行业组件数据 · 2026

行星架

行星架是行星齿轮组中的关键旋转部件,用于安装行星齿轮,保持其与太阳轮和齿圈的精确对齐和中心距,传递扭矩并承受径向和轴向载荷。

技术定义与适配语境
典型 行星架 会按材料、尺寸公差、适配关系和失效风险在 机械和设备制造 中评估。

行星架,也称为行星齿轮架,是行星齿轮组中的关键旋转部件。它作为行星齿轮(卫星齿轮)的安装结构,这些行星齿轮均匀分布,在绕自身轴线旋转的同时,也绕太阳轮公转。行星架的主要功能是保持行星齿轮与太阳轮/齿圈之间的精确对齐和中心距,将扭矩从行星齿轮传递到输出轴(或根据配置反向传递),并承受运行过程中产生的显著径向和轴向载荷。其设计直接影响齿轮组的载荷分布、效率和噪声-振动-平顺性(NVH)特性。 行星架与行星齿轮作为一个整体旋转。在典型的行星系统中,三个主要元件(太阳轮、齿圈或行星架)中的一个被固定,另一个作为输入,第三个作为输出。行星架的旋转由行星齿轮与太阳轮(中心)和齿圈(外缘)啮合的运动决定。其设计确保所有行星齿轮均等分担载荷,提供高扭矩密度和紧凑的动力传输。

组件规格

定义
行星架,也称为行星齿轮架,是行星齿轮组中的关键旋转部件。它作为行星齿轮(卫星齿轮)的安装结构,这些行星齿轮均匀分布,在绕自身轴线旋转的同时,也绕太阳轮公转。行星架的主要功能是保持行星齿轮与太阳轮/齿圈之间的精确对齐和中心距,将扭矩从行星齿轮传递到输出轴(或根据配置反向传递),并承受运行过程中产生的显著径向和轴向载荷。其设计直接影响齿轮组的载荷分布、效率和噪声-振动-平顺性(NVH)特性。

行星架与行星齿轮作为一个整体旋转。在典型的行星系统中,三个主要元件(太阳轮、齿圈或行星架)中的一个被固定,另一个作为输入,第三个作为输出。行星架的旋转由行星齿轮与太阳轮(中心)和齿圈(外缘)啮合的运动决定。其设计确保所有行星齿轮均等分担载荷,提供高扭矩密度和紧凑的动力传输。
工作原理
The carrier body rotates as a unit with the planet gears. In a typical planetary system, one of the three main elements (sun gear, ring gear, or carrier) is held stationary, another is used as the input, and the third serves as the output. The carrier body's rotation is determined by the motion of the planet gears as they mesh with both the sun gear (at the center) and the ring gear (on the outer perimeter). Its design ensures that all planet gears share the load equally, providing high torque density and compact power transmission.
材料
通常采用中碳合金钢(如AISI 4140、4340或8620)锻造或机加工而成以获得高强度和韧性。对于高性能或对重量敏感的应用材料可包括渗碳钢(如20MnCr5)、球墨铸铁(如GGG-40/50)或铝合金(如7075-T6)并进行适当的热处理(淬火和回火、渗碳或氮化)。钢制部件的表面硬度通常在45-60 HRC范围内以抵抗齿轮轴承表面的磨损。
Weight
1-50 kg (varies with size and material)
Maximum RPM
500-10,000 rpm (depends on balance and lubrication)
Bore Diameter
20-200 mm (standard range)
Surface Finish
Ra 1.6-3.2 μm (critical bearing surfaces)
Flange Diameter
50-500 mm
Dynamic Load Rating
3-300 kN
Static Load Capacity
5-500 kN
Dimensional Tolerance
IT6-IT7
Number of Planet Gears
3, 4, 5, or 6 (most common)
Planet Pin Hole Diameter
10-100 mm
标准
ISO 6336ISO 1328DIN 3960DIN 3961AGMA 2001AGMA 6110

行业分类与别名

行星架 的常用贸易名称、技术标识和检索关键词。

上级产品

该组件会出现在以下整机或工业产品中。

FMEA · 风险与缓解

诱因 → 失效模式 → 工程缓解

Insufficient material strength or improper heat treatment->Crack propagation from stress concentrations (e.g., at pin holes)->Use certified alloy steels with Charpy impact testing; apply shot peening to compress surface layers; implement non-destructive testing (NDT) like magnetic particle inspection during manufacturing.
Poor lubrication or contaminated lubricant->Accelerated adhesive wear at planet pin interfaces, leading to increased clearance and impact loads->Specify appropriate EP (extreme pressure) gear oils with filtration systems; design integrated oil passages for direct lubrication; use hardened and ground pins with suitable surface finish.
Manufacturing errors in hole position or diameter->Uneven load distribution among planet gears, causing premature pitting or tooth breakage->Employ CNC machining with tool wear compensation; verify geometry with CMM (Coordinate Measuring Machine) inspection; implement statistical process control (SPC) for critical dimensions.
Excessive operating loads beyond design limits->Plastic deformation or brittle fracture of the carrier arms->Incorporate torque limiters or overload protection in the drive system; conduct finite element analysis (FEA) during design to validate stress levels; define clear operational limits in manuals.

工业生态与工程逻辑

0
Fatigue cracking due to cyclic torsional/bending loads
1
Wear at planet pin bore surfaces leading to misalignment
2
Bearing failure on planet pins causing seizure
3
Imbalance from manufacturing defects or damage inducing vibration
4
Corrosion in harsh environments weakening the structure

合规与检测

tolerance
Geometric tolerances per ISO 1101:2017; hole position tolerance typically within ±0.02 mm; concentricity of bore to flange within 0.03 mm TIR
test method
Dimensional verification via CMM; hardness testing per ISO 6508 (Rockwell); magnetic particle inspection per ASTM E1444 for surface cracks; dynamic balance testing to ISO 1940-1 G2.5 grade; functional testing under load in gearbox assembly

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制造商列表用于前期研究和供应商能力理解,不代表认证、排名或交易担保。

采购评估维度

不是客户评论,也不是实时热度。以下维度用于前期 RFQ 准备和供应商评估。

技术文档
4/5
制造能力
4/5
可检验性
5/5
供应商透明度
3/5

这些分值是采购评估维度示例,不代表真实客户评分、具体国家买家反馈或实时询盘。

相关组件

常见问题

What is the difference between a carrier body and a planet carrier?

These terms are generally synonymous in industrial contexts. 'Carrier body' often emphasizes the structural housing aspect, while 'planet carrier' refers to the complete assembly including pins/bearings for the planet gears. Both describe the central component that holds the planet gears.

Why are carrier bodies typically made of alloy steel?

Alloy steels like 4140 or 4340 provide an optimal balance of high tensile strength, fatigue resistance, and toughness required to withstand the cyclic bending and torsional stresses in planetary gear systems. They also respond well to heat treatment for enhanced surface hardness and core durability.

How does the number of planet gears affect carrier body design?

More planet gears (e.g., 5 vs. 3) allow higher torque capacity and better load sharing but require a larger, more rigid carrier body with precise hole spacing to maintain equal load distribution. This increases manufacturing complexity and weight.

Can a damaged carrier body be repaired?

Typically not recommended. Critical wear or cracks in the planet pin holes or mounting surfaces compromise structural integrity and precise geometry. Replacement is standard practice to ensure system reliability and prevent catastrophic gear failure.

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CNFX Industrial Component Index · 机械和设备制造

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