed ways
下面结合附图，对本发明的具体实施方式进行详细描述，但应当理解本发明的保护范围并不受具体实施方式的限制。The specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific embodiments.
如图1所示，根据本发明具体实施方式的一种液压马达用可替代滚动轴承的结构，其包括：左（右）侧配油盘的小直径段内孔加工有安装双唇骨架油封2(9)和孔用弹性挡圈1(10)的沟槽，传动轴11安装孔加工成截面形状如图4所示的轴向直孔，直通骨架油封2(9)右（左）侧沉孔；左（右)侧配油盘3(8)与转子接合面加工有环形沟槽，内部采用O型圈4(7)和尼龙挡圈5(6)密封，配油盘3(8)顶部加工有细长直孔100(200)通向传动轴11安装孔。截面形状如图4所示的传动轴安装孔，其表面粗糙度Ra≤0.4，其中较大的圆孔尺寸为mm，较小的圆弧尺寸为R2.5mm且距安装孔圆心纵向距离为5.7mm，对应支撑、润滑段轴的表面粗糙度Ra≤0.1，尺寸为mm，所以安装孔和轴颈构成的摩擦副的表面粗糙度Ra≤0.4，呈间隙配合状态。当液压马达工作时，左（右）侧配油盘3(8)顶部径向直孔100(200)接入低压油，使传动轴11安装孔和转子轴颈之间构成的缝隙内充满液体介质，安装孔起到了滑动轴承内圈轴瓦的作用。液体介质的填充和间隙配合使安装孔和转子轴颈分离而不发生直接接触，减小了二者的摩擦损失和其表面磨损；运行时液体介质形成的油膜具有吸振降噪能力，从而使液压马达工作平稳、可靠、无噪声，实现了液压马达的长寿命安全运行并保证其使用效率。左（右）侧配油盘3(8)的小直径段内孔安装有双唇骨架油封2(9)和孔用弹性挡圈1(10)，骨架油封用于密封液体介质外泄，其中副唇起防尘作用，可以防止外界的灰尘、杂质等进入马达内部；孔用弹性挡圈1(10)可以固定骨架油封2(9)的轴向位置，防止其窜动。As shown in Figure 1, a hydraulic motor according to a specific embodiment of the present invention can replace the rolling bearing structure, which includes: the inner hole of the small diameter section of the left (right) side oil distribution plate is processed with a double-lip skeleton oil seal 2 ( 9) The groove of the elastic retaining ring 1 (10) is used for the hole, and the installation hole of the transmission shaft 11 is processed into an axial straight hole with a cross-sectional shape as shown in Figure 4, which goes straight to the right (left) counterbore of the skeleton oil seal 2 (9) ;The oil distribution plate 3(8) on the left (right) side is processed with an annular groove on the joint surface of the rotor, and the inside is sealed with an O-ring 4(7) and a nylon retaining ring 5(6). The top of the oil distribution plate 3(8) The elongated straight hole 100 (200) is processed to lead to the transmission shaft 11 installation hole. The cross-sectional shape of the transmission shaft installation hole shown in Figure 4 has a surface roughness Ra≤0.4, and the size of the larger round hole is mm, the smaller arc size is R2.5mm and the longitudinal distance from the center of the installation hole is 5.7mm, corresponding to the surface roughness of the supporting and lubricating section shaft Ra≤0.1, the size is mm, so the surface roughness of the friction pair formed by the mounting hole and the journal is Ra≤0.4, which is in a state of clearance fit. When the hydraulic motor is working, the radial straight hole 100 (200) on the top of the left (right) side oil distribution plate 3 (8) is connected to low-pressure oil, so that the gap formed between the installation hole of the transmission shaft 11 and the rotor journal is filled with liquid Medium, the mounting hole plays the role of the bearing bush of the inner ring of the sliding bearing. The filling and clearance fit of the liquid medium separate the mounting hole and the rotor journal without direct contact, which reduces the friction loss and surface wear of the two; the oil film formed by the liquid medium has the ability to absorb vibration and reduce noise during operation, so that the hydraulic pressure The motor works smoothly, reliably and without noise, which realizes the long-life and safe operation of the hydraulic motor and ensures its efficiency. The inner hole of the small-diameter section of the left (right) side oil distribution plate 3 (8) is equipped with a double-lip skeleton oil seal 2 (9) and a circlip 1 (10) for the hole. The skeleton oil seal is used to seal the leakage of the liquid medium. The auxiliary lip plays a dust-proof role, which can prevent external dust, impurities, etc. from entering the inside of the motor; the circlip 1 (10) for the hole can fix the axial position of the skeleton oil seal 2 (9) and prevent it from moving.
Claims (5)
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| CN114151444B (en) * | 2021-11-15 | 2023-10-20 | 西安航天精密机电研究所 | Grouping processing and selecting method for shaft tip and bearing of liquid floating gyroscope |
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| US5102237A (en) * | 1976-05-29 | 1992-04-07 | Ide Russell D | Self positioning beam mounted bearing and bearing and shaft assembly including the same |
| DD240717A1 (en) * | 1985-09-06 | 1986-11-12 | Bauakademie Ddr | HYDROSTATIC TRANSLATION SLIDING BEARING |
| CN100455356C (en) * | 2007-07-05 | 2009-01-28 | 贵州优利斯凯机械有限公司 | Vertical shaft support system of vertical shaft type impact crusher, and vertical shaft support device |
| CN101344067B (en) * | 2008-08-22 | 2010-12-01 | 哈尔滨工业大学 | Oil distribution plate and continuous rotary electro-hydraulic servo motor using the oil distribution plate |
| CN102809486A (en) * | 2012-08-09 | 2012-12-05 | 浙江传媒学院 | Driving mechanism of mute life testing machine of rolling bearing |
| CN204660666U (en) * | 2015-04-08 | 2015-09-23 | 青岛正大正电力环保设备有限公司 | A kind of external holder sprocket wheel |
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