Custom marine two-blade three-blade forward and reverse propellers

Item No.: SC-CNC00025-00
Ship propeller. Generally, precision CNC machining is used to ensure smooth blade surface and balanced distribution of blades. Thereby reducing noise, reducing propeller vibration and other advantages ......
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Description FAQ Review
Description

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什么是螺旋桨

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螺旋桨是指通过叶片在空气或水中的旋转,将发动机的旋转动力转化为推进力的装置。可以有两个或多个叶子连接到轮毂,叶子的背面是螺旋表面或类似于螺旋表面的螺旋桨。螺旋桨的种类很多,应用广泛,如飞机和轮船的螺旋桨。

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船桨是如何诞生的
1836年,英国“阿基米德”号使用了螺旋,这是一种像螺丝一样的长木螺旋桨。
在测试开始时,它以 4 节的速度航行。突然,水中的一个障碍物打破了螺丝,只留下了一小部分。就在海军建筑师史密斯不知所措的时候,这艘船出人意料地加速到每小时 13 节。
这件事启发了造船工程师,他们把长螺丝改成了短螺丝,再把短螺丝变成叶片形状,螺旋桨就这样诞生了。

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工作原理

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螺旋桨可以讨论为旋转和前进的机翼。流经叶片各部分的气流由沿旋转方向的前进速度和旋转产生的切向速度组成。在螺旋桨半径 r1 和 r2 (r1

当空气流过叶片各小段时,产生空气动力、阻力ΔD和升力ΔL,合成后的总空气动力为ΔR。ΔR沿飞行方向的分量力为拉力ΔT,与螺旋桨旋转方向相反的力ΔP阻止螺旋桨旋转。拉力和整个叶片上每个小段的拉力和阻止旋转的力相加,形成螺旋桨的拉力和阻止螺旋桨旋转的力矩。

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工作原理
有必要使螺旋桨的每一部分以相对较大的升阻比以迎角工作,以获得更大的拉力和更小的阻力力矩,即更高的效率。当螺旋桨工作时。轴向速度不随半径变化,而切向速度随半径变化。因此,在叶片尖端附近,半径越大,气流角度越小,相应的叶片角度也应较小。而在叶片根部附近,半径越小,气流角度越大,相应的叶片角度也应较大。螺旋桨的叶片角度应按一定规律从叶尖到叶根逐渐增大。所以更准确地说螺旋桨是一个扭曲的机翼。

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结构特点
螺旋桨有2、3或4个叶片,一般叶片数量越多,吸收的功率越大。有时在大功率涡轮螺旋桨飞机上使用的是套筒式螺旋桨,它实际上是两个反向旋转的螺旋桨,用于抵消无功扭矩。在发动机功率小于100千瓦的轻型飞机上,通常使用两叶木制螺旋桨。它由一块拼接木头两侧的扭曲叶片制成,中间开口与发动机轴相连。
螺旋桨在高速旋转时必须承受叶片本身的离心惯性力和空气动力载荷。大功率螺旋桨在叶片根部承受高达 200 kN(20 吨力)的离心力。此外,还有由发动机和空气动力引起的振动。
大功率发动机一般采用3叶和4叶螺旋桨,制造叶片时常采用铝合金和钢制。由于材料的强度,铝和钢叶片可以做得更薄,这有利于提高螺旋桨在高速下的效率。

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船舶螺旋桨加工技术
上川精密使用五轴联动加工中心,一次性完成整体加工。加工尺寸精度高,产品表面光滑,整体误差不超过0.05mm。可为造船业等相关行业的关键零部件提供定制加工。
螺旋桨是高精度精密零件,一般的三轴加工中心无法加工。因此,制造成本也相对昂贵。

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螺旋桨加工工艺
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螺旋桨是高精度零件。通常,镍青铜和铝作为主要材料,当然也有不锈钢。
其加工工艺主要由5轴CNC加工制成。叶片表面光滑,对称性高。最高精度可以达到0.03mm。
Since the surface of the propeller is a helical curved surface. Therefore, traditional CNC machine tools cannot process such high-precision parts. Kamikawa Precision uses an imported five-axis machining center to complete the machining of the entire part at one time. It has the advantages of high overall precision, smooth surface, low noise and large thrust.

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Kamikawa precision CNC machining classic case
Our CNC machining technology can not only process high-precision dimensions, but also provide customers with various surface treatment technologies. Many customers have relatively high requirements on the surface of their products, and some factories can meet the size requirements, but they always fail to do surface treatment. This makes customers very dissatisfied. If you choose to cooperate with us, we will provide you with unexpected technologies and services.
 
Contact:Weixiang Gu / CTO
Office Phone: +86 752 2608717
Whatsapp/Tel: +86 13360877296
WeChat/Skype: +86 13360877296
Huizhou KamiKawa Precision Technology Co., Ltd.
Address: Dinghong Industrial Park, No. 43 Lianfa Avenue, Tong Qiao Industrial Park, Huicheng District, Huizhou City, zip code: 516032, Guang Dong Province, China

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Hello, what can we do for you?
Dear Friends, Hello Thank you for visiting our website. We are a professional custom supplier of precision parts, which can provide you with: CNC machining parts, precision die casting parts, precision injection molding parts, precision casting parts, MIM molding parts, precision stamping parts, as well as plastic metal molds and non-standard automation design, etc. . One-stop service. We are a Tier 1 supplier to Haas Corporation of America and Diehl Metal of Germany. We have excellent performance in metal processing and surface treatment. You seem to be very interested in our products. We can start by discussing the technical aspects of the product. please do not hesitate. Contact me now by any of the methods below. Weixiang Gu / CTO Whatsapp / Tel: +86 13360877296 Skype: +86 13360877296 E-mail: wx.gu@hakamikawa.com