Axially Mounted Slide Ring Seal with Rotary Lock Drive Connection
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Solution Overview
Problem
Existing mechanical seal arrangements face assembly challenges when positioned deep inside a machine's housing due to the inability to access radial connections for screw fixation or release, limiting their axial depth and increasing machine length.
Innovation Solution
A mechanical seal arrangement featuring a connection arrangement with rotary locks and recesses in the shaft sleeve, allowing torque transmission through a form-fit connection that can be actuated from the axial direction, enabling deep housing placement and reducing overall machine length.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the mechanical seal arrangement is positioned deep inside the housing to reduce axial length, then the machine's axial length is reduced, but radial access for screw fixation and release becomes impossible
Solution Approach 1:
The connection arrangement changes the operational dimension from radial to axial. The rotary locks are designed to be actuated axially through the housing, allowing installation and release of the driver on the shaft sleeve without requiring radial access. This dimensional shift resolves the contradiction by enabling deep positioning while maintaining operability.
Solution Approach 2:
The rotary locks serve as intermediary elements between the driver and the housing. These locks engage with recesses in the shaft sleeve and can be rotated axially to secure or release the driver connection. This intermediary mechanism enables torque transmission while allowing axial actuation, solving the accessibility problem.
2Strength
If a radial screw connection is used to fix the driver to the shaft sleeve, then secure torque transmission is achieved, but the mechanical seal arrangement cannot be positioned deep inside the housing
Solution Approach 1:
The connection mechanism transitions from radial screw fixation to axial rotary lock engagement. The rotary locks engage with recesses in the shaft sleeve through axial movement and rotation, providing secure torque transmission without requiring radial access. This enables the mechanical seal to be positioned deeper in the housing.
Solution Approach 2:
The rotary locks provide a dynamic connection that can be engaged and disengaged through axial rotation. During operation, the locks remain securely engaged to transmit torque, but can be easily released by axial actuation. This dynamic characteristic maintains strength while enabling deep positioning.
3Ease of operation
If the mechanical seal arrangement is positioned at the end of the shaft, then radial access for assembly is easy, but the axial overall length of the machine increases
Solution Approach 1:
The assembly operation moves from radial access at the shaft end to axial access through the housing. The rotary locks can be actuated axially through the housing wall, allowing assembly and disassembly without requiring radial access. This enables the mechanical seal to be positioned deeper in the housing, reducing overall axial length.
Solution Approach 2:
The rotary locks act as intermediaries that bridge the driver and shaft sleeve through axial engagement. They can be operated through the housing from the axial direction, providing easy assembly and disassembly while enabling deep positioning of the mechanical seal arrangement.
Data Source
AI summary
The invention relates to a mechanical seal arrangement comprising a first slide ring seal (2) having a rotating slide ring (21) and a stationary slide ring (22) defining a sealing gap (23) therebetween, a shaft sleeve (4), a driver (5) which connects the shaft sleeve (4) to the rotating slide ring (21) and which is arranged to transmit rotation of the shaft sleeve (4) to the rotating slide ring (21) a connecting arrangement (6) for connecting the shaft sleeve (4) to the driver (5), the connecting arrangement (6) comprising at least two rotary locks (60) and at least two recesses (40) in the shaft sleeve (4), wherein each of the rotary locks (60) has a bearing portion (61) and a locking portion (62), wherein the locking portion (62) laterally projects beyond the bearing portion (61), and wherein a rotational axis (Y-Y) of each rotary lock (60) is parallel to a central axis (X-X) of the shaft sleeve (4).