鎖緊盤在工業變速箱中的應用  

Application of Shrink Discs in Industrial Gearboxes

鎖緊盤是一種外部鎖緊裝置，它既有過盈配合的高傳遞能力，又有傳統聯結方法的所有優點， 但是其裝配和拆卸卻更加容易和迅速。當扭矩通過一個軸和一個空心軸之間的聯結傳遞時，當前的解決方案是使用鎖緊盤而不是容易發生故障的鍵聯結。鎖緊盤的內徑通常為14 mm至500 mm。

在本文中，我們將簡要介紹RINGFEDER POWER TRANSMISSION的另一個應用解決方案，它是與巴西的變速箱行業客戶的設計團隊合作開發的。

Shrink discs are external locking devices that provide a high capacity interference fit as well as all positive features of a conventional connection method, but which are much easier and faster to assemble and dismount. When a torque is transmitted through the connection of a shaft and a hollow shaft, the contemporary solution is to use a shrink disc instead of a failure-prone keyed connection. Shrink discs are typically available with inner diameters from 14 mm up to 500 mm.

In this article we take a brief look at another application solution of RINGFEDER POWER TRANSMISSION, which was developed in partnership with the design team of a customer in the gearbox industry located in Brazil.

Geremia Redutores / Gearbox with RINGFEDER Shrink Disc 62 RfN 4061

挑戰

客戶聯系RINGFEDER，提出了一個緊急請求，要求為工業變速箱提供解決方案。該變速箱不僅需要滿足高扭矩要求，而且必須設計一個直徑900mm的空心軸。對于900mm的軸直徑，與之相應的鎖緊盤當然必須大于標準的制造直徑，因此對生產來說是一個額外的挑戰。

工作原理

如下圖（截面圖RfN 4181 900x1470）所示，夾緊螺釘一擰緊，前止推環和后止推環就被沿著錐度方向拉到一起。這會導致空心軸收縮并在實心軸上產生表面壓力，從而通過軸與空心軸之間的摩擦確保安全的扭矩傳遞。

The Challenge

The customer contacted RINGFEDER with an urgent request to provide a solution for an industrial gearbox which not only had to fulfill high torque requirements, but also had to be designed for a hollow shaft with a diameter of 900 mm. For a shaft diameter of 900 mm, the corresponding shrink disc, of course, had to be larger than the standard diameters manufactured and was thus an additional challenge for production.

Functional Principle

As seen in drawing 1 (Sectional drawing RfN 4181 900x1470 to the right), the front and rear thrust rings are pulled together over the taper as soon as the clamping screws are tightened. This causes the hollow shaft to shrink and generates a surface pressure on the solid shaft – thus ensuring a safe torque transmission through friction between the shaft and hollow shaft.

解決方案和制造生產

針對上述特殊要求，原材料性能是保證鎖緊盤安全性能的重要參數之一。客戶和競爭對手通常不考慮這一點。機床是根據要求和工作所需的理想機器而精確地選擇的，它對生產的成本效益有很大的影響，對有競爭力的定價也有很大的影響。

Solution and Production

In regards to the special requirements mentioned above, the raw material properties are one of the most important parameters to guarantee a safe shrink disc performance. This is often not considered by customers and competitors. Machining tools, precisely chosen based on the requirements and the selection of the ideally suited machine for the job, have great influence on cost-efficient production and last but not least, on competitive pricing.

RINGFEDER Shrink Disc 900 RfN 4181 in production

對于我們的客戶來說，最可靠、最經濟的解決方案是特殊設計的鎖緊盤系列RfN 4181。另一個挑戰是生產時間，因為急需鎖緊盤。我們成功地把標準制造時間縮短到10周。

The most reliable and cost efficient solution for our customer was a special design of the shrink disc series RfN 4181. Another challenge was the production time frame because the shrink disc was urgently needed. We managed it to reduce the standard manufacturing time to only ten weeks.

RINGFEDER Shrink Disc 900 RfN 4181

我們的目標是成為應用導向的解決方案提供商。在這種情況下，我們也成功地解決了客戶的應用問題，提供了一個標準產品的特殊版本，即更大尺寸的重型鎖緊盤系列RfN 4181。目前，這是巴西最大的鎖緊盤。

Our claim is to be a provider of application-oriented solutions. In this case, too, we successfully solved a customer's application problem by offering a special version of a standard product, i.e. a larger size of our heavy-duty shrink disc series RfN 4181. And presently, this is the biggest shrink disc installed in Brazil.